DPP4 and cancer: Among them, two glycopeptidases have been broadly related to exert pivotal roles in cancer pathophysiology; dipeptidyl peptidase IV (DPP IV), identical with CD26 or gp110-EC 3.4.14.5-, and neutral endopeptidase (NEP), also CD10 or CALLA glycoprotein-EC 3.4.24.11 - [6-8].