USP10 antagonizes c-Myc transcriptional activation through SIRT6 stabilization to suppress tumor formation.

USP10 antagonizes c-Myc transcriptional activation through SIRT6 stabilization to suppress tumor formation.
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DOI:
10.1016/j.celrep.2013.11.029
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发表时间:
2013-12-26
期刊:
影响因子:
8.8
通讯作者:
Fang D
Fang D
中科院分区:
生物学1区
文献类型:
--
作者:
Lin Z;Yang H;Tan C;Li J;Liu Z;Quan Q;Kong S;Ye J;Gao B;Fang D

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SIRT 6抑癌基因蛋白表达的降低参与肿瘤的发生。SIRT 6蛋白在人类癌症中下调的分子机制仍然未知。使用蛋白质组学方法,我们已经确定了泛素特异性肽酶USP 10,另一种肿瘤抑制因子,作为SIRT 6相互作用蛋白之一。USP 10抑制SIRT 6泛素化以保护SIRT 6免受蛋白酶体降解。USP 10通过SIRT 6以及p53拮抗c-Myc癌基因的转录活性,以抑制细胞周期进展、癌细胞生长和肿瘤形成。为了支持这一结论,我们在人结肠癌中检测到USP 10和SIRT 6蛋白表达的显著降低。我们的研究发现了两个肿瘤抑制基因在调节细胞周期进展和增殖方面的串扰,并表明USP 10功能失调通过SIRT 6降解促进肿瘤发生。
The reduced protein expression of SIRT6 tumor suppressor is involved in tumorigenesis. The molecular mechanisms underlying SIRT6 protein downregulation in human cancers remain unknown. Using a proteomic approach, we have identified the ubiquitin-specific peptidase USP10, another tumor suppressor, as one of the SIRT6-interacting proteins. USP10 suppresses SIRT6 ubiquitination to protect SIRT6 from proteasomal degradation. USP10 antagonizes the transcriptional activity of the c-Myc oncogene through SIRT6, as well as p53, to inhibit cell cycle progression, cancer cell growth, and tumor formation. To support this conclusion, we detected significant reductions in both USP10 and SIRT6 protein expression in human colon cancers. Our study discovered crosstalk between two tumor-suppressive genes in regulating cell cycle progression and proliferation and showed that dysregulated USP10 function promotes tumorigenesis through SIRT6 degradation.
Beclin1 通过调节 USP10 和 USP13 的去泛素化活性来控制 p53 的水平。
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