Journal
NATURE GENETICS
Volume 55, Issue 3, Pages 389-+Publisher
NATURE PORTFOLIO
DOI: 10.1038/s41588-023-01327-9
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Interacting proteins with similar functions influence organismal traits. Network-based expansion of trait-associated genes for 1,002 human traits recovers known disease genes or drug targets, identifies groups of traits with shared genetic and biological processes, and uncovers pleiotropic gene modules associated with multiple traits. This study demonstrates potential opportunities for drug repurposing and development.
Interacting proteins tend to have similar functions, influencing the same organismal traits. Interaction networks can be used to expand the list of candidate trait-associated genes from genome-wide association studies. Here, we performed network-based expansion of trait-associated genes for 1,002 human traits showing that this recovers known disease genes or drug targets. The similarity of network expansion scores identifies groups of traits likely to share an underlying genetic and biological process. We identified 73 pleiotropic gene modules linked to multiple traits, enriched in genes involved in processes such as protein ubiquitination and RNA processing. In contrast to gene deletion studies, pleiotropy as defined here captures specifically multicellular-related processes. We show examples of modules linked to human diseases enriched in genes with known pathogenic variants that can be used to map targets of approved drugs for repurposing. Finally, we illustrate the use of network expansion scores to study genes at inflammatory bowel disease genome-wide association study loci, and implicate inflammatory bowel disease-relevant genes with strong functional and genetic support. Network expansion of trait-associated genes for 1,002 human phenotypes identifies pleiotropic gene modules and biological processes associated with multiple traits, and potential opportunities for drug repurposing and development.
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