Abstract

The activity of liver alcohol dehydrogenase (LADH) from rats sacrificed two hours after the administration of ethanol 3, 4 or 5 g/kg intraperitoneally was significantly inhibited compared to the activity of LADH from control rats. LADH activity was inversely related to the dose of ethanol admnistered, to the concentration of ethanol in the liver, and to the concentration of ethanol in the blood. The clearance of blood ethanol in rats was dose-dependent and was inversely related to the dose administered. The half-life of ethanol elimination increased as the dose of ethanol increased. These results suggest that ethanol-induced inhibition of LADH can occur in vivo and that the level of activity of this enzyme determines the rate of oxidation of ethanol.

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