Hepatic FXR/SHP axis modulates systemic glucose and fatty acid homeostasis in aged mice

Kang Ho Kim, Sungwoo Choi, Ying Zhou, Eun Young Kim, Jae Man Lee, Pradip K. Saha, Sayeepriyadarshini Anakk, David D. Moore

Research output: Contribution to journalArticlepeer-review

Abstract

The nuclear receptors farnesoid X receptor (FXR; NR1H4) and small heterodimer partner (SHP; NR0B2) play crucial roles in bile acid homeostasis. Global double knockout of FXR and SHP signaling (DKO) causes severe cholestasis and liver injury at early ages. Here, we report an unexpected beneficial impact on glucose and fatty acid metabolism in aged DKO mice, which show suppressed body weight gain and adiposity when maintained on normal chow. This phenotype was not observed in single Fxr or Shp knockouts. Liver-specific Fxr/Shp double knockout mice fully phenocopied the DKO mice, with lower hepatic triglyceride accumulation, improved glucose/insulin tolerance, and accelerated fatty acid use. In both DKO and liver-specific Fxr/Shp double knockout livers, these metabolic phenotypes were associated with altered expression of fatty acid metabolism and autophagy-machinery genes. Loss of the hepatic FXR/SHP axis reprogrammed white and brown adipose tissue gene expression to boost fatty acid usage. Conclusion: Combined deletion of the hepatic FXR/SHP axis improves glucose/fatty acid homeostasis in aged mice, reversing the aging phenotype of body weight gain, increased adiposity, and glucose/insulin tolerance, suggesting a central role of this axis in whole-body energy homeostasis. (Hepatology 2017;66:498–509).

Original languageEnglish (US)
Pages (from-to)498-509
Number of pages12
JournalHepatology
Volume66
Issue number2
DOIs
StatePublished - Aug 2017

ASJC Scopus subject areas

  • Hepatology

Fingerprint Dive into the research topics of 'Hepatic FXR/SHP axis modulates systemic glucose and fatty acid homeostasis in aged mice'. Together they form a unique fingerprint.

Cite this