Loss-of-function myostatin mutation increases insulin sensitivity and browning of white fat in Meishan pigs

文献类型： 外文期刊

第一作者： Cai, Chunbo

作者： Cai, Chunbo;Qian, Lili;Jiang, Shengwang;Wang, Qingqing;Ma, Dezun;Xiao, Gaojun;Li, Biao;Xie, Shanshan;Gao, Ting;Cui, Wentao;Li, Kui;Cai, Chunbo;Qian, Lili;An, Xiaorong;Gao, Ting;Chen, Yaoxing;Sun, Youde;Liu, Jie

作者机构：

关键词： myostatin deficiency;skeletal muscle;fat;insulin sensitivity;irisin

期刊名称：ONCOTARGET （ 影响因子：5.168； 五年影响因子：5.312 ）

ISSN： 1949-2553

年卷期： 2017 年 8 卷 21 期

页码：

收录情况： SCI

摘要： Myostatin-deficient mice showed a remarkable hypertrophy of skeletal muscle, with a decreased fat mass and enhanced insulin sensitivity. Currently, it is unclear if the inhibition of myostatin could be used as an approach to treat human obesity and insulin resistance. In this study, we investigated if the inhibition of porcine myostatin has any effect on fat deposition and insulin sensitivity using genetically engineered Meishan pigs containing a myostatin loss-of-function mutation (Mstn(-/-)). Our results indicated that, when compared with wild-type pigs, the amount of subcutaneous fat and leaf fat of Mstn(-/-) pigs were significantly decreased mainly due to the browning of subcutaneous adipose tissue. Additionally, the serum insulin level decreased and the insulin sensitivity increased significantly in Mstn(-/-) pigs. Moreover, we found a significant increase in levels of insulin receptor and insulin receptor substrate proteins in skeletal muscle of Mstn(-/-) pigs, which then activating the insulin signaling pathway. Irisin-mediated regulation is not the only pathway for the activation of insulin signal in Mstn(-/-) skeletal muscle. This study provides valuable insight for the treatment of human obesity and diabetes mellitus.

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