miR-629-3p induces CDDP resistance in several head and neck cancer cell lines. (A,D) Morphology of HSC-3 cells and HCS-4 (scale bar, 500 µm) and the sensitivity to CDDP in miR-210-3p-, miR-629-3p-, miR-874-3p-, or NC-expressing HCS-3 and HCS-4 cells, respectively. (B,E) Caspase 3/7 activity assay of miR-210-3p, miR-629-3p, miR-874-3p, or NC-expressing HCS-3 cells and HCS-4 cells, respectively. (C,F) Representative images (left) and relevant quantification (right) of migration assays in miR-210-3p-, miR-629-3p-, miR-874-3p-, or NC-expressing HCS-3 cells and HCS-4 cells, respectively. Scale bar, 100 µm.