According to Figure 4C and D, the cell number of GKN2 OE A549 and PC9 was lower than that of GKN2 OE A549 and PC9 NC groups (p < 0.01 and p < 0.01, respectively), suggesting that GKN2 inhibited the cell invasion ability of NSCLC. The gene discussed is GKN2; the disease is non-small cell lung carcinoma.