Venn diagrams were generated using Venny 2.1 (https://bioinfogp.cnb.csic.es/tools/venny/).31 The STRING algorithm was used to predict interactive networks from RNA-seq data (https://string-db.org).32 Functional annotation analyses were performed by DAVID (https://david.ncifcrf.gov/home.jsp).33,34 In functional annotation analyses of commonly deregulated genes in GCT cells, only categories (UP_Keywords) with at least five members and p values ≤0.05 were considered significant. For functional annotation analysis of genes deregulated in each GCT cell line, only categories (UP_Keywords) with at least ten members and a p value ≤0.05 was considered significant. Only genes related to an official human gene symbol were included. ‘The Cancer Genome Atlas’ (TCGA) datasets were analysed for isoform/gene expression, DNA methylation and copy number alterations (CNAs) using the UCSC Xena browser (https://xena.ucsc.edu) and the cBioPortal (https://www.cbioportal.org).35–37
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