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However, differential coexpression analyses of conceptually similar individual studies are often inconsistent and underpowered to provide definitive results. Researchers can greatly benefit from an open-source application facilitating the aggregation of evidence of differential coexpression across studies and the estimation of more robust common effects. We developed Meta Gene Set Coexpression Analysis (MetaGSCA), an analytical tool to systematically assess differential coexpression of an\n                    <jats:italic>a priori<\/jats:italic>\n                    defined gene set by aggregating evidence across studies to provide a definitive result. In the kernel, a nonparametric approach that accounts for the gene-gene correlation structure is used to test whether the gene set is differentially coexpressed between two comparative conditions, from which a permutation test\n                    <jats:italic>p<\/jats:italic>\n                    -statistic is computed for each individual study. A meta-analysis is then performed to combine individual study results with one of two options: a random-intercept logistic regression model or the inverse variance method. We demonstrated MetaGSCA in case studies investigating two human diseases and identified pathways highly relevant to each disease across studies. We further applied MetaGSCA in a pan-cancer analysis with hundreds of major cellular pathways in 11 cancer types. The results indicated that a majority of the pathways identified were dysregulated in the pan-cancer scenario, many of which have been previously reported in the cancer literature. Our analysis with randomly generated gene sets showed excellent specificity, indicating that the significant pathways\/gene sets identified by MetaGSCA are unlikely false positives. MetaGSCA is a user-friendly tool implemented in both forms of a Web-based application and an R package \u201cMetaGSCA\u201d. It enables comprehensive meta-analyses of gene set differential coexpression data, with an optional module of\n                    <jats:italic>post hoc<\/jats:italic>\n                    pathway crosstalk network analysis to identify and visualize pathways having similar coexpression profiles.\n                  <\/jats:p>","DOI":"10.1371\/journal.pcbi.1008976","type":"journal-article","created":{"date-parts":[[2021,5,5]],"date-time":"2021-05-05T12:10:53Z","timestamp":1620216653000},"page":"e1008976","update-policy":"https:\/\/doi.org\/10.1371\/journal.pcbi.corrections_policy","source":"Crossref","is-referenced-by-count":3,"title":["MetaGSCA: A tool for meta-analysis of gene set differential coexpression"],"prefix":"10.1371","volume":"17","author":[{"given":"Yan","family":"Guo","sequence":"first","affiliation":[]},{"given":"Hui","family":"Yu","sequence":"additional","affiliation":[]},{"given":"Haocan","family":"Song","sequence":"additional","affiliation":[]},{"given":"Jiapeng","family":"He","sequence":"additional","affiliation":[]},{"given":"Olufunmilola","family":"Oyebamiji","sequence":"additional","affiliation":[]},{"given":"Huining","family":"Kang","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9907-5819","authenticated-orcid":true,"given":"Jie","family":"Ping","sequence":"additional","affiliation":[]},{"given":"Scott","family":"Ness","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2086-9670","authenticated-orcid":true,"given":"Yu","family":"Shyr","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6472-5076","authenticated-orcid":true,"given":"Fei","family":"Ye","sequence":"additional","affiliation":[]}],"member":"340","published-online":{"date-parts":[[2021,5,4]]},"reference":[{"key":"pcbi.1008976.ref001","doi-asserted-by":"crossref","first-page":"565","DOI":"10.1038\/msb.2011.99","article-title":"Differential network biology","volume":"8","author":"T Ideker","year":"2012","journal-title":"Molecular systems biology"},{"issue":"7","key":"pcbi.1008976.ref002","doi-asserted-by":"crossref","first-page":"326","DOI":"10.1016\/j.tig.2010.05.001","article-title":"From \u2019differential expression\u2019 to \u2019differential networking\u2019\u2014identification of dysfunctional regulatory networks in diseases","volume":"26","author":"A. de la Fuente","year":"2010","journal-title":"Trends in genetics: TIG."},{"issue":"10","key":"pcbi.1008976.ref003","doi-asserted-by":"crossref","first-page":"615","DOI":"10.1038\/nrg.2016.87","article-title":"Network biology concepts in complex disease comorbidities","volume":"17","author":"JX Hu","year":"2016","journal-title":"Nature reviews Genetics"},{"key":"pcbi.1008976.ref004","doi-asserted-by":"crossref","DOI":"10.2202\/1544-6115.1128","article-title":"A general framework for weighted gene co-expression network analysis","volume":"4","author":"B Zhang","year":"2005","journal-title":"Statistical applications in genetics and molecular biology"},{"key":"pcbi.1008976.ref005","doi-asserted-by":"crossref","first-page":"559","DOI":"10.1186\/1471-2105-9-559","article-title":"WGCNA: an R package for weighted correlation network analysis","volume":"9","author":"P Langfelder","year":"2008","journal-title":"BMC bioinformatics"},{"key":"pcbi.1008976.ref006","doi-asserted-by":"crossref","first-page":"509","DOI":"10.1186\/1471-2105-7-509","article-title":"CoXpress: differential co-expression in gene expression data","volume":"7","author":"M. 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