Farnesoid X receptor activation increases reverse cholesterol transport by modulating bile acid composition and cholesterol absorption in mice.

Title

Farnesoid X receptor activation increases reverse cholesterol transport by modulating bile acid composition and cholesterol absorption in mice.

Creator

Xu Yang; Li Fei; Zalzala Munaf; Xu Jiesi; Gonzalez Frank J; Adorini Luciano; Lee Yoon-Kwang; Yin Liya; Zhang Yanqiao

Publisher

Hepatology (Baltimore, Md.)

Date

2016
2016-10

Description

UNLABELLED: Activation of farnesoid X receptor (FXR) markedly attenuates development of atherosclerosis in animal models. However, the underlying mechanism is not well elucidated. Here, we show that the FXR agonist, obeticholic acid (OCA), increases fecal cholesterol excretion and macrophage reverse cholesterol transport (RCT) dependent on activation of hepatic FXR. OCA does not increase biliary cholesterol secretion, but inhibits intestinal cholesterol absorption. OCA markedly inhibits hepatic cholesterol 7alpha-hydroxylase (Cyp7a1) and sterol 12alpha-hydroxylase (Cyp8b1) partly through inducing small heterodimer partner, leading to reduced bile acid pool size and altered bile acid composition, with the alpha/beta-muricholic acid proportion in bile increased by 2.6-fold and taurocholic acid (TCA) level reduced by 71%. Overexpression of Cyp8b1 or concurrent overexpression of Cyp7a1 and Cyp8b1 normalizes TCA level, bile acid composition, and intestinal cholesterol absorption. CONCLUSION: Activation of FXR inhibits intestinal cholesterol absorption by modulation of bile acid pool size and composition, thus leading to increased RCT. Targeting hepatic FXR and/or bile acids may be useful for boosting RCT and preventing the development of atherosclerosis. (Hepatology 2016;64:1072-1085).

Subject

*Intestinal Absorption; Animals; Bile Acids and Salts/*chemistry; Biological Transport; Cholesterol/*metabolism; Cytoplasmic and Nuclear/*physiology; Inbred C57BL; Mice; Receptors

Identifier

Rights

Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).

Pages

1072–1085

Issue

4

Volume

64

Citation

Xu Yang; Li Fei; Zalzala Munaf; Xu Jiesi; Gonzalez Frank J; Adorini Luciano; Lee Yoon-Kwang; Yin Liya; Zhang Yanqiao, “Farnesoid X receptor activation increases reverse cholesterol transport by modulating bile acid composition and cholesterol absorption in mice.,” NEOMED Bibliography Database, accessed August 3, 2021, https://neomed.omeka.net/items/show/3018.

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