For research use only.

Catalog No.S2822

OC000459 Chemical Structure

CAS No. 851723-84-7

OC000459 is a potent and selective D prostanoid receptor 2 (DP2) antagonist with IC50 of 13 nM. Phase 2.

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Biological Activity

Description OC000459 is a potent and selective D prostanoid receptor 2 (DP2) antagonist with IC50 of 13 nM. Phase 2.
DP2 [1]
13 nM
In vitro

OC000459 inhibits the binding of [3H]PGD2 to membranes from CHO cells transfected with human DP2 with Ki of 13 nM. OC000459 also displaces [3H]PGD2 from membranes from human Th2 lymphocytes with Ki of 4 nM. OC000459 antagonizes PGD2-mediated calcium mobilization in a concentration-dependent manner with IC50 of 28 nM in intact CHO cells expressing DP2. OC000459 inhibits chemotaxis of human Th2 cells in response to PGD2 (10 nM) with IC50 of 28 nM. OC000459 (< 3 μM) antagonizes the effect of PGD2 competitively in both the isolated leukocyte preparation and heparinized human whole blood. OC000459 inhibits eosinophil shape change responses to DK-PGD2 with IC50 of 11 nM. OC000459 (1 μM) inhibits the activation of Th2 cells and eosinophils in response to mast cell supernatants. [1]

In vivo OC000459 administrated at doses of 2 mg/kg p.o. in the Sprague-Dawley rats shows plasma half-life of 2.9 hours, time that maximal plasma concentration is achieved of 1.3 hours, maximal plasma concentration achieved is 1.54 μg/mL. OC000459 orally administrated 0.5 hour before injection of DK-PGD2 leads to a dose-dependent reduction in blood eosinophilia with ED50 of 0.04 mg/kg in rats. OC000459 orally administrated 0.5 hour before injection of DK-PGD2 also leads to a dose-dependent inhibition eosinophil accumulation ED50 of 0.01 mg/kg in rats. [1] OC000459 (200 mg twice daily for 28 days) administrated in patients with moderate persistent asthma shows improvement in quality of life as analysed for both the Full Analysis (FA) population and the Per Protocol (PP) population. In those patients, OC000459 improves the night-time symptom scores, reduces the geometric mean sputum eosinophil count and respiratory infections. [2] OC000459 (200 mg twice daily) treatment inhibits the later asthmatic responses and the post allergen increase in sputum eosinophils in steroid naive asthmatic patients. [3]


Animal Research:[1]
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  • Animal Models: Sprague-Dawley rats
  • Dosages: 10 mg/kg
  • Administration: Orally
    (Only for Reference)

Solubility (25°C)

In vitro DMSO 4 mg/mL (11.48 mM)
Water Insoluble
Ethanol Insoluble

* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.

Chemical Information

Molecular Weight 348.37


CAS No. 851723-84-7
Storage powder
in solvent
Synonyms N/A
Smiles CC1=C(C2=C(N1CC(=O)O)C=CC(=C2)F)CC3=NC4=CC=CC=C4C=C3

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Clinical Trial Information

NCT Number Recruitment interventions Conditions Sponsor/Collaborators Start Date Phases
NCT02560610 Completed Drug: OC000459|Drug: Placebo Severe Eosinophilic Asthma Chiesi Farmaceutici S.p.A.|Atopix Therapeutics Ltd. September 2016 Phase 2
NCT01056783 Completed Drug: OC000459|Drug: Placebo Eosinophilic Esophagitis Oxagen Ltd August 2010 Phase 2
NCT01056575 Completed Drug: OC000459 Healthy Volunteers Oxagen Ltd February 2010 Phase 1
NCT01448902 Completed Drug: OC000459|Drug: Placebo Allergic Rhinitis Oxagen Ltd March 2007 Phase 2

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Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID