Further exploration of DVD-445 as a lead thioredoxin reductase (TrxR) inhibitor for cancer therapy: Optimization of potency and evaluation of anticancer potential

Eur J Med Chem. 2020 Apr 1:191:112119. doi: 10.1016/j.ejmech.2020.112119. Epub 2020 Feb 6.

Abstract

A series of analogs of the earlier reported lead compound DVD-445 (thioredoxin reductase inhibitor with anticancer activity) has been synthesized via a modified Ugi reaction and investigated. Seven most potent compounds (with IC50 below 5.00 μM against recombinant rTrxR1 enzyme) were examined for their effect on cell growth and viability, oxidative stress induction and P-glycoprotein (P-gp) inhibition in human glioblastoma cells cell line U87 and its corresponding multidrug resistant (MDR) cell line U87-TxR. Several of these frontrunner compounds were shown to be superior over DVD-445. Besides providing promising candidates for anticancer therapy, our study further validates the small electrophilic Ugi Michael acceptor (UMA) chemotype as efficacious inhibitor of thioredoxin reductase.

Keywords: Cancer cell defense mechanism; Covalent inhibitor; Michael acceptors; Oxidative stress; P-gp inhibition; Thioredoxin reductase; Ugi four-component reaction.

MeSH terms

  • ATP Binding Cassette Transporter, Subfamily B, Member 1 / antagonists & inhibitors
  • Antineoplastic Agents / chemical synthesis
  • Antineoplastic Agents / chemistry
  • Antineoplastic Agents / pharmacology*
  • Cell Proliferation / drug effects
  • Cell Survival / drug effects
  • Cells, Cultured
  • Dose-Response Relationship, Drug
  • Drug Screening Assays, Antitumor
  • Enzyme Inhibitors / chemical synthesis
  • Enzyme Inhibitors / chemistry
  • Enzyme Inhibitors / pharmacology*
  • Humans
  • Molecular Structure
  • Oxidative Stress / drug effects
  • Recombinant Proteins / metabolism
  • Structure-Activity Relationship
  • Thioredoxin Reductase 1 / antagonists & inhibitors*
  • Thioredoxin Reductase 1 / metabolism

Substances

  • ATP Binding Cassette Transporter, Subfamily B, Member 1
  • Antineoplastic Agents
  • Enzyme Inhibitors
  • Recombinant Proteins
  • TXNRD1 protein, human
  • Thioredoxin Reductase 1