Novel tricyclic antagonists of the prostaglandin D2 receptor DP2 with efficacy in a murine model of allergic rhinitis.
Stearns BA, Baccei C, Bain G, Broadhead A, Clark RC, Coate H, Evans JF, Fagan P, Hutchinson JH, King C, Lee C, Lorrain DS, Prasit P, Prodanovich P, Santini A, Scott JM, Stock NS, Truong YP.
The synthesis of a series of tricyclic antagonists for the prostaglandin D(2) receptor DP2 (CRTH2) is disclosed. The activities of the compounds were evaluated in a human DP2 binding assay and a human whole blood eosinophil shape change assay. Potential metabolic liabilities of the compounds were addressed through in vitro CYP studies. The lead compound was demonstrated to have efficacy in a mouse model of allergic rhinitis following oral dosing.