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(-) Epigallocatechin Gallate (EGCG) Prevents Lipid Changes and Collagen Abnormalities in Chronic Ethanol-Fed Rats

ABSTRACT The objective of the study is to examine the influence of (-) epigallocatechin gallate (EGCG), a green tea component, on lipid and collagen abnormalities in chronic ethanol-fed rats. Solubility properties, aldehyde content, fluorescence, and peroxidation were analyzed in collagen samples isolated from liver. Chronic alcoholism (6 g/kg/day × 60 days) was associated with fatty liver and collagen accumulation. Significant alterations in the levels of lipids (cholesterol, phospholipids, free fatty acids, and triglycerides) and total collagen were observed in liver. Collagen obtained from ethanol-fed rats showed alterations in solubility properties, increased fluorescence, peroxidation, and aldehyde content. Coadministration of EGCG along with ethanol significantly reduced the levels of liver lipids and collagen, improved the solubility properties of collagen, and caused a reduction in cross-linking as evidenced by a decrease in fluorescence, peroxidation, and aldehyde content. Histology of liver sections of ethanol-fed rats showed accumulation of fat and collagen, which were largely prevented by EGCG administration. The possible mechanisms in the protective action of EGCG in alcoholic liver disease are suggested and discussed.