1. GPCR/G Protein
  2. CRTH2 (GPR44)


Chemoattractant receptor homologous molecule of Th2 cells (CRTH2) has been shown to mediate the chemotaxis of eosinophils, basophils and Th2-type T lymphocytes. The major mast cell product prostaglandin (PG) D(2) is considered to be the principal ligand of CRTH2.

CRTH2 is the most reliable marker for the detection of circulating human type 2 Th and type 2 T cytotoxic cells in health and disease. CRTh2 receptors, expressed on eosinophils, basophils, T-helper 2 cells, macrophages, and neutrophils are known to be involved in chemotaxis and activation of these cells, which form the key events initiating the inflammatory response in allergic diseases.

CRTH2 (GPR44) Related Products (2):

Cat. No. Product Name Effect Purity
  • HY-16768
    Fevipiprant Antagonist 98.73%
    Fevipiprant(QAW039) is a selective, potent, reversible competitive CRTh2 antagonist with an in vitro dissociation constant KD value of 1.1nM at the CRTh2 receptor and an IC50 value of 0.44 nM for inhibition of PGD2-induced eosinophil shape change in human whole blood.
  • HY-15950
    AZD1981 Antagonist 99.52%
    AZD1981 is a potent and selective CRTh2 antagonist; displaces radio-labelled PGD2 from human recombinant DP2 with high potency (pIC50 = 8.4).