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  • Life and Medical Sciences
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  • American Association for the Advancement of Science (AAAS)  (44)
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  • American Association for the Advancement of Science (AAAS)  (44)
  • American Chemical Society
  • American Meteorological Society
  • Blackwell Publishing Ltd
  • International Union of Crystallography
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  • 2020-2022
  • 2010-2014
  • 2000-2004  (44)
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  • 1
    Publication Date: 2003-06-28
    Description: In the mammalian CNS, N-methyl-D-aspartate (NMDA) receptors serve prominent roles in many physiological and pathophysiological processes including pain transmission. For full activation, NMDA receptors require the binding of glycine. It is not known whether the brain uses changes in extracellular glycine to modulate synaptic NMDA responses. Here, we show that synaptically released glycine facilitates NMDA receptor currents in the superficial dorsal horn, an area critically involved in pain processing. During high presynaptic activity, glycine released from inhibitory interneurons escapes the synaptic cleft and reaches nearby NMDA receptors by so-called spillover. In vivo, this process may contribute to the development of inflammatory hyperalgesia.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ahmadi, Seifollah -- Muth-Selbach, Uta -- Lauterbach, Andreas -- Lipfert, Peter -- Neuhuber, Winfried L -- Zeilhofer, Hanns Ulrich -- New York, N.Y. -- Science. 2003 Jun 27;300(5628):2094-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institut fur Experimentelle und Klinische Pharmakologie und Toxikologie, Universitat Erlangen-Nurnberg, Fahrstrasse 17, D-91054 Erlangen, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12829784" target="_blank"〉PubMed〈/a〉
    Keywords: Analgesics/pharmacology ; Animals ; Anterior Horn Cells/drug effects/metabolism ; Diffusion ; Electric Stimulation ; Evoked Potentials/drug effects ; Excitatory Postsynaptic Potentials/drug effects ; Glycine/*metabolism/pharmacology ; In Vitro Techniques ; Interneurons/metabolism ; Neural Inhibition/drug effects ; Opioid Peptides/pharmacology ; Pain Measurement ; Patch-Clamp Techniques ; Posterior Horn Cells/drug effects/*metabolism ; Rats ; Rats, Sprague-Dawley ; Receptors, N-Methyl-D-Aspartate/*metabolism ; Serine/pharmacology ; Spinal Cord/drug effects/metabolism ; Synapses/*metabolism ; *Synaptic Transmission/drug effects ; Temperature
    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
    Publication Date: 2003-11-01
    Description: Mutations in MeCP2, which encodes a protein that has been proposed to function as a global transcriptional repressor, are the cause of Rett syndrome (RT T), an X-linked progressive neurological disorder. Although the selective inactivation of MeCP2 in neurons is sufficient to confer a Rett-like phenotype in mice, the specific functions of MeCP2 in postmitotic neurons are not known. We find that MeCP2 binds selectively to BDNF promoter III and functions to repress expression of the BDNF gene. Membrane depolarization triggers the calcium-dependent phosphorylation and release of MeCP2 from BDNF promoter III, thereby facilitating transcription. These studies indicate that MeCP2 plays a key role in the control of neuronal activity-dependent gene regulation and suggest that the deregulation of this process may underlie the pathology of RT T.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chen, Wen G -- Chang, Qiang -- Lin, Yingxi -- Meissner, Alexander -- West, Anne E -- Griffith, Eric C -- Jaenisch, Rudolf -- Greenberg, Michael E -- HD 18655/HD/NICHD NIH HHS/ -- NS28829/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 2003 Oct 31;302(5646):885-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Neuroscience, Children's Hospital, Harvard Medical School, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/14593183" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain-Derived Neurotrophic Factor/*genetics ; Calcium/*metabolism ; Cell Membrane/physiology ; Cells, Cultured ; *Chromosomal Proteins, Non-Histone ; Cloning, Molecular ; CpG Islands ; DNA Methylation ; DNA-Binding Proteins/*metabolism ; Electrophoretic Mobility Shift Assay ; *Gene Expression Regulation ; Gene Silencing ; Histones/metabolism ; Methyl-CpG-Binding Protein 2 ; Methylation ; Mice ; Mice, Knockout ; Neurons/metabolism/physiology ; Phosphorylation ; Potassium Chloride/pharmacology ; Precipitin Tests ; Promoter Regions, Genetic ; Rats ; *Repressor Proteins ; Rett Syndrome/genetics ; *Transcription, Genetic
    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
    Publication Date: 2003-03-08
    Description: The mechanisms underlying experience-dependent plasticity in the brain may depend on the AMPA subclass of glutamate receptors (AMPA-Rs). We examined the trafficking of AMPA-Rs into synapses in the developing rat barrel cortex. In vivo gene delivery was combined with in vitro recordings to show that experience drives recombinant GluR1, an AMPA-R subunit, into synapses formed between layer 4 and layer 2/3 neurons. Moreover, expression of the GluR1 cytoplasmic tail, a construct that inhibits synaptic delivery of endogenous AMPA-Rs during long-term potentiation, blocked experience-driven synaptic potentiation. In general, synaptic incorporation of AMPA-Rs in vivo conforms to rules identified in vitro and contributes to plasticity driven by natural stimuli in the mammalian brain.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Takahashi, Takuya -- Svoboda, Karel -- Malinow, Roberto -- NS032827/NS/NINDS NIH HHS/ -- NS038259/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 2003 Mar 7;299(5612):1585-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Jones Laboratory, Cold Spring Harbor Laboratory, Cold Spring Harbor, NY 11724, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12624270" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Electrophysiology ; Gene Transfer Techniques ; Long-Term Potentiation ; *Neuronal Plasticity ; Neurons/*metabolism/virology ; Patch-Clamp Techniques ; Rats ; Receptors, AMPA/genetics/*metabolism ; Recombinant Fusion Proteins/metabolism ; Sindbis Virus/genetics ; Somatosensory Cortex/*metabolism/virology ; Synapses/*metabolism ; *Synaptic Transmission ; Touch ; Vibrissae/physiology
    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
    Publication Date: 2003-11-15
    Description: Cranial radiation therapy causes a progressive decline in cognitive function that is linked to impaired neurogenesis. Chronic inflammation accompanies radiation injury, suggesting that inflammatory processes may contribute to neural stem cell dysfunction. Here, we show that neuroinflammation alone inhibits neurogenesis and that inflammatory blockade with indomethacin, a common nonsteroidal anti-inflammatory drug, restores neurogenesis after endotoxin-induced inflammation and augments neurogenesis after cranial irradiation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Monje, Michelle L -- Toda, Hiroki -- Palmer, Theo D -- F30 NS04696701/NS/NINDS NIH HHS/ -- MH20016-05/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 2003 Dec 5;302(5651):1760-5. Epub 2003 Nov 13.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Stanford University, Department of Neurosurgery, MSLS P309, Mail Code 5487, 1201 Welch Road, Stanford, CA 94305-5487, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/14615545" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anti-Inflammatory Agents, Non-Steroidal/pharmacology ; Antigens, CD/metabolism ; Apoptosis ; Cell Differentiation ; Cells, Cultured ; Coculture Techniques ; Culture Media, Conditioned ; Cytokine Receptor gp130 ; Cytokines/physiology ; Dentate Gyrus/cytology/drug effects/physiology/radiation effects ; Female ; Gamma Rays ; Hippocampus/cytology/drug effects/*physiology/radiation effects ; In Situ Nick-End Labeling ; Indomethacin/*pharmacology ; Inflammation/drug therapy/*physiopathology ; Interleukin-6/pharmacology/physiology ; Lipopolysaccharides/pharmacology ; Membrane Glycoproteins/metabolism ; Mice ; Microglia/*physiology ; Mitotic Index ; Neurons/drug effects/*physiology/radiation effects ; Rats ; Rats, Inbred F344 ; Receptors, Interleukin-6/metabolism ; Recombinant Proteins/pharmacology ; Signal Transduction ; Stem Cells/physiology
    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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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2003-05-31
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mourier, Tobias -- Jeffares, Daniel C -- New York, N.Y. -- Science. 2003 May 30;300(5624):1393.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Evolutionary Biology, Zoological Institute, University of Copenhagen, Universitetsparken 15, DK-2100 Copenhagen O, Denmark. tmourier@zi.ku.dk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12775832" target="_blank"〉PubMed〈/a〉
    Keywords: Angiosperms/genetics ; Animals ; Caenorhabditis elegans/genetics ; DNA, Complementary/genetics ; Eukaryota/genetics ; *Eukaryotic Cells ; Fungi/genetics ; Humans ; Insects/genetics ; Interspersed Repetitive Sequences ; *Introns ; Mice ; Plasmodium/genetics ; RNA-Directed DNA Polymerase/metabolism ; Rats ; *Recombination, Genetic ; Takifugu/genetics ; Templates, Genetic
    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
    Publication Date: 2003-06-07
    Description: Insulin resistance is a major hallmark in the development of type II diabetes, which is characterized by the failure of insulin to promote glucose uptake in muscle and to suppress glucose production in liver. The serine-threonine kinase Akt (PKB) is a principal target of insulin signaling that inhibits hepatic glucose output when glucose is available from food. Here we show that TRB3, a mammalian homolog of Drosophila tribbles, functions as a negative modulator of Akt. TRB3 expression is induced in liver under fasting conditions, and TRB3 disrupts insulin signaling by binding directly to Akt and blocking activation of the kinase. Amounts of TRB3 RNA and protein were increased in livers of db/db diabetic mice compared with those in wild-type mice. Hepatic overexpression of TRB3 in amounts comparable to those in db/db mice promoted hyperglycemia and glucose intolerance. Our results suggest that, by interfering with Akt activation, TRB3 contributes to insulin resistance in individuals with susceptibility to type II diabetes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Du, Keyong -- Herzig, Stephan -- Kulkarni, Rohit N -- Montminy, Marc -- New York, N.Y. -- Science. 2003 Jun 6;300(5625):1574-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Peptide Biology Laboratories, Salk Institute for Biological Studies, 10010 North Torrey Pines Road, La Jolla, CA 92037-1002, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12791994" target="_blank"〉PubMed〈/a〉
    Keywords: Adenoviridae/genetics/physiology ; Amino Acid Substitution ; Animals ; Blood Glucose/metabolism ; Cell Cycle Proteins/genetics/*metabolism ; Cell Line ; Diabetes Mellitus/genetics/metabolism ; Enzyme Activation ; Fasting ; Genetic Vectors ; Glucose/metabolism ; Glucose Intolerance ; Glycogen Synthase Kinase 3/metabolism ; Humans ; Insulin/blood/*metabolism ; Insulin Resistance ; Insulin-Like Growth Factor I/pharmacology ; Liver/*metabolism ; Male ; Mice ; Mice, Inbred C57BL ; Phosphorylation ; Polymerase Chain Reaction ; Protein-Serine-Threonine Kinases/metabolism ; Proto-Oncogene Proteins/*metabolism ; Proto-Oncogene Proteins c-akt ; RNA Interference ; Rats ; Repressor Proteins ; Signal Transduction ; Transfection ; Transgenes ; Tumor Cells, Cultured ; Two-Hybrid System Techniques
    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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  • 7
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2003-11-25
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Miller, Greg -- New York, N.Y. -- Science. 2003 Nov 21;302(5649):1321.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/14631016" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Behavior Therapy ; Combined Modality Therapy ; Controlled Clinical Trials as Topic ; Cycloserine/*therapeutic use ; *Fear ; Humans ; Learning ; Phobic Disorders/*therapy ; Rats ; Receptors, N-Methyl-D-Aspartate/agonists/*metabolism ; *User-Computer Interface
    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
    Publication Date: 2003-08-23
    Description: In memory consolidation, the memory trace stabilizes and becomes resistant to certain amnesic agents. The textbook account is that for any memorized item, consolidation starts and ends just once. However, evidence has accumulated that upon activation in retrieval, the trace may reconsolidate. Whereas some authors reported transient renewed susceptibility of retrieved memories to consolidation blockers, others could not detect it. Here, we report that in both conditioned taste aversion in the rat and fear conditioning in the medaka fish, the stability of retrieved memory is inversely correlated with the control of behavior by that memory. This result may explain some conflicting findings on reconsolidation of activated memories.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Eisenberg, Mark -- Kobilo, Tali -- Berman, Diego E -- Dudai, Yadin -- New York, N.Y. -- Science. 2003 Aug 22;301(5636):1102-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurobiology, Weizmann Institute of Science, Rehovot 76100, Israel.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12934010" target="_blank"〉PubMed〈/a〉
    Keywords: Aminobenzoates/pharmacology ; Analysis of Variance ; Animals ; Anisomycin/administration & dosage/pharmacology ; Avoidance Learning ; Cerebral Cortex/drug effects ; Conditioning (Psychology) ; Cues ; Electroshock ; *Extinction, Psychological/drug effects ; Fear ; Male ; *Memory ; *Mental Recall ; Oryzias ; Rats ; Rats, Wistar ; Taste ; meta-Aminobenzoates
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 9
    Publication Date: 2003-04-26
    Description: Block copolymer micelles are water-soluble biocompatible nanocontainers with great potential for delivering hydrophobic drugs. An understanding of their cellular distribution is essential to achieving selective delivery of drugs at the subcellular level. Triple-labeling confocal microscopy in live cells revealed the localization of micelles in several cytoplasmic organelles, including mitochondria, but not in the nucleus. Moreover, micelles change the cellular distribution of and increase the amount of the agent delivered to the cells. These micelles may thus be worth exploring for their potential to selectively deliver drugs to specified subcellular targets.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Savic, Radoslav -- Luo, Laibin -- Eisenberg, Adi -- Maysinger, Dusica -- New York, N.Y. -- Science. 2003 Apr 25;300(5619):615-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pharmacology and Therapeutics, McGill University, Montreal, QC, H3G 1Y6, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12714738" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Azides/chemistry ; Biocompatible Materials ; Cell Nucleus/metabolism ; Cytoplasm/*metabolism ; Diffusion ; Drug Carriers/chemistry/*metabolism ; Endoplasmic Reticulum/metabolism ; Ethylene Oxide/chemistry/metabolism ; Fluoresceins ; Fluorescence ; Golgi Apparatus/metabolism ; Hydrophobic and Hydrophilic Interactions ; Lactones/chemistry/metabolism ; Lysosomes/metabolism ; *Micelles ; Microscopy, Confocal ; Microscopy, Fluorescence ; Mitochondria/metabolism ; *Nanotechnology ; Organelles/*metabolism ; PC12 Cells ; Polyethylene Glycols/chemistry ; Polymers/chemistry/metabolism ; Rats ; Rhodamines/chemistry ; Solubility ; Spectrometry, Fluorescence
    Print ISSN: 0036-8075
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  • 10
    Publication Date: 2003-07-19
    Description: Glucokinase (GK) plays a key role in whole-body glucose homeostasis by catalyzing the phosphorylation of glucose in cells that express this enzyme, such as pancreatic beta cells and hepatocytes. We describe a class of antidiabetic agents that act as nonessential, mixed-type GK activators (GKAs) that increase the glucose affinity and maximum velocity (Vmax) of GK. GKAs augment both hepatic glucose metabolism and glucose-induced insulin secretion from isolated rodent pancreatic islets, consistent with the expression and function of GK in both cell types. In several rodent models of type 2 diabetes mellitus, GKAs lowered blood glucose levels, improved the results of glucose tolerance tests, and increased hepatic glucose uptake. These findings may lead to the development of new drug therapies for diabetes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Grimsby, Joseph -- Sarabu, Ramakanth -- Corbett, Wendy L -- Haynes, Nancy-Ellen -- Bizzarro, Fred T -- Coffey, John W -- Guertin, Kevin R -- Hilliard, Darryl W -- Kester, Robert F -- Mahaney, Paige E -- Marcus, Linda -- Qi, Lida -- Spence, Cheryl L -- Tengi, John -- Magnuson, Mark A -- Chu, Chang An -- Dvorozniak, Mark T -- Matschinsky, Franz M -- Grippo, Joseph F -- New York, N.Y. -- Science. 2003 Jul 18;301(5631):370-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Metabolic Diseases, Hoffmann-La Roche Inc., Nutley, NJ 07110, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12869762" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptor Proteins, Signal Transducing ; Allosteric Regulation ; Animals ; Blood Glucose/metabolism ; *Carrier Proteins ; Diabetes Mellitus, Type 2/*drug therapy/metabolism ; Dose-Response Relationship, Drug ; Drug Evaluation, Preclinical ; Enzyme Activation ; Enzyme Activators/chemistry/pharmacology ; Glucokinase/*metabolism ; Glucose/*metabolism ; Glucose Tolerance Test ; Homeostasis ; Humans ; Hypoglycemic Agents/chemistry/pharmacology ; Insulin/blood/*secretion ; Islets of Langerhans/*drug effects/secretion ; Keto Acids/metabolism ; Liver/*drug effects/metabolism ; Liver Glycogen/biosynthesis ; Male ; Mice ; Mice, Inbred C57BL ; Mice, Obese ; Proteins/metabolism/pharmacology ; Rats ; Rats, Wistar ; Recombinant Proteins/metabolism ; Stereoisomerism ; Thiazoles/chemistry/*pharmacology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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