DPP4 and breast cancer: Genes related to multiple cell lineage–progenitor potency (DTR, SOX1, FGFR2, NOTCH1, FOLH1, NEUROG2, FLT3LG, TEKT3, CDH5, FLT4, TEK) and tumor immune response (DPP4/CD26) were upregulated in 9 CRC samples and 20 breast cancer samples, but other endothelial genes (FGF4, SOX2, NRG1, FLT1, CDC2, MCAM, EGFR, FGFR1, BMP1, PECAM1, FGF6, FGF5, VWF) were not (Figure 5).