Systematic replacement of amides by 1,4-disubstituted[1,2,3]triazoles in Leu-enkephalin and the impact on the delta opioid receptor activity
作者:Arnaud Proteau-Gagné、Kristina Rochon、Mélissa Roy、Pierre-Julien Albert、Brigitte Guérin、Louis Gendron、Yves L. Dory
DOI:10.1016/j.bmcl.2013.08.020
日期:2013.10
Using Cu(I)-catalyzed azide-alkyne cycloaddition in a mixed classical organic phase and solid phase peptide synthesis approach, we synthesized four analogs of Leu-enkephalin to systematically replace amides by 1,4-disubstituted[1,2,3] triazoles. The peptidomimetics obtained were characterized by competitive binding, contractility assays and ERK1/2 phosphorylation. The present study reveals that the analog bearing a triazole between Phe and Leu retains some potency, more than all the others, suggesting that the hydrogen bond acceptor capacity of the last amide of Leu-enkephalin is essential for the biological activity of the peptide. (C) 2013 Elsevier Ltd. All rights reserved.