Abstract
Aberrant expression of tripartite motif-containing protein28 (TRIM28) has been demonstrated in several human cancers; however, its biological function and related mechanism in cervical cancer remain unclear. In this study, we compared TRIM28 expression between cervical cancer and adjacent normal tissues, and detected significant elevation in TRIM28 expression levels in the cervical cancer tissues. Moreover, TRIM28 overexpression promoted the proliferation, colony formation, and cell cycle progression of cervical cancer cell lines, as well as the growth of xenograft tumors in nude mice, whereas knockdown of TRIM28had the opposite effects. Evaluation of the potential mechanism demonstrated that TRIM28 promoted cervical cancer cell growth by activating the mammalian target of rapamycin (mTOR) signaling pathway. In support of this finding, TRIM28-induced cell proliferation was abolished by treatment with everolimus, a specific mTOR inhibitor. These results suggest that TRIM28 plays a pivotal role in cervical cancer cell proliferation and might serve as a potential therapeutic target.
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