Importance of β-Catenin in glucose and energy homeostasis.

Importance of β-Catenin in glucose and energy homeostasis.
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DOI:
10.1038/srep00693
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发表时间:
2012
期刊:
影响因子:
4.6
通讯作者:
Bernal-Mizrachi, Ernesto
Bernal-Mizrachi, Ernesto
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Elghazi, Lynda;Gould, Aaron P.;Weiss, Aaron J.;Barker, Daniel J.;Callaghan, John;Opland, Darren;Myers, Martin;Cras-Meneur, Corentin;Bernal-Mizrachi, Ernesto

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In settings of increased insulin demand, failure to expand pancreatic β-cells mass leads to diabetes. Genome-wide scans of diabetic populations have uncovered several genes associated with susceptibility to type 2 diabetes and a number of them are part of the Wnt signaling. β-Catenin, a Wnt downstream effector participates in pancreatic development, however, little is known about its action in mature β-cells. Deletion of β-Catenin in Pdx1 pancreatic progenitors leads to a decreased β-cell mass and impaired glucose tolerance. Surprisingly, loss of β-catenin made these mice resistant to high fat diet because of their increased energy expenditure and insulin sensitivity due to hyperactivity. The complexity of this phenotype was also explained in part by ectopic expression of Cre recombinase in the hypothalamus. Our data implicates β-Catenin in the regulation of metabolism and energy homeostasis and suggest that Wnt signaling modulates the susceptibility to diabetes by acting on different tissues.
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