To verify that IL‐6 abundant in tumour microenvironment can induce high expression of TIM‐4, lung cancer cell lines (A549 and H1975) were treated with 50 ng/mL IL‐6 for the indicated time points (0, 6, 12 and 24 hours), and TIM‐4 expression was detected by qPCR, Western blot or flow cytometry, respectively. Here, TIMD4 is linked to lung cancer.