IL6 and non-small cell lung carcinoma: To verify whether up‐regulated TIM‐4 was involved in IL‐6‐induced EMT of NSCLC in vitro, we knocked down TIM‐4 expression by shTIM‐4 lentivirus vector in both A549 and H1975 cells, and then, cells were stimulated with 50 ng/mL IL‐6 for 24 hours.