Dipeptidyl peptidase IV (DPP4) deactivates glucose-regulating hormones such as GLP-1 and GIP, thus, DPP4 inhibition has become a useful therapy for type 2 diabetes. Optimization of the high-throughput screening lead 6 led to the discovery of 25 (ABT-341), a highly potent, selective, and orally bioavailable DPP4 inhibitor. When dosed orally, 25 dose-dependently reduced glucose excursion in ZDF rats. Amide 25 is safe in a battery of in vitro and in vivo tests and may represent a new therapeutic agent for the treatment of type 2 diabetes.
        
Representative scheme of DPP4N_Peptidase_S9 structure and an image from PDBsum server
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Databases
PDB-Sum
2I78 Previously Class, Architecture, Topology and Homologous superfamily - PDB-Sum server
FSSP
2I78Fold classification based on Structure-Structure alignment of Proteins - FSSP server