KCNJ15 is relatively highly expressed in the pancreas, especially more prominently in the Langerhans islets, and there is a significant correlation between the KCNJ15-related single nucleotide polymorphism (SNP) rs3746876-T and T2DM (Okamoto et al., 2010; Fukuda et al., 2013). Here, KCNJ15 is linked to type 2 diabetes mellitus.