Open AccessFADD is a key regulator of lipid metabolism
Author(s) -
Zhuang Hongqin,
Wang Xueshi,
Zha Daolong,
Gan Ziyi,
Cai Fangfang,
Du Pan,
Yang Yunwen,
Yang Bingya,
Zhang Xiangyu,
Yao Chun,
Zhou Yuqiang,
Jiang Chizhou,
Guan Shengwen,
Zhang Xuerui,
Zhang Jing,
Jiang Wenhui,
Hu Qingang,
Hua ZiChun
Publication year - 2016
Publication title -
embo molecular medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.923
H-Index - 107
eISSN - 1757-4684
pISSN - 1757-4676
DOI - 10.15252/emmm.201505924
Subject(s) - china , library science , medicine , political science , law , computer science
Abstract FADD , a classical apoptotic signaling adaptor, was recently reported to have non‐apoptotic functions. Here, we report the discovery that FADD regulates lipid metabolism. PPAR ‐α is a dietary lipid sensor, whose activation results in hypolipidemic effects. We show that FADD interacts with RIP 140, which is a corepressor for PPAR ‐α, and FADD phosphorylation‐mimic mutation ( FADD ‐D) or FADD deficiency abolishes RIP 140‐mediated transcriptional repression, leading to the activation of PPAR ‐α. FADD ‐D‐mutant mice exhibit significantly decreased adipose tissue mass and triglyceride accumulation. Also, they exhibit increased energy expenditure with enhanced fatty acid oxidation in adipocytes due to the activation of PPAR ‐α. Similar metabolic phenotypes, such as reduced fat formation, insulin resistance, and resistance to HFD ‐induced obesity, are shown in adipose‐specific FADD knockout mice. Additionally, FADD ‐D mutation can reverse the severe genetic obesity phenotype of ob / ob mice, with elevated fatty acid oxidation and oxygen consumption in adipose tissue, improved insulin resistance, and decreased triglyceride storage. We conclude that FADD is a master regulator of glucose and fat metabolism with potential applications for treatment of insulin resistance and obesity.