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    GlyR alpha3: an essential target for spinal PGE2-mediated inflammatory pain sensitization (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-05-08
    Description: Prostaglandin E2 (PGE2) is a crucial mediator of inflammatory pain sensitization. Here, we demonstrate that inhibition of a specific glycine receptor subtype (GlyR alpha3) by PGE2-induced receptor phosphorylation underlies central inflammatory pain sensitization. We show that GlyR alpha3 is distinctly expressed in superficial layers of the spinal cord dorsal horn. Mice deficient in GlyR alpha3 not only lack the inhibition of glycinergic neurotransmission by PGE2 seen in wild-type mice but also show a reduction in pain sensitization induced by spinal PGE2 injection or peripheral inflammation. Thus, GlyR alpha3 may provide a previously unrecognized molecular target in pain therapy.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Harvey, Robert J -- Depner, Ulrike B -- Wassle, Heinz -- Ahmadi, Seifollah -- Heindl, Cornelia -- Reinold, Heiko -- Smart, Trevor G -- Harvey, Kirsten -- Schutz, Burkhard -- Abo-Salem, Osama M -- Zimmer, Andreas -- Poisbeau, Pierrick -- Welzl, Hans -- Wolfer, David P -- Betz, Heinrich -- Zeilhofer, Hanns Ulrich -- Muller, Ulrike -- New York, N.Y. -- Science. 2004 May 7;304(5672):884-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pharmacology, The School of Pharmacy, London WC1N 1AX, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15131310" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Cell Line ; Cyclic AMP-Dependent Protein Kinases/metabolism ; Dinoprostone/administration & dosage/*metabolism/pharmacology ; Female ; Freund's Adjuvant ; Glycine/metabolism ; Humans ; Inflammation/metabolism/*physiopathology ; Male ; Mice ; Mice, Knockout ; Molecular Sequence Data ; Neurons/metabolism ; Pain/*physiopathology ; Patch-Clamp Techniques ; Phosphorylation ; Posterior Horn Cells/*metabolism ; Receptors, Glycine/chemistry/genetics/*metabolism ; Signal Transduction ; Spinal Cord/*metabolism ; Synaptic Transmission ; Transfection ; Zymosan
    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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    Functional modulation of GABAA receptors by cAMP-dependent protein phosphorylation (1992)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1992-07-31
    Description: gamma-Aminobutyric acidA (GABAA) receptors are ligand-gated ion channels that mediate inhibitory synaptic transmission in the central nervous system. The role of protein phosphorylation in the modulation of GABAA receptor function was examined with cells transiently transfected with GABAA receptor subunits. GABAA receptors consisting of the alpha 1 and beta 1 or the alpha 1, beta 1, and gamma 2 subunits were directly phosphorylated on the beta 1 subunit by adenosine 3',5'-monophosphate (cAMP)-dependent protein kinase (PKA). The phosphorylation decreased the amplitude of the GABA response of both receptor types and the extent of rapid desensitization of the GABAA receptor that consisted of the alpha 1 and beta 1 subunits. Site-specific mutagenesis of the serine residue phosphorylated by PKA completely eliminated the PKA phosphorylation and modulation of the GABAA receptor. In primary embryonic rat neuronal cell cultures, a similar regulation of GABAA receptors by PKA was observed. These results demonstrate that the GABAA receptor is directly modulated by protein phosphorylation and suggest that neurotransmitters or neuropeptides that regulate intracellular cAMP levels may modulate the responses of neurons to GABA and consequently have profound effects on synaptic excitability.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Moss, S J -- Smart, T G -- Blackstone, C D -- Huganir, R L -- Wellcome Trust/United Kingdom -- New York, N.Y. -- Science. 1992 Jul 31;257(5070):661-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neuroscience, Howard Hughes Medical Institute, Johns Hopkins University School of Medicine, Baltimore, MD 21205.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1323140" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Cells, Cultured ; Colforsin/pharmacology ; Cyclic AMP/*pharmacology ; Electric Conductivity ; Immunosorbent Techniques ; Kinetics ; Mice ; Mutagenesis, Site-Directed ; Neurons/drug effects/physiology ; Peptide Mapping ; Phosphorylation ; Protein Kinases/*metabolism ; Rats ; Receptors, GABA-A/genetics/*physiology ; Recombinant Proteins/physiology ; Transfection ; Zinc/pharmacology ; gamma-Aminobutyric Acid/pharmacology
    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)
    Location Call Number Expected Availability
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