Journal
NEUROPHARMACOLOGY
Volume 136, Issue -, Pages 3-9Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.neuropharm.2017.11.006
Keywords
Sympathetic ganglion; Sensory ganglia; Neuroglial cells; GABA uptake; GABA release; GABA-A receptor; GABA depolarization
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Funding
- UK Medical Research Council (MRC)
- American Medical Association Education and Research Foundation
- UK MRC
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Before discovering the GABA-B receptor, Norman Bowery completed a series of studies on an extra synaptic or asynaptic GABA system in the rat superior cervical sympathetic ganglion. First, he discovered an uptake system for GABA in neuroglial cells in the ganglia and in peripheral nerves, with a different substrate specificity than that in neurons. Second, he showed that accumulated GABA in sympathetic glial cells was metabolized to succinate by a transaminase enzyme. Third, he provided detailed structure-activity information about compounds activating an extrasynaptic GABA-A receptor on neurons in the rat sympathetic ganglion. Fourth, he showed that some amino acid substrates for the neuroglial transporter could indirectly stimulate neurons by releasing GABA from adjacent glial cells, and that GABA could also be released from neuroglial cells by membrane depolarization. In this review, these discoveries are briefly described and updated and some of their implications assessed. This article is part of the Special Issue Dedicated to Norman G. Bowery. (C) 2017 Elsevier Ltd. All rights reserved.
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