UCP1-independent signaling involving SERCA2b-mediated calcium cycling regulates beige fat thermogenesis and systemic glucose homeostasis.
UCP1-independent signaling involving SERCA2b-mediated calcium cycling regulates beige fat thermogenesis and systemic glucose homeostasis.
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DOI:
10.1038/nm.4429
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发表时间:
2017-12
期刊:
影响因子:
82.9
通讯作者:
Kajimura S
中科院分区:
文献类型:
--
作者:
Ikeda K;Kang Q;Yoneshiro T;Camporez JP;Maki H;Homma M;Shinoda K;Chen Y;Lu X;Maretich P;Tajima K;Ajuwon KM;Soga T;Kajimura S
Uncoupling Protein 1 (UCP1) plays a central role in non-shivering thermogenesis in brown fat; however, its role in beige fat remains unclear. Here we report a robust UCP1-independent thermogenic mechanism in beige fat that involves enhanced ATP-dependent Ca2+ cycling by sarco/endoplasmic reticulum Ca2+-ATPase2b (SERCA2b) and ryanodine receptor 2 (RyR2). Inhibition of SERCA2b impairs UCP1-independent beige fat thermogenesis in humans and mice, as well as in pigs, a species that lacks a functional UCP1 protein. Conversely, enhanced Ca2+ cycling by the activation of α1/β3-adrenergic receptors or the SERCA2b-RyR2 pathway stimulates UCP1-independent thermogenesis. In the absence of UCP1, beige fat dynamically expends glucose through enhanced glycolysis, tricarboxylic acid metabolism, and pyruvate dehydrogenase activity for ATP-dependent thermogenesis by the SERCA2b pathway; beige fat thereby functions as a “glucose-sink” and improves glucose tolerance independent of body-weight loss. Our study uncovers a non-canonical thermogenic mechanism by which beige fat controls whole-body energy homeostasis through Ca2+ cycling.
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影响因子:
29
作者:
Kajimura S;Spiegelman BM;Seale P
通讯作者:
Seale P
影响因子:
82.9
作者:
通讯作者:
--
影响因子:
5.2
作者:
Collins S
通讯作者:
Collins S
影响因子:
64.5
作者:
Fedorenko A;Lishko PV;Kirichok Y
通讯作者:
Kirichok Y
影响因子:
4.8
作者:
Golozoubova, V;Hohtola, E;Nedergaard, J
通讯作者:
Nedergaard, J