A genetic cell context-dependent role for ZEB1 in lung cancer

Nat Commun. 2016 Jul 26:7:12231. doi: 10.1038/ncomms12231.

Abstract

The Zinc-finger E-box-binding Homeobox-1 (ZEB1) is a transcription factor that promotes epithelial-mesenchymal transition (EMT) and acts as an oncogene in KRAS-mutated lung cancer models. Here we report that ZEB1 exerts the opposite effect in EGFR-mutated lung cancer cells, where it suppresses growth by increasing microRNA-200 targets to antagonize ERBB3, a driver of mutant EGFR-dependent cell growth. Among these targets, NOTCH1 represses ERBB3 promoter activity and the expression of ERBB3. Furthermore, we find that EGFR inhibitor treatment, which inhibits the growth of EGFR-mutated cells, induces ZEB1. Despite its growth-inhibiting effect, EGFR inhibitor-induced ZEB1 strongly promotes EMT-dependent resistance to EGFR inhibitors partially through NOTCH1, suggesting a multifunctional role for NOTCH1 in EGFR-mutated cells. These results support a previously unrecognized genetic cell context-dependent role for ZEB1 and suggest that NOTCH1 may be a useful target for treating resistance to EGFR inhibitors, especially EMT-driven resistance.

Publication types

  • Research Support, N.I.H., Extramural

MeSH terms

  • Adenocarcinoma / genetics
  • Adenocarcinoma / pathology
  • Adenocarcinoma of Lung
  • Animals
  • Cell Line, Tumor
  • Cell Proliferation / drug effects
  • Drug Resistance, Neoplasm / drug effects
  • Drug Resistance, Neoplasm / genetics
  • Epithelial-Mesenchymal Transition / drug effects
  • Epithelial-Mesenchymal Transition / genetics
  • ErbB Receptors / metabolism
  • Gefitinib
  • Gene Expression Regulation, Neoplastic / drug effects
  • Humans
  • Lung / metabolism
  • Lung / pathology
  • Lung Neoplasms / genetics*
  • Lung Neoplasms / pathology*
  • Male
  • Mice, Nude
  • MicroRNAs / genetics
  • MicroRNAs / metabolism
  • Promoter Regions, Genetic / genetics
  • Proto-Oncogene Proteins p21(ras) / metabolism
  • Quinazolines / pharmacology
  • Quinazolines / therapeutic use
  • Receptor, ErbB-3 / genetics
  • Receptor, ErbB-3 / metabolism
  • Receptor, Notch1 / metabolism
  • Reproducibility of Results
  • Smoking / adverse effects
  • Xenograft Model Antitumor Assays
  • Zinc Finger E-box-Binding Homeobox 1 / metabolism*

Substances

  • KRAS protein, human
  • MIRN200 microRNA, human
  • MicroRNAs
  • Quinazolines
  • Receptor, Notch1
  • ZEB1 protein, human
  • Zinc Finger E-box-Binding Homeobox 1
  • ERBB3 protein, human
  • ErbB Receptors
  • Receptor, ErbB-3
  • Proto-Oncogene Proteins p21(ras)
  • Gefitinib