MET Amplification Leads to Gefitinib Resistance in Lung Cancer by Activating ERBB3 Signaling

Author:

Engelman Jeffrey A.12345,Zejnullahu Kreshnik12345,Mitsudomi Tetsuya12345,Song Youngchul12345,Hyland Courtney12345,Park Joon Oh12345,Lindeman Neal12345,Gale Christopher-Michael12345,Zhao Xiaojun12345,Christensen James12345,Kosaka Takayuki12345,Holmes Alison J.12345,Rogers Andrew M.12345,Cappuzzo Federico12345,Mok Tony12345,Lee Charles12345,Johnson Bruce E.12345,Cantley Lewis C.12345,Jänne Pasi A.12345

Affiliation:

1. Massachusetts General Hospital Cancer Center, Boston, MA 02114, USA.

2. Department of Systems Biology, Harvard Medical School, Boston, MA 02115, USA.

3. Department of Signal Transduction, Beth Israel Deaconess Medical Center, Boston, MA 02115, USA.

4. Lowe Center for Thoracic Oncology, Dana-Farber Cancer Institute, Boston, MA 02115, USA.

5. Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA 02115, USA.

Abstract

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.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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