Cited by 50Schizophrenia research and treatmentGenetic Associations and EpidemiologyGenomic variations and chromosomal abnormalities

Exome arrays capture polygenic rare variant contributions to schizophrenia

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Richards, A. L., Leonenko, G., Walters, J. T., Kavanagh, D. H., Rees, E. G., Evans, A., Chambert, K. D., Moran, J. L. +7 more·2016·Human Molecular Genetics

Abstract

Schizophrenia is a highly heritable disorder. Genome-wide association studies based largely on common alleles have identified over 100 schizophrenia risk loci, but it is also evident from studies of copy number variants (CNVs) and from exome-sequencing studies that rare alleles are also involved. Full characterization of the contribution of rare alleles to the disorder awaits the deployment of sequencing technology in very large sample sizes, meanwhile, as an interim measure, exome arrays allow rare non-synonymous variants to be sampled at a fraction of the cost. In an analysis of exome array data from 13 688 individuals (5585 cases and 8103 controls) from the UK, we found that rare (minor allele frequency < 0.1%) variant association signal was enriched among genes that map to autosomal loci that are genome-wide significant (GWS) in common variant studies of schizophrenia genome-wide association study (PGWAS = 0.01) as well as gene sets known to be enriched for rare variants in sequencing studies (PRARE = 0.026). We also identified the gene-wise equivalent of GWS support for WDR88 (WD repeat-containing protein 88), a gene of unknown function (P = 6.5 × 10(-7)). Rare alleles represented on exome chip arrays contribute to the genetic architecture of schizophrenia, but as is the case for GWAS, very large studies are required to reveal additional susceptibility alleles for the disorder.

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  • For less-rare segregating variants of even modest allele frequencies, the authors were unable to detect any excess in affected relative to unaffected individuals.

    “For less-rare (segregating) variants of even modest allele frequencies, we were unable to detect any excess in affected relative to unaffected individuals, consistent with a previous analysis of non-ultra-rare exonic variants in other cohorts47.”

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Authors
Richards, A. L., Leonenko, G., Walters, J. T., Kavanagh, D. H., Rees, E. G., Evans, A., Chambert, K. D., Moran, J. L., Goldstein, J., Neale, B. M., McCarroll, S. A., Pocklington, A. J., Holmans, P. A., Owen, M. J., & O'Donovan, M. C.
Affiliations
  • Cardiff University (GB)
  • Broad Institute (US)
Venue
Human Molecular Genetics
Published
2016-01-05
Volume
25
Issue
5
Pages
1001-1007
ISSN
  • 0964-6906 (ISSN-L)
  • 1460-2083
OpenAlex
W2274013562
Cited by
50
References
45
Citations by year
2025: 1 · 2024: 2 · 2023: 3 · 2022: 8 · 2021: 4 · 2020: 7 · 2019: 8 · 2018: 5 · 2017: 7 · 2016: 5
FWCI
7.41
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Human Molecular Genetics (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • ORCA Online Research @Cardiff (Cardiff University) (acceptedVersion)
  • Digital Access to Scholarship at Harvard (DASH) (Harvard University) (submittedVersion, cc-by)
  • HighWire Press Open Archive (submittedVersion)
Funders
  • Medical Research Council (MRC) Centre (G0800509)
  • Program Grants (G0801418)
  • the European Community's Seventh Framework Programme (HEALTH-F2-2010-241909)
  • Stanley Center for Psychiatric Research
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Schizophrenia research and treatment
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Associations and Epidemiology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genomic variations and chromosomal abnormalities
Keywords
schizophrenia, rare variants, polygenic risk, non-synonymous variants, genetic architecture, copy number variation, genetic susceptibility loci
MeSH terms
Alleles, Female, Gene Frequency, Humans, Male, Nerve Tissue Proteins, Proteins, Schizophrenia, Case-Control Studies, Sample Size, Quantitative Trait, Heritable, Genetic Predisposition to Disease, Oligonucleotide Array Sequence Analysis, Polymorphism, Single Nucleotide, Quantitative Trait Loci, Genome-Wide Association Study, DNA Copy Number Variations, Exome

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