DNMT1 and type 2 diabetes mellitus: The evaluation of the role of DNMT1 in T2DM was performed as part of a genome-wide DNA methylation array study, utilising blood samples from patients with T2DM and healthy (control) individuals, in addition to RIN-m5F rat pancreatic β cells, 293T cells, and male KK and KK.Cg-Ay/J mice (as a T2DM animal model).