Using the Expression Atlas database (Papatheodorou et al., 2020), which includes RNA sequencing datasets from human cancer cell lines, we generated a heatmap showing the expression levels of PD-L1, EMT regulators (MCL-1 and Snail), epithelial markers (E-cadherin and ZO-1) and mesenchymal markers (Vimentin and HSP47) in three aggressive EC cell lines (HEC-1, HEC-50, and KLE). This evidence concerns the gene SNAI1 and cancer.