CXCL10 and neoplasm: DPP4 enzymatic activity has been shown to reduce both T‐cell and eosinophil migration to sites of tumor by inactivating the T‐cell chemokine CXCL10[8b] and the eosinophil chemokine CCL11.[8c] Here, we extended these findings by showing the nonenzymatic activity of DPP4 in cell migration.