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Dimeric Smac mimetics/IAP inhibitors as in vivo-active pro-apoptotic agents. Part II: Structural and biological characterization.

Abstract
Novel pro-apoptotic, homodimeric and heterodimeric Smac mimetics/IAPs inhibitors connected through head-head (8), tail-tail (9) or head-tail linkers (10), were biologically and structurally characterized. In vitro characterization (binding to BIR3 and linker-BIR2-BIR3 domains from XIAP and cIAP1, cytotoxicity assays) identified early leads from each dimer family. Computational models and structural studies (crystallography, NMR, gel filtration) partially rationalized the observed properties for each dimer class. Tail-tail dimer 9a was shown to be active in a breast and in an ovary tumor model, highlighting the potential of dimeric Smac mimetics/IAP inhibitors based on the N-AVPI-like 4-substituted 1-aza-2-oxobicyclo[5.3.0]decane scaffold as potential antineoplastic agents.
AuthorsDaniele Lecis, Eloise Mastrangelo, Laura Belvisi, Martino Bolognesi, Monica Civera, Federica Cossu, Michelandrea De Cesare, Domenico Delia, Carmelo Drago, Giacomo Manenti, Leonardo Manzoni, Mario Milani, Elisabetta Moroni, Paola Perego, Donatella Potenza, Vincenzo Rizzo, Cinzia Scavullo, Carlo Scolastico, Federica Servida, Francesca Vasile, Pierfausto Seneci
JournalBioorganic & medicinal chemistry (Bioorg Med Chem) Vol. 20 Issue 22 Pg. 6709-23 (Nov 15 2012) ISSN: 1464-3391 [Electronic] England
PMID23062821 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
CopyrightCopyright © 2012 Elsevier Ltd. All rights reserved.
Chemical References
  • Inhibitor of Apoptosis Proteins
  • Oligopeptides
  • SMAC peptide
Topics
  • Animals
  • Binding Sites
  • Biomimetic Materials (chemistry, therapeutic use, toxicity)
  • Cell Line, Tumor
  • Cell Survival (drug effects)
  • Crystallography, X-Ray
  • Dimerization
  • Female
  • HL-60 Cells
  • Half-Life
  • Humans
  • Inhibitor of Apoptosis Proteins (antagonists & inhibitors, metabolism)
  • Mice
  • Mice, Nude
  • Molecular Dynamics Simulation
  • Nuclear Magnetic Resonance, Biomolecular
  • Oligopeptides (chemistry)
  • Ovarian Neoplasms (drug therapy)
  • Protein Structure, Tertiary
  • Structure-Activity Relationship
  • Transplantation, Heterologous

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