Abstract
Identification of differentially expressed (DE) genes under different experimental conditions is an important task in many microarray-based studies. There are many methods developed to detect DE genes based on either fold-change (FC) strategy or statistical test. However, majority of those methods identify DE genes by calculating the expression values of individual genes, without taking interactions between genes into consideration. In this study, we consider the interaction and importance of genes in the network and believe that the edges in the network also contribute a lot to DE genes. Therefore, we propose three new ideas for calculating the expression values of edges by considering mean expression, minimal expression and partial expression, respectively. Those methods were implemented and evaluated on the microarray data and were compared with existing methods. The results show that the proposed edge-based methods can identify more biologically relevant genes and have high computational efficiency. More importantly, the Min-Edge method outperforms the other methods when feasibility and specificity are considered simultaneously.
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Acknowledgement
This work was supported by the National Natural Science Foundation of China under [Grant No. 61602386, 61772426 and 61332014]; the Natural Science Foundation of Shaanxi Province under [Grant No. 2017JQ6008]; the Fundamental Research Funds for the Central Universities, and the Top International University Visiting Program for Outstanding Young scholars of Northwestern Polytechnical University.
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Chen, B., Gao, L., Shang, X. (2019). Identifying Differentially Expressed Genes Based on Differentially Expressed Edges. In: Huang, DS., Jo, KH., Huang, ZK. (eds) Intelligent Computing Theories and Application. ICIC 2019. Lecture Notes in Computer Science(), vol 11644. Springer, Cham. https://doi.org/10.1007/978-3-030-26969-2_10
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DOI: https://doi.org/10.1007/978-3-030-26969-2_10
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