Cited by 399Genetic Associations and EpidemiologySingle-cell and spatial transcriptomicsGenetic Mapping and Diversity in Plants and Animals

Single-cell RNA sequencing identifies celltype-specific cis-eQTLs and co-expression QTLs

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LifeLines Cohort Study, van der Wijst, Monique G. P., BIOS Consortium, Brugge, Harm, de Vries, Dylan H., Deelen, Patrick, Swertz, Morris A., Franke, Lude·2018·Nature Genetics

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Abstract

Genome-wide association studies have identified thousands of genetic variants that are associated with disease 1 . Most of these variants have small effect sizes, but their downstream expression effects, so-called expression quantitative trait loci (eQTLs), are often large 2 and celltype-specific 3-5. To identify these celltype-specific eQTLs using an unbiased approach, we used single-cell RNA sequencing to generate expression profiles of ~25,000 peripheral blood mononuclear cells from 45 donors. We identified previously reported cis-eQTLs, but also identified new celltype-specific cis-eQTLs. Finally, we generated personalized co-expression networks and identified genetic variants that significantly alter co-expression relationships (which we termed 'co-expression QTLs'). Single-cell eQTL analysis thus allows for the identification of genetic variants that impact regulatory networks.

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  • The eQTL framework has clear limitations, including reliance on naturally occurring human genetic variation, linkage disequilibrium, and restriction to cell types and tissues practically obtainable from large numbers of individuals.

    “On the other hand, the framework has clear limitations, including its reliance on naturally occurring human genetic variation (most enhancers do not harbour common variants that substantially perturb their activity), linkage disequilibrium [G] (multiple variants in a haplotype block may equivalently explain an association), and restriction to cell types and tissues that can be practically obtained”

    From Towards a comprehensive catalogue of validated and target-linked human enhancers (2020) · cites this paper as [138]

    The main text (page unavailable) reports near-perfect linkage disequilibrium between an eQTL SNP and a diabetes-associated SNP, supporting the cited point that linkage disequilibrium is relevant to interpreting associations. It does not state that multiple variants in a haplotype block may equivalently explain an association. The Online Methods describe analysis of common variants in donor blood cells, but do not establish the claim about most enhancers or a general restriction to practically obtainable tissues. (LLM, conf=0.76)

    Experimental — accuracy not yet measured
  • Earlier studies limited differential expression testing to predefined candidate genes or grouped genes into signatures.

    “differential gene expression testing was restricted to pre-defined candidate genes7,9,10 or genes were grouped into gene signatures3,4,6,8.”
  • In our own data set and published studies, doublet rates are slightly higher than shown in reference 77.

    “However, we observe in our own data set as well as in published studies47,78 slightly higher doublet rates than shown in77.”
  • The default doublet rate is based on 10X Genomics reference values and is a lower bound compared to doublet rates estimated for our own data and reported by other studies.

    “The default for the doublet rate is based on reference values from 10X Genomics and is a lower bound compared to the doublet rates we estimate for our own data and to rates reported by other studies47,78.”

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Authors
Study, L. C., van der Wijst, M. G. P., BIOS Consortium, Brugge, H., de Vries, D. H., Deelen, P., Swertz, M. A., & Franke, L.
Affiliations
University Medical Center Groningen (NL)
Corresponding author
Franke, Lude
Venue
Nature Genetics
Published
2018-04
Volume
50
Issue
4
Pages
493-497
ISSN
  • 1061-4036 (ISSN-L)
  • 1546-1718
OpenAlex
W2794458614
Cited by
399
References
38
Citations by year
2026: 32 · 2025: 52 · 2024: 61 · 2023: 52 · 2022: 48 · 2021: 68 · 2020: 46 · 2019: 27 · 2018: 11 · 2017: 1 · 2013: 1
FWCI
23.77
Type
journal article
Language
en
Open access
Locations
  • Nature Genetics (publishedVersion)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by-nc)
  • University of Groningen research database (University of Groningen / Centre for Information Technology) (publishedVersion, other-oa)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • University of Groningen research database (University of Groningen / Centre for Information Technology) (submittedVersion, other-oa)
Funders
  • ZonMw (184.021.007, 917.14.374)
  • Nederlandse Organisatie voor Wetenschappelijk Onderzoek (184021007, 917.164.455, 917.14.374, VIDI 917.164.455, 637640, NWO 184.021.007, ZonMW-VIDI 917.14.374)
  • Universitair Medisch Centrum Groningen
  • H2020 European Research Council (637640)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Associations and Epidemiology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Single-cell and spatial transcriptomics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Mapping and Diversity in Plants and Animals
Keywords
cis-eQTL, single-cell RNA sequencing, peripheral blood mononuclear cells, co-expression network, gene regulatory networks, genetic variants, expression quantitative trait loci
MeSH terms
Epistasis, Genetic, Humans, Leukocytes, Mononuclear, Genetic Variation, Sequence Analysis, RNA, Quantitative Trait Loci, Gene Regulatory Networks, Genome-Wide Association Study, Single-Cell Analysis, Transcriptome

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