TRAF2, an Innate Immune Sensor, Reciprocally Regulates Mitophagy and Inflammation to Maintain Cardiac Myocyte Homeostasis.
TRAF2, an Innate Immune Sensor, Reciprocally Regulates Mitophagy and Inflammation to Maintain Cardiac Myocyte Homeostasis.
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DOI:
10.1016/j.jacbts.2021.12.002
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发表时间:
2022-03
期刊:
影响因子:
--
通讯作者:
Diwan A
中科院分区:
文献类型:
--
作者:
Ma X;Rawnsley DR;Kovacs A;Islam M;Murphy JT;Zhao C;Kumari M;Foroughi L;Liu H;Qi K;Diwan A;Hyrc K;Evans S;Satoh T;French BA;Margulies KB;Javaheri A;Razani B;Mann DL;Mani K;Diwan A
TRAF2, an innate immunity adaptor protein, localizes to the mitochondria in cardiac myocytes in human and mouse hearts during physiology, with increased mitochondrial localization under pathologic stress. TRAF2 is essential for physiological mitophagy in cardiac myocytes, with a critical requirement for its E3 ligase domain in this role. TRAF2 suppresses expression of TLR9, a sensor for leaked mitochondrial DNA, to suppress sterile inflammation in the myocardium. Loss of physiological TRAF2-mediated mitophagy in cardiac myocytes triggers myocardial inflammation and cardiac myocyte cell death. Interruption of TLR9-mediated mitochondrial DNA sensing rescues inflammation, but persistence of damaged mitochondria leads to cell death with aging, pointing to a critical role for physiological cardiac myocyte mitophagy in maintaining myocardial homeostasis. Mitochondria are essential for cardiac myocyte function, but damaged mitochondria trigger cardiac myocyte death. Although mitophagy, a lysosomal degradative pathway to remove damaged mitochondria, is robustly active in cardiac myocytes in the unstressed heart, its mechanisms and physiological role remain poorly defined. We discovered a critical role for TRAF2, an innate immunity effector protein with E3 ubiquitin ligase activity, in facilitating physiological cardiac myocyte mitophagy in the adult heart, to prevent inflammation and cell death, and maintain myocardial homeostasis.
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影响因子:
37.8
作者:
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通讯作者:
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影响因子:
8
作者:
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DOI:
10.1126/science.aad2459
发表时间:
2015-12-04
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
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Dorn GW 2nd
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通讯作者:
Zhang XK
DOI:
10.1083/jcb.201603039
发表时间:
2016-08-01
期刊:
The Journal of cell biology
影响因子:
--
作者:
McWilliams TG;Prescott AR;Allen GF;Tamjar J;Munson MJ;Thomson C;Muqit MM;Ganley IG
通讯作者:
Ganley IG