Mitochondrial Akt Regulation of Hypoxic Tumor Reprogramming.
Mitochondrial Akt Regulation of Hypoxic Tumor Reprogramming.
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DOI:
10.1016/j.ccell.2016.07.004
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发表时间:
2016-08-08
期刊:
影响因子:
50.3
通讯作者:
Altieri DC
中科院分区:
文献类型:
--
作者:
Chae YC;Vaira V;Caino MC;Tang HY;Seo JH;Kossenkov AV;Ottobrini L;Martelli C;Lucignani G;Bertolini I;Locatelli M;Bryant KG;Ghosh JC;Lisanti S;Ku B;Bosari S;Languino LR;Speicher DW;Altieri DC
Hypoxia is a universal driver of aggressive tumor behavior, but the underlying mechanisms are not completely understood. Using a phosphoproteomics screen, we now show that active Akt accumulates in the mitochondria during hypoxia and phosphorylates pyruvate dehydrogenase kinase 1 (PDK1) on Thr346 to inactivate the pyruvate dehydrogenase complex. In turn, this pathway switches tumor metabolism towards glycolysis, antagonizes apoptosis and autophagy, dampens oxidative stress, and maintains tumor cell proliferation in the face of severe hypoxia. Mitochondrial Akt-PDK1 signaling correlates with unfavorable prognostic markers and shorter survival in glioma patients and may provide an “actionable” therapeutic target in cancer.
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