Overexpression of miR-296-3p inhibits non-small-cell lung cancer cell viability, migration and invasion. (A) A549 cells were transfected with miR-296-3p mimics and miR-NC. The transfection efficiency was determined by reverse transcription-quantitative polymerase chain reaction. (B) Cell viability was analyzed by the Cell Counting Kit-8 assay. (C) Wound healing assay was used to measure cell migration (magnification, ×200). (D) Matrigel assay was used to evaluate cell invasion (magnification, ×200). Data are presented as the mean ± standard deviation. **P<0.01 vs. NC. miR, microRNA; NC, negative control; OD, optical density.