Abstract
Chronic alcohol consumption frequently leads to hypertension in humans. While previous reports have implicated the renin-angiotensin system as a potential mediator of this effect, plasma angiotensin II (AII) levels were either not measured or yielded negative results. The present investigation noted significant elevations in circulating AII in rats intubated daily with ethanol (4 g/kg) for 50 days. Animals administered ethanol only once evidenced AII concentrations equivalent with water intubated controls. Radioligand binding assay data indicated no differences in the number or affinity of Sar 1,Ile 8-AII binding sites in the thalamus, septum-anterior ventral third ventrical region or adrenal gland comparing those groups chronically treated with ethanol to water intubated controls. These results may support a role for the vasoconstrictive hormone AII in the etiology of alcohol-induced hypertension.
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