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Deprecated: Implicit conversion from float 229.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 BioData+Min 2017 ; 10 (ä): ä Nephropedia Template TP
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Gene Set Enrichment Analyses: lessons learned from the heart failure phenotype #MMPMID28559929
Tragante V; Gho JMIH; Felix JF; Vasan RS; Smith NL; Voight BF; Palmer C; van der Harst P; Moore JH; Asselbergs FW
BioData Min 2017[]; 10 (ä): ä PMID28559929show ga
Background: Genetic studies for complex diseases have predominantly discovered main effects at individual loci, but have not focused on genomic and environmental contexts important for a phenotype. Gene Set Enrichment Analysis (GSEA) aims to address this by identifying sets of genes or biological pathways contributing to a phenotype, through gene-gene interactions or other mechanisms, which are not the focus of conventional association methods. Results: Approaches that utilize GSEA can now take input from array chips, either gene-centric or genome-wide, but are highly sensitive to study design, SNP selection and pruning strategies, SNP-to-gene mapping, and pathway definitions. Here, we present lessons learned from our experience with GSEA of heart failure, a particularly challenging phenotype due to its underlying heterogeneous etiology. Conclusions: This case study shows that proper data handling is essential to avoid false-positive results. Well-defined pipelines for quality control are needed to avoid reporting spurious results using GSEA. Electronic supplementary material: The online version of this article (doi:10.1186/s13040-017-0137-5) contains supplementary material, which is available to authorized users.