[Overexpressed microRNA-93 inhibits the proliferation and promotes apoptosis of A172 glioma cells].

Objective: To investigate the impact of microRNA-93 on the biological behaviors of A172 glioma cells by observing the changes of cell proliferation, cell cycle and apoptosis.
Methods: Real-time quantitative PCR (qRT-PCR) was applied to detect the expression of microRNA-93 in 2 samples of human normal brain tissues, 10 samples of glioma tissues and 5 glioma cell lines. Artificially synthesized microRNA-93 mimic was transiently transfected into A172 glioma cells, and then the expression of microRNA-93 was tested by qRT-PCR. MTT assay was used to detect the cell proliferation of A172 glioma cells; apoptosis and cell cycle of A172 glioma cells were measured by flow cytometry.
Results: MicroRNA-93 was over-expressed in glioma tissues and glioma cell lines as compared with normal samples. The transient transfection of microRNA-93 mimic into A172 glioma cells significantly increased the expression of microRNA-93 in A172 glioma cells, promoted cell proliferation, raised the cell proportion in S phase, reduced the cell proportion in G1 phase, and inhibited cell apoptosis.
Conclusion: MicroRNA-93 was aberrantly over-expressed in glioma tissues and cell lines. Transient transfection of microRNA-93 mimic led to increased proliferation, G1-to-S cell cycle progression and reduced apoptosis in A172 glioma cells, indicating that micro-RNA-93 might be a new target for the diagnosis and treatment of glioma.