DPP4 and breast cancer: Based on TCGA pan-cancer cohorts, there are 7 kinds of histology in which EZH2-DPP4 axis were enriched in the tumors compared with normal samples, including BRCA (breast cancer), LIHC (liver hepatocellular carcinoma), LUAD (Lung adenocarcinoma), MESO (Mesothelioma), SARC (sarcoma), THCA (thyroid cancer) and UCEC (Figure S7C).