Frequency-dependent enhancement of hippocampal inhibition by GABA uptake blockers.

Abstract:

:The effects of GABA uptake inhibitors, SKF 89976A and SKF 100330A, on recurrent inhibition were studied in the rat hippocampal slice preparation by the antidromic-orthodromic stimulation test. Population spikes evoked orthodromically by stimulation of the stratum radiatum and recorded in the CA1 pyramidal cell body layer were inhibited antidromically by stimulation of the alveus by a single pulse or by a train of pulses, either at low or at high frequency. Low frequency train conditioning produced less inhibition than a single pulse. The uptake blockers had no effect or slightly enhanced the inhibition produced by single stimuli or low frequency trains. High frequency train conditioning produced more and much longer inhibition than a single pulse. This inhibition was further substantially enhanced and prolonged by the drugs. Frequency-dependent enhancement of inhibition may be responsible for suppression of epileptiform discharges by GABA uptake blockers.

journal_name

Epilepsy Res

journal_title

Epilepsy research

authors

Capek R,Esplin B

doi

10.1016/0920-1211(93)90026-4

subject

Has Abstract

pub_date

1993-10-01 00:00:00

pages

123-30

issue

2

eissn

0920-1211

issn

1872-6844

pii

0920-1211(93)90026-4

journal_volume

16

pub_type

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