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  • American Association for the Advancement of Science (AAAS)  (7)
  • 1995-1999  (5)
  • 1980-1984  (2)
  • 1
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    Role of heteromer formation in GABAB receptor function (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-01-05
    Description: Recently, GBR1, a seven-transmembrane domain protein with high affinity for gamma-aminobutyric acid (GABA)B receptor antagonists, was identified. Here, a GBR1-related protein, GBR2, was shown to be coexpressed with GBR1 in many brain regions and to interact with it through a short domain in the carboxyl-terminal cytoplasmic tail. Heterologously expressed GBR2 mediated inhibition of adenylyl cyclase; however, inwardly rectifying potassium channels were activated by GABAB receptor agonists only upon coexpression with GBR1 and GBR2. Thus, the interaction of these receptors appears to be crucial for important physiological effects of GABA and provides a mechanism in receptor signaling pathways that involve a heterotrimeric GTP-binding protein.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kuner, R -- Kohr, G -- Grunewald, S -- Eisenhardt, G -- Bach, A -- Kornau, H C -- New York, N.Y. -- Science. 1999 Jan 1;283(5398):74-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉BASF-LYNX Bioscience AG, Department of Neuroscience, Im Neuenheimer Feld 515, D-69120 Heidelberg, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9872744" target="_blank"〉PubMed〈/a〉
    Keywords: Adenylyl Cyclase Inhibitors ; Amino Acid Sequence ; Animals ; Brain/*metabolism ; Cell Line ; Cyclic AMP/metabolism ; Dimerization ; G Protein-Coupled Inwardly-Rectifying Potassium Channels ; GABA-B Receptor Agonists ; Humans ; In Situ Hybridization ; Molecular Sequence Data ; Neurons/metabolism ; Potassium/metabolism ; Potassium Channels/metabolism ; *Potassium Channels, Inwardly Rectifying ; RNA, Messenger/genetics/metabolism ; Rats ; Receptors, GABA/*chemistry/*metabolism ; Receptors, GABA-B/*chemistry/*metabolism ; Recombinant Fusion Proteins/chemistry/metabolism ; Sequence Alignment
    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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  • 2
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    The tetrameric structure of a glutamate receptor channel (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-06-11
    Description: The subunit stoichiometry of several ligand-gated ion channel receptors is still unknown. A counting method was developed to determine the number of subunits in one family of brain glutamate receptors. Successful application of this method in an HEK cell line provides evidence that ionotropic glutamate receptors share a tetrameric structure with the voltage-gated potassium channels. The average conductance of these channels depends on how many subunits are occupied by an agonist.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rosenmund, C -- Stern-Bach, Y -- Stevens, C F -- NS 12961/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1998 Jun 5;280(5369):1596-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Workgroup Cellular Neurobiology, Max-Planck-Institute for Biophysical Chemistry, Gottingen, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9616121" target="_blank"〉PubMed〈/a〉
    Keywords: Binding Sites ; Cell Line ; Electric Conductivity ; Excitatory Amino Acid Agonists/metabolism ; Excitatory Amino Acid Antagonists/metabolism ; Humans ; Ligands ; Macromolecular Substances ; Models, Biological ; Patch-Clamp Techniques ; Quinoxalines/metabolism ; Quisqualic Acid/metabolism ; Receptors, AMPA/agonists/antagonists & inhibitors/*chemistry/*metabolism ; Receptors, Glutamate/chemistry/metabolism ; Receptors, Kainic Acid/agonists/antagonists & inhibitors/*chemistry/metabolism ; Recombinant Fusion Proteins/chemistry/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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  • 3
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    Radio Frequency Signals in Jupiter's Atmosphere (1996)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1996-05-10
    Description: During the Galileo probe's descent through Jupiter's atmosphere, under the ionosphere, the lightning and radio emission detector measured radio frequency signals at levels significantly above the probe's electromagnetic noise. The signal strengths at 3 and 15 kilohertz were relatively large at the beginning of the descent, decreased with depth to a pressure level of about 5 bars, and then increased slowly until the end of the mission. The 15-kilohertz signals show arrival direction anisotropies. Measurements of radio frequency wave forms show that the probe passed through an atmospheric region that did not support lightning within at least 100 kilometers and more likely a few thousand kilometers of the descent trajectory. The apparent opacity of the jovian atmosphere increases sharply at pressures greater than about 4 bars.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lanzerotti -- Rinnert -- Dehmel -- Gliem -- Krider -- Uman -- Bach -- New York, N.Y. -- Science. 1996 May 10;272(5263):858-60.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉L. J. Lanzerotti, Bell Laboratories, Lucent Technologies, Murray Hill, NJ 07974, and the University of Florida, Gainesville, FL 32611, USA. K. Rinnert, Max-Planck-Institut fur Aeronomy, D-37191 Katlenburg-Lindau, Germany. G. Dehmel, F. O. Gliem, J. Bach, Universitat Braunschweig, D-38106 Braunschweig, Germany. E. P. Krider, University of Arizona, Tucson, AZ 85721, USA. M. A. Uman, University of Florida, Gainesville, FL 32611, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8662576" target="_blank"〉PubMed〈/a〉
    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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    Ligand-induced autoregulation of IFN-gamma receptor beta chain expression in T helper cell subsets (1995)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1995-11-17
    Description: Interferon gamma (IFN-gamma) responsiveness in certain cells depends on the state of cellular differentiation or activation. Here an in vitro developmental system was used to show that IFN-gamma produced during generation of the CD4+ T helper cell type 1 (TH1) subset extinguishes expression of the IFN-gamma receptor beta subunit, resulting in TH1 cells that are unresponsive to IFN-gamma. This beta chain loss also occurred in IFN-gamma-treated TH2 cells and thus represents a specific response of CD4+ T cells to IFN-gamma rather than a TH1-specific differentiation event. These results define a mechanism of cellular desensitization where a cytokine down-regulates expression of a receptor subunit required primarily for signaling and not ligand binding.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bach, E A -- Szabo, S J -- Dighe, A S -- Ashkenazi, A -- Aguet, M -- Murphy, K M -- Schreiber, R D -- New York, N.Y. -- Science. 1995 Nov 17;270(5239):1215-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for 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/7502050" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, CD/*biosynthesis ; Cell Differentiation ; Cell Line ; Cytokines/biosynthesis ; Down-Regulation ; Gene Expression ; Genes, MHC Class I ; Interferon-gamma/*pharmacology ; Ligands ; Mice ; Mice, Transgenic ; Receptors, Interferon/*biosynthesis ; Th1 Cells/cytology/immunology/*metabolism ; Th2 Cells/cytology/immunology/*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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  • 5
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    Control of memory formation through regulated expression of a CaMKII transgene (1996)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1996-12-06
    Description: One of the major limitations in the use of genetically modified mice for studying cognitive functions is the lack of regional and temporal control of gene function. To overcome these limitations, a forebrain-specific promoter was combined with the tetracycline transactivator system to achieve both regional and temporal control of transgene expression. Expression of an activated calcium-independent form of calcium-calmodulin-dependent kinase II (CaMKII) resulted in a loss of hippocampal long-term potentiation in response to 10-hertz stimulation and a deficit in spatial memory, a form of explicit memory. Suppression of transgene expression reversed both the physiological and the memory deficit. When the transgene was expressed at high levels in the lateral amygdala and the striatum but not other forebrain structures, there was a deficit in fear conditioning, an implicit memory task, that also was reversible. Thus, the CaMKII signaling pathway is critical for both explicit and implicit memory storage, in a manner that is independent of its potential role in development.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mayford, M -- Bach, M E -- Huang, Y Y -- Wang, L -- Hawkins, R D -- Kandel, E R -- New York, N.Y. -- Science. 1996 Dec 6;274(5293):1678-83.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Neurobiology and Behavior, College of Physicians and Surgeons of Columbia University, and Howard Hughes Medical Institute, 722 West 168 Street, New York, NY 10032, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8939850" target="_blank"〉PubMed〈/a〉
    Keywords: Amygdala/physiology ; Animals ; Brain/*physiology ; Calcium-Calmodulin-Dependent Protein Kinase Type 2 ; Calcium-Calmodulin-Dependent Protein Kinases/genetics/*metabolism ; Conditioning (Psychology) ; Corpus Striatum/physiology ; Doxycycline/pharmacology ; Fear ; *Gene Expression Regulation, Enzymologic ; Genes, Reporter ; Hippocampus/physiology ; Long-Term Potentiation ; Maze Learning ; Memory/*physiology ; Mice ; Mice, Inbred C57BL ; Mice, Transgenic ; Neuronal Plasticity ; Promoter Regions, Genetic ; Prosencephalon/physiology ; Signal Transduction ; Transgenes
    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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    Histocompatibility and isoenzyme differences in commercially supplied "BALB/c" mice (1982)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1982-07-23
    Description: BALB/c mice obtained commercially were found to differ significantly from the standard phenotype of BALB/c strain mice. Isoenzyme tests and H-2 haplotype analyses indicated that the majority of mice from two of the three sources tested appeared mixed, frequently heterozygous, and did not consistently express either the expected H-2 or glucose phosphate isomerase type.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kahan, B -- Auerbach, R -- Alter, B J -- Bach, F H -- New York, N.Y. -- Science. 1982 Jul 23;217(4557):379-81.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6953593" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cytotoxicity Tests, Immunologic ; Female ; Flow Cytometry ; Genetic Markers ; Glucose-6-Phosphate Isomerase/genetics ; H-2 Antigens/genetics/immunology ; Inbreeding ; Lymphocytes/immunology ; Male ; Mice ; Mice, Inbred BALB C/*genetics ; Phenotype
    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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    H-2 antigen class: effect on mouse islet allograft rejection (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-03-18
    Description: Rejection of mouse pancreatic islet allografts occurred in a high percentage of donor recipient combinations identical for H-21-region antigens and differing at H-2K and H-2K + H-2D without I-region disparities. The results suggest that disparities in major histocompatibility complex antigens of class I (H-2K and H-2D) alone are capable of eliciting islet allograft rejection, and that lack of a stimulus from class II (I-region) alloantigens does not ensure permanent islet allograft survival.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Morrow, C E -- Sutherland, D E -- Steffes, M W -- Najarian, J S -- Bach, F H -- AI 18326/AI/NIAID NIH HHS/ -- AI/GM 17687/AI/NIAID NIH HHS/ -- AM 13083/AM/NIADDK NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1983 Mar 18;219(4590):1337-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6402817" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Graft Rejection ; H-2 Antigens/*immunology ; Histocompatibility Antigens Class II/*immunology ; *Islets of Langerhans Transplantation ; Major Histocompatibility Complex ; Mice ; T-Lymphocytes/immunology
    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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