Exploration of novel macrocyclic dipeptide N-benzyl amides as proteasome inhibitors

Eur J Med Chem. 2019 Feb 15:164:423-439. doi: 10.1016/j.ejmech.2018.12.072. Epub 2018 Dec 31.

Abstract

As proteasome inhibitors, a series of novel macrocyclic dipeptide N-benzyl amides were designed, synthesized and evaluated. Most of them exhibited potent proteasome inhibition and excellent anti-proliferative activity against RPMI 8226, MM1S, and MV-4-11 cell lines. As the most distinguished one among this series, compound 23h displayed potent and selective proteasome inhibitory potency (IC50: β5c = 29 nM, β5i = 35 nM, β1c, β2c,β1i,β2i > 10 μM), excellent anti-proliferative activity against RPMI 8226, MM1S, and MV-4-11 cell lines with IC50 values of 18 nM, 15 nM, and 21 nM, respectively, as well as favorable metabolic stability in human liver microsomes (HLMs), highlighting that it is a promising lead compound for further development of proteasome inhibitors.

Keywords: Macrocyclic dipeptides; Metabolic stability; N-Benzyl amides; Proteasome inhibitors.

MeSH terms

  • Amides
  • Cell Line
  • Cell Proliferation / drug effects
  • Dipeptides
  • Drug Design*
  • Humans
  • Inhibitory Concentration 50
  • Macrocyclic Compounds / chemistry
  • Macrocyclic Compounds / pharmacology*
  • Microsomes, Liver / metabolism
  • Proteasome Inhibitors / chemistry*

Substances

  • Amides
  • Dipeptides
  • Macrocyclic Compounds
  • Proteasome Inhibitors