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Ghotas Evindar Sylvie G. Bernier Malcolm J. Kavarana Elisabeth Doyle Jeanine Lorusso Michael S. Kelley Keith Halley Amy Hutchings Albion D. Wright Ashis K. Saha Gerhard Hannig Barry A. Morgan William F. Westlin 《Bioorganic & medicinal chemistry letters》2009,19(2):369-372
In the design of potent and selective sphingosine-1-phosphate receptor agonists, we were able to identify two series of molecules based on phenylamide and phenylimidazole analogs of FTY-720. Several designed molecules in these scaffolds have demonstrated selectivity for S1P receptor subtype 1 versus 3 and excellent in vivo activity in mouse. Two molecules PPI-4621 (4b) and PPI-4691 (10a), demonstrated dose responsive lymphopenia, when administered orally. 相似文献
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Ghotas Evindar Alexander L. Satz Sylvie G. Bernier Malcolm J. Kavarana Elisabeth Doyle Jeanine Lorusso Nazbeh Taghizadeh Keith Halley Amy Hutchings Michael S. Kelley Albion D. Wright Ashis K. Saha Gerhard Hannig Barry A. Morgan William F. Westlin 《Bioorganic & medicinal chemistry letters》2009,19(8):2315-2319
In pursuit of potent and selective sphingosine-1-phosphate receptor agonists, we have utilized previously reported phenylamide and phenylimidazole scaffolds to explore extensive side-chain modifications to generate new molecular entities. A number of designed molecules demonstrate good selectivity and excellent in vitro and in vivo potency in both mouse and rat models. Oral administration of the lead molecule 11c (PPI-4667) demonstrated potent and dose-responsive lymphopenia. 相似文献
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Ghotas Evindar Hongfeng Deng Sylvie G. Bernier Elisabeth Doyle Jeanine Lorusso Barry A. Morgan William F. Westlin 《Bioorganic & medicinal chemistry letters》2013,23(2):472-475
In the quest to discover a potent and selective class of direct agonists to the sphingosine-1-phosphate receptor, we explored the carboxylate functional group as a replacement to previously reported lead phosphates. This has led to the discovery of potent and selective direct agonists with moderate to substantial in vivo lymphopenia. The previously reported selectivity enhancing moiety (SEM) and selectivity enhancing orientation (SEO) in the phenylamide and phenylimidazole scaffolds were crucial to obtaining selectivity for S1P receptor subtype 1 over 3. 相似文献
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Ghotas Evindar Sylvie G. Bernier Elisabeth Doyle Malcolm J. Kavarana Alexander L. Satz Jeanine Lorusso Heather S. Blanchette Ashis K. Saha Gerhard Hannig Barry A. Morgan William F. Westlin 《Bioorganic & medicinal chemistry letters》2010,20(8):2520-2524
In pursuit of a potent and highly selective sphingosine-1-phosphate receptor agonists with an improved in vivo conversion of the precursor to the active phospho-drug, we have utilized previously reported phenylamide and phenylimidazole scaffolds to identify a selectivity enhancing moiety (SEM) and selectivity enhancing orientation (SEO) within both pharmacophores. SEM and SEO have allowed for over 100 to 500-fold improvement in selectivity for S1P receptor subtype 1 over subtype 3. Utility of SEM and SEO and further SAR study allowed for discovery of a potent and selective preclinical candidate PPI-4955 (21b) with an excellent in vivo potency and dose responsiveness and markedly improved overall in vivo pharmacodynamic properties upon oral administration. 相似文献
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