Dimerization of sumatriptan as an efficient way to design a potent, centrally and orally active 5-HT1B agonist
作者:Michel Perez、Petrus J. Pauwels、Catherine Fourrier、Philippe Chopin、Jean-Pierre Valentin、Gareth W. John、M. Marien、Serge Halazy
DOI:10.1016/s0960-894x(98)00090-0
日期:1998.3
A new bivalent ligand of formula 3 which results from the covalent coupling of two sumatriptan molecules with a p-xylyl spacer at the level of the sulfonamide nitrogen has been prepared and evaluated as a 5-HT1B/1D receptors agonist. In vitro experiments at 5-HT1B human cloned receptors (Ki = 0.64 nM; EC50 = 0.58 nM) and at the level of the contraction of the New Zealand white rabbit saphenous vein (pD(2) = 6.6) demonstrate the superior potency of dimer 3 as a 5-HT1B receptor agonist when compared to sumatriptan or zolmitriptan. Interestingly enough, the new bivalent agonist 3 was found to induce hypothermia in the guineapig upon oral administration suggesting good oral activity and access to the brain. (C) 1998 Elsevier Science Ltd. All rights reserved.