Synthesis and antiproliferative activities against Hep-G2 of salicylanide derivatives: potent inhibitors of the epidermal growth factor receptor (EGFR) tyrosine kinase

J Enzyme Inhib Med Chem. 2011 Feb;26(1):37-45. doi: 10.3109/14756361003671060. Epub 2010 Jun 28.

Abstract

A series of salicylanilide derivatives (compounds 1-32) were synthesised by reacting substituted salicylic acids and anilines. The chemical structures of these compounds were determined by (1)H-NMR, electrospray ionisation mass spectrometry (ESI-MS) and elemental analysis. The compounds were assayed for their antiproliferative activities against the Hep-G2 cell line by the 3-(4,5-dimethylthylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) method. Among the compounds tested, 22 and 28 showed the most favouable antiproliferative activities with 50% inhibitory concentration (IC(50)) values of 1.7 and 1.3 μM, respectively, which were comparable to the positive control of 5-fluorouracil (IC(50)=1.8 μM). A solid-phase ELISA assay was also performed to evaluate the ability of compounds 1-32 to inhibit the autophosphorylation of the epidermal growth factor receptor tyrosine kinase (EGFR TK). Docking simulations of 22 and 28 were carried out to illustrate the binding mode of the molecule into the EGFR active site, and the result suggested that both compounds 22 and 28 could bind the EGFR kinase well.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aniline Compounds / chemistry
  • Antineoplastic Agents / chemical synthesis
  • Antineoplastic Agents / metabolism
  • Antineoplastic Agents / pharmacology*
  • ErbB Receptors / antagonists & inhibitors*
  • Fluorouracil / pharmacology
  • Hep G2 Cells
  • Humans
  • Inhibitory Concentration 50
  • Molecular Dynamics Simulation
  • Nuclear Magnetic Resonance, Biomolecular
  • Phosphorylation
  • Protein Binding
  • Salicylanilides / chemical synthesis
  • Salicylanilides / metabolism
  • Salicylanilides / pharmacology*
  • Salicylates / chemistry
  • Structure-Activity Relationship
  • Tetrazolium Salts / analysis
  • Thiazoles / analysis

Substances

  • Aniline Compounds
  • Antineoplastic Agents
  • Salicylanilides
  • Salicylates
  • Tetrazolium Salts
  • Thiazoles
  • ErbB Receptors
  • thiazolyl blue
  • aniline
  • Fluorouracil