Abstract:
:Transcriptome-wide association studies using predicted expression have identified thousands of genes whose locally regulated expression is associated with complex traits and diseases. In this work, we show that linkage disequilibrium induces significant gene-trait associations at non-causal genes as a function of the expression quantitative trait loci weights used in expression prediction. We introduce a probabilistic framework that models correlation among transcriptome-wide association study signals to assign a probability for every gene in the risk region to explain the observed association signal. Importantly, our approach remains accurate when expression data for causal genes are not available in the causal tissue by leveraging expression prediction from other tissues. Our approach yields credible sets of genes containing the causal gene at a nominal confidence level (for example, 90%) that can be used to prioritize genes for functional assays. We illustrate our approach by using an integrative analysis of lipid traits, where our approach prioritizes genes with strong evidence for causality.
journal_name
Nat Genetjournal_title
Nature geneticsauthors
Mancuso N,Freund MK,Johnson R,Shi H,Kichaev G,Gusev A,Pasaniuc Bdoi
10.1038/s41588-019-0367-1subject
Has Abstractpub_date
2019-04-01 00:00:00pages
675-682issue
4eissn
1061-4036issn
1546-1718pii
10.1038/s41588-019-0367-1journal_volume
51pub_type
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