Abstract
The effect of a single large dose of ethanol (5 mg/kg body weight) on plasma glucagon (IRG) and insulin (IRI) concentrations was studied in rats fasting for 24 hr. Hepatic cAMP concentration and blood glucose were also estimated and correlated with hormonal changes. Plasma IRG concentrations had doubled by the first sampling time (2 hr) and remained at this level up to 16 hr after ethanol administration. Plasma IRI concentrations were not affected by ethanol. Hepatic cAMP concentrations reflected changes in the plasma insulin/glucagon ratio, which seems to be the major determining factor for hepatic cAMP even during ethanol oxidation. Hypoglycemia was not found in the ethanol group during the experimental period of 24 hr, and it was therefore concluded that ethanol may stimulate glucagon secretion in rats even without concurrent hypoglycemia. Possible mechanisms for the action of ethanol on the endocrine pancrease are discussed.
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