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
Lozano G
中科院分区:
医学1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

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关于TP 53突变在乳腺癌化疗反应中的作用的研究是相互矛盾的。在这里,我们表明,与教条相反,MMTV-Wnt 1乳腺肿瘤与突变p53表现出上级的临床反应相比,肿瘤与野生型p53。多柔比星治疗的p53突变型肿瘤未能阻止增殖,导致异常有丝分裂和细胞死亡,而p53野生型肿瘤被阻止,避免了有丝分裂灾难。衰老的肿瘤细胞持续存在,分泌衰老相关的细胞因子,表现出自分泌/旁分泌活性和促有丝分裂潜力。野生型p53仍然介导停滞和抑制药物反应,即使在杂合p53点突变或p21缺失的情况下。因此,我们表明野生型p53活性阻碍化疗反应,并证明需要重新评估p53在癌症治疗中的范例。
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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