Loss of Hepatic Mitochondrial Long-Chain Fatty Acid Oxidation Confers Resistance to Diet-Induced Obesity and Glucose Intolerance

Cell Reports

Susanna Scafidi¹  Michael J. Wolfgang²  Joseph Choi²  Ebru S. Selen Alpergin²  Jieun Lee²  Liang Zhao³  Thomas Hartung³  Ryan C. Riddle⁴ 

[1] Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA;Department of Biological Chemistry, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA;Department of Environmental Health and Engineering, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA;Department of Orthopaedic Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA;

关键词: hormesis;    Fgf21;    Gdf15;    fatty acid oxidation;    obesity;    diabetes;    steatosis;    NASH;    NAFLD;    gluconeogenesis;    ketogenesis;   

DOI  :  10.1016/j.celrep.2017.06.080

来源: DOAJ

【 摘 要 】

The liver has a large capacity for mitochondrial fatty acid β-oxidation, which is critical for systemic metabolic adaptations such as gluconeogenesis and ketogenesis. To understand the role of hepatic fatty acid oxidation in response to a chronic high-fat diet (HFD), we generated mice with a liver-specific deficiency of mitochondrial long-chain fatty acid β-oxidation (Cpt2L−/− mice). Paradoxically, Cpt2L−/− mice were resistant to HFD-induced obesity and glucose intolerance with an absence of liver damage, although they exhibited serum dyslipidemia, hepatic oxidative stress, and systemic carnitine deficiency. Feeding an HFD induced hepatokines in mice, with a loss of hepatic fatty acid oxidation that enhanced systemic energy expenditure and suppressed adiposity. Additionally, the suppression in hepatic gluconeogenesis was sufficient to improve HFD-induced glucose intolerance. These data show that inhibiting hepatic fatty acid oxidation results in a systemic hormetic response that protects mice from HFD-induced obesity and glucose intolerance.

【 授权许可】

Unknown