Mechanisms by which a Very-Low-Calorie Diet Reverses Hyperglycemia in a Rat Model of Type 2 Diabetes.

Mechanisms by which a Very-Low-Calorie Diet Reverses Hyperglycemia in a Rat Model of Type 2 Diabetes.
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DOI:
10.1016/j.cmet.2017.10.004
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发表时间:
2018-01-09
期刊:
影响因子:
29
通讯作者:
Shulman GI
Shulman GI
中科院分区:
生物学1区
文献类型:
--
作者:
Perry RJ;Peng L;Cline GW;Wang Y;Rabin-Court A;Song JD;Zhang D;Zhang XM;Nozaki Y;Dufour S;Petersen KF;Shulman GI

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Caloric restriction rapidly reverses type 2 diabetes (T2D) but the mechanism(s) of this reversal are poorly understood. Here we show that three days of a very low-calorie diet (VLCD, 1/4 their typical intake) lowered plasma glucose and insulin concentrations in a rat model of T2D without altering body weight. The lower plasma glucose was associated with a 30% reduction in hepatic glucose production resulting from suppression of both gluconeogenesis from pyruvate carboxylase (VPC), explained by a reduction in hepatic acetyl-CoA content, and net hepatic glycogenolysis. In addition, VLCD resulted in reductions in hepatic triglyceride and diacylglycerol content and PKCε translocation, associated with improved hepatic insulin sensitivity. Taken together these data show that there are pleotropic mechanisms by which VLCD reverses hyperglycemia in a rat model of T2D, including reduced DAG-PKCε-induced hepatic insulin resistance, reduced hepatic glycogenolysis, and reduced hepatic acetyl-CoA content, PC flux and gluconeogenesis. XXX show that short-term (3 days) low calorie diet improves glucose metabolism before weight loss in a rat model of T2 diabetes and trace the beneficial metabolic effects to improved liver metabolism due to reductions in hepatic glycogenolysis, acetyl-CoA driven pyruvate carboxylase flux, and TAG-DAG-PKC mediated insulin resistance.
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