| Literature DB >> 17463250 |
Jeffrey A Engelman1, Kreshnik Zejnullahu, Tetsuya Mitsudomi, Youngchul Song, Courtney Hyland, Joon Oh Park, Neal Lindeman, Christopher-Michael Gale, Xiaojun Zhao, James Christensen, Takayuki Kosaka, Alison J Holmes, Andrew M Rogers, Federico Cappuzzo, Tony Mok, Charles Lee, Bruce E Johnson, Lewis C Cantley, Pasi A Jänne.
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.Entities:
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Year: 2007 PMID： 17463250 DOI： 10.1126/science.1141478
Source DB: PubMed Journal: Science ISSN： 0036-8075 Impact factor: 47.728