Glycogen synthase kinase-3 inhibitors prevent caspase-dependent apoptosis induced by ethanol in cultured rat cortical neurons

European Journal of Pharmacology
Tsuneo Takadera, Takao Ohyashiki

Abstract

The effect of ethanol on cell viability was examined in rat cultured cortical neurons. Ethanol induced apoptosis, which was characterized by cell shrinkage, nuclear condensation or fragmentation and internucleosomal DNA fragmentation. Ethanol-induced apoptosis was prevented by N-methyl-d-aspartate (NMDA), an agonist of the NMDA receptor, which is a subtype of ionotropic glutamate receptors. Incubation with glycogen synthase kinase-3 (GSK-3) inhibitors 3-(2,4-dichlorophenyl)-4-(1-methyl-1H-indol-3-yl)-1H-pyrrole-2,5-dione (SB216763) and alsteropaullone, but not a cyclin-dependent protein kinase 5 inhibitor roscovitine, completely protected the neurons from ethanol-induced apoptosis. Apoptosis was accompanied by the activation of caspase-3 and prevented by a caspase-3 inhibitor. These results suggest that ethanol induces caspase-dependent apoptosis mediated by glycogen synthase kinase-3 activation in cultured rat cortical neurons.

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