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- W2564109898 abstract "The identification of predefined groups of genes (gene-sets) which are differentially expressed between two conditions (gene-set analysis, or GSA) is a very popular analysis in bioinformatics. GSA incorporates biological knowledge by aggregating over genes that are believed to be functionally related. This can enhance statistical power over analyses that consider only one gene at a time. However, currently available GSA approaches are all based on univariate two-sample comparison of single genes. This means that they cannot test for differences in covariance structure between the two conditions. Yet interplay between genes is a central aspect of biological investigation and it is likely that such interplay may differ between conditions. This paper proposes a novel approach for gene-set analysis that allows for truly multivariate hypotheses, in particular differences in gene-gene networks between conditions. Testing hypotheses concerning networks is challenging due the nature of the underlying estimation problem. Our starting point is a recent, general approach for high-dimensional two-sample testing. We refine the approach and show how it can be used to perform multivariate, network-based gene-set testing. We validate the approach in simulated examples and show results using high-throughput data from several studies in cancer biology." @default.
- W2564109898 created "2017-01-06" @default.
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- W2564109898 date "2013-08-13" @default.
- W2564109898 modified "2023-09-27" @default.
- W2564109898 title "Network-based multivariate gene-set testing" @default.
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