ABCG2 and type 2 diabetes mellitus: KEGG pathway analysis indicated that GPR26 might be involved in the cAMP, cGMP-PKG, insulin pancreatic secretion, MAPK, VEGF, oxidative phosphorylation, chemokine, mTOR, autophagy regulation, ABC transporters, T1D, and T2D pathways (Supplement Excel File S3).