作者:Nicolas Richy、Daad Sarraf、Xavier Maréchal、Naëla Janmamode、Rémy Le Guével、Emilie Genin、Michèle Reboud-Ravaux、Joëlle Vidal
DOI:10.1016/j.ejmech.2018.01.013
日期:2018.2
Starting from the X-ray structure of our previous tripeptidic linear mimics of TMC-95A in complex with yeast 20S proteasome, we introduced new structural features to induce a differential inhibition between human constitutive and immunoproteasome 20S particles. Libraries of 24 tripeptidic and 6 dipeptidic derivatives were synthesized. The optimized preparation of 3-hydroxyoxindolyl alanine residues from tryptophan and their incorporation in peptides were described. Several potent inhibitors of human constitutive proteasome and immunoproteasome acting at the nanomolar level (IC50 = 7.1 nM against the chymotrypsin-like activity for the best inhibitor) were obtained. A cytotoxic effect at the submicromolar level was observed against 6 human cancer cell lines. (C) 2018 Elsevier Masson SAS. All rights reserved.