| Description |
Ozanimod is a potent and selective S1P1 and S1P5 receptor agonist with EC50s of 410±160 pM and 11±4.3 nM in [35S]-GTPγS binding, respectively.
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| Related Catalog |
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| Target |
EC50: 410±160 pM (S1P1 receptor), 11±4.3 nM (S1P5 receptor)[1]
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| In Vitro |
Ozanimod (RPC1063) is a potent sphingosine-1-phosphate receptor-1 (S1P1) and receptor-5 (S1P5) agonist. The EC50 values are subnanomolar for S1P1 receptors whether measuring inhibition of cAMP generation (160±60 pM) or [35S]-GTPγS binding (410±160 pM). The EC50 value for S1P5 receptor whether measuring inhibition [35S]-GTPγS binding (11±4.3 nM). Ozanimod demonstrates agonist activity at the S1P5 receptor [11±4.3 nM and 83% Emax (percentage of maximum stimulation)]. To determine whether Ozanimod induces sustained S1P1 receptor internalization, S1P1 receptor-HEK293T cells are incubated with different doses of Ozanimod in the presence of 10 μM cycloheximide to prevent translation of new S1P1 receptor protein. Cells are analysed after 1 h treatment, or, after the 1 h treatment washed thoroughly to remove Ozanimod and incubated with 1 μM Cycloheximide for a further 24 h. After a 1 h treatment Ozanimod induces significant loss of S1P1 receptor cell surface expression, similar in magnitude and potency to that seen with FTY720-P-treated cells. Following 1 h of treatment and a 24 h washout period, Ozanimod demonstrates a dose-dependent effect on S1P1 receptor re-expression on the cell surface, with near complete and sustained loss of cell surface receptor expression at concentrations above 10 nM[1].
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| In Vivo |
Ozanimod (RPC1063) is specific for S1P1 and S1P5 receptors, induces S1P1 receptor internalization and induces a reversible reduction in circulating B and CCR7+ T lymphocytes in vivo. Ozanimod shows high oral bioavailability and volume of distribution, and a circulatory half-life that supports once daily dosing. Oral Ozanimod reduces inflammation and disease parameters in all three autoimmune disease models[1].
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| Cell Assay |
Representative histograms of transfected HEK293T cells expressing S1P1 receptors incubated with vehicle control or 1 μM RPC1063. HEK293T cells are incubated with increasing doses of Ozanimod (0.01 nM, 0.1 nM, 1 nM, 10 nM, 100 nM, 1 μM and 10 μM) for 1 h, or for 1 h followed by extensive washing to remove compound, then a 24 h recovery period and cell surface receptor expression is monitored[1].
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| Animal Admin |
Mice[1] Female C57BL/6 mice (60 total, 10 weeks of age) are immunized with Myelin Oligodendrocyte Glycoproteins (MOG) 35-55 peptide with complete Freund's adjuvant on day 0, and pertussis toxin is administered 2 h and 24 h later. At the first instance of clinical symptoms of EAE (limp tail), mice are randomized into treatment groups (n=10 per group) and administered the test compound, p.o., once daily for 14 days. Mice that develop disease earlier than 9 days post-immunization are not enrolled, as these often develop fulminant disease that does not respond to therapy. Test compounds are 0.2 and 0.6 mg/kg Ozanimod, 3 mg/kg FTY720 or vehicle (5% DMSO, 5% Tween-20, 90% 0.1 N HCl). Animals are monitored daily for body weight and clinical symptoms and scored. At the end of the study, mice are anaesthetized via inhalation of isoflurane bubbled with oxygen at 10-20 kPa, blood drawn via cardiac puncture to exsanguination and analysed by a veterinary haemoanalyser.
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| References |
[1]. Scott FL, et al. Ozanimod (RPC1063) is a potent sphingosine-1-phosphate receptor-1 (S1P1 ) and receptor-5 (S1P5 ) agonist with autoimmune disease-modifying activity. Br J Pharmacol. 2016 Jun;173(11):1778-92.
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