A model for an estimate in vivo of the ionic basis of presynaptic inhibition: an intracellular analysis of the GABA-induced depolarization in rat dorsal root ganglia
1976; Elsevier BV; Volume: 118; Issue: 3 Linguagem: Inglês
10.1016/0006-8993(76)90318-8
ISSN1872-6240
AutoresMartin Deschênes, P. Feltz, Y. Lamour,
Tópico(s)Photoreceptor and optogenetics research
ResumoBefore discovering the GABA-B receptor, Norman Bowery completed a series of studies on an extrasynaptic 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”.
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