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Effect of hyperleptinaemia on chronic ethanol-induced hepatotoxicity in mice.
Ethanol metabolism is accompanied by generation of free radicals, which stimulate lipid peroxidation. Previous studies have proposed a possible link between leptin and non-alcoholic fatty liver disease; however, the effect of leptin on ethanol-induced liver diseases remains unclear. The aim of the present study was to explore the effect of leptin on ethanol-induced liver injury in mice. Administering ethanol (6.32 g/kg body weight p.o.) to 4-week-old healthy mice for 45 days resulted in significantly elevated levels of plasma leptin, total bilirubin, gamma-glutamyl transpeptidase ( GGT), tissue lipid hydroperoxides (LOOH), and lowered levels of tissue vitamins C and E when compared with those of the control mice. Subsequent to the experimental induction of hepatotoxicity (i.e. after the initial period of 30 days) exogenous leptin was administered (230 microg/kg body weight i.p.) every alternate day for 15 days along with the daily dose of ethanol. Leptin administration to control and ethanol-treated mice significantly reduced the weight gain, elevated the plasma levels of leptin, bilirubin, GGT and tissue LOOH, and significantly lowered the levels of tissue vitamins C and E when compared with the untreated control and ethanol-supplemented mice. It is postulated that the increase in systemic leptin levels enhances oxidative stress, and lowers antioxidant defence, leading to the augmented hepatic inflammation observed in alcoholic liver disease.[1]References
- Effect of hyperleptinaemia on chronic ethanol-induced hepatotoxicity in mice. Balasubramaniyan, V., Nalini, N. Fundamental & clinical pharmacology. (2006) [Pubmed]
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