ABSTRACT
Objective:To investigate the role of MicroRNA-210(miR-210)in the growth process of ovarian cancer cells and its relationship with radiosensitivity,and to elucidate the effect of miR-210 on the development and treatment of ovarian cancer the possible molecular mechanism.Methods:The human ovarian cancer OVCAR3 and SKOV3 cells were cultured in vitro,miR-210 mimic and anti miR-210 inhibitors were transfected into the human ovarian cancer cell lines OVCAR3 and SKOV3,respectively,by cell transfection,and identified by Real-time PCR method;miR-210 overexpression and low expression of ovarian cancer cell models were obtained.The two kinds of cells were divided into control group,miR-210 overexpression model group and miR-210 low expression model group,and the cell proliferation activity was detected by MTT.The cells in control group and miR-210 overexpression model group were irradiated with different doses(30,50,and 100 Gy)of ionizing radiation,and the cell proliferation activity in each group was detected by MTT method.Western blotting method was used to detect the expression levels of apoptosis-related proteins in the ovarian cancer cells exposed to 50 Gy radiation dose.All the experimental cells were cultured with three double holes and repeated three times.Results:Compared with control group,the proliferation activity of the cells in miR-210 overexpression ovarian cancer cells group was enhanced,and the proliferation activity of the cells in miR-210 low expression cells group was reduced(P<0.05).After ionizing radiation,the proliferation activity of ovarian cancer cells in miRNA-210 overexpression group was enhanced compared with control group(P<0.05);the expression levels of apoptosis-related protein BAX in OVCAR3 and SKOV3 cells were significantly decreased,while the expression level of BCL-2 were significantly increased. Conclusion:miR-210 can promote the growth of ovarian cancer cells,and reduce the sensitivity of ovarian cancer cells to radiation therapy by inhibiting the apoptosis.