ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Articles  (255)
  • Mice  (255)
  • Mice, Inbred C57BL  (69)
  • Nature Publishing Group (NPG)  (255)
  • American Institute of Physics (AIP)
  • Wiley
  • 2010-2014  (255)
  • 1990-1994
  • 2013  (255)
Collection
  • Articles  (255)
Publisher
Years
  • 2010-2014  (255)
  • 1990-1994
Year
  • 1
    Publication Date: 2013-10-25
    Description: Mutations in SHANK3 and large duplications of the region spanning SHANK3 both cause a spectrum of neuropsychiatric disorders, indicating that proper SHANK3 dosage is critical for normal brain function. However, SHANK3 overexpression per se has not been established as a cause of human disorders because 22q13 duplications involve several genes. Here we report that Shank3 transgenic mice modelling a human SHANK3 duplication exhibit manic-like behaviour and seizures consistent with synaptic excitatory/inhibitory imbalance. We also identified two patients with hyperkinetic disorders carrying the smallest SHANK3-spanning duplications reported so far. These findings indicate that SHANK3 overexpression causes a hyperkinetic neuropsychiatric disorder. To probe the mechanism underlying the phenotype, we generated a Shank3 in vivo interactome and found that Shank3 directly interacts with the Arp2/3 complex to increase F-actin levels in Shank3 transgenic mice. The mood-stabilizing drug valproate, but not lithium, rescues the manic-like behaviour of Shank3 transgenic mice raising the possibility that this hyperkinetic disorder has a unique pharmacogenetic profile.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3923348/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3923348/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Han, Kihoon -- Holder, J Lloyd Jr -- Schaaf, Christian P -- Lu, Hui -- Chen, Hongmei -- Kang, Hyojin -- Tang, Jianrong -- Wu, Zhenyu -- Hao, Shuang -- Cheung, Sau Wai -- Yu, Peng -- Sun, Hao -- Breman, Amy M -- Patel, Ankita -- Lu, Hui-Chen -- Zoghbi, Huda Y -- 1R01NS070302/NS/NINDS NIH HHS/ -- 2T32NS043124/NS/NINDS NIH HHS/ -- P30HD024064/HD/NICHD NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2013 Nov 7;503(7474):72-7. doi: 10.1038/nature12630. Epub 2013 Oct 23.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas 77030, USA [2] Howard Hughes Medical Institute, Baylor College of Medicine, Houston, Texas 77030, USA [3] Jan and Dan Duncan Neurological Research Institute at Texas Children's Hospital, Houston, Texas 77030, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24153177" target="_blank"〉PubMed〈/a〉
    Keywords: Actin-Related Protein 2-3 Complex/metabolism ; Actins/metabolism ; Adult ; Animals ; Behavior, Animal ; Bipolar Disorder/*drug therapy/genetics/*physiopathology ; Chromosomes, Human, Pair 22/genetics ; Disease Models, Animal ; Excitatory Postsynaptic Potentials ; Female ; Gene Dosage/genetics ; Gene Expression/genetics ; Genes, Duplicate/genetics ; Humans ; Hyperkinesis/genetics/physiopathology ; Inhibitory Postsynaptic Potentials ; Lithium/pharmacology ; Male ; Mice ; Mice, Transgenic ; Nerve Tissue Proteins/*genetics/*metabolism ; Seizures/genetics ; Valproic Acid/pharmacology/therapeutic use
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    Publication Date: 2013-03-12
    Description: CLP1 was the first mammalian RNA kinase to be identified. However, determining its in vivo function has been elusive. Here we generated kinase-dead Clp1 (Clp1(K/K)) mice that show a progressive loss of spinal motor neurons associated with axonal degeneration in the peripheral nerves and denervation of neuromuscular junctions, resulting in impaired motor function, muscle weakness, paralysis and fatal respiratory failure. Transgenic rescue experiments show that CLP1 functions in motor neurons. Mechanistically, loss of CLP1 activity results in accumulation of a novel set of small RNA fragments, derived from aberrant processing of tyrosine pre-transfer RNA. These tRNA fragments sensitize cells to oxidative-stress-induced p53 (also known as TRP53) activation and p53-dependent cell death. Genetic inactivation of p53 rescues Clp1(K/K) mice from the motor neuron loss, muscle denervation and respiratory failure. Our experiments uncover a mechanistic link between tRNA processing, formation of a new RNA species and progressive loss of lower motor neurons regulated by p53.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3674495/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3674495/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hanada, Toshikatsu -- Weitzer, Stefan -- Mair, Barbara -- Bernreuther, Christian -- Wainger, Brian J -- Ichida, Justin -- Hanada, Reiko -- Orthofer, Michael -- Cronin, Shane J -- Komnenovic, Vukoslav -- Minis, Adi -- Sato, Fuminori -- Mimata, Hiromitsu -- Yoshimura, Akihiko -- Tamir, Ido -- Rainer, Johannes -- Kofler, Reinhard -- Yaron, Avraham -- Eggan, Kevin C -- Woolf, Clifford J -- Glatzel, Markus -- Herbst, Ruth -- Martinez, Javier -- Penninger, Josef M -- K99NS077435-01A1/NS/NINDS NIH HHS/ -- NS038253/NS/NINDS NIH HHS/ -- P 19223/Austrian Science Fund FWF/Austria -- P 21667/Austrian Science Fund FWF/Austria -- R00 NS077435/NS/NINDS NIH HHS/ -- R01 NS038253/NS/NINDS NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2013 Mar 28;495(7442):474-80. doi: 10.1038/nature11923. Epub 2013 Mar 10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉IMBA, Institute of Molecular Biotechnology of the Austrian Academy of Sciences, Vienna 1030, Austria.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23474986" target="_blank"〉PubMed〈/a〉
    Keywords: Amyotrophic Lateral Sclerosis ; Animals ; Animals, Newborn ; Axons/metabolism/pathology ; Cell Death ; Diaphragm/innervation ; Embryo Loss ; Embryo, Mammalian/metabolism/pathology ; Exons/genetics ; Female ; Fibroblasts ; Male ; Mice ; Mice, Inbred C57BL ; Mice, Knockout ; Mice, Transgenic ; Motor Neurons/*metabolism/*pathology ; Muscular Atrophy, Spinal ; Neuromuscular Diseases/metabolism/pathology ; Oxidative Stress ; RNA Processing, Post-Transcriptional ; RNA, Transfer, Tyr/genetics/*metabolism ; Respiration ; Spinal Nerves/cytology ; Transcription Factors/deficiency/*metabolism ; Tumor Suppressor Protein p53/metabolism ; Tyrosine/genetics/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    Publication Date: 2013-08-24
    Description: The RAG1/RAG2 endonuclease (RAG) initiates the V(D)J recombination reaction that assembles immunoglobulin heavy (IgH) and light (IgL) chain variable region exons from germline gene segments to generate primary antibody repertoires. IgH V(D)J assembly occurs in progenitor (pro-) B cells followed by that of IgL in precursor (pre-) B cells. Expression of IgH mu and IgL (Igkappa or Iglambda) chains generates IgM, which is expressed on immature B cells as the B-cell antigen-binding receptor (BCR). Rag expression can continue in immature B cells, allowing continued Igkappa V(D)J recombination that replaces the initial VkappaJkappa exon with one that generates a new specificity. This 'receptor editing' process, which can also lead to Iglambda V(D)J recombination and expression, provides a mechanism whereby antigen encounter at the Rag-expressing immature B-cell stage helps shape pre-immune BCR repertoires. As the major site of postnatal B-cell development, the bone marrow is the principal location of primary immunoglobulin repertoire diversification in mice. Here we report that early B-cell development also occurs within the mouse intestinal lamina propria (LP), where the associated V(D)J recombination/receptor editing processes modulate primary LP immunoglobulin repertoires. At weanling age in normally housed mice, the LP contains a population of Rag-expressing B-lineage cells that harbour intermediates indicative of ongoing V(D)J recombination and which contain cells with pro-B, pre-B and editing phenotypes. Consistent with LP-specific receptor editing, Rag-expressing LP B-lineage cells have similar VH repertoires, but significantly different Vkappa repertoires, compared to those of Rag2-expressing bone marrow counterparts. Moreover, colonization of germ-free mice leads to an increased ratio of Iglambda-expressing versus Igkappa-expressing B cells specifically in the LP. We conclude that B-cell development occurs in the intestinal mucosa, where it is regulated by extracellular signals from commensal microbes that influence gut immunoglobulin repertoires.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3807868/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3807868/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wesemann, Duane R -- Portuguese, Andrew J -- Meyers, Robin M -- Gallagher, Michael P -- Cluff-Jones, Kendra -- Magee, Jennifer M -- Panchakshari, Rohit A -- Rodig, Scott J -- Kepler, Thomas B -- Alt, Frederick W -- AI020047/AI/NIAID NIH HHS/ -- AI89972/AI/NIAID NIH HHS/ -- HHSN272201000053C/PHS HHS/ -- K08 AI089972/AI/NIAID NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2013 Sep 5;501(7465):112-5. doi: 10.1038/nature12496. Epub 2013 Aug 21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Program in Cellular and Molecular Medicine and Department of Medicine, Children's Hospital Boston, Boston, Massachusetts 02115, USA. dwesemann@research.bwh.harvard.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23965619" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; B-Lymphocytes/*cytology/*immunology/metabolism ; Bone Marrow Cells/cytology/immunology ; *Cell Lineage ; DNA-Binding Proteins/genetics/metabolism ; Gene Rearrangement, B-Lymphocyte/genetics ; Germ-Free Life ; Immunoglobulins/genetics/immunology ; Intestinal Mucosa/*cytology/*immunology ; Mice ; Precursor Cells, B-Lymphoid/cytology/metabolism ; Symbiosis ; Weaning
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 4
    Publication Date: 2013-09-06
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rathinam, Vijay A K -- Fitzgerald, Katherine A -- England -- Nature. 2013 Sep 12;501(7466):173-5. doi: 10.1038/nature12556. Epub 2013 Sep 4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24005321" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Caspases/metabolism ; Cytoplasm/immunology/*metabolism ; Gram-Negative Bacteria/*immunology ; Humans ; Immunity, Innate ; Inflammasomes/immunology/metabolism ; Lipopolysaccharides/analysis/*immunology ; Mice ; Toll-Like Receptor 4
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 5
    Publication Date: 2013-08-27
    Description: Early sensory experience instructs the maturation of neural circuitry in the cortex. This has been studied extensively in the primary visual cortex, in which loss of vision to one eye permanently degrades cortical responsiveness to that eye, a phenomenon known as ocular dominance plasticity (ODP). Cortical inhibition mediates this process, but the precise role of specific classes of inhibitory neurons in ODP is controversial. Here we report that evoked firing rates of binocular excitatory neurons in the primary visual cortex immediately drop by half when vision is restricted to one eye, but gradually return to normal over the following twenty-four hours, despite the fact that vision remains restricted to one eye. This restoration of binocular-like excitatory firing rates after monocular deprivation results from a rapid, although transient, reduction in the firing rates of fast-spiking, parvalbumin-positive (PV) interneurons, which in turn can be attributed to a decrease in local excitatory circuit input onto PV interneurons. This reduction in PV-cell-evoked responses after monocular lid suture is restricted to the critical period for ODP and appears to be necessary for subsequent shifts in excitatory ODP. Pharmacologically enhancing inhibition at the time of sight deprivation blocks ODP and, conversely, pharmacogenetic reduction of PV cell firing rates can extend the critical period for ODP. These findings define the microcircuit changes initiating competitive plasticity during critical periods of cortical development. Moreover, they show that the restoration of evoked firing rates of layer 2/3 pyramidal neurons by PV-specific disinhibition is a key step in the progression of ODP.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3962838/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3962838/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kuhlman, Sandra J -- Olivas, Nicholas D -- Tring, Elaine -- Ikrar, Taruna -- Xu, Xiangmin -- Trachtenberg, Joshua T -- EY016052/EY/NEI NIH HHS/ -- NS078434/NS/NINDS NIH HHS/ -- R00 DA023700/DA/NIDA NIH HHS/ -- R01 EY023871/EY/NEI NIH HHS/ -- R01 NS078434/NS/NINDS NIH HHS/ -- England -- Nature. 2013 Sep 26;501(7468):543-6. doi: 10.1038/nature12485. Epub 2013 Aug 25.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurobiology, David Geffen School of Medicine, University of California, Los Angeles, California 90048, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23975100" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Critical Period (Psychology) ; Dominance, Ocular/drug effects/*physiology ; Female ; Interneurons/cytology/drug effects ; Lasers ; Male ; Mice ; *Neural Inhibition/drug effects ; Neuronal Plasticity/drug effects/*physiology ; Parvalbumins/metabolism ; Photic Stimulation ; Sensory Deprivation/physiology ; Vision, Binocular/drug effects/physiology ; Vision, Monocular/drug effects/*physiology ; Visual Cortex/cytology/drug effects/*physiology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 6
    facet.materialart.
    Unknown
    Nature Publishing Group (NPG)
    Publication Date: 2013-05-31
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Smith, Kerri -- England -- Nature. 2013 May 30;497(7451):550-2. doi: 10.1038/497550a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23719444" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anxiety/drug therapy/metabolism ; Brain Mapping/instrumentation/*methods ; Child ; Child Development Disorders, Pervasive/pathology ; Cocaine-Related Disorders/prevention & control ; Depression/metabolism ; Dopamine/metabolism ; History, 21st Century ; Humans ; Imaging, Three-Dimensional/instrumentation/*methods ; Male ; Mice ; Microscopy ; Neural Pathways/physiology ; Neurosciences/instrumentation/*methods ; Opsins/metabolism/radiation effects ; Optogenetics/history ; Rats
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 7
    Publication Date: 2013-03-01
    Description: The rapid cell turnover of the intestinal epithelium is achieved from small numbers of stem cells located in the base of glandular crypts. These stem cells have been variously described as rapidly cycling or quiescent. A functional arrangement of stem cells that reconciles both of these behaviours has so far been difficult to obtain. Alternative explanations for quiescent cells have been that they act as a parallel or reserve population that replace rapidly cycling stem cells periodically or after injury; their exact nature remains unknown. Here we show mouse intestinal quiescent cells to be precursors that are committed to mature into differentiated secretory cells of the Paneth and enteroendocrine lineage. However, crucially we find that after intestinal injury they are capable of extensive proliferation and can give rise to clones comprising the main epithelial cell types. Thus, quiescent cells can be recalled to the stem-cell state. These findings establish quiescent cells as an effective clonogenic reserve and provide a motivation for investigating their role in pathologies such as colorectal cancers and intestinal inflammation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Buczacki, Simon J A -- Zecchini, Heather Ireland -- Nicholson, Anna M -- Russell, Roslin -- Vermeulen, Louis -- Kemp, Richard -- Winton, Douglas J -- Cancer Research UK/United Kingdom -- England -- Nature. 2013 Mar 7;495(7439):65-9. doi: 10.1038/nature11965. Epub 2013 Feb 27.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Cancer Research UK Cambridge Research Institute, Li Ka Shing Centre, Robinson Way, Cambridge CB2 0RE, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23446353" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biomarkers/analysis/metabolism ; Cell Differentiation ; Cell Division ; *Cell Lineage ; Cell Separation ; Clone Cells/cytology/metabolism ; Intestinal Neoplasms/pathology ; Intestines/cytology/injuries/pathology ; Mice ; Multipotent Stem Cells/*cytology/metabolism/*secretion ; Paneth Cells/*cytology/*metabolism ; Receptors, G-Protein-Coupled/*metabolism ; Regeneration ; Staining and Labeling ; Stem Cell Niche
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 8
    Publication Date: 2013-02-22
    Description: Pathogens often infect hosts through collective actions: they secrete growth-promoting compounds or virulence factors, or evoke host reactions that fuel the colonization of the host. Such behaviours are vulnerable to the rise of mutants that benefit from the collective action without contributing to it; how these behaviours can be evolutionarily stable is not well understood. We address this question using the intestinal pathogen Salmonella enterica serovar Typhimurium (hereafter termed S. typhimurium), which manipulates its host to induce inflammation, and thereby outcompetes the commensal microbiota. Notably, the virulence factors needed for host manipulation are expressed in a bistable fashion, leading to a slow-growing subpopulation that expresses virulence genes, and a fast-growing subpopulation that is phenotypically avirulent. Here we show that the expression of the genetically identical but phenotypically avirulent subpopulation is essential for the evolutionary stability of virulence in this pathogen. Using a combination of mathematical modelling, experimental evolution and competition experiments we found that within-host evolution leads to the emergence of mutants that are genetically avirulent and fast-growing. These mutants are defectors that exploit inflammation without contributing to it. In infection experiments initiated with wild-type S. typhimurium, defectors increase only slowly in frequency. In a genetically modified S. typhimurium strain in which the phenotypically avirulent subpopulation is reduced in size, defectors rise more rapidly, inflammation ceases prematurely, and S. typhimurium is quickly cleared from the gut. Our results establish that host manipulation by S. typhimurium is a cooperative trait that is vulnerable to the rise of avirulent defectors; the expression of a phenotypically avirulent subpopulation that grows as fast as defectors slows down this process, and thereby promotes the evolutionary stability of virulence. This points to a key role of bistable virulence gene expression in stabilizing cooperative virulence and may lead the way to new approaches for controlling pathogens.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Diard, Mederic -- Garcia, Victor -- Maier, Lisa -- Remus-Emsermann, Mitja N P -- Regoes, Roland R -- Ackermann, Martin -- Hardt, Wolf-Dietrich -- England -- Nature. 2013 Feb 21;494(7437):353-6. doi: 10.1038/nature11913.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Microbiology, ETH Zurich, Wolfgang-Pauli-Str. 10, 8093 Zurich, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23426324" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biological Evolution ; Host-Pathogen Interactions ; Inflammation/microbiology/pathology ; Intestines/microbiology ; Mice ; Mice, Inbred C57BL ; Mutation ; *Phenotype ; Salmonella Infections/microbiology/prevention & control/transmission ; Salmonella typhimurium/genetics/growth & development/*pathogenicity ; Virulence/genetics/physiology ; Virulence Factors/genetics/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 9
    Publication Date: 2013-06-28
    Description: The activation-induced cytidine deaminase (AID; also known as AICDA) enzyme is required for somatic hypermutation and class switch recombination at the immunoglobulin locus. In germinal-centre B cells, AID is highly expressed, and has an inherent mutator activity that helps generate antibody diversity. However, AID may also regulate gene expression epigenetically by directly deaminating 5-methylcytosine in concert with base-excision repair to exchange cytosine. This pathway promotes gene demethylation, thereby removing epigenetic memory. For example, AID promotes active demethylation of the genome in primordial germ cells. However, different studies have suggested either a requirement or a lack of function for AID in promoting pluripotency in somatic nuclei after fusion with embryonic stem cells. Here we tested directly whether AID regulates epigenetic memory by comparing the relative ability of cells lacking AID to reprogram from a differentiated murine cell type to an induced pluripotent stem cell. We show that Aid-null cells are transiently hyper-responsive to the reprogramming process. Although they initiate expression of pluripotency genes, they fail to stabilize in the pluripotent state. The genome of Aid-null cells remains hypermethylated in reprogramming cells, and hypermethylated genes associated with pluripotency fail to be stably upregulated, including many MYC target genes. Recent studies identified a late step of reprogramming associated with methylation status, and implicated a secondary set of pluripotency network components. AID regulates this late step, removing epigenetic memory to stabilize the pluripotent state.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3762466/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3762466/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kumar, Ritu -- DiMenna, Lauren -- Schrode, Nadine -- Liu, Ting-Chun -- Franck, Philipp -- Munoz-Descalzo, Silvia -- Hadjantonakis, Anna-Katerina -- Zarrin, Ali A -- Chaudhuri, Jayanta -- Elemento, Olivier -- Evans, Todd -- AI072194/AI/NIAID NIH HHS/ -- HL056182/HL/NHLBI NIH HHS/ -- P30 CA008748/CA/NCI NIH HHS/ -- R01 HD052115/HD/NICHD NIH HHS/ -- R37 HL056182/HL/NHLBI NIH HHS/ -- T32 AI007621/AI/NIAID NIH HHS/ -- England -- Nature. 2013 Aug 1;500(7460):89-92. doi: 10.1038/nature12299. Epub 2013 Jun 26.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Surgery, Weill Cornell Medical College, New York, New York 10065, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23803762" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Dedifferentiation/genetics ; Cellular Reprogramming/genetics ; Cytidine Deaminase/genetics/*metabolism ; Epigenesis, Genetic/*genetics ; Female ; Fibroblasts/cytology/metabolism ; Gene Expression Regulation ; HEK293 Cells ; Humans ; Male ; Mice ; Pluripotent Stem Cells/*cytology/enzymology/*metabolism ; Transcription Factors/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 10
    Publication Date: 2013-01-22
    Description: The intestinal microbiota has a critical role in immune system and metabolic homeostasis, but it must be tolerated by the host to avoid inflammatory responses that can damage the epithelial barrier separating the host from the luminal contents. Breakdown of this regulation and the resulting inappropriate immune response to commensals are thought to lead to the development of inflammatory bowel diseases such as Crohn's disease and ulcerative colitis. We proposed that the intestinal immune system is instructed by the microbiota to limit responses to luminal antigens. Here we demonstrate in mice that, at steady state, the microbiota inhibits the transport of both commensal and pathogenic bacteria from the lumen to a key immune inductive site, the mesenteric lymph nodes (MLNs). However, in the absence of Myd88 or under conditions of antibiotic-induced dysbiosis, non-invasive bacteria were trafficked to the MLNs in a CCR7-dependent manner, and induced both T-cell responses and IgA production. Trafficking was carried out by CX(3)CR1(hi) mononuclear phagocytes, an intestinal-cell population previously reported to be non-migratory. These findings define a central role for commensals in regulating the migration to the MLNs of CX(3)CR1(hi) mononuclear phagocytes endowed with the ability to capture luminal bacteria, thereby compartmentalizing the intestinal immune response to avoid inflammation.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3711636/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3711636/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Diehl, Gretchen E -- Longman, Randy S -- Zhang, Jing-Xin -- Breart, Beatrice -- Galan, Carolina -- Cuesta, Adolfo -- Schwab, Susan R -- Littman, Dan R -- 5P30CA016087-32/CA/NCI NIH HHS/ -- R01 AI085166/AI/NIAID NIH HHS/ -- R01AI085166/AI/NIAID NIH HHS/ -- T32 CA009161/CA/NCI NIH HHS/ -- T32 DK083256/DK/NIDDK NIH HHS/ -- T32 DK083256-02/DK/NIDDK NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2013 Feb 7;494(7435):116-20. doi: 10.1038/nature11809. Epub 2013 Jan 13.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Molecular Pathogenesis Program, The Kimmel Center for Biology and Medicine of the Skirball Institute, New York University School of Medicine, New York, New York 10016, USA. Gretchen.Diehl@med.nyu.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23334413" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anti-Bacterial Agents/pharmacology ; Antigens, Bacterial/immunology ; Cell Movement ; Dendritic Cells/cytology/immunology ; Immunity, Mucosal/drug effects/*immunology ; Immunoglobulin A/immunology ; Inflammation/immunology ; Intestinal Mucosa/cytology/immunology/microbiology ; Lymph Nodes/*immunology/*microbiology ; Mesentery/*immunology ; Metagenome/immunology/*physiology ; Mice ; Mice, Inbred C57BL ; Myeloid Differentiation Factor 88/deficiency/metabolism ; Phagocytes/cytology/immunology/*metabolism/microbiology ; Phagocytosis ; Receptors, CCR7/deficiency/genetics/metabolism ; Receptors, Chemokine/*metabolism ; Salmonella/cytology/drug effects/immunology ; T-Lymphocytes/immunology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 11
    Publication Date: 2013-10-11
    Description: Cell cycle quiescence is a critical feature contributing to haematopoietic stem cell (HSC) maintenance. Although various candidate stromal cells have been identified as potential HSC niches, the spatial localization of quiescent HSCs in the bone marrow remains unclear. Here, using a novel approach that combines whole-mount confocal immunofluorescence imaging techniques and computational modelling to analyse significant three-dimensional associations in the mouse bone marrow among vascular structures, stromal cells and HSCs, we show that quiescent HSCs associate specifically with small arterioles that are preferentially found in endosteal bone marrow. These arterioles are ensheathed exclusively by rare NG2 (also known as CSPG4)(+) pericytes, distinct from sinusoid-associated leptin receptor (LEPR)(+) cells. Pharmacological or genetic activation of the HSC cell cycle alters the distribution of HSCs from NG2(+) periarteriolar niches to LEPR(+) perisinusoidal niches. Conditional depletion of NG2(+) cells induces HSC cycling and reduces functional long-term repopulating HSCs in the bone marrow. These results thus indicate that arteriolar niches are indispensable for maintaining HSC quiescence.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3821873/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3821873/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kunisaki, Yuya -- Bruns, Ingmar -- Scheiermann, Christoph -- Ahmed, Jalal -- Pinho, Sandra -- Zhang, Dachuan -- Mizoguchi, Toshihide -- Wei, Qiaozhi -- Lucas, Daniel -- Ito, Keisuke -- Mar, Jessica C -- Bergman, Aviv -- Frenette, Paul S -- HL069438/HL/NHLBI NIH HHS/ -- HL097700/HL/NHLBI NIH HHS/ -- R00 CA139009/CA/NCI NIH HHS/ -- R01 DK056638/DK/NIDDK NIH HHS/ -- R01 DK098263/DK/NIDDK NIH HHS/ -- R01 DK100689/DK/NIDDK NIH HHS/ -- R01 HL069438/HL/NHLBI NIH HHS/ -- R01 HL097700/HL/NHLBI NIH HHS/ -- R01 HL116340/HL/NHLBI NIH HHS/ -- T32 063754/PHS HHS/ -- England -- Nature. 2013 Oct 31;502(7473):637-43. doi: 10.1038/nature12612. Epub 2013 Oct 9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] Ruth L. and David S. Gottesman Institute for Stem Cell and Regenerative Medicine Research, Albert Einstein College of Medicine, Bronx, New York 10461, USA [2] Department of Cell Biology, Albert Einstein College of Medicine, Bronx, New York 10461, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24107994" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Arterioles/*cytology ; Bone Marrow/blood supply ; Cell Division ; Cell Separation ; Female ; Flow Cytometry ; Hematopoietic Stem Cells/*cytology/metabolism ; Male ; Mesenchymal Stromal Cells/cytology ; Mice ; Mice, Inbred C57BL ; Nestin/metabolism ; *Stem Cell Niche
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 12
    Publication Date: 2013-03-29
    Description: Protein N-myristoylation is a 14-carbon fatty-acid modification that is conserved across eukaryotic species and occurs on nearly 1% of the cellular proteome. The ability of the myristoyl group to facilitate dynamic protein-protein and protein-membrane interactions (known as the myristoyl switch) makes it an essential feature of many signal transduction systems. Thus pathogenic strategies that facilitate protein demyristoylation would markedly alter the signalling landscape of infected host cells. Here we describe an irreversible mechanism of protein demyristoylation catalysed by invasion plasmid antigen J (IpaJ), a previously uncharacterized Shigella flexneri type III effector protein with cysteine protease activity. A yeast genetic screen for IpaJ substrates identified ADP-ribosylation factor (ARF)1p and ARF2p, small molecular mass GTPases that regulate cargo transport through the Golgi apparatus. Mass spectrometry showed that IpaJ cleaved the peptide bond between N-myristoylated glycine-2 and asparagine-3 of human ARF1, thereby providing a new mechanism for host secretory inhibition by a bacterial pathogen. We further demonstrate that IpaJ cleaves an array of N-myristoylated proteins involved in cellular growth, signal transduction, autophagasome maturation and organelle function. Taken together, these findings show a previously unrecognized pathogenic mechanism for the site-specific elimination of N-myristoyl protein modification.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3722872/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3722872/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Burnaevskiy, Nikolay -- Fox, Thomas G -- Plymire, Daniel A -- Ertelt, James M -- Weigele, Bethany A -- Selyunin, Andrey S -- Way, Sing Sing -- Patrie, Steven M -- Alto, Neal M -- 5T32AI007520/AI/NIAID NIH HHS/ -- R01 AI083359/AI/NIAID NIH HHS/ -- R01 AI087830/AI/NIAID NIH HHS/ -- R01 AI100934/AI/NIAID NIH HHS/ -- R01 GM100486/GM/NIGMS NIH HHS/ -- R01AI083359/AI/NIAID NIH HHS/ -- R01GM100486/GM/NIGMS NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2013 Apr 4;496(7443):106-9. doi: 10.1038/nature12004. Epub 2013 Mar 27.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390-8816, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23535599" target="_blank"〉PubMed〈/a〉
    Keywords: ADP-Ribosylation Factor 1/chemistry/metabolism ; ADP-Ribosylation Factors/metabolism ; Amino Acid Sequence ; Animals ; Antigens, Bacterial/*metabolism ; Asparagine/metabolism ; Autophagy ; Biocatalysis ; Cysteine Proteases/metabolism ; Dysentery, Bacillary ; Female ; Glycine/metabolism ; Golgi Apparatus/metabolism/pathology ; HEK293 Cells ; HeLa Cells ; Humans ; Listeria monocytogenes/physiology ; Mice ; Mice, Inbred C57BL ; Molecular Sequence Data ; Myristic Acid/*metabolism ; Phagosomes/metabolism ; *Protein Processing, Post-Translational ; *Proteolysis ; Saccharomyces cerevisiae ; Saccharomyces cerevisiae Proteins/metabolism ; Sequence Alignment ; Shigella flexneri/enzymology/*metabolism ; Signal Transduction ; Substrate Specificity ; Virulence ; Virulence Factors/*metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 13
    Publication Date: 2013-09-13
    Description: Reprogramming of adult cells to generate induced pluripotent stem cells (iPS cells) has opened new therapeutic opportunities; however, little is known about the possibility of in vivo reprogramming within tissues. Here we show that transitory induction of the four factors Oct4, Sox2, Klf4 and c-Myc in mice results in teratomas emerging from multiple organs, implying that full reprogramming can occur in vivo. Analyses of the stomach, intestine, pancreas and kidney reveal groups of dedifferentiated cells that express the pluripotency marker NANOG, indicative of in situ reprogramming. By bone marrow transplantation, we demonstrate that haematopoietic cells can also be reprogrammed in vivo. Notably, reprogrammable mice present circulating iPS cells in the blood and, at the transcriptome level, these in vivo generated iPS cells are closer to embryonic stem cells (ES cells) than standard in vitro generated iPS cells. Moreover, in vivo iPS cells efficiently contribute to the trophectoderm lineage, suggesting that they achieve a more plastic or primitive state than ES cells. Finally, intraperitoneal injection of in vivo iPS cells generates embryo-like structures that express embryonic and extraembryonic markers. We conclude that reprogramming in vivo is feasible and confers totipotency features absent in standard iPS or ES cells. These discoveries could be relevant for future applications of reprogramming in regenerative medicine.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Abad, Maria -- Mosteiro, Lluc -- Pantoja, Cristina -- Canamero, Marta -- Rayon, Teresa -- Ors, Inmaculada -- Grana, Osvaldo -- Megias, Diego -- Dominguez, Orlando -- Martinez, Dolores -- Manzanares, Miguel -- Ortega, Sagrario -- Serrano, Manuel -- England -- Nature. 2013 Oct 17;502(7471):340-5. doi: 10.1038/nature12586. Epub 2013 Sep 11.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Tumour Suppression Group, Spanish National Cancer Research Centre (CNIO), Madrid E-28029, Spain.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24025773" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Blood Cells/cytology/metabolism ; Cell Dedifferentiation ; Cell Separation ; Cells, Cultured ; *Cellular Reprogramming/genetics ; Ectoderm/cytology ; Embryoid Bodies/cytology/metabolism ; Embryonic Stem Cells/cytology/metabolism ; Female ; Fibroblasts/cytology ; Gene Expression Profiling ; Induced Pluripotent Stem Cells/*cytology/metabolism ; Intestines/cytology ; Kidney/cytology ; Kruppel-Like Transcription Factors/genetics/metabolism ; Male ; Mice ; Mice, Inbred C57BL ; Octamer Transcription Factor-3/genetics/metabolism ; Organ Specificity ; Pancreas/cytology ; Proto-Oncogene Proteins c-myc/genetics/metabolism ; SOXB1 Transcription Factors/genetics/metabolism ; Stomach/cytology ; Teratoma/genetics/*metabolism/pathology ; Totipotent Stem Cells/*cytology/metabolism ; Transcriptome/genetics ; Trophoblasts/cytology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 14
    Publication Date: 2013-09-21
    Description: Somatic cells can be inefficiently and stochastically reprogrammed into induced pluripotent stem (iPS) cells by exogenous expression of Oct4 (also called Pou5f1), Sox2, Klf4 and Myc (hereafter referred to as OSKM). The nature of the predominant rate-limiting barrier(s) preventing the majority of cells to successfully and synchronously reprogram remains to be defined. Here we show that depleting Mbd3, a core member of the Mbd3/NuRD (nucleosome remodelling and deacetylation) repressor complex, together with OSKM transduction and reprogramming in naive pluripotency promoting conditions, result in deterministic and synchronized iPS cell reprogramming (near 100% efficiency within seven days from mouse and human cells). Our findings uncover a dichotomous molecular function for the reprogramming factors, serving to reactivate endogenous pluripotency networks while simultaneously directly recruiting the Mbd3/NuRD repressor complex that potently restrains the reactivation of OSKM downstream target genes. Subsequently, the latter interactions, which are largely depleted during early pre-implantation development in vivo, lead to a stochastic and protracted reprogramming trajectory towards pluripotency in vitro. The deterministic reprogramming approach devised here offers a novel platform for the dissection of molecular dynamics leading to establishing pluripotency at unprecedented flexibility and resolution.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rais, Yoach -- Zviran, Asaf -- Geula, Shay -- Gafni, Ohad -- Chomsky, Elad -- Viukov, Sergey -- Mansour, Abed AlFatah -- Caspi, Inbal -- Krupalnik, Vladislav -- Zerbib, Mirie -- Maza, Itay -- Mor, Nofar -- Baran, Dror -- Weinberger, Leehee -- Jaitin, Diego A -- Lara-Astiaso, David -- Blecher-Gonen, Ronnie -- Shipony, Zohar -- Mukamel, Zohar -- Hagai, Tzachi -- Gilad, Shlomit -- Amann-Zalcenstein, Daniela -- Tanay, Amos -- Amit, Ido -- Novershtern, Noa -- Hanna, Jacob H -- England -- Nature. 2013 Oct 3;502(7469):65-70. doi: 10.1038/nature12587. Epub 2013 Sep 18.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Department of Molecular Genetics, Weizmann Institute of Science, Rehovot 76100, Israel.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24048479" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Cells, Cultured ; Cellular Reprogramming/genetics/*physiology ; DNA-Binding Proteins/genetics ; Embryonic Stem Cells ; Female ; Gene Expression Regulation ; HEK293 Cells ; Humans ; Induced Pluripotent Stem Cells/*physiology ; Male ; Mice ; *Models, Biological ; Transcription Factors/genetics
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 15
    facet.materialart.
    Unknown
    Nature Publishing Group (NPG)
    Publication Date: 2013-05-24
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Morange, Michel -- England -- Nature. 2013 May 23;497(7450):440. doi: 10.1038/497440a.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Cavailles Centre, CIRPHLES, USR 3308 for the History and Philosophy of Science, Ecole Normale Superieure, Paris, France. morange@biologie.ens.fr〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23698437" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Conjugation, Genetic ; France ; History, 20th Century ; Humans ; Mice ; Molecular Biology/*history ; Nobel Prize ; Operon/genetics
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 16
    Publication Date: 2013-01-29
    Description: Insulin resistance is a fundamental pathogenic factor present in various metabolic disorders including obesity and type 2 diabetes. Although skeletal muscle accounts for 70-90% of insulin-stimulated glucose disposal, the mechanism underlying muscle insulin resistance is poorly understood. Here we show in mice that muscle-specific mitsugumin 53 (MG53; also called TRIM72) mediates the degradation of the insulin receptor and insulin receptor substrate 1 (IRS1), and when upregulated, causes metabolic syndrome featuring insulin resistance, obesity, hypertension and dyslipidaemia. MG53 expression is markedly elevated in models of insulin resistance, and MG53 overexpression suffices to trigger muscle insulin resistance and metabolic syndrome sequentially. Conversely, ablation of MG53 prevents diet-induced metabolic syndrome by preserving the insulin receptor, IRS1 and insulin signalling integrity. Mechanistically, MG53 acts as an E3 ligase targeting the insulin receptor and IRS1 for ubiquitin-dependent degradation, comprising a central mechanism controlling insulin signal strength in skeletal muscle. These findings define MG53 as a novel therapeutic target for treating metabolic disorders and associated cardiovascular complications.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Song, Ruisheng -- Peng, Wei -- Zhang, Yan -- Lv, Fengxiang -- Wu, Hong-Kun -- Guo, Jiaojiao -- Cao, Yongxing -- Pi, Yanbin -- Zhang, Xin -- Jin, Li -- Zhang, Mao -- Jiang, Peng -- Liu, Fenghua -- Meng, Shaoshuai -- Zhang, Xiuqin -- Jiang, Ping -- Cao, Chun-Mei -- Xiao, Rui-Ping -- England -- Nature. 2013 Feb 21;494(7437):375-9. doi: 10.1038/nature11834. Epub 2013 Jan 27.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Molecular Medicine, State Key Laboratory of Biomembrane and Membrane Biotechnology, Peking University, Beijing 100871, China.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23354051" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Carrier Proteins/genetics/*metabolism ; Diabetes Mellitus, Type 2 ; Diet, High-Fat ; Dyslipidemias/metabolism ; Gene Deletion ; Hypertension/metabolism ; *Insulin/metabolism ; Insulin Receptor Substrate Proteins/metabolism ; Insulin Resistance/genetics/*physiology ; Male ; Metabolic Syndrome X/enzymology/genetics/*metabolism/prevention & control ; Mice ; Obesity/chemically induced/metabolism ; Rats ; Rats, Inbred SHR ; Rats, Inbred WKY ; Receptor, Insulin/metabolism ; Signal Transduction ; Ubiquitin-Protein Ligases/*metabolism ; Ubiquitination
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 17
    facet.materialart.
    Unknown
    Nature Publishing Group (NPG)
    Publication Date: 2013-07-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Abbott, Alison -- England -- Nature. 2013 Jul 25;499(7459):390. doi: 10.1038/499390a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23887410" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Separation ; *Cell Size ; Embryo, Mammalian/cytology ; Humans ; Mice ; Reproducibility of Results ; Stem Cell Transplantation ; Stem Cells/*cytology ; *Uncertainty
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 18
    Publication Date: 2013-06-19
    Description: Rett syndrome (RTT) is an X-linked human neurodevelopmental disorder with features of autism and severe neurological dysfunction in females. RTT is caused by mutations in methyl-CpG-binding protein 2 (MeCP2), a nuclear protein that, in neurons, regulates transcription, is expressed at high levels similar to that of histones, and binds to methylated cytosines broadly across the genome. By phosphotryptic mapping, we identify three sites (S86, S274 and T308) of activity-dependent MeCP2 phosphorylation. Phosphorylation of these sites is differentially induced by neuronal activity, brain-derived neurotrophic factor, or agents that elevate the intracellular level of 3',5'-cyclic AMP (cAMP), indicating that MeCP2 may function as an epigenetic regulator of gene expression that integrates diverse signals from the environment. Here we show that the phosphorylation of T308 blocks the interaction of the repressor domain of MeCP2 with the nuclear receptor co-repressor (NCoR) complex and suppresses the ability of MeCP2 to repress transcription. In knock-in mice bearing the common human RTT missense mutation R306C, neuronal activity fails to induce MeCP2 T308 phosphorylation, suggesting that the loss of T308 phosphorylation might contribute to RTT. Consistent with this possibility, the mutation of MeCP2 T308A in mice leads to a decrease in the induction of a subset of activity-regulated genes and to RTT-like symptoms. These findings indicate that the activity-dependent phosphorylation of MeCP2 at T308 regulates the interaction of MeCP2 with the NCoR complex, and that RTT in humans may be due, in part, to the loss of activity-dependent MeCP2 T308 phosphorylation and a disruption of the phosphorylation-regulated interaction of MeCP2 with the NCoR complex.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3922283/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3922283/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ebert, Daniel H -- Gabel, Harrison W -- Robinson, Nathaniel D -- Kastan, Nathaniel R -- Hu, Linda S -- Cohen, Sonia -- Navarro, Adrija J -- Lyst, Matthew J -- Ekiert, Robert -- Bird, Adrian P -- Greenberg, Michael E -- 092076/Wellcome Trust/United Kingdom -- K08 MH090306/MH/NIMH NIH HHS/ -- K08MH90306/MH/NIMH NIH HHS/ -- P30 HD018655/HD/NICHD NIH HHS/ -- P30-HD 18655/HD/NICHD NIH HHS/ -- R01 NS048276/NS/NINDS NIH HHS/ -- R01NS048276/NS/NINDS NIH HHS/ -- T32 GM007753/GM/NIGMS NIH HHS/ -- England -- Nature. 2013 Jul 18;499(7458):341-5. doi: 10.1038/nature12348.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurobiology, Harvard Medical School, and Department of Psychiatry, Massachusetts General Hospital, Boston, Massachusetts 02114, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23770587" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cells, Cultured ; Co-Repressor Proteins/*metabolism ; Humans ; Methyl-CpG-Binding Protein 2/chemistry/genetics/*metabolism ; Mice ; Mutation ; Neurons/metabolism ; Phosphorylation ; Rett Syndrome/genetics ; Threonine/*metabolism ; Transcription, Genetic
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 19
    Publication Date: 2013-06-04
    Description: Rev-Erb-alpha and Rev-Erb-beta are nuclear receptors that regulate the expression of genes involved in the control of circadian rhythm, metabolism and inflammatory responses. Rev-Erbs function as transcriptional repressors by recruiting nuclear receptor co-repressor (NCoR)-HDAC3 complexes to Rev-Erb response elements in enhancers and promoters of target genes, but the molecular basis for cell-specific programs of repression is not known. Here we present evidence that in mouse macrophages Rev-Erbs regulate target gene expression by inhibiting the functions of distal enhancers that are selected by macrophage-lineage-determining factors, thereby establishing a macrophage-specific program of repression. Remarkably, the repressive functions of Rev-Erbs are associated with their ability to inhibit the transcription of enhancer-derived RNAs (eRNAs). Furthermore, targeted degradation of eRNAs at two enhancers subject to negative regulation by Rev-Erbs resulted in reduced expression of nearby messenger RNAs, suggesting a direct role of these eRNAs in enhancer function. By precisely defining eRNA start sites using a modified form of global run-on sequencing that quantifies nascent 5' ends, we show that transfer of full enhancer activity to a target promoter requires both the sequences mediating transcription-factor binding and the specific sequences encoding the eRNA transcript. These studies provide evidence for a direct role of eRNAs in contributing to enhancer functions and suggest that Rev-Erbs act to suppress gene expression at a distance by repressing eRNA transcription.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3839578/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3839578/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lam, Michael T Y -- Cho, Han -- Lesch, Hanna P -- Gosselin, David -- Heinz, Sven -- Tanaka-Oishi, Yumiko -- Benner, Christopher -- Kaikkonen, Minna U -- Kim, Aneeza S -- Kosaka, Mika -- Lee, Cindy Y -- Watt, Andy -- Grossman, Tamar R -- Rosenfeld, Michael G -- Evans, Ronald M -- Glass, Christopher K -- CA014195/CA/NCI NIH HHS/ -- CA17390/CA/NCI NIH HHS/ -- CA52599/CA/NCI NIH HHS/ -- DK057978/DK/NIDDK NIH HHS/ -- DK063491/DK/NIDDK NIH HHS/ -- DK091183/DK/NIDDK NIH HHS/ -- HL088093/HL/NHLBI NIH HHS/ -- HL105278/HL/NHLBI NIH HHS/ -- P01 DK074868/DK/NIDDK NIH HHS/ -- P01 HL088093/HL/NHLBI NIH HHS/ -- P30 CA014195/CA/NCI NIH HHS/ -- P30 DK063491/DK/NIDDK NIH HHS/ -- R01 CA052599/CA/NCI NIH HHS/ -- R01 CA173903/CA/NCI NIH HHS/ -- R01 DK018477/DK/NIDDK NIH HHS/ -- R01 DK091183/DK/NIDDK NIH HHS/ -- R01 HL105278/HL/NHLBI NIH HHS/ -- R37 DK057978/DK/NIDDK NIH HHS/ -- T32 GM007198-37/GM/NIGMS NIH HHS/ -- T32 GM008666/GM/NIGMS NIH HHS/ -- U19 DK062434/DK/NIDDK NIH HHS/ -- U19DK62434/DK/NIDDK NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2013 Jun 27;498(7455):511-5. doi: 10.1038/nature12209. Epub 2013 Jun 2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cellular and Molecular Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23728303" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Animals ; Base Sequence ; Binding Sites ; Down-Regulation/*genetics ; Enhancer Elements, Genetic/*genetics ; Gene Knockdown Techniques ; Macrophages/*metabolism ; Mice ; Nuclear Receptor Subfamily 1, Group D, Member 1/deficiency/genetics/*metabolism ; Organ Specificity ; Promoter Regions, Genetic/genetics ; RNA, Messenger/genetics/metabolism ; Response Elements/genetics ; Transcription, Genetic/*genetics
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 20
    Publication Date: 2013-08-02
    Description: More than 130 million people worldwide chronically infected with hepatitis C virus (HCV) are at risk of developing severe liver disease. Antiviral treatments are only partially effective against HCV infection, and a vaccine is not available. Development of more efficient therapies has been hampered by the lack of a small animal model. Building on the observation that CD81 and occludin (OCLN) comprise the minimal set of human factors required to render mouse cells permissive to HCV entry, we previously showed that transient expression of these two human genes is sufficient to allow viral uptake into fully immunocompetent inbred mice. Here we demonstrate that transgenic mice stably expressing human CD81 and OCLN also support HCV entry, but innate and adaptive immune responses restrict HCV infection in vivo. Blunting antiviral immunity in genetically humanized mice infected with HCV results in measurable viraemia over several weeks. In mice lacking the essential cellular co-factor cyclophilin A (CypA), HCV RNA replication is markedly diminished, providing genetic evidence that this process is faithfully recapitulated. Using a cell-based fluorescent reporter activated by the NS3-4A protease we visualize HCV infection in single hepatocytes in vivo. Persistently infected mice produce de novo infectious particles, which can be inhibited with directly acting antiviral drug treatment, thereby providing evidence for the completion of the entire HCV life cycle in inbred mice. This genetically humanized mouse model opens new opportunities to dissect genetically HCV infection in vivo and provides an important preclinical platform for testing and prioritizing drug candidates and may also have utility for evaluating vaccine efficacy.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3858853/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3858853/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dorner, Marcus -- Horwitz, Joshua A -- Donovan, Bridget M -- Labitt, Rachael N -- Budell, William C -- Friling, Tamar -- Vogt, Alexander -- Catanese, Maria Teresa -- Satoh, Takashi -- Kawai, Taro -- Akira, Shizuo -- Law, Mansun -- Rice, Charles M -- Ploss, Alexander -- R01 AI072613/AI/NIAID NIH HHS/ -- R01 AI079031/AI/NIAID NIH HHS/ -- R01 AI099284/AI/NIAID NIH HHS/ -- R01 AI107301/AI/NIAID NIH HHS/ -- R01 CA057973/CA/NCI NIH HHS/ -- R01AI072613/AI/NIAID NIH HHS/ -- R01AI079031/AI/NIAID NIH HHS/ -- R01AI099284/AI/NIAID NIH HHS/ -- R01CA057973/CA/NCI NIH HHS/ -- RC1 DK087193/DK/NIDDK NIH HHS/ -- RC1DK087193/DK/NIDDK NIH HHS/ -- England -- Nature. 2013 Sep 12;501(7466):237-41. doi: 10.1038/nature12427. Epub 2013 Jul 31.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for the Study of Hepatitis C, The Rockefeller University, New York, New York 10065, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23903655" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, CD81/genetics/metabolism ; Cell Line ; Cyclophilin A/genetics/metabolism ; *Disease Models, Animal ; *Genetic Engineering ; Hepacivirus/immunology/*physiology ; Hepatitis C/*genetics/immunology/*virology ; Humans ; Mice ; Mice, Inbred C57BL ; Mice, Transgenic ; Occludin/genetics/metabolism ; STAT1 Transcription Factor/deficiency ; Viremia/virology ; Virion/growth & development/physiology ; *Virus Replication
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 21
    Publication Date: 2013-05-31
    Description: Defining mechanisms by which Plasmodium virulence is regulated is central to understanding the pathogenesis of human malaria. Serial blood passage of Plasmodium through rodents, primates or humans increases parasite virulence, suggesting that vector transmission regulates Plasmodium virulence within the mammalian host. In agreement, disease severity can be modified by vector transmission, which is assumed to 'reset' Plasmodium to its original character. However, direct evidence that vector transmission regulates Plasmodium virulence is lacking. Here we use mosquito transmission of serially blood passaged (SBP) Plasmodium chabaudi chabaudi to interrogate regulation of parasite virulence. Analysis of SBP P. c. chabaudi before and after mosquito transmission demonstrates that vector transmission intrinsically modifies the asexual blood-stage parasite, which in turn modifies the elicited mammalian immune response, which in turn attenuates parasite growth and associated pathology. Attenuated parasite virulence associates with modified expression of the pir multi-gene family. Vector transmission of Plasmodium therefore regulates gene expression of probable variant antigens in the erythrocytic cycle, modifies the elicited mammalian immune response, and thus regulates parasite virulence. These results place the mosquito at the centre of our efforts to dissect mechanisms of protective immunity to malaria for the development of an effective vaccine.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3784817/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3784817/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Spence, Philip J -- Jarra, William -- Levy, Prisca -- Reid, Adam J -- Chappell, Lia -- Brugat, Thibaut -- Sanders, Mandy -- Berriman, Matthew -- Langhorne, Jean -- 085775/Wellcome Trust/United Kingdom -- 089553/Wellcome Trust/United Kingdom -- 098051/Wellcome Trust/United Kingdom -- MC_U117584248/Medical Research Council/United Kingdom -- U.1175.02.004.00004(60507)/Medical Research Council/United Kingdom -- U117584248/Medical Research Council/United Kingdom -- England -- Nature. 2013 Jun 13;498(7453):228-31. doi: 10.1038/nature12231. Epub 2013 May 29.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Parasitology, MRC National Institute for Medical Research, Mill Hill, London NW7 1AA, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23719378" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Culicidae/*parasitology ; Erythrocytes/parasitology ; Host-Parasite Interactions/*immunology ; Insect Vectors/*parasitology ; Malaria/immunology/parasitology/transmission ; Malaria Vaccines/immunology ; Mice ; Mice, Inbred C57BL ; Plasmodium chabaudi/growth & development/*immunology/isolation & ; purification/*pathogenicity ; Serial Passage ; Virulence/immunology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 22
    Publication Date: 2013-05-28
    Description: Neutrophil recruitment from blood to extravascular sites of sterile or infectious tissue damage is a hallmark of early innate immune responses, and the molecular events leading to cell exit from the bloodstream have been well defined. Once outside the vessel, individual neutrophils often show extremely coordinated chemotaxis and cluster formation reminiscent of the swarming behaviour of insects. The molecular players that direct this response at the single-cell and population levels within the complexity of an inflamed tissue are unknown. Using two-photon intravital microscopy in mouse models of sterile injury and infection, we show a critical role for intercellular signal relay among neutrophils mediated by the lipid leukotriene B4, which acutely amplifies local cell death signals to enhance the radius of highly directed interstitial neutrophil recruitment. Integrin receptors are dispensable for long-distance migration, but have a previously unappreciated role in maintaining dense cellular clusters when congregating neutrophils rearrange the collagenous fibre network of the dermis to form a collagen-free zone at the wound centre. In this newly formed environment, integrins, in concert with neutrophil-derived leukotriene B4 and other chemoattractants, promote local neutrophil interaction while forming a tight wound seal. This wound seal has borders that cease to grow in kinetic concert with late recruitment of monocytes and macrophages at the edge of the displaced collagen fibres. Together, these data provide an initial molecular map of the factors that contribute to neutrophil swarming in the extravascular space of a damaged tissue. They reveal how local events are propagated over large-range distances, and how auto-signalling produces coordinated, self-organized neutrophil-swarming behaviour that isolates the wound or infectious site from surrounding viable tissue.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3879961/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3879961/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lammermann, Tim -- Afonso, Philippe V -- Angermann, Bastian R -- Wang, Ji Ming -- Kastenmuller, Wolfgang -- Parent, Carole A -- Germain, Ronald N -- ZIA AI000545-24/Intramural NIH HHS/ -- England -- Nature. 2013 Jun 20;498(7454):371-5. doi: 10.1038/nature12175. Epub 2013 May 26.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Systems Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892-0421, USA. laemmermannt@niaid.nih.gov〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23708969" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Death ; Chemotactic Factors/immunology/*metabolism ; *Chemotaxis, Leukocyte/immunology ; Collagen/metabolism ; Female ; Immunity, Innate ; Integrins/*metabolism ; Leukotriene B4/immunology/*metabolism ; Lymph Nodes/cytology/immunology ; Macrophages/cytology/microbiology/pathology ; Male ; Mice ; *Neutrophil Infiltration ; Neutrophils/*cytology/physiology ; Pseudomonas aeruginosa/pathogenicity ; Receptors, G-Protein-Coupled/metabolism ; Skin/cytology/injuries/pathology ; Wound Healing/*physiology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 23
    Publication Date: 2013-10-15
    Description: The mechanisms by which genetic variation affects transcription regulation and phenotypes at the nucleotide level are incompletely understood. Here we use natural genetic variation as an in vivo mutagenesis screen to assess the genome-wide effects of sequence variation on lineage-determining and signal-specific transcription factor binding, epigenomics and transcriptional outcomes in primary macrophages from different mouse strains. We find substantial genetic evidence to support the concept that lineage-determining transcription factors define epigenetic and transcriptomic states by selecting enhancer-like regions in the genome in a collaborative fashion and facilitating binding of signal-dependent factors. This hierarchical model of transcription factor function suggests that limited sets of genomic data for lineage-determining transcription factors and informative histone modifications can be used for the prioritization of disease-associated regulatory variants.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3994126/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3994126/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Heinz, S -- Romanoski, C E -- Benner, C -- Allison, K A -- Kaikkonen, M U -- Orozco, L D -- Glass, C K -- 5T32DK007494/DK/NIDDK NIH HHS/ -- CA17390/CA/NCI NIH HHS/ -- DK063491/DK/NIDDK NIH HHS/ -- DK091183/DK/NIDDK NIH HHS/ -- P01 DK074868/DK/NIDDK NIH HHS/ -- P30 CA023100/CA/NCI NIH HHS/ -- P30 DK063491/DK/NIDDK NIH HHS/ -- R01 CA173903/CA/NCI NIH HHS/ -- R01 DK091183/DK/NIDDK NIH HHS/ -- T32 AR059033/AR/NIAMS NIH HHS/ -- England -- Nature. 2013 Nov 28;503(7477):487-92. doi: 10.1038/nature12615. Epub 2013 Oct 13.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] Department of Cellular and Molecular Medicine, University of California, San Diego, 9500 Gilman Drive, Mail Code 0651, La Jolla, California 92093, USA [2].〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24121437" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Motifs/genetics ; Animals ; Base Sequence ; Cell Lineage/genetics ; DNA-Binding Proteins/metabolism ; Enhancer Elements, Genetic/*genetics ; Gene Expression Regulation/*genetics ; Genetic Variation/*genetics ; Histones/chemistry/metabolism ; Macrophages/metabolism ; Male ; Mice ; Mice, Inbred BALB C ; Mice, Inbred C57BL ; Models, Biological ; Mutation/genetics ; NF-kappa B/metabolism ; Protein Binding ; Reproducibility of Results ; Selection, Genetic/*genetics ; Transcription Factor RelA/metabolism ; Transcription Factors/*metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 24
    Publication Date: 2013-10-22
    Description: Influenza A virus-specific B lymphocytes and the antibodies they produce protect against infection. However, the outcome of interactions between an influenza haemagglutinin-specific B cell via its receptor (BCR) and virus is unclear. Through somatic cell nuclear transfer we generated mice that harbour B cells with a BCR specific for the haemagglutinin of influenza A/WSN/33 virus (FluBI mice). Their B cells secrete an immunoglobulin gamma 2b that neutralizes infectious virus. Whereas B cells from FluBI and control mice bind equivalent amounts of virus through interaction of haemagglutinin with surface-disposed sialic acids, the A/WSN/33 virus infects only the haemagglutinin-specific B cells. Mere binding of virus is not sufficient for infection of B cells: this requires interactions of the BCR with haemagglutinin, causing both disruption of antibody secretion and FluBI B-cell death within 18 h. In mice infected with A/WSN/33, lung-resident FluBI B cells are infected by the virus, thus delaying the onset of protective antibody release into the lungs, whereas FluBI cells in the draining lymph node are not infected and proliferate. We propose that influenza targets and kills influenza-specific B cells in the lung, thus allowing the virus to gain purchase before the initiation of an effective adaptive response.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3863936/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3863936/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dougan, Stephanie K -- Ashour, Joseph -- Karssemeijer, Roos A -- Popp, Maximilian W -- Avalos, Ana M -- Barisa, Marta -- Altenburg, Arwen F -- Ingram, Jessica R -- Cragnolini, Juan Jose -- Guo, Chunguang -- Alt, Frederick W -- Jaenisch, Rudolf -- Ploegh, Hidde L -- DP1 GM106409/GM/NIGMS NIH HHS/ -- R01 AI033456/AI/NIAID NIH HHS/ -- R01 AI087879/AI/NIAID NIH HHS/ -- R01 GM100518/GM/NIGMS NIH HHS/ -- R01 HD045022/HD/NICHD NIH HHS/ -- R37 HD045022/HD/NICHD NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2013 Nov 21;503(7476):406-9. doi: 10.1038/nature12637. Epub 2013 Oct 20.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] Whitehead Institute for Biomedical Research, 9 Cambridge Center, Cambridge, Massachusetts 02142, USA [2].〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24141948" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies/immunology/metabolism ; Antibody Specificity/immunology ; B-Lymphocytes/*immunology/pathology/secretion/*virology ; Cell Death ; Female ; Hemagglutinin Glycoproteins, Influenza Virus/immunology/metabolism ; Immunoglobulin G/immunology/metabolism ; Lung/cytology/immunology/secretion/virology ; Lymph Nodes/cytology/immunology ; Male ; Mice ; Mice, Inbred C57BL ; Molecular Sequence Data ; Neutralization Tests ; Nuclear Transfer Techniques ; Orthomyxoviridae/pathogenicity/*physiology ; Receptors, Antigen, B-Cell/*immunology/metabolism ; Virus Replication
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 25
    Publication Date: 2013-12-18
    Description: Fibroblasts are the major mesenchymal cell type in connective tissue and deposit the collagen and elastic fibres of the extracellular matrix (ECM). Even within a single tissue, fibroblasts exhibit considerable functional diversity, but it is not known whether this reflects the existence of a differentiation hierarchy or is a response to different environmental factors. Here we show, using transplantation assays and lineage tracing in mice, that the fibroblasts of skin connective tissue arise from two distinct lineages. One forms the upper dermis, including the dermal papilla that regulates hair growth and the arrector pili muscle, which controls piloerection. The other forms the lower dermis, including the reticular fibroblasts that synthesize the bulk of the fibrillar ECM, and the preadipocytes and adipocytes of the hypodermis. The upper lineage is required for hair follicle formation. In wounded adult skin, the initial wave of dermal repair is mediated by the lower lineage and upper dermal fibroblasts are recruited only during re-epithelialization. Epidermal beta-catenin activation stimulates the expansion of the upper dermal lineage, rendering wounds permissive for hair follicle formation. Our findings explain why wounding is linked to formation of ECM-rich scar tissue that lacks hair follicles. They also form a platform for discovering fibroblast lineages in other tissues and for examining fibroblast changes in ageing and disease.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3868929/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3868929/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Driskell, Ryan R -- Lichtenberger, Beate M -- Hoste, Esther -- Kretzschmar, Kai -- Simons, Ben D -- Charalambous, Marika -- Ferron, Sacri R -- Herault, Yann -- Pavlovic, Guillaume -- Ferguson-Smith, Anne C -- Watt, Fiona M -- 079249/Wellcome Trust/United Kingdom -- 092096/Wellcome Trust/United Kingdom -- 095606/Wellcome Trust/United Kingdom -- 096540/Wellcome Trust/United Kingdom -- 098357/Wellcome Trust/United Kingdom -- G0600796/Medical Research Council/United Kingdom -- Department of Health/United Kingdom -- Medical Research Council/United Kingdom -- Wellcome Trust/United Kingdom -- England -- Nature. 2013 Dec 12;504(7479):277-81. doi: 10.1038/nature12783.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] Wellcome Trust Centre for Stem Cell Research, University of Cambridge, Cambridge CB2 1QR, UK [2] Centre for Stem Cells and Regenerative Medicine, King's College London, 28th floor, Tower Wing, Guy's Hospital, London SE1 9RT, UK. ; 1] Wellcome Trust Centre for Stem Cell Research, University of Cambridge, Cambridge CB2 1QR, UK [2] Centre for Stem Cells and Regenerative Medicine, King's College London, 28th floor, Tower Wing, Guy's Hospital, London SE1 9RT, UK [3]. ; 1] Centre for Stem Cells and Regenerative Medicine, King's College London, 28th floor, Tower Wing, Guy's Hospital, London SE1 9RT, UK [2] Cancer Research UK Cambridge Research Institute, Li Ka Shing Centre, Robinson Way, Cambridge CB2 0RE, UK [3]. ; Department of Physics, Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, UK. ; Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge CB2 3EG, UK. ; Institut Clinique de la Souris, Parc d'Innovation, 67404 Illkrich-Graffenstaden, Cedex, France. ; Centre for Stem Cells and Regenerative Medicine, King's College London, 28th floor, Tower Wing, Guy's Hospital, London SE1 9RT, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24336287" target="_blank"〉PubMed〈/a〉
    Keywords: Adipocytes/cytology/metabolism ; Animals ; *Cell Lineage ; Dermis/anatomy & histology/cytology/embryology/growth & development ; Female ; Fibroblasts/*cytology/transplantation ; Hair Follicle/cytology/metabolism ; In Vitro Techniques ; Male ; Mice ; Mice, Inbred C57BL ; Mice, Inbred CBA ; Mice, Transgenic ; Muscle, Smooth/cytology/metabolism ; Skin/anatomy & histology/*cytology/embryology/*growth & development ; Wound Healing/*physiology ; beta Catenin/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 26
    Publication Date: 2013-06-01
    Description: Detection of cytoplasmic DNA represents one of the most fundamental mechanisms of the innate immune system to sense the presence of microbial pathogens. Moreover, erroneous detection of endogenous DNA by the same sensing mechanisms has an important pathophysiological role in certain sterile inflammatory conditions. The endoplasmic-reticulum-resident protein STING is critically required for the initiation of type I interferon signalling upon detection of cytosolic DNA of both exogenous and endogenous origin. Next to its pivotal role in DNA sensing, STING also serves as a direct receptor for the detection of cyclic dinucleotides, which function as second messenger molecules in bacteria. DNA recognition, however, is triggered in an indirect fashion that depends on a recently characterized cytoplasmic nucleotidyl transferase, termed cGAMP synthase (cGAS), which upon interaction with DNA synthesizes a dinucleotide molecule that in turn binds to and activates STING. We here show in vivo and in vitro that the cGAS-catalysed reaction product is distinct from previously characterized cyclic dinucleotides. Using a combinatorial approach based on mass spectrometry, enzymatic digestion, NMR analysis and chemical synthesis we demonstrate that cGAS produces a cyclic GMP-AMP dinucleotide, which comprises a 2'-5' and a 3'-5' phosphodiester linkage 〉Gp(2'-5')Ap(3'-5')〉. We found that the presence of this 2'-5' linkage was required to exert potent activation of human STING. Moreover, we show that cGAS first catalyses the synthesis of a linear 2'-5'-linked dinucleotide, which is then subject to cGAS-dependent cyclization in a second step through a 3'-5' phosphodiester linkage. This 13-membered ring structure defines a novel class of second messenger molecules, extending the family of 2'-5'-linked antiviral biomolecules.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4143541/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4143541/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ablasser, Andrea -- Goldeck, Marion -- Cavlar, Taner -- Deimling, Tobias -- Witte, Gregor -- Rohl, Ingo -- Hopfner, Karl-Peter -- Ludwig, Janos -- Hornung, Veit -- 243046/European Research Council/International -- U19AI083025/AI/NIAID NIH HHS/ -- England -- Nature. 2013 Jun 20;498(7454):380-4. doi: 10.1038/nature12306. Epub 2013 May 30.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute for Clinical Chemistry and Clinical Pharmacology, University Hospital, University of Bonn, 53127 Bonn, Germany. andrea.ablasser@uni-bonn.de〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23722158" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Monophosphate/chemistry ; Animals ; Biocatalysis ; Cell Line ; Cyclic GMP/chemistry ; Cyclization ; HEK293 Cells ; Humans ; Magnetic Resonance Spectroscopy ; Membrane Proteins/*metabolism ; Mice ; Models, Molecular ; Molecular Structure ; Nucleotidyltransferases/genetics/*metabolism ; Oligoribonucleotides/biosynthesis/chemistry/*metabolism ; Second Messenger Systems/*physiology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 27
    Publication Date: 2013-10-01
    Description: The innate immune defence of multicellular organisms against microbial pathogens requires cellular collaboration. Information exchange allowing immune cells to collaborate is generally attributed to soluble protein factors secreted by pathogen-sensing cells. Cytokines, such as type I interferons (IFNs), serve to alert non-infected cells to the possibility of pathogen challenge. Moreover, in conjunction with chemokines they can instruct specialized immune cells to contain and eradicate microbial infection. Several receptors and signalling pathways exist that couple pathogen sensing to the induction of cytokines, whereas cytosolic recognition of nucleic acids seems to be exquisitely important for the activation of type I IFNs, master regulators of antiviral immunity. Cytosolic DNA is sensed by the receptor cyclic GMP-AMP (cGAMP) synthase (cGAS), which catalyses the synthesis of the second messenger cGAMP(2'-5'). This molecule in turn activates the endoplasmic reticulum (ER)-resident receptor STING, thereby inducing an antiviral state and the secretion of type I IFNs. Here we find in murine and human cells that cGAS-synthesized cGAMP(2'-5') is transferred from producing cells to neighbouring cells through gap junctions, where it promotes STING activation and thus antiviral immunity independently of type I IFN signalling. In line with the limited cargo specificity of connexins, the proteins that assemble gap junction channels, most connexins tested were able to confer this bystander immunity, thus indicating a broad physiological relevance of this local immune collaboration. Collectively, these observations identify cGAS-triggered cGAMP(2'-5') transfer as a novel host strategy that serves to rapidly convey antiviral immunity in a transcription-independent, horizontal manner.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4142317/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4142317/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ablasser, Andrea -- Schmid-Burgk, Jonathan L -- Hemmerling, Inga -- Horvath, Gabor L -- Schmidt, Tobias -- Latz, Eicke -- Hornung, Veit -- 243046/European Research Council/International -- England -- Nature. 2013 Nov 28;503(7477):530-4. doi: 10.1038/nature12640. Epub 2013 Sep 29.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute for Clinical Chemistry and Clinical Pharmacology, University Hospital, University of Bonn, 53127 Bonn, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24077100" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bystander Effect/*immunology ; *Cell Communication ; Cytosol/metabolism ; DNA/metabolism ; Gap Junctions/metabolism ; HEK293 Cells ; Humans ; Immunity, Innate/*immunology ; Membrane Proteins/metabolism ; Mice ; Nucleotides, Cyclic/*metabolism ; Nucleotidyltransferases/metabolism ; Second Messenger Systems ; Vaccinia virus/immunology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 28
    Publication Date: 2013-03-15
    Description: To maintain lifelong production of blood cells, haematopoietic stem cells (HSCs) are tightly regulated by inherent programs and extrinsic regulatory signals received from their microenvironmental niche. Long-term repopulating HSCs reside in several, perhaps overlapping, niches that produce regulatory molecules and signals necessary for homeostasis and for increased output after stress or injury. Despite considerable advances in the specific cellular or molecular mechanisms governing HSC-niche interactions, little is known about the regulatory function in the intact mammalian haematopoietic niche. Recently, we and others described a positive regulatory role for prostaglandin E2 (PGE2) on HSC function ex vivo. Here we show that inhibition of endogenous PGE2 by non-steroidal anti-inflammatory drug (NSAID) treatment in mice results in modest HSC egress from the bone marrow. Surprisingly, this was independent of the SDF-1-CXCR4 axis implicated in stem-cell migration. Stem and progenitor cells were found to have differing mechanisms of egress, with HSC transit to the periphery dependent on niche attenuation and reduction in the retentive molecule osteopontin. Haematopoietic grafts mobilized with NSAIDs had superior repopulating ability and long-term engraftment. Treatment of non-human primates and healthy human volunteers confirmed NSAID-mediated egress in other species. PGE2 receptor knockout mice demonstrated that progenitor expansion and stem/progenitor egress resulted from reduced E-prostanoid 4 (EP4) receptor signalling. These results not only uncover unique regulatory roles for EP4 signalling in HSC retention in the niche, but also define a rapidly translatable strategy to enhance transplantation therapeutically.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3606692/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3606692/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hoggatt, Jonathan -- Mohammad, Khalid S -- Singh, Pratibha -- Hoggatt, Amber F -- Chitteti, Brahmananda R -- Speth, Jennifer M -- Hu, Peirong -- Poteat, Bradley A -- Stilger, Kayla N -- Ferraro, Francesca -- Silberstein, Lev -- Wong, Frankie K -- Farag, Sherif S -- Czader, Magdalena -- Milne, Ginger L -- Breyer, Richard M -- Serezani, Carlos H -- Scadden, David T -- Guise, Theresa A -- Srour, Edward F -- Pelus, Louis M -- CA069158/CA/NCI NIH HHS/ -- CA143057/CA/NCI NIH HHS/ -- DK07519/DK/NIDDK NIH HHS/ -- DK37097/DK/NIDDK NIH HHS/ -- HL07910/HL/NHLBI NIH HHS/ -- HL087735/HL/NHLBI NIH HHS/ -- HL096305/HL/NHLBI NIH HHS/ -- HL100402/HL/NHLBI NIH HHS/ -- P01 DK090948/DK/NIDDK NIH HHS/ -- P30 CA082709/CA/NCI NIH HHS/ -- R01 HL044851/HL/NHLBI NIH HHS/ -- R01 HL096305/HL/NHLBI NIH HHS/ -- England -- Nature. 2013 Mar 21;495(7441):365-9. doi: 10.1038/nature11929. Epub 2013 Mar 13.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, Indiana 46202, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23485965" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anti-Inflammatory Agents, Non-Steroidal/pharmacology ; Cell Count ; Cell Movement/physiology ; Cells, Cultured ; Dinoprostone/*metabolism ; Hematopoietic Stem Cell Mobilization ; Hematopoietic Stem Cells/*cytology/drug effects ; Heterocyclic Compounds/pharmacology ; Humans ; Mice ; Mice, Inbred C57BL ; Mice, Knockout ; Osteopontin/genetics ; Papio ; Receptors, Prostaglandin E, EP4 Subtype/genetics/metabolism ; Stem Cells/*cytology/drug effects ; Thiazines/pharmacology ; Thiazoles/pharmacology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 29
    Publication Date: 2013-08-06
    Description: The germ-cell lineage ensures the continuity of life through the generation of male and female gametes, which unite to form a totipotent zygote. We have previously demonstrated that, by using cytokines, embryonic stem cells and induced pluripotent stem cells can be induced into epiblast-like cells (EpiLCs) and then into primordial germ cell (PGC)-like cells with the capacity for both spermatogenesis and oogenesis, creating an opportunity for understanding and regulating mammalian germ-cell development in both sexes in vitro. Here we show that, without cytokines, simultaneous overexpression of three transcription factors, Blimp1 (also known as Prdm1), Prdm14 and Tfap2c (also known as AP2gamma), directs EpiLCs, but not embryonic stem cells, swiftly and efficiently into a PGC state. Notably, Prdm14 alone, but not Blimp1 or Tfap2c, suffices for the induction of the PGC state in EpiLCs. The transcription-factor-induced PGC state, irrespective of the transcription factors used, reconstitutes key transcriptome and epigenetic reprogramming in PGCs, but bypasses a mesodermal program that accompanies PGC or PGC-like-cell specification by cytokines including bone morphogenetic protein 4. Notably, the transcription-factor-induced PGC-like cells contribute to spermatogenesis and fertile offspring. Our findings provide a new insight into the transcriptional logic for PGC specification, and create a foundation for the transcription-factor-based reconstitution and regulation of mammalian gametogenesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nakaki, Fumio -- Hayashi, Katsuhiko -- Ohta, Hiroshi -- Kurimoto, Kazuki -- Yabuta, Yukihiro -- Saitou, Mitinori -- England -- Nature. 2013 Sep 12;501(7466):222-6. doi: 10.1038/nature12417. Epub 2013 Aug 4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Anatomy and Cell Biology, Graduate School of Medicine, Kyoto University, Yoshida-Konoe-cho, Sakyo-ku, Kyoto 606-8501, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23913270" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Cell Differentiation/genetics ; *Cell Lineage/genetics ; Embryonic Stem Cells/cytology/metabolism ; Epigenesis, Genetic ; Female ; Fertility ; Gene Expression Profiling ; Germ Cells/*cytology/*metabolism ; Germ Layers/cytology ; Male ; Mesoderm/cytology ; Mice ; Mice, Inbred C57BL ; Mice, Inbred ICR ; Mice, Transgenic ; Spermatogenesis ; Transcription Factor AP-2/genetics/metabolism ; Transcription Factors/genetics/*metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 30
    Publication Date: 2013-06-25
    Description: Transcription of the mammalian genome is pervasive, but productive transcription outside of protein-coding genes is limited by unknown mechanisms. In particular, although RNA polymerase II (RNAPII) initiates divergently from most active gene promoters, productive elongation occurs primarily in the sense-coding direction. Here we show in mouse embryonic stem cells that asymmetric sequence determinants flanking gene transcription start sites control promoter directionality by regulating promoter-proximal cleavage and polyadenylation. We find that upstream antisense RNAs are cleaved and polyadenylated at poly(A) sites (PASs) shortly after initiation. De novo motif analysis shows PAS signals and U1 small nuclear ribonucleoprotein (snRNP) recognition sites to be the most depleted and enriched sequences, respectively, in the sense direction relative to the upstream antisense direction. These U1 snRNP sites and PAS sites are progressively gained and lost, respectively, at the 5' end of coding genes during vertebrate evolution. Functional disruption of U1 snRNP activity results in a dramatic increase in promoter-proximal cleavage events in the sense direction with slight increases in the antisense direction. These data suggest that a U1-PAS axis characterized by low U1 snRNP recognition and a high density of PASs in the upstream antisense region reinforces promoter directionality by promoting early termination in upstream antisense regions, whereas proximal sense PAS signals are suppressed by U1 snRNP. We propose that the U1-PAS axis limits pervasive transcription throughout the genome.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3720719/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3720719/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Almada, Albert E -- Wu, Xuebing -- Kriz, Andrea J -- Burge, Christopher B -- Sharp, Phillip A -- GM-085319/GM/NIGMS NIH HHS/ -- P30 CA014051/CA/NCI NIH HHS/ -- P30-CA14051/CA/NCI NIH HHS/ -- R01 CA133404/CA/NCI NIH HHS/ -- R01 GM034277/GM/NIGMS NIH HHS/ -- R01 HG002439/HG/NHGRI NIH HHS/ -- R01-CA133404/CA/NCI NIH HHS/ -- R01-GM34277/GM/NIGMS NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2013 Jul 18;499(7458):360-3. doi: 10.1038/nature12349. Epub 2013 Jun 23.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23792564" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cells, Cultured ; Evolution, Molecular ; Mice ; *Polyadenylation ; *Promoter Regions, Genetic ; RNA Cleavage ; RNA, Antisense/metabolism ; Ribonucleoprotein, U1 Small Nuclear/*metabolism ; *Transcription Elongation, Genetic ; Transcription Termination, Genetic
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 31
    Publication Date: 2013-10-15
    Description: Appetite suppression occurs after a meal and in conditions when it is unfavourable to eat, such as during illness or exposure to toxins. A brain region proposed to play a role in appetite suppression is the parabrachial nucleus, a heterogeneous population of neurons surrounding the superior cerebellar peduncle in the brainstem. The parabrachial nucleus is thought to mediate the suppression of appetite induced by the anorectic hormones amylin and cholecystokinin, as well as by lithium chloride and lipopolysaccharide, compounds that mimic the effects of toxic foods and bacterial infections, respectively. Hyperactivity of the parabrachial nucleus is also thought to cause starvation after ablation of orexigenic agouti-related peptide neurons in adult mice. However, the identities of neurons in the parabrachial nucleus that regulate feeding are unknown, as are the functionally relevant downstream projections. Here we identify calcitonin gene-related peptide-expressing neurons in the outer external lateral subdivision of the parabrachial nucleus that project to the laterocapsular division of the central nucleus of the amygdala as forming a functionally important circuit for suppressing appetite. Using genetically encoded anatomical, optogenetic and pharmacogenetic tools, we demonstrate that activation of these neurons projecting to the central nucleus of the amygdala suppresses appetite. In contrast, inhibition of these neurons increases food intake in circumstances when mice do not normally eat and prevents starvation in adult mice whose agouti-related peptide neurons are ablated. Taken together, our data demonstrate that this neural circuit from the parabrachial nucleus to the central nucleus of the amygdala mediates appetite suppression in conditions when it is unfavourable to eat. This neural circuit may provide targets for therapeutic intervention to overcome or promote appetite.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3878302/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3878302/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Carter, Matthew E -- Soden, Marta E -- Zweifel, Larry S -- Palmiter, Richard D -- R01 DA024908/DA/NIDA NIH HHS/ -- R01 MH094536/MH/NIMH NIH HHS/ -- R01DA024908/DA/NIDA NIH HHS/ -- R01MH094536/MH/NIMH NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2013 Nov 7;503(7474):111-4. doi: 10.1038/nature12596. Epub 2013 Oct 13.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] Howard Hughes Medical Institute, University of Washington, Seattle, Washington 98195, USA [2] Department of Biochemistry, University of Washington, Seattle, Washington 98195, USA [3] Department of Biology, Williams College, Williamstown, Massachusetts 01267, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24121436" target="_blank"〉PubMed〈/a〉
    Keywords: Amygdala/anatomy & histology/cytology/drug effects/physiology ; Animals ; Appetite/drug effects/*genetics/*physiology ; Calcitonin Gene-Related Peptide/metabolism ; Eating/drug effects/genetics/physiology ; Female ; Male ; Mice ; Mice, Inbred C57BL ; Neural Pathways/drug effects/*physiology ; Neurons/drug effects ; Optogenetics ; Pons/anatomy & histology/cytology/drug effects/physiology ; Proto-Oncogene Proteins c-fos/metabolism ; Satiety Response/drug effects/*physiology ; Starvation/drug therapy
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 32
    Publication Date: 2013-10-08
    Description: Stem-cell niches in mammalian tissues are often heterogeneous and compartmentalized; however, whether distinct niche locations determine different stem-cell fates remains unclear. To test this hypothesis, here we use the mouse hair follicle niche and combine intravital microscopy with genetic lineage tracing to re-visit the same stem-cell lineages, from their exact place of origin, throughout regeneration in live mice. Using this method, we show directly that the position of a stem cell within the hair follicle niche can predict whether it is likely to remain uncommitted, generate precursors or commit to a differentiated fate. Furthermore, using laser ablation we demonstrate that hair follicle stem cells are dispensable for regeneration, and that epithelial cells, which do not normally participate in hair growth, re-populate the lost stem-cell compartment and sustain hair regeneration. This study provides a general model for niche-induced fate determination in adult tissues.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3895444/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3895444/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rompolas, Panteleimon -- Mesa, Kailin R -- Greco, Valentina -- 1R01AR063663-01/AR/NIAMS NIH HHS/ -- R01 AR063663/AR/NIAMS NIH HHS/ -- T32 GM007223/GM/NIGMS NIH HHS/ -- England -- Nature. 2013 Oct 24;502(7472):513-8. doi: 10.1038/nature12602. Epub 2013 Oct 6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Genetics, Department of Dermatology, Yale Stem Cell Center, Yale Cancer Center, Yale School of Medicine, New Haven, Connecticut 06510, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24097351" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Cell Differentiation ; Cell Division ; *Cell Lineage ; Epithelial Cells/cytology ; Hair Follicle/cytology ; Male ; Mice ; Regeneration ; *Stem Cell Niche ; Stem Cells/*cytology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 33
    facet.materialart.
    Unknown
    Nature Publishing Group (NPG)
    Publication Date: 2013-03-01
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ley, Ruth E -- England -- Nature. 2013 Feb 28;494(7438):437-8. doi: 10.1038/494437a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23446414" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anti-Bacterial Agents/pharmacology/*therapeutic use ; Case-Control Studies ; Child, Preschool ; *Diet Therapy ; Feces/microbiology ; Germ-Free Life ; Health ; Humans ; Infant ; Infant, Newborn ; Kwashiorkor/diet therapy/epidemiology/etiology/microbiology ; Malawi/epidemiology ; Malnutrition/etiology/*microbiology/physiopathology/*therapy ; Mice ; Nutrition Processes/drug effects ; Probiotics/therapeutic use ; Risk Factors ; Survival Rate ; Symbiosis ; Twin Studies as Topic ; Weight Loss/drug effects
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 34
    Publication Date: 2013-07-31
    Description: Mammalian pre-implantation development is a complex process involving dramatic changes in the transcriptional architecture. We report here a comprehensive analysis of transcriptome dynamics from oocyte to morula in both human and mouse embryos, using single-cell RNA sequencing. Based on single-nucleotide variants in human blastomere messenger RNAs and paternal-specific single-nucleotide polymorphisms, we identify novel stage-specific monoallelic expression patterns for a significant portion of polymorphic gene transcripts (25 to 53%). By weighted gene co-expression network analysis, we find that each developmental stage can be delineated concisely by a small number of functional modules of co-expressed genes. This result indicates a sequential order of transcriptional changes in pathways of cell cycle, gene regulation, translation and metabolism, acting in a step-wise fashion from cleavage to morula. Cross-species comparisons with mouse pre-implantation embryos reveal that the majority of human stage-specific modules (7 out of 9) are notably preserved, but developmental specificity and timing differ between human and mouse. Furthermore, we identify conserved key members (or hub genes) of the human and mouse networks. These genes represent novel candidates that are likely to be key in driving mammalian pre-implantation development. Together, the results provide a valuable resource to dissect gene regulatory mechanisms underlying progressive development of early mammalian embryos.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Xue, Zhigang -- Huang, Kevin -- Cai, Chaochao -- Cai, Lingbo -- Jiang, Chun-yan -- Feng, Yun -- Liu, Zhenshan -- Zeng, Qiao -- Cheng, Liming -- Sun, Yi E -- Liu, Jia-yin -- Horvath, Steve -- Fan, Guoping -- P01 HD006576/HD/NICHD NIH HHS/ -- P30 HD004612/HD/NICHD NIH HHS/ -- P50 DA005010/DA/NIDA NIH HHS/ -- England -- Nature. 2013 Aug 29;500(7464):593-7. doi: 10.1038/nature12364. Epub 2013 Jul 28.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Translational Center for Stem Cell Research, Tongji Hospital, Department of Regenerative Medicine, Tongji University School of Medicine, Shanghai 200065, China. xuezhigang75@gmail.com〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23892778" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Animals ; Blastocyst/cytology/metabolism ; Cell Cycle/genetics ; Embryo, Mammalian/cytology/*embryology/*metabolism ; Embryonic Development/*genetics ; Gene Expression Profiling ; *Gene Expression Regulation, Developmental ; Humans ; Mice ; Morula/cytology/metabolism ; Oocytes/cytology/metabolism ; *Sequence Analysis, RNA ; *Single-Cell Analysis
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 35
    Publication Date: 2013-03-29
    Description: Macrophages activated by the Gram-negative bacterial product lipopolysaccharide switch their core metabolism from oxidative phosphorylation to glycolysis. Here we show that inhibition of glycolysis with 2-deoxyglucose suppresses lipopolysaccharide-induced interleukin-1beta but not tumour-necrosis factor-alpha in mouse macrophages. A comprehensive metabolic map of lipopolysaccharide-activated macrophages shows upregulation of glycolytic and downregulation of mitochondrial genes, which correlates directly with the expression profiles of altered metabolites. Lipopolysaccharide strongly increases the levels of the tricarboxylic-acid cycle intermediate succinate. Glutamine-dependent anerplerosis is the principal source of succinate, although the 'GABA (gamma-aminobutyric acid) shunt' pathway also has a role. Lipopolysaccharide-induced succinate stabilizes hypoxia-inducible factor-1alpha, an effect that is inhibited by 2-deoxyglucose, with interleukin-1beta as an important target. Lipopolysaccharide also increases succinylation of several proteins. We therefore identify succinate as a metabolite in innate immune signalling, which enhances interleukin-1beta production during inflammation.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4031686/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4031686/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tannahill, G M -- Curtis, A M -- Adamik, J -- Palsson-McDermott, E M -- McGettrick, A F -- Goel, G -- Frezza, C -- Bernard, N J -- Kelly, B -- Foley, N H -- Zheng, L -- Gardet, A -- Tong, Z -- Jany, S S -- Corr, S C -- Haneklaus, M -- Caffrey, B E -- Pierce, K -- Walmsley, S -- Beasley, F C -- Cummins, E -- Nizet, V -- Whyte, M -- Taylor, C T -- Lin, H -- Masters, S L -- Gottlieb, E -- Kelly, V P -- Clish, C -- Auron, P E -- Xavier, R J -- O'Neill, L A J -- 098516/Wellcome Trust/United Kingdom -- R01 AI093451/AI/NIAID NIH HHS/ -- R56 AI090863/AI/NIAID NIH HHS/ -- U54 AI057153/AI/NIAID NIH HHS/ -- Wellcome Trust/United Kingdom -- England -- Nature. 2013 Apr 11;496(7444):238-42. doi: 10.1038/nature11986. Epub 2013 Mar 24.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin 2, Ireland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23535595" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bone Marrow Cells/cytology ; Citric Acid Cycle/drug effects ; Deoxyglucose/pharmacology ; Down-Regulation/drug effects ; Genes, Mitochondrial/drug effects/genetics ; Glutamine/metabolism ; Glycolysis/drug effects/genetics ; Humans ; Hypoxia-Inducible Factor 1, alpha Subunit/*metabolism ; Immunity, Innate/drug effects ; Inflammation/metabolism ; Interleukin-1beta/*biosynthesis/genetics ; Lipopolysaccharides/pharmacology ; Macrophages/cytology/drug effects/metabolism ; Mice ; *Signal Transduction ; Succinic Acid/*metabolism ; Up-Regulation/drug effects ; gamma-Aminobutyric Acid/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 36
    Publication Date: 2013-12-03
    Description: Genomic imprinting is an allele-specific gene expression system that is important for mammalian development and function. The molecular basis of genomic imprinting is allele-specific DNA methylation. Although it is well known that the de novo DNA methyltransferases Dnmt3a and Dnmt3b are responsible for the establishment of genomic imprinting, how the methylation mark is erased during primordial germ cell (PGC) reprogramming remains unclear. Tet1 is one of the ten-eleven translocation family proteins, which have the capacity to oxidize 5-methylcytosine (5mC), specifically expressed in reprogramming PGCs. Here we report that Tet1 has a critical role in the erasure of genomic imprinting. We show that despite their identical genotype, progenies derived from mating between Tet1 knockout males and wild-Peg10 and Peg3, which exhibit aberrant hypermethylation in the paternal allele of differential methylated regions (DMRs). RNA-seq reveals extensive dysregulation of imprinted genes in the next generation due to paternal loss of Tet1 function. Genome-wide DNA methylation analysis of embryonic day 13.5 PGCs and sperm of Tet1 knockout mice revealed hypermethylation of DMRs of imprinted genes in sperm, which can be traced back to PGCs. Analysis of the DNA methylation dynamics in reprogramming PGCs indicates that Tet1 functions to wipe out remaining methylation, including imprinted genes, at the late reprogramming stage. Furthermore, we provide evidence supporting the role of Tet1 in the erasure of paternal imprints in the female germ line. Thus, our study establishes a critical function of Tet1 in the erasure of genomic imprinting.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3957231/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3957231/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yamaguchi, Shinpei -- Shen, Li -- Liu, Yuting -- Sendler, Damian -- Zhang, Yi -- U01 DK089565/DK/NIDDK NIH HHS/ -- U01DK089565/DK/NIDDK NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2013 Dec 19;504(7480):460-4. doi: 10.1038/nature12805. Epub 2013 Dec 1.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] Howard Hughes Medical Institute, Boston Children's Hospital, Boston, Massachusetts 02115, USA [2] Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, Massachusetts 02115, USA [3] Division of Hematology/Oncology, Department of Pediatrics, Boston Children's Hospital, Boston, Massachusetts 02115, USA. ; Howard Hughes Medical Institute, Boston Children's Hospital, Boston, Massachusetts 02115, USA. ; 1] Howard Hughes Medical Institute, Boston Children's Hospital, Boston, Massachusetts 02115, USA [2] Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, Massachusetts 02115, USA [3] Division of Hematology/Oncology, Department of Pediatrics, Boston Children's Hospital, Boston, Massachusetts 02115, USA [4] Department of Genetics, Harvard Medical School, Boston, Massachusetts 02115, USA [5] Harvard Stem Cell Institute, WAB-149G, 200 Longwood Avenue, Boston, Massachusetts 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24291790" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Animals ; Cellular Reprogramming/genetics ; Crosses, Genetic ; DNA Methylation/genetics ; DNA-Binding Proteins/deficiency/genetics/*metabolism ; Dioxygenases/deficiency/genetics/metabolism ; Embryo Loss/enzymology/genetics ; Embryo, Mammalian/embryology/enzymology/metabolism ; Female ; *Genomic Imprinting/genetics ; Genotype ; Germ Cells/*metabolism ; Male ; Mice ; Mice, Knockout ; Proto-Oncogene Proteins/deficiency/genetics/*metabolism ; Spermatozoa/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 37
    Publication Date: 2013-12-07
    Description: Macroautophagy (hereafter referred to as autophagy) is a process in which organelles termed autophagosomes deliver cytoplasmic constituents to lysosomes for degradation. Autophagy has a major role in cellular homeostasis and has been implicated in various forms of human disease. The role of autophagy in cancer seems to be complex, with reports indicating both pro-tumorigenic and tumour-suppressive roles. Here we show, in a humanized genetically-modified mouse model of pancreatic ductal adenocarcinoma (PDAC), that autophagy's role in tumour development is intrinsically connected to the status of the tumour suppressor p53. Mice with pancreases containing an activated oncogenic allele of Kras (also called Ki-Ras)--the most common mutational event in PDAC--develop a small number of pre-cancerous lesions that stochastically develop into PDAC over time. However, mice also lacking the essential autophagy genes Atg5 or Atg7 accumulate low-grade, pre-malignant pancreatic intraepithelial neoplasia lesions, but progression to high-grade pancreatic intraepithelial neoplasias and PDAC is blocked. In marked contrast, in mice containing oncogenic Kras and lacking p53, loss of autophagy no longer blocks tumour progression, but actually accelerates tumour onset, with metabolic analysis revealing enhanced glucose uptake and enrichment of anabolic pathways, which can fuel tumour growth. These findings provide considerable insight into the role of autophagy in cancer and have important implications for autophagy inhibition in cancer therapy. In this regard, we also show that treatment of mice with the autophagy inhibitor hydroxychloroquine, which is currently being used in several clinical trials, significantly accelerates tumour formation in mice containing oncogenic Kras but lacking p53.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rosenfeldt, Mathias T -- O'Prey, Jim -- Morton, Jennifer P -- Nixon, Colin -- MacKay, Gillian -- Mrowinska, Agata -- Au, Amy -- Rai, Taranjit Singh -- Zheng, Liang -- Ridgway, Rachel -- Adams, Peter D -- Anderson, Kurt I -- Gottlieb, Eyal -- Sansom, Owen J -- Ryan, Kevin M -- 11650/Cancer Research UK/United Kingdom -- Cancer Research UK/United Kingdom -- England -- Nature. 2013 Dec 12;504(7479):296-300. doi: 10.1038/nature12865. Epub 2013 Dec 4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Cancer Research UK Beatson Institute, Garscube Estate, Switchback Road, Glasgow G61 1BD, UK. ; Institute of Cancer Studies, University of Glasgow, Garscube Estate, Switchback Road, Glasgow G611BD, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24305049" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Animals ; *Autophagy/drug effects/genetics ; Carcinoma, Pancreatic Ductal/*genetics/metabolism/*pathology ; Cell Line, Tumor ; Disease Models, Animal ; Genes, p53/*genetics ; Glucose/metabolism ; Glycolysis/genetics ; Humans ; Hydroxychloroquine/pharmacology ; Metabolomics ; Mice ; Mice, 129 Strain ; Mice, Inbred C57BL ; Microtubule-Associated Proteins/genetics ; Oncogene Protein p21(ras)/genetics ; Pancreatic Neoplasms/*genetics/metabolism/*pathology ; Pentose Phosphate Pathway/genetics ; Precancerous Conditions/genetics/metabolism/pathology ; Survival Analysis ; Tumor Suppressor Protein p53/deficiency/*genetics/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 38
    Publication Date: 2013-09-03
    Description: Circulating lymphocytes continuously enter lymph nodes for immune surveillance through specialized blood vessels named high endothelial venules, a process that increases markedly during immune responses. How high endothelial venules (HEVs) permit lymphocyte transmigration while maintaining vascular integrity is unknown. Here we report a role for the transmembrane O-glycoprotein podoplanin (PDPN, also known as gp38 and T1alpha) in maintaining HEV barrier function. Mice with postnatal deletion of Pdpn lost HEV integrity and exhibited spontaneous bleeding in mucosal lymph nodes, and bleeding in the draining peripheral lymph nodes after immunization. Blocking lymphocyte homing rescued bleeding, indicating that PDPN is required to protect the barrier function of HEVs during lymphocyte trafficking. Further analyses demonstrated that PDPN expressed on fibroblastic reticular cells, which surround HEVs, functions as an activating ligand for platelet C-type lectin-like receptor 2 (CLEC-2, also known as CLEC1B). Mice lacking fibroblastic reticular cell PDPN or platelet CLEC-2 exhibited significantly reduced levels of VE-cadherin (also known as CDH5), which is essential for overall vascular integrity, on HEVs. Infusion of wild-type platelets restored HEV integrity in Clec-2-deficient mice. Activation of CLEC-2 induced release of sphingosine-1-phosphate from platelets, which promoted expression of VE-cadherin on HEVs ex vivo. Furthermore, draining peripheral lymph nodes of immunized mice lacking sphingosine-1-phosphate had impaired HEV integrity similar to Pdpn- and Clec-2-deficient mice. These data demonstrate that local sphingosine-1-phosphate release after PDPN-CLEC-2-mediated platelet activation is critical for HEV integrity during immune responses.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3791160/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3791160/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Herzog, Brett H -- Fu, Jianxin -- Wilson, Stephen J -- Hess, Paul R -- Sen, Aslihan -- McDaniel, J Michael -- Pan, Yanfang -- Sheng, Minjia -- Yago, Tadayuki -- Silasi-Mansat, Robert -- McGee, Samuel -- May, Frauke -- Nieswandt, Bernhard -- Morris, Andrew J -- Lupu, Florea -- Coughlin, Shaun R -- McEver, Rodger P -- Chen, Hong -- Kahn, Mark L -- Xia, Lijun -- GM097747/GM/NIGMS NIH HHS/ -- GM103441/GM/NIGMS NIH HHS/ -- HL065590/HL/NHLBI NIH HHS/ -- HL085607/HL/NHLBI NIH HHS/ -- HL093242/HL/NHLBI NIH HHS/ -- HL103432/HL/NHLBI NIH HHS/ -- HL112788/HL/NHLBI NIH HHS/ -- P01 HL085607/HL/NHLBI NIH HHS/ -- P20 GM103527/GM/NIGMS NIH HHS/ -- P20 RR018758/RR/NCRR NIH HHS/ -- R01 GM097747/GM/NIGMS NIH HHS/ -- R01 HL103432/HL/NHLBI NIH HHS/ -- R01 HL112788/HL/NHLBI NIH HHS/ -- S10 RR024598/RR/NCRR NIH HHS/ -- England -- Nature. 2013 Oct 3;502(7469):105-9. doi: 10.1038/nature12501. Epub 2013 Sep 1.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Cardiovascular Biology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma 73104, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23995678" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, CD/metabolism ; Cadherins/metabolism ; Endothelium, Lymphatic/immunology/*metabolism ; Female ; Gene Expression Regulation ; Intercellular Junctions/genetics/immunology ; Lectins, C-Type/*metabolism ; Lymph Nodes/metabolism/pathology ; Lysophospholipids/metabolism ; Male ; Membrane Glycoproteins/genetics/*metabolism ; Mice ; Mice, Inbred C57BL ; Sphingosine/analogs & derivatives/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 39
    Publication Date: 2013-01-18
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cesari, Francesca -- Chou, I-han -- Eggleston, Angela K -- Heemels, Marie-Therese -- Marte, Barbara -- Weiss, Ursula -- England -- Nature. 2013 Jan 17;493(7432):317. doi: 10.1038/493317a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23325213" target="_blank"〉PubMed〈/a〉
    Keywords: Aging/metabolism ; Animals ; *Biology ; Child ; Child Development Disorders, Pervasive/genetics/pathology/physiopathology ; Fanconi Anemia Complementation Group Proteins/metabolism ; Humans ; Immune System/metabolism ; Mice ; Morphogenesis ; TOR Serine-Threonine Kinases/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 40
    Publication Date: 2013-11-12
    Description: Myocardial infarction, a leading cause of death in the Western world, usually occurs when the fibrous cap overlying an atherosclerotic plaque in a coronary artery ruptures. The resulting exposure of blood to the atherosclerotic material then triggers thrombus formation, which occludes the artery. The importance of genetic predisposition to coronary artery disease and myocardial infarction is best documented by the predictive value of a positive family history. Next-generation sequencing in families with several affected individuals has revolutionized mutation identification. Here we report the segregation of two private, heterozygous mutations in two functionally related genes, GUCY1A3 (p.Leu163Phefs*24) and CCT7 (p.Ser525Leu), in an extended myocardial infarction family. GUCY1A3 encodes the alpha1 subunit of soluble guanylyl cyclase (alpha1-sGC), and CCT7 encodes CCTeta, a member of the tailless complex polypeptide 1 ring complex, which, among other functions, stabilizes soluble guanylyl cyclase. After stimulation with nitric oxide, soluble guanylyl cyclase generates cGMP, which induces vasodilation and inhibits platelet activation. We demonstrate in vitro that mutations in both GUCY1A3 and CCT7 severely reduce alpha1-sGC as well as beta1-sGC protein content, and impair soluble guanylyl cyclase activity. Moreover, platelets from digenic mutation carriers contained less soluble guanylyl cyclase protein and consequently displayed reduced nitric-oxide-induced cGMP formation. Mice deficient in alpha1-sGC protein displayed accelerated thrombus formation in the microcirculation after local trauma. Starting with a severely affected family, we have identified a link between impaired soluble-guanylyl-cyclase-dependent nitric oxide signalling and myocardial infarction risk, possibly through accelerated thrombus formation. Reversing this defect may provide a new therapeutic target for reducing the risk of myocardial infarction.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Erdmann, Jeanette -- Stark, Klaus -- Esslinger, Ulrike B -- Rumpf, Philipp Moritz -- Koesling, Doris -- de Wit, Cor -- Kaiser, Frank J -- Braunholz, Diana -- Medack, Anja -- Fischer, Marcus -- Zimmermann, Martina E -- Tennstedt, Stephanie -- Graf, Elisabeth -- Eck, Sebastian -- Aherrahrou, Zouhair -- Nahrstaedt, Janja -- Willenborg, Christina -- Bruse, Petra -- Braenne, Ingrid -- Nothen, Markus M -- Hofmann, Per -- Braund, Peter S -- Mergia, Evanthia -- Reinhard, Wibke -- Burgdorf, Christof -- Schreiber, Stefan -- Balmforth, Anthony J -- Hall, Alistair S -- Bertram, Lars -- Steinhagen-Thiessen, Elisabeth -- Li, Shu-Chen -- Marz, Winfried -- Reilly, Muredach -- Kathiresan, Sekar -- McPherson, Ruth -- Walter, Ulrich -- CARDIoGRAM -- Ott, Jurg -- Samani, Nilesh J -- Strom, Tim M -- Meitinger, Thomas -- Hengstenberg, Christian -- Schunkert, Heribert -- British Heart Foundation/United Kingdom -- England -- Nature. 2013 Dec 19;504(7480):432-6. doi: 10.1038/nature12722. Epub 2013 Nov 10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] Institut fur Integrative und Experimentelle Genomik, Universitat zu Lubeck, 23562 Lubeck, Germany [2] German Centre for Cardiovascular Research (DZHK), partner site Hamburg/Lubeck/Kiel, 23562 Lubeck, Germany [3]. ; 1] Klinik und Poliklinik fur Innere Medizin II, Universitatsklinikum Regensburg, 93053 Regensburg, Germany [2] Department of Genetic Epidemiology, University of Regensburg, 93053 Regensburg, Germany [3]. ; 1] Klinik und Poliklinik fur Innere Medizin II, Universitatsklinikum Regensburg, 93053 Regensburg, Germany [2] Institut National de la Sante et de la Recherche Medicale (INSERM), UMR-S937 Paris, France [3]. ; 1] Deutsches Herzzentrum Munchen and 1. Medizinische Klinik, Klinikum rechts der Isar, Technische Universitat Munchen, 80636 Munchen, Germany [2] German Centre for Cardiovascular Research (DZHK), partner site Munich Heart Alliance, 80636 Munich, Germany [3]. ; Department of Pharmacology and Toxicology, Ruhr-University Bochum, 44801 Bochum, Germany. ; 1] German Centre for Cardiovascular Research (DZHK), partner site Hamburg/Lubeck/Kiel, 23562 Lubeck, Germany [2] Institut fur Physiologie, Universitat zu Lubeck, 23562 Lubeck, Germany. ; 1] German Centre for Cardiovascular Research (DZHK), partner site Hamburg/Lubeck/Kiel, 23562 Lubeck, Germany [2] Institut fur Humangenetik, Universitat zu Lubeck, 23562 Lubeck, Germany. ; Institut fur Humangenetik, Universitat zu Lubeck, 23562 Lubeck, Germany. ; Institut fur Integrative und Experimentelle Genomik, Universitat zu Lubeck, 23562 Lubeck, Germany. ; Klinik und Poliklinik fur Innere Medizin II, Universitatsklinikum Regensburg, 93053 Regensburg, Germany. ; 1] Institute of Human Genetics, Helmholtz Zentrum Munchen, German Research Center for Environmental Health, 85764 Neuherberg, Germany [2] Institute of Human Genetics, Technische Universitat Munchen, 81675 Munchen, Germany. ; 1] Institut fur Integrative und Experimentelle Genomik, Universitat zu Lubeck, 23562 Lubeck, Germany [2] German Centre for Cardiovascular Research (DZHK), partner site Hamburg/Lubeck/Kiel, 23562 Lubeck, Germany. ; 1] Institute of Human Genetics, University of Bonn, 53127 Bonn, Germany [2] Department of Genomics, Research Center Life & Brain, University of Bonn, 53127 Bonn, Germany. ; 1] Institute of Human Genetics, University of Bonn, 53127 Bonn, Germany [2] Division of Medical Genetics, University Hospital Basel and Department of Biomedicine, University of Basel, 4003 Basel, Switzerland. ; 1] Department of Cardiovascular Sciences, University of Leicester, Leicester LE1 7RH, UK [2] Leicester National Institute for Health Research Biomedical Research Unit in Cardiovascular Disease, Glenfield Hospital, Leicester LE1 7RH, UK. ; 1] Deutsches Herzzentrum Munchen and 1. Medizinische Klinik, Klinikum rechts der Isar, Technische Universitat Munchen, 80636 Munchen, Germany [2] German Centre for Cardiovascular Research (DZHK), partner site Munich Heart Alliance, 80636 Munich, Germany. ; Deutsches Herzzentrum Munchen and 1. Medizinische Klinik, Klinikum rechts der Isar, Technische Universitat Munchen, 80636 Munchen, Germany. ; Institute of Clinical Molecular Biology, Christian-Albrecht-Universitat, 24105 Kiel, Germany. ; Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, Leeds Institute of Genetics, Health and Therapeutics, University of Leeds, Leeds LS2 9JT, UK. ; Division of Cardiovascular and Neuronal Remodelling, Multidisciplinary Cardiovascular Research Centre, Leeds Institute of Genetics, Health and Therapeutics, University of Leeds, Leeds LS2 9JT, UK. ; Department of Vertebrate Genomics, Max Planck Institute for Molecular Genetics, 14195 Berlin, Germany. ; Charite Research Group on Geriatrics, Charite-Universitatsmedizin, 10117 Berlin, Germany. ; 1] Center for Lifespan Psychology, Max Planck Institute for Human Development, 14195 Berlin, Germany [2] Department of Psychology, TU Dresden, 01062 Dresden, Germany. ; 1] Synlab Academy and Business Development, synlab Services GmbH, 68165 Mannheim, Germany [2] Clinical Institute of Medical and Chemical Laboratory Diagnostics, Medical University of Graz, 8036 Graz, Austria [3] Medical Clinic V, Medical Faculty Mannheim, University of Heidelberg, 68167 Mannheim, Germany. ; The Cardiovascular Institute, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA. ; 1] Cardiovascular Research Center and Cardiology Division, Massachusetts General Hospital, Boston, Massachusetts 02215, USA [2] Center for Human Genetic Research, Massachusetts General Hospital, Boston, Massachusetts 02215, USA [3] Program in Medical and Population Genetics, Broad Institute of Harvard and Massachusetts Institute of Technology (MIT), Cambridge, Massachusetts 02215, USA. ; University of Ottawa, Heart Institute, Ottawa, Ontario K1Y 4W7, Canada. ; 1] Centrum fur Thrombose und Hamostase (CTH), Universitatsmedizin Mainz, 55131 Mainz, Germany [2] German Centre for Cardiovascular Research (DZHK), partner site RheinMain, 55131 Mainz, Germany. ; 1] Institute of Psychology, Chinese Academy of Sciences, Beijing 100864, China [2] Laboratory of Statistical Genetics, Rockefeller University, New York 10065, USA. ; 1] Deutsches Herzzentrum Munchen and 1. Medizinische Klinik, Klinikum rechts der Isar, Technische Universitat Munchen, 80636 Munchen, Germany [2] Institute of Human Genetics, Helmholtz Zentrum Munchen, German Research Center for Environmental Health, 85764 Neuherberg, Germany [3] Institute of Human Genetics, Technische Universitat Munchen, 81675 Munchen, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24213632" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Chaperonin Containing TCP-1/genetics/metabolism ; Cyclic GMP/metabolism ; Disease Susceptibility/*metabolism ; Exome/genetics ; Female ; Genetic Predisposition to Disease ; Guanylate Cyclase/deficiency/genetics/metabolism ; HEK293 Cells ; Humans ; Male ; Mice ; Mutation/genetics ; Myocardial Infarction/genetics/*metabolism/physiopathology ; Nitric Oxide/*metabolism ; Pedigree ; Platelet Activation ; Receptors, Cytoplasmic and Nuclear/deficiency/genetics/metabolism ; Reproducibility of Results ; *Signal Transduction ; Solubility ; Thrombosis/metabolism ; Vasodilation
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 41
    Publication Date: 2013-02-01
    Description: Candida albicans, the most prevalent human fungal pathogen, is considered to be an obligate diploid that carries recessive lethal mutations throughout the genome. Here we demonstrate that C. albicans has a viable haploid state that can be derived from diploid cells under in vitro and in vivo conditions, and that seems to arise through a concerted chromosome loss mechanism. Haploids undergo morphogenetic changes like those of diploids, including the yeast-hyphal transition, chlamydospore formation and a white-opaque switch that facilitates mating. Haploid opaque cells of opposite mating type mate efficiently to regenerate the diploid form, restoring heterozygosity and fitness. Homozygous diploids arise spontaneously by auto-diploidization, and both haploids and auto-diploids show a similar reduction in fitness, in vitro and in vivo, relative to heterozygous diploids, indicating that homozygous cell types are transient in mixed populations. Finally, we constructed stable haploid strains with multiple auxotrophies that will facilitate molecular and genetic analyses of this important pathogen.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3583542/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3583542/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hickman, Meleah A -- Zeng, Guisheng -- Forche, Anja -- Hirakawa, Matthew P -- Abbey, Darren -- Harrison, Benjamin D -- Wang, Yan-Ming -- Su, Ching-hua -- Bennett, Richard J -- Wang, Yue -- Berman, Judith -- AI0624273/AI/NIAID NIH HHS/ -- AI081560/AI/NIAID NIH HHS/ -- AI081704/AI/NIAID NIH HHS/ -- F32GM096536-02/GM/NIGMS NIH HHS/ -- P200A100100/PHS HHS/ -- R01 AI062427/AI/NIAID NIH HHS/ -- R01 AI0624273/AI/NIAID NIH HHS/ -- R01 AI081704/AI/NIAID NIH HHS/ -- R15-AI090633-01A1/AI/NIAID NIH HHS/ -- R56 AI087401/AI/NIAID NIH HHS/ -- T32DE007288/DE/NIDCR NIH HHS/ -- England -- Nature. 2013 Feb 7;494(7435):55-9. doi: 10.1038/nature11865. Epub 2013 Jan 30.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Genetics, Cell Biology & Development, University of Minnesota, Minneapolis, Minnesota 55455, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23364695" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Candida albicans/*cytology/*genetics/growth & development/pathogenicity ; Cell Separation ; *Diploidy ; Flow Cytometry ; Gene Deletion ; Genetic Fitness ; Genetic Techniques ; *Haploidy ; Haplotypes ; Heterozygote ; Homozygote ; Male ; Mice ; Mice, Inbred ICR ; Serial Passage ; *Sex ; Stress, Physiological ; Virulence/genetics
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 42
    Publication Date: 2013-01-04
    Description: Protein kinase M-zeta (PKM-zeta) is a constitutively active form of atypical protein kinase C that is exclusively expressed in the brain and implicated in the maintenance of long-term memory. Most studies that support a role for PKM-zeta in memory maintenance have used pharmacological PKM-zeta inhibitors such as the myristoylated zeta inhibitory peptide (ZIP) or chelerythrine. Here we use a genetic approach and target exon 9 of the Prkcz gene to generate mice that lack both protein kinase C-zeta (PKC-zeta) and PKM-zeta (Prkcz(-/-) mice). Prkcz(-/-) mice showed normal behaviour in a cage environment and in baseline tests of motor function and sensory perception, but displayed reduced anxiety-like behaviour. Notably, Prkcz(-/-) mice did not show deficits in learning or memory in tests of cued fear conditioning, novel object recognition, object location recognition, conditioned place preference for cocaine, or motor learning, when compared with wild-type littermates. ZIP injection into the nucleus accumbens reduced expression of cocaine-conditioned place preference in Prkcz(-/-) mice. In vitro, ZIP and scrambled ZIP inhibited PKM-zeta, PKC-iota and PKC-zeta with similar inhibition constant (K(i)) values. Chelerythrine was a weak inhibitor of PKM-zeta (K(i) = 76 muM). Our findings show that absence of PKM-zeta does not impair learning and memory in mice, and that ZIP can erase reward memory even when PKM-zeta is not present.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3548047/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3548047/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lee, Anna M -- Kanter, Benjamin R -- Wang, Dan -- Lim, Jana P -- Zou, Mimi E -- Qiu, Chichen -- McMahon, Thomas -- Dadgar, Jahan -- Fischbach-Weiss, Sarah C -- Messing, Robert O -- AA017072/AA/NIAAA NIH HHS/ -- P50 AA017072/AA/NIAAA NIH HHS/ -- T32 GM007618/GM/NIGMS NIH HHS/ -- Canadian Institutes of Health Research/Canada -- England -- Nature. 2013 Jan 17;493(7432):416-9. doi: 10.1038/nature11803. Epub 2013 Jan 2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Ernest Gallo Clinic and Research Center, Department of Neurology, University of California, San Francisco, 5858 Horton Street, Suite 200, Emeryville, California 94608, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23283171" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anxiety/genetics ; Behavior, Animal ; Benzophenanthridines/pharmacology ; Cocaine ; Conditioning, Classical ; Cues ; Exons/genetics ; Fear ; Female ; *Gene Deletion ; Male ; Memory/*physiology ; Mice ; Protein Kinase C/analysis/*deficiency/*genetics/immunology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 43
    Publication Date: 2013-08-21
    Description: The tumour necrosis factor (TNF) family is crucial for immune homeostasis, cell death and inflammation. These cytokines are recognized by members of the TNF receptor (TNFR) family of death receptors, including TNFR1 and TNFR2, and FAS and TNF-related apoptosis-inducing ligand (TRAIL) receptors. Death receptor signalling requires death-domain-mediated homotypic/heterotypic interactions between the receptor and its downstream adaptors, including TNFR1-associated death domain protein (TRADD) and FAS-associated death domain protein (FADD). Here we discover that death domains in several proteins, including TRADD, FADD, RIPK1 and TNFR1, were directly inactivated by NleB, an enteropathogenic Escherichia coli (EPEC) type III secretion system effector known to inhibit host nuclear factor-kappaB (NF-kappaB) signalling. NleB contained an unprecedented N-acetylglucosamine (GlcNAc) transferase activity that specifically modified a conserved arginine in these death domains (Arg 235 in the TRADD death domain). NleB GlcNAcylation (the addition of GlcNAc onto a protein side chain) of death domains blocked homotypic/heterotypic death domain interactions and assembly of the oligomeric TNFR1 complex, thereby disrupting TNF signalling in EPEC-infected cells, including NF-kappaB signalling, apoptosis and necroptosis. Type-III-delivered NleB also blocked FAS ligand and TRAIL-induced cell death by preventing formation of a FADD-mediated death-inducing signalling complex (DISC). The arginine GlcNAc transferase activity of NleB was required for bacterial colonization in the mouse model of EPEC infection. The mechanism of action of NleB represents a new model by which bacteria counteract host defences, and also a previously unappreciated post-translational modification.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Li, Shan -- Zhang, Li -- Yao, Qing -- Li, Lin -- Dong, Na -- Rong, Jie -- Gao, Wenqing -- Ding, Xiaojun -- Sun, Liming -- Chen, Xing -- Chen, She -- Shao, Feng -- Howard Hughes Medical Institute/ -- England -- Nature. 2013 Sep 12;501(7466):242-6. doi: 10.1038/nature12436. Epub 2013 Aug 18.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉College of Biological Sciences, China Agricultural University, Beijing 100094, China.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23955153" target="_blank"〉PubMed〈/a〉
    Keywords: Acylation ; Animals ; Antigens, CD95/metabolism ; Apoptosis ; Arginine/*metabolism ; Death Domain Receptor Signaling Adaptor Proteins/metabolism ; Disease Models, Animal ; Enteropathogenic Escherichia coli/*metabolism/pathogenicity ; Escherichia coli Infections/metabolism/microbiology/pathology ; Escherichia coli Proteins/*metabolism ; Fas-Associated Death Domain Protein/chemistry/metabolism ; HeLa Cells ; Humans ; Male ; Mice ; Mice, Inbred C57BL ; Multiprotein Complexes/chemistry/metabolism ; N-Acetylglucosaminyltransferases/*metabolism ; NF-kappa B/metabolism ; Protein Biosynthesis ; Protein Structure, Tertiary ; Receptor-Interacting Protein Serine-Threonine Kinases/chemistry/metabolism ; Receptors, Tumor Necrosis Factor, Type I/chemistry/metabolism ; *Signal Transduction ; TNF Receptor-Associated Death Domain Protein/*chemistry/*metabolism ; TNF-Related Apoptosis-Inducing Ligand/metabolism ; Tumor Necrosis Factor-alpha/metabolism ; Virulence ; Virulence Factors/*metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 44
    Publication Date: 2013-03-08
    Description: TH17 cells (interleukin-17 (IL-17)-producing helper T cells) are highly proinflammatory cells that are critical for clearing extracellular pathogens and for inducing multiple autoimmune diseases. IL-23 has a critical role in stabilizing and reinforcing the TH17 phenotype by increasing expression of IL-23 receptor (IL-23R) and endowing TH17 cells with pathogenic effector functions. However, the precise molecular mechanism by which IL-23 sustains the TH17 response and induces pathogenic effector functions has not been elucidated. Here we used transcriptional profiling of developing TH17 cells to construct a model of their signalling network and nominate major nodes that regulate TH17 development. We identified serum glucocorticoid kinase 1 (SGK1), a serine/threonine kinase, as an essential node downstream of IL-23 signalling. SGK1 is critical for regulating IL-23R expression and stabilizing the TH17 cell phenotype by deactivation of mouse Foxo1, a direct repressor of IL-23R expression. SGK1 has been shown to govern Na(+) transport and salt (NaCl) homeostasis in other cells. We show here that a modest increase in salt concentration induces SGK1 expression, promotes IL-23R expression and enhances TH17 cell differentiation in vitro and in vivo, accelerating the development of autoimmunity. Loss of SGK1 abrogated Na(+)-mediated TH17 differentiation in an IL-23-dependent manner. These data demonstrate that SGK1 has a critical role in the induction of pathogenic TH17 cells and provide a molecular insight into a mechanism by which an environmental factor such as a high salt diet triggers TH17 development and promotes tissue inflammation.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3637879/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3637879/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wu, Chuan -- Yosef, Nir -- Thalhamer, Theresa -- Zhu, Chen -- Xiao, Sheng -- Kishi, Yasuhiro -- Regev, Aviv -- Kuchroo, Vijay K -- 1P01HG005062-01/HG/NHGRI NIH HHS/ -- 1P50HG006193-01/HG/NHGRI NIH HHS/ -- AI045757/AI/NIAID NIH HHS/ -- AI073748/AI/NIAID NIH HHS/ -- DP1 CA174427/CA/NCI NIH HHS/ -- DP1 OD003958/OD/NIH HHS/ -- DP1-OD003958-01/OD/NIH HHS/ -- K01 DK090105/DK/NIDDK NIH HHS/ -- K01DK090105/DK/NIDDK NIH HHS/ -- NS030843/NS/NINDS NIH HHS/ -- NS045937/NS/NINDS NIH HHS/ -- P01 AI045757/AI/NIAID NIH HHS/ -- P01 AI073748/AI/NIAID NIH HHS/ -- P50 HG006193/HG/NHGRI NIH HHS/ -- R01 NS030843/NS/NINDS NIH HHS/ -- R01 NS045937/NS/NINDS NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2013 Apr 25;496(7446):513-7. doi: 10.1038/nature11984. Epub 2013 Mar 6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Neurologic Diseases, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23467085" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Differentiation/*drug effects ; Encephalomyelitis, Autoimmune, Experimental/chemically ; induced/immunology/metabolism/pathology ; Forkhead Transcription Factors/metabolism ; HEK293 Cells ; Humans ; Immediate-Early Proteins/deficiency/genetics/*metabolism ; Interferon-gamma/biosynthesis/immunology ; Interleukin-17/biosynthesis/immunology/*metabolism ; Mice ; Phenotype ; Phosphorylation/drug effects ; Protein-Serine-Threonine Kinases/deficiency/genetics/*metabolism ; Receptors, Interleukin/biosynthesis/immunology ; Sodium Chloride/*pharmacology ; Sodium Chloride, Dietary/pharmacology ; Th17 Cells/*drug effects/enzymology/immunology/*pathology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 45
    Publication Date: 2013-11-05
    Description: The development and severity of inflammatory bowel diseases and other chronic inflammatory conditions can be influenced by host genetic and environmental factors, including signals derived from commensal bacteria. However, the mechanisms that integrate these diverse cues remain undefined. Here we demonstrate that mice with an intestinal epithelial cell (IEC)-specific deletion of the epigenome-modifying enzyme histone deacetylase 3 (HDAC3(DeltaIEC) mice) exhibited extensive dysregulation of IEC-intrinsic gene expression, including decreased basal expression of genes associated with antimicrobial defence. Critically, conventionally housed HDAC3(DeltaIEC) mice demonstrated loss of Paneth cells, impaired IEC function and alterations in the composition of intestinal commensal bacteria. In addition, HDAC3(DeltaIEC) mice showed significantly increased susceptibility to intestinal damage and inflammation, indicating that epithelial expression of HDAC3 has a central role in maintaining intestinal homeostasis. Re-derivation of HDAC3(DeltaIEC) mice into germ-free conditions revealed that dysregulated IEC gene expression, Paneth cell homeostasis and intestinal barrier function were largely restored in the absence of commensal bacteria. Although the specific mechanisms through which IEC-intrinsic HDAC3 expression regulates these complex phenotypes remain to be determined, these data indicate that HDAC3 is a critical factor that integrates commensal-bacteria-derived signals to calibrate epithelial cell responses required to establish normal host-commensal relationships and maintain intestinal homeostasis.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3949438/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3949438/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Alenghat, Theresa -- Osborne, Lisa C -- Saenz, Steven A -- Kobuley, Dmytro -- Ziegler, Carly G K -- Mullican, Shannon E -- Choi, Inchan -- Grunberg, Stephanie -- Sinha, Rohini -- Wynosky-Dolfi, Meghan -- Snyder, Annelise -- Giacomin, Paul R -- Joyce, Karen L -- Hoang, Tram B -- Bewtra, Meenakshi -- Brodsky, Igor E -- Sonnenberg, Gregory F -- Bushman, Frederic D -- Won, Kyoung-Jae -- Lazar, Mitchell A -- Artis, David -- 2-P30 CA016520/CA/NCI NIH HHS/ -- AI061570/AI/NIAID NIH HHS/ -- AI074878/AI/NIAID NIH HHS/ -- AI087990/AI/NIAID NIH HHS/ -- AI095466/AI/NIAID NIH HHS/ -- AI095608/AI/NIAID NIH HHS/ -- AI097333/AI/NIAID NIH HHS/ -- AI102942/AI/NIAID NIH HHS/ -- AI106697/AI/NIAID NIH HHS/ -- DK043806/DK/NIDDK NIH HHS/ -- DP5 OD012116/OD/NIH HHS/ -- DP5OD012116/OD/NIH HHS/ -- F31-GM082187/GM/NIGMS NIH HHS/ -- K08 DK084347/DK/NIDDK NIH HHS/ -- K08 DK093784/DK/NIDDK NIH HHS/ -- K08-DK084347/DK/NIDDK NIH HHS/ -- K08-DK093784/DK/NIDDK NIH HHS/ -- P01 AI106697/AI/NIAID NIH HHS/ -- P30 CA016520/CA/NCI NIH HHS/ -- P30 DK019525/DK/NIDDK NIH HHS/ -- P30-DK050306/DK/NIDDK NIH HHS/ -- P30-DK19525/DK/NIDDK NIH HHS/ -- R01 AI061570/AI/NIAID NIH HHS/ -- R01 AI074878/AI/NIAID NIH HHS/ -- R01 AI095466/AI/NIAID NIH HHS/ -- R01 AI097333/AI/NIAID NIH HHS/ -- R01 AI102942/AI/NIAID NIH HHS/ -- R21 AI083480/AI/NIAID NIH HHS/ -- R21 AI087990/AI/NIAID NIH HHS/ -- R21 AI105346/AI/NIAID NIH HHS/ -- R21-AI105346/AI/NIAID NIH HHS/ -- R37 DK043806/DK/NIDDK NIH HHS/ -- T32-RR007063/RR/NCRR NIH HHS/ -- U01 AI095608/AI/NIAID NIH HHS/ -- England -- Nature. 2013 Dec 5;504(7478):153-7. doi: 10.1038/nature12687. Epub 2013 Nov 3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA [2] Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA [3] Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24185009" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Animals ; Bacteria/genetics ; Colitis, Ulcerative/enzymology/genetics/microbiology ; Crohn Disease/enzymology/genetics/microbiology ; Female ; Gene Deletion ; Gene Expression Profiling ; *Gene Expression Regulation ; Histone Deacetylases/genetics/*metabolism ; *Homeostasis ; Humans ; Intestinal Mucosa/*enzymology/pathology ; Intestines/*microbiology ; Male ; Mice ; Mice, Inbred C57BL ; Paneth Cells/cytology/metabolism ; RNA, Ribosomal, 16S/genetics ; Signal Transduction ; *Symbiosis
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 46
    Publication Date: 2013-03-01
    Description: Growth of basal cell carcinomas (BCCs) requires high levels of hedgehog (HH) signalling through the transcription factor GLI. Although inhibitors of membrane protein smoothened (SMO) effectively suppress HH signalling, early tumour resistance illustrates the need for additional downstream targets for therapy. Here we identify atypical protein kinase C iota/lambda (aPKC-iota/lambda) as a novel GLI regulator in mammals. aPKC-iota/lambda and its polarity signalling partners co-localize at the centrosome and form a complex with missing-in-metastasis (MIM), a scaffolding protein that potentiates HH signalling. Genetic or pharmacological loss of aPKC-iota/lambda function blocks HH signalling and proliferation of BCC cells. Prkci is a HH target gene that forms a positive feedback loop with GLI and exists at increased levels in BCCs. Genome-wide transcriptional profiling shows that aPKC-iota/lambda and SMO control the expression of similar genes in tumour cells. aPKC-iota/lambda functions downstream of SMO to phosphorylate and activate GLI1, resulting in maximal DNA binding and transcriptional activation. Activated aPKC-iota/lambda is upregulated in SMO-inhibitor-resistant tumours and targeting aPKC-iota/lambda suppresses signalling and growth of resistant BCC cell lines. These results demonstrate that aPKC-iota/lambda is critical for HH-dependent processes and implicates aPKC-iota/lambda as a new, tumour-selective therapeutic target for the treatment of SMO-inhibitor-resistant cancers.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3761364/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3761364/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Atwood, Scott X -- Li, Mischa -- Lee, Alex -- Tang, Jean Y -- Oro, Anthony E -- 1F32CA14208701/CA/NCI NIH HHS/ -- AR046786/AR/NIAMS NIH HHS/ -- AR052785/AR/NIAMS NIH HHS/ -- R01 AR046786/AR/NIAMS NIH HHS/ -- R01 AR052785/AR/NIAMS NIH HHS/ -- R01 AR054780/AR/NIAMS NIH HHS/ -- England -- Nature. 2013 Feb 28;494(7438):484-8. doi: 10.1038/nature11889.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Program in Epithelial Biology, Stanford University School of Medicine, Stanford, California 94305, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23446420" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Carcinoma, Basal Cell/drug therapy/enzymology/*metabolism/*pathology ; Cell Line, Tumor ; Cell Proliferation/drug effects ; Cells, Cultured ; Centrosome/metabolism ; Drug Resistance, Neoplasm ; Feedback, Physiological ; Hedgehog Proteins/metabolism ; Humans ; Isoenzymes/antagonists & inhibitors/genetics/*metabolism ; Keratinocytes/metabolism ; Kruppel-Like Transcription Factors/genetics/*metabolism ; Mice ; Phosphorylation ; Protein Kinase C/antagonists & inhibitors/genetics/*metabolism ; Receptors, G-Protein-Coupled/antagonists & inhibitors/metabolism ; Signal Transduction/drug effects ; Transcription Factors/*metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 47
    Publication Date: 2013-04-12
    Description: Obtaining high-resolution information from a complex system, while maintaining the global perspective needed to understand system function, represents a key challenge in biology. Here we address this challenge with a method (termed CLARITY) for the transformation of intact tissue into a nanoporous hydrogel-hybridized form (crosslinked to a three-dimensional network of hydrophilic polymers) that is fully assembled but optically transparent and macromolecule-permeable. Using mouse brains, we show intact-tissue imaging of long-range projections, local circuit wiring, cellular relationships, subcellular structures, protein complexes, nucleic acids and neurotransmitters. CLARITY also enables intact-tissue in situ hybridization, immunohistochemistry with multiple rounds of staining and de-staining in non-sectioned tissue, and antibody labelling throughout the intact adult mouse brain. Finally, we show that CLARITY enables fine structural analysis of clinical samples, including non-sectioned human tissue from a neuropsychiatric-disease setting, establishing a path for the transmutation of human tissue into a stable, intact and accessible form suitable for probing structural and molecular underpinnings of physiological function and disease.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4092167/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4092167/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chung, Kwanghun -- Wallace, Jenelle -- Kim, Sung-Yon -- Kalyanasundaram, Sandhiya -- Andalman, Aaron S -- Davidson, Thomas J -- Mirzabekov, Julie J -- Zalocusky, Kelly A -- Mattis, Joanna -- Denisin, Aleksandra K -- Pak, Sally -- Bernstein, Hannah -- Ramakrishnan, Charu -- Grosenick, Logan -- Gradinaru, Viviana -- Deisseroth, Karl -- DP1 OD000616/OD/NIH HHS/ -- R01 DA020794/DA/NIDA NIH HHS/ -- R01 MH099647/MH/NIMH NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2013 May 16;497(7449):332-7. doi: 10.1038/nature12107. Epub 2013 Apr 10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Bioengineering, Stanford University, Stanford, California 94305, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23575631" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain/*anatomy & histology ; Cross-Linking Reagents/chemistry ; Formaldehyde/chemistry ; Humans ; Hydrogel/chemistry ; Imaging, Three-Dimensional/*methods ; In Situ Hybridization/methods ; Lipids/isolation & purification ; Mice ; Molecular Imaging/*methods ; Permeability ; Phenotype ; Scattering, Radiation
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 48
    Publication Date: 2013-06-12
    Description: Stem cells and progenitors in many lineages undergo self-renewing divisions, but the extracellular and intracellular proteins that regulate this process are largely unknown. Glucocorticoids stimulate red blood cell formation by promoting self-renewal of early burst-forming unit-erythroid (BFU-E) progenitors. Here we show that the RNA-binding protein ZFP36L2 is a transcriptional target of the glucocorticoid receptor (GR) in BFU-Es and is required for BFU-E self-renewal. ZFP36L2 is normally downregulated during erythroid differentiation from the BFU-E stage, but its expression is maintained by all tested GR agonists that stimulate BFU-E self-renewal, and the GR binds to several potential enhancer regions of ZFP36L2. Knockdown of ZFP36L2 in cultured BFU-E cells did not affect the rate of cell division but disrupted glucocorticoid-induced BFU-E self-renewal, and knockdown of ZFP36L2 in transplanted erythroid progenitors prevented expansion of erythroid lineage progenitors normally seen following induction of anaemia by phenylhydrazine treatment. ZFP36L2 preferentially binds to messenger RNAs that are induced or maintained at high expression levels during terminal erythroid differentiation and negatively regulates their expression levels. ZFP36L2 therefore functions as part of a molecular switch promoting BFU-E self-renewal and a subsequent increase in the total numbers of colony-forming unit-erythroid (CFU-E) progenitors and erythroid cells that are generated.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3702661/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3702661/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zhang, Lingbo -- Prak, Lina -- Rayon-Estrada, Violeta -- Thiru, Prathapan -- Flygare, Johan -- Lim, Bing -- Lodish, Harvey F -- P01 HL032262/HL/NHLBI NIH HHS/ -- P01HL32262/HL/NHLBI NIH HHS/ -- P30 CA014051/CA/NCI NIH HHS/ -- England -- Nature. 2013 Jul 4;499(7456):92-6. doi: 10.1038/nature12215. Epub 2013 Jun 9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Whitehead Institute for Biomedical Research and Department of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02142, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23748442" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Count ; *Cell Division/drug effects ; Cell Lineage ; Down-Regulation ; Erythroid Precursor Cells/*cytology/*metabolism ; Erythropoiesis/genetics ; Gene Knockdown Techniques ; Glucocorticoids/pharmacology ; Mice ; RNA, Messenger/genetics/metabolism ; RNA-Binding Proteins/metabolism ; Receptors, Glucocorticoid/agonists/metabolism ; Stress, Physiological ; Tristetraprolin/deficiency/genetics/*metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 49
    facet.materialart.
    Unknown
    Nature Publishing Group (NPG)
    Publication Date: 2013-05-17
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nicholls, Henry -- England -- Nature. 2013 May 16;497(7449):306-8. doi: 10.1038/497306a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23676736" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Conservation of Natural Resources/economics/methods ; Ecuador ; Endangered Species/economics/trends ; Introduced Species/economics/*trends ; Mice ; Rats
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 50
    Publication Date: 2013-11-26
    Description: To achieve its precise neural connectivity, the developing mammalian nervous system undergoes extensive activity-dependent synapse remodelling. Recently, microglial cells have been shown to be responsible for a portion of synaptic pruning, but the remaining mechanisms remain unknown. Here we report a new role for astrocytes in actively engulfing central nervous system synapses. This process helps to mediate synapse elimination, requires the MEGF10 and MERTK phagocytic pathways, and is strongly dependent on neuronal activity. Developing mice deficient in both astrocyte pathways fail to refine their retinogeniculate connections normally and retain excess functional synapses. Finally, we show that in the adult mouse brain, astrocytes continuously engulf both excitatory and inhibitory synapses. These studies reveal a novel role for astrocytes in mediating synapse elimination in the developing and adult brain, identify MEGF10 and MERTK as critical proteins in the synapse remodelling underlying neural circuit refinement, and have important implications for understanding learning and memory as well as neurological disease processes.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3969024/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3969024/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chung, Won-Suk -- Clarke, Laura E -- Wang, Gordon X -- Stafford, Benjamin K -- Sher, Alexander -- Chakraborty, Chandrani -- Joung, Julia -- Foo, Lynette C -- Thompson, Andrew -- Chen, Chinfei -- Smith, Stephen J -- Barres, Ben A -- 5 R21NS072556/NS/NINDS NIH HHS/ -- NS069375/NS/NINDS NIH HHS/ -- P30 HD018655/HD/NICHD NIH HHS/ -- R01 EY013613/EY/NEI NIH HHS/ -- R01 NS075252/NS/NINDS NIH HHS/ -- R21 NS072556/NS/NINDS NIH HHS/ -- T32 MH020016/MH/NIMH NIH HHS/ -- England -- Nature. 2013 Dec 19;504(7480):394-400. doi: 10.1038/nature12776. Epub 2013 Nov 24.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurobiology, Stanford University, School of Medicine, Stanford, California 94305, USA. ; 1] Department of Neurobiology, Stanford University, School of Medicine, Stanford, California 94305, USA [2]. ; 1] Department of Molecular and Cellular Physiology, Stanford University, School of Medicine, Stanford, California 94305, USA [2]. ; Department of Ophthalmology and Visual Sciences, University of Michigan, Ann Arbor, Michigan 48105, USA. ; Santa Cruz Institute of Particle Physic and Department of Physics, University of California, Santa Cruz, California 95064, USA. ; Institute of Molecular and Cell Biology, A *Star, 61 Biopolis Drive, Proteos Building, 138673 Singapore. ; Children's Hospital, Harvard Medical School, 300 Longwood Avenue, CLS12250, Boston, Massachusetts 02115, USA. ; Department of Molecular and Cellular Physiology, Stanford University, School of Medicine, Stanford, California 94305, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24270812" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Astrocytes/cytology/*metabolism ; Brain/cytology ; In Vitro Techniques ; Lateral Thalamic Nuclei/cytology/metabolism ; Learning/physiology ; Membrane Proteins/deficiency/genetics/*metabolism ; Mice ; Mice, Transgenic ; Neural Pathways/cytology/*metabolism ; *Phagocytosis ; Proto-Oncogene Proteins/deficiency/genetics/*metabolism ; Receptor Protein-Tyrosine Kinases/deficiency/genetics/*metabolism ; Retina/physiology ; Synapses/*metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 51
    Publication Date: 2013-03-19
    Description: The cryptochrome (CRY) flavoproteins act as blue-light receptors in plants and insects, but perform light-independent functions at the core of the mammalian circadian clock. To drive clock oscillations, mammalian CRYs associate with the Period proteins (PERs) and together inhibit the transcription of their own genes. The SCF(FBXL3) ubiquitin ligase complex controls this negative feedback loop by promoting CRY ubiquitination and degradation. However, the molecular mechanisms of their interactions and the functional role of flavin adenine dinucleotide (FAD) binding in CRYs remain poorly understood. Here we report crystal structures of mammalian CRY2 in its apo, FAD-bound and FBXL3-SKP1-complexed forms. Distinct from other cryptochromes of known structures, mammalian CRY2 binds FAD dynamically with an open cofactor pocket. Notably, the F-box protein FBXL3 captures CRY2 by simultaneously occupying its FAD-binding pocket with a conserved carboxy-terminal tail and burying its PER-binding interface. This novel F-box-protein-substrate bipartite interaction is susceptible to disruption by both FAD and PERs, suggesting a new avenue for pharmacological targeting of the complex and a multifaceted regulatory mechanism of CRY ubiquitination.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3618506/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3618506/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Xing, Weiman -- Busino, Luca -- Hinds, Thomas R -- Marionni, Samuel T -- Saifee, Nabiha H -- Bush, Matthew F -- Pagano, Michele -- Zheng, Ning -- 5T32-HL007151/HL/NHLBI NIH HHS/ -- K99 CA166181/CA/NCI NIH HHS/ -- R01 GM057587/GM/NIGMS NIH HHS/ -- R01-CA107134/CA/NCI NIH HHS/ -- R01-GM057587/GM/NIGMS NIH HHS/ -- R21-CA161108/CA/NCI NIH HHS/ -- R37 CA076584/CA/NCI NIH HHS/ -- R37-CA-076584/CA/NCI NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2013 Apr 4;496(7443):64-8. doi: 10.1038/nature11964. Epub 2013 Mar 17.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pharmacology, University of Washington, Seattle, Washington 98195, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23503662" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Apoproteins/chemistry/metabolism ; Binding Sites ; Cryptochromes/chemistry/*metabolism ; Crystallography, X-Ray ; Deoxyribodipyrimidine Photo-Lyase/chemistry ; Drosophila melanogaster/chemistry ; F-Box Proteins/chemistry/*metabolism ; Flavin-Adenine Dinucleotide/metabolism ; Humans ; Hydrophobic and Hydrophilic Interactions ; Mice ; Models, Molecular ; Protein Structure, Tertiary ; S-Phase Kinase-Associated Proteins/chemistry/metabolism ; SKP Cullin F-Box Protein Ligases/chemistry/*metabolism ; Substrate Specificity
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 52
    Publication Date: 2013-06-14
    Description: 53BP1 (also called TP53BP1) is a chromatin-associated factor that promotes immunoglobulin class switching and DNA double-strand-break (DSB) repair by non-homologous end joining. To accomplish its function in DNA repair, 53BP1 accumulates at DSB sites downstream of the RNF168 ubiquitin ligase. How ubiquitin recruits 53BP1 to break sites remains unknown as its relocalization involves recognition of histone H4 Lys 20 (H4K20) methylation by its Tudor domain. Here we elucidate how vertebrate 53BP1 is recruited to the chromatin that flanks DSB sites. We show that 53BP1 recognizes mononucleosomes containing dimethylated H4K20 (H4K20me2) and H2A ubiquitinated on Lys 15 (H2AK15ub), the latter being a product of RNF168 action on chromatin. 53BP1 binds to nucleosomes minimally as a dimer using its previously characterized methyl-lysine-binding Tudor domain and a carboxy-terminal extension, termed the ubiquitination-dependent recruitment (UDR) motif, which interacts with the epitope formed by H2AK15ub and its surrounding residues on the H2A tail. 53BP1 is therefore a bivalent histone modification reader that recognizes a histone 'code' produced by DSB signalling.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3955401/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3955401/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fradet-Turcotte, Amelie -- Canny, Marella D -- Escribano-Diaz, Cristina -- Orthwein, Alexandre -- Leung, Charles C Y -- Huang, Hao -- Landry, Marie-Claude -- Kitevski-LeBlanc, Julianne -- Noordermeer, Sylvie M -- Sicheri, Frank -- Durocher, Daniel -- 84297-1/Canadian Institutes of Health Research/Canada -- 84297-2/Canadian Institutes of Health Research/Canada -- MOP84297/Canadian Institutes of Health Research/Canada -- England -- Nature. 2013 Jul 4;499(7456):50-4. doi: 10.1038/nature12318. Epub 2013 Jun 12.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Samuel Lunenfeld Research Institute, Mount Sinai Hospital, 600 University Avenue, Toronto, Ontario M5G 1X5, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23760478" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Motifs ; Amino Acid Sequence ; Animals ; Cell Cycle Proteins/chemistry/metabolism ; Cell Line ; Chromosomal Proteins, Non-Histone/chemistry/deficiency/genetics ; DNA Breaks, Double-Stranded ; *DNA Damage ; DNA-Binding Proteins/chemistry/deficiency/genetics ; Female ; Histones/*chemistry/*metabolism ; Humans ; Intracellular Signaling Peptides and ; Proteins/chemistry/deficiency/genetics/*metabolism ; Lysine/*metabolism ; Male ; Mice ; Molecular Sequence Data ; Mutant Proteins/chemistry/metabolism ; Nuclear Proteins/chemistry/metabolism ; Nucleosomes/chemistry/metabolism ; Protein Binding ; Protein Structure, Tertiary ; Schizosaccharomyces ; Schizosaccharomyces pombe Proteins/chemistry/metabolism ; Signal Transduction ; Ubiquitin/*metabolism ; *Ubiquitination
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 53
    Publication Date: 2013-08-06
    Description: Neuromodulatory control by oxytocin is essential to a wide range of social, parental and stress-related behaviours. Autism spectrum disorders (ASD) are associated with deficiencies in oxytocin levels and with genetic alterations of the oxytocin receptor (OXTR). Thirty years ago, Muhlethaler et al. found that oxytocin increases the firing of inhibitory hippocampal neurons, but it remains unclear how elevated inhibition could account for the ability of oxytocin to improve information processing in the brain. Here we describe in mammalian hippocampus a simple yet powerful mechanism by which oxytocin enhances cortical information transfer while simultaneously lowering background activity, thus greatly improving the signal-to-noise ratio. Increased fast-spiking interneuron activity not only suppresses spontaneous pyramidal cell firing, but also enhances the fidelity of spike transmission and sharpens spike timing. Use-dependent depression at the fast-spiking interneuron-pyramidal cell synapse is both necessary and sufficient for the enhanced spike throughput. We show the generality of this novel circuit mechanism by activation of fast-spiking interneurons with cholecystokinin or channelrhodopsin-2. This provides insight into how a diffusely delivered neuromodulator can improve the performance of neural circuitry that requires synapse specificity and millisecond precision.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Owen, Scott F -- Tuncdemir, Sebnem N -- Bader, Patrick L -- Tirko, Natasha N -- Fishell, Gord -- Tsien, Richard W -- F31MH084430/MH/NIMH NIH HHS/ -- MH064070/MH/NIMH NIH HHS/ -- MH071739/MH/NIMH NIH HHS/ -- NS024067/NS/NINDS NIH HHS/ -- England -- Nature. 2013 Aug 22;500(7463):458-62. doi: 10.1038/nature12330. Epub 2013 Aug 4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular and Cellular Physiology, 279 Campus Drive, Stanford University School of Medicine, Stanford, California 94305, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23913275" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials/*drug effects ; Animals ; Brain/metabolism ; Cholecystokinin/metabolism ; Excitatory Postsynaptic Potentials/drug effects/physiology ; Feedback, Physiological/drug effects ; Glycine/pharmacology ; Hippocampus/*cytology/physiology ; Interneurons/*drug effects/metabolism ; Mice ; Neural Pathways/drug effects ; Oxytocin/*pharmacology ; Pyramidal Cells/drug effects/metabolism ; Rats ; Receptors, Oxytocin/agonists/metabolism ; Rhodopsin/metabolism ; Synapses/drug effects/metabolism ; Synaptic Transmission/*drug effects ; Threonine/pharmacology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 54
    Publication Date: 2013-03-19
    Description: The PARKIN ubiquitin ligase (also known as PARK2) and its regulatory kinase PINK1 (also known as PARK6), often mutated in familial early-onset Parkinson's disease, have central roles in mitochondrial homeostasis and mitophagy. Whereas PARKIN is recruited to the mitochondrial outer membrane (MOM) upon depolarization via PINK1 action and can ubiquitylate porin, mitofusin and Miro proteins on the MOM, the full repertoire of PARKIN substrates--the PARKIN-dependent ubiquitylome--remains poorly defined. Here we use quantitative diGly capture proteomics (diGly) to elucidate the ubiquitylation site specificity and topology of PARKIN-dependent target modification in response to mitochondrial depolarization. Hundreds of dynamically regulated ubiquitylation sites in dozens of proteins were identified, with strong enrichment for MOM proteins, indicating that PARKIN dramatically alters the ubiquitylation status of the mitochondrial proteome. Using complementary interaction proteomics, we found depolarization-dependent PARKIN association with numerous MOM targets, autophagy receptors, and the proteasome. Mutation of the PARKIN active site residue C431, which has been found mutated in Parkinson's disease patients, largely disrupts these associations. Structural and topological analysis revealed extensive conservation of PARKIN-dependent ubiquitylation sites on cytoplasmic domains in vertebrate and Drosophila melanogaster MOM proteins. These studies provide a resource for understanding how the PINK1-PARKIN pathway re-sculpts the proteome to support mitochondrial homeostasis.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3641819/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3641819/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sarraf, Shireen A -- Raman, Malavika -- Guarani-Pereira, Virginia -- Sowa, Mathew E -- Huttlin, Edward L -- Gygi, Steven P -- Harper, J Wade -- CA139885/CA/NCI NIH HHS/ -- GM067945/GM/NIGMS NIH HHS/ -- GM070565/GM/NIGMS NIH HHS/ -- GM095567/GM/NIGMS NIH HHS/ -- R01 GM067945/GM/NIGMS NIH HHS/ -- R01 GM070565/GM/NIGMS NIH HHS/ -- R01 GM095567/GM/NIGMS NIH HHS/ -- England -- Nature. 2013 Apr 18;496(7445):372-6. doi: 10.1038/nature12043. Epub 2013 Mar 17.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell Biology, Harvard Medical School, 240 Longwood Avenue, Boston, Massachusetts 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23503661" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Drosophila Proteins/metabolism ; Drosophila melanogaster/metabolism ; Humans ; *Membrane Potential, Mitochondrial ; Mice ; Mitochondria/chemistry/*metabolism ; Mitochondrial Membranes/*metabolism ; Mitochondrial Proteins/*metabolism ; Protein Kinases/metabolism ; Proteome/*metabolism ; Proteomics ; Ubiquitin-Protein Ligases/*metabolism ; *Ubiquitination
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 55
    facet.materialart.
    Unknown
    Nature Publishing Group (NPG)
    Publication Date: 2013-10-11
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Baker, Monya -- England -- Nature. 2013 Oct 10;502(7470):156-8. doi: 10.1038/502156a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24108031" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Eye ; Humans ; Mice ; Models, Animal ; Neurons/cytology/physiology ; Neurosciences/*standards/trends ; Visual Cortex/cytology/*physiology ; Visual Perception/*physiology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 56
    Publication Date: 2013-06-01
    Description: Cytosolic DNA arising from intracellular bacterial or viral infections is a powerful pathogen-associated molecular pattern (PAMP) that leads to innate immune host defence by the production of type I interferon and inflammatory cytokines. Recognition of cytosolic DNA by the recently discovered cyclic-GMP-AMP (cGAMP) synthase (cGAS) induces the production of cGAMP to activate the stimulator of interferon genes (STING). Here we report the crystal structure of cGAS alone and in complex with DNA, ATP and GTP along with functional studies. Our results explain the broad DNA sensing specificity of cGAS, show how cGAS catalyses dinucleotide formation and indicate activation by a DNA-induced structural switch. cGAS possesses a remarkable structural similarity to the antiviral cytosolic double-stranded RNA sensor 2'-5'oligoadenylate synthase (OAS1), but contains a unique zinc thumb that recognizes B-form double-stranded DNA. Our results mechanistically unify dsRNA and dsDNA innate immune sensing by OAS1 and cGAS nucleotidyl transferases.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3768140/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3768140/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Civril, Filiz -- Deimling, Tobias -- de Oliveira Mann, Carina C -- Ablasser, Andrea -- Moldt, Manuela -- Witte, Gregor -- Hornung, Veit -- Hopfner, Karl-Peter -- 243046/European Research Council/International -- U19 AI083025/AI/NIAID NIH HHS/ -- U19AI083025/AI/NIAID NIH HHS/ -- England -- Nature. 2013 Jun 20;498(7454):332-7. doi: 10.1038/nature12305. Epub 2013 May 30.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Gene Center, Ludwig-Maximilians-University, 81377 Munich, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23722159" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Triphosphate/chemistry/metabolism ; Animals ; Base Sequence ; Catalytic Domain ; Crystallography, X-Ray ; *Cytosol ; DNA/chemistry/*metabolism/pharmacology ; Guanosine Triphosphate/chemistry/metabolism ; HEK293 Cells ; Humans ; Membrane Proteins/genetics/metabolism ; Mice ; Models, Biological ; Models, Molecular ; Mutation ; Nucleotidyltransferases/*chemistry/genetics/metabolism ; Protein Conformation/drug effects ; Structure-Activity Relationship ; Substrate Specificity ; Swine ; Uridine Triphosphate/chemistry/metabolism ; Zinc/chemistry/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 57
    facet.materialart.
    Unknown
    Nature Publishing Group (NPG)
    Publication Date: 2013-05-24
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Owens, Brian -- England -- Nature. 2013 May 23;497(7450):S8-9. doi: 10.1038/497S8a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23698508" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Body Mass Index ; CLOCK Proteins/genetics/metabolism ; Circadian Rhythm/physiology ; Energy Metabolism/*physiology ; Ghrelin/metabolism ; Humans ; Insulin Resistance/physiology ; Leptin/metabolism ; Male ; Mice ; Obesity/*physiopathology ; Satiety Response/physiology ; Sleep/*physiology ; Suprachiasmatic Nucleus/physiology ; Time Factors ; Weight Gain/physiology ; Weight Loss/physiology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 58
    Publication Date: 2013-03-22
    Description: Macrophages consist of at least two subgroups, M1 and M2 (refs 1-3). Whereas M1 macrophages are proinflammatory and have a central role in host defence against bacterial and viral infections, M2 macrophages are associated with responses to anti-inflammatory reactions, helminth infection, tissue remodelling, fibrosis and tumour progression. Trib1 is an adaptor protein involved in protein degradation by interacting with COP1 ubiquitin ligase. Genome-wide association studies in humans have implicated TRIB1 in lipid metabolism. Here we show that Trib1 is critical for the differentiation of F4/80(+)MR(+) tissue-resident macrophages--that share characteristics with M2 macrophages (which we term M2-like macrophages)--and eosinophils but not for the differentiation of M1 myeloid cells. Trib1 deficiency results in a severe reduction of M2-like macrophages in various organs, including bone marrow, spleen, lung and adipose tissues. Aberrant expression of C/EBPalpha in Trib1-deficient bone marrow cells is responsible for the defects in macrophage differentiation. Unexpectedly, mice lacking Trib1 in haematopoietic cells show diminished adipose tissue mass accompanied by evidence of increased lipolysis, even when fed a normal diet. Supplementation of M2-like macrophages rescues the pathophysiology, indicating that a lack of these macrophages is the cause of lipolysis. In response to a high-fat diet, mice lacking Trib1 in haematopoietic cells develop hypertriglyceridaemia and insulin resistance, together with increased proinflammatory cytokine gene induction. Collectively, these results demonstrate that Trib1 is critical for adipose tissue maintenance and suppression of metabolic disorders by controlling the differentiation of tissue-resident M2-like macrophages.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Satoh, Takashi -- Kidoya, Hiroyasu -- Naito, Hisamichi -- Yamamoto, Masahiro -- Takemura, Naoki -- Nakagawa, Katsuhiro -- Yoshioka, Yoshichika -- Morii, Eiichi -- Takakura, Nobuyuki -- Takeuchi, Osamu -- Akira, Shizuo -- P01 AI070167/AI/NIAID NIH HHS/ -- England -- Nature. 2013 Mar 28;495(7442):524-8. doi: 10.1038/nature11930. Epub 2013 Mar 20.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Host Defense, WPI Immunology Frontier Research Center, Osaka University, 3-1 Yamada-oka, Suita, Osaka 565-0871, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23515163" target="_blank"〉PubMed〈/a〉
    Keywords: Adipose Tissue/*cytology/metabolism/pathology ; Animals ; Bone Marrow Cells/cytology/metabolism ; CCAAT-Enhancer-Binding Protein-alpha/metabolism ; Cell Count ; Cell Cycle Proteins/deficiency/genetics/metabolism ; *Cell Differentiation ; Cytokines/genetics ; Diet, High-Fat/adverse effects ; Eosinophils/cytology/metabolism ; Female ; Hypertriglyceridemia/chemically induced/genetics ; Inflammation Mediators/metabolism ; Insulin Resistance/genetics ; Intracellular Signaling Peptides and ; Proteins/chemistry/deficiency/genetics/*metabolism ; Lipodystrophy/chemically induced/metabolism/pathology ; Lipolysis ; Lung/cytology ; Macrophages/classification/*cytology/*metabolism ; Male ; Mice ; Neutrophils/cytology/metabolism ; Organ Specificity ; Protein Structure, Tertiary ; Protein-Serine-Threonine Kinases/*antagonists & ; inhibitors/chemistry/deficiency/genetics/metabolism ; Spleen/cytology ; Ubiquitin/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 59
    facet.materialart.
    Unknown
    Nature Publishing Group (NPG)
    Publication Date: 2013-01-11
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Baker, Monya -- England -- Nature. 2013 Jan 10;493(7431):145. doi: 10.1038/493145a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23302837" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Embryonic Stem Cells/cytology/immunology ; Humans ; Induced Pluripotent Stem Cells/cytology/*immunology ; Mice ; *Patient Safety ; *Stem Cell Transplantation/adverse effects ; Transplantation Immunology/*immunology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 60
    Publication Date: 2013-06-12
    Description: Cerebral cavernous malformation (CCM) is a vascular dysplasia, mainly localized within the brain and affecting up to 0.5% of the human population. CCM lesions are formed by enlarged and irregular blood vessels that often result in cerebral haemorrhages. CCM is caused by loss-of-function mutations in one of three genes, namely CCM1 (also known as KRIT1), CCM2 (OSM) and CCM3 (PDCD10), and occurs in both sporadic and familial forms. Recent studies have investigated the cause of vascular dysplasia and fragility in CCM, but the in vivo functions of this ternary complex remain unclear. Postnatal deletion of any of the three Ccm genes in mouse endothelium results in a severe phenotype, characterized by multiple brain vascular malformations that are markedly similar to human CCM lesions. Endothelial-to-mesenchymal transition (EndMT) has been described in different pathologies, and it is defined as the acquisition of mesenchymal- and stem-cell-like characteristics by the endothelium. Here we show that endothelial-specific disruption of the Ccm1 gene in mice induces EndMT, which contributes to the development of vascular malformations. EndMT in CCM1-ablated endothelial cells is mediated by the upregulation of endogenous BMP6 that, in turn, activates the transforming growth factor-beta (TGF-beta) and bone morphogenetic protein (BMP) signalling pathway. Inhibitors of the TGF-beta and BMP pathway prevent EndMT both in vitro and in vivo and reduce the number and size of vascular lesions in CCM1-deficient mice. Thus, increased TGF-beta and BMP signalling, and the consequent EndMT of CCM1-null endothelial cells, are crucial events in the onset and progression of CCM disease. These studies offer novel therapeutic opportunities for this severe, and so far incurable, pathology.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Maddaluno, Luigi -- Rudini, Noemi -- Cuttano, Roberto -- Bravi, Luca -- Giampietro, Costanza -- Corada, Monica -- Ferrarini, Luca -- Orsenigo, Fabrizio -- Papa, Eleanna -- Boulday, Gwenola -- Tournier-Lasserve, Elisabeth -- Chapon, Francoise -- Richichi, Cristina -- Retta, Saverio Francesco -- Lampugnani, Maria Grazia -- Dejana, Elisabetta -- England -- Nature. 2013 Jun 27;498(7455):492-6. doi: 10.1038/nature12207. Epub 2013 Jun 9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉IFOM Fondazione, FIRC Institute of Molecular Oncology, 20139 Milan, Italy. uigi.maddaluno@ifom.eu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23748444" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bone Morphogenetic Protein 6/antagonists & inhibitors/metabolism/pharmacology ; Disease Models, Animal ; *Disease Progression ; *Epithelial-Mesenchymal Transition/drug effects/genetics ; Hemangioma, Cavernous, Central Nervous System/genetics/*pathology ; Humans ; Mice ; Microtubule-Associated Proteins/deficiency/genetics/metabolism ; Proto-Oncogene Proteins/deficiency/genetics/metabolism ; Signal Transduction/drug effects/genetics ; Transforming Growth Factor beta/antagonists & inhibitors/metabolism ; Up-Regulation
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 61
    Publication Date: 2013-06-25
    Description: In the mammalian neocortex, segregated processing streams are thought to be important for forming sensory representations of the environment, but how local information in primary sensory cortex is transmitted to other distant cortical areas during behaviour is unclear. Here we show task-dependent activation of distinct, largely non-overlapping long-range projection neurons in the whisker region of primary somatosensory cortex (S1) in awake, behaving mice. Using two-photon calcium imaging, we monitored neuronal activity in anatomically identified S1 neurons projecting to secondary somatosensory (S2) or primary motor (M1) cortex in mice using their whiskers to perform a texture-discrimination task or a task that required them to detect the presence of an object at a certain location. Whisking-related cells were found among S2-projecting (S2P) but not M1-projecting (M1P) neurons. A higher fraction of S2P than M1P neurons showed touch-related responses during texture discrimination, whereas a higher fraction of M1P than S2P neurons showed touch-related responses during the detection task. In both tasks, S2P and M1P neurons could discriminate similarly between trials producing different behavioural decisions. However, in trials producing the same decision, S2P neurons performed better at discriminating texture, whereas M1P neurons were better at discriminating location. Sensory stimulus features alone were not sufficient to elicit these differences, suggesting that selective transmission of S1 information to S2 and M1 is driven by behaviour.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chen, Jerry L -- Carta, Stefano -- Soldado-Magraner, Joana -- Schneider, Bernard L -- Helmchen, Fritjof -- England -- Nature. 2013 Jul 18;499(7458):336-40. doi: 10.1038/nature12236. Epub 2013 Jun 23.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Brain Research Institute, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23792559" target="_blank"〉PubMed〈/a〉
    Keywords: Afferent Pathways ; Animals ; Behavior, Animal ; Calcium/analysis ; Discrimination (Psychology)/*physiology ; Mice ; Neurons/chemistry/*physiology ; Somatosensory Cortex/cytology/*physiology ; Vibrissae/innervation
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 62
    facet.materialart.
    Unknown
    Nature Publishing Group (NPG)
    Publication Date: 2013-04-27
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fishell, Gordon -- England -- Nature. 2013 Apr 25;496(7446):421-2. doi: 10.1038/496421a.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Neuroscience Institute, New York University, New York, NY 10016, USA. fisheg01@nyumc.org〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23619676" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Animals, Laboratory ; *Cyclonic Storms ; Disasters/*history ; History, 21st Century ; Laboratories/*history ; Mice ; Mice, Transgenic ; New York City ; Research/*history
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 63
    Publication Date: 2013-01-11
    Description: The advantages of using induced pluripotent stem cells (iPSCs) instead of embryonic stem (ES) cells in regenerative medicine centre around circumventing concerns about the ethics of using ES cells and the likelihood of immune rejection of ES-cell-derived tissues. However, partial reprogramming and genetic instabilities in iPSCs could elicit immune responses in transplant recipients even when iPSC-derived differentiated cells are transplanted. iPSCs are first differentiated into specific types of cells in vitro for subsequent transplantation. Although model transplantation experiments have been conducted using various iPSC-derived differentiated tissues and immune rejections have not been observed, careful investigation of the immunogenicity of iPSC-derived tissue is becoming increasingly critical, especially as this has not been the focus of most studies done so far. A recent study reported immunogenicity of iPSC- but not ES-cell-derived teratomas and implicated several causative genes. Nevertheless, some controversy has arisen regarding these findings. Here we examine the immunogenicity of differentiated skin and bone marrow tissues derived from mouse iPSCs. To ensure optimal comparison of iPSCs and ES cells, we established ten integration-free iPSC and seven ES-cell lines using an inbred mouse strain, C57BL/6. We observed no differences in the rate of success of transplantation when skin and bone marrow cells derived from iPSCs were compared with ES-cell-derived tissues. Moreover, we observed limited or no immune responses, including T-cell infiltration, for tissues derived from either iPSCs or ES cells, and no increase in the expression of the immunogenicity-causing Zg16 and Hormad1 genes in regressing skin and teratoma tissues. Our findings suggest limited immunogenicity of transplanted cells differentiated from iPSCs and ES cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Araki, Ryoko -- Uda, Masahiro -- Hoki, Yuko -- Sunayama, Misato -- Nakamura, Miki -- Ando, Shunsuke -- Sugiura, Mayumi -- Ideno, Hisashi -- Shimada, Akemi -- Nifuji, Akira -- Abe, Masumi -- England -- Nature. 2013 Feb 7;494(7435):100-4. doi: 10.1038/nature11807. Epub 2013 Jan 9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Transcriptome Research Group, National Institute of Radiological Sciences, Chiba 263-8555, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23302801" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bone Marrow/immunology ; Bone Marrow Cells/cytology/immunology ; Bone Marrow Transplantation/*immunology ; Cell Cycle Proteins/immunology/metabolism ; Cell Differentiation/*immunology ; Embryonic Stem Cells/*cytology/immunology ; Gene Expression Profiling ; Induced Pluripotent Stem Cells/*cytology/immunology ; Male ; Membrane Proteins/immunology/metabolism ; Mice ; Mice, Inbred C57BL ; Skin/cytology/immunology ; Skin Transplantation/*immunology ; Teratoma/immunology/pathology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 64
    Publication Date: 2013-07-13
    Description: Cell-surface receptors frequently use scaffold proteins to recruit cytoplasmic targets, but the rationale for this is uncertain. Activated receptor tyrosine kinases, for example, engage scaffolds such as Shc1 that contain phosphotyrosine (pTyr)-binding (PTB) domains. Using quantitative mass spectrometry, here we show that mammalian Shc1 responds to epidermal growth factor (EGF) stimulation through multiple waves of distinct phosphorylation events and protein interactions. After stimulation, Shc1 rapidly binds a group of proteins that activate pro-mitogenic or survival pathways dependent on recruitment of the Grb2 adaptor to Shc1 pTyr sites. Akt-mediated feedback phosphorylation of Shc1 Ser 29 then recruits the Ptpn12 tyrosine phosphatase. This is followed by a sub-network of proteins involved in cytoskeletal reorganization, trafficking and signal termination that binds Shc1 with delayed kinetics, largely through the SgK269 pseudokinase/adaptor protein. Ptpn12 acts as a switch to convert Shc1 from pTyr/Grb2-based signalling to SgK269-mediated pathways that regulate cell invasion and morphogenesis. The Shc1 scaffold therefore directs the temporal flow of signalling information after EGF stimulation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zheng, Yong -- Zhang, Cunjie -- Croucher, David R -- Soliman, Mohamed A -- St-Denis, Nicole -- Pasculescu, Adrian -- Taylor, Lorne -- Tate, Stephen A -- Hardy, W Rod -- Colwill, Karen -- Dai, Anna Yue -- Bagshaw, Rick -- Dennis, James W -- Gingras, Anne-Claude -- Daly, Roger J -- Pawson, Tony -- MOP-13466-6849/Canadian Institutes of Health Research/Canada -- England -- Nature. 2013 Jul 11;499(7457):166-71. doi: 10.1038/nature12308.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Samuel Lunenfeld Research Institute, Mount Sinai Hospital, 600 University Avenue, Toronto M5G 1X5, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23846654" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Breast/cytology ; Cell Line ; Epidermal Growth Factor/*metabolism ; Epithelial Cells/cytology ; Extracellular Signal-Regulated MAP Kinases/metabolism ; Feedback, Physiological ; GRB2 Adaptor Protein/deficiency/genetics/metabolism ; Humans ; Mice ; Multiprotein Complexes/chemistry/metabolism ; Phosphorylation ; Protein Binding ; Protein-Tyrosine Kinases ; Proto-Oncogene Proteins c-akt/metabolism ; Rats ; Receptor, Epidermal Growth Factor/agonists/metabolism ; Shc Signaling Adaptor Proteins/deficiency/genetics/*metabolism ; *Signal Transduction ; Time Factors
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 65
    Publication Date: 2013-05-07
    Description: Semaphorin 3A (Sema3A) is a diffusible axonal chemorepellent that has an important role in axon guidance. Previous studies have demonstrated that Sema3a(-/-) mice have multiple developmental defects due to abnormal neuronal innervations. Here we show in mice that Sema3A is abundantly expressed in bone, and cell-based assays showed that Sema3A affected osteoblast differentiation in a cell-autonomous fashion. Accordingly, Sema3a(-/-) mice had a low bone mass due to decreased bone formation. However, osteoblast-specific Sema3A-deficient mice (Sema3acol1(-/-) and Sema3aosx(-/-) mice) had normal bone mass, even though the expression of Sema3A in bone was substantially decreased. In contrast, mice lacking Sema3A in neurons (Sema3asynapsin(-/-) and Sema3anestin(-/-) mice) had low bone mass, similar to Sema3a(-/-) mice, indicating that neuron-derived Sema3A is responsible for the observed bone abnormalities independent of the local effect of Sema3A in bone. Indeed, the number of sensory innervations of trabecular bone was significantly decreased in Sema3asynapsin(-/-) mice, whereas sympathetic innervations of trabecular bone were unchanged. Moreover, ablating sensory nerves decreased bone mass in wild-type mice, whereas it did not reduce the low bone mass in Sema3anestin(-/-) mice further, supporting the essential role of the sensory nervous system in normal bone homeostasis. Finally, neuronal abnormalities in Sema3a(-/-) mice, such as olfactory development, were identified in Sema3asynasin(-/-) mice, demonstrating that neuron-derived Sema3A contributes to the abnormal neural development seen in Sema3a(-/-) mice, and indicating that Sema3A produced in neurons regulates neural development in an autocrine manner. This study demonstrates that Sema3A regulates bone remodelling indirectly by modulating sensory nerve development, but not directly by acting on osteoblasts.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fukuda, Toru -- Takeda, Shu -- Xu, Ren -- Ochi, Hiroki -- Sunamura, Satoko -- Sato, Tsuyoshi -- Shibata, Shinsuke -- Yoshida, Yutaka -- Gu, Zirong -- Kimura, Ayako -- Ma, Chengshan -- Xu, Cheng -- Bando, Waka -- Fujita, Koji -- Shinomiya, Kenichi -- Hirai, Takashi -- Asou, Yoshinori -- Enomoto, Mitsuhiro -- Okano, Hideyuki -- Okawa, Atsushi -- Itoh, Hiroshi -- NS065048/NS/NINDS NIH HHS/ -- England -- Nature. 2013 May 23;497(7450):490-3. doi: 10.1038/nature12115. Epub 2013 May 5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Internal Medicine, School of Medicine, Keio University, Shinanomachi 35, Shinjyuku-ku, Tokyo 160-8582, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23644455" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Bone Remodeling ; Bone and Bones/anatomy & histology/*innervation/*metabolism ; Cell Differentiation ; Cells, Cultured ; Female ; Male ; Mice ; Organ Size ; Osteoblasts/cytology/metabolism ; Semaphorin-3A/deficiency/genetics/*metabolism ; Sensory Receptor Cells/cytology/*metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 66
    Publication Date: 2013-11-15
    Description: Gut commensal microbes shape the mucosal immune system by regulating the differentiation and expansion of several types of T cell. Clostridia, a dominant class of commensal microbe, can induce colonic regulatory T (Treg) cells, which have a central role in the suppression of inflammatory and allergic responses. However, the molecular mechanisms by which commensal microbes induce colonic Treg cells have been unclear. Here we show that a large bowel microbial fermentation product, butyrate, induces the differentiation of colonic Treg cells in mice. A comparative NMR-based metabolome analysis suggests that the luminal concentrations of short-chain fatty acids positively correlates with the number of Treg cells in the colon. Among short-chain fatty acids, butyrate induced the differentiation of Treg cells in vitro and in vivo, and ameliorated the development of colitis induced by adoptive transfer of CD4(+) CD45RB(hi) T cells in Rag1(-/-) mice. Treatment of naive T cells under the Treg-cell-polarizing conditions with butyrate enhanced histone H3 acetylation in the promoter and conserved non-coding sequence regions of the Foxp3 locus, suggesting a possible mechanism for how microbial-derived butyrate regulates the differentiation of Treg cells. Our findings provide new insight into the mechanisms by which host-microbe interactions establish immunological homeostasis in the gut.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Furusawa, Yukihiro -- Obata, Yuuki -- Fukuda, Shinji -- Endo, Takaho A -- Nakato, Gaku -- Takahashi, Daisuke -- Nakanishi, Yumiko -- Uetake, Chikako -- Kato, Keiko -- Kato, Tamotsu -- Takahashi, Masumi -- Fukuda, Noriko N -- Murakami, Shinnosuke -- Miyauchi, Eiji -- Hino, Shingo -- Atarashi, Koji -- Onawa, Satoshi -- Fujimura, Yumiko -- Lockett, Trevor -- Clarke, Julie M -- Topping, David L -- Tomita, Masaru -- Hori, Shohei -- Ohara, Osamu -- Morita, Tatsuya -- Koseki, Haruhiko -- Kikuchi, Jun -- Honda, Kenya -- Hase, Koji -- Ohno, Hiroshi -- England -- Nature. 2013 Dec 19;504(7480):446-50. doi: 10.1038/nature12721. Epub 2013 Nov 13.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] RIKEN Center for Integrative Medical Sciences (IMS-RCAI), Kanagawa 230-0045, Japan [2] The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan [3]. ; 1] RIKEN Center for Integrative Medical Sciences (IMS-RCAI), Kanagawa 230-0045, Japan [2] The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan [3] Graduate School of Medicine, Chiba University, Chiba 260-8670, Japan [4]. ; 1] RIKEN Center for Integrative Medical Sciences (IMS-RCAI), Kanagawa 230-0045, Japan [2] Institute for Advanced Biosciences, Keio University, Yamagata 997-0052, Japan [3]. ; RIKEN Center for Integrative Medical Sciences (IMS-RCAI), Kanagawa 230-0045, Japan. ; Institute for Advanced Biosciences, Keio University, Yamagata 997-0052, Japan. ; 1] RIKEN Center for Integrative Medical Sciences (IMS-RCAI), Kanagawa 230-0045, Japan [2] Graduate School of Medical Life Science, Yokohama City University, Kanagawa 230-0045, Japan. ; Faculty of Agriculture, Shizuoka University, Shizuoka 422-8529, Japan. ; 1] RIKEN Center for Integrative Medical Sciences (IMS-RCAI), Kanagawa 230-0045, Japan [2] PRESTO, Japan Science and Technology Agency, Saitama 332-0012, Japan. ; The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan. ; Preventative Health National Research Flagship, CSIRO Food and Nutritional Sciences, South Australia 5000, Australia. ; 1] RIKEN Center for Integrative Medical Sciences (IMS-RCAI), Kanagawa 230-0045, Japan [2] Graduate School of Medicine, Chiba University, Chiba 260-8670, Japan [3] Graduate School of Medical Life Science, Yokohama City University, Kanagawa 230-0045, Japan. ; 1] Graduate School of Medical Life Science, Yokohama City University, Kanagawa 230-0045, Japan [2] RIKEN Center for Sustainable Resource Science, Kanagawa 230-0045, Japan. ; 1] RIKEN Center for Integrative Medical Sciences (IMS-RCAI), Kanagawa 230-0045, Japan [2] CREST, Japan Science and Technology Agency, Saitama 332-0012, Japan. ; 1] RIKEN Center for Integrative Medical Sciences (IMS-RCAI), Kanagawa 230-0045, Japan [2] The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan [3] PRESTO, Japan Science and Technology Agency, Saitama 332-0012, Japan [4].〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24226770" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylation/drug effects ; Adoptive Transfer ; Animals ; Butyrates/analysis/*metabolism/pharmacology ; *Cell Differentiation/drug effects ; Colitis/drug therapy/pathology ; Colon/cytology/*immunology/metabolism/*microbiology ; Conserved Sequence ; Female ; *Fermentation ; Forkhead Transcription Factors/genetics ; Germ-Free Life ; Histones/metabolism ; Homeostasis/drug effects ; Intestinal Mucosa/cytology/immunology ; Lymphocyte Count ; Magnetic Resonance Spectroscopy ; Male ; Metabolome ; Mice ; Promoter Regions, Genetic/drug effects ; *Symbiosis ; T-Lymphocytes, Regulatory/*cytology/drug effects/immunology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 67
    Publication Date: 2013-10-04
    Description: Nutrient deprivation is a stimulus shared by both autophagy and the formation of primary cilia. The recently discovered role of primary cilia in nutrient sensing and signalling motivated us to explore the possible functional interactions between this signalling hub and autophagy. Here we show that part of the molecular machinery involved in ciliogenesis also participates in the early steps of the autophagic process. Signalling from the cilia, such as that from the Hedgehog pathway, induces autophagy by acting directly on essential autophagy-related proteins strategically located in the base of the cilium by ciliary trafficking proteins. Whereas abrogation of ciliogenesis partially inhibits autophagy, blockage of autophagy enhances primary cilia growth and cilia-associated signalling during normal nutritional conditions. We propose that basal autophagy regulates ciliary growth through the degradation of proteins required for intraflagellar transport. Compromised ability to activate the autophagic response may underlie some common ciliopathies.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3896125/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3896125/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pampliega, Olatz -- Orhon, Idil -- Patel, Bindi -- Sridhar, Sunandini -- Diaz-Carretero, Antonio -- Beau, Isabelle -- Codogno, Patrice -- Satir, Birgit H -- Satir, Peter -- Cuervo, Ana Maria -- AG031782/AG/NIA NIH HHS/ -- AG038072/AG/NIA NIH HHS/ -- DK098408/DK/NIDDK NIH HHS/ -- P01 AG031782/AG/NIA NIH HHS/ -- P30 AG038072/AG/NIA NIH HHS/ -- R01 DK098408/DK/NIDDK NIH HHS/ -- R37 AG021904/AG/NIA NIH HHS/ -- England -- Nature. 2013 Oct 10;502(7470):194-200. doi: 10.1038/nature12639. Epub 2013 Oct 2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Development and Molecular Biology, Albert Einstein College of Medicine, Bronx, New York 10461, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24089209" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Autophagy/genetics/*physiology ; Carrier Proteins/genetics/metabolism ; Cell Line ; Cilia/metabolism/*physiology ; Hedgehog Proteins/metabolism ; Mice ; Protein Transport ; Signal Transduction
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 68
    Publication Date: 2013-02-15
    Description: In the tongue, distinct classes of taste receptor cells detect the five basic tastes; sweet, sour, bitter, sodium salt and umami. Among these qualities, bitter and sour stimuli are innately aversive, whereas sweet and umami are appetitive and generally attractive to animals. By contrast, salty taste is unique in that increasing salt concentration fundamentally transforms an innately appetitive stimulus into a powerfully aversive one. This appetitive-aversive balance helps to maintain appropriate salt consumption, and represents an important part of fluid and electrolyte homeostasis. We have shown previously that the appetitive responses to NaCl are mediated by taste receptor cells expressing the epithelial sodium channel, ENaC, but the cellular substrate for salt aversion was unknown. Here we examine the cellular and molecular basis for the rejection of high concentrations of salts. We show that high salt recruits the two primary aversive taste pathways by activating the sour- and bitter-taste-sensing cells. We also demonstrate that genetic silencing of these pathways abolishes behavioural aversion to concentrated salt, without impairing salt attraction. Notably, mice devoid of salt-aversion pathways show unimpeded, continuous attraction even to very high concentrations of NaCl. We propose that the 'co-opting' of sour and bitter neural pathways evolved as a means to ensure that high levels of salt reliably trigger robust behavioural rejection, thus preventing its potentially detrimental effects on health.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3587117/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3587117/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Oka, Yuki -- Butnaru, Matthew -- von Buchholtz, Lars -- Ryba, Nicholas J P -- Zuker, Charles S -- ZIA DE000561-18/Intramural NIH HHS/ -- ZIA DE000561-19/Intramural NIH HHS/ -- ZIA DE000561-20/Intramural NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2013 Feb 28;494(7438):472-5. doi: 10.1038/nature11905. Epub 2013 Feb 13.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute and Department of Biochemistry and Molecular Biophysics, Columbia College of Physicians and Surgeons, Columbia University, New York, New York 10032, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23407495" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Appetite/drug effects/genetics/physiology ; Feeding Behavior/drug effects/physiology ; Gene Silencing ; Mice ; Mice, Knockout ; Mutation/genetics ; Phospholipase C beta/deficiency/genetics/metabolism ; Sodium Chloride, Dietary/administration & dosage/*pharmacology ; TRPM Cation Channels/deficiency/genetics/metabolism ; Taste/*drug effects/genetics/*physiology ; Taste Buds/cytology/*drug effects/*metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 69
    Publication Date: 2013-11-01
    Description: Adiponectin secreted from adipocytes binds to adiponectin receptors AdipoR1 and AdipoR2, and exerts antidiabetic effects via activation of AMPK and PPAR-alpha pathways, respectively. Levels of adiponectin in plasma are reduced in obesity, which causes insulin resistance and type 2 diabetes. Thus, orally active small molecules that bind to and activate AdipoR1 and AdipoR2 could ameliorate obesity-related diseases such as type 2 diabetes. Here we report the identification of orally active synthetic small-molecule AdipoR agonists. One of these compounds, AdipoR agonist (AdipoRon), bound to both AdipoR1 and AdipoR2 in vitro. AdipoRon showed very similar effects to adiponectin in muscle and liver, such as activation of AMPK and PPAR-alpha pathways, and ameliorated insulin resistance and glucose intolerance in mice fed a high-fat diet, which was completely obliterated in AdipoR1 and AdipoR2 double-knockout mice. Moreover, AdipoRon ameliorated diabetes of genetically obese rodent model db/db mice, and prolonged the shortened lifespan of db/db mice on a high-fat diet. Thus, orally active AdipoR agonists such as AdipoRon are a promising therapeutic approach for the treatment of obesity-related diseases such as type 2 diabetes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Okada-Iwabu, Miki -- Yamauchi, Toshimasa -- Iwabu, Masato -- Honma, Teruki -- Hamagami, Ken-ichi -- Matsuda, Koichi -- Yamaguchi, Mamiko -- Tanabe, Hiroaki -- Kimura-Someya, Tomomi -- Shirouzu, Mikako -- Ogata, Hitomi -- Tokuyama, Kumpei -- Ueki, Kohjiro -- Nagano, Tetsuo -- Tanaka, Akiko -- Yokoyama, Shigeyuki -- Kadowaki, Takashi -- England -- Nature. 2013 Nov 28;503(7477):493-9. doi: 10.1038/nature12656. Epub 2013 Oct 30.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo 113-0033, Japan [2] Department of Integrated Molecular Science on Metabolic Diseases, 22nd Century Medical and Research Center, The University of Tokyo, Tokyo 113-0033, Japan [3] Department of Molecular Medicinal Sciences on Metabolic Regulation, 22nd Century Medical and Research Center, The University of Tokyo, Tokyo 113-0033, Japan [4].〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24172895" target="_blank"〉PubMed〈/a〉
    Keywords: Adenylate Kinase/metabolism ; Adiponectin/metabolism/pharmacology ; Adipose Tissue, White/drug effects/metabolism/pathology ; Administration, Oral ; Animals ; Diabetes Mellitus, Type 2/complications/*drug therapy/metabolism/prevention & ; control ; Diet, High-Fat ; Drug Evaluation, Preclinical ; Dyslipidemias/drug therapy ; Enzyme Activation/drug effects ; Glucose Intolerance/drug therapy ; Inflammation/drug therapy ; Insulin Resistance ; Liver/drug effects/metabolism/pathology ; Longevity/*drug effects ; Mice ; Mitochondria/drug effects/metabolism ; Muscle Fibers, Skeletal/cytology/drug effects ; Muscles/cytology ; Obesity/complications/drug therapy/genetics/*physiopathology ; Oxidative Stress/drug effects ; PPAR alpha/metabolism ; Piperidines/administration & dosage/metabolism/*pharmacology/therapeutic use ; Receptors, Adiponectin/*agonists/deficiency/genetics/metabolism ; Signal Transduction/drug effects ; Small Molecule Libraries/chemistry ; Transcription Factors/biosynthesis ; Triglycerides/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 70
    Publication Date: 2013-08-02
    Description: Cancer research has been rightly and successfully focused on prevention, early detection, and identification of specific molecular targets that distinguish the malignant cells from the neighbouring benign cells. However, reducing lethal tissue injury caused by intensive chemoradiotherapy during treatment of late-stage metastatic cancers remains a key clinical challenge. Here we tested whether the induction of adult stem cells could repair chemoradiation-induced tissue injury and prolong overall survival in mice. We found that intestinal stem cells (ISCs) expressed Slit2 and its single-span transmembrane cell-surface receptor roundabout 1 (Robo1). Partial genetic deletion of Robo1 decreased ISC numbers and caused villus hypotrophy, whereas a Slit2 transgene increased ISC numbers and triggered villus hypertrophy. During lethal dosages of chemoradiation, administering a short pulse of R-spondin 1 (Rspo1; a Wnt agonist) plus Slit2 reduced ISC loss, mitigated gut impairment and protected animals from death, without concomitantly decreasing tumour sensitivity to chemotherapy. Therefore Rspo1 and Slit2 may act as therapeutic adjuvants to enhance host tolerance to aggressive chemoradiotherapy for eradicating metastatic cancers.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3888063/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3888063/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zhou, Wei-Jie -- Geng, Zhen H -- Spence, Jason R -- Geng, Jian-Guo -- CA126897/CA/NCI NIH HHS/ -- K01 DK091415/DK/NIDDK NIH HHS/ -- R01 CA126897/CA/NCI NIH HHS/ -- England -- Nature. 2013 Sep 5;501(7465):107-11. doi: 10.1038/nature12416. Epub 2013 Jul 31.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biologic and Materials Sciences, University of Michigan School of Dentistry, Ann Arbor, Michigan 48109, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23903657" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Lineage ; Cell Proliferation/drug effects ; Female ; Homeostasis/drug effects ; Intercellular Signaling Peptides and Proteins/genetics/*metabolism/pharmacology ; Intestines/*cytology/drug effects/pathology/radiation effects ; Male ; Mice ; Mice, Inbred C57BL ; Neoplasm Metastasis/drug therapy/radiotherapy ; Neoplasms/*drug therapy/pathology/*radiotherapy ; Nerve Tissue Proteins/deficiency/genetics/*metabolism/pharmacology ; Receptors, Immunologic/deficiency/genetics/metabolism ; Regeneration/drug effects/radiation effects ; Signal Transduction/drug effects ; Stem Cells/*cytology/drug effects/*metabolism/radiation effects ; Survival Rate ; Thrombospondins/administration & dosage/*metabolism/pharmacology ; Wnt Proteins/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 71
    Publication Date: 2013-03-15
    Description: The wide diversity of skeletal proportions in mammals is evident upon a survey of any natural history museum's collections and allows us to distinguish between species even when reduced to their calcified components. Similarly, each individual is comprised of a variety of bones of differing lengths. The largest contribution to the lengthening of a skeletal element, and to the differential elongation of elements, comes from a dramatic increase in the volume of hypertrophic chondrocytes in the growth plate as they undergo terminal differentiation. However, the mechanisms of chondrocyte volume enlargement have remained a mystery. Here we use quantitative phase microscopy to show that mammalian chondrocytes undergo three distinct phases of volume increase, including a phase of massive cell swelling in which the cellular dry mass is significantly diluted. In light of the tight fluid regulatory mechanisms known to control volume in many cell types, this is a remarkable mechanism for increasing cell size and regulating growth rate. It is, however, the duration of the final phase of volume enlargement by proportional dry mass increase at low density that varies most between rapidly and slowly elongating growth plates. Moreover, we find that this third phase is locally regulated through a mechanism dependent on insulin-like growth factor. This study provides a framework for understanding how skeletal size is regulated and for exploring how cells sense, modify and establish a volume set point.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3606657/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3606657/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cooper, Kimberly L -- Oh, Seungeun -- Sung, Yongjin -- Dasari, Ramachandra R -- Kirschner, Marc W -- Tabin, Clifford J -- P01 DK056246/DK/NIDDK NIH HHS/ -- P01DK056246/DK/NIDDK NIH HHS/ -- P41 EB015871/EB/NIBIB NIH HHS/ -- P41RR02594/RR/NCRR NIH HHS/ -- R01 GM026875/GM/NIGMS NIH HHS/ -- R01GM026875/GM/NIGMS NIH HHS/ -- England -- Nature. 2013 Mar 21;495(7441):375-8. doi: 10.1038/nature11940. Epub 2013 Mar 13.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Genetics, Harvard Medical School, Boston, Massachusetts 02115, USA. kcooper@genetics.med.harvard.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23485973" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bone and Bones/*cytology ; Cell Size ; Cells, Cultured ; Chondrocytes/*cytology ; Growth Plate/*cytology/*growth & development ; Insulin-Like Growth Factor I/metabolism ; Metatarsal Bones/cytology ; Mice ; Tibia/cytology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 72
    Publication Date: 2013-06-04
    Description: The generation of induced pluripotent stem (iPS) cells presents a challenge to normal developmental processes. The low efficiency and heterogeneity of most methods have hindered understanding of the precise molecular mechanisms promoting, and roadblocks preventing, efficient reprogramming. Although several intermediate populations have been described, it has proved difficult to characterize the rare, asynchronous transition from these intermediate stages to iPS cells. The rapid expansion of minor reprogrammed cells in the heterogeneous population can also obscure investigation of relevant transition processes. Understanding the biological mechanisms essential for successful iPS cell generation requires both accurate capture of cells undergoing the reprogramming process and identification of the associated global gene expression changes. Here we demonstrate that in mouse embryonic fibroblasts, reprogramming follows an orderly sequence of stage transitions, marked by changes in the cell-surface markers CD44 and ICAM1, and a Nanog-enhanced green fluorescent protein (Nanog-eGFP) reporter. RNA-sequencing analysis of these populations demonstrates two waves of pluripotency gene upregulation, and unexpectedly, transient upregulation of several epidermis-related genes, demonstrating that reprogramming is not simply the reversal of the normal developmental processes. This novel high-resolution analysis enables the construction of a detailed reprogramming route map, and the improved understanding of the reprogramming process will lead to new reprogramming strategies.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3743022/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3743022/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉O'Malley, James -- Skylaki, Stavroula -- Iwabuchi, Kumiko A -- Chantzoura, Eleni -- Ruetz, Tyson -- Johnsson, Anna -- Tomlinson, Simon R -- Linnarsson, Sten -- Kaji, Keisuke -- 261075/European Research Council/International -- Medical Research Council/United Kingdom -- England -- Nature. 2013 Jul 4;499(7456):88-91. doi: 10.1038/nature12243. Epub 2013 Jun 2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉MRC Centre for Regenerative Medicine, University of Edinburgh, Edinburgh BioQuarter, 5 Little France Drive, Edinburgh EH16 4UU, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23728301" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, CD44/genetics/*metabolism ; Biomarkers/analysis/metabolism ; Cellular Reprogramming/genetics/*physiology ; Epidermis/metabolism ; Fibroblasts ; Flow Cytometry ; Gene Expression Profiling ; Genes, Reporter ; Induced Pluripotent Stem Cells/*cytology/*metabolism ; Intercellular Adhesion Molecule-1/genetics/*metabolism ; Mice ; Sequence Analysis, RNA ; Single-Cell Analysis ; Up-Regulation/genetics
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 73
    Publication Date: 2013-04-16
    Description: CRISPR/Cas (clustered regularly interspaced palindromic repeats/CRISPR-associated) systems are a bacterial defence against invading foreign nucleic acids derived from bacteriophages or exogenous plasmids. These systems use an array of small CRISPR RNAs (crRNAs) consisting of repetitive sequences flanking unique spacers to recognize their targets, and conserved Cas proteins to mediate target degradation. Recent studies have suggested that these systems may have broader functions in bacterial physiology, and it is unknown if they regulate expression of endogenous genes. Here we demonstrate that the Cas protein Cas9 of Francisella novicida uses a unique, small, CRISPR/Cas-associated RNA (scaRNA) to repress an endogenous transcript encoding a bacterial lipoprotein. As bacterial lipoproteins trigger a proinflammatory innate immune response aimed at combating pathogens, CRISPR/Cas-mediated repression of bacterial lipoprotein expression is critical for F. novicida to dampen this host response and promote virulence. Because Cas9 proteins are highly enriched in pathogenic and commensal bacteria, our work indicates that CRISPR/Cas-mediated gene regulation may broadly contribute to the regulation of endogenous bacterial genes, particularly during the interaction of such bacteria with eukaryotic hosts.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3651764/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3651764/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sampson, Timothy R -- Saroj, Sunil D -- Llewellyn, Anna C -- Tzeng, Yih-Ling -- Weiss, David S -- R56 AI061031/AI/NIAID NIH HHS/ -- R56 AI087673/AI/NIAID NIH HHS/ -- R56-AI061031/AI/NIAID NIH HHS/ -- R56-AI87673/AI/NIAID NIH HHS/ -- U54 AI057157/AI/NIAID NIH HHS/ -- U54-AI057157/AI/NIAID NIH HHS/ -- England -- Nature. 2013 May 9;497(7448):254-7. doi: 10.1038/nature12048. Epub 2013 Apr 14.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Microbiology and Molecular Genetics Program, Department of Microbiology and Immunology, Emory University, Atlanta, Georgia 30329, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23584588" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Female ; Gammaproteobacteria/genetics/*immunology/metabolism/*pathogenicity ; Genes, Bacterial/genetics ; Host-Pathogen Interactions/immunology ; *Immune Evasion ; Immunity, Innate/*immunology ; Mice ; Mice, Inbred C57BL ; Phylogeny ; RNA, Bacterial/genetics/metabolism ; Time Factors ; Toll-Like Receptor 2/immunology/metabolism ; Virulence/genetics
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 74
    Publication Date: 2013-08-24
    Description: Nociceptor sensory neurons are specialized to detect potentially damaging stimuli, protecting the organism by initiating the sensation of pain and eliciting defensive behaviours. Bacterial infections produce pain by unknown molecular mechanisms, although they are presumed to be secondary to immune activation. Here we demonstrate that bacteria directly activate nociceptors, and that the immune response mediated through TLR2, MyD88, T cells, B cells, and neutrophils and monocytes is not necessary for Staphylococcus aureus-induced pain in mice. Mechanical and thermal hyperalgesia in mice is correlated with live bacterial load rather than tissue swelling or immune activation. Bacteria induce calcium flux and action potentials in nociceptor neurons, in part via bacterial N-formylated peptides and the pore-forming toxin alpha-haemolysin, through distinct mechanisms. Specific ablation of Nav1.8-lineage neurons, which include nociceptors, abrogated pain during bacterial infection, but concurrently increased local immune infiltration and lymphadenopathy of the draining lymph node. Thus, bacterial pathogens produce pain by directly activating sensory neurons that modulate inflammation, an unsuspected role for the nervous system in host-pathogen interactions.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3773968/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3773968/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chiu, Isaac M -- Heesters, Balthasar A -- Ghasemlou, Nader -- Von Hehn, Christian A -- Zhao, Fan -- Tran, Johnathan -- Wainger, Brian -- Strominger, Amanda -- Muralidharan, Sriya -- Horswill, Alexander R -- Bubeck Wardenburg, Juliane -- Hwang, Sun Wook -- Carroll, Michael C -- Woolf, Clifford J -- 5F32NS076297/NS/NINDS NIH HHS/ -- 5P01NS072040/NS/NINDS NIH HHS/ -- 5R01AI039246/AI/NIAID NIH HHS/ -- P01 NS072040/NS/NINDS NIH HHS/ -- P01AI078897/AI/NIAID NIH HHS/ -- P30 HD018655/HD/NICHD NIH HHS/ -- P30-HD018655/HD/NICHD NIH HHS/ -- R01 AI039246/AI/NIAID NIH HHS/ -- R01 NS039518/NS/NINDS NIH HHS/ -- R37 NS039518/NS/NINDS NIH HHS/ -- R37NS039518/NS/NINDS NIH HHS/ -- England -- Nature. 2013 Sep 5;501(7465):52-7. doi: 10.1038/nature12479. Epub 2013 Aug 21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Kirby Neurobiology Center, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23965627" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Animals ; Bacterial Load ; Calcium Signaling ; Female ; Hemolysin Proteins/metabolism ; Host-Pathogen Interactions ; Hot Temperature ; Hyperalgesia/microbiology ; Immunity, Innate ; Inflammation/immunology/metabolism/*microbiology/pathology ; Lymphatic Diseases/immunology/microbiology/pathology ; Male ; Mice ; Mice, Inbred C57BL ; Monocytes ; Myeloid Differentiation Factor 88/immunology ; N-Formylmethionine Leucyl-Phenylalanine/metabolism ; NAV1.8 Voltage-Gated Sodium Channel/deficiency/immunology/metabolism ; Neutrophils ; Nociceptors/*metabolism ; Pain/immunology/metabolism/*microbiology/*physiopathology ; Protein Stability ; Staphylococcal Infections/immunology/metabolism/microbiology ; Staphylococcus aureus/immunology/metabolism/*pathogenicity ; Toll-Like Receptor 2/immunology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 75
    Publication Date: 2013-10-25
    Description: Food intake increases the activity of hepatic de novo lipogenesis, which mediates the conversion of glucose to fats for storage or use. In mice, this program follows a circadian rhythm that peaks with nocturnal feeding and is repressed by Rev-erbalpha/beta and an HDAC3-containing complex during the day. The transcriptional activators controlling rhythmic lipid synthesis in the dark cycle remain poorly defined. Disturbances in hepatic lipogenesis are also associated with systemic metabolic phenotypes, suggesting that lipogenesis in the liver communicates with peripheral tissues to control energy substrate homeostasis. Here we identify a PPARdelta-dependent de novo lipogenic pathway in the liver that modulates fat use by muscle via a circulating lipid. The nuclear receptor PPARdelta controls diurnal expression of lipogenic genes in the dark/feeding cycle. Liver-specific PPARdelta activation increases, whereas hepatocyte-Ppard deletion reduces, muscle fatty acid uptake. Unbiased metabolite profiling identifies phosphatidylcholine 18:0/18:1 (PC(18:0/18:1) as a serum lipid regulated by diurnal hepatic PPARdelta activity. PC(18:0/18:1) reduces postprandial lipid levels and increases fatty acid use through muscle PPARalpha. High-fat feeding diminishes rhythmic production of PC(18:0/18:1), whereas PC(18:0/18:1) administration in db/db mice (also known as Lepr(-/-)) improves metabolic homeostasis. These findings reveal an integrated regulatory circuit coupling lipid synthesis in the liver to energy use in muscle by coordinating the activity of two closely related nuclear receptors. These data implicate alterations in diurnal hepatic PPARdelta-PC(18:0/18:1) signalling in metabolic disorders, including obesity.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4141623/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4141623/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Liu, Sihao -- Brown, Jonathan D -- Stanya, Kristopher J -- Homan, Edwin -- Leidl, Mathias -- Inouye, Karen -- Bhargava, Prerna -- Gangl, Matthew R -- Dai, Lingling -- Hatano, Ben -- Hotamisligil, Gokhan S -- Saghatelian, Alan -- Plutzky, Jorge -- Lee, Chih-Hao -- K08 HL105678/HL/NHLBI NIH HHS/ -- K08HL105678/HL/NHLBI NIH HHS/ -- P01 HL048743/HL/NHLBI NIH HHS/ -- R01 DK075046/DK/NIDDK NIH HHS/ -- R01DK075046/DK/NIDDK NIH HHS/ -- R01HL048743/HL/NHLBI NIH HHS/ -- T32 ES016645/ES/NIEHS NIH HHS/ -- England -- Nature. 2013 Oct 24;502(7472):550-4. doi: 10.1038/nature12710.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] Department of Genetics and Complex Diseases, Division of Biological Sciences, Harvard School of Public Health, 665 Huntington Avenue, Boston, Massachusetts 02115, USA [2].〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24153306" target="_blank"〉PubMed〈/a〉
    Keywords: Acetyl-CoA Carboxylase/metabolism ; Animals ; *Circadian Rhythm ; Diabetes Mellitus/metabolism ; Fatty Acids/*metabolism ; Gene Expression Regulation ; Homeostasis ; Lipids/*blood ; *Lipogenesis/genetics ; Liver/*metabolism ; Male ; Mice ; Mice, Inbred C57BL ; Muscles/metabolism ; Obesity/metabolism ; PPAR delta/metabolism ; Phosphatidylcholines/blood ; Principal Component Analysis
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 76
    Publication Date: 2013-07-19
    Description: Down's syndrome is a common disorder with enormous medical and social costs, caused by trisomy for chromosome 21. We tested the concept that gene imbalance across an extra chromosome can be de facto corrected by manipulating a single gene, XIST (the X-inactivation gene). Using genome editing with zinc finger nucleases, we inserted a large, inducible XIST transgene into the DYRK1A locus on chromosome 21, in Down's syndrome pluripotent stem cells. The XIST non-coding RNA coats chromosome 21 and triggers stable heterochromatin modifications, chromosome-wide transcriptional silencing and DNA methylation to form a 'chromosome 21 Barr body'. This provides a model to study human chromosome inactivation and creates a system to investigate genomic expression changes and cellular pathologies of trisomy 21, free from genetic and epigenetic noise. Notably, deficits in proliferation and neural rosette formation are rapidly reversed upon silencing one chromosome 21. Successful trisomy silencing in vitro also surmounts the major first step towards potential development of 'chromosome therapy'.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3848249/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3848249/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jiang, Jun -- Jing, Yuanchun -- Cost, Gregory J -- Chiang, Jen-Chieh -- Kolpa, Heather J -- Cotton, Allison M -- Carone, Dawn M -- Carone, Benjamin R -- Shivak, David A -- Guschin, Dmitry Y -- Pearl, Jocelynn R -- Rebar, Edward J -- Byron, Meg -- Gregory, Philip D -- Brown, Carolyn J -- Urnov, Fyodor D -- Hall, Lisa L -- Lawrence, Jeanne B -- 1F32CA154086/CA/NCI NIH HHS/ -- 2T32HD007439/HD/NICHD NIH HHS/ -- F32 CA154086/CA/NCI NIH HHS/ -- GM053234/GM/NIGMS NIH HHS/ -- GM085548/GM/NIGMS NIH HHS/ -- GM096400 RC4/GM/NIGMS NIH HHS/ -- MOP-13680/Canadian Institutes of Health Research/Canada -- R01 GM053234/GM/NIGMS NIH HHS/ -- R01 GM085548/GM/NIGMS NIH HHS/ -- RC4 GM096400/GM/NIGMS NIH HHS/ -- T32 HD007439/HD/NICHD NIH HHS/ -- England -- Nature. 2013 Aug 15;500(7462):296-300. doi: 10.1038/nature12394. Epub 2013 Jul 17.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell and Developmental Biology, University of Massachusetts Medical School, 55 Lake Avenue North, Worcester, Massachusetts 01655, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23863942" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Cell Proliferation ; Chromosomes, Human, Pair 21/*genetics ; DNA Methylation ; *Dosage Compensation, Genetic ; Down Syndrome/*genetics/therapy ; Gene Silencing ; Humans ; Induced Pluripotent Stem Cells ; Male ; Mice ; Mutagenesis, Insertional ; Neurogenesis ; RNA, Long Noncoding/genetics/*metabolism ; Sex Chromatin/genetics ; X Chromosome Inactivation/genetics
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 77
    facet.materialart.
    Unknown
    Nature Publishing Group (NPG)
    Publication Date: 2013-12-20
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bourzac, Katherine -- England -- Nature. 2013 Dec 19;504(7480):S10-2. doi: 10.1038/504S10a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24352358" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Tracking ; Disease Models, Animal ; Humans ; Immunotherapy ; Mice ; Microscopy, Fluorescence, Multiphoton ; *Molecular Imaging ; Neoplasms/diagnosis/*immunology/*pathology/therapy
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 78
    Publication Date: 2013-05-03
    Description: There is a pressing need to develop alternatives to annual influenza vaccines and antiviral agents licensed for mitigating influenza infection. Previous studies reported that acute lung injury caused by chemical or microbial insults is secondary to the generation of host-derived, oxidized phospholipid that potently stimulates Toll-like receptor 4 (TLR4)-dependent inflammation. Subsequently, we reported that Tlr4(-/-) mice are highly refractory to influenza-induced lethality, and proposed that therapeutic antagonism of TLR4 signalling would protect against influenza-induced acute lung injury. Here we report that therapeutic administration of Eritoran (also known as E5564)-a potent, well-tolerated, synthetic TLR4 antagonist-blocks influenza-induced lethality in mice, as well as lung pathology, clinical symptoms, cytokine and oxidized phospholipid expression, and decreases viral titres. CD14 and TLR2 are also required for Eritoran-mediated protection, and CD14 directly binds Eritoran and inhibits ligand binding to MD2. Thus, Eritoran blockade of TLR signalling represents a novel therapeutic approach for inflammation associated with influenza, and possibly other infections.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3725830/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3725830/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shirey, Kari Ann -- Lai, Wendy -- Scott, Alison J -- Lipsky, Michael -- Mistry, Pragnesh -- Pletneva, Lioubov M -- Karp, Christopher L -- McAlees, Jaclyn -- Gioannini, Theresa L -- Weiss, Jerrold -- Chen, Wilbur H -- Ernst, Robert K -- Rossignol, Daniel P -- Gusovsky, Fabian -- Blanco, Jorge C G -- Vogel, Stefanie N -- AI018797/AI/NIAID NIH HHS/ -- AI057575/AI/NIAID NIH HHS/ -- AI059372/AI/NIAID NIH HHS/ -- NCRR K12-RR-023250/PHS HHS/ -- R01 AI018797/AI/NIAID NIH HHS/ -- R01 AI057575/AI/NIAID NIH HHS/ -- R01 AI059372/AI/NIAID NIH HHS/ -- T32 AI007540/AI/NIAID NIH HHS/ -- England -- Nature. 2013 May 23;497(7450):498-502. doi: 10.1038/nature12118. Epub 2013 May 1.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology and Immunology, University of Maryland, Baltimore, Baltimore, Maryland 21201, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23636320" target="_blank"〉PubMed〈/a〉
    Keywords: Acute Lung Injury/complications/drug therapy/pathology/prevention & control ; Animals ; Antigens, CD14/metabolism ; Antiviral Agents/*pharmacology/therapeutic use ; Cytokines/genetics/immunology ; Disaccharides/metabolism/*pharmacology/*therapeutic use ; Female ; Influenza A Virus, H1N1 Subtype/*drug effects/*pathogenicity ; Ligands ; Lymphocyte Antigen 96/metabolism ; Mice ; Mice, Inbred C57BL ; Orthomyxoviridae Infections/*drug therapy/immunology/pathology/virology ; Sugar Phosphates/metabolism/*pharmacology/*therapeutic use ; Survival Analysis ; Time Factors ; Toll-Like Receptor 2/immunology/metabolism ; Toll-Like Receptor 4/*antagonists & inhibitors/immunology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 79
    Publication Date: 2013-09-03
    Description: Topoisomerases are expressed throughout the developing and adult brain and are mutated in some individuals with autism spectrum disorder (ASD). However, how topoisomerases are mechanistically connected to ASD is unknown. Here we find that topotecan, a topoisomerase 1 (TOP1) inhibitor, dose-dependently reduces the expression of extremely long genes in mouse and human neurons, including nearly all genes that are longer than 200 kilobases. Expression of long genes is also reduced after knockdown of Top1 or Top2b in neurons, highlighting that both enzymes are required for full expression of long genes. By mapping RNA polymerase II density genome-wide in neurons, we found that this length-dependent effect on gene expression was due to impaired transcription elongation. Interestingly, many high-confidence ASD candidate genes are exceptionally long and were reduced in expression after TOP1 inhibition. Our findings suggest that chemicals and genetic mutations that impair topoisomerases could commonly contribute to ASD and other neurodevelopmental disorders.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3767287/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3767287/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉King, Ian F -- Yandava, Chandri N -- Mabb, Angela M -- Hsiao, Jack S -- Huang, Hsien-Sung -- Pearson, Brandon L -- Calabrese, J Mauro -- Starmer, Joshua -- Parker, Joel S -- Magnuson, Terry -- Chamberlain, Stormy J -- Philpot, Benjamin D -- Zylka, Mark J -- P30 NS045892/NS/NINDS NIH HHS/ -- P30HD03110/HD/NICHD NIH HHS/ -- P30NS045892/NS/NINDS NIH HHS/ -- R01 GM101974/GM/NIGMS NIH HHS/ -- R01 HD068730/HD/NICHD NIH HHS/ -- R01 MH093372/MH/NIMH NIH HHS/ -- R01GM101974/GM/NIGMS NIH HHS/ -- R01HD068730/HD/NICHD NIH HHS/ -- R01MH093372/MH/NIMH NIH HHS/ -- T32 HD040127/HD/NICHD NIH HHS/ -- T32HD040127/HD/NICHD NIH HHS/ -- England -- Nature. 2013 Sep 5;501(7465):58-62. doi: 10.1038/nature12504. Epub 2013 Aug 28.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell Biology and Physiology, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23995680" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Autistic Disorder/*genetics ; DNA Topoisomerases, Type I/deficiency/*metabolism ; DNA Topoisomerases, Type II/deficiency/metabolism ; DNA-Binding Proteins/antagonists & inhibitors/deficiency/metabolism ; Gene Knockdown Techniques ; Genomic Imprinting/genetics ; Humans ; Mice ; Mutation/genetics ; RNA Polymerase II/metabolism ; Synapses/metabolism ; Topoisomerase Inhibitors/pharmacology ; Topotecan/pharmacology ; *Transcription Elongation, Genetic/drug effects
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 80
    Publication Date: 2013-02-08
    Description: Blood production is ensured by rare, self-renewing haematopoietic stem cells (HSCs). How HSCs accommodate the diverse cellular stresses associated with their life-long activity remains elusive. Here we identify autophagy as an essential mechanism protecting HSCs from metabolic stress. We show that mouse HSCs, in contrast to their short-lived myeloid progeny, robustly induce autophagy after ex vivo cytokine withdrawal and in vivo calorie restriction. We demonstrate that FOXO3A is critical to maintain a gene expression program that poises HSCs for rapid induction of autophagy upon starvation. Notably, we find that old HSCs retain an intact FOXO3A-driven pro-autophagy gene program, and that ongoing autophagy is needed to mitigate an energy crisis and allow their survival. Our results demonstrate that autophagy is essential for the life-long maintenance of the HSC compartment and for supporting an old, failing blood system.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3579002/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3579002/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Warr, Matthew R -- Binnewies, Mikhail -- Flach, Johanna -- Reynaud, Damien -- Garg, Trit -- Malhotra, Ritu -- Debnath, Jayanta -- Passegue, Emmanuelle -- CA126792/CA/NCI NIH HHS/ -- HL092471/HL/NHLBI NIH HHS/ -- R01 CA126792/CA/NCI NIH HHS/ -- R01 CA184014/CA/NCI NIH HHS/ -- R01 HL111266/HL/NHLBI NIH HHS/ -- England -- Nature. 2013 Feb 21;494(7437):323-7. doi: 10.1038/nature11895. Epub 2013 Feb 6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research, Department of Medicine, Division of Hematology/Oncology, University of California San Francisco, San Francisco, California 94143, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23389440" target="_blank"〉PubMed〈/a〉
    Keywords: Aging ; Animals ; Apoptosis ; Autophagy/*genetics ; Caloric Restriction ; Cell Aging ; Cell Survival/genetics ; Cytokines/deficiency/metabolism ; Energy Metabolism/*genetics ; Food Deprivation ; Forkhead Transcription Factors/*metabolism ; *Gene Expression Regulation ; Hematopoietic Stem Cells/*cytology/*metabolism ; Homeostasis ; Mice ; Mice, Inbred C57BL ; Stress, Physiological/*genetics
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 81
    Publication Date: 2013-02-05
    Description: Cancer control by adaptive immunity involves a number of defined death and clearance mechanisms. However, efficient inhibition of exponential cancer growth by T cells and interferon-gamma (IFN-gamma) requires additional undefined mechanisms that arrest cancer cell proliferation. Here we show that the combined action of the T-helper-1-cell cytokines IFN-gamma and tumour necrosis factor (TNF) directly induces permanent growth arrest in cancers. To safely separate senescence induced by tumour immunity from oncogene-induced senescence, we used a mouse model in which the Simian virus 40 large T antigen (Tag) expressed under the control of the rat insulin promoter creates tumours by attenuating p53- and Rb-mediated cell cycle control. When combined, IFN-gamma and TNF drive Tag-expressing cancers into senescence by inducing permanent growth arrest in G1/G0, activation of p16INK4a (also known as CDKN2A), and downstream Rb hypophosphorylation at serine 795. This cytokine-induced senescence strictly requires STAT1 and TNFR1 (also known as TNFRSF1A) signalling in addition to p16INK4a. In vivo, Tag-specific T-helper 1 cells permanently arrest Tag-expressing cancers by inducing IFN-gamma- and TNFR1-dependent senescence. Conversely, Tnfr1(-/-)Tag-expressing cancers resist cytokine-induced senescence and grow aggressively, even in TNFR1-expressing hosts. Finally, as IFN-gamma and TNF induce senescence in numerous murine and human cancers, this may be a general mechanism for arresting cancer progression.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Braumuller, Heidi -- Wieder, Thomas -- Brenner, Ellen -- Assmann, Sonja -- Hahn, Matthias -- Alkhaled, Mohammed -- Schilbach, Karin -- Essmann, Frank -- Kneilling, Manfred -- Griessinger, Christoph -- Ranta, Felicia -- Ullrich, Susanne -- Mocikat, Ralph -- Braungart, Kilian -- Mehra, Tarun -- Fehrenbacher, Birgit -- Berdel, Julia -- Niessner, Heike -- Meier, Friedegund -- van den Broek, Maries -- Haring, Hans-Ulrich -- Handgretinger, Rupert -- Quintanilla-Martinez, Leticia -- Fend, Falko -- Pesic, Marina -- Bauer, Jurgen -- Zender, Lars -- Schaller, Martin -- Schulze-Osthoff, Klaus -- Rocken, Martin -- England -- Nature. 2013 Feb 21;494(7437):361-5. doi: 10.1038/nature11824. Epub 2013 Feb 3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Dermatology, Eberhard Karls University, Liebermeister Strasse 25, 72076 Tubingen, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23376950" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, Polyomavirus Transforming/genetics/metabolism ; Cell Aging/*immunology ; Cell Cycle ; Cell Proliferation ; Cyclin-Dependent Kinase Inhibitor p16/deficiency/genetics/metabolism ; Cytokines/*immunology ; Disease Models, Animal ; Disease Progression ; Female ; Humans ; Interferon-gamma/immunology ; Male ; Mice ; Mice, Inbred NOD ; Mice, SCID ; Mice, Transgenic ; Neoplasms/*immunology/*pathology ; Oncogenes/genetics ; Phosphoserine/metabolism ; Receptors, Tumor Necrosis Factor, Type I/metabolism ; Retinoblastoma Protein/chemistry/metabolism ; STAT1 Transcription Factor/metabolism ; Th1 Cells/*immunology ; Time Factors ; Tumor Cells, Cultured ; Tumor Necrosis Factor-alpha/immunology ; Tumor Suppressor Protein p53/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 82
    facet.materialart.
    Unknown
    Nature Publishing Group (NPG)
    Publication Date: 2013-11-05
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gwynne, Peter -- England -- Nature. 2013 Oct 31;502(7473):S96-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24187706" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Diagnostic Imaging/contraindications/instrumentation/*methods/*trends ; Glucose/metabolism ; Humans ; Magnetic Resonance Angiography/methods ; Mice ; Neoplasms/diagnosis/metabolism ; Ultrasonography/instrumentation/trends
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 83
    Publication Date: 2013-10-08
    Description: In the mammalian cerebral cortex the diversity of interneuronal subtypes underlies a division of labour subserving distinct modes of inhibitory control. A unique mode of inhibitory control may be provided by inhibitory neurons that specifically suppress the firing of other inhibitory neurons. Such disinhibition could lead to the selective amplification of local processing and serve the important computational functions of gating and gain modulation. Although several interneuron populations are known to target other interneurons to varying degrees, little is known about interneurons specializing in disinhibition and their in vivo function. Here we show that a class of interneurons that express vasoactive intestinal polypeptide (VIP) mediates disinhibitory control in multiple areas of neocortex and is recruited by reinforcement signals. By combining optogenetic activation with single-cell recordings, we examined the functional role of VIP interneurons in awake mice, and investigated the underlying circuit mechanisms in vitro in auditory and medial prefrontal cortices. We identified a basic disinhibitory circuit module in which activation of VIP interneurons transiently suppresses primarily somatostatin- and a fraction of parvalbumin-expressing inhibitory interneurons that specialize in the control of the input and output of principal cells, respectively. During the performance of an auditory discrimination task, reinforcement signals (reward and punishment) strongly and uniformly activated VIP neurons in auditory cortex, and in turn VIP recruitment increased the gain of a functional subpopulation of principal neurons. These results reveal a specific cell type and microcircuit underlying disinhibitory control in cortex and demonstrate that it is activated under specific behavioural conditions.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4017628/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4017628/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pi, Hyun-Jae -- Hangya, Balazs -- Kvitsiani, Duda -- Sanders, Joshua I -- Huang, Z Josh -- Kepecs, Adam -- R01 NS075531/NS/NINDS NIH HHS/ -- R01NS075531/NS/NINDS NIH HHS/ -- U01 MH078844/MH/NIMH NIH HHS/ -- U01MH078844/MH/NIMH NIH HHS/ -- England -- Nature. 2013 Nov 28;503(7477):521-4. doi: 10.1038/nature12676. Epub 2013 Oct 6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Cold Spring Harbor Laboratory, 1 Bungtown Road, Cold Spring Harbor, New York 11724, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24097352" target="_blank"〉PubMed〈/a〉
    Keywords: Acoustic Stimulation ; Animals ; Auditory Cortex/physiology ; Cerebral Cortex/*cytology/*physiology ; Discrimination (Psychology)/physiology ; Female ; Interneurons/*physiology ; Male ; Mice ; Mice, Inbred C57BL ; Neural Inhibition/*physiology ; Optogenetics ; Parvalbumins/metabolism ; Prefrontal Cortex/physiology ; Punishment ; Reward ; Single-Cell Analysis ; Somatostatin/metabolism ; Vasoactive Intestinal Peptide/metabolism ; Wakefulness/physiology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 84
    Publication Date: 2013-01-29
    Description: The basal ganglia are subcortical nuclei that control voluntary actions, and they are affected by a number of debilitating neurological disorders. The prevailing model of basal ganglia function proposes that two orthogonal projection circuits originating from distinct populations of spiny projection neurons (SPNs) in the striatum--the so-called direct and indirect pathways--have opposing effects on movement: activity of direct-pathway SPNs is thought to facilitate movement, whereas activity of indirect-pathway SPNs is presumed to inhibit movement. This model has been difficult to test owing to the lack of methods to selectively measure the activity of direct- and indirect-pathway SPNs in freely moving animals. Here we develop a novel in vivo method to specifically measure direct- and indirect-pathway SPN activity, using Cre-dependent viral expression of the genetically encoded calcium indicator (GECI) GCaMP3 in the dorsal striatum of D1-Cre (direct-pathway-specific) and A2A-Cre (indirect-pathway-specific) mice. Using fibre optics and time-correlated single-photon counting (TCSPC) in mice performing an operant task, we observed transient increases in neural activity in both direct- and indirect-pathway SPNs when animals initiated actions, but not when they were inactive. Concurrent activation of SPNs from both pathways in one hemisphere preceded the initiation of contraversive movements and predicted the occurrence of specific movements within 500 ms. These observations challenge the classical view of basal ganglia function and may have implications for understanding the origin of motor symptoms in basal ganglia disorders.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4039389/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4039389/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cui, Guohong -- Jun, Sang Beom -- Jin, Xin -- Pham, Michael D -- Vogel, Steven S -- Lovinger, David M -- Costa, Rui M -- 243393/European Research Council/International -- ZIA AA000407-12/Intramural NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2013 Feb 14;494(7436):238-42. doi: 10.1038/nature11846. Epub 2013 Jan 23.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Section on In Vivo Neural Function, Laboratory for Integrative Neuroscience, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, Maryland 20892-9412, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23354054" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Calcium Signaling ; Female ; Fiber Optic Technology/methods ; Fluorescence ; Integrases/genetics/metabolism ; Luminescent Measurements/methods ; Male ; Mice ; Models, Neurological ; Movement/*physiology ; Neostriatum/*cytology/*physiology ; Neural Pathways/*physiology ; Parkinson Disease ; Photons
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 85
    Publication Date: 2013-04-05
    Description: Sensory processing occurs in neocortical microcircuits in which synaptic connectivity is highly structured and excitatory neurons form subnetworks that process related sensory information. However, the developmental mechanisms underlying the formation of functionally organized connectivity in cortical microcircuits remain unknown. Here we directly relate patterns of excitatory synaptic connectivity to visual response properties of neighbouring layer 2/3 pyramidal neurons in mouse visual cortex at different postnatal ages, using two-photon calcium imaging in vivo and multiple whole-cell recordings in vitro. Although neural responses were already highly selective for visual stimuli at eye opening, neurons responding to similar visual features were not yet preferentially connected, indicating that the emergence of feature selectivity does not depend on the precise arrangement of local synaptic connections. After eye opening, local connectivity reorganized extensively: more connections formed selectively between neurons with similar visual responses and connections were eliminated between visually unresponsive neurons, but the overall connectivity rate did not change. We propose a sequential model of cortical microcircuit development based on activity-dependent mechanisms of plasticity whereby neurons first acquire feature preference by selecting feedforward inputs before the onset of sensory experience--a process that may be facilitated by early electrical coupling between neuronal subsets--and then patterned input drives the formation of functional subnetworks through a redistribution of recurrent synaptic connections.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ko, Ho -- Cossell, Lee -- Baragli, Chiara -- Antolik, Jan -- Clopath, Claudia -- Hofer, Sonja B -- Mrsic-Flogel, Thomas D -- Medical Research Council/United Kingdom -- Wellcome Trust/United Kingdom -- England -- Nature. 2013 Apr 4;496(7443):96-100. doi: 10.1038/nature12015.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neuroscience, Physiology and Pharmacology, University College London, 21 University Street, London WC1E 6DE, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23552948" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Newborn ; Eye ; Eyelids/physiology ; Mice ; Mice, Inbred C57BL ; *Models, Neurological ; Movement ; Neural Pathways/*physiology ; Neuronal Plasticity/physiology ; Pyramidal Cells/cytology/physiology ; Synapses/metabolism/physiology ; Visual Cortex/cytology/*physiology ; Visual Perception/*physiology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 86
    Publication Date: 2013-07-26
    Description: It is becoming increasingly clear that the shape of the genome importantly influences transcription regulation. Pluripotent stem cells such as embryonic stem cells were recently shown to organize their chromosomes into topological domains that are largely invariant between cell types. Here we combine chromatin conformation capture technologies with chromatin factor binding data to demonstrate that inactive chromatin is unusually disorganized in pluripotent stem-cell nuclei. We show that gene promoters engage in contacts between topological domains in a largely tissue-independent manner, whereas enhancers have a more tissue-restricted interaction profile. Notably, genomic clusters of pluripotency factor binding sites find each other very efficiently, in a manner that is strictly pluripotent-stem-cell-specific, dependent on the presence of Oct4 and Nanog protein and inducible after artificial recruitment of Nanog to a selected chromosomal site. We conclude that pluripotent stem cells have a unique higher-order genome structure shaped by pluripotency factors. We speculate that this interactome enhances the robustness of the pluripotent state.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉de Wit, Elzo -- Bouwman, Britta A M -- Zhu, Yun -- Klous, Petra -- Splinter, Erik -- Verstegen, Marjon J A M -- Krijger, Peter H L -- Festuccia, Nicola -- Nora, Elphege P -- Welling, Maaike -- Heard, Edith -- Geijsen, Niels -- Poot, Raymond A -- Chambers, Ian -- de Laat, Wouter -- G0901533/Medical Research Council/United Kingdom -- England -- Nature. 2013 Sep 12;501(7466):227-31. doi: 10.1038/nature12420. Epub 2013 Jul 24.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Hubrecht Institute-KNAW & University Medical Center Utrecht, Uppsalalaan 8, 3584 CT Utrecht, The Netherlands.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23883933" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Binding Sites ; Cell Line ; Chromatin/*chemistry/genetics/*metabolism ; Chromatin Immunoprecipitation ; *Chromosome Positioning ; Embryonic Stem Cells/cytology/metabolism ; Enhancer Elements, Genetic ; Genome/*genetics ; Homeodomain Proteins/metabolism ; *Imaging, Three-Dimensional ; Induced Pluripotent Stem Cells/cytology/metabolism ; Mice ; Molecular Imaging ; Octamer Transcription Factor-3/metabolism ; Organ Specificity ; Pluripotent Stem Cells/*cytology/*metabolism ; Promoter Regions, Genetic ; SOXB1 Transcription Factors/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 87
    Publication Date: 2013-12-07
    Description: To sustain neurotransmission, synaptic vesicles and their associated proteins must be recycled locally at synapses. Synaptic vesicles are thought to be regenerated approximately 20 s after fusion by the assembly of clathrin scaffolds or in approximately 1 s by the reversal of fusion pores via 'kiss-and-run' endocytosis. Here we use optogenetics to stimulate cultured hippocampal neurons with a single stimulus, rapidly freeze them after fixed intervals and examine the ultrastructure using electron microscopy--'flash-and-freeze' electron microscopy. Docked vesicles fuse and collapse into the membrane within 30 ms of the stimulus. Compensatory endocytosis occurs within 50 to 100 ms at sites flanking the active zone. Invagination is blocked by inhibition of actin polymerization, and scission is blocked by inhibiting dynamin. Because intact synaptic vesicles are not recovered, this form of recycling is not compatible with kiss-and-run endocytosis; moreover, it is 200-fold faster than clathrin-mediated endocytosis. It is likely that 'ultrafast endocytosis' is specialized to restore the surface area of the membrane rapidly.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3957339/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3957339/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Watanabe, Shigeki -- Rost, Benjamin R -- Camacho-Perez, Marcial -- Davis, M Wayne -- Sohl-Kielczynski, Berit -- Rosenmund, Christian -- Jorgensen, Erik M -- NS034307/NS/NINDS NIH HHS/ -- R01 NS034307/NS/NINDS NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2013 Dec 12;504(7479):242-7. doi: 10.1038/nature12809. Epub 2013 Dec 4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology and Howard Hughes Medical Institute, University of Utah, Salt Lake City 84112, Utah, USA. ; 1] Neuroscience Research Centre, Charite Universitatsmedizin, 10117 Berlin, Germany [2] German Center for Neurodegenerative Diseases (DZNE), 10117 Berlin, Germany. [3]. ; 1] Neuroscience Research Centre, Charite Universitatsmedizin, 10117 Berlin, Germany [2]. ; Neuroscience Research Centre, Charite Universitatsmedizin, 10117 Berlin, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24305055" target="_blank"〉PubMed〈/a〉
    Keywords: Actins/metabolism/ultrastructure ; Action Potentials ; Animals ; Dynamins/metabolism/ultrastructure ; *Endocytosis ; Exocytosis ; Hippocampus/*cytology ; Membrane Fusion ; Mice ; Microscopy, Electron ; Rhodopsin/genetics/metabolism ; Synapses/*metabolism/ultrastructure ; Synaptic Transmission ; Synaptic Vesicles/metabolism/ultrastructure ; Time Factors
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 88
    Publication Date: 2013-07-19
    Description: Phosphorylated sphingolipids ceramide-1-phosphate (C1P) and sphingosine-1-phosphate (S1P) have emerged as key regulators of cell growth, survival, migration and inflammation. C1P produced by ceramide kinase is an activator of group IVA cytosolic phospholipase A2alpha (cPLA2alpha), the rate-limiting releaser of arachidonic acid used for pro-inflammatory eicosanoid production, which contributes to disease pathogenesis in asthma or airway hyper-responsiveness, cancer, atherosclerosis and thrombosis. To modulate eicosanoid action and avoid the damaging effects of chronic inflammation, cells require efficient targeting, trafficking and presentation of C1P to specific cellular sites. Vesicular trafficking is likely but non-vesicular mechanisms for C1P sensing, transfer and presentation remain unexplored. Moreover, the molecular basis for selective recognition and binding among signalling lipids with phosphate headgroups, namely C1P, phosphatidic acid or their lyso-derivatives, remains unclear. Here, a ubiquitously expressed lipid transfer protein, human GLTPD1, named here CPTP, is shown to specifically transfer C1P between membranes. Crystal structures establish C1P binding through a novel surface-localized, phosphate headgroup recognition centre connected to an interior hydrophobic pocket that adaptively expands to ensheath differing-length lipid chains using a cleft-like gating mechanism. The two-layer, alpha-helically-dominated 'sandwich' topology identifies CPTP as the prototype for a new glycolipid transfer protein fold subfamily. CPTP resides in the cell cytosol but associates with the trans-Golgi network, nucleus and plasma membrane. RNA interference-induced CPTP depletion elevates C1P steady-state levels and alters Golgi cisternae stack morphology. The resulting C1P decrease in plasma membranes and increase in the Golgi complex stimulates cPLA2alpha release of arachidonic acid, triggering pro-inflammatory eicosanoid generation.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3951269/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3951269/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Simanshu, Dhirendra K -- Kamlekar, Ravi Kanth -- Wijesinghe, Dayanjan S -- Zou, Xianqiong -- Zhai, Xiuhong -- Mishra, Shrawan K -- Molotkovsky, Julian G -- Malinina, Lucy -- Hinchcliffe, Edward H -- Chalfant, Charles E -- Brown, Rhoderick E -- Patel, Dinshaw J -- CA121493/CA/NCI NIH HHS/ -- CA154314/CA/NCI NIH HHS/ -- GM072754/GM/NIGMS NIH HHS/ -- GM45928/GM/NIGMS NIH HHS/ -- I01 BX001792/BX/BLRD VA/ -- R01 CA121493/CA/NCI NIH HHS/ -- R01 CA154314/CA/NCI NIH HHS/ -- R01 GM045928/GM/NIGMS NIH HHS/ -- R01 GM072754/GM/NIGMS NIH HHS/ -- R01 HL072925/HL/NHLBI NIH HHS/ -- S10 OD010641/OD/NIH HHS/ -- T32 008695/PHS HHS/ -- England -- Nature. 2013 Aug 22;500(7463):463-7. doi: 10.1038/nature12332. Epub 2013 Jul 17.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Structural Biology Program, Memorial Sloan-Kettering Cancer Center, New York, New York 10065, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23863933" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Apoproteins/chemistry ; Arachidonic Acid/metabolism ; Biological Transport ; Carrier Proteins/chemistry/genetics/*metabolism ; Cell Membrane/metabolism ; Cell Nucleus/metabolism ; Ceramides/chemistry/*metabolism ; Crystallography, X-Ray ; Cytosol/metabolism ; Eicosanoids/*metabolism ; Humans ; Hydrophobic and Hydrophilic Interactions ; Mice ; Models, Molecular ; Phosphatidic Acids/chemistry/metabolism ; Protein Conformation ; Protein Folding ; Substrate Specificity ; trans-Golgi Network/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 89
    Publication Date: 2013-07-12
    Description: Avian influenza A viruses rarely infect humans; however, when human infection and subsequent human-to-human transmission occurs, worldwide outbreaks (pandemics) can result. The recent sporadic infections of humans in China with a previously unrecognized avian influenza A virus of the H7N9 subtype (A(H7N9)) have caused concern owing to the appreciable case fatality rate associated with these infections (more than 25%), potential instances of human-to-human transmission, and the lack of pre-existing immunity among humans to viruses of this subtype. Here we characterize two early human A(H7N9) isolates, A/Anhui/1/2013 (H7N9) and A/Shanghai/1/2013 (H7N9); hereafter referred to as Anhui/1 and Shanghai/1, respectively. In mice, Anhui/1 and Shanghai/1 were more pathogenic than a control avian H7N9 virus (A/duck/Gunma/466/2011 (H7N9); Dk/GM466) and a representative pandemic 2009 H1N1 virus (A/California/4/2009 (H1N1pdm09); CA04). Anhui/1, Shanghai/1 and Dk/GM466 replicated well in the nasal turbinates of ferrets. In nonhuman primates, Anhui/1 and Dk/GM466 replicated efficiently in the upper and lower respiratory tracts, whereas the replicative ability of conventional human influenza viruses is typically restricted to the upper respiratory tract of infected primates. By contrast, Anhui/1 did not replicate well in miniature pigs after intranasal inoculation. Critically, Anhui/1 transmitted through respiratory droplets in one of three pairs of ferrets. Glycan arrays showed that Anhui/1, Shanghai/1 and A/Hangzhou/1/2013 (H7N9) (a third human A(H7N9) virus tested in this assay) bind to human virus-type receptors, a property that may be critical for virus transmissibility in ferrets. Anhui/1 was found to be less sensitive in mice to neuraminidase inhibitors than a pandemic H1N1 2009 virus, although both viruses were equally susceptible to an experimental antiviral polymerase inhibitor. The robust replicative ability in mice, ferrets and nonhuman primates and the limited transmissibility in ferrets of Anhui/1 suggest that A(H7N9) viruses have pandemic potential.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3891892/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3891892/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Watanabe, Tokiko -- Kiso, Maki -- Fukuyama, Satoshi -- Nakajima, Noriko -- Imai, Masaki -- Yamada, Shinya -- Murakami, Shin -- Yamayoshi, Seiya -- Iwatsuki-Horimoto, Kiyoko -- Sakoda, Yoshihiro -- Takashita, Emi -- McBride, Ryan -- Noda, Takeshi -- Hatta, Masato -- Imai, Hirotaka -- Zhao, Dongming -- Kishida, Noriko -- Shirakura, Masayuki -- de Vries, Robert P -- Shichinohe, Shintaro -- Okamatsu, Masatoshi -- Tamura, Tomokazu -- Tomita, Yuriko -- Fujimoto, Naomi -- Goto, Kazue -- Katsura, Hiroaki -- Kawakami, Eiryo -- Ishikawa, Izumi -- Watanabe, Shinji -- Ito, Mutsumi -- Sakai-Tagawa, Yuko -- Sugita, Yukihiko -- Uraki, Ryuta -- Yamaji, Reina -- Eisfeld, Amie J -- Zhong, Gongxun -- Fan, Shufang -- Ping, Jihui -- Maher, Eileen A -- Hanson, Anthony -- Uchida, Yuko -- Saito, Takehiko -- Ozawa, Makoto -- Neumann, Gabriele -- Kida, Hiroshi -- Odagiri, Takato -- Paulson, James C -- Hasegawa, Hideki -- Tashiro, Masato -- Kawaoka, Yoshihiro -- AI058113/AI/NIAID NIH HHS/ -- AI099274/AI/NIAID NIH HHS/ -- HHSN266200700010C/AI/NIAID NIH HHS/ -- HHSN266200700010C/PHS HHS/ -- T32 AI078985/AI/NIAID NIH HHS/ -- England -- Nature. 2013 Sep 26;501(7468):551-5. doi: 10.1038/nature12392. Epub 2013 Jul 10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉ERATO Infection-Induced Host Responses Project, Japan Science and Technology Agency, Saitama 332-0012, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23842494" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antiviral Agents/pharmacology ; Cells, Cultured ; Chickens/virology ; DNA-Directed RNA Polymerases/antagonists & inhibitors ; Dogs ; Enzyme Inhibitors/pharmacology ; Female ; Ferrets/virology ; Humans ; Influenza A Virus, H1N1 Subtype/drug effects/enzymology ; *Influenza A virus/chemistry/drug effects/isolation & purification/pathogenicity ; Influenza, Human/drug therapy/*virology ; Macaca fascicularis/virology ; Madin Darby Canine Kidney Cells ; Male ; Mice ; Mice, Inbred BALB C ; Models, Molecular ; Monkey Diseases/pathology/virology ; Neuraminidase/antagonists & inhibitors ; Orthomyxoviridae Infections/pathology/transmission/*virology ; Quail/virology ; Swine/virology ; Swine, Miniature/virology ; *Virus Replication/drug effects
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 90
    Publication Date: 2013-07-12
    Description: The inner ear contains sensory epithelia that detect head movements, gravity and sound. It is unclear how to develop these sensory epithelia from pluripotent stem cells, a process that will be critical for modelling inner ear disorders or developing cell-based therapies for profound hearing loss and balance disorders. So far, attempts to derive inner ear mechanosensitive hair cells and sensory neurons have resulted in inefficient or incomplete phenotypic conversion of stem cells into inner-ear-like cells. A key insight lacking from these previous studies is the importance of the non-neural and preplacodal ectoderm, two critical precursors during inner ear development. Here we report the stepwise differentiation of inner ear sensory epithelia from mouse embryonic stem cells (ESCs) in three-dimensional culture. We show that by recapitulating in vivo development with precise temporal control of signalling pathways, ESC aggregates transform sequentially into non-neural, preplacodal and otic-placode-like epithelia. Notably, in a self-organized process that mimics normal development, vesicles containing prosensory cells emerge from the presumptive otic placodes and give rise to hair cells bearing stereocilia bundles and a kinocilium. Moreover, these stem-cell-derived hair cells exhibit functional properties of native mechanosensitive hair cells and form specialized synapses with sensory neurons that have also arisen from ESCs in the culture. Finally, we demonstrate how these vesicles are structurally and biochemically comparable to developing vestibular end organs. Our data thus establish a new in vitro model of inner ear differentiation that can be used to gain deeper insight into inner ear development and disorder.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3739998/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3739998/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Koehler, Karl R -- Mikosz, Andrew M -- Molosh, Andrei I -- Patel, Dharmeshkumar -- Hashino, Eri -- R01 GM086544/GM/NIGMS NIH HHS/ -- R01GM086544/GM/NIGMS NIH HHS/ -- R01MH52619/MH/NIMH NIH HHS/ -- R21 DC012617/DC/NIDCD NIH HHS/ -- R21DC012617/DC/NIDCD NIH HHS/ -- RC1 DC010706/DC/NIDCD NIH HHS/ -- RC1DC010706/DC/NIDCD NIH HHS/ -- TL1RR025759/RR/NCRR NIH HHS/ -- England -- Nature. 2013 Aug 8;500(7461):217-21. doi: 10.1038/nature12298. Epub 2013 Jul 10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Medical Neuroscience Graduate Program, Indiana University School of Medicine, Indianapolis, Indiana 46202, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23842490" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Culture Techniques ; *Cell Differentiation ; Ear, Inner/*cytology/embryology ; Electrical Synapses/physiology ; Gene Expression Regulation, Developmental ; Hair Cells, Auditory, Inner/*cytology ; Humans ; Mice ; Myosins/genetics/metabolism ; Neurogenesis ; Pluripotent Stem Cells/*cytology ; Recombinant Proteins/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 91
    Publication Date: 2013-03-19
    Description: Embryonic stem (ES) cells are pluripotent and characterized by open chromatin and high transcription levels, achieved through auto-regulatory and feed-forward transcription factor loops. ES-cell identity is maintained by a core of factors including Oct4 (also known as Pou5f1), Sox2, Klf4, c-Myc (OSKM) and Nanog, and forced expression of the OSKM factors can reprogram somatic cells into induced pluripotent stem cells (iPSCs) resembling ES cells. These gene-specific factors for RNA-polymerase-II-mediated transcription recruit transcriptional cofactors and chromatin regulators that control access to and activity of the basal transcription machinery on gene promoters. How the basal transcription machinery is involved in setting and maintaining the pluripotent state is unclear. Here we show that knockdown of the transcription factor IID (TFIID) complex affects the pluripotent circuitry in mouse ES cells and inhibits reprogramming of fibroblasts. TFIID subunits and the OSKM factors form a feed-forward loop to induce and maintain a stable transcription state. Notably, transient expression of TFIID subunits greatly enhanced reprogramming. These results show that TFIID is critical for transcription-factor-mediated reprogramming. We anticipate that, by creating plasticity in gene expression programs, transcription complexes such as TFIID assist reprogramming into different cellular states.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pijnappel, W W M Pim -- Esch, Daniel -- Baltissen, Marijke P A -- Wu, Guangming -- Mischerikow, Nikolai -- Bergsma, Atze J -- van der Wal, Erik -- Han, Dong Wook -- Bruch, Hermann vom -- Moritz, Soren -- Lijnzaad, Phillip -- Altelaar, A F Maarten -- Sameith, Katrin -- Zaehres, Holm -- Heck, Albert J R -- Holstege, Frank C P -- Scholer, Hans R -- Timmers, H T Marc -- England -- Nature. 2013 Mar 28;495(7442):516-9. doi: 10.1038/nature11970. Epub 2013 Mar 17.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Molecular Cancer Research, University Medical Center Utrecht, 3584 CG Utrecht, The Netherlands.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23503660" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cellular Reprogramming/genetics ; Chromatin/genetics/metabolism ; Embryonic Stem Cells/cytology/metabolism ; Female ; Fibroblasts/cytology/metabolism ; Humans ; Induced Pluripotent Stem Cells/cytology/metabolism ; Male ; Mice ; Pluripotent Stem Cells/cytology/*metabolism ; Promoter Regions, Genetic/genetics ; RNA Polymerase II/metabolism ; TATA-Binding Protein Associated Factors/deficiency/genetics/metabolism ; TATA-Box Binding Protein/metabolism ; Transcription Factor TFIID/deficiency/genetics/*metabolism ; Transcription Factors/genetics/metabolism ; *Transcription, Genetic
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 92
    Publication Date: 2013-11-10
    Description: A heterogeneous population of inhibitory neurons controls the flow of information through a neural circuit. Inhibitory synapses that form on pyramidal neuron dendrites modulate the summation of excitatory synaptic potentials and prevent the generation of dendritic calcium spikes. Precisely timed somatic inhibition limits both the number of action potentials and the time window during which firing can occur. The activity-dependent transcription factor NPAS4 regulates inhibitory synapse number and function in cell culture, but how this transcription factor affects the inhibitory inputs that form on distinct domains of a neuron in vivo was unclear. Here we show that in the mouse hippocampus behaviourally driven expression of NPAS4 coordinates the redistribution of inhibitory synapses made onto a CA1 pyramidal neuron, simultaneously increasing inhibitory synapse number on the cell body while decreasing the number of inhibitory synapses on the apical dendrites. This rearrangement of inhibition is mediated in part by the NPAS4 target gene brain derived neurotrophic factor (Bdnf), which specifically regulates somatic, and not dendritic, inhibition. These findings indicate that sensory stimuli, by inducing NPAS4 and its target genes, differentially control spatial features of neuronal inhibition in a way that restricts the output of the neuron while creating a dendritic environment that is permissive for plasticity.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4169177/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4169177/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bloodgood, Brenda L -- Sharma, Nikhil -- Browne, Heidi Adlman -- Trepman, Alissa Z -- Greenberg, Michael E -- NS028829/NS/NINDS NIH HHS/ -- P01 NS047572/NS/NINDS NIH HHS/ -- P30 HD018655/HD/NICHD NIH HHS/ -- P30 NS047101/NS/NINDS NIH HHS/ -- England -- Nature. 2013 Nov 7;503(7474):121-5. doi: 10.1038/nature12743.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] Department of Neurobiology, Harvard Medical School, Boston, Massachusetts 02115, USA [2] Division of Biological Sciences, University of California San Diego, La Jolla, California 92093, USA [3].〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24201284" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Basic Helix-Loop-Helix Transcription Factors/deficiency/genetics/*metabolism ; Brain-Derived Neurotrophic Factor/genetics/metabolism ; Dendrites/physiology ; Female ; Hippocampus/*cytology ; Male ; Mice ; Mice, Knockout ; *Neural Inhibition ; Neuronal Plasticity ; Neurons/cytology/*metabolism ; Pyramidal Cells/cytology/metabolism ; Synapses/*metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 93
    Publication Date: 2013-12-18
    Description: CCAAT/enhancer binding protein-alpha (C/EBPalpha) induces transdifferentiation of B cells into macrophages at high efficiencies and enhances reprogramming into induced pluripotent stem (iPS) cells when co-expressed with the transcription factors Oct4 (Pou5f1), Sox2, Klf4 and Myc (hereafter called OSKM). However, how C/EBPalpha accomplishes these effects is unclear. Here we find that in mouse primary B cells transient C/EBPalpha expression followed by OSKM activation induces a 100-fold increase in iPS cell reprogramming efficiency, involving 95% of the population. During this conversion, pluripotency and epithelial-mesenchymal transition genes become markedly upregulated, and 60% of the cells express Oct4 within 2 days. C/EBPalpha acts as a 'path-breaker' as it transiently makes the chromatin of pluripotency genes more accessible to DNase I. C/EBPalpha also induces the expression of the dioxygenase Tet2 and promotes its translocation to the nucleus where it binds to regulatory regions of pluripotency genes that become demethylated after OSKM induction. In line with these findings, overexpression of Tet2 enhances OSKM-induced B-cell reprogramming. Because the enzyme is also required for efficient C/EBPalpha-induced immune cell conversion, our data indicate that Tet2 provides a mechanistic link between iPS cell reprogramming and B-cell transdifferentiation. The rapid iPS reprogramming approach described here should help to fully elucidate the process and has potential clinical applications.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Di Stefano, Bruno -- Sardina, Jose Luis -- van Oevelen, Chris -- Collombet, Samuel -- Kallin, Eric M -- Vicent, Guillermo P -- Lu, Jun -- Thieffry, Denis -- Beato, Miguel -- Graf, Thomas -- England -- Nature. 2014 Feb 13;506(7487):235-9. doi: 10.1038/nature12885. Epub 2013 Dec 15.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] Gene Regulation, Stem Cells and Cancer Programme, Centre for Genomic Regulation (CRG), Dr Aiguader 88, 08003 Barcelona, Spain [2] Universitat Pompeu Fabra (UPF), Dr Aiguader 88, 08003 Barcelona, Spain. ; 1] Gene Regulation, Stem Cells and Cancer Programme, Centre for Genomic Regulation (CRG), Dr Aiguader 88, 08003 Barcelona, Spain [2] Universitat Pompeu Fabra (UPF), Dr Aiguader 88, 08003 Barcelona, Spain [3]. ; 1] Ecole Normale Superieure, Institut de Biologie de l'ENS, 45 Rue d'Ulm, Paris F-75005, France [2] Inserm, U1024, Paris F-75005, France [3] CNRS, UMR 8197, Paris F-75005, France. ; 1] Gene Regulation, Stem Cells and Cancer Programme, Centre for Genomic Regulation (CRG), Dr Aiguader 88, 08003 Barcelona, Spain [2] Universitat Pompeu Fabra (UPF), Dr Aiguader 88, 08003 Barcelona, Spain [3] Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York 10065, USA. ; Yale Cancer Center, Yale University School of Medicine, 333 Cedar Street, New Haven, Connecticut 06510, USA. ; 1] Gene Regulation, Stem Cells and Cancer Programme, Centre for Genomic Regulation (CRG), Dr Aiguader 88, 08003 Barcelona, Spain [2] Universitat Pompeu Fabra (UPF), Dr Aiguader 88, 08003 Barcelona, Spain [3] Institucio Catalana de Recerca i Estudis Avancats (ICREA), Pg Lluis Companys 23, 08010 Barcelona, Spain.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24336202" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; B-Lymphocytes/*cytology/*metabolism ; CCAAT-Enhancer-Binding Protein-alpha/genetics/*metabolism ; *Cell Transdifferentiation ; Cells, Cultured ; *Cellular Reprogramming/genetics ; Chromatin/genetics/metabolism ; Cytosine/metabolism ; DNA Methylation ; DNA-Binding Proteins/genetics/metabolism ; Deoxyribonuclease I/metabolism ; Epithelial-Mesenchymal Transition/genetics ; Induced Pluripotent Stem Cells/*cytology/*metabolism ; Kruppel-Like Transcription Factors/genetics/metabolism ; Mice ; Octamer Transcription Factor-3/genetics/metabolism ; Proto-Oncogene Proteins/genetics/metabolism ; Proto-Oncogene Proteins c-myc/genetics/metabolism ; SOXB1 Transcription Factors/genetics/metabolism ; Up-Regulation/genetics
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 94
    facet.materialart.
    Unknown
    Nature Publishing Group (NPG)
    Publication Date: 2013-04-20
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Boehm, Thomas -- England -- Nature. 2013 Apr 18;496(7445):304-5. doi: 10.1038/496304a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23598335" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Genetic Variation ; Genome/*genetics ; *Heredity ; Ligands ; Major Histocompatibility Complex/genetics/immunology ; Mice ; Models, Biological ; Peptides/chemistry/genetics/urine ; Proteins/analysis/chemistry/genetics ; Proteolysis ; Sensory Receptor Cells/metabolism ; Smell/*physiology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 95
    Publication Date: 2013-10-29
    Description: Integrins have a critical role in thrombosis and haemostasis. Antagonists of the platelet integrin alphaIIbbeta3 are potent anti-thrombotic drugs, but also have the life-threatening adverse effect of causing bleeding. It is therefore desirable to develop new antagonists that do not cause bleeding. Integrins transmit signals bidirectionally. Inside-out signalling activates integrins through a talin-dependent mechanism. Integrin ligation mediates thrombus formation and outside-in signalling, which requires Galpha13 and greatly expands thrombi. Here we show that Galpha13 and talin bind to mutually exclusive but distinct sites within the integrin beta3 cytoplasmic domain in opposing waves. The first talin-binding wave mediates inside-out signalling and also ligand-induced integrin activation, but is not required for outside-in signalling. Integrin ligation induces transient talin dissociation and Galpha13 binding to an EXE motif (in which X denotes any residue), which selectively mediates outside-in signalling and platelet spreading. The second talin-binding wave is associated with clot retraction. An EXE-motif-based inhibitor of Galpha13-integrin interaction selectively abolishes outside-in signalling without affecting integrin ligation, and suppresses occlusive arterial thrombosis without affecting bleeding time. Thus, we have discovered a new mechanism for the directional switch of integrin signalling and, on the basis of this mechanism, designed a potent new anti-thrombotic drug that does not cause bleeding.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3823815/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3823815/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shen, Bo -- Zhao, Xiaojuan -- O'Brien, Kelly A -- Stojanovic-Terpo, Aleksandra -- Delaney, M Keegan -- Kim, Kyungho -- Cho, Jaehyung -- Lam, Stephen C-T -- Du, Xiaoping -- HL062350/HL/NHLBI NIH HHS/ -- HL080264/HL/NHLBI NIH HHS/ -- HL109439/HL/NHLBI NIH HHS/ -- R01 HL080264/HL/NHLBI NIH HHS/ -- R01 HL109439/HL/NHLBI NIH HHS/ -- T32 HL007829/HL/NHLBI NIH HHS/ -- England -- Nature. 2013 Nov 7;503(7474):131-5. doi: 10.1038/nature12613. Epub 2013 Oct 27.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pharmacology, University of Illinois at Chicago, 835 South Wolcott Avenue, Chicago, Illinois 60612, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24162846" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Motifs ; Amino Acid Sequence ; Animals ; Antithrombins/adverse effects/*pharmacology/therapeutic use ; Binding Sites ; Bleeding Time ; *Cell Polarity ; Cytoplasm/metabolism ; GTP-Binding Protein alpha Subunits, G12-G13/metabolism ; Hemorrhage/chemically induced ; Humans ; Integrin beta3/chemistry/genetics/metabolism ; Integrins/chemistry/deficiency/genetics/*metabolism ; Male ; Mice ; Mice, Inbred C57BL ; Molecular Sequence Data ; Platelet Glycoprotein GPIIb-IIIa Complex/metabolism ; Protein Binding ; Protein Structure, Tertiary ; Signal Transduction/*drug effects ; Talin/metabolism ; Thrombosis/*drug therapy/metabolism/pathology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 96
    Publication Date: 2013-02-22
    Description: Ageing is the predominant risk factor for cardiovascular diseases and contributes to a significantly worse outcome in patients with acute myocardial infarction. MicroRNAs (miRNAs) have emerged as crucial regulators of cardiovascular function and some miRNAs have key roles in ageing. We propose that altered expression of miRNAs in the heart during ageing contributes to the age-dependent decline in cardiac function. Here we show that miR-34a is induced in the ageing heart and that in vivo silencing or genetic deletion of miR-34a reduces age-associated cardiomyocyte cell death. Moreover, miR-34a inhibition reduces cell death and fibrosis following acute myocardial infarction and improves recovery of myocardial function. Mechanistically, we identified PNUTS (also known as PPP1R10) as a novel direct miR-34a target, which reduces telomere shortening, DNA damage responses and cardiomyocyte apoptosis, and improves functional recovery after acute myocardial infarction. Together, these results identify age-induced expression of miR-34a and inhibition of its target PNUTS as a key mechanism that regulates cardiac contractile function during ageing and after acute myocardial infarction, by inducing DNA damage responses and telomere attrition.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Boon, Reinier A -- Iekushi, Kazuma -- Lechner, Stefanie -- Seeger, Timon -- Fischer, Ariane -- Heydt, Susanne -- Kaluza, David -- Treguer, Karine -- Carmona, Guillaume -- Bonauer, Angelika -- Horrevoets, Anton J G -- Didier, Nathalie -- Girmatsion, Zenawit -- Biliczki, Peter -- Ehrlich, Joachim R -- Katus, Hugo A -- Muller, Oliver J -- Potente, Michael -- Zeiher, Andreas M -- Hermeking, Heiko -- Dimmeler, Stefanie -- England -- Nature. 2013 Mar 7;495(7439):107-10. doi: 10.1038/nature11919. Epub 2013 Feb 20.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute for Cardiovascular Regeneration, Centre of Molecular Medicine, Goethe University Frankfurt, 60590 Frankfurt, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23426265" target="_blank"〉PubMed〈/a〉
    Keywords: Aging/genetics/pathology/*physiology ; Animals ; Apoptosis ; DNA Damage ; Fibrosis/genetics/pathology ; Gene Deletion ; *Gene Expression Regulation ; Gene Knockout Techniques ; Genetic Therapy ; Heart/*physiology ; Mice ; Mice, Inbred C57BL ; MicroRNAs/*genetics/metabolism ; Myocardial Infarction/genetics/pathology/therapy ; Myocardium/cytology/*metabolism/pathology ; Myocytes, Cardiac/cytology/metabolism/pathology ; Substrate Specificity ; Telomere/genetics/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 97
    Publication Date: 2013-03-22
    Description: Behavioural states in mammals, such as the anxious state, are characterized by several features that are coordinately regulated by diverse nervous system outputs, ranging from behavioural choice patterns to changes in physiology (in anxiety, exemplified respectively by risk-avoidance and respiratory rate alterations). Here we investigate if and how defined neural projections arising from a single coordinating brain region in mice could mediate diverse features of anxiety. Integrating behavioural assays, in vivo and in vitro electrophysiology, respiratory physiology and optogenetics, we identify a surprising new role for the bed nucleus of the stria terminalis (BNST) in the coordinated modulation of diverse anxiety features. First, two BNST subregions were unexpectedly found to exert opposite effects on the anxious state: oval BNST activity promoted several independent anxious state features, whereas anterodorsal BNST-associated activity exerted anxiolytic influence for the same features. Notably, we found that three distinct anterodorsal BNST efferent projections-to the lateral hypothalamus, parabrachial nucleus and ventral tegmental area-each implemented an independent feature of anxiolysis: reduced risk-avoidance, reduced respiratory rate, and increased positive valence, respectively. Furthermore, selective inhibition of corresponding circuit elements in freely moving mice showed opposing behavioural effects compared with excitation, and in vivo recordings during free behaviour showed native spiking patterns in anterodorsal BNST neurons that differentiated safe and anxiogenic environments. These results demonstrate that distinct BNST subregions exert opposite effects in modulating anxiety, establish separable anxiolytic roles for different anterodorsal BNST projections, and illustrate circuit mechanisms underlying selection of features for the assembly of the anxious state.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kim, Sung-Yon -- Adhikari, Avishek -- Lee, Soo Yeun -- Marshel, James H -- Kim, Christina K -- Mallory, Caitlin S -- Lo, Maisie -- Pak, Sally -- Mattis, Joanna -- Lim, Byung Kook -- Malenka, Robert C -- Warden, Melissa R -- Neve, Rachael -- Tye, Kay M -- Deisseroth, Karl -- F32 MH088010/MH/NIMH NIH HHS/ -- T32 MH020002/MH/NIMH NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2013 Apr 11;496(7444):219-23. doi: 10.1038/nature12018. Epub 2013 Mar 20.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Bioengineering, Stanford University, Stanford, California 94305, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23515158" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Animals ; Anxiety/pathology/*physiopathology ; Electrophysiology ; Mice ; Neural Pathways/*physiology ; Optogenetics ; Septal Nuclei/anatomy & histology/cytology/*physiopathology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 98
    Publication Date: 2013-12-07
    Description: Non-small-cell lung cancer (NSCLC) is the most prevalent histological cancer subtype worldwide. As the majority of patients present with invasive, metastatic disease, it is vital to understand the basis for lung cancer progression. Hmga2 is highly expressed in metastatic lung adenocarcinoma, in which it contributes to cancer progression and metastasis. Here we show that Hmga2 promotes lung cancer progression in mouse and human cells by operating as a competing endogenous RNA (ceRNA) for the let-7 microRNA (miRNA) family. Hmga2 can promote the transformation of lung cancer cells independent of protein-coding function but dependent upon the presence of let-7 sites; this occurs without changes in the levels of let-7 isoforms, suggesting that Hmga2 affects let-7 activity by altering miRNA targeting. These effects are also observed in vivo, where Hmga2 ceRNA activity drives lung cancer growth, invasion and dissemination. Integrated analysis of miRNA target prediction algorithms and metastatic lung cancer gene expression data reveals the TGF-beta co-receptor Tgfbr3 (ref. 12) as a putative target of Hmga2 ceRNA function. Tgfbr3 expression is regulated by the Hmga2 ceRNA through differential recruitment to Argonaute 2 (Ago2), and TGF-beta signalling driven by Tgfbr3 is important for Hmga2 to promote lung cancer progression. Finally, analysis of NSCLC-patient gene-expression data reveals that HMGA2 and TGFBR3 are coordinately regulated in NSCLC-patient material, a vital corollary to ceRNA function. Taken together, these results suggest that Hmga2 promotes lung carcinogenesis both as a protein-coding gene and as a non-coding RNA; such dual-function regulation of gene-expression networks reflects a novel means by which oncogenes promote disease progression.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3886898/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3886898/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kumar, Madhu S -- Armenteros-Monterroso, Elena -- East, Philip -- Chakravorty, Probir -- Matthews, Nik -- Winslow, Monte M -- Downward, Julian -- 13-0142/Worldwide Cancer Research/United Kingdom -- 323145/European Research Council/International -- A3570/Cancer Research UK/United Kingdom -- A7419/Cancer Research UK/United Kingdom -- Cancer Research UK/United Kingdom -- England -- Nature. 2014 Jan 9;505(7482):212-7. doi: 10.1038/nature12785. Epub 2013 Dec 4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Signal Transduction Laboratory, Cancer Research UK London Research Institute, 44 Lincoln's Inn Fields, London WC2A 3LY, UK. ; Bioinformatics and Biostatistics Group, Cancer Research UK London Research Institute, 44 Lincoln's Inn Fields, London WC2A 3LY, UK. ; Advanced Sequencing Facility, Cancer Research UK London Research Institute, 44 Lincoln's Inn Fields, London WC2A 3LY, UK. ; Department of Genetics, Department of Pathology, the Stanford Cancer Institute, Stanford University School of Medicine, Stanford, California 94305, USA. ; 1] Signal Transduction Laboratory, Cancer Research UK London Research Institute, 44 Lincoln's Inn Fields, London WC2A 3LY, UK [2] Lung Cancer Group, Division of Cancer Biology, The Institute of Cancer Research, 237 Fulham Road, London SW3 6JB, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24305048" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Argonaute Proteins/metabolism ; Binding, Competitive/genetics ; Carcinoma, Non-Small-Cell Lung/genetics/pathology ; Cell Line, Tumor ; Cell Proliferation ; Disease Models, Animal ; *Disease Progression ; Gene Expression Regulation, Neoplastic/genetics ; HMGA2 Protein/*genetics ; Humans ; Lung Neoplasms/*genetics/*pathology ; Mice ; MicroRNAs/genetics/metabolism ; Neoplasm Invasiveness/genetics ; Neoplasm Metastasis/genetics ; Proteoglycans/biosynthesis/deficiency/genetics ; RNA Isoforms/genetics/metabolism ; Receptors, Transforming Growth Factor beta/biosynthesis/deficiency/genetics ; Transcription, Genetic/genetics ; Transforming Growth Factor beta/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 99
    Publication Date: 2013-12-10
    Description: Respiratory surfaces are exposed to billions of particulates and pathogens daily. A protective mucus barrier traps and eliminates them through mucociliary clearance (MCC). However, excessive mucus contributes to transient respiratory infections and to the pathogenesis of numerous respiratory diseases. MUC5AC and MUC5B are evolutionarily conserved genes that encode structurally related mucin glycoproteins, the principal macromolecules in airway mucus. Genetic variants are linked to diverse lung diseases, but specific roles for MUC5AC and MUC5B in MCC, and the lasting effects of their inhibition, are unknown. Here we show that mouse Muc5b (but not Muc5ac) is required for MCC, for controlling infections in the airways and middle ear, and for maintaining immune homeostasis in mouse lungs, whereas Muc5ac is dispensable. Muc5b deficiency caused materials to accumulate in upper and lower airways. This defect led to chronic infection by multiple bacterial species, including Staphylococcus aureus, and to inflammation that failed to resolve normally. Apoptotic macrophages accumulated, phagocytosis was impaired, and interleukin-23 (IL-23) production was reduced in Muc5b(-/-) mice. By contrast, in mice that transgenically overexpress Muc5b, macrophage functions improved. Existing dogma defines mucous phenotypes in asthma and chronic obstructive pulmonary disease (COPD) as driven by increased MUC5AC, with MUC5B levels either unaffected or increased in expectorated sputum. However, in many patients, MUC5B production at airway surfaces decreases by as much as 90%. By distinguishing a specific role for Muc5b in MCC, and by determining its impact on bacterial infections and inflammation in mice, our results provide a refined framework for designing targeted therapies to control mucin secretion and restore MCC.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4001806/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4001806/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Roy, Michelle G -- Livraghi-Butrico, Alessandra -- Fletcher, Ashley A -- McElwee, Melissa M -- Evans, Scott E -- Boerner, Ryan M -- Alexander, Samantha N -- Bellinghausen, Lindsey K -- Song, Alfred S -- Petrova, Youlia M -- Tuvim, Michael J -- Adachi, Roberto -- Romo, Irlanda -- Bordt, Andrea S -- Bowden, M Gabriela -- Sisson, Joseph H -- Woodruff, Prescott G -- Thornton, David J -- Rousseau, Karine -- De la Garza, Maria M -- Moghaddam, Seyed J -- Karmouty-Quintana, Harry -- Blackburn, Michael R -- Drouin, Scott M -- Davis, C William -- Terrell, Kristy A -- Grubb, Barbara R -- O'Neal, Wanda K -- Flores, Sonia C -- Cota-Gomez, Adela -- Lozupone, Catherine A -- Donnelly, Jody M -- Watson, Alan M -- Hennessy, Corinne E -- Keith, Rebecca C -- Yang, Ivana V -- Barthel, Lea -- Henson, Peter M -- Janssen, William J -- Schwartz, David A -- Boucher, Richard C -- Dickey, Burton F -- Evans, Christopher M -- CA016086/CA/NCI NIH HHS/ -- CA016672/CA/NCI NIH HHS/ -- CA046934/CA/NCI NIH HHS/ -- G1000450/Medical Research Council/United Kingdom -- K01 DK090285/DK/NIDDK NIH HHS/ -- P01 HL108808/HL/NHLBI NIH HHS/ -- P01 HL110873/HL/NHLBI NIH HHS/ -- P30 CA016086/CA/NCI NIH HHS/ -- P30 CA016672/CA/NCI NIH HHS/ -- P30 CA046934/CA/NCI NIH HHS/ -- P30 DK065988/DK/NIDDK NIH HHS/ -- P30DK065988/DK/NIDDK NIH HHS/ -- P50 HL107168/HL/NHLBI NIH HHS/ -- R01 AA008769/AA/NIAAA NIH HHS/ -- R01 HL080396/HL/NHLBI NIH HHS/ -- R01 HL097000/HL/NHLBI NIH HHS/ -- R01 HL109517/HL/NHLBI NIH HHS/ -- R01 HL114381/HL/NHLBI NIH HHS/ -- England -- Nature. 2014 Jan 16;505(7483):412-6. doi: 10.1038/nature12807. Epub 2013 Dec 8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] University of Texas, MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, Texas 77030, USA [2]. ; 1] University of North Carolina-Chapel Hill, 7011 Thurston-Bowles Building, Chapel Hill, North Carolina 27599, USA [2]. ; 1] University of Colorado School of Medicine, 12700 East 19th Avenue, Aurora, Colorado 80045, USA [2]. ; University of Texas, MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, Texas 77030, USA. ; University of Texas Health Science Center-Houston Medical School, 6431 Fannin Street, Houston, Texas 77030, USA. ; 1] University of Texas, MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, Texas 77030, USA [2] Instituto Tecnologico y de Estudios Superiores de Monterrey, Avenida Eugenio Garza Sada 2501 Sur Colonia Tecnologico, Monterrey, Nuevo Leon 64849, Mexico. ; Texas A&M Health Science Center, 2121 W. Holcombe Boulevard, Houston, Texas 77030, USA. ; 1] Texas A&M Health Science Center, 2121 W. Holcombe Boulevard, Houston, Texas 77030, USA [2] University of Houston-Downtown, 1 Main Street, Houston, Texas 77002, USA. ; University of Nebraska Medical Center, 985910 Nebraska Medical Center, Omaha, Nebraska 68198, USA. ; University of California San Francisco, 505 Parnassus Avenue, San Francisco, California 27599, USA. ; University of Manchester, Michael Smith Building, Oxford Road, Manchester, M13 9PT, UK. ; University of North Carolina-Chapel Hill, 7011 Thurston-Bowles Building, Chapel Hill, North Carolina 27599, USA. ; University of Colorado School of Medicine, 12700 East 19th Avenue, Aurora, Colorado 80045, USA. ; 1] University of Colorado School of Medicine, 12700 East 19th Avenue, Aurora, Colorado 80045, USA [2] National Jewish Health, Denver, Colorado 80206, USA. ; 1] University of Texas, MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, Texas 77030, USA [2] University of Colorado School of Medicine, 12700 East 19th Avenue, Aurora, Colorado 80045, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24317696" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Asthma/immunology/metabolism ; Bacterial Infections/immunology/microbiology ; Cilia/physiology ; Ear, Middle/immunology/microbiology ; Female ; Inflammation/pathology ; Lung/*immunology/metabolism/microbiology ; Macrophages/immunology/pathology ; Male ; Mice ; Mice, Inbred C57BL ; Mice, Transgenic ; Models, Biological ; Mucin 5AC/deficiency/metabolism ; Mucin-5B/deficiency/genetics/*metabolism/secretion ; Phagocytosis ; Pulmonary Disease, Chronic Obstructive/immunology/microbiology ; Respiratory Mucosa/*immunology/*metabolism ; Staphylococcus aureus/immunology ; Survival Analysis
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 100
    Publication Date: 2013-11-22
    Description: Synchronization of spiking activity in neuronal networks is a fundamental process that enables the precise transmission of information to drive behavioural responses. In cortical areas, synchronization of principal-neuron spiking activity is an effective mechanism for information coding that is regulated by GABA (gamma-aminobutyric acid)-ergic interneurons through the generation of neuronal oscillations. Although neuronal synchrony has been demonstrated to be crucial for sensory, motor and cognitive processing, it has not been investigated at the level of defined circuits involved in the control of emotional behaviour. Converging evidence indicates that fear behaviour is regulated by the dorsomedial prefrontal cortex (dmPFC). This control over fear behaviour relies on the activation of specific prefrontal projections to the basolateral complex of the amygdala (BLA), a structure that encodes associative fear memories. However, it remains to be established how the precise temporal control of fear behaviour is achieved at the level of prefrontal circuits. Here we use single-unit recordings and optogenetic manipulations in behaving mice to show that fear expression is causally related to the phasic inhibition of prefrontal parvalbumin interneurons (PVINs). Inhibition of PVIN activity disinhibits prefrontal projection neurons and synchronizes their firing by resetting local theta oscillations, leading to fear expression. Our results identify two complementary neuronal mechanisms mediated by PVINs that precisely coordinate and enhance the neuronal activity of prefrontal projection neurons to drive fear expression.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Courtin, Julien -- Chaudun, Fabrice -- Rozeske, Robert R -- Karalis, Nikolaos -- Gonzalez-Campo, Cecilia -- Wurtz, Helene -- Abdi, Azzedine -- Baufreton, Jerome -- Bienvenu, Thomas C M -- Herry, Cyril -- England -- Nature. 2014 Jan 2;505(7481):92-6. doi: 10.1038/nature12755. Epub 2013 Nov 20.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] INSERM, Neurocentre Magendie, U862, 146 Rue Leo-Saignat, Bordeaux 33077, France [2] University of Bordeaux, Neurocentre Magendie, U862, 146 Rue Leo-Saignat, Bordeaux 33077, France. ; 1] University of Bordeaux, Institut des Maladies Neurodegeneratives, UMR 5293, Bordeaux F-33000, France [2] CNRS, Institut des Maladies Neurodegeneratives, UMR 5293, Bordeaux F-33000, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24256726" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Amygdala/physiology ; Animals ; Conditioning (Psychology) ; Extinction, Psychological ; Fear/*physiology/psychology ; Interneurons/*metabolism ; Male ; Memory/physiology ; Mice ; Mice, Inbred C57BL ; Models, Neurological ; Neural Inhibition/*physiology ; Neural Pathways ; Optogenetics ; Parvalbumins/*metabolism ; Prefrontal Cortex/*cytology/*physiology ; Theta Rhythm
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...