CAY10595 is a mixture of isomers which acts as a potent CRTH2/DP2 receptor antagonist (Ki = 10 nM). The biological effects of prostaglandin D2 (PGD2) are transduced by at least two 7-transmembrane G protein-coupled receptors, designated DP1 and CRTH2/DP2. In humans, CRTH2/DP2 is expressed on eosinophils, basophils and Th2 cells where it mediates the chemotactic activity of PGD2.
