miR-34 cooperates with p53 in suppression of prostate cancer by joint regulation of stem cell compartment.

miR-34 cooperates with p53 in suppression of prostate cancer by joint regulation of stem cell compartment.
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DOI:
10.1016/j.celrep.2014.02.023
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发表时间:
2014-03-27
期刊:
影响因子:
8.8
通讯作者:
Nikitin AY
Nikitin AY
中科院分区:
生物学1区
文献类型:
--
作者:
Cheng CY;Hwang CI;Corney DC;Flesken-Nikitin A;Jiang L;Öner GM;Munroe RJ;Schimenti JC;Hermeking H;Nikitin AY

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miR-34家族的microRNA最初被鉴定为p53的直接反式激活靶点,并且是推定的肿瘤抑制因子。令人惊讶的是,缺乏所有mir-34基因的小鼠在18个月大时没有显示出癌症形成的增加,因此怀疑先前研究的生理相关性。在这里,我们报告说,小鼠与前列腺上皮特异性失活的mir-34和p53显示前列腺干细胞室的扩张,并发展早期浸润性腺癌和高级别的前列腺上皮内瘤,而没有这样的病变后,单独失活的mir-34或p53基因的15个月的年龄观察。一致地,p53和miR-34的组合缺陷导致前列腺干/祖细胞的MET依赖性生长、自我更新和运动的加速。我们的研究提供了直接的遗传学证据,证明mir-34基因是真正的肿瘤抑制因子,并确定了p53/miR-34联合控制MET表达是前列腺干细胞区室调节的关键组成部分,其畸变可能导致癌症。
MicroRNAs of miR-34 family have been originally identified as direct transactivation target of p53 and are putative tumor suppressors. Surprisingly, mice lacking all mir-34 genes show no increase in cancer formation by 18 months of age, hence placing in doubt physiological relevance of previous studies. Here we report that mice with prostate epithelium-specific inactivation of mir-34 and p53 show expansion of prostate stem cell compartment, and develop early invasive adenocarcinomas and high-grade prostatic intraepithelial neoplasia, whereas no such lesions are observed after inactivation of mir-34 or p53 genes alone by 15 months of age. Consistently, combined deficiency for p53 and miR-34 leads to acceleration of MET-dependent growth, self-renewal, and motility of prostate stem/progenitor cells. Our study provides direct genetic evidence that mir-34 genes are bona fide tumor suppressors, and identifies p53/miR-34 joint control of MET expression as a key component of prostate stem cell compartment regulation, aberrations of which may lead to cancer.
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