Control of tumor bioenergetics and survival stress signaling by mitochondrial HSP90s.

Control of tumor bioenergetics and survival stress signaling by mitochondrial HSP90s.
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DOI:
10.1016/j.ccr.2012.07.015
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发表时间:
2012-09-11
期刊:
影响因子:
50.3
通讯作者:
Altieri DC
Altieri DC
中科院分区:
医学1区
文献类型:
--
作者:
Chae YC;Caino MC;Lisanti S;Ghosh JC;Dohi T;Danial NN;Villanueva J;Ferrero S;Vaira V;Santambrogio L;Bosari S;Languino LR;Herlyn M;Altieri DC

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Tumors successfully adapt to constantly changing intra- and extra-cellular environments, but the wirings of this process are still largely elusive. Here, we show that Heat Shock Protein 90 (HSP90)-directed protein folding in mitochondria, but not cytosol, maintains energy production in tumor cells. Interference with this process activates a signaling network that involves phosphorylation of nutrient-sensing AMP-activated kinase (AMPK), inhibition of rapamycin-sensitive mTOR complex 1 (mTORC1), induction of autophagy, and expression of an endoplasmic reticulum (ER) unfolded protein response (UPR). This signaling network confers a survival and proliferative advantage to genetically disparate tumors, and correlates with worse outcome in lung cancer patients. Therefore, mitochondrial HSP90s are adaptive regulators of tumor bioenergetics, and tractable targets for cancer therapy.
AMP激活的蛋白激酶对ULK1(HATG1)的磷酸化将能量传感连接到线粒体。
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