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Integrating molecular QTL data into genome-wide genetic association analysis: Probabilistic assessment of enrichment and colocalization

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Wen, Xiaoquan, Pique-Regi, Roger, Luca, Francesca·2017·PLOS Genetics

Abstract

We propose a novel statistical framework for integrating the result from molecular quantitative trait loci (QTL) mapping into genome-wide genetic association analysis of complex traits, with the primary objectives of quantitatively assessing the enrichment of the molecular QTLs in complex trait-associated genetic variants and the colocalizations of the two types of association signals. We introduce a natural Bayesian hierarchical model that treats the latent association status of molecular QTLs as SNP-level annotations for candidate SNPs of complex traits. We detail a computational procedure to seamlessly perform enrichment, fine-mapping and colocalization analyses, which is a distinct feature compared to the existing colocalization analysis procedures in the literature. The proposed approach is computationally efficient and requires only summary-level statistics. We evaluate and demonstrate the proposed computational approach through extensive simulation studies and analyses of blood lipid data and the whole blood eQTL data from the GTEx project. In addition, a useful utility from our proposed method enables the computation of expected colocalization signals using simple characteristics of the association data. Using this utility, we further illustrate the importance of enrichment analysis on the ability to discover colocalized signals and the potential limitations of currently available molecular QTL data. The software pipeline that implements the proposed computation procedures, enloc, is freely available at https://github.com/xqwen/integrative.

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Metadata

Authors
Wen, X., Pique-Regi, R., & Luca, F.
Venue
PLOS Genetics
Published
2017-03-09
Volume
13
Issue
3
Pages
e1006646
ISSN
  • 1553-7390 (ISSN-L)
  • 1553-7404
OpenAlex
W2952273935
Cited by
264
References
41
FWCI
11.78
Type
journal article
Language
en
Open access
gold

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CoChat. (2026). Citation check: Integrating molecular QTL data into genome-wide genetic association analysis: Probabilistic assessment of enrichment and colocalization. https://app.cochat.ai/papers/10.1371/journal.pgen.1006646
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Wen, X., Pique-Regi, R., & Luca, F. (2017). Integrating molecular QTL data into genome-wide genetic association analysis: Probabilistic assessment of enrichment and colocalization. PLOS Genetics. https://doi.org/10.1371/journal.pgen.1006646

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