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  • Articles  (80)
  • Signal Transduction  (80)
  • 2015-2019  (1)
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  • 1
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    Nebulin and N-WASP cooperate to cause IGF-1-induced sarcomeric actin filament formation (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-12-15
    Description: Insulin-like growth factor 1 (IGF-1) induces skeletal muscle maturation and enlargement (hypertrophy). These responses require protein synthesis and myofibril formation (myofibrillogenesis). However, the signaling mechanisms of myofibrillogenesis remain obscure. We found that IGF-1-induced phosphatidylinositol 3-kinase-Akt signaling formed a complex of nebulin and N-WASP at the Z bands of myofibrils by interfering with glycogen synthase kinase-3beta in mice. Although N-WASP is known to be an activator of the Arp2/3 complex to form branched actin filaments, the nebulin-N-WASP complex caused actin nucleation for unbranched actin filament formation from the Z bands without the Arp2/3 complex. Furthermore, N-WASP was required for IGF-1-induced muscle hypertrophy. These findings present the mechanisms of IGF-1-induced actin filament formation in myofibrillogenesis required for muscle maturation and hypertrophy and a mechanism of actin nucleation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Takano, Kazunori -- Watanabe-Takano, Haruko -- Suetsugu, Shiro -- Kurita, Souichi -- Tsujita, Kazuya -- Kimura, Sumiko -- Karatsu, Takashi -- Takenawa, Tadaomi -- Endo, Takeshi -- New York, N.Y. -- Science. 2010 Dec 10;330(6010):1536-40. doi: 10.1126/science.1197767.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, Graduate School of Science, Chiba University, 1-33 Yayoicho, Inageku, Chiba 263-8522, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21148390" target="_blank"〉PubMed〈/a〉
    Keywords: Actin Cytoskeleton/*metabolism ; Actins/*metabolism ; Animals ; COS Cells ; Cercopithecus aethiops ; Hypertrophy ; Insulin-Like Growth Factor I/*metabolism ; Mice ; Mice, Inbred ICR ; *Muscle Development ; Muscle Proteins/chemistry/*metabolism ; Muscle, Skeletal/metabolism/pathology ; Myofibrils/metabolism ; Phosphatidylinositol 3-Kinase/metabolism ; Protein Binding ; Protein Interaction Domains and Motifs ; Proto-Oncogene Proteins c-akt/metabolism ; RNA Interference ; Sarcomeres/*metabolism ; Signal Transduction ; Wiskott-Aldrich Syndrome Protein, Neuronal/chemistry/*metabolism ; src Homology Domains
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 2
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    Beta2-adrenergic receptor redistribution in heart failure changes cAMP compartmentation (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-02-27
    Description: The beta1- and beta2-adrenergic receptors (betaARs) on the surface of cardiomyocytes mediate distinct effects on cardiac function and the development of heart failure by regulating production of the second messenger cyclic adenosine monophosphate (cAMP). The spatial localization in cardiomyocytes of these betaARs, which are coupled to heterotrimeric guanine nucleotide-binding proteins (G proteins), and the functional implications of their localization have been unclear. We combined nanoscale live-cell scanning ion conductance and fluorescence resonance energy transfer microscopy techniques and found that, in cardiomyocytes from healthy adult rats and mice, spatially confined beta2AR-induced cAMP signals are localized exclusively to the deep transverse tubules, whereas functional beta1ARs are distributed across the entire cell surface. In cardiomyocytes derived from a rat model of chronic heart failure, beta2ARs were redistributed from the transverse tubules to the cell crest, which led to diffuse receptor-mediated cAMP signaling. Thus, the redistribution of beta(2)ARs in heart failure changes compartmentation of cAMP and might contribute to the failing myocardial phenotype.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nikolaev, Viacheslav O -- Moshkov, Alexey -- Lyon, Alexander R -- Miragoli, Michele -- Novak, Pavel -- Paur, Helen -- Lohse, Martin J -- Korchev, Yuri E -- Harding, Sian E -- Gorelik, Julia -- 084064/Wellcome Trust/United Kingdom -- BB/D020875/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- G0500373/Medical Research Council/United Kingdom -- Biotechnology and Biological Sciences Research Council/United Kingdom -- Medical Research Council/United Kingdom -- New York, N.Y. -- Science. 2010 Mar 26;327(5973):1653-7. doi: 10.1126/science.1185988. Epub 2010 Feb 25.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cardiac Medicine, National Heart and Lung Institute, Imperial College London, Dovehouse Street, London SW3 6LY, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20185685" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Compartmentation ; Cell Membrane/*metabolism/ultrastructure ; Chronic Disease ; Cyclic AMP/*metabolism ; Cyclic AMP-Dependent Protein Kinases/metabolism ; Cytosol/metabolism ; Fluorescence Resonance Energy Transfer ; Heart Failure/*metabolism/*pathology ; Male ; Mice ; Mice, Knockout ; Mice, Transgenic ; Microscopy/methods ; Myocytes, Cardiac/*metabolism/ultrastructure ; Rats ; Rats, Sprague-Dawley ; Receptors, Adrenergic, beta-1/genetics/metabolism ; Receptors, Adrenergic, beta-2/genetics/*metabolism ; Sarcolemma/*metabolism/ultrastructure ; Signal Transduction
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 3
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    Cell biology. The case for RNA (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-11-27
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Liu, Chang C -- Arkin, Adam P -- New York, N.Y. -- Science. 2010 Nov 26;330(6008):1185-6. doi: 10.1126/science.1199495.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Bioengineering, University of California, Berkeley, CA 94720, USA. ccliu@berkeley.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21109657" target="_blank"〉PubMed〈/a〉
    Keywords: Alternative Splicing ; Apoptosis ; Aptamers, Nucleotide/chemistry/genetics/*metabolism ; Artificial Gene Fusion ; Biotechnology ; Ganciclovir/pharmacology ; *Gene Expression Regulation ; *Genetic Engineering ; Humans ; Introns ; NF-kappa B/genetics/metabolism ; Nucleic Acid Conformation ; Protein Biosynthesis ; RNA/chemistry/genetics/*metabolism ; Signal Transduction ; beta Catenin/genetics/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 4
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    The control of the metabolic switch in cancers by oncogenes and tumor suppressor genes (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-12-04
    Description: Cells from some tumors use an altered metabolic pattern compared with that of normal differentiated adult cells in the body. Tumor cells take up much more glucose and mainly process it through aerobic glycolysis, producing large quantities of secreted lactate with a lower use of oxidative phosphorylation that would generate more adenosine triphosphate (ATP), water, and carbon dioxide. This is the Warburg effect, which provides substrates for cell growth and division and free energy (ATP) from enhanced glucose use. This metabolic switch places the emphasis on producing intermediates for cell growth and division, and it is regulated by both oncogenes and tumor suppressor genes in a number of key cancer-producing pathways. Blocking these metabolic pathways or restoring these altered pathways could lead to a new approach in cancer treatments.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Levine, Arnold J -- Puzio-Kuter, Anna M -- New York, N.Y. -- Science. 2010 Dec 3;330(6009):1340-4. doi: 10.1126/science.1193494.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute for Advanced Study, Princeton, NJ 08540, USA. alevine@ias.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21127244" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Triphosphate/metabolism ; Cell Division ; Citric Acid Cycle ; Gene Expression Regulation, Neoplastic ; *Genes, Tumor Suppressor ; Glucose/metabolism ; Glutamine/metabolism ; Glycolysis ; Humans ; NADP/metabolism ; Neoplasms/drug therapy/*genetics/*metabolism/pathology ; *Oncogenes ; Pentose Phosphate Pathway ; Signal Transduction
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 5
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    Covering a broad dynamic range: information processing at the erythropoietin receptor (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-05-22
    Description: Cell surface receptors convert extracellular cues into receptor activation, thereby triggering intracellular signaling networks and controlling cellular decisions. A major unresolved issue is the identification of receptor properties that critically determine processing of ligand-encoded information. We show by mathematical modeling of quantitative data and experimental validation that rapid ligand depletion and replenishment of the cell surface receptor are characteristic features of the erythropoietin (Epo) receptor (EpoR). The amount of Epo-EpoR complexes and EpoR activation integrated over time corresponds linearly to ligand input; this process is carried out over a broad range of ligand concentrations. This relation depends solely on EpoR turnover independent of ligand binding, which suggests an essential role of large intracellular receptor pools. These receptor properties enable the system to cope with basal and acute demand in the hematopoietic system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Becker, Verena -- Schilling, Marcel -- Bachmann, Julie -- Baumann, Ute -- Raue, Andreas -- Maiwald, Thomas -- Timmer, Jens -- Klingmuller, Ursula -- New York, N.Y. -- Science. 2010 Jun 11;328(5984):1404-8. doi: 10.1126/science.1184913. Epub 2010 May 20.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division Systems Biology of Signal Transduction, DKFZ-ZMBH Alliance, German Cancer Research Center, 69120 Heidelberg, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20488988" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Cell Membrane/*metabolism ; Computer Simulation ; Endocytosis ; Epoetin Alfa ; Erythropoietin/metabolism/pharmacology ; Kinetics ; Ligands ; Mice ; Models, Biological ; Protein Binding ; Receptors, Erythropoietin/*metabolism ; Recombinant Proteins ; Signal Transduction
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 6
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    Identification of RACK1 and protein kinase Calpha as integral components of the mammalian circadian clock (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-01-23
    Description: At the core of the mammalian circadian clock is a negative feedback loop in which the dimeric transcription factor CLOCK-BMAL1 drives processes that in turn suppress its transcriptional activity. To gain insight into the mechanisms of circadian feedback, we analyzed mouse protein complexes containing BMAL1. Receptor for activated C kinase-1 (RACK1) and protein kinase C-alpha (PKCalpha) were recruited in a circadian manner into a nuclear BMAL1 complex during the negative feedback phase of the cycle. Overexpression of RACK1 and PKCalpha suppressed CLOCK-BMAL1 transcriptional activity, and RACK1 stimulated phosphorylation of BMAL1 by PKCalpha in vitro. Depletion of endogenous RACK1 or PKCalpha from fibroblasts shortened the circadian period, demonstrating that both molecules function in the clock oscillatory mechanism. Thus, the classical PKC signaling pathway is not limited to relaying external stimuli but is rhythmically activated by internal processes, forming an integral part of the circadian feedback loop.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Robles, Maria S -- Boyault, Cyril -- Knutti, Darko -- Padmanabhan, Kiran -- Weitz, Charles J -- New York, N.Y. -- Science. 2010 Jan 22;327(5964):463-6. doi: 10.1126/science.1180067.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurobiology, Harvard Medical School, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20093473" target="_blank"〉PubMed〈/a〉
    Keywords: ARNTL Transcription Factors/metabolism ; Animals ; CLOCK Proteins/metabolism ; Cell Nucleus/metabolism ; Circadian Rhythm/*physiology ; Feedback, Physiological ; Fibroblasts/metabolism/physiology ; Mice ; Mice, Inbred C57BL ; Neuropeptides/genetics/*metabolism ; Phosphorylation ; Protein Binding ; Protein Kinase C-alpha/*metabolism ; RNA Interference ; Signal Transduction ; Transcription, Genetic
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 7
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    Rewiring of genetic networks in response to DNA damage (2010)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2010-12-04
    Description: Although cellular behaviors are dynamic, the networks that govern these behaviors have been mapped primarily as static snapshots. Using an approach called differential epistasis mapping, we have discovered widespread changes in genetic interaction among yeast kinases, phosphatases, and transcription factors as the cell responds to DNA damage. Differential interactions uncover many gene functions that go undetected in static conditions. They are very effective at identifying DNA repair pathways, highlighting new damage-dependent roles for the Slt2 kinase, Pph3 phosphatase, and histone variant Htz1. The data also reveal that protein complexes are generally stable in response to perturbation, but the functional relations between these complexes are substantially reorganized. Differential networks chart a new type of genetic landscape that is invaluable for mapping cellular responses to stimuli.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3006187/" 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/PMC3006187/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bandyopadhyay, Sourav -- Mehta, Monika -- Kuo, Dwight -- Sung, Min-Kyung -- Chuang, Ryan -- Jaehnig, Eric J -- Bodenmiller, Bernd -- Licon, Katherine -- Copeland, Wilbert -- Shales, Michael -- Fiedler, Dorothea -- Dutkowski, Janusz -- Guenole, Aude -- van Attikum, Haico -- Shokat, Kevan M -- Kolodner, Richard D -- Huh, Won-Ki -- Aebersold, Ruedi -- Keogh, Michael-Christopher -- Krogan, Nevan J -- Ideker, Trey -- P30CA013330/CA/NCI NIH HHS/ -- P50 GM081879/GM/NIGMS NIH HHS/ -- R01 ES014811/ES/NIEHS NIH HHS/ -- R01 ES014811-01A1/ES/NIEHS NIH HHS/ -- R01 ES014811-02/ES/NIEHS NIH HHS/ -- R01 ES014811-02S1/ES/NIEHS NIH HHS/ -- R01 ES014811-03/ES/NIEHS NIH HHS/ -- R01 ES014811-04/ES/NIEHS NIH HHS/ -- R01 ES014811-05/ES/NIEHS NIH HHS/ -- R01 ES014811-05S1/ES/NIEHS NIH HHS/ -- R01 ES014811-06/ES/NIEHS NIH HHS/ -- R01 GM026017/GM/NIGMS NIH HHS/ -- R01 GM084279/GM/NIGMS NIH HHS/ -- R01 GM084279-01A1/GM/NIGMS NIH HHS/ -- R01 GM084279-02/GM/NIGMS NIH HHS/ -- R01 GM084279-02S1/GM/NIGMS NIH HHS/ -- R01 GM084279-03/GM/NIGMS NIH HHS/ -- R01 GM084279-04/GM/NIGMS NIH HHS/ -- R01 GM084448/GM/NIGMS NIH HHS/ -- R01-ES14811/ES/NIEHS NIH HHS/ -- R01-GM084279/GM/NIGMS NIH HHS/ -- R37 GM026017/GM/NIGMS NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2010 Dec 3;330(6009):1385-9. doi: 10.1126/science.1195618.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, University of California, San Diego, La Jolla, CA 92093, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21127252" target="_blank"〉PubMed〈/a〉
    Keywords: Chromatin/metabolism ; *DNA Damage ; DNA Repair/*genetics ; DNA, Fungal/genetics ; *Epistasis, Genetic ; *Gene Regulatory Networks ; Genes, Fungal ; Histones/genetics/metabolism ; Methyl Methanesulfonate/pharmacology ; Mitogen-Activated Protein Kinases/genetics/metabolism ; Mutagens/pharmacology ; Mutation ; Phosphoprotein Phosphatases/genetics/metabolism ; Protein Interaction Mapping ; Protein-Serine-Threonine Kinases/genetics/metabolism ; Saccharomyces cerevisiae/*genetics/*metabolism ; Saccharomyces cerevisiae Proteins/genetics/*metabolism ; Signal Transduction ; Transcription Factors/genetics/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 8
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    Cell biology. Septins at the nexus (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-09-11
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barral, Yves -- New York, N.Y. -- Science. 2010 Sep 10;329(5997):1289-90. doi: 10.1126/science.1195445.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Biochemistry, ETH Zurich, 8093 Zurich, Switzerland. yves.barral@bc.biol.ethz.ch〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20829470" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Membrane/metabolism/ultrastructure ; *Cell Polarity ; Centrioles/metabolism ; Cilia/*metabolism/ultrastructure ; Cytoskeletal Proteins/chemistry/*metabolism ; Diffusion ; GTP-Binding Proteins/chemistry/*metabolism ; Glycoproteins/genetics/metabolism ; Hedgehog Proteins/metabolism ; Humans ; Mutant Proteins/metabolism ; Mutation ; Receptors, Cell Surface/metabolism ; Signal Transduction ; Xenopus Proteins/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 9
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    Restriction of receptor movement alters cellular response: physical force sensing by EphA2 (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-03-13
    Description: Activation of the EphA2 receptor tyrosine kinase by ephrin-A1 ligands presented on apposed cell surfaces plays important roles in development and exhibits poorly understood functional alterations in cancer. We reconstituted this intermembrane signaling geometry between live EphA2-expressing human breast cancer cells and supported membranes displaying laterally mobile ephrin-A1. Receptor-ligand binding, clustering, and subsequent lateral transport within this junction were observed. EphA2 transport can be blocked by physical barriers nanofabricated onto the underlying substrate. This physical reorganization of EphA2 alters the cellular response to ephrin-A1, as observed by changes in cytoskeleton morphology and recruitment of a disintegrin and metalloprotease 10. Quantitative analysis of receptor-ligand spatial organization across a library of 26 mammary epithelial cell lines reveals characteristic differences that strongly correlate with invasion potential. These observations reveal a mechanism for spatio-mechanical regulation of EphA2 signaling pathways.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2895569/" 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/PMC2895569/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Salaita, Khalid -- Nair, Pradeep M -- Petit, Rebecca S -- Neve, Richard M -- Das, Debopriya -- Gray, Joe W -- Groves, Jay T -- P50 CA 58207/CA/NCI NIH HHS/ -- P50 CA058207/CA/NCI NIH HHS/ -- P50 CA058207-060002/CA/NCI NIH HHS/ -- P50 CA058207-08/CA/NCI NIH HHS/ -- P50 CA058207-09/CA/NCI NIH HHS/ -- U54 CA 112970/CA/NCI NIH HHS/ -- U54 CA112970/CA/NCI NIH HHS/ -- U54 CA112970-01/CA/NCI NIH HHS/ -- U54 CA143836/CA/NCI NIH HHS/ -- U54 CA143836-01/CA/NCI NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2010 Mar 12;327(5971):1380-5. doi: 10.1126/science.1181729.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Department of Chemistry, University of California, Berkeley, CA 94720, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20223987" target="_blank"〉PubMed〈/a〉
    Keywords: ADAM Proteins/metabolism ; Actomyosin/physiology ; Amyloid Precursor Protein Secretases/metabolism ; Antigens, CD44/metabolism ; Breast Neoplasms/*metabolism/pathology ; Cell Line, Tumor ; Cell Membrane/metabolism ; Cell Shape ; Cytoskeleton/physiology/ultrastructure ; Ephrin-A1/*chemistry/*metabolism ; Female ; Humans ; Ligands ; Lipid Bilayers ; *Mechanotransduction, Cellular ; Membrane Proteins/metabolism ; Neoplasm Invasiveness ; Protein Binding ; Protein Multimerization ; Protein Transport ; Receptor, EphA2/*chemistry/*metabolism ; Signal Transduction
    Print ISSN: 0036-8075
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  • 10
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    Activation of beta-catenin in dendritic cells regulates immunity versus tolerance in the intestine (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-08-14
    Description: Dendritic cells (DCs) play a vital role in initiating robust immunity against pathogens as well as maintaining immunological tolerance to self antigens. However, the intracellular signaling networks that program DCs to become tolerogenic remain unknown. We report here that the Wnt-beta-catenin signaling in intestinal dendritic cells regulates the balance between inflammatory versus regulatory responses in the gut. beta-catenin in intestinal dendritic cells was required for the expression of anti-inflammatory mediators such as retinoic acid-metabolizing enzymes, interleukin-10, and transforming growth factor-beta, and the stimulation of regulatory T cell induction while suppressing inflammatory effector T cells. Furthermore, ablation of beta-catenin expression in DCs enhanced inflammatory responses and disease in a mouse model of inflammatory bowel disease. Thus, beta-catenin signaling programs DCs to a tolerogenic state, limiting the inflammatory response.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3732486/" 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/PMC3732486/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Manicassamy, Santhakumar -- Reizis, Boris -- Ravindran, Rajesh -- Nakaya, Helder -- Salazar-Gonzalez, Rosa Maria -- Wang, Yi-Chong -- Pulendran, Bali -- HHSN266 200700006C/PHS HHS/ -- N01 AI50019/AI/NIAID NIH HHS/ -- N01 AI50025/AI/NIAID NIH HHS/ -- R01 AI048638/AI/NIAID NIH HHS/ -- R01 AI056499/AI/NIAID NIH HHS/ -- R01 DK057665/DK/NIDDK NIH HHS/ -- R01DK057665,/DK/NIDDK NIH HHS/ -- R37 AI048638/AI/NIAID NIH HHS/ -- R37 DK057665/DK/NIDDK NIH HHS/ -- R37AI48638,/AI/NIAID NIH HHS/ -- U19 AI057266/AI/NIAID NIH HHS/ -- U19AI057266,/AI/NIAID NIH HHS/ -- U54 AI057157/AI/NIAID NIH HHS/ -- U54AI057157/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2010 Aug 13;329(5993):849-53. doi: 10.1126/science.1188510.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Emory Vaccine Center, and Yerkes National Primate Research Center, 954 Gatewood Road, Atlanta, GA 30329, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20705860" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cytokines/metabolism ; Dendritic Cells/*immunology/metabolism ; Gene Expression Profiling ; *Inflammation ; Inflammatory Bowel Diseases/*immunology ; Intestinal Mucosa/cytology/*immunology/metabolism ; Macrophages/immunology/metabolism ; Male ; Mice ; Mice, Inbred C57BL ; Mice, Transgenic ; Oligonucleotide Array Sequence Analysis ; *Self Tolerance ; Signal Transduction ; T-Lymphocytes, Helper-Inducer/cytology/*immunology ; T-Lymphocytes, Regulatory/*immunology ; Tretinoin/metabolism ; Wnt Proteins/metabolism ; beta Catenin/*metabolism
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  • 11
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    Cyclooxygenase-2 controls energy homeostasis in mice by de novo recruitment of brown adipocytes (2010)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2010-05-08
    Description: Obesity results from chronic energy surplus and excess lipid storage in white adipose tissue (WAT). In contrast, brown adipose tissue (BAT) efficiently burns lipids through adaptive thermogenesis. Studying mouse models, we show that cyclooxygenase (COX)-2, a rate-limiting enzyme in prostaglandin (PG) synthesis, is a downstream effector of beta-adrenergic signaling in WAT and is required for the induction of BAT in WAT depots. PG shifted the differentiation of defined mesenchymal progenitors toward a brown adipocyte phenotype. Overexpression of COX-2 in WAT induced de novo BAT recruitment in WAT, increased systemic energy expenditure, and protected mice against high-fat diet-induced obesity. Thus, COX-2 appears integral to de novo BAT recruitment, which suggests that the PG pathway regulates systemic energy homeostasis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vegiopoulos, Alexandros -- Muller-Decker, Karin -- Strzoda, Daniela -- Schmitt, Iris -- Chichelnitskiy, Evgeny -- Ostertag, Anke -- Berriel Diaz, Mauricio -- Rozman, Jan -- Hrabe de Angelis, Martin -- Nusing, Rolf M -- Meyer, Carola W -- Wahli, Walter -- Klingenspor, Martin -- Herzig, Stephan -- New York, N.Y. -- Science. 2010 May 28;328(5982):1158-61. doi: 10.1126/science.1186034. Epub 2010 May 6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Emmy Noether and Marie Curie Research Group Molecular Metabolic Control, German Cancer Research Center (DKFZ) Heidelberg, 69120 Heidelberg, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20448152" target="_blank"〉PubMed〈/a〉
    Keywords: Adipocytes, Brown/cytology/*physiology ; Adipogenesis ; Adipose Tissue ; Adipose Tissue, Brown/cytology/*physiology ; Adipose Tissue, White/enzymology/*physiology ; Adrenergic beta-3 Receptor Agonists ; Adrenergic beta-Agonists/pharmacology ; Animals ; Body Weight ; Cyclooxygenase 2/*genetics/*metabolism ; Dietary Fats/administration & dosage ; Dioxoles/pharmacology ; *Energy Metabolism ; Female ; Gene Expression Regulation, Enzymologic ; Homeostasis ; Male ; Mesenchymal Stromal Cells/cytology ; Mice ; Mice, Inbred C57BL ; Mice, Obese ; Mice, Transgenic ; Norepinephrine/metabolism ; Obesity/etiology/prevention & control ; Oxygen Consumption ; Prostaglandins/*metabolism ; Receptors, Adrenergic, beta-3/metabolism ; Signal Transduction ; *Thermogenesis
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 12
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    Cell biology. Burn out or fade away? (2010)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2010-03-06
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Topisirovic, Ivan -- Sonenberg, Nahum -- New York, N.Y. -- Science. 2010 Mar 5;327(5970):1210-1. doi: 10.1126/science.1187497.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, McGill University, Montreal, Quebec, H3A 1A3, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20203039" target="_blank"〉PubMed〈/a〉
    Keywords: AMP-Activated Protein Kinases/metabolism ; *Aging ; Animals ; Autophagy ; Caloric Restriction ; Drosophila Proteins/*genetics/metabolism/*physiology ; Drosophila melanogaster/genetics/metabolism/*physiology ; Feedback, Physiological ; Heat-Shock Proteins/*genetics/*physiology ; Metabolic Networks and Pathways ; Mitochondria/metabolism ; Models, Animal ; Oxidation-Reduction ; Oxidative Stress ; Protein Biosynthesis ; Protein Kinases/*metabolism ; Reactive Oxygen Species/metabolism ; Signal Transduction ; TOR Serine-Threonine Kinases
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 13
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    Changing face of microglia (2010)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2010-11-06
    Description: Microglia are resident brain cells that sense pathological tissue alterations. They can develop into brain macrophages and perform immunological functions. However, expression of immune proteins by microglia is not synonymous with inflammation, because these molecules can have central nervous system (CNS)-specific roles. Through their involvement in pain mechanisms, microglia also respond to external threats. Experimental studies support the idea that microglia have a role in the maintenance of synaptic integrity. Analogous to electricians, they are capable of removing defunct axon terminals, thereby helping neuronal connections to stay intact. Microglia in healthy CNS tissue do not qualify as macrophages, and their specific functions are beginning to be explored.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Graeber, Manuel B -- New York, N.Y. -- Science. 2010 Nov 5;330(6005):783-8. doi: 10.1126/science.1190929.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Brain and Mind Research Institute, University of Sydney, Camperdown, NSW 2050, Australia. manuel@graeber.net〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21051630" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Behavior ; Behavior, Animal ; Bone Marrow Transplantation ; Brain/*cytology/pathology/physiology ; Brain Diseases/pathology/physiopathology/therapy ; Humans ; Macrophages/cytology/physiology ; Mental Disorders/physiopathology ; Microglia/immunology/*physiology ; Mutation ; Neuralgia/physiopathology ; Neurodegenerative Diseases/pathology/physiopathology/therapy ; Signal Transduction ; Spinal Cord/*cytology/pathology/physiology ; Synapses/physiology
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  • 14
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    The onset of collective behavior in social amoebae (2010)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2010-04-24
    Description: In the social amoebae Dictyostelium discoideum, periodic synthesis and release of extracellular cyclic adenosine 3',5'-monophosphate (cAMP) guide cell aggregation and commitment to form fruiting bodies. It is unclear whether these oscillations are an intrinsic property of individual cells or if they exist only as a population-level phenomenon. Here, we showed by live-cell imaging of intact cell populations that pulses originate from a discrete location despite constant exchange of cells to and from the region. In a perfusion chamber, both isolated single cells and cell populations switched from quiescence to rhythmic activity depending on the concentration of extracellular cAMP. A quantitative analysis showed that stochastic pulsing of individual cells below the threshold concentration of extracellular cAMP plays a critical role in the onset of collective behavior.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3120019/" 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/PMC3120019/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gregor, Thomas -- Fujimoto, Koichi -- Masaki, Noritaka -- Sawai, Satoshi -- P50 GM071508/GM/NIGMS NIH HHS/ -- P50 GM071508-08/GM/NIGMS NIH HHS/ -- R01 GM098407/GM/NIGMS NIH HHS/ -- R01 GM098407-01A1/GM/NIGMS NIH HHS/ -- R01 GM098407-02/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2010 May 21;328(5981):1021-5. doi: 10.1126/science.1183415. Epub 2010 Apr 22.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Graduate School of Arts and Sciences, University of Tokyo, Tokyo 153-8902, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20413456" target="_blank"〉PubMed〈/a〉
    Keywords: 3',5'-Cyclic-AMP Phosphodiesterases/metabolism ; Adenylyl Cyclases/metabolism ; Cell Aggregation ; Cell Count ; Cyclic AMP/*metabolism/pharmacology ; Cyclic AMP-Dependent Protein Kinases/genetics/metabolism ; Cytosol/metabolism ; Dictyostelium/cytology/genetics/growth & development/*physiology ; Fluorescence Resonance Energy Transfer ; Models, Biological ; Periodicity ; Protozoan Proteins/genetics/metabolism ; Quorum Sensing ; Signal Transduction ; Stochastic Processes
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    Secreted peptide signals required for maintenance of root stem cell niche in Arabidopsis (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-08-28
    Description: Stem cells are maintained in the niche by intercellular interactions and signaling networks. In this work, we study extracellular signals required for maintenance of the root stem cell niche in higher plants. We identify a family of functionally redundant homologous peptides that are secreted, tyrosine-sulfated, and expressed mainly in the stem cell area and the innermost layer of central columella cells. We name these peptides root meristem growth factors (RGFs). RGFs are required for maintenance of the root stem cell niche and transit amplifying cell proliferation in Arabidopsis. RGF1 defines expression levels and patterns of the stem cell transcription factor PLETHORA, mainly at the posttranscriptional level. The RGFs function independently of the auxin pathway. These peptide signals play a crucial role in postembryonic root development.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Matsuzaki, Yo -- Ogawa-Ohnishi, Mari -- Mori, Ayaka -- Matsubayashi, Yoshikatsu -- New York, N.Y. -- Science. 2010 Aug 27;329(5995):1065-7. doi: 10.1126/science.1191132.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Graduate School of Bio-Agricultural Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20798316" target="_blank"〉PubMed〈/a〉
    Keywords: Arabidopsis/cytology/genetics/growth & development/*physiology ; Arabidopsis Proteins/genetics/*metabolism/secretion ; Cell Proliferation ; Gene Expression Regulation, Plant ; Genes, Plant ; Indoleacetic Acids/metabolism ; Meristem/cytology/growth & development/physiology ; Peptides/genetics/*metabolism/secretion ; Phenotype ; Plant Growth Regulators/genetics/*metabolism ; Plant Roots/*cytology/growth & development/physiology ; Plants, Genetically Modified ; Recombinant Fusion Proteins/metabolism ; Signal Transduction ; Stem Cell Niche/*physiology ; Stem Cells/cytology/*physiology ; Sulfotransferases/genetics/metabolism ; Transcription Factors/genetics/metabolism ; Up-Regulation
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    A transient niche regulates the specification of Drosophila intestinal stem cells (2010)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2010-01-09
    Description: Stem cell niches are locations where stem cells reside and self-renew. Although studies have shown how niches maintain stem cell fate during tissue homeostasis, less is known about their roles in establishing stem cells. The adult Drosophila midgut is maintained by intestinal stem cells (ISCs); however, how they are established is unknown. Here, we show that an ISC progenitor generates a niche cell via Notch signaling. This niche uses the bone morphogenetic protein 2/4 homolog, decapentaplegic, to allow progenitors to divide in an undifferentiated state and subsequently breaks down and dies, resulting in the specification of ISCs in the adult midgut. Our results demonstrate a paradigm for stem cell-niche biology, where progenitors generate transient niches that determine stem cell fate and may give insights into stem cell specification in other tissues.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2857772/" 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/PMC2857772/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mathur, Divya -- Bost, Alyssa -- Driver, Ian -- Ohlstein, Benjamin -- R01 DK082456/DK/NIDDK NIH HHS/ -- R01 DK082456-01/DK/NIDDK NIH HHS/ -- T32 GM007088/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2010 Jan 8;327(5962):210-3. doi: 10.1126/science.1181958.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Genetics and Development, Columbia University Medical Center, New York, NY 10032, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20056890" target="_blank"〉PubMed〈/a〉
    Keywords: Adult Stem Cells/*cytology/physiology ; Animals ; Cell Differentiation ; Cell Lineage ; Cell Proliferation ; Drosophila/*cytology/growth & development/metabolism ; Drosophila Proteins/genetics/metabolism ; Enterocytes/cytology ; Epithelial Cells/*cytology ; Intestines/cytology/growth & development ; Larva/cytology/growth & development/metabolism ; Metamorphosis, Biological ; Organogenesis ; Receptors, Notch/metabolism ; Signal Transduction ; Stem Cell Niche/*physiology
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    Loss of Rap1 induces telomere recombination in the absence of NHEJ or a DNA damage signal (2010)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2010-03-27
    Description: Shelterin is an essential telomeric protein complex that prevents DNA damage signaling and DNA repair at mammalian chromosome ends. Here we report on the role of the TRF2-interacting factor Rap1, a conserved shelterin subunit of unknown function. We removed Rap1 from mouse telomeres either through gene deletion or by replacing TRF2 with a mutant that does not bind Rap1. Rap1 was dispensable for the essential functions of TRF2--repression of ATM kinase signaling and nonhomologous end joining (NHEJ)--and mice lacking telomeric Rap1 were viable and fertile. However, Rap1 was critical for the repression of homology-directed repair (HDR), which can alter telomere length. The data reveal that HDR at telomeres can take place in the absence of DNA damage foci and underscore the functional compartmentalization within shelterin.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2864730/" 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/PMC2864730/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sfeir, Agnel -- Kabir, Shaheen -- van Overbeek, Megan -- Celli, Giulia B -- de Lange, Titia -- AG016642/AG/NIA NIH HHS/ -- GM049046/GM/NIGMS NIH HHS/ -- R01 AG016642/AG/NIA NIH HHS/ -- R01 AG016642-01/AG/NIA NIH HHS/ -- R01 AG016642-02/AG/NIA NIH HHS/ -- R01 AG016642-03/AG/NIA NIH HHS/ -- R01 AG016642-04/AG/NIA NIH HHS/ -- R01 AG016642-05/AG/NIA NIH HHS/ -- R01 AG016642-06/AG/NIA NIH HHS/ -- R01 AG016642-07/AG/NIA NIH HHS/ -- R01 AG016642-08/AG/NIA NIH HHS/ -- R01 AG016642-09/AG/NIA NIH HHS/ -- R01 AG016642-10/AG/NIA NIH HHS/ -- R01 AG016642-11/AG/NIA NIH HHS/ -- R01 GM049046/GM/NIGMS NIH HHS/ -- R01 GM049046-07/GM/NIGMS NIH HHS/ -- R01 GM049046-08/GM/NIGMS NIH HHS/ -- R01 GM049046-09/GM/NIGMS NIH HHS/ -- R01 GM049046-10/GM/NIGMS NIH HHS/ -- R01 GM049046-11/GM/NIGMS NIH HHS/ -- R01 GM049046-12/GM/NIGMS NIH HHS/ -- R37 GM049046/GM/NIGMS NIH HHS/ -- R37 GM049046-13/GM/NIGMS NIH HHS/ -- R37 GM049046-14/GM/NIGMS NIH HHS/ -- R37 GM049046-15/GM/NIGMS NIH HHS/ -- R37 GM049046-16/GM/NIGMS NIH HHS/ -- R37 GM049046-17/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2010 Mar 26;327(5973):1657-61. doi: 10.1126/science.1185100.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Rockefeller University, 1230 York Avenue, New York, NY 10065, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20339076" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Ataxia Telangiectasia Mutated Proteins ; Cell Cycle Proteins/metabolism ; Cell Proliferation ; Cells, Cultured ; Checkpoint Kinase 2 ; *DNA Damage ; *DNA Repair ; DNA-Binding Proteins/metabolism ; Gene Deletion ; Mice ; Mice, Inbred C57BL ; Mice, Knockout ; Molecular Sequence Data ; Protein-Serine-Threonine Kinases/metabolism ; Recombination, Genetic ; Signal Transduction ; Sister Chromatid Exchange ; Telomere/*genetics/metabolism ; Telomere-Binding Proteins/chemistry/*genetics/*metabolism ; Telomeric Repeat Binding Protein 2/genetics/metabolism ; Tumor Suppressor Proteins/metabolism
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  • 18
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    Sfrp5 is an anti-inflammatory adipokine that modulates metabolic dysfunction in obesity (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-06-19
    Description: Adipose tissue secretes proteins referred to as adipokines, many of which promote inflammation and disrupt glucose homeostasis. Here we show that secreted frizzled-related protein 5 (Sfrp5), a protein previously linked to the Wnt signaling pathway, is an anti-inflammatory adipokine whose expression is perturbed in models of obesity and type 2 diabetes. Sfrp5-deficient mice fed a high-calorie diet developed severe glucose intolerance and hepatic steatosis, and their adipose tissue showed an accumulation of activated macrophages that was associated with activation of the c-Jun N-terminal kinase signaling pathway. Adenovirus-mediated delivery of Sfrp5 to mouse models of obesity ameliorated glucose intolerance and hepatic steatosis. Thus, in the setting of obesity, Sfrp5 secretion by adipocytes exerts salutary effects on metabolic dysfunction by controlling inflammatory cells within adipose tissue.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3132938/" 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/PMC3132938/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ouchi, Noriyuki -- Higuchi, Akiko -- Ohashi, Koji -- Oshima, Yuichi -- Gokce, Noyan -- Shibata, Rei -- Akasaki, Yuichi -- Shimono, Akihiko -- Walsh, Kenneth -- AG15052/AG/NIA NIH HHS/ -- AG34972/AG/NIA NIH HHS/ -- HL81587/HL/NHLBI NIH HHS/ -- HL86785/HL/NHLBI NIH HHS/ -- P01 HL081587/HL/NHLBI NIH HHS/ -- P01 HL081587-05/HL/NHLBI NIH HHS/ -- R01 AG015052/AG/NIA NIH HHS/ -- R01 AG015052-06/AG/NIA NIH HHS/ -- R01 AG034972/AG/NIA NIH HHS/ -- R01 AG034972-03/AG/NIA NIH HHS/ -- R01 HL086785/HL/NHLBI NIH HHS/ -- R01 HL086785-19/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 2010 Jul 23;329(5990):454-7. doi: 10.1126/science.1188280. Epub 2010 Jun 17.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Molecular Cardiology and Whitaker Cardiovascular Institute, Boston University School of Medicine, 715 Albany Street, W611, Boston, MA 02118, USA. nouchi@bu.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20558665" target="_blank"〉PubMed〈/a〉
    Keywords: 3T3-L1 Cells ; Adipocytes/*metabolism/pathology ; Adipokines/genetics/*metabolism ; Adipose Tissue/*metabolism/pathology ; Animals ; Dietary Fats/administration & dosage ; Dietary Sucrose/administration & dosage ; Fatty Liver/pathology/therapy ; Genetic Vectors ; Glucose/metabolism ; Humans ; Inflammation ; Insulin/metabolism ; Insulin Resistance ; Intercellular Signaling Peptides and Proteins/genetics/*metabolism ; Macrophages/*metabolism ; Mice ; Mice, Inbred C57BL ; Mice, Obese ; Mitogen-Activated Protein Kinase 8/genetics/metabolism ; Obesity/*metabolism/pathology ; Phosphorylation ; Rats ; Rats, Zucker ; Signal Transduction ; Wnt Proteins/metabolism
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    Parasympathetic innervation maintains epithelial progenitor cells during salivary organogenesis (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-10-12
    Description: The maintenance of a progenitor cell population as a reservoir of undifferentiated cells is required for organ development and regeneration. However, the mechanisms by which epithelial progenitor cells are maintained during organogenesis are poorly understood. We report that removal of the parasympathetic ganglion in mouse explant organ culture decreased the number and morphogenesis of keratin 5-positive epithelial progenitor cells. These effects were rescued with an acetylcholine analog. We demonstrate that acetylcholine signaling, via the muscarinic M1 receptor and epidermal growth factor receptor, increased epithelial morphogenesis and proliferation of the keratin 5-positive progenitor cells. Parasympathetic innervation maintained the epithelial progenitor cell population in an undifferentiated state, which was required for organogenesis. This mechanism for epithelial progenitor cell maintenance may be targeted for organ repair or regeneration.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3376907/" 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/PMC3376907/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Knox, S M -- Lombaert, I M A -- Reed, X -- Vitale-Cross, L -- Gutkind, J S -- Hoffman, M P -- Z99 DE999999/Intramural NIH HHS/ -- ZIA DE000707-08/Intramural NIH HHS/ -- ZIA DE000722-04/Intramural NIH HHS/ -- New York, N.Y. -- Science. 2010 Sep 24;329(5999):1645-7. doi: 10.1126/science.1192046.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Matrix and Morphogenesis Unit, Laboratory of Cell and Developmental Biology, National Institute of Dental and Craniofacial Research, NIH, 30 Convent Drive, Bethesda, MD 20892, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20929848" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylcholine/metabolism ; Animals ; Carbachol/metabolism/pharmacology ; Cell Differentiation ; Epithelial Cells/cytology/*physiology ; Epithelium/embryology/innervation ; Ganglia, Parasympathetic/cytology/embryology/*physiology ; Heparin-binding EGF-like Growth Factor ; Intercellular Signaling Peptides and Proteins/metabolism/pharmacology ; Keratin-5/analysis/genetics ; Male ; Mice ; Morphogenesis/drug effects ; Neurons/cytology/*physiology ; Organ Culture Techniques ; *Organogenesis ; Prostate/cytology/embryology/innervation ; Quinazolines/pharmacology ; Receptor, Epidermal Growth Factor/metabolism ; Receptor, Muscarinic M1/metabolism ; Regeneration ; Signal Transduction ; Stem Cells/cytology/*physiology ; Submandibular Gland/cytology/*embryology/*innervation
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Immunology. CAR'ing for the skin (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-09-04
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shaw, Andrey S -- Huang, Yina -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2010 Sep 3;329(5996):1154-5. doi: 10.1126/science.1195337.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pathology and Immunology and Howard Hughes Medical Institute, Washington University School of Medicine, St. Louis, MO 63110, USA. shaw@pathology.wustl.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20813941" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Adhesion Molecules/chemistry/*metabolism ; Coxsackie and Adenovirus Receptor-Like Membrane Protein ; Crystallization ; Epidermis/*immunology/metabolism/ultrastructure ; Hydrogen Bonding ; Ligands ; Lymphocyte Activation ; Mice ; Phosphatidylinositol 3-Kinases/metabolism ; Protein Binding ; Protein Interaction Domains and Motifs ; Protein Multimerization ; Receptors, Antigen, T-Cell, gamma-delta/*immunology/metabolism ; Receptors, Virus/chemistry/*metabolism ; Signal Transduction ; T-Lymphocyte Subsets/*immunology/*metabolism ; Tight Junctions/metabolism
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 21
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    Maize tumors caused by Ustilago maydis require organ-specific genes in host and pathogen (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-04-03
    Description: Infection of maize by corn smut (Ustilago maydis) provides an agronomically important model of biotrophic host-pathogen interactions. After penetration of the maize epidermis, fungal colonization of host tissue induces tumor formation on all aerial maize organs. We hypothesized that transformation of different primordia into plant tumors would require organ-specific gene expression by both host and pathogen and documented these differences by transcriptome profiling. Phenotypic screening of U. maydis mutants deleted for genes encoding secreted proteins and maize mutants with organ-specific defects confirmed organ-restricted tumorigenesis. This is the foundation for exploring how individual pathogen effectors, deployed in an organ-specific pattern, interact with host factors to reprogram normal ontogeny into a tumor pathway.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Skibbe, David S -- Doehlemann, Gunther -- Fernandes, John -- Walbot, Virginia -- New York, N.Y. -- Science. 2010 Apr 2;328(5974):89-92. doi: 10.1126/science.1185775.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, Stanford University, Stanford, CA 94305-5020, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20360107" target="_blank"〉PubMed〈/a〉
    Keywords: Flowers/genetics/microbiology ; Gene Expression ; Gene Expression Profiling ; Gene Expression Regulation, Fungal ; Gene Expression Regulation, Plant ; Genes, Fungal ; Genes, Plant ; Gibberellins/metabolism ; Host-Pathogen Interactions ; Oligonucleotide Array Sequence Analysis ; Phenotype ; Plant Leaves/genetics/microbiology ; Plant Tumors/*genetics/*microbiology ; Seedlings/genetics/microbiology ; Signal Transduction ; Up-Regulation ; Ustilago/*genetics/*physiology ; Zea mays/*genetics/*microbiology
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 22
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    Intravascular danger signals guide neutrophils to sites of sterile inflammation (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-10-16
    Description: Neutrophils are recruited from the blood to sites of sterile inflammation, where they contribute to wound healing but may also cause tissue damage. By using spinning disk confocal intravital microscopy, we examined the kinetics and molecular mechanisms of neutrophil recruitment to sites of focal hepatic necrosis in vivo. Adenosine triphosphate released from necrotic cells activated the Nlrp3 inflammasome to generate an inflammatory microenvironment that alerted circulating neutrophils to adhere within liver sinusoids. Subsequently, generation of an intravascular chemokine gradient directed neutrophil migration through healthy tissue toward foci of damage. Lastly, formyl-peptide signals released from necrotic cells guided neutrophils through nonperfused sinusoids into the injury. Thus, dynamic in vivo imaging revealed a multistep hierarchy of directional cues that guide neutrophil localization to sites of sterile inflammation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McDonald, Braedon -- Pittman, Keir -- Menezes, Gustavo B -- Hirota, Simon A -- Slaba, Ingrid -- Waterhouse, Christopher C M -- Beck, Paul L -- Muruve, Daniel A -- Kubes, Paul -- Canadian Institutes of Health Research/Canada -- New York, N.Y. -- Science. 2010 Oct 15;330(6002):362-6. doi: 10.1126/science.1195491.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Immunology Research Group, University of Calgary, Alberta T2N 4N1, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20947763" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Triphosphate/metabolism ; Animals ; Carrier Proteins/metabolism ; Cell Adhesion ; Chemokine CXCL2/metabolism ; Chemokines/metabolism ; Chemotaxis, Leukocyte ; Cues ; Endothelium, Vascular/physiology ; Inflammation/*immunology/metabolism/*pathology ; Kinetics ; Liver/blood supply/*immunology/metabolism/*pathology ; Liver Diseases/*immunology/metabolism/*pathology ; Macrophage-1 Antigen/physiology ; Mice ; Microscopy/methods ; Microscopy, Confocal ; Microvessels/physiology ; Necrosis ; *Neutrophil Infiltration ; Neutrophils/physiology ; Peptides/metabolism ; Receptors, Formyl Peptide/metabolism ; Receptors, Interleukin-8B/metabolism ; Receptors, Purinergic P2/metabolism ; Receptors, Purinergic P2X7 ; Signal Transduction
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 23
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    Vibrio cholerae VpsT regulates matrix production and motility by directly sensing cyclic di-GMP (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-02-13
    Description: Microorganisms can switch from a planktonic, free-swimming life-style to a sessile, colonial state, called a biofilm, which confers resistance to environmental stress. Conversion between the motile and biofilm life-styles has been attributed to increased levels of the prokaryotic second messenger cyclic di-guanosine monophosphate (c-di-GMP), yet the signaling mechanisms mediating such a global switch are poorly understood. Here we show that the transcriptional regulator VpsT from Vibrio cholerae directly senses c-di-GMP to inversely control extracellular matrix production and motility, which identifies VpsT as a master regulator for biofilm formation. Rather than being regulated by phosphorylation, VpsT undergoes a change in oligomerization on c-di-GMP binding.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2828054/" 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/PMC2828054/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Krasteva, Petya V -- Fong, Jiunn C N -- Shikuma, Nicholas J -- Beyhan, Sinem -- Navarro, Marcos V A S -- Yildiz, Fitnat H -- Sondermann, Holger -- 1R01GM081373/GM/NIGMS NIH HHS/ -- P30 EB009998/EB/NIBIB NIH HHS/ -- R01 AI055987/AI/NIAID NIH HHS/ -- R01 AI055987-06A1/AI/NIAID NIH HHS/ -- R01 GM081373/GM/NIGMS NIH HHS/ -- R01 GM081373-03/GM/NIGMS NIH HHS/ -- R01AI055987/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2010 Feb 12;327(5967):866-8. doi: 10.1126/science.1181185.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Medicine, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20150502" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Motifs ; Bacterial Proteins/chemistry/genetics/*metabolism ; Binding Sites ; Biofilms/*growth & development ; Crystallography, X-Ray ; Cyclic GMP/*analogs & derivatives/metabolism ; DNA, Bacterial/metabolism ; Dimerization ; Extracellular Matrix/*metabolism ; Gene Expression Profiling ; Gene Expression Regulation, Bacterial ; Models, Molecular ; Movement ; Point Mutation ; Polysaccharides, Bacterial/genetics/metabolism ; Protein Folding ; Protein Multimerization ; Protein Structure, Tertiary ; Signal Transduction ; Transcription Factors/chemistry/genetics/*metabolism ; Transcription, Genetic ; Vibrio cholerae O1/cytology/genetics/*physiology
    Print ISSN: 0036-8075
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    Medicine. Refugee receptors switch sides (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-03-27
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dorn, Gerald W 2nd -- R01 HL087871/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 2010 Mar 26;327(5973):1586-7. doi: 10.1126/science.1188538.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Internal Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA. gdorn@wustl.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20339055" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Compartmentation ; Cell Membrane/*metabolism/ultrastructure ; Cyclic AMP/*metabolism ; Heart Failure/*metabolism/pathology/physiopathology ; Humans ; Membrane Microdomains/metabolism ; Mice ; Myocardial Contraction ; Myocytes, Cardiac/*metabolism/ultrastructure ; Rats ; Receptors, Adrenergic, beta-1/*metabolism ; Receptors, Adrenergic, beta-2/*metabolism ; Sarcolemma/metabolism/ultrastructure ; Signal Transduction
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 25
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    Induction of lymphoidlike stroma and immune escape by tumors that express the chemokine CCL21 (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-03-27
    Description: Tumor manipulation of host immunity is important for tumor survival and invasion. Many cancers secrete CCL21, a chemoattractant for various leukocytes and lymphoid tissue inducer cells, which drive lymphoid neogenesis. CCL21 expression by melanoma tumors in mice was associated with an immunotolerant microenvironment, which included the induction of lymphoid-like reticular stromal networks, an altered cytokine milieu, and the recruitment of regulatory leukocyte populations. In contrast, CCL21-deficient tumors induced antigen-specific immunity. CCL21-mediated immune tolerance was dependent on host rather than tumor expression of the CCL21 receptor, CCR7, and could protect distant, coimplanted CCL21-deficient tumors and even nonsyngeneic allografts from rejection. We suggest that by altering the tumor microenvironment, CCL21-secreting tumors shift the host immune response from immunogenic to tolerogenic, which facilitates tumor progression.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shields, Jacqueline D -- Kourtis, Iraklis C -- Tomei, Alice A -- Roberts, Joanna M -- Swartz, Melody A -- New York, N.Y. -- Science. 2010 May 7;328(5979):749-52. doi: 10.1126/science.1185837. Epub 2010 Mar 25.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Bioengineering, Ecole Polytechnique Federale de Lausanne, 1015 Lausanne, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20339029" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigen-Presenting Cells/immunology ; CD8-Positive T-Lymphocytes/immunology ; Cell Line, Tumor ; Chemokine CCL21/*metabolism ; Cytokines/metabolism ; Disease Progression ; Female ; Immune Tolerance ; Lymph Nodes/immunology ; Lymphoid Tissue/*immunology/pathology ; Melanoma, Experimental/*immunology/*pathology ; Mice ; Mice, Inbred C57BL ; Neoplasm Transplantation ; RNA Interference ; Receptors, CCR7/metabolism ; Signal Transduction ; Stromal Cells/*immunology/pathology ; T-Lymphocytes/immunology ; T-Lymphocytes, Regulatory/immunology ; *Tumor Escape
    Print ISSN: 0036-8075
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  • 26
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    Structural sources of robustness in biochemical reaction networks (2010)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2010-03-13
    Description: In vivo variations in the concentrations of biomolecular species are inevitable. These variations in turn propagate along networks of chemical reactions and modify the concentrations of still other species, which influence biological activity. Because excessive variations in the amounts of certain active species might hamper cell function, regulation systems have evolved that act to maintain concentrations within tight bounds. We identify simple yet subtle structural attributes that impart concentration robustness to any mass-action network possessing them. We thereby describe a large class of robustness-inducing networks that already embraces two quite different biochemical modules for which concentration robustness has been observed experimentally: the Escherichia coli osmoregulation system EnvZ-OmpR and the glyoxylate bypass control system isocitrate dehydrogenase kinase-phosphatase-isocitrate dehydrogenase. The structural attributes identified here might confer robustness far more broadly.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shinar, Guy -- Feinberg, Martin -- 1R01GM086881-01/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2010 Mar 12;327(5971):1389-91. doi: 10.1126/science.1183372.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Cell Biology, Weizmann Institute of Science, Rehovot 76100, Israel.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20223989" target="_blank"〉PubMed〈/a〉
    Keywords: Bacterial Outer Membrane Proteins/*metabolism ; Bacterial Proteins/*metabolism ; Escherichia coli/*metabolism ; Escherichia coli Proteins/*metabolism ; Glyoxylates/metabolism ; Isocitrate Dehydrogenase/*metabolism ; *Metabolic Networks and Pathways ; Models, Biological ; Models, Chemical ; Multienzyme Complexes/*metabolism ; Osmolar Concentration ; Phosphorylation ; Signal Transduction ; Trans-Activators/*metabolism
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  • 27
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    Neuroscience. Lynx for braking plasticity (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-11-27
    Description: 〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3244692/" 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/PMC3244692/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Higley, Michael J -- Strittmatter, Stephen M -- R37 NS033020/NS/NINDS NIH HHS/ -- R37 NS033020-19/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 2010 Nov 26;330(6008):1189-90. doi: 10.1126/science.1198983.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Cellular Neuroscience, Neurodegeneration and Repair Program, Department of Neurology, Yale University School of Medicine, New Haven, CT 06536, USA. michael.higley@yale.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21109660" target="_blank"〉PubMed〈/a〉
    Keywords: Aging ; Amblyopia/physiopathology/therapy ; Animals ; Chondroitin Sulfate Proteoglycans/physiology ; *Dominance, Ocular ; Membrane Glycoproteins/*genetics/*physiology ; Mice ; Mice, Knockout ; *Neuronal Plasticity ; Neuropeptides/*genetics/*physiology ; Nicotinic Antagonists ; Receptors, Immunologic/physiology ; Receptors, Nicotinic/metabolism ; Sensory Deprivation ; Signal Transduction ; *Vision, Ocular ; Visual Cortex/*physiology ; Visual Pathways/physiology
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 28
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    mTORC1-mediated cell proliferation, but not cell growth, controlled by the 4E-BPs (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-05-29
    Description: The mammalian target of rapamycin complex 1 (mTORC1) integrates mitogen and nutrient signals to control cell proliferation and cell size. Hence, mTORC1 is implicated in a large number of human diseases--including diabetes, obesity, heart disease, and cancer--that are characterized by aberrant cell growth and proliferation. Although eukaryotic translation initiation factor 4E-binding proteins (4E-BPs) are critical mediators of mTORC1 function, their precise contribution to mTORC1 signaling and the mechanisms by which they mediate mTORC1 function have remained unclear. We inhibited the mTORC1 pathway in cells lacking 4E-BPs and analyzed the effects on cell size, cell proliferation, and cell cycle progression. Although the 4E-BPs had no effect on cell size, they inhibited cell proliferation by selectively inhibiting the translation of messenger RNAs that encode proliferation-promoting proteins and proteins involved in cell cycle progression. Thus, control of cell size and cell cycle progression appear to be independent in mammalian cells, whereas in lower eukaryotes, 4E-BPs influence both cell growth and proliferation.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2893390/" 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/PMC2893390/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dowling, Ryan J O -- Topisirovic, Ivan -- Alain, Tommy -- Bidinosti, Michael -- Fonseca, Bruno D -- Petroulakis, Emmanuel -- Wang, Xiaoshan -- Larsson, Ola -- Selvaraj, Anand -- Liu, Yi -- Kozma, Sara C -- Thomas, George -- Sonenberg, Nahum -- P50 NS057531/NS/NINDS NIH HHS/ -- P50 NS057531-01A2/NS/NINDS NIH HHS/ -- R01 DK078019/DK/NIDDK NIH HHS/ -- R01 DK73802/DK/NIDDK NIH HHS/ -- U01 CA84292-06/CA/NCI NIH HHS/ -- Canadian Institutes of Health Research/Canada -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2010 May 28;328(5982):1172-6. doi: 10.1126/science.1187532.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Goodman Cancer Research Centre, McGill University, Montreal, Quebec H3A 1A3, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20508131" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Carrier Proteins/genetics/*metabolism ; Cell Cycle ; *Cell Enlargement ; Cell Line ; *Cell Proliferation ; Cell Size ; Cell Survival ; Eukaryotic Initiation Factors/genetics/*metabolism ; Humans ; Mice ; Mice, Knockout ; Multiprotein Complexes ; Phosphoproteins/genetics/*metabolism ; Phosphorylation ; Protein Biosynthesis ; Proteins ; RNA, Messenger/genetics/metabolism ; Ribosomal Protein S6 Kinases/metabolism ; Signal Transduction ; Sirolimus/pharmacology ; TOR Serine-Threonine Kinases ; Transcription Factors/*metabolism
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 29
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    Dopaminergic network differences in human impulsivity (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-07-31
    Description: Dopamine (DA) has long been implicated in impulsivity, but the precise mechanisms linking human variability in DA signaling to differences in impulsive traits remain largely unknown. By using a dual-scan positron emission tomography approach in healthy human volunteers with amphetamine and the D2/D3 ligand [18F]fallypride, we found that higher levels of trait impulsivity were predicted by diminished midbrain D2/D3 autoreceptor binding and greater amphetamine-induced DA release in the striatum, which was in turn associated with stimulant craving. Path analysis confirmed that the impact of decreased midbrain D2/D3 autoreceptor availability on trait impulsivity is mediated in part through its effect on stimulated striatal DA release.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3161413/" 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/PMC3161413/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Buckholtz, Joshua W -- Treadway, Michael T -- Cowan, Ronald L -- Woodward, Neil D -- Li, Rui -- Ansari, M Sib -- Baldwin, Ronald M -- Schwartzman, Ashley N -- Shelby, Evan S -- Smith, Clarence E -- Kessler, Robert M -- Zald, David H -- R01 DA019670/DA/NIDA NIH HHS/ -- R01 DA019670-04/DA/NIDA NIH HHS/ -- R01DA019670-04/DA/NIDA NIH HHS/ -- T32 MH018921/MH/NIMH NIH HHS/ -- T32 MH018921-22/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 2010 Jul 30;329(5991):532. doi: 10.1126/science.1185778.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Psychology, Vanderbilt University, Nashville, TN 37240, USA. joshua.buckholtz@vanderbilt.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20671181" target="_blank"〉PubMed〈/a〉
    Keywords: Adolescent ; Adult ; Amphetamine-Related Disorders/etiology/metabolism ; Autoreceptors/metabolism ; Benzamides/metabolism ; Corpus Striatum/*metabolism ; Dextroamphetamine/*administration & dosage ; Dopamine/*metabolism ; Female ; Humans ; Impulsive Behavior/*metabolism ; Ligands ; Male ; Positron-Emission Tomography ; Pyrrolidines/metabolism ; Receptors, Dopamine D2/metabolism ; Receptors, Dopamine D3/*metabolism ; Signal Transduction ; Substantia Nigra/metabolism ; Tegmentum Mesencephali/*metabolism ; Ventral Tegmental Area/metabolism ; Young Adult
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    Temperature as a universal resetting cue for mammalian circadian oscillators (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-10-16
    Description: Environmental temperature cycles are a universal entraining cue for all circadian systems at the organismal level with the exception of homeothermic vertebrates. We report here that resistance to temperature entrainment is a property of the suprachiasmatic nucleus (SCN) network and is not a cell-autonomous property of mammalian clocks. This differential sensitivity to temperature allows the SCN to drive circadian rhythms in body temperature, which can then act as a universal cue for the entrainment of cell-autonomous oscillators throughout the body. Pharmacological experiments show that network interactions in the SCN are required for temperature resistance and that the heat shock pathway is integral to temperature resetting and temperature compensation in mammalian cells. These results suggest that the evolutionarily ancient temperature resetting response can be used in homeothermic animals to enhance internal circadian synchronization.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3625727/" 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/PMC3625727/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Buhr, Ethan D -- Yoo, Seung-Hee -- Takahashi, Joseph S -- P50 MH074924/MH/NIMH NIH HHS/ -- P50 MH074924-01/MH/NIMH NIH HHS/ -- P50 MH074924-02/MH/NIMH NIH HHS/ -- P50 MH074924-03/MH/NIMH NIH HHS/ -- P50 MH074924-04/MH/NIMH NIH HHS/ -- P50 MH074924-05/MH/NIMH NIH HHS/ -- T32 AG 20418/AG/NIA NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2010 Oct 15;330(6002):379-85. doi: 10.1126/science.1195262.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurobiology and Physiology, Northwestern University, Evanston, IL 60208-3520, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20947768" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Arginine Vasopressin/metabolism ; Benzhydryl Compounds/pharmacology ; Biological Clocks/*physiology ; *Body Temperature ; Body Temperature Regulation ; Calcium Channels, L-Type/physiology ; Cell Communication ; Circadian Rhythm/*physiology ; Cues ; DNA-Binding Proteins/metabolism ; Heat-Shock Response ; Lung/physiology ; Mice ; Pituitary Gland/physiology ; Pyrrolidinones/pharmacology ; Signal Transduction ; Suprachiasmatic Nucleus/cytology/*physiology ; Temperature ; Tissue Culture Techniques ; Transcription Factors/metabolism ; Transcription, Genetic/drug effects ; Vasoactive Intestinal Peptide/metabolism
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    Genetic evidence for high-altitude adaptation in Tibet (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-05-15
    Description: Tibetans have lived at very high altitudes for thousands of years, and they have a distinctive suite of physiological traits that enable them to tolerate environmental hypoxia. These phenotypes are clearly the result of adaptation to this environment, but their genetic basis remains unknown. We report genome-wide scans that reveal positive selection in several regions that contain genes whose products are likely involved in high-altitude adaptation. Positively selected haplotypes of EGLN1 and PPARA were significantly associated with the decreased hemoglobin phenotype that is unique to this highland population. Identification of these genes provides support for previously hypothesized mechanisms of high-altitude adaptation and illuminates the complexity of hypoxia-response pathways in humans.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Simonson, Tatum S -- Yang, Yingzhong -- Huff, Chad D -- Yun, Haixia -- Qin, Ga -- Witherspoon, David J -- Bai, Zhenzhong -- Lorenzo, Felipe R -- Xing, Jinchuan -- Jorde, Lynn B -- Prchal, Josef T -- Ge, RiLi -- 1P01CA108671-01A2/CA/NCI NIH HHS/ -- DK069513/DK/NIDDK NIH HHS/ -- GM059290/GM/NIGMS NIH HHS/ -- HL50077/HL/NHLBI NIH HHS/ -- R00 HG005846/HG/NHGRI NIH HHS/ -- New York, N.Y. -- Science. 2010 Jul 2;329(5987):72-5. doi: 10.1126/science.1189406. Epub 2010 May 13.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Eccles Institute of Human Genetics, University of Utah School of Medicine, Salt Lake City, UT 84112, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20466884" target="_blank"〉PubMed〈/a〉
    Keywords: *Acclimatization ; *Altitude ; Asian Continental Ancestry Group/genetics ; Ethnic Groups/genetics ; Female ; Genetic Association Studies ; Genetic Variation ; Genome, Human ; Haplotypes ; Hemoglobins/*analysis ; Humans ; Hypoxia-Inducible Factor 1/metabolism ; Hypoxia-Inducible Factor-Proline Dioxygenases ; Linear Models ; Male ; *Oxygen ; PPAR alpha/*genetics ; Phenotype ; Polymorphism, Single Nucleotide ; Procollagen-Proline Dioxygenase/*genetics ; *Selection, Genetic ; Signal Transduction ; Tibet
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    Signaling kinase AMPK activates stress-promoted transcription via histone H2B phosphorylation (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-07-22
    Description: The mammalian adenosine monophosphate-activated protein kinase (AMPK) is a serine-threonine kinase protein complex that is a central regulator of cellular energy homeostasis. However, the mechanisms by which AMPK mediates cellular responses to metabolic stress remain unclear. We found that AMPK activates transcription through direct association with chromatin and phosphorylation of histone H2B at serine 36. AMPK recruitment and H2B Ser36 phosphorylation colocalized within genes activated by AMPK-dependent pathways, both in promoters and in transcribed regions. Ectopic expression of H2B in which Ser36 was substituted by alanine reduced transcription and RNA polymerase II association to AMPK-dependent genes, and lowered cell survival in response to stress. Our results place AMPK-dependent H2B Ser36 phosphorylation in a direct transcriptional and chromatin regulatory pathway leading to cellular adaptation to stress.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3922052/" 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/PMC3922052/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bungard, David -- Fuerth, Benjamin J -- Zeng, Ping-Yao -- Faubert, Brandon -- Maas, Nancy L -- Viollet, Benoit -- Carling, David -- Thompson, Craig B -- Jones, Russell G -- Berger, Shelley L -- CA078831/CA/NCI NIH HHS/ -- CA09171/CA/NCI NIH HHS/ -- CA105463/CA/NCI NIH HHS/ -- MC_U120027537/Medical Research Council/United Kingdom -- MOP-93799/Canadian Institutes of Health Research/Canada -- P01 AG031862/AG/NIA NIH HHS/ -- P01 CA104838/CA/NCI NIH HHS/ -- R01 CA078831/CA/NCI NIH HHS/ -- R01 CA105463/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 2010 Sep 3;329(5996):1201-5. doi: 10.1126/science.1191241. Epub 2010 Jul 15.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cellular and Developmental Biology, University of Pennsylvania Medical School, Philadelphia, PA 19104, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20647423" target="_blank"〉PubMed〈/a〉
    Keywords: AMP-Activated Protein Kinases/chemistry/*metabolism ; Adaptation, Physiological ; Amino Acid Motifs ; Amino Acid Substitution ; Animals ; Cell Line ; Cell Line, Tumor ; Cell Survival ; Cells, Cultured ; Chromatin/*metabolism ; Chromatin Immunoprecipitation ; Enzyme Activation ; Gene Expression Regulation ; Histones/chemistry/*metabolism ; Humans ; Mice ; Phosphorylation ; Promoter Regions, Genetic ; Protein-Serine-Threonine Kinases/genetics/metabolism ; Serine/metabolism ; Signal Transduction ; *Stress, Physiological ; *Transcription, Genetic ; Tumor Suppressor Protein p53/metabolism
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    Photorhabdus luminescens toxins ADP-ribosylate actin and RhoA to force actin clustering (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-02-27
    Description: The bacterium Photorhabdus luminescens is mutualistically associated with entomopathogenetic nematodes. These nematodes invade insect larvae and release the bacteria from their intestine, which kills the insects through the action of toxin complexes. We elucidated the mode of action of two of these insecticidal toxins from P. luminescens. We identified the biologically active components TccC3 and TccC5 as adenosine diphosphate (ADP)-ribosyltransferases, which modify unusual amino acids. TccC3 ADP-ribosylated threonine-148 of actin, resulting in actin polymerization. TccC5 ADP-ribosylated Rho guanosine triphosphatase proteins at glutamine-61 and glutamine-63, inducing their activation. The concerted action of both toxins inhibited phagocytosis of target insect cells and induced extensive intracellular polymerization and clustering of actin. Several human pathogenic bacteria produce related toxins.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lang, Alexander E -- Schmidt, Gudula -- Schlosser, Andreas -- Hey, Timothy D -- Larrinua, Ignacio M -- Sheets, Joel J -- Mannherz, Hans G -- Aktories, Klaus -- New York, N.Y. -- Science. 2010 Feb 26;327(5969):1139-42. doi: 10.1126/science.1184557.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institut fur Experimentelle und Klinische Pharmakologie und Toxikologie, Albert-Ludwigs-Universitat Freiburg, 79104 Freiburg, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20185726" target="_blank"〉PubMed〈/a〉
    Keywords: ADP Ribose Transferases/chemistry/*metabolism ; Actins/chemistry/*metabolism ; Adenosine Diphosphate Ribose/*metabolism ; Animals ; Bacterial Toxins/chemistry/*metabolism/pharmacology ; Cell Line ; Glutamine/metabolism ; HeLa Cells ; Hemocytes/immunology ; Humans ; Moths ; Phagocytosis/drug effects ; *Photorhabdus ; Signal Transduction ; Stress Fibers/metabolism ; Threonine/metabolism ; Thymosin/metabolism/pharmacology ; rhoA GTP-Binding Protein/*metabolism
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    Immunology. A guardian of T cell fate (2010)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2010-07-03
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Di Santo, James P -- R01 AR060723/AR/NIAMS NIH HHS/ -- New York, N.Y. -- Science. 2010 Jul 2;329(5987):44-5. doi: 10.1126/science.1191664.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Innate Immunity Unit, Institut Pasteur, Paris F-75724, France. james.di-santo@pasteur.fr〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20595605" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Lineage ; Cells, Cultured ; Cytokines/metabolism ; Gene Deletion ; Gene Expression Regulation ; Interleukin-7/physiology ; Killer Cells, Natural/cytology/immunology/*physiology ; *Lymphopoiesis/genetics ; Mice ; Models, Biological ; Precursor Cells, T-Lymphoid/cytology/physiology ; Repressor Proteins/*genetics/*metabolism ; Signal Transduction ; T-Lymphocytes/cytology/immunology/*physiology ; Tumor Suppressor Proteins/*genetics/*metabolism
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    Autophagy and metabolism (2010)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2010-12-04
    Description: Autophagy is a process of self-cannibalization. Cells capture their own cytoplasm and organelles and consume them in lysosomes. The resulting breakdown products are inputs to cellular metabolism, through which they are used to generate energy and to build new proteins and membranes. Autophagy preserves the health of cells and tissues by replacing outdated and damaged cellular components with fresh ones. In starvation, it provides an internal source of nutrients for energy generation and, thus, survival. A powerful promoter of metabolic homeostasis at both the cellular and whole-animal level, autophagy prevents degenerative diseases. It does have a downside, however--cancer cells exploit it to survive in nutrient-poor tumors.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3010857/" 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/PMC3010857/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rabinowitz, Joshua D -- White, Eileen -- R01 CA130893/CA/NCI NIH HHS/ -- R01 CA130893-03/CA/NCI NIH HHS/ -- R37 CA053370/CA/NCI NIH HHS/ -- R37 CA053370-19/CA/NCI NIH HHS/ -- RC1 CA147961/CA/NCI NIH HHS/ -- RC1 CA147961-02/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 2010 Dec 3;330(6009):1344-8. doi: 10.1126/science.1193497.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry and Lewis-Sigler Institute for Integrative Genomics, 241 Carl Icahn Laboratory, Washington Road, Princeton University, Princeton, NJ 08544, USA. joshr@genomics.princeton.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21127245" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Autophagy ; Cell Survival ; Disease ; Energy Metabolism ; Homeostasis ; Humans ; *Metabolism ; Neoplasms/metabolism/pathology ; Phagosomes/metabolism ; Proteins/metabolism ; Signal Transduction ; Starvation ; TOR Serine-Threonine Kinases/metabolism
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    Regulation of oligodendrocyte differentiation and myelination (2010)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2010-11-06
    Description: Despite the importance of myelin for the rapid conduction of action potentials, the molecular bases of oligodendrocyte differentiation and central nervous system (CNS) myelination are still incompletely understood. Recent results have greatly advanced this understanding, identifying new transcriptional regulators of myelin gene expression, elucidating vital roles for microRNAs in controlling myelination, and clarifying the extracellular signaling mechanisms that orchestrate the development of myelin. Studies have also demonstrated an unexpected level of plasticity of myelin in the adult CNS. These recent advances provide new insight into how remyelination may be stimulated in demyelinating disorders such as multiple sclerosis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Emery, Ben -- New York, N.Y. -- Science. 2010 Nov 5;330(6005):779-82. doi: 10.1126/science.1190927.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Centre for Neuroscience and Florey Neuroscience Institutes, Level 2, Alan Gilbert Building, The University of Melbourne, 161 Barry Street, Carlton South, Victoria 3053, Australia. emeryb@unimelb.edu.au〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21051629" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Axons/physiology ; Cell Differentiation ; Central Nervous System/cytology/*physiology ; Chromatin Assembly and Disassembly ; Demyelinating Diseases/physiopathology/therapy ; Gene Expression Regulation ; Humans ; MicroRNAs/metabolism ; Myelin Sheath/*physiology ; Oligodendroglia/*cytology/*physiology ; Signal Transduction ; Transcription, Genetic
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    Siah regulation of Pard3A controls neuronal cell adhesion during germinal zone exit (2010)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2010-11-27
    Description: The brain's circuitry is established by directed migration and synaptogenesis of neurons during development. Although neurons mature and migrate in specific patterns, little is known about how neurons exit their germinal zone niche. We found that cerebellar granule neuron germinal zone exit is regulated by proteasomal degradation of Pard3A by the Seven in Absentia homolog (Siah) E3 ubiquitin ligase. Pard3A gain of function and Siah loss of function induce precocious radial migration. Time-lapse imaging using a probe to measure neuronal cell contact reveals that Pard3A promotes adhesive interactions needed for germinal zone exit by recruiting the epithelial tight junction adhesion molecule C to the neuronal cell surface. Our findings define a Siah-Pard3A signaling pathway that controls adhesion-dependent exit of neuronal progenitors or immature neurons from a germinal zone niche.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3065828/" 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/PMC3065828/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Famulski, Jakub K -- Trivedi, Niraj -- Howell, Danielle -- Yang, Yuan -- Tong, Yiai -- Gilbertson, Richard -- Solecki, David J -- P01 CA096832/CA/NCI NIH HHS/ -- P01 CA096832-07/CA/NCI NIH HHS/ -- P30 CA021765/CA/NCI NIH HHS/ -- P30 CA021765-33/CA/NCI NIH HHS/ -- R01 CA129541/CA/NCI NIH HHS/ -- R01 CA129541-04/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 2010 Dec 24;330(6012):1834-8. doi: 10.1126/science.1198480. Epub 2010 Nov 25.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Developmental Neurobiology, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21109632" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Cell Adhesion ; Cell Adhesion Molecules/chemistry/*metabolism ; Cell Line ; *Cell Movement ; Cell Polarity ; Cerebellum/*cytology/embryology/*metabolism ; Dogs ; Humans ; Immunoglobulins/chemistry/metabolism ; Mice ; Morphogenesis ; Neurons/cytology/*physiology ; Protein Binding ; Protein Interaction Domains and Motifs ; Protein Structure, Tertiary ; RNA Interference ; Signal Transduction ; Stem Cells/physiology ; Transfection ; Ubiquitin-Protein Ligases/genetics/*metabolism ; Ubiquitination
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    Self-assembly of filopodia-like structures on supported lipid bilayers (2010)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2010-09-11
    Description: Filopodia are finger-like protrusive structures, containing actin bundles. By incubating frog egg extracts with supported lipid bilayers containing phosphatidylinositol 4,5 bisphosphate, we have reconstituted the assembly of filopodia-like structures (FLSs). The actin assembles into parallel bundles, and known filopodial components localize to the tip and shaft. The filopodia tip complexes self-organize--they are not templated by preexisting membrane microdomains. The F-BAR domain protein toca-1 recruits N-WASP, followed by the Arp2/3 complex and actin. Elongation proteins, Diaphanous-related formin, VASP, and fascin are recruited subsequently. Although the Arp2/3 complex is required for FLS initiation, it is not essential for elongation, which involves formins. We propose that filopodia form via clustering of Arp2/3 complex activators, self-assembly of filopodial tip complexes on the membrane, and outgrowth of actin bundles.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2982780/" 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/PMC2982780/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lee, Kwonmoo -- Gallop, Jennifer L -- Rambani, Komal -- Kirschner, Marc W -- GM26875/GM/NIGMS NIH HHS/ -- R01 GM026875/GM/NIGMS NIH HHS/ -- R01 GM026875-34/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2010 Sep 10;329(5997):1341-5. doi: 10.1126/science.1191710.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Systems Biology, Harvard Medical School, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20829485" target="_blank"〉PubMed〈/a〉
    Keywords: Actin Cytoskeleton/ultrastructure ; Actin-Related Protein 2-3 Complex/metabolism ; Actins/*metabolism ; Animals ; Carrier Proteins/metabolism ; Cell Adhesion Molecules/metabolism ; Cell Membrane/metabolism ; Humans ; Kinetics ; *Lipid Bilayers ; Membrane Microdomains ; Mice ; Microfilament Proteins/metabolism ; Microtubule-Associated Proteins/metabolism ; NADPH Dehydrogenase/metabolism ; Phosphatidylinositol Phosphates/metabolism ; Phosphoproteins/metabolism ; Pseudopodia/*metabolism/*ultrastructure ; Recombinant Fusion Proteins/metabolism ; Signal Transduction ; Wiskott-Aldrich Syndrome Protein, Neuronal/metabolism ; Xenopus ; Xenopus Proteins/metabolism
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    Phosphatidic acid is a pH biosensor that links membrane biogenesis to metabolism (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-08-28
    Description: Recognition of lipids by proteins is important for their targeting and activation in many signaling pathways, but the mechanisms that regulate such interactions are largely unknown. Here, we found that binding of proteins to the ubiquitous signaling lipid phosphatidic acid (PA) depended on intracellular pH and the protonation state of its phosphate headgroup. In yeast, a rapid decrease in intracellular pH in response to glucose starvation regulated binding of PA to a transcription factor, Opi1, that coordinately repressed phospholipid metabolic genes. This enabled coupling of membrane biogenesis to nutrient availability.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Young, Barry P -- Shin, John J H -- Orij, Rick -- Chao, Jesse T -- Li, Shu Chen -- Guan, Xue Li -- Khong, Anthony -- Jan, Eric -- Wenk, Markus R -- Prinz, William A -- Smits, Gertien J -- Loewen, Christopher J R -- Canadian Institutes of Health Research/Canada -- Intramural NIH HHS/ -- New York, N.Y. -- Science. 2010 Aug 27;329(5995):1085-8. doi: 10.1126/science.1191026.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cellular and Physiological Sciences, University of British Columbia, Vancouver, British Columbia, V6T 1Z3, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20798321" target="_blank"〉PubMed〈/a〉
    Keywords: Active Transport, Cell Nucleus ; Cation Transport Proteins/genetics/metabolism ; Cell Membrane/*metabolism ; Cell Nucleus/metabolism ; Endoplasmic Reticulum/metabolism ; Gene Expression Regulation, Fungal ; Genes, Fungal ; Glucose/metabolism ; Hydrogen-Ion Concentration ; Inositol/genetics/metabolism ; Liposomes/metabolism ; Mutation ; Phosphatidic Acids/*metabolism ; Protein Binding ; Protein Phosphatase 1/genetics/metabolism ; Proton-Translocating ATPases/genetics/metabolism ; Recombinant Fusion Proteins/metabolism ; Repressor Proteins/genetics/*metabolism ; Saccharomyces cerevisiae/genetics/growth & development/*metabolism ; Saccharomyces cerevisiae Proteins/genetics/*metabolism ; Signal Transduction ; Transcription, Genetic ; Vacuolar Proton-Translocating ATPases/genetics/metabolism
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    Oscillating gene expression determines competence for periodic Arabidopsis root branching (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-09-11
    Description: Plants and animals produce modular developmental units in a periodic fashion. In plants, lateral roots form as repeating units along the root primary axis; however, the developmental mechanism regulating this process is unknown. We found that cyclic expression pulses of a reporter gene mark the position of future lateral roots by establishing prebranch sites and that prebranch site production and root bending are periodic. Microarray and promoter-luciferase studies revealed two sets of genes oscillating in opposite phases at the root tip. Genetic studies show that some oscillating transcriptional regulators are required for periodicity in one or both developmental processes. This molecular mechanism has characteristics that resemble molecular clock-driven activities in animal species.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2976612/" 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/PMC2976612/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Moreno-Risueno, Miguel A -- Van Norman, Jaimie M -- Moreno, Antonio -- Zhang, Jingyuan -- Ahnert, Sebastian E -- Benfey, Philip N -- R01 GM043778/GM/NIGMS NIH HHS/ -- R01 GM043778-19/GM/NIGMS NIH HHS/ -- R01 GM043778-20/GM/NIGMS NIH HHS/ -- R01 GM043778-21/GM/NIGMS NIH HHS/ -- R01-GM043778/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2010 Sep 10;329(5997):1306-11. doi: 10.1126/science.1191937.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology and Institute for Genome Sciences and Policy Center for Systems Biology, Duke University, Durham, NC 27708, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20829477" target="_blank"〉PubMed〈/a〉
    Keywords: Arabidopsis/cytology/*genetics/*growth & development/metabolism ; Arabidopsis Proteins/genetics/metabolism ; Gene Expression Profiling ; *Gene Expression Regulation, Plant ; Gene Regulatory Networks ; Genes, Plant ; Genes, Reporter ; Gravitation ; Indoleacetic Acids/metabolism/pharmacology ; Meristem/*genetics/*growth & development/metabolism ; Oligonucleotide Array Sequence Analysis ; Phthalimides/pharmacology ; Plant Roots/cytology/genetics/*growth & development ; Promoter Regions, Genetic ; Signal Transduction ; Temperature ; Time Factors ; Transcription Factors/genetics/metabolism ; Transcription, Genetic
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    Regulation of adaptive immunity by the innate immune system (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-01-16
    Description: Twenty years after the proposal that pattern recognition receptors detect invasion by microbial pathogens, the field of immunology has witnessed several discoveries that have elucidated receptors and signaling pathways of microbial recognition systems and how they control the generation of T and B lymphocyte-mediated immune responses. However, there are still many fundamental questions that remain poorly understood, even though sometimes the answers are assumed to be known. Here, we discuss some of these questions, including the mechanisms by which pathogen-specific innate immune recognition activates antigen-specific adaptive immune responses and the roles of different types of innate immune recognition in host defense from infection and injury.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3645875/" 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/PMC3645875/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Iwasaki, Akiko -- Medzhitov, Ruslan -- R01 AI054359/AI/NIAID NIH HHS/ -- R01 AI055502/AI/NIAID NIH HHS/ -- R01 AI062428/AI/NIAID NIH HHS/ -- R01 AI064705/AI/NIAID NIH HHS/ -- R01 AI081884/AI/NIAID NIH HHS/ -- R01AI054359/AI/NIAID NIH HHS/ -- R01AI055502/AI/NIAID NIH HHS/ -- R01AI064705/AI/NIAID NIH HHS/ -- R01DK071754/DK/NIDDK NIH HHS/ -- R21AI083242/AI/NIAID NIH HHS/ -- R37AI046688/AI/NIAID NIH HHS/ -- U54 AI057160/AI/NIAID NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2010 Jan 15;327(5963):291-5. doi: 10.1126/science.1183021.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Immunobiology, School of Medicine, Yale University, New Haven, CT 06520, USA. akiko.iwasaki@yale.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20075244" target="_blank"〉PubMed〈/a〉
    Keywords: *Adaptive Immunity ; Animals ; Antigen-Presenting Cells/immunology ; Bacterial Infections/*immunology ; Humans ; *Immunity, Innate ; Ligands ; Receptors, Pattern Recognition/immunology/*metabolism ; Signal Transduction ; Toll-Like Receptors/immunology/metabolism ; Virus Diseases/*immunology
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    Conformational spread as a mechanism for cooperativity in the bacterial flagellar switch (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-02-06
    Description: The bacterial flagellar switch that controls the direction of flagellar rotation during chemotaxis has a highly cooperative response. This has previously been understood in terms of the classic two-state, concerted model of allosteric regulation. Here, we used high-resolution optical microscopy to observe switching of single motors and uncover the stochastic multistate nature of the switch. Our observations are in detailed quantitative agreement with a recent general model of allosteric cooperativity that exhibits conformational spread--the stochastic growth and shrinkage of domains of adjacent subunits sharing a particular conformational state. We expect that conformational spread will be important in explaining cooperativity in other large signaling complexes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bai, Fan -- Branch, Richard W -- Nicolau, Dan V Jr -- Pilizota, Teuta -- Steel, Bradley C -- Maini, Philip K -- Berry, Richard M -- BB/E00458X/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- BB/H01991X/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- New York, N.Y. -- Science. 2010 Feb 5;327(5966):685-9. doi: 10.1126/science.1182105.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Clarendon Laboratory, Department of Physics, University of Oxford, Parks Road, Oxford OX1 3PU, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20133571" target="_blank"〉PubMed〈/a〉
    Keywords: Allosteric Regulation ; Bacterial Proteins/chemistry/metabolism ; Binding Sites ; Escherichia coli/metabolism ; Escherichia coli Proteins/*chemistry/*metabolism ; Flagella/*chemistry ; Membrane Proteins/chemistry/metabolism ; Models, Biological ; Models, Molecular ; Molecular Motor Proteins/*chemistry/*metabolism ; Monte Carlo Method ; Protein Binding ; Protein Conformation ; Protein Subunits/*chemistry/*metabolism ; Signal Transduction ; Thermodynamics
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    Lynx1, a cholinergic brake, limits plasticity in adult visual cortex (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-11-13
    Description: Experience-dependent brain plasticity typically declines after an early critical period during which circuits are established. Loss of plasticity with closure of the critical period limits improvement of function in adulthood, but the mechanisms that change the brain's plasticity remain poorly understood. Here, we identified an increase in expression of Lynx1 protein in mice that prevented plasticity in the primary visual cortex late in life. Removal of this molecular brake enhanced nicotinic acetylcholine receptor signaling. Lynx1 expression thus maintains stability of mature cortical networks in the presence of cholinergic innervation. The results suggest that modulating the balance between excitatory and inhibitory circuits reactivates visual plasticity and may present a therapeutic target.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3387538/" 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/PMC3387538/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Morishita, Hirofumi -- Miwa, Julie M -- Heintz, Nathaniel -- Hensch, Takao K -- 1 DP1 OD003699-01/OD/NIH HHS/ -- DA-17279/DA/NIDA NIH HHS/ -- DP1 OD003699/OD/NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2010 Nov 26;330(6008):1238-40. doi: 10.1126/science.1195320. Epub 2010 Nov 11.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉FM Kirby Neurobiology Center, Children's Hospital Boston, Harvard Medical School, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21071629" target="_blank"〉PubMed〈/a〉
    Keywords: Aging ; Amblyopia/metabolism ; Animals ; Cholinesterase Inhibitors/pharmacology ; Dominance, Ocular ; Evoked Potentials, Visual ; Mecamylamine/pharmacology ; Membrane Glycoproteins/*genetics/metabolism/*physiology ; Mice ; Mice, Inbred C57BL ; Mice, Knockout ; Neural Inhibition ; *Neuronal Plasticity ; Neuropeptides/*genetics/metabolism/*physiology ; Nicotinic Antagonists/pharmacology ; Physostigmine/pharmacology ; Receptors, Nicotinic/genetics/*metabolism ; Sensory Deprivation ; Signal Transduction ; *Vision, Ocular ; Visual Cortex/*physiology ; Visual Pathways
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    The genetic landscape of the childhood cancer medulloblastoma (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-12-18
    Description: Medulloblastoma (MB) is the most common malignant brain tumor of children. To identify the genetic alterations in this tumor type, we searched for copy number alterations using high-density microarrays and sequenced all known protein-coding genes and microRNA genes using Sanger sequencing in a set of 22 MBs. We found that, on average, each tumor had 11 gene alterations, fewer by a factor of 5 to 10 than in the adult solid tumors that have been sequenced to date. In addition to alterations in the Hedgehog and Wnt pathways, our analysis led to the discovery of genes not previously known to be altered in MBs. Most notably, inactivating mutations of the histone-lysine N-methyltransferase genes MLL2 or MLL3 were identified in 16% of MB patients. These results demonstrate key differences between the genetic landscapes of adult and childhood cancers, highlight dysregulation of developmental pathways as an important mechanism underlying MBs, and identify a role for a specific type of histone methylation in human tumorigenesis.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3110744/" 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/PMC3110744/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Parsons, D Williams -- Li, Meng -- Zhang, Xiaosong -- Jones, Sian -- Leary, Rebecca J -- Lin, Jimmy Cheng-Ho -- Boca, Simina M -- Carter, Hannah -- Samayoa, Josue -- Bettegowda, Chetan -- Gallia, Gary L -- Jallo, George I -- Binder, Zev A -- Nikolsky, Yuri -- Hartigan, James -- Smith, Doug R -- Gerhard, Daniela S -- Fults, Daniel W -- VandenBerg, Scott -- Berger, Mitchel S -- Marie, Suely Kazue Nagahashi -- Shinjo, Sueli Mieko Oba -- Clara, Carlos -- Phillips, Peter C -- Minturn, Jane E -- Biegel, Jaclyn A -- Judkins, Alexander R -- Resnick, Adam C -- Storm, Phillip B -- Curran, Tom -- He, Yiping -- Rasheed, B Ahmed -- Friedman, Henry S -- Keir, Stephen T -- McLendon, Roger -- Northcott, Paul A -- Taylor, Michael D -- Burger, Peter C -- Riggins, Gregory J -- Karchin, Rachel -- Parmigiani, Giovanni -- Bigner, Darell D -- Yan, Hai -- Papadopoulos, Nick -- Vogelstein, Bert -- Kinzler, Kenneth W -- Velculescu, Victor E -- CA057345/CA/NCI NIH HHS/ -- CA096832/CA/NCI NIH HHS/ -- CA118822/CA/NCI NIH HHS/ -- CA121113/CA/NCI NIH HHS/ -- CA135877/CA/NCI NIH HHS/ -- GM074906-01A1/GM/NIGMS NIH HHS/ -- HHSN261200800001E/PHS HHS/ -- P01 CA096832/CA/NCI NIH HHS/ -- P01 CA096832-03/CA/NCI NIH HHS/ -- R01 CA108622/CA/NCI NIH HHS/ -- R01 CA121113/CA/NCI NIH HHS/ -- R01 CA121113-05/CA/NCI NIH HHS/ -- R37 CA057345/CA/NCI NIH HHS/ -- R37 CA057345-20/CA/NCI NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2011 Jan 28;331(6016):435-9. doi: 10.1126/science.1198056. Epub 2010 Dec 16.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Ludwig Center for Cancer Genetics and Therapeutics and Howard Hughes Medical Institute, Johns Hopkins Kimmel Cancer Center, Baltimore, MD 21231, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21163964" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Cerebellar Neoplasms/*genetics/metabolism ; Child ; DNA Copy Number Variations ; DNA-Binding Proteins/genetics/metabolism ; *Genes, Neoplasm ; Genes, Tumor Suppressor ; Histone-Lysine N-Methyltransferase/genetics/metabolism ; Histones/metabolism ; Humans ; Medulloblastoma/*genetics/metabolism ; Methylation ; MicroRNAs/genetics ; *Mutation ; Neoplasm Proteins/genetics/metabolism ; Oligonucleotide Array Sequence Analysis ; Point Mutation ; Sequence Analysis, DNA ; Signal Transduction
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    An early T cell lineage commitment checkpoint dependent on the transcription factor Bcl11b (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-07-03
    Description: The identities of the regulators that mediate commitment of hematopoietic precursors to the T lymphocyte lineage have been unknown. The last stage of T lineage commitment in vivo involves mechanisms to suppress natural killer cell potential, to suppress myeloid and dendritic cell potential, and to silence the stem cell or progenitor cell regulatory functions that initially provide T cell receptor-independent self-renewal capability. The zinc finger transcription factor Bcl11b is T cell-specific in expression among hematopoietic cell types and is first expressed in precursors immediately before T lineage commitment. We found that Bcl11b is necessary for T lineage commitment in mice and is specifically required both to repress natural killer cell-associated genes and to down-regulate a battery of stem cell or progenitor cell genes at the pivotal stage of commitment.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2935300/" 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/PMC2935300/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Li, Long -- Leid, Mark -- Rothenberg, Ellen V -- F06 TW002367/TW/FIC NIH HHS/ -- F06 TW002367-01A1/TW/FIC NIH HHS/ -- R01 GM060852/GM/NIGMS NIH HHS/ -- R01 GM060852-04/GM/NIGMS NIH HHS/ -- R01 GM60852/GM/NIGMS NIH HHS/ -- R33 HL089123/HL/NHLBI NIH HHS/ -- R33 HL089123-03/HL/NHLBI NIH HHS/ -- RC2 CA148278/CA/NCI NIH HHS/ -- RC2 CA148278-02/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 2010 Jul 2;329(5987):89-93. doi: 10.1126/science.1188989.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Biology 156-29, California Institute of Technology, Pasadena, CA 91125, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20595614" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Differentiation ; *Cell Lineage ; Cells, Cultured ; Down-Regulation ; Gene Expression Profiling ; *Gene Expression Regulation, Developmental ; Genes, T-Cell Receptor delta ; Genes, T-Cell Receptor gamma ; Killer Cells, Natural/cytology/physiology ; *Lymphopoiesis/genetics ; Mice ; Mice, Inbred C57BL ; Mice, Knockout ; Precursor Cells, T-Lymphoid/cytology/immunology/*physiology ; Receptors, Antigen, T-Cell, gamma-delta/metabolism ; Receptors, Notch/metabolism ; Repressor Proteins/deficiency/genetics/*metabolism ; Signal Transduction ; T-Lymphocytes/cytology/metabolism/*physiology ; Transcription Factors/genetics/metabolism ; Tumor Suppressor Proteins/deficiency/genetics/*metabolism
    Print ISSN: 0036-8075
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    Reprogramming of T cells to natural killer-like cells upon Bcl11b deletion (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-06-12
    Description: T cells develop in the thymus and are critical for adaptive immunity. Natural killer (NK) lymphocytes constitute an essential component of the innate immune system in tumor surveillance, reproduction, and defense against microbes and viruses. Here, we show that the transcription factor Bcl11b was expressed in all T cell compartments and was indispensable for T lineage development. When Bcl11b was deleted, T cells from all developmental stages acquired NK cell properties and concomitantly lost or decreased T cell-associated gene expression. These induced T-to-natural killer (ITNK) cells, which were morphologically and genetically similar to conventional NK cells, killed tumor cells in vitro, and effectively prevented tumor metastasis in vivo. Therefore, ITNKs may represent a new cell source for cell-based therapies.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3628452/" 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/PMC3628452/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Li, Peng -- Burke, Shannon -- Wang, Juexuan -- Chen, Xiongfeng -- Ortiz, Mariaestela -- Lee, Song-Choon -- Lu, Dong -- Campos, Lia -- Goulding, David -- Ng, Bee Ling -- Dougan, Gordon -- Huntly, Brian -- Gottgens, Bertie -- Jenkins, Nancy A -- Copeland, Neal G -- Colucci, Francesco -- Liu, Pentao -- 076962/Wellcome Trust/United Kingdom -- 077186/Wellcome Trust/United Kingdom -- G0501150/Medical Research Council/United Kingdom -- G0800784/Medical Research Council/United Kingdom -- G116/187/Medical Research Council/United Kingdom -- Biotechnology and Biological Sciences Research Council/United Kingdom -- Wellcome Trust/United Kingdom -- Medical Research Council/United Kingdom -- New York, N.Y. -- Science. 2010 Jul 2;329(5987):85-9. doi: 10.1126/science.1188063. Epub 2010 Jun 10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Wellcome Trust Sanger Institute, Hinxton, Cambridge CB10 1HH, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20538915" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line, Tumor ; *Cell Lineage ; Cells, Cultured ; Coculture Techniques ; Cytotoxicity, Immunologic ; Gene Deletion ; Gene Expression Profiling ; Gene Expression Regulation, Developmental ; Gene Knock-In Techniques ; Genes, T-Cell Receptor beta ; Killer Cells, Natural/cytology/immunology/*physiology ; *Lymphopoiesis/genetics ; Melanoma, Experimental/immunology/therapy ; Mice ; Mice, Inbred C57BL ; Mice, Knockout ; Oligonucleotide Array Sequence Analysis ; Precursor Cells, T-Lymphoid/cytology/physiology ; Receptors, Antigen, T-Cell, alpha-beta/metabolism ; Repressor Proteins/*genetics/*metabolism ; Signal Transduction ; Stromal Cells/cytology/physiology ; T-Lymphocytes/cytology/immunology/*physiology/transplantation ; Tamoxifen/analogs & derivatives/pharmacology ; Tumor Suppressor Proteins/*genetics/*metabolism
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    Genetics. The DNA damage road map (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-12-04
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Friedman, Nir -- Schuldiner, Maya -- New York, N.Y. -- Science. 2010 Dec 3;330(6009):1327-8. doi: 10.1126/science.1199862.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉School of Computer Science and Engineering, The Hebrew University of Jerusalem, Jerusalem, Israel. nir@cs.huji.ac.il〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21127235" target="_blank"〉PubMed〈/a〉
    Keywords: *DNA Damage ; DNA Repair/*genetics ; *Epistasis, Genetic ; *Gene Regulatory Networks ; Genes, Fungal ; Methyl Methanesulfonate/pharmacology ; Mutagens/pharmacology ; Mutation ; Protein Interaction Mapping ; Saccharomyces cerevisiae/*genetics/metabolism ; Saccharomyces cerevisiae Proteins/*metabolism ; Signal Transduction ; Transcription Factors/metabolism
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Circadian integration of metabolism and energetics (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-12-04
    Description: Circadian clocks align behavioral and biochemical processes with the day/night cycle. Nearly all vertebrate cells possess self-sustained clocks that couple endogenous rhythms with changes in cellular environment. Genetic disruption of clock genes in mice perturbs metabolic functions of specific tissues at distinct phases of the sleep/wake cycle. Circadian desynchrony, a characteristic of shift work and sleep disruption in humans, also leads to metabolic pathologies. Here, we review advances in understanding the interrelationship among circadian disruption, sleep deprivation, obesity, and diabetes and implications for rational therapeutics for these conditions.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3756146/" 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/PMC3756146/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bass, Joseph -- Takahashi, Joseph S -- P01 AG011412/AG/NIA NIH HHS/ -- P50 MH074924/MH/NIMH NIH HHS/ -- R01 HL097817/HL/NHLBI NIH HHS/ -- R01 MH078024/MH/NIMH NIH HHS/ -- R01HL097817/HL/NHLBI NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2010 Dec 3;330(6009):1349-54. doi: 10.1126/science.1195027.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, Northwestern University, Feinberg School of Medicine, Chicago, IL 60611, USA. j-bass@northwestern.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21127246" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Circadian Clocks/genetics/physiology ; Diabetes Mellitus/metabolism/physiopathology ; *Energy Metabolism ; Feedback, Physiological ; Gene Expression Regulation ; Gene Regulatory Networks ; Homeostasis ; Humans ; Metabolic Networks and Pathways ; *Metabolism ; Obesity/metabolism/physiopathology ; Protein Biosynthesis ; Signal Transduction ; Sleep Deprivation/metabolism/physiopathology ; Sleep Disorders, Circadian Rhythm/metabolism ; Transcription, Genetic
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Dietary restriction: standing up for sirtuins (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-08-28
    Description: 〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3985480/" 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/PMC3985480/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Baur, Joseph A -- Chen, Danica -- Chini, Eduardo N -- Chua, Katrin -- Cohen, Haim Y -- de Cabo, Rafael -- Deng, Chuxia -- Dimmeler, Stefanie -- Gius, David -- Guarente, Leonard P -- Helfand, Stephen L -- Imai, Shin-Ichiro -- Itoh, Hiroshi -- Kadowaki, Takashi -- Koya, Daisuke -- Leeuwenburgh, Christiaan -- McBurney, Michael -- Nabeshima, Yo-Ichi -- Neri, Christian -- Oberdoerffer, Philipp -- Pestell, Richard G -- Rogina, Blanka -- Sadoshima, Junichi -- Sartorelli, Vittorio -- Serrano, Manuel -- Sinclair, David A -- Steegborn, Clemens -- Tatar, Marc -- Tissenbaum, Heidi A -- Tong, Qiang -- Tsubota, Kazuo -- Vaquero, Alejandro -- Verdin, Eric -- P01 AG027916/AG/NIA NIH HHS/ -- R00 AG031182/AG/NIA NIH HHS/ -- R01 AG019719/AG/NIA NIH HHS/ -- R01 AG023039/AG/NIA NIH HHS/ -- R01 AG023088/AG/NIA NIH HHS/ -- R01 AG023088-08/AG/NIA NIH HHS/ -- R01 AG024360/AG/NIA NIH HHS/ -- R01 AG028730/AG/NIA NIH HHS/ -- R01 AG028730-05/AG/NIA NIH HHS/ -- R01 HL067724/HL/NHLBI NIH HHS/ -- R01 HL091469/HL/NHLBI NIH HHS/ -- R01 HL102738/HL/NHLBI NIH HHS/ -- R37 AG024360/AG/NIA NIH HHS/ -- Z99 DK999999/Intramural NIH HHS/ -- New York, N.Y. -- Science. 2010 Aug 27;329(5995):1012-3; author reply 1013-4. doi: 10.1126/science.329.5995.1012.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20798296" target="_blank"〉PubMed〈/a〉
    Keywords: Aging/*physiology ; Animals ; *Caloric Restriction ; Humans ; *Longevity ; Signal Transduction ; Sirtuins/*physiology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Lipid rafts as a membrane-organizing principle (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-01-02
    Description: Cell membranes display a tremendous complexity of lipids and proteins designed to perform the functions cells require. To coordinate these functions, the membrane is able to laterally segregate its constituents. This capability is based on dynamic liquid-liquid immiscibility and underlies the raft concept of membrane subcompartmentalization. Lipid rafts are fluctuating nanoscale assemblies of sphingolipid, cholesterol, and proteins that can be stabilized to coalesce, forming platforms that function in membrane signaling and trafficking. Here we review the evidence for how this principle combines the potential for sphingolipid-cholesterol self-assembly with protein specificity to selectively focus membrane bioactivity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lingwood, Daniel -- Simons, Kai -- New York, N.Y. -- Science. 2010 Jan 1;327(5961):46-50. doi: 10.1126/science.1174621.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Max Planck Institute for Molecular Cell Biology and Genetics, Pfotenhauerstrasse 108, 01307 Dresden, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20044567" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Evolution ; Cell Membrane/chemistry/*physiology/ultrastructure ; Cholesterol/chemistry/metabolism ; Humans ; Lipid Bilayers/chemistry/metabolism ; Membrane Microdomains/*chemistry/*physiology/ultrastructure ; Membrane Proteins/chemistry/metabolism ; Models, Biological ; Signal Transduction ; Sphingolipids/chemistry/metabolism
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Granulosa cell ligand NPPC and its receptor NPR2 maintain meiotic arrest in mouse oocytes (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-10-16
    Description: Granulosa cells of mammalian Graafian follicles maintain oocytes in meiotic arrest, which prevents their precocious maturation. We show that mouse mural granulosa cells, which line the follicle wall, express natriuretic peptide precursor type C (Nppc) messenger RNA (mRNA), whereas cumulus cells surrounding oocytes express mRNA of the NPPC receptor NPR2, a guanylyl cyclase. NPPC increased cGMP levels in cumulus cells and oocytes and inhibited meiotic resumption in vitro. Meiotic arrest was not sustained in most Graafian follicles of Nppc or Npr2 mutant mice, and meiosis resumed precociously. Oocyte-derived paracrine factors promoted cumulus cell expression of Npr2 mRNA. Therefore, the granulosa cell ligand NPPC and its receptor NPR2 in cumulus cells prevent precocious meiotic maturation, which is critical for maturation and ovulation synchrony and for normal female fertility.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3056542/" 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/PMC3056542/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zhang, Meijia -- Su, You-Qiang -- Sugiura, Koji -- Xia, Guoliang -- Eppig, John J -- HD21970/HD/NICHD NIH HHS/ -- HD23839/HD/NICHD NIH HHS/ -- R01 HD023839/HD/NICHD NIH HHS/ -- R01 HD023839-22/HD/NICHD NIH HHS/ -- R37 HD021970/HD/NICHD NIH HHS/ -- R37 HD021970-25/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 2010 Oct 15;330(6002):366-9. doi: 10.1126/science.1193573.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, People's Republic of China.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20947764" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cumulus Cells/*metabolism ; Cyclic AMP/metabolism ; Cyclic GMP/metabolism ; Female ; Granulosa Cells/*metabolism ; Intercellular Signaling Peptides and Proteins/metabolism ; Ligands ; *Meiosis ; Mice ; Models, Biological ; Mutation ; Natriuretic Peptide, C-Type/genetics/*metabolism ; Oocytes/*physiology ; Ovarian Follicle/cytology ; Protein Precursors/genetics/*metabolism ; RNA, Messenger/genetics/metabolism ; Receptors, Atrial Natriuretic Factor/genetics/*metabolism ; Signal Transduction
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    Specification and morphogenesis of astrocytes (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-11-06
    Description: Astrocytes are the most abundant cell type in the mammalian brain. Interest in astrocyte function has increased dramatically in recent years because of their newly discovered roles in synapse formation, maturation, efficacy, and plasticity. However, our understanding of astrocyte development has lagged behind that of other brain cell types. We do not know the molecular mechanism by which astrocytes are specified, how they grow to assume their complex morphologies, and how they interact with and sculpt developing neuronal circuits. Recent work has provided a basic understanding of how intrinsic and extrinsic mechanisms govern the production of astrocytes from precursor cells and the generation of astrocyte diversity. Moreover, new studies of astrocyte morphology have revealed that mature astrocytes are extraordinarily complex, interact with many thousands of synapses, and tile with other astrocytes to occupy unique spatial domains in the brain. A major challenge for the field is to understand how astrocytes talk to each other, and to neurons, during development to establish appropriate astrocytic and neuronal network architectures.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Freeman, Marc R -- NS053538/NS/NINDS NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2010 Nov 5;330(6005):774-8. doi: 10.1126/science.1190928.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurobiology, Howard Hughes Medical Institute, University of Massachusetts Medical School, Worcester, MA 01605, USA. marc.freeman@umassmed.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21051628" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Astrocytes/*cytology/*physiology ; Brain/*cytology/embryology/growth & development ; Cell Lineage ; Epigenesis, Genetic ; Humans ; *Morphogenesis ; Neural Stem Cells/cytology/*physiology ; Neurons/cytology/physiology ; Signal Transduction ; Spinal Cord/cytology/embryology/growth & development ; Synapses/physiology
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    New approaches in immunotherapy (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-01-16
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Thomas, Paul G -- Doherty, Peter C -- New York, N.Y. -- Science. 2010 Jan 15;327(5963):249. doi: 10.1126/science.1186704.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20075216" target="_blank"〉PubMed〈/a〉
    Keywords: Humans ; *Immunity, Innate ; Immunotherapy ; Inflammation ; Receptors, Pattern Recognition/*physiology ; Signal Transduction ; Toll-Like Receptors/physiology
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    Bifurcation of Toll-like receptor 9 signaling by adaptor protein 3 (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-09-18
    Description: Endosomal Toll-like receptors (TLRs) 7 and 9 recognize viral pathogens and induce signals leading to the activation of nuclear factor kappaB (NF-kappaB)-dependent proinflammatory cytokines and interferon regulatory factor 7 (IRF7)-dependent type I interferons (IFNs). Recognition of viral nucleic acids by TLR9 requires its cleavage in the endolysosomal compartment. Here, we show that TLR9 signals leading to the activation of type I IFN, but not proinflammatory cytokine genes, require TLR9 trafficking from endosomes to a specialized lysosome-related organelle. Furthermore, we identify adapter protein-3 as the protein complex responsible for the trafficking of TLR9 to this subcellular compartment. Our results reveal an intracellular mechanism for bifurcation of TLR9 signals by selective receptor trafficking within the endosomal system.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3063333/" 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/PMC3063333/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sasai, Miwa -- Linehan, Melissa M -- Iwasaki, Akiko -- AI054359/AI/NIAID NIH HHS/ -- AI064705/AI/NIAID NIH HHS/ -- AI081884/AI/NIAID NIH HHS/ -- R01 AI054359/AI/NIAID NIH HHS/ -- R01 AI054359-07/AI/NIAID NIH HHS/ -- R01 AI064705/AI/NIAID NIH HHS/ -- R01 AI064705-06/AI/NIAID NIH HHS/ -- R01 AI081884/AI/NIAID NIH HHS/ -- R01 AI081884-01A2/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2010 Sep 17;329(5998):1530-4. doi: 10.1126/science.1187029.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20847273" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptor Protein Complex 3/genetics/*metabolism ; Adaptor Protein Complex beta Subunits ; Animals ; Cells, Cultured ; Cytokines/genetics/immunology/metabolism ; Cytoplasmic Vesicles/metabolism ; Dendritic Cells/*immunology/metabolism ; Endosomes/metabolism ; Interferon Regulatory Factor-7/metabolism ; Interferon Type I/genetics/immunology/metabolism ; Lysosomal-Associated Membrane Protein 2/metabolism ; Macrophages/immunology ; Membrane Transport Proteins/metabolism ; Mice ; Mice, Inbred C57BL ; Myeloid Differentiation Factor 88/metabolism ; Oligodeoxyribonucleotides/immunology ; Protein Transport ; Recombinant Fusion Proteins/immunology/metabolism ; Signal Transduction ; TNF Receptor-Associated Factor 3/metabolism ; Toll-Like Receptor 9/immunology/*metabolism ; Transcriptional Activation ; Vesicle-Associated Membrane Protein 3/metabolism
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    Plant science. Fertility goddesses as Trojan horses (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-11-13
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Govers, Francine -- Angenent, Gerco C -- New York, N.Y. -- Science. 2010 Nov 12;330(6006):922-3. doi: 10.1126/science.1198347.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Phytopathology, Wageningen University, 1-6708 PB Wageningen, Netherlands. francine.govers@wur.nl〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21071655" target="_blank"〉PubMed〈/a〉
    Keywords: Arabidopsis/genetics/*microbiology/*physiology ; Arabidopsis Proteins/genetics/*metabolism ; Calmodulin-Binding Proteins/genetics/*metabolism ; Fertility ; Fungi/*physiology ; Ligands ; Phosphotransferases/genetics/*metabolism ; Plant Diseases/microbiology ; Plant Leaves/microbiology ; Plants/microbiology ; Pollen Tube/*physiology ; Signal Transduction
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Aryl hydrocarbon receptor antagonists promote the expansion of human hematopoietic stem cells (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-08-07
    Description: Although practiced clinically for more than 40 years, the use of hematopoietic stem cell (HSC) transplants remains limited by the ability to expand these cells ex vivo. An unbiased screen with primary human HSCs identified a purine derivative, StemRegenin 1 (SR1), that promotes the ex vivo expansion of CD34+ cells. Culture of HSCs with SR1 led to a 50-fold increase in cells expressing CD34 and a 17-fold increase in cells that retain the ability to engraft immunodeficient mice. Mechanistic studies show that SR1 acts by antagonizing the aryl hydrocarbon receptor (AHR). The identification of SR1 and AHR modulation as a means to induce ex vivo HSC expansion should facilitate the clinical use of HSC therapy.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3033342/" 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/PMC3033342/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Boitano, Anthony E -- Wang, Jian -- Romeo, Russell -- Bouchez, Laure C -- Parker, Albert E -- Sutton, Sue E -- Walker, John R -- Flaveny, Colin A -- Perdew, Gary H -- Denison, Michael S -- Schultz, Peter G -- Cooke, Michael P -- ES004869/ES/NIEHS NIH HHS/ -- ES007685/ES/NIEHS NIH HHS/ -- ES04699/ES/NIEHS NIH HHS/ -- P42 ES004699/ES/NIEHS NIH HHS/ -- P42 ES004699-24/ES/NIEHS NIH HHS/ -- R01 ES004869/ES/NIEHS NIH HHS/ -- R01 ES004869-23/ES/NIEHS NIH HHS/ -- R01 ES007685/ES/NIEHS NIH HHS/ -- R01 ES007685-11/ES/NIEHS NIH HHS/ -- New York, N.Y. -- Science. 2010 Sep 10;329(5997):1345-8. doi: 10.1126/science.1191536. Epub 2010 Aug 5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20688981" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, CD/analysis ; Antigens, CD34/analysis ; Aryl Hydrocarbon Hydroxylases/genetics/metabolism ; Cell Count ; Cell Lineage ; Cell Proliferation ; Cells, Cultured ; Cytochrome P-450 CYP1B1 ; Cytokines/pharmacology ; Glycoproteins/analysis ; Hematopoiesis ; *Hematopoietic Stem Cell Transplantation ; Hematopoietic Stem Cells/cytology/drug effects/metabolism/*physiology ; Humans ; Mice ; Mice, Inbred NOD ; Mice, SCID ; Multipotent Stem Cells/cytology/drug effects/physiology ; Peptides/analysis ; Purines/*metabolism/*pharmacology ; Receptors, Aryl Hydrocarbon/*antagonists & inhibitors/metabolism ; Signal Transduction ; Small Molecule Libraries ; Species Specificity ; Tetrachlorodibenzodioxin/pharmacology
    Print ISSN: 0036-8075
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    Biophysics. Enforcing order on signaling (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-03-13
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Paszek, Matthew -- Weaver, Valerie -- New York, N.Y. -- Science. 2010 Mar 12;327(5971):1335-6. doi: 10.1126/science.1187865.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Bioengineering and Tissue Regeneration, Department of Surgery, University of California, San Francisco (UCSF), San Francisco, CA 94143, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20223974" target="_blank"〉PubMed〈/a〉
    Keywords: Breast Neoplasms/metabolism/pathology ; Cell Membrane/*metabolism ; Cell Movement ; Ephrin-A1/chemistry/*metabolism ; Humans ; Ligands ; Lipid Bilayers ; *Mechanotransduction, Cellular ; Models, Biological ; Neoplasm Metastasis ; Neoplasms/*metabolism/pathology ; Protein Multimerization ; Receptor, EphA2/*chemistry/*metabolism ; Signal Transduction
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    Motor control by sensory cortex (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-11-27
    Description: Classical studies of mammalian movement control define a prominent role for the primary motor cortex. Investigating the mouse whisker system, we found an additional and equally direct pathway for cortical motor control driven by the primary somatosensory cortex. Whereas activity in primary motor cortex directly evokes exploratory whisker protraction, primary somatosensory cortex directly drives whisker retraction, providing a rapid negative feedback signal for sensorimotor integration. Motor control by sensory cortex suggests the need to reevaluate the functional organization of cortical maps.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Matyas, Ferenc -- Sreenivasan, Varun -- Marbach, Fred -- Wacongne, Catherine -- Barsy, Boglarka -- Mateo, Celine -- Aronoff, Rachel -- Petersen, Carl C H -- New York, N.Y. -- Science. 2010 Nov 26;330(6008):1240-3. doi: 10.1126/science.1195797.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Sensory Processing, Brain Mind Institute, Faculty of Life Sciences, Ecole Polytechnique Federale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21109671" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain Mapping ; Electric Stimulation ; Feedback, Sensory ; Mice ; Mice, Inbred C57BL ; *Motor Activity ; Motor Cortex/physiology ; Neural Pathways/physiology ; Signal Transduction ; Somatosensory Cortex/*physiology ; Vibrissae/*physiology
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    Altered histone acetylation is associated with age-dependent memory impairment in mice (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-05-08
    Description: As the human life span increases, the number of people suffering from cognitive decline is rising dramatically. The mechanisms underlying age-associated memory impairment are, however, not understood. Here we show that memory disturbances in the aging brain of the mouse are associated with altered hippocampal chromatin plasticity. During learning, aged mice display a specific deregulation of histone H4 lysine 12 (H4K12) acetylation and fail to initiate a hippocampal gene expression program associated with memory consolidation. Restoration of physiological H4K12 acetylation reinstates the expression of learning-induced genes and leads to the recovery of cognitive abilities. Our data suggest that deregulated H4K12 acetylation may represent an early biomarker of an impaired genome-environment interaction in the aging mouse brain.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Peleg, Shahaf -- Sananbenesi, Farahnaz -- Zovoilis, Athanasios -- Burkhardt, Susanne -- Bahari-Javan, Sanaz -- Agis-Balboa, Roberto Carlos -- Cota, Perla -- Wittnam, Jessica Lee -- Gogol-Doering, Andreas -- Opitz, Lennart -- Salinas-Riester, Gabriella -- Dettenhofer, Markus -- Kang, Hui -- Farinelli, Laurent -- Chen, Wei -- Fischer, Andre -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2010 May 7;328(5979):753-6. doi: 10.1126/science.1186088.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory for Aging and Cognitive Diseases, European Neuroscience Institute, Grisebach Str. 5, D-37077 Goettingen, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20448184" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylation ; Aging/*genetics ; Animals ; Chromatin/metabolism ; *Chromatin Assembly and Disassembly ; Conditioning (Psychology) ; Epigenesis, Genetic ; Fear ; Gene Expression Profiling ; *Gene Expression Regulation ; Hippocampus/*metabolism ; Histone Deacetylase Inhibitors/metabolism/pharmacology ; Histones/*metabolism ; Hydroxamic Acids/pharmacology ; Learning/drug effects ; Lysine/metabolism ; Memory/drug effects ; Memory Disorders/*genetics/metabolism ; Mice ; Mice, Inbred C57BL ; Microfilament Proteins/genetics/metabolism ; Nuclear Proteins/genetics/metabolism ; Signal Transduction ; Transcription Initiation Site ; Transcription, Genetic ; Up-Regulation
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    Reprogramming cellular behavior with RNA controllers responsive to endogenous proteins (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-11-27
    Description: Synthetic genetic devices that interface with native cellular pathways can be used to change natural networks to implement new forms of control and behavior. The engineering of gene networks has been limited by an inability to interface with native components. We describe a class of RNA control devices that overcome these limitations by coupling increased abundance of particular proteins to targeted gene expression events through the regulation of alternative RNA splicing. We engineered RNA devices that detect signaling through the nuclear factor kappaB and Wnt signaling pathways in human cells and rewire these pathways to produce new behaviors, thereby linking disease markers to noninvasive sensing and reprogrammed cellular fates. Our work provides a genetic platform that can build programmable sensing-actuation devices enabling autonomous control over cellular behavior.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3171693/" 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/PMC3171693/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Culler, Stephanie J -- Hoff, Kevin G -- Smolke, Christina D -- RC1 GM091298/GM/NIGMS NIH HHS/ -- RC1 GM091298-01/GM/NIGMS NIH HHS/ -- RC1 GM091298-02/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2010 Nov 26;330(6008):1251-5. doi: 10.1126/science.1192128.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Chemistry and Chemical Engineering, 1200 East California Boulevard, MC 210-41, California Institute of Technology, Pasadena, CA 91125, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21109673" target="_blank"〉PubMed〈/a〉
    Keywords: *Alternative Splicing ; Apoptosis ; Aptamers, Nucleotide/chemistry/genetics/*metabolism ; Capsid Proteins/metabolism ; Cell Line ; Cell Nucleus/metabolism ; Exons ; Ganciclovir/pharmacology ; *Gene Expression Regulation ; Gene Regulatory Networks ; *Genetic Engineering ; Green Fluorescent Proteins/genetics ; Humans ; Introns ; Ligands ; Mutation ; NF-kappa B p50 Subunit/genetics/metabolism ; Protein Binding ; Signal Transduction ; Survival of Motor Neuron 1 Protein/genetics ; Transcription Factor RelA/genetics/metabolism ; Transfection ; Wnt Proteins/metabolism ; beta Catenin/genetics/metabolism
    Print ISSN: 0036-8075
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    Conserved molecular components for pollen tube reception and fungal invasion (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-11-13
    Description: During sexual reproduction in flowering plants such as Arabidopsis, a tip-growing pollen tube (PT) is guided to the synergid cells of the female gametophyte, where it bursts and releases the two sperm. Here we show that PT reception and powdery mildew (PM) infection, which involves communication between a tip-growing hypha and a plant epidermal cell, share molecular components. NORTIA (NTA), a member of the MLO family originally discovered in the context of PM resistance, and FERONIA (FER), a receptor-like kinase, both control PT reception in synergids. Homozygous fer mutants also display PM resistance, revealing a new function for FER and suggesting that conserved components, such as FER and distinct MLO proteins, are involved in both PT reception and PM infection.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kessler, Sharon A -- Shimosato-Asano, Hiroko -- Keinath, Nana F -- Wuest, Samuel E -- Ingram, Gwyneth -- Panstruga, Ralph -- Grossniklaus, Ueli -- New York, N.Y. -- Science. 2010 Nov 12;330(6006):968-71. doi: 10.1126/science.1195211.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Plant Biology and Zurich Basel Plant Science Center, University of Zurich, Zollikerstrasse 107, CH-8008 Zurich, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21071669" target="_blank"〉PubMed〈/a〉
    Keywords: Arabidopsis/genetics/*microbiology/*physiology ; Arabidopsis Proteins/chemistry/genetics/*metabolism ; Ascomycota/*physiology ; Calmodulin-Binding Proteins/chemistry/genetics/*metabolism ; Fertility ; Flowers/genetics ; Gene Expression Profiling ; Genes, Plant ; Hyphae/physiology ; Mutation ; Phosphotransferases/genetics/*metabolism ; Plant Diseases/*microbiology ; Plant Leaves/microbiology ; Pollen/genetics ; Pollen Tube/*physiology ; Pollination ; Recombinant Fusion Proteins/metabolism ; Seeds/growth & development ; Signal Transduction ; Spores, Fungal/physiology ; Transformation, Genetic
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    Local and long-range reciprocal regulation of cAMP and cGMP in axon/dendrite formation (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-01-30
    Description: Cytosolic cyclic adenosine monophosphate (cAMP) and cyclic guanosine monophosphate (cGMP) often mediate antagonistic cellular actions of extracellular factors, from the regulation of ion channels to cell volume control and axon guidance. We found that localized cAMP and cGMP activities in undifferentiated neurites of cultured hippocampal neurons promote and suppress axon formation, respectively, and exert opposite effects on dendrite formation. Fluorescence resonance energy transfer imaging showed that alterations of the amount of cAMP resulted in opposite changes in the amount of cGMP, and vice versa, through the activation of specific phosphodiesterases and protein kinases. Local elevation of cAMP in one neurite resulted in cAMP reduction in all other neurites of the same neuron. Thus, local and long-range reciprocal regulation of cAMP and cGMP together ensures coordinated development of one axon and multiple dendrites.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shelly, Maya -- Lim, Byung Kook -- Cancedda, Laura -- Heilshorn, Sarah C -- Gao, Hongfeng -- Poo, Mu-ming -- NS-22764/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 2010 Jan 29;327(5965):547-52. doi: 10.1126/science.1179735.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Neurobiology, Department of Molecular and Cell Biology, Helen Wills Neuroscience Institute, University of California, Berkeley, CA 94720, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20110498" target="_blank"〉PubMed〈/a〉
    Keywords: Adenylyl Cyclase Inhibitors ; Adenylyl Cyclases/metabolism ; Animals ; Axons/metabolism/*physiology ; Cell Differentiation ; Cell Line ; Cell Polarity ; Cells, Cultured ; Cyclic AMP/*metabolism ; Cyclic AMP-Dependent Protein Kinases/antagonists & inhibitors/metabolism ; Cyclic GMP/*metabolism ; Dendrites/metabolism/*physiology ; Enzyme Inhibitors/pharmacology ; Fluorescence Resonance Energy Transfer ; Guanylate Cyclase/antagonists & inhibitors/metabolism ; Hippocampus/*cytology ; Humans ; Neurites/metabolism/physiology ; Neurons/cytology/*physiology ; Phosphodiesterase Inhibitors/pharmacology ; Phosphoric Diester Hydrolases/metabolism ; Phosphorylation ; Rats ; Signal Transduction ; Transfection
    Print ISSN: 0036-8075
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    A global protein kinase and phosphatase interaction network in yeast (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-05-22
    Description: The interactions of protein kinases and phosphatases with their regulatory subunits and substrates underpin cellular regulation. We identified a kinase and phosphatase interaction (KPI) network of 1844 interactions in budding yeast by mass spectrometric analysis of protein complexes. The KPI network contained many dense local regions of interactions that suggested new functions. Notably, the cell cycle phosphatase Cdc14 associated with multiple kinases that revealed roles for Cdc14 in mitogen-activated protein kinase signaling, the DNA damage response, and metabolism, whereas interactions of the target of rapamycin complex 1 (TORC1) uncovered new effector kinases in nitrogen and carbon metabolism. An extensive backbone of kinase-kinase interactions cross-connects the proteome and may serve to coordinate diverse cellular responses.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3983991/" 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/PMC3983991/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Breitkreutz, Ashton -- Choi, Hyungwon -- Sharom, Jeffrey R -- Boucher, Lorrie -- Neduva, Victor -- Larsen, Brett -- Lin, Zhen-Yuan -- Breitkreutz, Bobby-Joe -- Stark, Chris -- Liu, Guomin -- Ahn, Jessica -- Dewar-Darch, Danielle -- Reguly, Teresa -- Tang, Xiaojing -- Almeida, Ricardo -- Qin, Zhaohui Steve -- Pawson, Tony -- Gingras, Anne-Claude -- Nesvizhskii, Alexey I -- Tyers, Mike -- CA-126239/CA/NCI NIH HHS/ -- MOP-12246/Canadian Institutes of Health Research/Canada -- MOP-57793/Canadian Institutes of Health Research/Canada -- MOP-84314/Canadian Institutes of Health Research/Canada -- R01 CA126239/CA/NCI NIH HHS/ -- R01 GM094231/GM/NIGMS NIH HHS/ -- R01 OD010929/OD/NIH HHS/ -- R01 RR024031/RR/NCRR NIH HHS/ -- R01 RR024031-05/RR/NCRR NIH HHS/ -- R01RR024031/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 2010 May 21;328(5981):1043-6. doi: 10.1126/science.1176495.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Centre for Systems Biology, Samuel Lunenfeld Research Institute, 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/20489023" target="_blank"〉PubMed〈/a〉
    Keywords: Binding Sites ; Carbon/metabolism ; Cell Cycle Proteins/metabolism ; DNA Damage ; MAP Kinase Signaling System ; Mass Spectrometry ; Metabolic Networks and Pathways ; Models, Biological ; Nitrogen/metabolism ; Phosphoprotein Phosphatases/*metabolism ; Phosphorylation ; Protein Interaction Mapping ; Protein Kinases/*metabolism ; Protein Subunits/metabolism ; Protein Tyrosine Phosphatases/metabolism ; Protein-Serine-Threonine Kinases/metabolism ; Proteome ; Saccharomyces cerevisiae/*enzymology/metabolism ; Saccharomyces cerevisiae Proteins/*metabolism ; Signal Transduction
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    A Vibrio effector protein is an inositol phosphatase and disrupts host cell membrane integrity (2010)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2010-08-21
    Description: The marine bacterium Vibrio parahaemolyticus causes gastroenteritis in humans and encodes the type III effector protein VPA0450, which contributes to host cell death caused by autophagy, cell rounding, and cell lysis. We found that VPA0450 is an inositol polyphosphate 5-phosphatase that hydrolyzed the D5 phosphate from the plasma membrane phospholipid phosphatidylinositol 4,5-bisphosphate. VPA0450 disrupted cytoskeletal binding sites on the inner surface of membranes of human cells and caused plasma membrane blebbing, which compromised membrane integrity and probably contributed to cell death by facilitating lysis. Thus, bacterial pathogens can disrupt adaptor protein-binding sites required for proper membrane and cytoskeleton dynamics by altering the homeostasis of membrane-bound inositol-signaling molecules.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Broberg, Christopher A -- Zhang, Lingling -- Gonzalez, Herman -- Laskowski-Arce, Michelle A -- Orth, Kim -- 5T32GM008203/GM/NIGMS NIH HHS/ -- R01-AI056404/AI/NIAID NIH HHS/ -- R01-AI087808/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2010 Sep 24;329(5999):1660-2. doi: 10.1126/science.1192850. Epub 2010 Aug 19.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20724587" target="_blank"〉PubMed〈/a〉
    Keywords: Actins/metabolism ; Amino Acid Sequence ; Autophagy ; Bacterial Proteins/chemistry/genetics/*metabolism ; Binding Sites ; Cell Membrane/*physiology/ultrastructure ; Cell Shape ; Computational Biology ; Cytoskeleton/physiology/ultrastructure ; HeLa Cells ; Homeostasis ; Humans ; Molecular Sequence Data ; Phosphatidylinositol 4,5-Diphosphate/metabolism ; Phosphatidylinositols/*metabolism ; Phosphoric Monoester Hydrolases/chemistry/genetics/*metabolism ; Protein Interaction Domains and Motifs ; Signal Transduction ; Transfection ; Vibrio parahaemolyticus/*enzymology/*pathogenicity
    Print ISSN: 0036-8075
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    Kinetic scaffolding mediated by a phospholipase C-beta and Gq signaling complex (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-10-23
    Description: Transmembrane signals initiated by a broad range of extracellular stimuli converge on nodes that regulate phospholipase C (PLC)-dependent inositol lipid hydrolysis for signal propagation. We describe how heterotrimeric guanine nucleotide-binding proteins (G proteins) activate PLC-betas and in turn are deactivated by these downstream effectors. The 2.7-angstrom structure of PLC-beta3 bound to activated Galpha(q) reveals a conserved module found within PLC-betas and other effectors optimized for rapid engagement of activated G proteins. The active site of PLC-beta3 in the complex is occluded by an intramolecular plug that is likely removed upon G protein-dependent anchoring and orientation of the lipase at membrane surfaces. A second domain of PLC-beta3 subsequently accelerates guanosine triphosphate hydrolysis by Galpha(q), causing the complex to dissociate and terminate signal propagation. Mutations within this domain dramatically delay signal termination in vitro and in vivo. Consequently, this work suggests a dynamic catch-and-release mechanism used to sharpen spatiotemporal signals mediated by diverse sensory inputs.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3046049/" 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/PMC3046049/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Waldo, Gary L -- Ricks, Tiffany K -- Hicks, Stephanie N -- Cheever, Matthew L -- Kawano, Takeharu -- Tsuboi, Kazuhito -- Wang, Xiaoyue -- Montell, Craig -- Kozasa, Tohru -- Sondek, John -- Harden, T Kendall -- EY010852/EY/NEI NIH HHS/ -- GM074001/GM/NIGMS NIH HHS/ -- GM38213/GM/NIGMS NIH HHS/ -- GM57391/GM/NIGMS NIH HHS/ -- GM61454/GM/NIGMS NIH HHS/ -- R01 GM057391/GM/NIGMS NIH HHS/ -- R01 GM057391-13/GM/NIGMS NIH HHS/ -- R01 GM062299/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2010 Nov 12;330(6006):974-80. doi: 10.1126/science.1193438. Epub 2010 Oct 21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pharmacology, University of North Carolina School of Medicine, Chapel Hill, NC 27599, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20966218" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Catalytic Domain ; Crystallography, X-Ray ; Enzyme Activation ; GTP-Binding Protein alpha Subunits, Gq-G11/*chemistry/*metabolism ; Guanosine Triphosphate/metabolism ; Humans ; Hydrogen Bonding ; Hydrolysis ; Isoenzymes/chemistry/metabolism ; Kinetics ; Mice ; Models, Molecular ; Molecular Sequence Data ; Mutagenesis ; Phospholipase C beta/*chemistry/metabolism ; Protein Binding ; Protein Structure, Tertiary ; Recombinant Fusion Proteins/chemistry/metabolism ; Signal Transduction
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    On getting there from here (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-12-04
    Description: Studies on a variety of interesting biological problems, ranging from circadian rhythm to cancer cell growth to longevity, have begun to give evidence that the physiological state of cells and tissues reflects both the cell's regulatory systems and its state of intermediary metabolism. It is appreciated that the regulatory state of a cell or tissue, as driven by transcription factors and signaling pathways, can impose itself upon the dynamics of metabolic state. It follows that the reciprocal must also be the case, that metabolic state will feed back to impose itself on regulatory state. An appreciation and understanding of this reciprocity may be required to crack open problems in biological research that have heretofore been insoluble.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McKnight, Steven L -- New York, N.Y. -- Science. 2010 Dec 3;330(6009):1338-9. doi: 10.1126/science.1199908.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390-9152, USA. steven.mcknight@utsouthwestern.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21127243" target="_blank"〉PubMed〈/a〉
    Keywords: Enzymes/genetics/*metabolism ; Gene Expression Regulation, Neoplastic ; Glycolysis ; Humans ; *Metabolism ; Mutation ; Neoplasm Proteins/genetics/*metabolism ; Neoplasms/genetics/*metabolism ; Signal Transduction ; Transcription Factors/metabolism ; Tumor Cells, Cultured
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    Lgr6 marks stem cells in the hair follicle that generate all cell lineages of the skin (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-03-13
    Description: Mammalian epidermis consists of three self-renewing compartments: the hair follicle, the sebaceous gland, and the interfollicular epidermis. We generated knock-in alleles of murine Lgr6, a close relative of the Lgr5 stem cell gene. Lgr6 was expressed in the earliest embryonic hair placodes. In adult hair follicles, Lgr6+ cells resided in a previously uncharacterized region directly above the follicle bulge. They expressed none of the known bulge stem cell markers. Prenatal Lgr6+ cells established the hair follicle, sebaceous gland, and interfollicular epidermis. Postnatally, Lgr6+ cells generated sebaceous gland and interfollicular epidermis, whereas contribution to hair lineages gradually diminished with age. Adult Lgr6+ cells executed long-term wound repair, including the formation of new hair follicles. We conclude that Lgr6 marks the most primitive epidermal stem cell.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Snippert, Hugo J -- Haegebarth, Andrea -- Kasper, Maria -- Jaks, Viljar -- van Es, Johan H -- Barker, Nick -- van de Wetering, Marc -- van den Born, Maaike -- Begthel, Harry -- Vries, Robert G -- Stange, Daniel E -- Toftgard, Rune -- Clevers, Hans -- New York, N.Y. -- Science. 2010 Mar 12;327(5971):1385-9. doi: 10.1126/science.1184733.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Hubrecht Institute-KNAW (Royal Netherlands Academy of Arts and Sciences) and University Medical Center Utrecht, Uppsalalaan 8, 3584 CT Utrecht, Netherlands.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20223988" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Cell Lineage ; Epidermis/cytology ; Gene Expression Profiling ; Gene Knock-In Techniques ; Hair/cytology/embryology/growth & development ; Hair Follicle/*cytology/embryology/growth & development ; Mice ; Mice, Nude ; Receptors, G-Protein-Coupled/*genetics/*metabolism ; Sebaceous Glands/cytology ; Signal Transduction ; Skin/*cytology ; Stem Cell Transplantation ; Stem Cells/*cytology/metabolism ; Wound Healing
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Retrospective. Edwin G. Krebs (1918-2009) (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-01-30
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Catterall, William A -- Scott, John D -- New York, N.Y. -- Science. 2010 Jan 29;327(5965):537. doi: 10.1126/science.1186913.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pharmacology, School of Medicine, University of Washington, Seattle, WA 98195-7280, USA. wcatt@u.washington.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20110494" target="_blank"〉PubMed〈/a〉
    Keywords: Biochemistry/*history ; History, 20th Century ; History, 21st Century ; Nobel Prize ; Phosphorylases/history/metabolism ; Phosphorylation ; Protein Kinases/history/metabolism ; Proteins/metabolism ; Signal Transduction ; United States
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    SphK1 regulates proinflammatory responses associated with endotoxin and polymicrobial sepsis (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-06-05
    Description: During sepsis, activation of phagocytes leads to the overproduction of proinflammatory cytokines, causing systemic inflammation. Despite substantial information regarding the underlying molecular mechanisms that lead to sepsis, several elements in the pathway remain to be elucidated. We found that the enzyme sphingosine kinase 1 (SphK1) is up-regulated in stimulated human phagocytes and in peritoneal phagocytes of patients with severe sepsis. Blockade of SphK1 inhibited phagocyte production of endotoxin-induced proinflammatory cytokines. We observed protection against sepsis in mice treated with a specific SphK1 inhibitor that was enhanced by treatment with a broad-spectrum antibiotic. These results demonstrated a critical role for SphK1 in endotoxin signaling and sepsis-induced inflammatory responses and suggest that inhibition of SphK1 is a potential therapy for septic shock.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Puneet, Padmam -- Yap, Celestial T -- Wong, Lingkai -- Lam, Yulin -- Koh, Dow Rhoon -- Moochhala, Shabbir -- Pfeilschifter, Josef -- Huwiler, Andrea -- Melendez, Alirio J -- G0700794/Medical Research Council/United Kingdom -- Medical Research Council/United Kingdom -- New York, N.Y. -- Science. 2010 Jun 4;328(5983):1290-4. doi: 10.1126/science.1188635.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Physiology, National University of Singapore, 117597 Singapore.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20522778" target="_blank"〉PubMed〈/a〉
    Keywords: Adolescent ; Adult ; Aged ; Aged, 80 and over ; Animals ; Bacterial Proteins/immunology ; Cytokines/blood/*metabolism ; Endotoxins ; Enzyme Activation ; Enzyme Inhibitors/pharmacology/therapeutic use ; Female ; Humans ; *Inflammation ; Lipopolysaccharides/immunology ; Lipoproteins/immunology ; Macrophages/enzymology/immunology ; Macrophages, Peritoneal/*enzymology/immunology ; Male ; Mice ; Middle Aged ; NF-kappa B/metabolism ; Neutrophils/*enzymology/immunology ; Peritonitis/enzymology/immunology ; Phosphotransferases (Alcohol Group Acceptor)/antagonists & ; inhibitors/genetics/*metabolism ; Protein Kinase C-delta/metabolism ; RNA Interference ; Sepsis/drug therapy/enzymology/*immunology ; Shock, Septic/enzymology/*immunology ; Signal Transduction ; Up-Regulation ; Young Adult
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    RIGorous detection: exposing virus through RNA sensing (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-01-16
    Description: Virus infection in mammals elicits a variety of defense responses that are initiated by signals from virus-sensing receptors expressed by the host. These receptors include the ubiquitously expressed RIG-I-like receptor (RLR) family of RNA helicases. RLRs are cytoplasmic proteins that act in cell-intrinsic antiviral defense by recognizing RNAs indicative of virus presence. Here, we highlight recent progress in understanding how RLRs discriminate between the RNA content of healthy versus virus-infected cells, functioning as accurate sensors of virus invasion.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rehwinkel, Jan -- Reis e Sousa, Caetano -- Cancer Research UK/United Kingdom -- New York, N.Y. -- Science. 2010 Jan 15;327(5963):284-6. doi: 10.1126/science.1185068.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Immunobiology Laboratory, Cancer Research UK (CRUK) London Research Institute, 44 Lincoln's Inn Fields, London WC2A 3PX, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20075242" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Pairing ; DEAD-box RNA Helicases/chemistry/immunology/*metabolism ; Genome, Viral ; Humans ; *Immunity, Innate ; Interferons/biosynthesis ; Nucleic Acid Conformation ; Protein Structure, Tertiary ; RNA Virus Infections/*immunology ; RNA Viruses/genetics/*immunology ; RNA, Double-Stranded/immunology/metabolism ; RNA, Viral/chemistry/*immunology/*metabolism ; Receptors, Pattern Recognition/chemistry/immunology/*metabolism ; Signal Transduction ; Viral Proteins/immunology/metabolism
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    An essential developmental checkpoint for production of the T cell lineage (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-07-03
    Description: In early T cell development, progenitors retaining the potential to generate myeloid and natural killer lineages are eventually determined to a specific T cell lineage. The molecular mechanisms that drive this determination step remain unclarified. We show that, when murine hematopoietic progenitors were cultured on immobilized Notch ligand DLL4 protein in the presence of a cocktail of cytokines including interleukin-7, progenitors developing toward T cells were arrested and the arrested cells entered a self-renewal cycle, maintaining non-T lineage potentials. Reduced concentrations of interleukin-7 promoted T cell lineage determination. A similar arrest and self-renewal of progenitors were observed in thymocytes of mice deficient in the transcription factor Bcl11b. Our study thus identifies the earliest checkpoint during T cell development and shows that it is Bcl11b-dependent.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ikawa, Tomokatsu -- Hirose, Satoshi -- Masuda, Kyoko -- Kakugawa, Kiyokazu -- Satoh, Rumi -- Shibano-Satoh, Asako -- Kominami, Ryo -- Katsura, Yoshimoto -- Kawamoto, Hiroshi -- New York, N.Y. -- Science. 2010 Jul 2;329(5987):93-6. doi: 10.1126/science.1188995.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory for Lymphocyte Development, RIKEN Research Center for Allergy and Immunology, Yokohama 230-0045, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20595615" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Cell Lineage ; Cells, Cultured ; Coculture Techniques ; Gene Expression Regulation, Developmental ; Gene Rearrangement, beta-Chain T-Cell Antigen Receptor ; Hematopoietic Stem Cells/cytology/*physiology ; Interleukin-7/metabolism ; Liver/embryology ; *Lymphopoiesis/genetics ; Mice ; Mice, Inbred C57BL ; Mice, Transgenic ; Precursor Cells, T-Lymphoid/cytology/*physiology ; Repressor Proteins/genetics/*metabolism ; Signal Transduction ; T-Lymphocytes/*cytology/*physiology ; Tumor Suppressor Proteins/genetics/*metabolism ; Up-Regulation
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Sestrin as a feedback inhibitor of TOR that prevents age-related pathologies (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-03-06
    Description: Sestrins are conserved proteins that accumulate in cells exposed to stress, potentiate adenosine monophosphate-activated protein kinase (AMPK), and inhibit activation of target of rapamycin (TOR). We show that the abundance of Drosophila sestrin (dSesn) is increased upon chronic TOR activation through accumulation of reactive oxygen species that cause activation of c-Jun amino-terminal kinase and transcription factor Forkhead box O (FoxO). Loss of dSesn resulted in age-associated pathologies including triglyceride accumulation, mitochondrial dysfunction, muscle degeneration, and cardiac malfunction, which were prevented by pharmacological activation of AMPK or inhibition of TOR. Hence, dSesn appears to be a negative feedback regulator of TOR that integrates metabolic and stress inputs and prevents pathologies caused by chronic TOR activation that may result from diminished autophagic clearance of damaged mitochondria, protein aggregates, or lipids.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2866632/" 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/PMC2866632/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lee, Jun Hee -- Budanov, Andrei V -- Park, Eek Joong -- Birse, Ryan -- Kim, Teddy E -- Perkins, Guy A -- Ocorr, Karen -- Ellisman, Mark H -- Bodmer, Rolf -- Bier, Ethan -- Karin, Michael -- AI070654/AI/NIAID NIH HHS/ -- CA118165/CA/NCI NIH HHS/ -- DK082080/DK/NIDDK NIH HHS/ -- ES006376/ES/NIEHS NIH HHS/ -- NS29870/NS/NINDS NIH HHS/ -- P30 CA023100/CA/NCI NIH HHS/ -- P30-CA23100/CA/NCI NIH HHS/ -- P41-RR004050/RR/NCRR NIH HHS/ -- P42 ES010337/ES/NIEHS NIH HHS/ -- P42 ES010337-10S20010/ES/NIEHS NIH HHS/ -- P42-ES010337/ES/NIEHS NIH HHS/ -- R01 CA118165/CA/NCI NIH HHS/ -- R01 CA118165-04/CA/NCI NIH HHS/ -- R01 ES006376/ES/NIEHS NIH HHS/ -- R01 ES006376-17/ES/NIEHS NIH HHS/ -- New York, N.Y. -- Science. 2010 Mar 5;327(5970):1223-8. doi: 10.1126/science.1182228.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Gene Regulation and Signal Transduction, Department of Pharmacology, School of Medicine, University of California San Diego (UCSD), La Jolla, CA 92093-0723, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20203043" target="_blank"〉PubMed〈/a〉
    Keywords: AMP-Activated Protein Kinases/metabolism ; *Aging ; Amino Acid Sequence ; Animals ; Autophagy ; Cell Size ; Drosophila Proteins/antagonists & ; inhibitors/chemistry/genetics/metabolism/*physiology ; Drosophila melanogaster/cytology/growth & development/metabolism/*physiology ; Fat Body/metabolism ; Feedback, Physiological ; Forkhead Transcription Factors/metabolism ; Gene Expression Regulation ; Heart/physiology ; Heat-Shock Proteins/chemistry/genetics/*physiology ; JNK Mitogen-Activated Protein Kinases/metabolism ; Mitochondria, Muscle/physiology/ultrastructure ; Models, Animal ; Molecular Sequence Data ; Muscles/physiology ; Oxidative Stress ; Protein Kinases/*metabolism ; Reactive Oxygen Species/metabolism ; Signal Transduction ; TOR Serine-Threonine Kinases ; Transcription, Genetic ; Triglycerides/metabolism ; Wings, Animal/cytology/growth & development/metabolism
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    Metabolism. Metabolism is not boring. Introduction (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-12-04
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ray, L Bryan -- New York, N.Y. -- Science. 2010 Dec 3;330(6009):1337. doi: 10.1126/science.330.6009.1337.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21127242" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Cell Physiological Phenomena ; Humans ; Metabolic Networks and Pathways ; *Metabolism ; Neoplasms/metabolism ; Signal Transduction
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    Epigenetics. What is epigenetics? Introduction (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-10-30
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Riddihough, Guy -- Zahn, Laura M -- New York, N.Y. -- Science. 2010 Oct 29;330(6004):611. doi: 10.1126/science.330.6004.611.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21030643" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; DNA Methylation ; *Epigenesis, Genetic ; Histones/metabolism ; Humans ; Neoplasms/drug therapy/genetics ; Protein Processing, Post-Translational ; RNA/genetics/metabolism ; Signal Transduction
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    ATP-binding cassette transporters and HDL suppress hematopoietic stem cell proliferation (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-05-22
    Description: Elevated leukocyte cell numbers (leukocytosis), and monocytes in particular, promote atherosclerosis; however, how they become increased is poorly understood. Mice deficient in the adenosine triphosphate-binding cassette (ABC) transporters ABCA1 and ABCG1, which promote cholesterol efflux from macrophages and suppress atherosclerosis in hypercholesterolemic mice, displayed leukocytosis, a transplantable myeloproliferative disorder, and a dramatic expansion of the stem and progenitor cell population containing Lin(-)Sca-1(+)Kit+ (LSK) in the bone marrow. Transplantation of Abca1(-/-) Abcg1(-/-) bone marrow into apolipoprotein A-1 transgenic mice with elevated levels of high-density lipoprotein (HDL) suppressed the LSK population, reduced leukocytosis, reversed the myeloproliferative disorder, and accelerated atherosclerosis. The findings indicate that ABCA1, ABCG1, and HDL inhibit the proliferation of hematopoietic stem and multipotential progenitor cells and connect expansion of these populations with leukocytosis and accelerated atherosclerosis.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3032591/" 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/PMC3032591/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yvan-Charvet, Laurent -- Pagler, Tamara -- Gautier, Emmanuel L -- Avagyan, Serine -- Siry, Read L -- Han, Seongah -- Welch, Carrie L -- Wang, Nan -- Randolph, Gwendalyn J -- Snoeck, Hans W -- Tall, Alan R -- HL54591/HL/NHLBI NIH HHS/ -- R01 AG029626/AG/NIA NIH HHS/ -- R01 AI049653/AI/NIAID NIH HHS/ -- R01 AI049653-09/AI/NIAID NIH HHS/ -- R01 AI049653-10/AI/NIAID NIH HHS/ -- R01 AI061741/AI/NIAID NIH HHS/ -- R01 AI061741-03/AI/NIAID NIH HHS/ -- R01 AI061741-04/AI/NIAID NIH HHS/ -- R01A1061741/PHS HHS/ -- R01AG016327/AG/NIA NIH HHS/ -- New York, N.Y. -- Science. 2010 Jun 25;328(5986):1689-93. doi: 10.1126/science.1189731. Epub 2010 May 20.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Molecular Medicine, Department of Medicine, Columbia University, New York, NY 10032, USA. ly2159@columbia.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20488992" target="_blank"〉PubMed〈/a〉
    Keywords: ATP Binding Cassette Transporter 1 ; ATP-Binding Cassette Transporters/genetics/*metabolism ; Animals ; Apolipoprotein A-I/genetics/metabolism ; Atherosclerosis/metabolism/*physiopathology/therapy ; Bone Marrow Transplantation ; Cell Proliferation ; Cells, Cultured ; Cholesterol/*metabolism ; Hematopoietic Stem Cells/*physiology ; Hypercholesterolemia/metabolism ; Leukocytosis/metabolism/*physiopathology/therapy ; Lipoproteins/genetics/*metabolism ; Lipoproteins, HDL/*metabolism ; Macrophages/metabolism ; Mice ; Mice, Inbred C57BL ; Mice, Inbred DBA ; Mice, Transgenic ; Multipotent Stem Cells/physiology ; Myeloid Progenitor Cells/*physiology ; Myeloproliferative Disorders/metabolism/physiopathology/therapy ; Phenotype ; Receptors, Granulocyte-Macrophage Colony-Stimulating Factor/metabolism ; Receptors, Interleukin-3/metabolism ; Signal Transduction
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    Zebrafish behavioral profiling links drugs to biological targets and rest/wake regulation (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-01-16
    Description: A major obstacle for the discovery of psychoactive drugs is the inability to predict how small molecules will alter complex behaviors. We report the development and application of a high-throughput, quantitative screen for drugs that alter the behavior of larval zebrafish. We found that the multidimensional nature of observed phenotypes enabled the hierarchical clustering of molecules according to shared behaviors. Behavioral profiling revealed conserved functions of psychotropic molecules and predicted the mechanisms of action of poorly characterized compounds. In addition, behavioral profiling implicated new factors such as ether-a-go-go-related gene (ERG) potassium channels and immunomodulators in the control of rest and locomotor activity. These results demonstrate the power of high-throughput behavioral profiling in zebrafish to discover and characterize psychotropic drugs and to dissect the pharmacology of complex behaviors.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2830481/" 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/PMC2830481/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rihel, Jason -- Prober, David A -- Arvanites, Anthony -- Lam, Kelvin -- Zimmerman, Steven -- Jang, Sumin -- Haggarty, Stephen J -- Kokel, David -- Rubin, Lee L -- Peterson, Randall T -- Schier, Alexander F -- K01 MH091449/MH/NIMH NIH HHS/ -- K99 NS060996/NS/NINDS NIH HHS/ -- MH085205/MH/NIMH NIH HHS/ -- MH086867/MH/NIMH NIH HHS/ -- R00 NS060996/NS/NINDS NIH HHS/ -- R01 GM085357/GM/NIGMS NIH HHS/ -- R01 GM085357-01A1/GM/NIGMS NIH HHS/ -- R01 GM085357-02/GM/NIGMS NIH HHS/ -- R01 MH086867/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 2010 Jan 15;327(5963):348-51. doi: 10.1126/science.1183090.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular and Cellular Biology, Harvard University, Cambridge, MA 02138, USA. rihel@fas.harvard.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20075256" target="_blank"〉PubMed〈/a〉
    Keywords: Algorithms ; Animals ; Anti-Inflammatory Agents/pharmacology ; Behavior, Animal/*drug effects ; Calcium Channel Blockers/pharmacology ; Calcium Channels, L-Type/metabolism ; Cluster Analysis ; Cytokines/metabolism ; Drug Discovery/*methods ; Ether-A-Go-Go Potassium Channels/antagonists & inhibitors/physiology ; *High-Throughput Screening Assays ; Larva/drug effects/physiology ; Motor Activity/*drug effects ; Potassium Channel Blockers/pharmacology ; Psychotropic Drugs/*pharmacology ; Rest ; Signal Transduction ; Sleep/drug effects ; Small Molecule Libraries ; Wakefulness/*drug effects ; Zebrafish/growth & development/*physiology ; Zebrafish Proteins/metabolism
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    Protein kinase C-theta mediates negative feedback on regulatory T cell function (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-03-27
    Description: T cell receptor (TCR)-dependent regulatory T cell (Treg) activity controls effector T cell (Teff) function and is inhibited by the inflammatory cytokine tumor necrosis factor-alpha (TNF-alpha). Protein kinase C-theta (PKC-theta) recruitment to the immunological synapse is required for full Teff activation. In contrast, PKC-theta was sequestered away from the Treg immunological synapse. Furthermore, PKC-theta blockade enhanced Treg function, demonstrating PKC-theta inhibits Treg-mediated suppression. Inhibition of PKC-theta protected Treg from inactivation by TNF-alpha, restored activity of defective Treg from rheumatoid arthritis patients, and enhanced protection of mice from inflammatory colitis. Treg freed of PKC-theta-mediated inhibition can function in the presence of inflammatory cytokines and thus have therapeutic potential in control of inflammatory diseases.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2905626/" 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/PMC2905626/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zanin-Zhorov, Alexandra -- Ding, Yi -- Kumari, Sudha -- Attur, Mukundan -- Hippen, Keli L -- Brown, Maryanne -- Blazar, Bruce R -- Abramson, Steven B -- Lafaille, Juan J -- Dustin, Michael L -- P01 AI056299/AI/NIAID NIH HHS/ -- PN2 EY016586/EY/NEI NIH HHS/ -- PN2 EY016586-06/EY/NEI NIH HHS/ -- R01 AI055037/AI/NIAID NIH HHS/ -- R01 AI055037-06A1/AI/NIAID NIH HHS/ -- R01 AI43542/AI/NIAID NIH HHS/ -- R01 HL056067/HL/NHLBI NIH HHS/ -- R37 AI043542/AI/NIAID NIH HHS/ -- R37 AI043542-12/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2010 Apr 16;328(5976):372-6. doi: 10.1126/science.1186068. Epub 2010 Mar 25.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Molecular Pathogenesis Program, Helen and Martin Kimmel Center for Biology and Medicine, Skirball Institute of Biomolecular Medicine, Department of Pathology, New York University School of Medicine, New York, NY 10016, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20339032" target="_blank"〉PubMed〈/a〉
    Keywords: Adolescent ; Adult ; Aged ; Animals ; Arthritis, Rheumatoid/immunology ; Colitis/immunology/prevention & control ; Enzyme Inhibitors/pharmacology ; Feedback, Physiological ; Humans ; Immunological Synapses/*immunology ; Inflammation/*immunology ; Interferon-gamma/metabolism ; Isoenzymes/antagonists & inhibitors/*metabolism ; Lymphocyte Activation ; Mice ; Mice, Inbred C57BL ; Middle Aged ; Protein Kinase C/antagonists & inhibitors/*metabolism ; Receptors, Antigen, T-Cell/immunology/metabolism ; Signal Transduction ; T-Lymphocyte Subsets/*immunology/metabolism ; T-Lymphocytes, Regulatory/*immunology/metabolism ; Tumor Necrosis Factor-alpha/metabolism ; Young Adult
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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    Human-restricted bacterial pathogens block shedding of epithelial cells by stimulating integrin activation (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-09-04
    Description: Colonization of mucosal surfaces is the key initial step in most bacterial infections. One mechanism protecting the mucosa is the rapid shedding of epithelial cells, also termed exfoliation, but it is unclear how pathogens counteract this process. We found that carcinoembryonic antigen (CEA)-binding bacteria colonized the urogenital tract of CEA transgenic mice, but not of wild-type mice, by suppressing exfoliation of mucosal cells. CEA binding triggered de novo expression of the transforming growth factor receptor CD105, changing focal adhesion composition and activating beta1 integrins. This manipulation of integrin inside-out signaling promotes efficient mucosal colonization and represents a potential target to prevent or cure bacterial infections.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Muenzner, Petra -- Bachmann, Verena -- Zimmermann, Wolfgang -- Hentschel, Jochen -- Hauck, Christof R -- New York, N.Y. -- Science. 2010 Sep 3;329(5996):1197-201. doi: 10.1126/science.1190892.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Lehrstuhl Zellbiologie, Fachbereich Biologie, Universitat Konstanz, 78457 Konstanz, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20813953" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, Bacterial/metabolism ; Antigens, CD/metabolism ; Carcinoembryonic Antigen/genetics/*metabolism ; Cytoskeletal Proteins/metabolism ; Epithelial Cells/microbiology/*pathology ; Female ; Focal Adhesions ; GPI-Linked Proteins ; Glycoproteins/metabolism ; Gonorrhea/*microbiology ; Humans ; Integrin beta Chains/*metabolism ; Intracellular Signaling Peptides and Proteins/metabolism ; Mice ; Mice, Inbred C57BL ; Mice, Transgenic ; Mucous Membrane/microbiology ; Neisseria gonorrhoeae/isolation & purification/*metabolism/*pathogenicity ; Receptors, Cell Surface/metabolism ; Recombinant Fusion Proteins/metabolism ; Signal Transduction ; Transfection ; Vagina/cytology/*microbiology/pathology ; Zyxin
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Evolution. Genes for high altitudes (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-07-03
    Description: 〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4390060/" 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/PMC4390060/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Storz, Jay F -- R01 HL087216/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 2010 Jul 2;329(5987):40-1. doi: 10.1126/science.1192481.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉School of Biological Sciences, University of Nebraska, Lincoln, NE 68588, USA. jstorz2@unl.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20595602" target="_blank"〉PubMed〈/a〉
    Keywords: *Acclimatization ; *Altitude ; Asian Continental Ancestry Group/genetics ; Basic Helix-Loop-Helix Transcription Factors/genetics ; *Biological Evolution ; Erythropoiesis ; Ethnic Groups/genetics ; Genetic Association Studies ; Genomics ; Hemoglobins/analysis ; Humans ; Hypoxia-Inducible Factor-Proline Dioxygenases ; *Oxygen/blood ; PPAR alpha/genetics ; Procollagen-Proline Dioxygenase/genetics ; *Selection, Genetic ; Signal Transduction ; *Stress, Physiological ; Tibet
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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    [This Week in Science] Tugging on Notch receptor tunes signaling (2017)
    American Association for the Advancement of Science (AAAS)
    In: Science
    Details
    Publication Date: 2017-03-25
    Description: Author: L. Bryan Ray
    Keywords: Signal Transduction
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Geosciences , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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