Synthesis of α,β-Unsaturated Carbonyl-Based Compounds, Oxime and Oxime Ether Analogs as Potential Anticancer Agents for Overcoming Cancer Multidrug Resistance by Modulation of Efflux Pumps in Tumor Cells

J Med Chem. 2016 Apr 14;59(7):3549-61. doi: 10.1021/acs.jmedchem.6b00276. Epub 2016 Apr 4.

Abstract

Sixty-nine novel α,β-unsaturated carbonyl based compounds, including cyclohexanone, tetralone, oxime, and oxime ether analogs, were synthesized. The antiproliferative activity determined by using seven different human cancer cell lines provided a structure-activity relationship. Compound 8ag exhibited high antiproliferative activity against Panc-1, PaCa-2, A-549, and PC-3 cell lines, with IC50 value of 0.02 μM, comparable to the positive control Erlotinib. The ten most active antiproliferative compounds were assessed for mechanistic effects on BRAF(V600E), EGFR TK kinases, and tubulin polymerization, and were investigated in vitro to reverse efflux-mediated resistance developed by cancer cells. Compound 8af exhibited the most potent BRAF(V600E) inhibitory activity with an IC50 value of 0.9 μM. Oxime analog 7o displayed the most potent EGFR TK inhibitory activity with an IC50 of 0.07 μM, which was analogous to the positive control. Some analogs including 7f, 8af, and 8ag showed a dual role as anticancer and MDR reversal agents.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Antineoplastic Agents / chemical synthesis*
  • Antineoplastic Agents / pharmacology*
  • Cell Proliferation / drug effects
  • Cyclohexanones / chemistry*
  • Drug Resistance, Multiple / drug effects*
  • ErbB Receptors / antagonists & inhibitors
  • Ethers / chemistry*
  • Humans
  • Models, Molecular
  • Mutation / genetics
  • Neoplasms / drug therapy*
  • Neoplasms / pathology
  • Oximes / chemical synthesis
  • Oximes / chemistry*
  • Oximes / pharmacology
  • Piperidones / chemical synthesis*
  • Piperidones / pharmacology*
  • Proto-Oncogene Proteins B-raf / antagonists & inhibitors
  • Proto-Oncogene Proteins B-raf / genetics
  • Structure-Activity Relationship
  • Tetralones / chemical synthesis*
  • Tetralones / pharmacology*
  • Tubulin / chemistry
  • Tubulin Modulators / chemical synthesis
  • Tubulin Modulators / pharmacology
  • Tumor Cells, Cultured

Substances

  • 2-(2-chloro-3,4-dimethoxybenzylidene)-8-nitrotetralone oxime
  • 3,5-bis(2-bromo-3,4,5-trimethoxybenzylidene)-1-methylpiperidin-4-one oxime
  • Antineoplastic Agents
  • Cyclohexanones
  • Ethers
  • Oximes
  • Piperidones
  • Tetralones
  • Tubulin
  • Tubulin Modulators
  • cyclohexanone
  • EGFR protein, human
  • ErbB Receptors
  • BRAF protein, human
  • Proto-Oncogene Proteins B-raf