miR-183 promotes apoptosis in osteosarcoma cells. (A) Flow cytometry analysis of transfected cells was performed and (B) quantified. (C) Apoptosis in miR-183 mimic-transfected, control and NC cells was detected using a TUNEL assay (magnification ×200) and (D) analyzed. **P<0.01 vs. the control group. miR, microRNA; NC, negative control; PI, propidium iodide; FITC, fluorescein isothiocyanate.