Dipeptidyl peptidase-4 (DPP-4) is one of the widely explored novel targets for type 2 diabetes mellitus (T2DM) strategy to preserve the endogenous glucagon like peptide (GLP)-1 activity by inhibiting the DPP-4 action.
Trelagliptin exhibits potent inhibitory activity toward DPP-4 prepared from Caco-2 cells with an IC50 value of 5.4 nM. Trelagliptin also inhibits human, dog, and rat plasma DPP-4 activity with IC50 values of 4.2 nM, 6.2 nM, and 9.7 nM, respectively.
Trelagliptin is highly selective for DPP-4 and displays IC50 values >100,000 nM corresponding to >10,000-fold selectivity over DPP-2, DPP-8, DPP-9, PEP and FAPα activities. Trelagliptin shows DPP4 selective about 4- and 12-fold more potent than alogliptin and sitagliptin , respectively.