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Abstract ▼ AI-Helper

Effects of single and repeated administration of various nootropic candidates were examined on impaired acquisition by single oral administration of 3 g/kg ethanol (EtOH) in step through test. The inhibitory effect of EtOH on acquisition was significantly reduced by single picrotoxin, but not affect...

Effects of single and repeated administration of various nootropic candidates were examined on impaired acquisition by single oral administration of 3 g/kg ethanol (EtOH) in step through test. The inhibitory effect of EtOH on acquisition was significantly reduced by single picrotoxin, but not affected by diazepam, acetyl-L-carnitine and apomorphine. Single or repeated red ginseng total saponin and deprenyl, single piracetam, repeated N-methyl-D-glucamine, but not single or repeated protopanaxadiol, protopanaxatriol and centrophenoxine significantly ameliorated the impairment of acquisition by EtOH. On the other hand, the inhibitory effect of repeated red ginseng total saponin but not that of repeated N-methyl-D-Glucamine, was significantly blocked by pretreatment of $\alpha$-methyl-$\rho$-tyrosine, a inhibitor of catecholamine synthesis. Whereas, the inhibitory effect of repeated deprenyl on EtOH amnesia was exaggerated by $\alpha$-methyl-$\rho$-tyrosine. These results suggest that the amelioration processes of drugs on ethanol amnesia involve complex mechanism between the central GABAergic and dopaminergic neuronal activity in memory and learning, although the effects of repeated drugs administration are not yet clear.

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