文章基本信息

标题：Bile Acid-Induced Elevated Oxidative Stress in the Absence of Farnesoid X Receptor
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作者：Masahiro Nomoto ; Masaaki Miyata ; Shanai Yin 等
期刊名称：Biological and Pharmaceutical Bulletin
印刷版ISSN：0918-6158
电子版ISSN：1347-5215
出版年度：2009
卷号：32
期号：2
页码：172-178
DOI：10.1248/bpb.32.172
出版社：The Pharmaceutical Society of Japan
摘要：The major function of farnesoid X receptor (FXR) is to maintain bile acid and lipid homeostasis. Fxr -null mice, in which the levels of hepatic bile acid and lipid have been elevated, develop spontaneous liver tumors. We evaluated differences in hepatic bile acid and triglyceride concentrations, and in generation of oxidative stress between wild-type mice and Fxr -null mice. The hepatic levels of 8-hydroxy-2′-deoxyguanosine (8OHdG), thiobarbituric acid-reactive substance (TBARS) and hydroperoxides, oxidative stress-related genes, and nuclear factor (erythroid-2 like) factor 2 (Nrf2) protein in Fxr -null mice were significantly higher than those in wild-type mice. An increase in the hepatic bile acid concentration in Fxr -null mice fed a cholic acid (CA) diet resulted in an increase in the hepatic levels of hydroperoxides, TBARS and 8OHdG, whereas a decrease in the hepatic concentration in mice fed a diet containing ME3738 (22β-methoxyolean-12-ene-3β,24(4β)-diol) resulted in a decrease in these oxidative stress marker levels. A good correlation was observed between the hepatic bile acid concentrations and the hepatic oxidative stress marker levels, although there was no significant correlation between the hepatic triglyceride concentrations and oxidative stress. The results show that oxidative stress is spontaneously enhanced in Fxr -null mice, which may be attributable to a continuously high level of hepatic bile acids.
关键词：farnesoid X receptor;bile acid;nuclear factor (erythroid-2 like) factor 2;oxidative stress;8-hydroxy-2′-deoxyguanosine