ARF and p53 coordinate tumor suppression of an oncogenic IFN-β-STAT1-ISG15 signaling axis.

ARF and p53 coordinate tumor suppression of an oncogenic IFN-β-STAT1-ISG15 signaling axis.
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DOI:
10.1016/j.celrep.2014.03.026
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发表时间:
2014-04-24
期刊:
影响因子:
8.8
通讯作者:
Weber JD
Weber JD
中科院分区:
生物学1区
文献类型:
--
作者:
Forys JT;Kuzmicki CE;Saporita AJ;Winkeler CL;Maggi LB Jr;Weber JD

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ARF和p53肿瘤抑制因子被认为在响应各种致癌信号时以线性途径阻止细胞转化。在这里,我们发现p53功能的丧失导致ARF蛋白水平的增加,其功能是通过抑制IFN-β-STAT1-ISG15信号轴来限制p53缺陷细胞的增殖和致瘤性。p53和ARF共同失活的人类三阴性乳腺癌(TNBC)肿瘤样品显示STAT1和ISG15的高表达,并且TNBC细胞系对STAT1缺失敏感。我们提出p53功能的丧失和随后的ARF诱导产生了选择性的压力使ARF失活,并提出含有ARF和p53共同失活的肿瘤将受益于针对STAT1和ISG15激活的治疗。
The ARF and p53 tumor suppressors are thought to act in a linear pathway to prevent cellular transformation in response to various oncogenic signals. Here we show that loss of p53 function leads to an increase in ARF protein levels which function to limit the proliferation and tumorigenicity of p53-deficient cells by inhibiting an IFN-β-STAT1-ISG15 signaling axis. Human triple-negative breast cancer (TNBC) tumor samples with co-inactivation of p53 and ARF exhibit high expression of both STAT1 and ISG15, and TNBC cell lines are sensitive to STAT1 depletion. We propose that loss of p53 function and subsequent ARF induction creates a selective pressure to inactivate ARF, and propose that tumors harboring co-inactivation of ARF and p53 would benefit from therapies targeted against STAT1 and ISG15 activation.
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