Betatrophin: a hormone that controls pancreatic β cell proliferation.

Betatrophin: a hormone that controls pancreatic β cell proliferation.
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DOI:
10.1016/j.cell.2013.04.008
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发表时间:
2013-05-09
期刊:
影响因子:
64.5
通讯作者:
Melton DA
Melton DA
中科院分区:
生物学1区
文献类型:
--
作者:
Yi P;Park JS;Melton DA

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补充产生胰岛素的胰腺β细胞群将有益于I型和II型糖尿病患者。在成人中,胰腺β细胞主要通过自我复制产生。我们报道了一种新的胰岛素抵抗小鼠模型,该模型诱导了显著的胰腺β细胞增殖和β细胞群扩增。使用这个模型,我们确定了一种新的激素,betatrophin,主要在肝脏和脂肪中表达。在其他胰岛素抵抗小鼠模型和妊娠期间,betatrophin的表达与β细胞增殖相关。小鼠肝脏中betatrophin的瞬时表达显著且特异性地促进胰腺辟田胞增殖,扩大辟田胞群,并改善葡萄糖耐量。因此,betatrophin治疗可以通过增加糖尿病患者内源性胰岛素产生细胞的数量来增加或取代胰岛素注射。
Replenishing insulin-producing pancreatic β cell mass will benefit both type I and type II diabetics. In adults, pancreatic β cells are generated primarily by self duplication. We report on a novel mouse model of insulin resistance that induces dramatic pancreatic β cell proliferation and β cell mass expansion. Using this model we identify a new hormone, betatrophin, that is primarily expressed in liver and fat. Expression of betatrophin correlates with β cell proliferation in other mouse models of insulin resistance and during gestation. Transient expression of betatrophin in mouse liver significantly and specifically promotes pancreatic β cell proliferation, expands β cell mass, and improves glucose tolerance. Thus, betatrophin treatment could augment or replace insulin injections by increasing the number of endogenous insulin-producing cells in diabetics.
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