DPP4 and neoplasm: Among them, the expression of TIPRAP, WSCD1, TCP11L2, DPP4, CAB39 and PDPK1 were down-regulated, while PARP1, DEPDC1B, CKAP2, ORMDL2, MRPL44, POLD4 and TMEM187 were increased in tumor group (Supplementary Figure S5A).