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rowid title DOI URL created subject references-count is-referenced-by-count ISSN container-title abstract author_number orcids names award_numbers funder_names funder_dois
22 ["EGFR gene copy number as a predictive/biomarker for patients with non-small-cell lung cancer receiving tyrosine kinase inhibitor treatment: a systematic review and meta-analysis"] 10.1136/jim-2016-000252 2016-09-24T02:48:22Z [] 41 6 ["1081-5589", "1708-8267"] Journal of Investigative Medicine <jats:p>Epidermal growth factor receptor (<jats:italic>EGFR</jats:italic>) gene copy number has been proposed as a candidate biomarker for predicting treatment response to EGFR tyrosine kinase inhibitors (EGFR-TKIs) in patients with advanced non-small-cell lung cancer (NSCLC). MEDLINE, PubMed, Cochrane, and Google Scholar databases were searched until October 21, 2015 using the following search terms: lung neoplasms/lung cancer/non-small cell lung cancer/NSCLC, EGFR, gene amplification, copy number, erlotinib, gefitinib, tyrosine-kinase inhibitor/TKI, predictor. 17 studies were included in the analysis with a total of 2047 patients. The overall analysis found that increased <jats:italic>EGFR</jats:italic> gene copy number was associated with higher overall response rate (ORR), overall survival (OS) and progression-free survival (PFS; p values ≤0.008) compared with patients without a high <jats:italic>EGFR</jats:italic> gene copy number. Subgroup analysis found that in a population of patients who were primarily Caucasian, a higher <jats:italic>EGFR</jats:italic> gene copy number was also associated with increased ORR, OS, and PFS (p values ≤0.018). The results were similar in a population of Asian patients, except that a higher <jats:italic>EGFR</jats:italic> gene copy number was not associated with improved OS (p=0.248). Sensitivity analysis indicated that no one study overly influenced the results and that the findings are robust. The result of the analysis found that <jats:italic>EGFR</jats:italic> gene copy number was associated with increased OS and PFS, supporting the idea that <jats:italic>EGFR</jats:italic> gene copy number is a biomarker for response to EGFR-TKI therapy in patients with advanced NSCLC.</jats:p> 4 [] ["Xin Zhang", "Yiwen Zhang", "Hailing Tang", "Jianxing He"] [""] [""] [""]