Non-cell-autonomous tumor suppression by p53.
Non-cell-autonomous tumor suppression by p53.
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DOI:
10.1016/j.cell.2013.03.020
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发表时间:
2013-04-11
期刊:
影响因子:
64.5
通讯作者:
Lowe SW
中科院分区:
文献类型:
--
作者:
Lujambio A;Akkari L;Simon J;Grace D;Tschaharganeh DF;Bolden JE;Zhao Z;Thapar V;Joyce JA;Krizhanovsky V;Lowe SW
The p53 tumor suppressor can restrict malignant transformation by triggering cell-autonomous programs of cell cycle arrest or apoptosis. p53 also promotes cellular senescence, a tumor suppressive program that involves stable cell cycle arrest and secretion of factors that modify the tissue microenvironment. In the presence of chronic liver damage, we show that ablation of a p53-dependent senescence program in hepatic stellate cells increases liver fibrosis and cirrhosis associated with reduced survival, and enhances the transformation of adjacent epithelial cells into hepatocellular carcinoma. p53-expressing senescent stellate cells release factors that skew macrophage polarization towards a tumor-inhibiting M1-state capable of attacking senescent cells in culture, whereas proliferating p53-deficient stellate cells secrete factors that stimulate polarization of macrophages into a tumor-promoting M2-state and enhance the proliferation of premalignant cells. Hence, p53 can act non-cell autonomously to suppress tumorigenesis by promoting an anti-tumor microenvironment, in part, through secreted factors that modulate macrophage function.
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