Frontiers in Pharmacology (May 2019)

Irisin Is Controlled by Farnesoid X Receptor and Regulates Cholesterol Homeostasis

  • Hong Li,
  • Hong Li,
  • Jing Shen,
  • Jing Shen,
  • Tong Wu,
  • Tong Wu,
  • Jiangying Kuang,
  • Jiangying Kuang,
  • Qinhui Liu,
  • Shihai Cheng,
  • Shihai Cheng,
  • Shiyun Pu,
  • Shiyun Pu,
  • Lei Chen,
  • Lei Chen,
  • Rui Li,
  • Rui Li,
  • Yanping Li,
  • Yanping Li,
  • Min Zou,
  • Zhiyong Zhang,
  • Wei Jiang,
  • Aijuan Qu,
  • Jinhan He,
  • Jinhan He

DOI
https://doi.org/10.3389/fphar.2019.00548
Journal volume & issue
Vol. 10

Abstract

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ObjectiveThe aim of this study was to investigate whether the nuclear receptor farnesoid X receptor (FXR) could regulate FNDC5/Irisin expression and the role of Irisin in hyperlipidemia and atherosclerosis in ApoE-/- mice.Methods and ResultsWe treated primary human hepatocytes, HepG2 cells, and Rhesus macaques with FXR agonist (CDCA, GW4064, and ivermectin). FNDC5 expression was highly induced by CDCA and GW4064 in hepatocytes, HepG2 cells, and the circulating level of Irisin increased in Rhesus macaques. Luciferase reporter and CHIP assays were used to determine whether FXR could regulate FNDC5 promoter activity. Irisin-ApoE-/- and ApoE-/- mice were used to study the metabolic function of Irisin in dyslipidemia and atherosclerosis. Irisin-ApoE-/- mice showed improved hyperlipidemia and alleviated atherosclerosis as compared with ApoE-/- mice. Irisin upregulated the expression of Abcg5/Abcg8 in liver and intestine, which increased the transport of biliary cholesterol and fecal cholesterol output.ConclusionActivation of FXR induces FNDC5 mRNA expression in human and increased the circulating level of Irisin in Rhesus macaques. FNDC5/Irisin is a direct transcriptional target of FXR. Irisin may be a novel therapeutic strategy for dyslipidemia and atherosclerosis.

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