Author:
Nagao Koji,Inoue Nao,Suzuki Kunio,Shimizu Takeshi,Yanagita Teruyoshi
Abstract
Dietary sterols are catabolized into various substances in the intestinal tract. Dietary 3-oxo derivatives of cholesterol and plant sterols (e.g., cholest-4-en-3-one and campest-5-en-3-one) have been shown to have anti-obesity effects. In this study, we tested whether feeding cholest-5-en-3-one (5-cholestenone), a cholesterol metabolite, to db/db mice protects them from obesity-associated metabolic disorders. In db/db mice, dietary 5-cholestenone significantly alleviated hepatomegaly and elevated serum triglyceride levels; however, the effect was not sufficient to improve hepatic steatosis and obesity. On the other hand, hyperglycemia and severe hyperinsulinemia in control db/db mice were markedly attenuated in 5-cholestenone-fed db/db mice. The production of inflammatory cytokines, such as monocyte chemoattractant protein-1, interleukin-6, and tumor necrosis factor-alpha (TNFα), was decreased, suggesting that the suppressive actions of 5-cholestenone were attributable to the alleviation of chronic inflammation in db/db mice. Additionally, 5-cholestenone showed an inhibitory effect on TNFα-induced nuclear factor kappa B (NFκB) activation in the NFκB luciferase gene reporter assay. These results suggest that obesity-induced abnormal glucose metabolism could be alleviated in 5-cholestenone-fed db/db mice by reducing the production of inflammatory cytokines through suppression of the NFκB signaling pathway.
Funder
Japan Society for the Promotion of Science
Subject
Molecular Biology,Biochemistry,Endocrinology, Diabetes and Metabolism
Cited by
10 articles.
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