TCF7L2 and type 2 diabetes mellitus: As a result, genes such as CDKAL1, SLC30A8, HHEX, EXT2, IGF2BP2, CDKN2B, LOC387761, FTO, KCNQ1, TCF7L2, and BCL11A have been reported to be susceptible genes for T2DM [6], [31], [32].