ARG1 and non-small cell lung carcinoma: Based on these findings, ZEB2 knockdown was proved to downregulate Arg-1 (PC9-GR: P < 0.01; HCC827-GR: P < 0.05) and IL4 (PC9-GR: P < 0.01; HCC827-GR: P < 0.001), while upregulate the TNF-α (PC9-GR: P < 0.0001; HCC827-GR: P < 0.0001), IL1β (HCC827-GR: P < 0.001), and IL6 (PC9-GR: P < 0.01; HCC827-GR: P < 0.001), indicating its role in M1/M2 polarization in both EGFR-TKI-resistant NSCLC cell lines.