Effect and mechanism of miRNA to osteosarcoma cell.

MicroRNA has proved to be low expression in many tumor cells. In addition, it was also proved that as a kind of cancer suppressor gene, miR-199a-3p in miRNA can affect the growth and invasion ability of tumor cells. This paper aims to discuss the effect of miRNA to osteosarcoma cell. It used synthetic mature miR-199a-3p sequence simulants to transfect osteosarcoma cell and took negative contrast sequence (NC mimics) transfection cell as negative contrast. After transfection, qRT-PCR was applied to detect the expression quantity of miR-199a-3p in every group. Western blot method was applied to detect the expression level of MCL-(1) protein and shear situation of PARP in groups of cells. Flow cytometry was used for detecting apoptosis rate of cells and the experimental result was made a statistical analysis. The result shows that in cells from experimental group of transfection miR-199a-3p sequence simulants, expression quantity of mi-R-199a-3p significantly increased while MCL⁻¹ protein expression decreased compared to control group. In addition, shear level of PARP protein and apoptosis rate of cells increased. The differences all had statistical significance (P<0.05). It was concluded that miR-199a-3p can effectively promote the apoptosis rate of osteosarcoma cells.