DPP4 and cancer: In addition, other regulated biological processes have been described for DPP-4: carcinogenesis, as a possible tumor suppressor in conjunction with CXCL10 and by post-transcriptional modification of cytokines in the regulation of tumor immunity [2], in addition to being a possible biomarker in the diagnosis of different types of cancer [7,8]; immunity modulation by direct regulation of lymphocytes [2] and in the inflammatory response being mediated by cytokines and the catalyst role of DPP-4, characteristic of chronic inflammatory pulmonary, autoimmune, intestinal and other pathologies.