Endogenous HMGB1 regulates autophagy.
Endogenous HMGB1 regulates autophagy.
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DOI:
10.1083/jcb.200911078
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发表时间:
2010-09-06
期刊:
影响因子:
--
通讯作者:
Lotze MT
中科院分区:
文献类型:
--
作者:
Tang D;Kang R;Livesey KM;Cheh CW;Farkas A;Loughran P;Hoppe G;Bianchi ME;Tracey KJ;Zeh HJ 3rd;Lotze MT
HMGB1 displaces Bcl-2 from Beclin1 to induce and sustain autophagy in response to cell stress. Autophagy clears long-lived proteins and dysfunctional organelles and generates substrates for adenosine triphosphate production during periods of starvation and other types of cellular stress. Here we show that high mobility group box 1 (HMGB1), a chromatin-associated nuclear protein and extracellular damage-associated molecular pattern molecule, is a critical regulator of autophagy. Stimuli that enhance reactive oxygen species promote cytosolic translocation of HMGB1 and thereby enhance autophagic flux. HMGB1 directly interacts with the autophagy protein Beclin1 displacing Bcl-2. Mutation of cysteine 106 (C106), but not the vicinal C23 and C45, of HMGB1 promotes cytosolic localization and sustained autophagy. Pharmacological inhibition of HMGB1 cytoplasmic translocation by agents such as ethyl pyruvate limits starvation-induced autophagy. Moreover, the intramolecular disulfide bridge (C23/45) of HMGB1 is required for binding to Beclin1 and sustaining autophagy. Thus, endogenous HMGB1 is a critical pro-autophagic protein that enhances cell survival and limits programmed apoptotic cell death.
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影响因子:
12.4
作者:
Kang R;Tang D;Schapiro NE;Livesey KM;Farkas A;Loughran P;Bierhaus A;Lotze MT;Zeh HJ
通讯作者:
Zeh HJ
影响因子:
64.8
作者:
Scaffidi, P;Misteli, T;Bianchi, ME
通讯作者:
Bianchi, ME
DOI:
10.1073/pnas.0408345102
发表时间:
2004-12-28
影响因子:
11.1
作者:
Shao, YF;Gao, ZH;Jiang, XJ
通讯作者:
Jiang, XJ
影响因子:
7.8
作者:
Bjorkoy, Geir;Lamark, Trond;Brech, Andreas;Outzen, Heidi;Perander, Maria;Overvatn, Aud;Stenmark, Harald;Johansen, Terje
通讯作者:
Johansen, Terje
影响因子:
4.4
作者:
Tang, Daolin;Kang, Rui;Xiao, Xianzhong
通讯作者:
Xiao, Xianzhong