Antiepileptic effects of GABAb receptor activation in area CA3 of rat hippocampus.

Published

Journal Article

The role of GABAb receptor activation in the expression of both interictal and ictal phenomena was investigated in slices of area CA3 of the rat hippocampal formation. Interictal-like bursts occurred following application of high frequency trains to the Schaffer collaterals. When two bursts were triggered using paired stimuli, profound depression of the second burst was seen 150-600 ms following the first burst. GABAb receptor antagonists potently reversed the paired pulse depression of the interictal-like bursts. Reversal of the paired depression was also accomplished by increasing the extracellular concentration of K+ by 2-3 mM. Additional experiments were performed in area CA3 to determine the role of GABAb receptor activation on the expression of ictal phenomena. Electrographic seizures (EGSs) were induced by application of high frequency trains. 2-Hydroxy-saclofen (200 microM) significantly decreased the duration of trains required to elicit EGSs. Taken together, these data suggest that GABAb receptor activation has potent inhibitory effects on both ictal and interictal-like events.

Full Text

Duke Authors

Cited Authors

  • Morrisett, RA; Lewis, DV; Swartzwelder, HS; Wilson, WA

Published Date

  • January 15, 1993

Published In

Volume / Issue

  • 600 / 2

Start / End Page

  • 235 - 242

PubMed ID

  • 8382098

Pubmed Central ID

  • 8382098

International Standard Serial Number (ISSN)

  • 0006-8993

Digital Object Identifier (DOI)

  • 10.1016/0006-8993(93)91378-6

Language

  • eng

Conference Location

  • Netherlands