Mechanisms of microRNA-150, cyclin B1 and mitochondrial-associated protein 2 in regulating apoptosis and inhibiting invasion and migration of Huh-7 hepatocellular carcinoma cells

摘要

Objective: To explore the mechanisms of microRNA-150, cyclin B1 and mitochondrial-associated protein 2 in regulating the apoptosis and inhibiting the invasion and migration of Huh-7 cells. Methods: Huh-7 cells were divided into the control group, the negative control group (NC group) and the miR-150 overexpression group (mimic group). The miR-150 overexpressing cell line was constructed by plasmid transfection. The cell viability and apoptosis were detected by cell counting kit-8 and flow cytometry. The cell migration and invasion capacity were measured by cell wound scratch assay and Transwell. The levels of miRNA and mRNA were detected by real-time quantitative polymerase chain reaction and the relative expression levels of proteins were detected by Western blot. Results: MiR-150 significantly inhibited the cell viability of Huh-7 and promoted its apoptosis (P<0.01). After 24 h of cultivation, the mobility of the control group and the NC group were (83.54±4.66)％and (85.57±4.74)％, respectively. The mobility of the mimic group was (49.63±3.78)％, which was significantly lower than that of the control group and the NC group (P<0.01). After 24 h of cultivation, the invasive rate of the control group and the NC group were (100.56±2.87)％and (101.63±3.74)％, respectively, and the invasive rate of mimic group was (51.63±5.32)％, which was significantly lower than that of the control group and the NC group (P<0.01). The expression levels of cyclin B1 protein and mRNA in the mimic group were significantly lower than those in the control group and the NC group (P<0.01), and the level of mitochondrial-associated protein 2 in the mimic group was significantly higher than that in the control group and the NC group (P<0.01). Conclusions: MiR-150 may inhibit the proliferation, migration, invasion and apoptosis of hepatoma carcinoma cell by regulating cyclin B1 or up-regulating mitochondrial-associated protein 2 levels.