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It has been known that tissues of porpoise contain unique structured-lipids as combination of iso-valeric acid (iso-C5:0) and omega 3 polyunsaturated fatty acids (omega3 PUFAs). It is well known that ...omega3 PUFAs have lipid-lowering effects in animal and human studies. Although branched chain fatty acids have been interested in their unique functions, there is no data concerning the effect of iso-C5:0 on lipid metabolism. In this study we investigated the effect of structured-lipids from porpoise adipose tissue (porpoise oil) on lipid metabolism in Otsuka Long-Evans Tokushima Fatty (OLETF) rats. For 4 weeks, rats were fed semisynthetic diets containing either 10% corn oil or 5% corn oil plus 5% porpoise oil. After feeding period, the porpoise oil diet significantly alleviated hepatic triglyceride accumulation compared with the control diet in OLETF rats. Although serum triglyceride level increased, serum level of adiponectin that can protect liver function and alleviate abnormalities of lipid and glucose metabolism increased in rats fed porpoise oil diet. In conclusion, results from the present study suggest that porpoise oil feeding prevents the development of fatty liver disease through the enhancement of lipoprotein secretion and increase of adiponectin production in obese rats.続きを見る
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