Background: Non-small cell lung cancer (NSCLC) is the predominant histological type of lung cancer, accounting for up to 85% of cases. Disease stage is commonly used to determine adjuvant treatment eligibility of NSCLC patients, however, it is an imprecise predictor of the prognosis of an individual patient. Currently, many researchers resort to microarray technology for identifying relevant genetic prognostic markers, with particular attention on trimming or extending a Cox regression model. Results: In this article, we propose a simple filter feature selection algorithm with a Cox regression model as the base. Applying this method to real-world microarray data identifies a histology-specific prognostic gene signature. Furthermore, the resulting 32-gene (32/12 for AC/SCC) prognostic signature for early-stage AC and SCC samples has superior predictive ability relative to two relevant prognostic signatures, and has comparable performance with signatures obtained by applying two state-of-the art algorithms separately to AC and SCC samples. Conclusions: Our proposal is conceptually simple, and straightforward to implement. Furthermore, it can be easily adapted and applied to a range of other research settings. Reviewers: This article was reviewed by Leonid Hanin (nominated by Dr. Lev Klebanov), Limsoon Wong and Jun Yu.
|State||Published - Apr 7 2015|
Bibliographical noteFunding Information:
This study was supported by the Natural Science Foundation of China (No 31401123); ST was also supported by a seed fund from Jilin University (No 450060491885). We thank Drs. Chang-Qi Zhu and Ming-Sound Tsao for assistance on GSE50081 data retrieval and Ms. Tianjiao Wang for data retrieval and glcoxph analysis. Especially, we thank Ms. Donna Gilbreath for scientific editing.
© Tian et al.; licensee BioMed Central.
- Adenocarcinoma (AC)
- Cox model
- Feature selection algorithm
- Gene expression barcode
- Histology-subtype specific
- Non-small cell lung cancer (NSCLC)
- Squamous cell carcinoma (SCC)
ASJC Scopus subject areas
- Ecology, Evolution, Behavior and Systematics
- Modeling and Simulation
- Biochemistry, Genetics and Molecular Biology (all)
- Agricultural and Biological Sciences (all)
- Applied Mathematics