Specific antagonism of GABA-mediated postsynaptic inhibition in cultured mammalian spinal cord neurons: a common mode of convulsant action.

Abstract:

:Mammalian spinal neurons grown in tissue culture were used to study the effects of the four convulsants-penicillin, pentylenetetrazol, picrotoxin, and bicuculline-on these neurons' responses to amino acids. Bath application of all four convulsants produced paroxysmal depolarizing events in the neurons; iontophoresis of the four convulsants selectively depressed responses produced by iontophoresis of the putative inhibitory transmitter GABA, and effected this depression without altering either inhibitory responses to beta-alanine or glycine, or excitation mediated by glutamate. These results support the hypothesis that the convulsant activity of these agents comes in part from selective antagonism of GABA-mediated postsynaptic inhibition.

journal_name

Neurology

journal_title

Neurology

authors

Macdonald RL,Barker JL

doi

10.1212/wnl.28.4.325

subject

Has Abstract

pub_date

1978-04-01 00:00:00

pages

325-30

issue

4

eissn

0028-3878

issn

1526-632X

journal_volume

28

pub_type

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