According to the guidebook for chronic kidney disease (CKD) in Japan [11], DPP-4 inhibitors including 50 mg oral vildagliptin once-daily, 6.25 mg alogliptin, and the GLP-1 receptor agonist, liraglutide 0.3 mg injected once-daily, are available for treatment of patients with type 2 diabetes and end-stage renal disease (ESRD). The gene discussed is GLP1R; the disease is type 2 diabetes mellitus.