TIMD4 and lung carcinoma: 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.