miR-214-5p increases the radiosensitivity of cervical cancer by targeting ROCK1 expression

Background. The tolerance of cervical cancer to radiotherapy is a major factor affecting treatment outcomes. The miR-214-5p is involved in the regulation of biological processes such as tumor proliferation and metastasis.Objectives. The aim of the study was to explore the role of miR-214-5p and Rho-associated coiled-coil containing protein kinase 1 (ROCK1) in cervical cancer and their response to radiotherapy in cervical cancer patients.Materials and methods. Fifty-three cervical cancer tissue samples were collected to analyze the level of miR-214-5p in patients with different responses to radiotherapy. Cervical cancer cell lines with radiation resistance were selected to explore the role of miR-214-5p in radiosensitivity. The wound healing, transwell migration, clone formation assay, and in vivo analysis were utilized to evaluate the effect of miR-214-5p on the radiation sensitivity of cervical cancer cells.Results. Patients with poor radiotherapy responses demonstrated low levels of miR-214-5p. The upregulation of miR-214-5p decreased migration and invasion ability of radiotherapy-resistant cells. The bioinformatic analysis showed that ROCK1 is a candidate target gene of miR-214-5p, and this was confirmed with dual luciferase reporter assay showing that miR-214-5p directly interacts with the 3'untranslated region (3'UTR) of ROCK1. Decreased ROCK1 improved the radiosensitivity of cervical cancer in vitro and in vivo, and the over expression of ROCK1 decreased the radiosensitivity effect of miR-214-5p in cervical cancer cells.Conclusions. The miR-214-5p can regulate the radiation sensitivity of cervical cancer cells by targeting the mRNA of ROCK1 and regulating its expression.