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Development and validation of a prognostic gene-expression signature for lung adenocarcinoma

Authors
 Yun-Yong Park ., Eun Sung Park , ., Sang Bae Kim , , Sang Cheol Kim , Bo Hwa Sohn , In-Sun Chu , Woojin Jeong , , Gordon B. Mills , Lauren Averett Byers , Ju-Seog Lee * 
Citation
 PLoS One, Vol.7(9) : e44225, 2012 
Journal Title
 PLoS One 
ISSN
 1932-6203 
Issue Date
2012
Abstract
Although several prognostic signatures have been developed in lung cancer, their application in clinical practice has been limited because they have not been validated in multiple independent data sets. Moreover, the lack of common genes between the signatures makes it difficult to know what biological process may be reflected or measured by the signature. By using classical data exploration approach with gene expression data from patients with lung adenocarcinoma (n = 186), we uncovered two distinct subgroups of lung adenocarcinoma and identified prognostic 193-gene gene expression signature associated with two subgroups. The signature was validated in 4 independent lung adenocarcinoma cohorts, including 556 patients. In multivariate analysis, the signature was an independent predictor of overall survival (hazard ratio, 2.4; 95% confidence interval, 1.2 to 4.8; p = 0.01). An integrated analysis of the signature revealed that E2F1 plays key roles in regulating genes in the signature. Subset analysis demonstrated that the gene signature could identify high-risk patients in early stage (stage I disease), and patients who would have benefit of adjuvant chemotherapy. Thus, our study provided evidence for molecular basis of clinically relevant two distinct two subtypes of lung adenocarcinoma.
URI
http://ir.ymlib.yonsei.ac.kr/handle/22282913/91720
DOI
10.1371/journal.pone.0044225
Appears in Collections:
1. 연구논문 > 5. Research Institutes > Institute for Medical Convergence
Yonsei Authors
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