Adipocyte CREB promotes insulin resistance in obesity.

Adipocyte CREB promotes insulin resistance in obesity.
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DOI:
10.1016/j.cmet.2009.01.006
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发表时间:
2009-03
期刊:
影响因子:
29
通讯作者:
Montminy M
Montminy M
中科院分区:
生物学1区
文献类型:
--
作者:
Qi L;Saberi M;Zmuda E;Wang Y;Altarejos J;Zhang X;Dentin R;Hedrick S;Bandyopadhyay G;Hai T;Olefsky J;Montminy M

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Increases in adiposity trigger metabolic and inflammatory changes that interfere with insulin action in peripheral tissues, culminating in beta cell failure and overt diabetes. We found that the cAMP Response Element Binding protein (CREB) is activated in adipose under obese conditions, where it promotes insulin resistance by triggering expression of the transcriptional repressor ATF3 and thereby down-regulating expression of the adipokine hormone adiponectin as well as the insulin-sensitive glucose transporter 4 (GLUT4). Transgenic mice expressing a dominant negative CREB transgene in adipocytes displayed increased whole body insulin sensitivity in the contexts of diet-induced and genetic obesity; and they were protected from the development of hepatic steatosis and adipose tissue inflammation. These results indicate that adipocyte CREB provides an early signal in the progression to Type 2 diabetes.
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