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Eur J Pharm Sci. 2014 Oct 15;63:147-53. doi: 10.1016/j.ejps.2014.07.005. Epub 2014 Jul 19.

Clinical pharmacology of ponesimod, a selective S1P₁ receptor modulator, after uptitration to supratherapeutic doses in healthy subjects.

Author information

1
Department of Clinical Pharmacology, Actelion Pharmaceuticals Ltd., Allschwil, Switzerland. Electronic address: matthias.hoch@actelion.com.
2
Department of Clinical Pharmacology, Actelion Pharmaceuticals Ltd., Allschwil, Switzerland.
3
Quintiles Drug Research Unit at Guy's Hospital, London, United Kingdom.

Abstract

PURPOSE:

The aim of this study was to assess in healthy subjects the safety, tolerability, pharmacokinetics, and pharmacodynamics of ponesimod, an oral selective sphingosine-1-phosphate receptor 1 (S1P1) modulator in development for multiple sclerosis, by using an uptitration scheme up to supratherapeutic doses.

METHODS:

This was a double-blind, placebo-controlled, randomised, parallel group, uptitration study. Male and female subjects received ascending oral doses of ponesimod (n=12) or placebo (n=4) once daily for 3 days at each dose level (10-20-40-60-80-100mg).

RESULTS:

The most frequent adverse events were chest discomfort, headache, dizziness, dyspnoea, abdominal pain, and night sweats. Chest discomfort and dyspnoea were considered dose-limiting. A transient decrease in heart rate was observed following the first 10-mg ponesimod dose (maximum mean decrease of 9 beats per minute (bpm) (placebo: 2 bpm)). After uptitration, effects on heart rate were indistinguishable from placebo. A dose-dependent effect on pulmonary function tests was observed and reached a plateau with 60-80 mg ponesimod (maximum mean decrease from baseline of 1.24l (-30.5%) in forced expiratory volume in 1s). A plateau in mean lymphocyte count reduction of approximately 70% from baseline was reached at the 40 mg dose level. Observed effects were fully reversible within 10days after treatment discontinuation. No relevant sex differences were observed.

CONCLUSIONS:

At supratherapeutic doses, symptoms of chest discomfort and dyspnoea were dose-limiting. An uptitration dosing scheme is to be preferred in clinical studies in patients in order to limit effects of ponesimod on heart rate and atrioventricular (AV) conduction.

KEYWORDS:

Heart rate reduction; Pharmacodynamics; Pharmacokinetics; Ponesimod; S1P(1) receptor modulator; Safety and tolerability

PMID:
25046167
DOI:
10.1016/j.ejps.2014.07.005
[Indexed for MEDLINE]

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