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The effects of alcohol consumption on serum concentrations of apolipoproteins (apo) A-I, C-III, B, and E and of lipoproteins (Lp) A-I, A-I:A-II, C-III, C-III:B, and (a) were studied in 132 healthy subjects, including 55 low drinkers of alcohol (<20 g/day), 36 moderate drinkers (20-50 g/day), and 41 heavy drinkers (>50 g/day), and in 97 hospitalized alcoholic patients (> 100 g/day) without severe liver disease (especially functional insufficiency), before and after 21 days of withdrawal treatment. Serum concentrations of apo A-I, LpA-I, LpA-I:A-II, apo C-III, and LpC-III significantly (P </= 0.01) increased with alcohol intake (mean +/- SE in low drinkers vs in alcoholics)--1.45 +/- 0.03 vs 1.78 +/- 0.05 g/L; 0.45 +/- 0.02 vs 0.56 +/- 0.02 g/L; 0.99 +/- 0.02 vs 1.22 +/- 0.04 g/L; 27.6 +/- 1.5 vs 39.7 +/- 1.7 mg/L; and 8.4 +/- 0.9 vs 24.7 +/- 1.7 mg/L, respectively-whereas apo B and LpC-III:B concentrations tended to decrease--1.20 +/- 0.04 vs 1.06 +/- 0.04 g/L and 19.3 +/- 1.2 vs 14.9 +/- 1.0 mg/L, respectively. No significant difference between these four types of alcohol consumption was noticed for cholesterol, triglycerides, apo E, and Lp(a). After withdrawal, the concentrations of serum apo A-I, apo C-III, LpA-I, LpA-I:A-II, and LpC-III decreased significantly (P </= 0.01), reaching values comparable with those in low drinkers; concentrations of triglycerides, apo B, apo E, and Lp(a) rose; and cholesterol concentration was unaffected. In multiple regression analysis, after adjustment for serum concentrations of albumin, aspartate aminotransferase, and gamma-glutamyltransferase and for the Quetelet index, alcohol consumption remained positively correlated to apo A-I, LpA-I:A-II, apo C-III, and LpC-III concentrations. Study of other determinants of serum apo and lipoprotein concentrations suggests that alcohol-related variations in some of them, especially apo A-I, might depend on the metabolic ability of the liver to synthesize proteins and on induction phenomena. Finally, although the increase of antiatherogenic apo- and lipoproteins and the decrease of those known to be atherogenic were generally marked in alcoholics, alcohol-related modifications of these markers were very limited in our sample of French healthy men. We conclude, therefore, that moderate alcohol consumption (20-50 g/day) is unlikely to protect against ischemic heart disease through an effect on the proteins measured in this study.

Changes in serum apolipoprotein and lipoprotein profile induced by chronic alcohol consumption and withdrawal: determinant effect on heart disease?