Cell Metab:研究解释低睾酮如何增加糖尿病风险

2016-05-04 佚名 生物谷

医务人员很早就知道低睾酮的男性罹患2型糖尿病的风险更高。在最新发表于《Cell Metabolism》期刊的研究中,研究人员首次识别出睾酮如何通过触发胰岛中的关键信号机制而帮助男性调节血糖(水平)。杜兰大学(Tulane University)研究人员担任该研究共同作者。 这项研究可能有助于在大量由于衰老或前列腺癌治疗而导致低睾酮的男性中识别新的2型糖尿病疗法。 "我们已经找到睾酮-缺乏男

医务人员很早就知道低睾酮的男性罹患2型糖尿病的风险更高。在最新发表于《Cell Metabolism》期刊的研究中,研究人员首次识别出睾酮如何通过触发胰岛中的关键信号机制而帮助男性调节血糖(水平)。杜兰大学(Tulane University)研究人员担任该研究共同作者。

这项研究可能有助于在大量由于衰老或前列腺癌治疗而导致低睾酮的男性中识别新的2型糖尿病疗法。

"我们已经找到睾酮-缺乏男性中2型糖尿病的原因和潜在的治疗路径"该研究资深作者、杜兰大学医学院医学系Price-Goldsmith教授Franck Mauvais-Jarvis博士说,"我们的研究表明,睾酮是男性中的一种抗糖尿病激素。如果我们能够调节其活动而不产生副作用,这将是2型糖尿病的疗法大道。"

研究人员使用了专门培育的胰腺β细胞缺少睾酮受体(雄性激素受体)的雄性小鼠。他们给这些小鼠喂饲富含脂肪和糖的西方饮食并测试它们对葡萄糖的反应。与对照组的正常小鼠相比,缺少雄性激素受体的小鼠全部发展出胰岛素分泌减少(的问题),导致葡萄糖耐受不良。

为了更好地理解睾酮如何与胰腺内的胰岛素分泌相互作用,研究人员直接将睾酮和葡萄糖注射到经雄性激素受体抑制剂处理的人类胰岛细胞和来自缺少雄性激素受体的小鼠胰岛细胞。与睾酮受体没有被抑制或缺失的胰岛细胞相比,这两种情况下的胰岛细胞都表现出胰岛素产生减少。

在培养小鼠和人类胰岛细胞中的进一步实验表明,睾酮的胰岛素-产生效应可以被抑制胰高血糖素样肽-1(GLP-1)所摧毁。GLP-1是一种进食后体内产生的激素,目前被用作糖尿病疗法。研究暗示,睾酮放大了GLP-1的胰岛影响。

原始出处:

Navarro G, Xu W, Jacobson DA, Wicksteed B, Allard C, Zhang G, De Gendt K, Kim SH, Wu H, Zhang H, Verhoeven G, Katzenellenbogen JA, Mauvais-Jarvis F. Extranuclear Actions of the Androgen Receptor Enhance Glucose-Stimulated Insulin Secretion in the Male. Cell Metab. 2016 Apr 26. pii: S1550-4131(16)30118-8

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    2017-02-06 一闲
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    2016-06-13 维他命
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    2016-05-25 guojianrong
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    2016-05-09 jaysppr

    学习啦,不错

    0

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    2016-05-09 jaysppr

    学习啦,不错

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