Liver-derived systemic factors drive β cell hyperplasia in insulin-resistant states.

Liver-derived systemic factors drive β cell hyperplasia in insulin-resistant states.
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DOI:
10.1016/j.celrep.2013.01.007
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发表时间:
2013-02-21
期刊:
影响因子:
8.8
通讯作者:
Kulkarni RN
Kulkarni RN
中科院分区:
生物学1区
文献类型:
--
作者:
El Ouaamari A;Kawamori D;Dirice E;Liew CW;Shadrach JL;Hu J;Katsuta H;Hollister-Lock J;Qian WJ;Wagers AJ;Kulkarni RN

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综合器官串扰调节能量平衡的关键方面,其失调可能是肥胖和糖尿病等代谢紊乱的基础。为了验证肝脏和胰岛之间的串扰调节β细胞生长以应对胰岛素抵抗的假设,我们使用了肝脏特异性胰岛素受体基因敲除(LIRKO)小鼠,这是一种表现出显著胰岛增生的独特模型。采用体内互补异育和移植试验,以及体外胰岛培养方法,我们证明了体液、非神经、非细胞自主因子(S)诱导LIRKO小鼠β细胞增殖。此外,我们报告了一种肝细胞衍生因子(S)在体外实验中刺激小鼠和人类β细胞的增殖,而不依赖于环境中的葡萄糖和胰岛素水平。这些数据表明,肝脏是胰岛素抵抗状态下β细胞生长因子(S)的关键来源。
Integrative organ crosstalk regulates key aspects of energy homeostasis, and its dysregulation may underlie metabolic disorders such as obesity and diabetes. To test the hypothesis that crosstalk between the liver and pancreatic islets modulates β cell growth in response to insulin resistance, we used the liver-specific insulin receptor knockout (LIRKO) mouse, a unique model that exhibits dramatic islet hyperplasia. Using complementary in vivo parabiosis and transplantation assays, as well as in vitro islet culture approaches, we demonstrate that humoral, nonneural, non-cell-autonomous factor(s) induces β cell proliferation in LIRKO mice. Furthermore, we report that a hepatocyte-derived factor(s) stimulates mouse and human β cell proliferation in ex vivo assays, independent of ambient glucose and insulin levels. These data implicate the liver as a critical source of β cell growth factor(s) in insulin-resistant states.
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