Objective:To study the correlation of microRNA-203 expression with biological features of osteosarcoma cells.Methods:Osteosarcoma tissue and adjacent normal tissue were collected,and miRNA-203 expression levels were detected.Osteosarcoma cell lines MG63 and osteoblast cell lines hFOB1.19 were cultured,and miRNA-203 expression levels in cells was detected.6h,12 h,18hand 24 hafter transfection of miRNA-203 mimics,cell proliferation and invasion ability as well as related gene expression levels were detected.R...