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  • Articles  (847)
  • Mice  (847)
  • 2005-2009  (847)
  • Physics  (847)
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  • 1
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    p53 controls radiation-induced gastrointestinal syndrome in mice independent of apoptosis (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-12-19
    Description: Acute exposure to ionizing radiation can cause lethal damage to the gastrointestinal (GI) tract, a condition called the GI syndrome. Whether the target cells affected by radiation to cause the GI syndrome are derived from the epithelium or endothelium and whether the target cells die by apoptosis or other mechanisms are controversial issues. Studying mouse models, we found that selective deletion of the proapoptotic genes Bak1 and Bax from the GI epithelium or from endothelial cells did not protect mice from developing the GI syndrome after sub-total-body gamma irradiation. In contrast, selective deletion of p53 from the GI epithelium, but not from endothelial cells, sensitized irradiated mice to the GI syndrome. Transgenic mice overexpressing p53 in all tissues were protected from the GI syndrome after irradiation. These results suggest that the GI syndrome is caused by the death of GI epithelial cells and that these epithelial cells die by a mechanism that is regulated by p53 but independent of apoptosis.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2897160/" 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/PMC2897160/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kirsch, David G -- Santiago, Philip M -- di Tomaso, Emmanuelle -- Sullivan, Julie M -- Hou, Wu-Shiun -- Dayton, Talya -- Jeffords, Laura B -- Sodha, Pooja -- Mercer, Kim L -- Cohen, Rhianna -- Takeuchi, Osamu -- Korsmeyer, Stanley J -- Bronson, Roderick T -- Kim, Carla F -- Haigis, Kevin M -- Jain, Rakesh K -- Jacks, Tyler -- K08 CA 114176/CA/NCI NIH HHS/ -- K08 CA114176/CA/NCI NIH HHS/ -- K08 CA114176-05/CA/NCI NIH HHS/ -- P01 CA080124/CA/NCI NIH HHS/ -- P01 CA080124-01A1/CA/NCI NIH HHS/ -- P01 CA80124/CA/NCI NIH HHS/ -- P30 CA014051/CA/NCI NIH HHS/ -- P30 CA014051-38/CA/NCI NIH HHS/ -- P30 DK043351/DK/NIDDK NIH HHS/ -- P30-CA14051/CA/NCI NIH HHS/ -- RC1 AI078521/AI/NIAID NIH HHS/ -- RC1 AI078521-01/AI/NIAID NIH HHS/ -- RC1-AI078521/AI/NIAID NIH HHS/ -- U19-AI06775/AI/NIAID NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2010 Jan 29;327(5965):593-6. doi: 10.1126/science.1166202. Epub 2009 Dec 17.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20019247" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Apoptosis ; Cell Death ; Epithelial Cells/cytology/physiology/radiation effects ; Gamma Rays/*adverse effects ; Gene Deletion ; Genes, p53 ; Intestinal Diseases/etiology/pathology/*physiopathology ; Intestinal Mucosa/pathology/physiopathology/*radiation effects ; Intestine, Small/pathology/physiopathology/*radiation effects ; Mesoderm/cytology ; Mice ; Mice, Transgenic ; Models, Biological ; Radiation Dosage ; Radiation Injuries/etiology/pathology/*physiopathology ; Tumor Suppressor Protein p53/*physiology ; bcl-2 Homologous Antagonist-Killer Protein/genetics/metabolism ; bcl-2-Associated X Protein/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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  • 2
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    Medicine. A reinnervating microRNA (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-12-17
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Brown, Robert H -- New York, N.Y. -- Science. 2009 Dec 11;326(5959):1494-5. doi: 10.1126/science.1183842.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Neurology, Biochemistry and Molecular Pharmacology and Program in Neuroscience, University of Massachusetts Medical School, 55 Lake Avenue North, Worcester, MA 01655, USA. robert.brown@umassmed.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20007892" target="_blank"〉PubMed〈/a〉
    Keywords: Amyotrophic Lateral Sclerosis/pathology/*physiopathology ; Animals ; Binding Sites ; Carrier Proteins/metabolism ; Disease Models, Animal ; Histone Deacetylases/metabolism ; Mice ; Mice, Transgenic ; MicroRNAs/genetics/*metabolism ; Muscle Cells/enzymology ; Muscle Denervation ; Muscle, Skeletal/innervation/metabolism ; Myostatin/genetics ; Neuromuscular Junction/*pathology/*physiology ; RNA Interference ; Sequence Analysis, RNA ; 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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    Norbin is an endogenous regulator of metabotropic glutamate receptor 5 signaling (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-12-17
    Description: Metabotropic glutamate receptor 5 (mGluR5) is highly expressed in the mammalian central nervous system (CNS). It is involved in multiple physiological functions and is a target for treatment of various CNS disorders, including schizophrenia. We report that Norbin, a neuron-specific protein, physically interacts with mGluR5 in vivo, increases the cell surface localization of the receptor, and positively regulates mGluR5 signaling. Genetic deletion of Norbin attenuates mGluR5-dependent stable changes in synaptic function measured as long-term depression or long-term potentiation of synaptic transmission in the hippocampus. As with mGluR5 knockout mice or mice treated with mGluR5-selective antagonists, Norbin knockout mice showed a behavioral phenotype associated with a rodent model of schizophrenia, as indexed by alterations both in sensorimotor gating and psychotomimetic-induced locomotor activity.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2796550/" 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/PMC2796550/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wang, Hong -- Westin, Linda -- Nong, Yi -- Birnbaum, Shari -- Bendor, Jacob -- Brismar, Hjalmar -- Nestler, Eric -- Aperia, Anita -- Flajolet, Marc -- Greengard, Paul -- DA 10044/DA/NIDA NIH HHS/ -- MH074866/MH/NIMH NIH HHS/ -- MH66172/MH/NIMH NIH HHS/ -- P01 DA010044/DA/NIDA NIH HHS/ -- P01 DA010044-020002/DA/NIDA NIH HHS/ -- P01 DA010044-030002/DA/NIDA NIH HHS/ -- P01 DA010044-04/DA/NIDA NIH HHS/ -- P01 DA010044-040002/DA/NIDA NIH HHS/ -- P01 DA010044-05/DA/NIDA NIH HHS/ -- P01 DA010044-050002/DA/NIDA NIH HHS/ -- P01 DA010044-06/DA/NIDA NIH HHS/ -- P01 DA010044-060002/DA/NIDA NIH HHS/ -- P01 DA010044-07/DA/NIDA NIH HHS/ -- P01 DA010044-070002/DA/NIDA NIH HHS/ -- P01 DA010044-08/DA/NIDA NIH HHS/ -- P01 DA010044-080002/DA/NIDA NIH HHS/ -- P01 DA010044-09/DA/NIDA NIH HHS/ -- P01 DA010044-090002/DA/NIDA NIH HHS/ -- P01 DA010044-10/DA/NIDA NIH HHS/ -- P01 DA010044-100002/DA/NIDA NIH HHS/ -- P01 DA010044-11/DA/NIDA NIH HHS/ -- P01 DA010044-110005/DA/NIDA NIH HHS/ -- P01 DA010044-12/DA/NIDA NIH HHS/ -- P01 DA010044-120005/DA/NIDA NIH HHS/ -- P01 DA010044-129002/DA/NIDA NIH HHS/ -- P01 DA010044-13/DA/NIDA NIH HHS/ -- P01 DA010044-130005/DA/NIDA NIH HHS/ -- P01 DA010044-139002/DA/NIDA NIH HHS/ -- P01 DA010044-14/DA/NIDA NIH HHS/ -- P01 DA010044-140005/DA/NIDA NIH HHS/ -- P01 DA010044-149002/DA/NIDA NIH HHS/ -- P01 DA010044-14S1/DA/NIDA NIH HHS/ -- P01 DA010044-14S10005/DA/NIDA NIH HHS/ -- P01 DA010044-14S19002/DA/NIDA NIH HHS/ -- P50 MH074866/MH/NIMH NIH HHS/ -- P50 MH074866-010001/MH/NIMH NIH HHS/ -- P50 MH074866-020001/MH/NIMH NIH HHS/ -- P50 MH074866-030001/MH/NIMH NIH HHS/ -- P50 MH074866-039001/MH/NIMH NIH HHS/ -- P50 MH074866-040001/MH/NIMH NIH HHS/ -- P50 MH074866-050001/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 2009 Dec 11;326(5959):1554-7. doi: 10.1126/science.1178496.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Molecular and Cellular Neuroscience, Rockefeller University, New York, NY 10065, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20007903" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain/*metabolism ; Calcium/metabolism ; Calcium Signaling ; Cell Line ; Cell Membrane/metabolism ; Humans ; Mice ; Mice, Knockout ; Motor Activity ; Nerve Tissue Proteins/genetics/*metabolism ; Neuronal Plasticity ; Protein Binding ; Rats ; Receptor, Metabotropic Glutamate 5 ; Receptors, Metabotropic Glutamate/genetics/*metabolism ; Reflex, Startle ; Schizophrenia/physiopathology ; *Signal Transduction ; Synaptic Transmission ; Transfection
    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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    MicroRNA-206 delays ALS progression and promotes regeneration of neuromuscular synapses in mice (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-12-17
    Description: Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disease characterized by loss of motor neurons, denervation of target muscles, muscle atrophy, and paralysis. Understanding ALS pathogenesis may require a fuller understanding of the bidirectional signaling between motor neurons and skeletal muscle fibers at neuromuscular synapses. Here, we show that a key regulator of this signaling is miR-206, a skeletal muscle-specific microRNA that is dramatically induced in a mouse model of ALS. Mice that are genetically deficient in miR-206 form normal neuromuscular synapses during development, but deficiency of miR-206 in the ALS mouse model accelerates disease progression. miR-206 is required for efficient regeneration of neuromuscular synapses after acute nerve injury, which probably accounts for its salutary effects in ALS. miR-206 mediates these effects at least in part through histone deacetylase 4 and fibroblast growth factor signaling pathways. Thus, miR-206 slows ALS progression by sensing motor neuron injury and promoting the compensatory regeneration of neuromuscular synapses.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2796560/" 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/PMC2796560/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Williams, Andrew H -- Valdez, Gregorio -- Moresi, Viviana -- Qi, Xiaoxia -- McAnally, John -- Elliott, Jeffrey L -- Bassel-Duby, Rhonda -- Sanes, Joshua R -- Olson, Eric N -- 1F32NS061464-01A1/NS/NINDS NIH HHS/ -- R01 HL093039/HL/NHLBI NIH HHS/ -- R01 HL093039-01A1/HL/NHLBI NIH HHS/ -- T32HL007360/HL/NHLBI NIH HHS/ -- U24 CA126608/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 2009 Dec 11;326(5959):1549-54. doi: 10.1126/science.1181046.〈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/20007902" target="_blank"〉PubMed〈/a〉
    Keywords: Amyotrophic Lateral Sclerosis/pathology/*physiopathology ; Animals ; Axons/physiology ; Carrier Proteins/genetics/metabolism ; Disease Models, Animal ; Disease Progression ; Fibroblast Growth Factors/metabolism ; Histone Deacetylases/genetics/metabolism ; Mice ; Mice, Transgenic ; MicroRNAs/genetics/*metabolism ; Motor Neurons/pathology/*physiology ; Muscle Denervation ; Muscle, Skeletal/innervation/*metabolism/pathology ; MyoD Protein/genetics/metabolism ; Myogenin/genetics/metabolism ; Nerve Regeneration ; Neuromuscular Junction/growth & development/*pathology/*physiology ; RNA Interference ; Signal Transduction ; Transcriptional Activation ; Up-Regulation
    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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    A spindle assembly checkpoint protein functions in prophase I arrest and prometaphase progression (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-12-08
    Description: Two critical stages of mammalian oocyte regulation are prophase I arrest, which is important for sustaining the oocyte pool, and the progression through meiosis I (MI) to produce fertilizable eggs. We have found that the spindle assembly checkpoint protein BubR1 regulates both stages in mouse oocytes. We show that oocytes depleted of BubR1 cannot sustain prophase I arrest and readily undergo germinal vesicle breakdown, a marker for reentry into MI. BubR1-depleted oocytes then arrest before completing MI, marked by failure of polar body extrusion. Both meiotic defects in BubR1-depleted oocytes are due to reduced activity of the master regulator known as the anaphase-promoting complex (APC), brought about through diminished levels of the APC coactivator Cdh1.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3428834/" 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/PMC3428834/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Homer, Hayden -- Gui, Liming -- Carroll, John -- 082587/Wellcome Trust/United Kingdom -- 082587/Z/07/Z/Wellcome Trust/United Kingdom -- G0400530/Medical Research Council/United Kingdom -- Medical Research Council/United Kingdom -- New York, N.Y. -- Science. 2009 Nov 13;326(5955):991-4. doi: 10.1126/science.1175326.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Oocyte and Embryo Research Laboratory, Department of Cell and Developmental Biology, Division of Biosciences and Institute for Women's Health, University College London, London, UK. h.homer@ucl.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19965510" target="_blank"〉PubMed〈/a〉
    Keywords: Anaphase-Promoting Complex-Cyclosome ; Animals ; Carrier Proteins/metabolism ; Cdc20 Proteins ; Cdh1 Proteins ; Cell Cycle Proteins/metabolism ; Cyclin B1/metabolism ; Female ; Gene Silencing ; Meiosis/*physiology ; Meiotic Prophase I/*physiology ; Mice ; Oocytes/*physiology ; Prometaphase/*physiology/*radiation effects ; Protein-Serine-Threonine Kinases/genetics/*metabolism ; Securin ; Ubiquitin-Protein Ligase Complexes/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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  • 6
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    Deletion of Atoh1 disrupts Sonic Hedgehog signaling in the developing cerebellum and prevents medulloblastoma (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-12-08
    Description: Granule neuron precursors (GNPs) are the most actively proliferating cells in the postnatal nervous system, and mutations in pathways that control the GNP cell cycle can result in medulloblastoma. The transcription factor Atoh1 has been suspected to contribute to GNP proliferation, but its role in normal and neoplastic postnatal cerebellar development remains unexplored. We show that Atoh1 regulates the signal transduction pathway of Sonic Hedgehog, an extracellular factor that is essential for GNP proliferation, and demonstrate that deletion of Atoh1 prevents cerebellar neoplasia in a mouse model of medulloblastoma. Our data shed light on the function of Atoh1 in postnatal cerebellar development and identify a new mechanism that can be targeted to regulate medulloblastoma formation.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3638077/" 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/PMC3638077/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Flora, Adriano -- Klisch, Tiemo J -- Schuster, Gabriele -- Zoghbi, Huda Y -- 5 P30 HD024064/HD/NICHD NIH HHS/ -- P30 HD024064/HD/NICHD NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2009 Dec 4;326(5958):1424-7. doi: 10.1126/science.1181453.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19965762" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Basic Helix-Loop-Helix Transcription Factors/*genetics/*physiology ; Cell Cycle ; Cell Differentiation ; Cell Proliferation ; Cerebellar Neoplasms/etiology/*prevention & control ; Cerebellum/cytology/growth & development/*metabolism ; Down-Regulation ; Gene Deletion ; Gene Knock-In Techniques ; Hedgehog Proteins/*metabolism ; Kruppel-Like Transcription Factors/genetics/metabolism ; Medulloblastoma/etiology/*prevention & control ; Mice ; Nerve Tissue Proteins/genetics/metabolism ; Neurons/*cytology ; Receptors, G-Protein-Coupled/genetics/physiology ; Signal Transduction
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  • 7
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    GABAergic hub neurons orchestrate synchrony in developing hippocampal networks (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-12-08
    Description: Brain function operates through the coordinated activation of neuronal assemblies. Graph theory predicts that scale-free topologies, which include "hubs" (superconnected nodes), are an effective design to orchestrate synchronization. Whether hubs are present in neuronal assemblies and coordinate network activity remains unknown. Using network dynamics imaging, online reconstruction of functional connectivity, and targeted whole-cell recordings in rats and mice, we found that developing hippocampal networks follow a scale-free topology, and we demonstrated the existence of functional hubs. Perturbation of a single hub influenced the entire network dynamics. Morphophysiological analysis revealed that hub cells are a subpopulation of gamma-aminobutyric acid-releasing (GABAergic) interneurons possessing widespread axonal arborizations. These findings establish a central role for GABAergic interneurons in shaping developing networks and help provide a conceptual framework for studying neuronal synchrony.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bonifazi, P -- Goldin, M -- Picardo, M A -- Jorquera, I -- Cattani, A -- Bianconi, G -- Represa, A -- Ben-Ari, Y -- Cossart, R -- New York, N.Y. -- Science. 2009 Dec 4;326(5958):1419-24. doi: 10.1126/science.1175509.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institut de Neurobiologie de la Mediterranee INSERM U901, Universitede la Mediterranee, Parc Scientifique de Luminy, Boite Postale 13, 13273 Marseille Cedex 9, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19965761" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Animals ; Axons/ultrastructure ; CA3 Region, Hippocampal/cytology/*physiology ; Calcium/metabolism ; Dendrites/ultrastructure ; Excitatory Postsynaptic Potentials ; Hippocampus/cytology/*physiology ; In Vitro Techniques ; Interneurons/*physiology/ultrastructure ; Mice ; Nerve Net/*physiology ; Patch-Clamp Techniques ; Pyramidal Cells/physiology ; Rats ; Rats, Wistar ; Synapses/physiology ; gamma-Aminobutyric Acid/*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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  • 8
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    Phosphorylation of H2A by Bub1 prevents chromosomal instability through localizing shugoshin (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-12-08
    Description: Bub1 is a multi-task protein kinase required for proper chromosome segregation in eukaryotes. Impairment of Bub1 in humans may lead to chromosomal instability (CIN) or tumorigenesis. Yet, the primary cellular substrate of Bub1 has remained elusive. Here, we show that Bub1 phosphorylates the conserved serine 121 of histone H2A in fission yeast Schizosaccharomyces pombe. The h2a-SA mutant, in which all cellular H2A-S121 is replaced by alanine, phenocopies the bub1 kinase-dead mutant (bub1-KD) in losing the centromeric localization of shugoshin proteins. Artificial tethering of shugoshin to centromeres largely restores the h2a-SA or bub1-KD-related CIN defects, a function that is evolutionally conserved. Thus, Bub1 kinase creates a mark for shugoshin localization and the correct partitioning of chromosomes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kawashima, Shigehiro A -- Yamagishi, Yuya -- Honda, Takashi -- Ishiguro, Kei-ichiro -- Watanabe, Yoshinori -- New York, N.Y. -- Science. 2010 Jan 8;327(5962):172-7. doi: 10.1126/science.1180189. Epub 2009 Nov 19.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Chromosome Dynamics, Institute of Molecular and Cellular Biosciences, University of Tokyo, Yayoi, Tokyo 113-0032, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19965387" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Centromere/*metabolism ; *Chromosomal Instability ; Chromosomal Proteins, Non-Histone/genetics/*metabolism ; *Chromosome Segregation ; Chromosomes, Fungal/metabolism ; Histones/*metabolism ; Humans ; Kinetochores/metabolism ; Meiosis ; Mice ; Mitosis ; Nucleosomes/metabolism ; Phosphorylation ; Protein-Serine-Threonine Kinases/genetics/*metabolism ; Recombinant Proteins/metabolism ; Saccharomyces cerevisiae/genetics/metabolism ; Saccharomyces cerevisiae Proteins/genetics/metabolism ; Schizosaccharomyces/cytology/genetics/*metabolism ; Schizosaccharomyces pombe Proteins/genetics/*metabolism ; Serine/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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  • 9
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    Hemagglutinin receptor binding avidity drives influenza A virus antigenic drift (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-11-11
    Description: Rapid antigenic evolution in the influenza A virus hemagglutinin precludes effective vaccination with existing vaccines. To understand this phenomenon, we passaged virus in mice immunized with influenza vaccine. Neutralizing antibodies selected mutants with single-amino acid hemagglutinin substitutions that increased virus binding to cell surface glycan receptors. Passaging these high-avidity binding mutants in naive mice, but not immune mice, selected for additional hemagglutinin substitutions that decreased cellular receptor binding avidity. Analyzing a panel of monoclonal antibody hemagglutinin escape mutants revealed a positive correlation between receptor binding avidity and escape from polyclonal antibodies. We propose that in response to variation in neutralizing antibody pressure between individuals, influenza A virus evolves by adjusting receptor binding avidity via amino acid substitutions throughout the hemagglutinin globular domain, many of which simultaneously alter antigenicity.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2784927/" 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/PMC2784927/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hensley, Scott E -- Das, Suman R -- Bailey, Adam L -- Schmidt, Loren M -- Hickman, Heather D -- Jayaraman, Akila -- Viswanathan, Karthik -- Raman, Rahul -- Sasisekharan, Ram -- Bennink, Jack R -- Yewdell, Jonathan W -- GM 57073/GM/NIGMS NIH HHS/ -- U54 GM62116/GM/NIGMS NIH HHS/ -- Z01 AI001014-01/Intramural NIH HHS/ -- New York, N.Y. -- Science. 2009 Oct 30;326(5953):734-6. doi: 10.1126/science.1178258.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, Bethesda, MD 20892, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19900932" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Neutralizing/immunology ; Antibodies, Viral/immunology ; Antigenic Variation/genetics/*immunology ; Cell Line ; Hemagglutinin Glycoproteins, Influenza Virus/genetics/immunology/*metabolism ; Influenza A Virus, H1N1 Subtype/genetics/*immunology ; Influenza Vaccines/immunology ; Mice ; Mice, Inbred BALB C ; Mice, Inbred C57BL ; Models, Immunological ; Mutation ; Receptors, Virus/*metabolism ; Serial Passage
    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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  • 10
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    A single peptide-MHC complex positively selects a diverse and specific CD8 T cell repertoire (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-11-07
    Description: Pathogen recognition by T cells is dependent on their exquisite specificity for self-major histocompatibility complex (MHC) molecules presenting a bound peptide. Although this specificity results from positive and negative selection of developing T cells in the thymus, the relative contribution of these two processes remains controversial. To address the relation between the selecting peptide-MHC complex and the specificity of mature T cells, we generated transgenic mice that express a single peptide-MHC class I complex. We demonstrate that positive selection of CD8 T cells in these mice results in an MHC-specific repertoire. Although selection on a single complex is peptide promiscuous, mature T cells are highly peptide specific. Thus, positive selection imparts MHC and peptide specificity on the peripheral CD8 T cell repertoire.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2828816/" 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/PMC2828816/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wang, Baomei -- Primeau, Tina M -- Myers, Nancy -- Rohrs, Henry W -- Gross, Michael L -- Lybarger, Lonnie -- Hansen, Ted H -- Connolly, Janet M -- 2P41RR000954/RR/NCRR NIH HHS/ -- AI 027568/AI/NIAID NIH HHS/ -- AI 055849/AI/NIAID NIH HHS/ -- P41 GM103422/GM/NIGMS NIH HHS/ -- P41 RR000954/RR/NCRR NIH HHS/ -- P41 RR000954-32S1/RR/NCRR NIH HHS/ -- R01 AI027568/AI/NIAID NIH HHS/ -- R01 AI027568-17/AI/NIAID NIH HHS/ -- R01 AI055849/AI/NIAID NIH HHS/ -- R01 AI055849-05/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2009 Nov 6;326(5954):871-4. doi: 10.1126/science.1177627.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19892989" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; CD8-Positive T-Lymphocytes/*immunology ; Cross Reactions ; Cytotoxicity, Immunologic ; H-2 Antigens/genetics/*immunology ; Lymphocyte Activation ; Major Histocompatibility Complex/*immunology ; Mice ; Mice, Knockout ; Mice, Transgenic ; Ovalbumin/immunology ; Peptides/*immunology ; Protein Multimerization ; Spleen/cytology/immunology ; T-Lymphocytes, Cytotoxic/*immunology ; Thymus Gland/cytology/immunology ; Vesiculovirus/immunology
    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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