The expression of miR-6883-5p in the serum of bladder cancer patients and its effect on the migration and proliferation of bladder cancer cells / 中国医师杂志

ABSTRACT

Objective:To explore the expression of miR-6883-5p in the serum of bladder cancer patients and its effect on the migration and proliferation ability of bladder cancer cells.Methods:The real-time fluorescent quantitative polymerase chain reaction (qRT-PCR) method was used to detect the expression level of miR-6883-5p in the serum of 39 patients with bladder cancer and 39 healthy subjects, as well as the expression level of miR-6883-5p in normal bladder mucosal epithelial cells and bladder cancer cells. The bladder cancer cells with the lowest expression of miR-6883-5p were transfected with miR-6883-5p mimics or negative control (NC), namely miR-6883-5p group and NC group. Transwell migration experiment and cell counting kit-8 (CCK-8) colorimetric method were used to detect the migration and proliferation ability of cells transfected with miR-6883-5p. Bioinformatics software and dual luciferase reporter gene were used to predict and test the target genes of miR-6883-5p. qRT-PCR and Western blot were used to detect the expression levels of target genes in cells transfected with miR-6883-5p.Results:The expression level of miR-6883-5p in the serum of bladder cancer patients was significantly lower than that of healthy persons ( P<0.01). The expression level of miR-6883-5p in bladder cancer cells was significantly lower than that in normal bladder mucosal epithelial cells (all P<0.05), and the lowest expression of miR-6883-5p was in 5637 cells ( P<0.01). After transfection with miR-6883-5p, the migration and proliferation of cells in miR-6883-5p group were significantly lower than those in NC group (all P<0.05). Phosphatidyl alcohol proteoglycan-6 (GPC6) was the target gene of miR-6883-5p. After transfection with miR-6883-5p, the expression levels of GPC6 mRNA and protein in miR-6883-5p group significantly decreased ( P<0.01). Conclusions:miR-6883-5p is significantly low expressed in the serum of bladder cancer patients, and miR-6883-5p is related to the occurrence and development of bladder cancer; overexpression of miR-6883-5p can inhibit the migration and proliferation of bladder cancer cells; miR-6883-5p can inhibit the occurrence and development of bladder cancer by down-regulating the expression of GPC6.