USP27-mediated Cyclin E stabilization drives cell cycle progression and hepatocellular tumorigenesis.

USP27-mediated Cyclin E stabilization drives cell cycle progression and hepatocellular tumorigenesis.
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USP27 介导的细胞周期蛋白 E 稳定驱动细胞周期进展和肝细胞肿瘤发生

DOI:
10.1038/s41388-018-0137-z
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发表时间:
2018-05
期刊:
影响因子:
8
通讯作者:
Lin Z
Lin Z
中科院分区:
医学1区
文献类型:
--
作者:
Dong L;Yu L;Bai C;Liu L;Long H;Shi L;Lin Z

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Cyclin E的过度表达已经在许多类型的癌症中被发现。然而,潜在的机制仍然是个谜。在此,我们确定了泛素特异性肽酶27 (USP27)是Cyclin E的相互作用因子。我们发现USP27通过负调控Cyclin E的泛素化来促进其稳定性。此外,抑制USP27表达可抑制肝细胞癌的生长、迁移和侵袭。此外,我们在肝细胞癌组织中检测到USP27与Cyclin E表达呈正相关。最后,我们发现USP27的表达被5-氟尿嘧啶(5-FU)处理抑制,USP27的缺失使Hep3B细胞对5-FU诱导的凋亡敏感。USP27介导的细胞周期蛋白E稳定参与肿瘤发生,这表明靶向USP27可能是治疗细胞周期蛋白E异常过表达癌症的一种新的治疗策略。
Overexpression of Cyclin E has been seen in many types of cancers. However, the underlying mechanism remains enigmatic. Herein, we identified ubiquitin-specific peptidase 27 (USP27) as a Cyclin E interactor. We found that USP27 promoted Cyclin E stability by negatively regulating its ubiquitination. In addition, suppression of USP27 expression resulted in the inhibition of the growth, migration, and invasion of hepatocellular carcinoma. Furthermore, we detected a positive correlation between USP27 and Cyclin E expression in hepatocellular carcinoma tissues. Finally, we found that USP27 expression is inhibited by 5-fluorouracil (5-FU) treatment and USP27 depletion sensitizes Hep3B cells to 5-FU-induced apoptosis. USP27-mediated Cyclin E stabilization is involved in tumorigenesis, suggesting that targeting USP27 may represent a new therapeutic strategy to treat cancers with aberrant overexpression of Cyclin E protein.
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