TAK-875 is a selective G-protein-coupled receptor 40 agonist in development for the treatment of type 2 diabetes mellitus. In rat insulinoma INS-1 833/15 cells, TAK-875 increased intracellular inositol monophosphate and calcium concentration, consistent with activation of the Gqalpha signaling pathway. The insulinotropic action of TAK-875 (10 uM) in INS-1 833/15 and primary rat islets was glucose-dependent.
In vivo
In an oral glucose tolerance test in type 2 diabetic N-STZ-1.5 rats, TAK-875 (1-10 mg/kg p.o.) showed a clear improvement in glucose tolerance and augmented insulin secretion. TAK-875 (10 mg/kg, p.o.) significantly augmented plasma insulin levels and reduced fasting hyperglycemia in male Zucker diabetic fatty rats, whereas in fasted normal Sprague-Dawley rats, TAK-875 neither enhanced insulin secretion nor caused hypoglycemia even at 30 mg/kg.