Abstract
In the course of screening medicinal plants that modulate hepatic alcohol-metabolizing enzymes and lipid peroxidation, effects of the methanol extract (ME) of Orostachys japonicus and its major bioactive compound, gallic acid (GA), were investigated in rats treated with 10% ethanol solution for 6 weeks. The ME and GA greatly enhanced the activities of hepatic alcohol dehydrogenase (ADH), the microsomal ethanol-oxidizing system (MEOS), and aldehyde dehydrogenase (ALDH) in a dose-dependent manner, but had no effect on catalase. The hepatic lipid peroxide level increased by ethanol administration was moderately reduced by treatment with ME or GA. The results suggest that the detoxification of hepatic alcohol by O. japonicus ME under our experimental conditions was due to the enhanced activities of the alcohol-oxidizing enzymes, ADH, MEOS, and ALDH. In addition, GA may be partly responsible for the effects.
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