Cited by 231Autism Spectrum Disorder ResearchGenetic Associations and EpidemiologyGenetics and Neurodevelopmental Disorders

A noise-reduction GWAS analysis implicates altered regulation of neurite outgrowth and guidance in autism

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Hussman, John P, Chung, Ren-Hua, Griswold, Anthony J, Jaworski, James M, Salyakina, Daria, Ma, Deqiong, Konidari, Ioanna, Whitehead, Patrice L +6 more·2011·Molecular Autism

Abstract

Background: Genome-wide Association Studies (GWAS) have proved invaluable for the identification of disease susceptibility genes. However, the prioritization of candidate genes and regions for follow-up studies often proves difficult due to false-positive associations caused by statistical noise and multiple-testing. In order to address this issue, we propose the novel GWAS noise reduction (GWAS-NR) method as a way to increase the power to detect true associations in GWAS, particularly in complex diseases such as autism. Methods: GWAS-NR utilizes a linear filter to identify genomic regions demonstrating correlation among association signals in multiple datasets. We used computer simulations to assess the ability of GWAS-NR to detect association against the commonly used joint analysis and Fisher's methods. Furthermore, we applied GWAS-NR to a family-based autism GWAS of 597 families and a second existing autism GWAS of 696 families from the Autism Genetic Resource Exchange (AGRE) to arrive at a compendium of autism candidate genes. These genes were manually annotated and classified by a literature review and functional grouping in order to reveal biological pathways which might contribute to autism aetiology. Results: Computer simulations indicate that GWAS-NR achieves a significantly higher classification rate for true positive association signals than either the joint analysis or Fisher's methods and that it can also achieve this when there is imperfect marker overlap across datasets or when the closest disease-related polymorphism is not directly typed. In two autism datasets, GWAS-NR analysis resulted in 1535 significant linkage disequilibrium (LD) blocks overlapping 431 unique reference sequencing (RefSeq) genes. Moreover, we identified the nearest RefSeq gene to the non-gene overlapping LD blocks, producing a final candidate set of 860 genes. Functional categorization of these implicated genes indicates that a significant proportion of them cooperate in a coherent pathway that regulates the directional protrusion of axons and dendrites to their appropriate synaptic targets. Conclusions: As statistical noise is likely to particularly affect studies of complex disorders, where genetic heterogeneity or interaction between genes may confound the ability to detect association, GWAS-NR offers a powerful method for prioritizing regions for follow-up studies. Applying this method to autism datasets, GWAS-NR analysis indicates that a large subset of genes involved in the outgrowth and guidance of axons and dendrites is implicated in the aetiology of autism.

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Research works printed but not linked: 7

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Authors
Hussman, J. P., Chung, R.-H., Griswold, A. J., Jaworski, J. M., Salyakina, D., Ma, D., Konidari, I., Whitehead, P. L., Vance, J. M., Martin, E. R., Cuccaro, M. L., Gilbert, J. R., Haines, J. L., & Pericak-Vance, M. A.
Affiliations
  • University of Miami (US)
  • Vanderbilt University (US)
Venue
Molecular Autism
Published
2011-01-19
Volume
2
Issue
1
Pages
1-1
ISSN
2040-2392 (ISSN-L)
OpenAlex
W2160038617
Cited by
231
References
78
Citations by year
2026: 7 · 2025: 4 · 2024: 12 · 2023: 7 · 2022: 11 · 2021: 13 · 2020: 9 · 2019: 16 · 2018: 13 · 2017: 25 · 2016: 24 · 2015: 21 · 2014: 24 · 2013: 23 · 2012: 15
FWCI
11.21
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Molecular Autism (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Funders
  • Autism Speaks
  • Hussman Foundation
  • National Institutes of Health (NS26630)
  • Medical Research Council
  • National Institute of Mental Health (R01MH080647)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Autism Spectrum Disorder Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Associations and Epidemiology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
Keywords
autism spectrum disorder, candidate gene prioritization, multiple testing correction, linkage disequilibrium blocks, neurite outgrowth, autism candidate genes, autism etiology

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