期刊
CELL REPORTS
卷 6, 期 6, 页码 1000-1007出版社
CELL PRESS
DOI: 10.1016/j.celrep.2014.02.023
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资金
- NYSTEM [C023050, C028125]
- NIH [CA096823, NICHD T32HD052471]
- Deutsche Krebshilfe grant [109531]
- NYSTEM Cornell Mammalian Cell Reprogramming Core grant [N08S-004]
- Cornell Comparative Cancer Biology Training Program
- Cornell Vertebrate Genomics Scholarship
The miR-34 family was originally found to be a direct target of p53 and is a group of putative tumor suppressors. Surprisingly, mice lacking all mir-34 genes show no increase in cancer formation by 18 months of age, hence placing the physiological relevance of previous studies in doubt. Here, we report that mice with prostate epithelium-specific inactivation of mir-34 and p53 show expansion of the prostate stem cell compartment and develop early invasive adenocarcinomas and high-grade prostatic intraepithelial neoplasia, whereas no such lesions are observed after inactivation of either the mir-34 or p53 genes alone by 15 months of age. Consistently, combined deficiency of 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 joint control of MET expression by p53 and miR-34 as a key component of prostate stem cell compartment regulation, aberrations in which may lead to cancer.
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