Synthesis, Characterization, and in Vitro Antitumor Activity of Ruthenium(II) Polypyridyl Complexes Tethering EGFR-Inhibiting 4-Anilinoquinazolines

Inorg Chem. 2016 May 2;55(9):4595-605. doi: 10.1021/acs.inorgchem.6b00309. Epub 2016 Apr 19.

Abstract

Ruthenium-based anticancer complexes are promising antitumor agents for their low system toxicity and versatile chemical structures. Epidermal growth factor receptor (EGFR) has been found to be overexpressed in a broad range of tumor cells and is regarded as a drug target in developing novel antitumor drugs. In this work, five ruthenium(II) polypyridyl complexes containing EGFR-inhibiting 4-anilinoquinazoline pharmacophores were synthesized and characterized. These complexes showed both high EGFR-inhibiting activity and strong DNA minor groove-binding activity. In vitro antiproliferation screening demonstrated that the prepared ruthenium complexes are highly cytotoxic against a series of cancer cell lines, in particular non-small-cell lung A549 and human epidermoid carcinoma A431. Fluorescence-activated cell sorting analysis and fluorescence microscopy revealed that the most active complex, K4, induced much more late-stage cell apoptosis and necrosis than gefitinib, the first EGFR-targeting antitumor drug in clinical use. These results indicate that the ruthenium(II) polypyridyl complexes bearing EGFR-inhibiting 4-anilinoquinazolines possess highly active dual-targeting anticancer activity and are promising in developing new anticancer agents.

MeSH terms

  • 2,2'-Dipyridyl / chemical synthesis
  • 2,2'-Dipyridyl / chemistry
  • 2,2'-Dipyridyl / pharmacology*
  • Aniline Compounds / chemical synthesis
  • Aniline Compounds / chemistry
  • Aniline Compounds / pharmacology*
  • Antineoplastic Agents / chemical synthesis
  • Antineoplastic Agents / chemistry
  • Antineoplastic Agents / pharmacology*
  • Apoptosis / drug effects
  • Benzimidazoles / chemistry
  • Cell Line, Tumor
  • Cisplatin / pharmacology
  • Coordination Complexes / chemical synthesis
  • Coordination Complexes / chemistry
  • Coordination Complexes / pharmacology*
  • DNA / metabolism
  • ErbB Receptors / antagonists & inhibitors*
  • Fluorescent Dyes / chemistry
  • Gefitinib
  • Humans
  • Hydrolysis
  • Ligands
  • Membrane Proteins / metabolism
  • Phenanthrolines / chemical synthesis
  • Phenanthrolines / chemistry
  • Phenanthrolines / pharmacology
  • Quinazolines / chemical synthesis
  • Quinazolines / chemistry
  • Quinazolines / pharmacology*
  • Ruthenium / chemistry*

Substances

  • Aniline Compounds
  • Antineoplastic Agents
  • Benzimidazoles
  • Coordination Complexes
  • Fluorescent Dyes
  • Ligands
  • Membrane Proteins
  • Phenanthrolines
  • Quinazolines
  • 2,2'-Dipyridyl
  • Ruthenium
  • DNA
  • ErbB Receptors
  • bisbenzimide ethoxide trihydrochloride
  • Cisplatin
  • Gefitinib