2. Academic Validation
  3. 2-imino-thiazolidin-4-one derivatives as potent, orally active S1P1 receptor agonists

2-imino-thiazolidin-4-one derivatives as potent, orally active S1P1 receptor agonists

  • J Med Chem. 2010 May 27;53(10):4198-211. doi: 10.1021/jm100181s.
Martin H Bolli 1,  Stefan Abele,  Christoph Binkert,  Roberto Bravo,  Stephan Buchmann,  Daniel Bur,  John Gatfield,  Patrick Hess,  Christopher Kohl,  Céline Mangold,  Boris Mathys,  Katalin Menyhart,  Claus Müller,  Oliver Nayler,  Michael Scherz,  Gunther Schmidt,  Virginie Sippel,  Beat Steiner,  Daniel Strasser,  Alexander Treiber,  Thomas Weller
Affiliations

Affiliation

  • 1 Drug Discovery Chemistry, Actelion Pharmaceuticals Ltd., Allschwil, Switzerland. martin.bolli@actelion.com
PMID: 20446681 DOI: 10.1021/jm100181s
Abstract

Sphingosine-1-phosphate (S1P) is a widespread lysophospholipid which displays a wealth of biological effects. Extracellular S1P conveys its activity through five specific G-protein coupled receptors numbered S1P(1) through S1P(5). Agonists of the S1P(1) receptor block the egress of T-lymphocytes from thymus and lymphoid organs and hold promise for the oral treatment of autoimmune disorders. Here, we report on the discovery and detailed structure-activity relationships of a novel class of S1P(1) receptor agonists based on the 2-imino-thiazolidin-4-one scaffold. Compound 8bo (ACT-128800) emerged from this series and is a potent, selective, and orally active S1P(1) receptor agonist selected for clinical development. In the rat, maximal reduction of circulating lymphocytes was reached at a dose of 3 mg/kg. The duration of lymphocyte sequestration was dose dependent. At a dose of 100 mg/kg, the effect on lymphocyte counts was fully reversible within less than 36 h. Pharmacokinetic investigation of 8bo in beagle dogs suggests that the compound is suitable for once daily dosing in humans.

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