AZD1981

AZD1981 is a potent, selective CRTh2 (DP2) receptor antagonist with IC50 of 4 nM, showing >1000-fold selectivity over more than 340 other enzymes and receptors, including DP1. AZD1981 blocks DP2-mediated shape change in human eosinophils and basophils in blood, as well as DP2-mediated chemotaxis of human Th2 cells and eosinophils. what's more, AZD1981 also blocks the binding of [3H]PGD2 to mouse, rat, guinea pig, rabbit and dog recombinant DP2. In guinea pig hind limb model, AZD1981 (100 nM) completely inhibits DK-PGD2-induced eosinophil mobilization.