Activation of nuclear receptor CAR ameliorates diabetes and fatty liver disease

作者：Dong Bingning; Saha Pradip K; Huang Wendong; Chen Wenling; Abu Elheiga Lutfi A; Wakil Salih J^*; Stevens Robert D; Ilkayeva Olga; Newgard Christopher B; Chan Lawrence; Moore David D

来源：Proceedings of the National Academy of Sciences, 2009, 106(44): 18831-18836.

DOI：10.1073/pnas.0909731106

• insulin resistance
• nuclear receptor
• xenobiotics

Constitutive androstane receptor CAR (NR1I3) has been identified as a central mediator of coordinate responses to xenobiotic and endobiotic stress. Here we use leptin-deficient mice (ob/ob) and ob/ob, CAR(-/-) double mutant mice to identify a metabolic role of CAR in type 2 diabetes. Activation of CAR significantly reduces serum glucose levels and improves glucose tolerance and insulin sensitivity. Gene expression analyses and hyperinsulinemic euglycemic clamp results suggest that CAR activation ameliorates hyperglycemia by suppressing glucose production and stimulating glucose uptake and usage in the liver. In addition, CAR activation dramatically improves fatty liver by both inhibition of hepatic lipogenesis and induction of beta-oxidation. We conclude that CAR activation improves type 2 diabetes, and that these actions of CAR suggest therapeutic approaches to the disease.

• 出版日期2009-11-3