Abstract
Ovarian cancer is the most lethal gynecological malignancy worldwide. A better understanding of the pathogenesis of ovarian cancer may help to improve the overall survival. Our previous studies have demonstrated that alpha-(1,2)-fucosyltransferase 1 (FUT1) is an oncogenic glycogene in ovarian cancer. However, the underlying mechanism is not fully clarified. In this study, we identified a microRNA as an important downstream regulator for the carcinogenic effect of FUT1 in ovarian cancer. miR-5193 was found down-regulated in ovarian cancer cells, FUT1-overexpression ovarian cancer cells and ovarian tumor samples. MTT, flow cytometry and Transwell assays demonstrated that miR-5193 inhibited the proliferation and migration, and induced the cell cycle arrest and apoptosis of ovarian cancer cells. Real-time PCR and western blot assays showed that miR-5193 downregulated the expression of TRIM11 and upregulated the expression of p53 and p21. Dual luciferase reporter assay indicated that TRIM11 was a direct target of miR‑5193. Rescue experiments confirmed that miR-5193 functioned in ovarian cancer cells by directly targeting TRIM11. Moreover, transfection with miR-5193 mimic in FUT1-overexpression ovarian cancer cells reversed the carcinogenic effect of FUT1. Taken together, our results suggest that miR-5193 is an essential suppressor of human ovarian cancer development, and is an important downstream regulator regarding the carcinogenesis of FUT1 in ovarian cancer.