GABAa and GABAc receptor mediated influences on the intensity-response functions of the b- and d-wave in the frog ERG

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• 作者：P. Kupenova ; E. Popova ; L. Vitanova
• 关键词：GABAa receptors ; GABAc receptors ; ERG ; Intensity-response function ; Retina
• 刊名：Vision Research
• 出版年：2008
• 期刊代码：268_00426989
• 类别：med
• 出版时间：March 2008
• 卷：48
• 期：7
• 页码：882-892
• 文件大小：854 K

摘要

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.