Non-competitive Inhibition of Kainate-Induced Currents by Diethylstilbestrol in Acutely Isolated Mouse CA1 Hippocampal Neurons

Abstract

The effect of a synthetic estrogen, diethylstilbestrol(DES), on kainate−induced currents was investigated in the hippocampal CA1 pyramidal neurons acutely dissociated from the mice using the nystatin−perforated patch−clamp recording configuration under voltage−clamp conditions.DES inhibited the current evoked by 100μM kainate in a concentration−dependent manner with a half−maximum inhibitory concentration of 8.8μM.The action of DES was voltage−independent.Since DES produced a suppression of the maximum response of the kainate concentration−response curve, the inhibition by DES of the kainate−induced current appears to be non−competitive.