A muscle-liver-fat signalling axis is essential for central control of adaptive adipose remodelling.

A muscle-liver-fat signalling axis is essential for central control of adaptive adipose remodelling.
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肌肉液脂肪信号轴对于自适应脂肪重塑的中心控制至关重要。

DOI:
10.1038/ncomms7693
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发表时间:
2015-04-01
影响因子:
16.6
通讯作者:
Tanaka, Hirotoshi
Tanaka, Hirotoshi
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Shimizu, Noriaki;Maruyama, Takako;Yoshikawa, Noritada;Matsumiya, Ryo;Ma, Yanxia;Ito, Naoki;Tasaka, Yuki;Kuribara-Souta, Akiko;Miyata, Keishi;Oike, Yuichi;Berger, Stefan;Schuetz, Guenther;Takeda, Shin'ichi;Tanaka, Hirotoshi

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Skeletal muscle has a pleiotropic role in organismal energy metabolism, for example, by storing protein as an energy source, or by excreting endocrine hormones. Muscle proteolysis is tightly controlled by the hypothalamus-pituitary-adrenal signalling axis via a glucocorticoid-driven transcriptional programme. Here we unravel the physiological significance of this catabolic process using skeletal muscle-specific glucocorticoid receptor (GR) knockout (GRmKO) mice. These mice have increased muscle mass but smaller adipose tissues. Metabolically, GRmKO mice show a drastic shift of energy utilization and storage in muscle, liver and adipose tissues. We demonstrate that the resulting depletion of plasma alanine serves as a cue to increase plasma levels of fibroblast growth factor 21 (FGF21) and activates liver-fat communication, leading to the activation of lipolytic genes in adipose tissues. We propose that this skeletal muscle-liver-fat signalling axis may serve as a target for the development of therapies against various metabolic diseases, including obesity. Skeletal muscle proteolysis can affect organismal energy homeostasis. Here, the authors provide molecular insight into this process by showing that muscle-derived alanine acts as a signal that triggers FGF21 secretion from the liver, which then regulates lipolysis and browning of white fat tissue.
成纤维细胞生长因子 21 受未折叠蛋白反应的 IRE1 α-XBP1 分支调节并抵消内质网应激诱导的肝脂肪变性
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