We examined ITGA3, ITGB4, ITGB5, and LAMC2 expression in ESCC cell lines and found that LAMC2 and ITGB4 were overexpressed in ESCC cell lines, especially LAMC2, while ITGA3 and ITGB5 were not (Supplementary Figure 1E, F). Here, ITGB4 is linked to esophageal squamous cell carcinoma.