Notch3-dependent β-catenin signaling mediates EGFR TKI drug persistence in EGFR mutant NSCLC

Nat Commun. 2018 Aug 10;9(1):3198. doi: 10.1038/s41467-018-05626-2.

Abstract

EGFR tyrosine kinase inhibitors cause dramatic responses in EGFR-mutant lung cancer, but resistance universally develops. The involvement of β-catenin in EGFR TKI resistance has been previously reported, however, the precise mechanism by which β-catenin activation contributes to EGFR TKI resistance is not clear. Here, we show that EGFR inhibition results in the activation of β-catenin signaling in a Notch3-dependent manner, which facilitates the survival of a subset of cells that we call "adaptive persisters". We previously reported that EGFR-TKI treatment rapidly activates Notch3, and here we describe the physical association of Notch3 with β-catenin, leading to increased stability and activation of β-catenin. We demonstrate that the combination of EGFR-TKI and a β-catenin inhibitor inhibits the development of these adaptive persisters, decreases tumor burden, improves recurrence free survival, and overall survival in xenograft models. These results supports combined EGFR-TKI and β-catenin inhibition in patients with EGFR mutant lung cancer.

Publication types

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

MeSH terms

  • Animals
  • Carcinoma, Non-Small-Cell Lung / blood
  • Carcinoma, Non-Small-Cell Lung / genetics*
  • Carcinoma, Non-Small-Cell Lung / pathology
  • Cell Line, Tumor
  • DNA-Binding Proteins / metabolism
  • Drug Resistance, Neoplasm / drug effects
  • Epithelial-Mesenchymal Transition / drug effects
  • ErbB Receptors / genetics
  • Humans
  • Lung Neoplasms / blood
  • Lung Neoplasms / genetics*
  • Lung Neoplasms / pathology
  • Mice, Inbred NOD
  • Mice, SCID
  • Mutation / genetics*
  • Neoplastic Stem Cells / drug effects
  • Neoplastic Stem Cells / metabolism
  • Neoplastic Stem Cells / pathology
  • Phenotype
  • Plasminogen Activator Inhibitor 1 / blood
  • Protein Kinase Inhibitors / pharmacology*
  • Protein Stability / drug effects
  • Receptor, Notch3 / metabolism*
  • Signal Transduction*
  • Transcription Factors / metabolism
  • beta Catenin / antagonists & inhibitors
  • beta Catenin / metabolism*

Substances

  • DNA-Binding Proteins
  • MAML1 protein, human
  • NOTCH3 protein, human
  • Plasminogen Activator Inhibitor 1
  • Protein Kinase Inhibitors
  • Receptor, Notch3
  • Transcription Factors
  • beta Catenin
  • EGFR protein, human
  • ErbB Receptors