A 922500 (DGAT-1 Inhibitor 4a) is an inhibitor of human and mouse DGAT-1 with IC50 values of 7 nM and 24 nM, respectively, demonstrating good selectivity over related acyltransferases, hERG, and a panel of anti-targets.

DGAT-1 (human):7 nM, DGAT-1 (mouse):24 nM

A 922500 inhibits the phylogenetic family members acyl coenzyme A cholesterol acyltransferase-1 and -2 with IC50 of 296 μM. [1] A 922500 potently inhibits huDGAT-1 and mseDGAT-1. [2]

Zucker fatty rats and diet-induced dyslipidemic hamsters are dosed orally with A 922500 (0.03, 0.3, and 3 mg/kg) for 14 days. Serum triglycerides ae significantly reduced by the 3 mg/kg dose of A 922500 in both the Zucker fatty rat (39%) and hyperlipidemic hamster (53%). These serum triglyceride changes are accompanied by significant reductions in free fatty acid levels by 32% in the Zucker fatty rat and 55% in the hyperlipidemic hamster. In addition, high-density lipoprotein-cholesterol is significantly increases (25%) in the Zucker fatty rat by A 922500 administered at 3 mg/kg. [1] A 922500 confers weight loss and a reduction in liver triglycerides when dosed chronically in DIO mice and depletes serum triglycerides following a lipid challenge in a dose-dependent manner, thus, reproducing major phenotypical characteristics of DGAT-1(-/-) mice. [2] A 922500 (0.03, 0.3 and 3 mg/kg, p.o.) dose-dependently attenuates the maximal postprandial rise in serum triglyceride concentrations. [3]