Abstract
MiR-99a-5p participates in processes and pathogenesis of varying diseases. However, the molecular mechanism of miR-99a-5p in human cervical squamous cell carcinoma (CSCC) remains unclear. Here, we found that miR-99a-5p was lowly expressed in CSCC cells and negatively associated with overall survival. In addition, cellular experiments including CCK8, wound healing, Transwell and flow cytometry assays disclosed that transfection of miR-99a-5p mimic could suppress the cell activity, cell migratory, and invasive abilities, and promote cell apoptosis, thus inhibiting the tumor progression of CSCC cells. Luciferase reporter gene assay indicated that miR-99a-5p targeted 3'-UTR of CDC25A. Also, enforced CDC25A level rescued the impact of miR-99a-5p on CSCC progression. Silencing CDC25A could restrain the mRNA and protein levels of IL-6 in CSCC. CDC25A overexpression or IL-6 treatment could attenuate inhibiting impact of miR-99a-5p overexpression on epithelial-mesenchymal transition (EMT). These findings suggested that miR-99a-5p may play an anti-tumor role in tumor metastasis by targeting CDC25A/IL6 to hamper EMT process, which revealed a novel molecular mechanism in CSCC.
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