As shown in Figure 5C and Figure S8D, the expression level of E‐cadherin and ZO‐1 was decreased, and that of vimentin, MMP‐2, MMP‐9, TWIST, SLUG, SNAIL, ZEB1 and N‐cadherin was significantly increased in CCL2 overexpressed NSCLC cells. The gene discussed is MMP9; the disease is non-small cell lung carcinoma.