Enhanced sensitivity of pituitary beta-endorphin to ethanol in subjects at high risk of alcoholism

Archives of General Psychiatry
C GianoulakisJ Thavundayil

Abstract

Previous studies have demonstrated that a moderate dose of ethanol induced a significant increase in the plasma beta-endorphin content of subjects from families with a history of alcoholism (high risk (HR)), but not subjects from families without a history of alcoholism (low risk (LR)). The objective of this study was to examine the response of the pituitary beta-endorphin and adrenal cortisol systems to various concentrations of ethanol in male and female subjects at high and low risk of the future development of alcoholism. All subjects participated in four experimental sessions. In each session the subjects were given a drink containing one of the following doses of ethanol: 0, 0.25, 0.50, and 0.75 g of ethanol per kilogram of body weight (for a 60- to 70-kg individual). Blood samples were taken at 0 minutes and at 15, 45, 120, and 180 minutes after the drink for estimation of the blood alcohol, plasma beta-endorphin, and plasma cortisol levels. The concentration of alcohol in the blood at various intervals after the drink was similar among the subjects, regardless of the risk group. Ethanol increased the plasma level of beta-endorphin-related peptides of the HR but not of the LR subjects in a dose-dependent manner. All subj...Continue Reading

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