Prostaglandin D2 Receptor (DP)

) is a Receptor for prostaglandin D2 (PGD2). The activity of this receptor is mainly mediated by G(s) proteins that stimulate adenylate cyclase, resulting in an elevation of intracellular cAMP. A mobilization of calcium is also observed, but without formation of inositol 1,4,5-trisphosphate.Expressed in retinal choroid, ciliary epithelium, longitudinal and circular ciliary muscles, iris, small intestine and platelet membranes. DP₁ is a G-protein-coupled receptor. Its activity is mainly mediated by G-S proteins that stimulate adenylate cyclase resulting in an elevation of intracellular cAMP and Ca²⁺.Knockout studies in mice suggest that the ligand of this receptor, prostaglandin D₂ (PGD₂), functions as a mast cell-derived mediator to trigger asthmatic responses. It also causes vasodilation