BI-671800 is an antagonist of the prostaglandin D2 receptor CRTH2/DP2 (IC50 = 42 nM in a radioligand binding assay).1 It binds selectively to CRTH2/DP2 over DP1, thromboxane, and prostacyclin receptors (IC50s = 25.6, 62.6, and >100 μM, respectively). BI-671800 inhibits PGD2-induced shape change in human eosinophils (IC50 = 744 nM).
1.Stearns, B.A., Baccei, C., Bain, G., et al.Novel tricyclic antagonists of the prostaglandin D2 receptor DP2 with efficacy in a murine model of allergic rhinitisBioorg. Med. Chem. Lett.19(16)4647-4651(2009)
















