Upregulation of miR-192-5p inhibited osteosarcoma cell proliferation and induced cell cycle at the G0/G1 stage and cell apoptosis. (A) Reverse transcription-quantitative polymerase chain reaction was performed to measure the expression of miR-192-5p in 143B and U2OS cells following transfection with miR-192-5p-mimics. Overexpression of miR-192-5p significantly restrained the proliferation of (B) 143B and (C) U2OS cells. (D) The cell cycle assay demonstrated that miR-192-5p mimics could prevent the progression of the cell cycle from the G1 to S phase in 143B and U2OS cells. (E) Elevated expression of miR-192-5p markedly induced 143B and U2OS cells apoptosis. Data are presented as the mean ± standard deviation of 3 independent assays. *P<0.05, **P<0.01 and ***P<0.001 vs. miR-NC. miR, microRNA; NC, negative control; FITC, fluorescein isothiocyanate; PI, propidium iodide.