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Updated: Jul 7, 2026

Methods for the Discovery of Novel Compounds Modulating a Gamma-Aminobutyric Acid Receptor Type A Neurotransmission
Published on: August 16, 2018
GABAa and GABAc receptor mediated influences on the intensity-response functions of the b- and d-wave in the frog ERG
P Kupenova1, E Popova, L Vitanova
1Department of Physiology, Medical University, 1 G, Sofiiski Str, 1431 Sofia, Bulgaria. pkupenova@abv.bg
Abstract:
We assessed the contribution of GABAa and GABAc receptors to GABAergic effects on b- and d-wave in frog ERG in a wide range of light stimulation conditions. The amplitude of both b- and d-wave was increased during GABAa receptor blockade by bicuculline as well as during additional GABAc receptor blockade by picrotoxin. The effects of GABAa receptor blockade were more pronounced in light adaptation conditions. They strongly depended on stimulus intensity and showed considerable ON/OFF-response asymmetry. The effects of GABAc receptor blockade were more pronounced in dark adaptation conditions. They didn't vary much with stimulus intensity and showed little ON/OFF-response asymmetry.
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