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• W3160796015 abstract "Genes often work together to perform complex biological processes, and networks provide a versatile framework for representing the interactions between multiple genes. Differential network analysis (DiNA) quantifies how this network structure differs between two or more groups/phenotypes (e.g., disease subjects and healthy controls), with the goal of determining whether differences in network structure can help explain differences between phenotypes. In this paper, we focus on gene co-expression networks, although in principle, the methods studied can be used for DiNA for other types of features (e.g., metabolome, epigenome, microbiome, proteome, etc.). Three common applications of DiNA involve (1) testing whether the connections to a single gene differ between groups, (2) testing whether the connection between a pair of genes differs between groups, or (3) testing whether the connections within a module (a subset of 3 or more genes) differs between groups. This article focuses on the latter, as there is a lack of studies comparing statistical methods for identifying differentially co-expressed modules (DCMs). Through extensive simulations, we compare several previously proposed test statistics and a new p-norm difference test (PND). We demonstrate that the true positive rate of the proposed PND test is competitive with and often higher than the other methods, while controlling the false positive rate. The R package discoMod (differentially co-expressed modules) implements the proposed method and provides a full pipeline for identifying DCMs: clustering tools to derive gene modules, tests to identify DCMs, and methods for visualizing the results." @default.
• W3160796015 created "2021-05-24" @default.
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• W3160796015 date "2021-05-19" @default.
• W3160796015 modified "2023-10-06" @default.
• W3160796015 title "Comparing Statistical Tests for Differential Network Analysis of Gene Modules" @default.
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• W3160796015 doi "https://doi.org/10.3389/fgene.2021.630215" @default.
• W3160796015 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/8170128" @default.
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