hcrth2

BI-671800 (AP-761) is a highly specific and potent antagonist of chemoattractant receptor-homologous molecule on Th2 cells (DP2 CRTH2). With IC50 values of 4.5 nM and 3.7 nM for PGD2 binding to CRTH2 in hCRTH2 and mCRTH2 transfected cells, respectively. BI-671800 has the potential to treat poorly controlled asthma[2].

CAY10471 Racemate (TM30089 Racemate) is a potent and highly selective CRTH2 DP2 receptor antagonist. It binds to human CRTH2 DP2, DP1, and TP receptors with Ki values of 0.6, 1200, and >10,000 nM, respectively.

Prostaglandin J2 (PGJ2), a derivative of Prostaglandin D2 (PGD2), serves as a potent agonist for PGD2 receptors (DP), exhibiting affinity constants (K i) of 0.9 nM and 6.6 nM for hDP and hCRTH2 receptors, respectively. It activates cyclic AMP production with an EC50 of 1.2 nM, induces oxidative stress, neuronal apoptosis, and promotes the accumulation of ubiquitinated (Ub) proteins. Notably, PGJ2's neurotoxic properties are implicated in the progression of neurodegenerative diseases such as Alzheimer's (AD) and Parkinson's (PD) [1] [2] [3] [4].