SDF-1α is a substrate of DPP4 enzyme and DPP4 inhibition preserves SDF-1α actions and promotes cardiac recovery after I/R (Pala and Rotella 2013), acute myocardial infarction (Li et al. 2019), or stroke (Chiazza et al. 2018). The gene discussed is CXCL12; the disease is acute myocardial infarction.