Discovery of hydrazide-containing oseltamivir analogues as potent inhibitors of influenza A neuraminidase

Eur J Med Chem. 2021 Oct 5:221:113567. doi: 10.1016/j.ejmech.2021.113567. Epub 2021 May 23.

Abstract

Neuraminidase (NA) inhibitors play a prime role in treating influenza. However, a variety of viruses containing mutant NAs have developed severe drug resistance towards NA inhibitors, so it is of crucial significance to solve this problem. Encouraged by urea-containing compound 12 disclosed by our lab, we designed a series of oseltamivir derivatives bearing hydrazide fragment for targeting the 150 cavity. Among the synthesized compounds, compound 17a showed 8.77-fold, 4.12-fold, 203-fold and 6.23-fold more potent activity than oseltamivir carboxylate against NAs from H5N1, H1N1, H5N1-H274Y, H1N1-H274Y, respectively. Meanwhile, the best compound 17a exhibited satisfactory metabolic stability in vitro. This study offers an important reference for the structural optimization of oseltamivir aiming at potent inhibition against H274Y mutant of NAs.

Keywords: 150 cavity; Hydrazide; Influenza A; Neuraminidase inhibitors; Oseltamivir analogues.

MeSH terms

  • Antiviral Agents / chemical synthesis
  • Antiviral Agents / chemistry
  • Antiviral Agents / pharmacology*
  • Dose-Response Relationship, Drug
  • Drug Discovery*
  • Enzyme Inhibitors / chemical synthesis
  • Enzyme Inhibitors / chemistry
  • Enzyme Inhibitors / pharmacology*
  • Humans
  • Hydrazines / chemical synthesis
  • Hydrazines / chemistry
  • Hydrazines / pharmacology*
  • Influenza A virus / drug effects*
  • Influenza A virus / enzymology
  • Microbial Sensitivity Tests
  • Molecular Structure
  • Mutation
  • Neuraminidase / antagonists & inhibitors*
  • Neuraminidase / genetics
  • Neuraminidase / metabolism
  • Oseltamivir / chemical synthesis
  • Oseltamivir / chemistry
  • Oseltamivir / pharmacology*
  • Structure-Activity Relationship
  • Viral Proteins / antagonists & inhibitors*
  • Viral Proteins / genetics
  • Viral Proteins / metabolism

Substances

  • Antiviral Agents
  • Enzyme Inhibitors
  • Hydrazines
  • Viral Proteins
  • Oseltamivir
  • NA protein, influenza A virus
  • Neuraminidase