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  • Title: Serum gamma-glutamyl transferase levels and blood pressure falls after alcohol moderation.
    Author: Yamada Y, Tsuritani I, Ishizaki M, Ikai E, Ishida M, Noborisaka Y, Honda R.
    Journal: Clin Exp Hypertens; 1997 Apr; 19(3):249-68. PubMed ID: 9107436.
    Abstract:
    Drinkers showing higher serum gamma-glutamyl transferase (GGT) levels tend to have higher blood pressure (BP), independent of the volume of alcohol consumed. To further evaluate the link between alcohol consumption and elevated serum GGT and BP, we observed BP, serum biochemical parameters, plasma pressor hormones and intraplatelet free calcium (Plt. [Ca2+]i) in 40 moderate drinkers who were composed of four categories of 10 each with or without hypertension (> or = 140/90 mmHg) or high serum GGT level (> or = 50 U/L) during four-week alcohol moderation. BP and serum hepatic enzymes including GGT decreased more conspicuously in both normotensive and hypertensive drinkers with high serum GGT. Serum triglyceride was higher and potassium was lower in the drinkers with high serum GGT, and were normalized during alcohol moderation. Serum calcium, Plt. [Ca2+]i and plasma renin activity and cortisol showed some decreases during alcohol moderation, but were not different in the drinkers with different serum GGT and BP levels. No significant changes were observed in plasma catecholamines and aldosterone. These results suggest that BP elevations in moderate drinkers are closely related to hepatic, lipid and electrolyte metabolic alterations induced by alcohol rather than specific pressor agents.
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