Document Report Card

ID: ALA2069262

Journal: ACS Med Chem Lett

Title: Stimulation of Glucose-Dependent Insulin Secretion by a Potent, Selective sst3 Antagonist.

Authors: Pasternak A, Feng Z, de Jesus R, Ye Z, He S, Dobbelaar P, Bradley SA, Chicchi GG, Tsao KL, Trusca D, Eiermann GJ, Li C, Feng Y, Wu M, Shao Q, Zhang BB, Nargund R, Mills SG, Howard AD, Yang L, Zhou YP.

Abstract: This letter provides the first pharmacological proof of principle that the sst3 receptor mediates glucose-stimulated insulin secretion (GSIS) from pancreatic β-cells. To enable these studies, we identified the selective sst3 antagonist (1R,3R)-3-(5-phenyl-1H-imidazol-2-yl)-1-(tetrahydro-2H-pyran-4-yl)-2,3,4,9-tetrahydro-1H-β-carboline (5a), with improved ion channel selectivity and mouse pharmacokinetic properties as compared to previously described tetrahydro-β-carboline imidazole sst3 antagonists. We demonstrated that compound 5a enhances GSIS in pancreatic β-cells and blocks glucose excursion induced by dextrose challenge in ipGTT and OGTT models in mice. Finally, we provided strong evidence that these effects are mechanism-based in an ipGTT study, showing reduction of glucose excursion in wild-type but not sst3 knockout mice. Thus, we have shown that antagonism of sst3 represents a new mechanism with potential in treating type 2 diabetes mellitus.

CiteXplore: 24900466

DOI: 10.1021/ml200272z