RESUMO
In order to study the effect and its potential mechanism of metformin combined with cisplatin treatment on human osteosarcoma MG-63 cells, MG-63 cells were treated with metformin and cisplatin and the cell proliferation and apoptosis were detected using CCK8 and flow cytometry; Cell clone formation experiment was performed to detect clone formation rate in each group; Trans well experiment was used to detect the migration and invasion ability of osteosarcoma MG-63 cells, and qPCR and Western blot were used to detect the expression of RNA and protein of apoptosis-related genes. The results showed that metformin combined with cisplatin inhibited the proliferation of human osteosarcoma MG-63 cells and promoted their apoptosis significantly (P < 0. 01); Metformin combined with cisplatin inhibited the clone formation (P < 0. 01), and the migration and invasion of human osteosarcoma MG-63 cells (P < 0. 01); Furthermore, metformin combined with cisplatin down-regulated the expression of apoptosis-related genes MCl￣1and XIAP (P <0. 01), but up-regulated the expression of apoptosis-related genes CASPASE￣3 and Cyto C (P <0. 01) and migration and invasion related genes MMP￣2 and MMP￣9 (P <0. 01). Our study indicated that metformin combined with cisplatin inhibited proliferation, promoted cell apoptosis through MCl￣1 and XIAP, and inhibited cell migration and invasion by regulating the MMP￣2 and MMP￣9 pathways in human osteosarcoma MG-63 cells.