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Xueying Lin, Akiko Taguchi, Sunmin Park, Jake A. Kushner, Fan Li, Yedan Li, Morris F. White
J Clin Invest. 2004;
114(7):908
doi:10.1172/JCI22217
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he molecular link between obesity and β cell failure that causes diabetes is difficult to establish. Here we show that a conditional knockout of insulin receptor substrate 2 (Irs2) in mouse pancreas β cells and parts of the brain — including the hypothalamus —increased appetite, lean and fat body mass, linear growth, and insulin resistance that progressed to diabetes. Diabetes resolved when the mice were between 6 and 10 months of age: functional β cells expressing Irs2 repopulated the pancreas, restoring sufficient β cell function to compensate for insulin resistance in the obese mice. Thus, Irs2 signaling promotes regeneration of adult β cells and central control of nutrient homeostasis, which can prevent obesity and diabetes in mice.
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