DPP4 and type 2 diabetes mellitus: A number of antidiabetic agents have been developed over the years to treat T2D, with dipeptidyl peptidase IV (DPP-IV) inhibitors being one of the most recent agents to combat it (Gherardo et al., 2011; Akoumianakis et al., 2018; Musoev et al., 2019).