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Red wine phenolic compounds reduce plasma lipids and apolipoprotein B and prevent early aortic atherosclerosis in hypercholesterolemic golden Syrian hamsters (Mesocricetus auratus).

The effects of a red wine phenolic extract (PE) on plasma lipoproteins and early atherosclerosis were studied in hamsters. Hamsters (n = 32) were divided into 4 groups of 8 and fed an atherogenic diet for 8 wk. They received by force- feeding 7.14 mL/(kg. d) PE in 2.6 mol/L ethanol (E + PE) or PE in water (W + PE), mimicking a moderate consumption of red wine or alcohol-free red wine [30.4 mg/(kg. d)], or 2.6 mol/L ethanol (E-PE) or water (W-PE) as their respective controls. Plasma cholesterol and triglyceride concentrations were lower in groups that consumed PE. The decrease in plasma apolipoprotein (Apo) B concentration was due mainly to PE and was significantly lower in Group E + PE than in Group E-PE (-7.5%) and in Group W + PE than in Group W-PE (-40%). Apo-A1 was not affected. PE significantly increased plasma antioxidant capacity by 9% in Group E + PE and 18% in Group W + PE compared with their respective controls. Liver glutathione peroxidase activity was 67% greater in the group receiving PE in water compared with the group given water; there was no effect when PE was given in ethanol relative to its control. Aortic fatty streak area (AFSA) was significantly reduced in the groups receiving PE in ethanol (-32%) or PE in water (-29%) in comparison with their respective controls. Ethanol significantly reduced AFSA by 60% (Group E-PE vs. Group W-PE) or 62% (Group E + PE vs. Group W + PE). These data suggest that ethanol is a complementary component of phenolics in the benefits of red wine for hamsters and that chronic ingestion of PE in ethanol prevents the development of atherosclerosis through several mechanisms. With moderate consumption of red wine, ethanol can improve the effects of phenolic compounds. However, alcohol-free red wine appears to be a very good alternative to red wine.