p53-mediated senescence impairs the apoptotic response to chemotherapy and clinical outcome in breast cancer.
p53-mediated senescence impairs the apoptotic response to chemotherapy and clinical outcome in breast cancer.
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DOI:
10.1016/j.ccr.2012.04.027
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发表时间:
2012-06-12
期刊:
影响因子:
50.3
通讯作者:
Lozano G
中科院分区:
文献类型:
--
作者:
Jackson JG;Pant V;Li Q;Chang LL;Quintás-Cardama A;Garza D;Tavana O;Yang P;Manshouri T;Li Y;El-Naggar AK;Lozano G
Studies on the role of TP53 mutation in breast cancer response to chemotherapy are conflicting. Here, we show that, contrary to dogma, MMTV-Wnt1 mammary tumors with mutant p53 exhibited a superior clinical response compared to tumors with wild-type p53. Doxorubicin-treated p53-mutant tumors failed to arrest proliferation leading to abnormal mitoses and cell death, while p53 wild-type tumors arrested, avoiding mitotic catastrophe. Senescent tumor cells persisted, secreting senescence-associated cytokines that exhibited autocrine/paracrine activity and mitogenic potential. Wild-type p53 still mediated arrest and inhibited drug response even in the context of a heterozygous p53 point mutation or absence of p21. Thus, we show wild-type p53 activity hinders chemotherapy response and demonstrate the need to reassess the paradigm for p53 in cancer therapy.
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通讯作者:
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影响因子:
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