alexa Preexistence and clonal selection of MET amplification in EGFR mutant NSCLC.
Oncology

Oncology

Journal of Carcinogenesis & Mutagenesis

Author(s): Turke AB, Zejnullahu K, Wu YL, Song Y, DiasSantagata D,

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Abstract MET amplification activates ERBB3/PI3K/AKT signaling in EGFR mutant lung cancers and causes resistance to EGFR kinase inhibitors. We demonstrate that MET activation by its ligand, HGF, also induces drug resistance, but through GAB1 signaling. Using high-throughput FISH analyses in both cell lines and in patients with lung cancer, we identify subpopulations of cells with MET amplification prior to drug exposure. Surprisingly, HGF accelerates the development of MET amplification both in vitro and in vivo. EGFR kinase inhibitor resistance, due to either MET amplification or autocrine HGF production, was cured in vivo by combined EGFR and MET inhibition. These findings highlight the potential to prospectively identify treatment naive, patients with EGFR-mutant lung cancer who will benefit from initial combination therapy. Copyright (c) 2010 Elsevier Inc. All rights reserved.
This article was published in Cancer Cell and referenced in Journal of Carcinogenesis & Mutagenesis

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