Glucocorticoid Receptor Mediates the Effect of High-Fat Diet on Mitochondrial Oxidative Phosphorylation in Mouse Liver

Runsheng LI, Yimin Jia, Shifeng Pan, Xian Li, Haogang Song, Ruqian Zhao*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Obesity is associated with hepatic mitochondrial dysfunction. The relationship between glucocorticoids (GCs) and obesity has also been demonstrated in several researches. Recent research showed that GCs can affect the mitochondrial function. However, the role of glucocorticoid receptor (GR) in obesity-induced mitochondrial dysfunction remains unclear. C57BL/6 male mice fed with a high-fat diet (HFD) for 7 weeks were used as a model. The mice were shown to be overweight, together with lower serum and hepatic corticosterone levels. The hepatic expressions of mitochondrial DNA (mtDNA)-encoded genes were lower in the HFD mice, same as the mtDNA copy number, ATP content, and COX enzyme activity. Both the translocation of GR (NR3C1) into mitochondria and the binding of GR to the mtDNA were lower in the liver of HFD mice. The PGC1α mRNA expression, protein content, and translocation into mitochondria were also found to be reduced, with the lower GR binding to the promoter region of PGC1α in the liver of HFD mice. GR, as a transcription factor, may take an important role in the regulation of mitochondrial oxidative phosphorylation in the HFD mice by interacting with PGC1α and controlling mtDNA expression.

Original languageEnglish
Pages (from-to)51-58
Number of pages8
JournalDNA and Cell Biology
Volume35
Issue number2
DOIs
Publication statusPublished - 1 Feb 2016

Scopus Subject Areas

  • Molecular Biology
  • Genetics
  • Cell Biology

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