MiR-145 suppresses cell proliferation and motility by inhibiting ROCK1 in hepatocellular carcinoma

Tumour Biology : the Journal of the International Society for Oncodevelopmental Biology and Medicine
Wei DingLan Wang


MicroRNAs (miRNAs) play key roles in cancer development and progression. In the present study, we investigated the role of miR-145 in the progression of hepatocellular carcinoma (HCC). Ten HCC cell lines and samples from 96 patients with HCC were analyzed for the expression of miR-145 by quantitative real-time polymerase chain reaction (qRT-PCR). Overexpression of miR-145 was established by transfecting mimics into HepG2 and QGY-7703 cells. Cell proliferation and cell migration were assessed by cell viability assay and transwell assay. Western blot was to verify ROCK1 as a novel target gene of miR-145. Our results showed that miR-145 was frequently downregulated in HCC tumors and cell lines. Overexpression of miR-145 in HCC cell lines significantly inhibited cell proliferation, migration, and invasion in vitro. ROCK1 was identified as a target of miR-145, and ectopic expression of miR-145 downregulated ROCK1. Together, these findings indicate that miR-145 acts as a tumor suppressor and its downregulation in tumor tissues may contribute to the progression and metastasis of HCC through a mechanism involving ROCK1, suggesting miR-145 as a potential new diagnostic and therapeutic target for the treatment of HCC.


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