Search resultsAlcohol consumption raises HDL cholesterol levels by increasing the transport rate of apolipoproteins A-I and A-II
Title
Alcohol consumption raises HDL cholesterol levels by increasing the transport rate of apolipoproteins A-I and A-II
Publication type
Journal Article
Year of Publication
2000
Authors
Journal
Circulation
Volume
102
Issue
19 SUPPL.
Pagination
2347 - 2352
Date published
2000
ISBN
00097322 (ISSN)
Keywords
Adult, Aged, alcohol, alcohol consumption, Alcohol Drinking, apolipoprotein, Apolipoprotein A-I, Apolipoprotein A-II, Apolipoproteins, article, Biological Transport, caloric intake, cell protection, Cholesterol, cholesterol blood level, cholesterol transport, Cholesterol, HDL, clinical article, dietary intake, enzyme activity, Female, high density lipoprotein cholesterol, human, Humans, lipoprotein synthesis, Lipoproteins, male, metabolic regulation, metabolism, Middle Aged, priority journal, protein metabolism, transport kinetics
Abstract
Background - Moderate alcohol intake is associated with lower atherosclerosis risk, presumably due to increased HDL cholesterol (HDL-C) concentrations; however, the metabolic mechanisms of this increase are poorly understood. Methods and Results - We tested the hypothesis that ethanol increases HDL-C by raising transport rates (TRs) of the major HDL apolipoproteins apoA-I and -II. We measured the turnover of these apolipoproteins in vivo in paired studies with and without alcohol consumption in 14 subjects. The fractional catabolic rate (FCR) and TR of radiolabeled apoA-I and -II were determined in the last 2 weeks of a 4-week Western-type metabolic diet, without (control) or with alcohol in isocaloric exchange for carbohydrates. Alcohol was given as vodka in fixed amounts ranging from 0.20 to 0.81 g · kg-1 · d-1 (mean±SD 0.45±0.19) to reflect the usual daily intake of each subject. HDL-C concentrations increased 18% with alcohol compared with the control (Wilcoxon matched-pairs test, P=0.002). The apoA-I concentrations increased by 10% (P=0.048) and apoA-II concentrations increased by 17% (P=0.005) due to higher apoA-I and -II TRs, respectively, whereas the FCR of both apoA-I and -II did not change. The amount of alcohol consumed correlated with the degree of increase in HDL-C (Pearson's r=0.66, P=0.01) and apoA-I TR (r=0.57, P=0.03). The increase in HDL-C also correlated with the increase in apoA-I TR (r=0.61, P=0.02). Conclusions - Alcohol intake increases HDL-C in a dose-dependent fashion, associated with and possibly caused by an increase in the TR of HDL apolipoproteins apoA-I and -II.