MET amplification leads to gefitinib resistance in lung cancer by activating ERBB3 signaling Academic Article uri icon


MeSH Major

  • Carcinoma, Non-Small-Cell Lung
  • Gene Amplification
  • Proto-Oncogene Proteins
  • Quinazolines
  • Receptor, ErbB-3
  • Receptors, Growth Factor
  • Signal Transduction


  • The epidermal growth factor receptor (EGFR) kinase inhibitors gefitinib and erlotinib are effective treatments for lung cancers with EGFR activating mutations, but these tumors invariably develop drug resistance. Here, we describe a gefitinib-sensitive lung cancer cell line that developed resistance to gefitinib as a result of focal amplification of the MET proto-oncogene. inhibition of MET signaling in these cells restored their sensitivity to gefitinib. MET amplification was detected in 4 of 18 (22%) lung cancer specimens that had developed resistance to gefitinib or erlotinib. We find that amplification of MET causes gefitinib resistance by driving ERBB3 (HER3)-dependent activation of PI3K, a pathway thought to be specific to EGFR/ERBB family receptors. Thus, we propose that MET amplification may promote drug resistance in other ERBB-driven cancers as well.

publication date

  • May 18, 2007



  • Academic Article



  • eng

Digital Object Identifier (DOI)

  • 10.1126/science.1141478

PubMed ID

  • 17463250

Additional Document Info

start page

  • 1039

end page

  • 43


  • 316


  • 5827