miR-381-3p suppresses OSCC growth by downregulating FGFR2. A. SCC-9 cells were transfected with FGFR2 siRNA or negative control. After 48 h, the FGFR2 protein level was examined via western blot analysis. B. MTT, cell cycle and apoptosis assays. C. SCC-9 cells were infected with NC, miR-381-3p lentivirus or miR-381-3p and FGFR2 lentivirus. After 48 h, FGFR2 protein levels were examined via western blot analysis. D. MTT, cell cycle and cell apoptosis assays. Data represent means ± SD of three independent experiments. *P < 0.05 vs. NC group, $P < 0.05 vs. miR-381-3p group.