alexa Robust meta-analysis of gene expression using the elastic net.
Biomedical Sciences

Biomedical Sciences

International Journal of Biomedical Data Mining

Author(s): Hughey JJ, Butte AJ

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Abstract Meta-analysis of gene expression has enabled numerous insights into biological systems, but current methods have several limitations. We developed a method to perform a meta-analysis using the elastic net, a powerful and versatile approach for classification and regression. To demonstrate the utility of our method, we conducted a meta-analysis of lung cancer gene expression based on publicly available data. Using 629 samples from five data sets, we trained a multinomial classifier to distinguish between four lung cancer subtypes. Our meta-analysis-derived classifier included 58 genes and achieved 91\% accuracy on leave-one-study-out cross-validation and on three independent data sets. Our method makes meta-analysis of gene expression more systematic and expands the range of questions that a meta-analysis can be used to address. As the amount of publicly available gene expression data continues to grow, our method will be an effective tool to help distill these data into knowledge. © The Author(s) 2015. Published by Oxford University Press on behalf of Nucleic Acids Research.
This article was published in Nucleic Acids Res and referenced in International Journal of Biomedical Data Mining

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