Cited by 424Autism Spectrum Disorder ResearchGenomic variations and chromosomal abnormalitiesGenetics and Neurodevelopmental Disorders

Genome-wide analyses of exonic copy number variants in a family-based study point to novel autism susceptibility genes

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Bucan, Maja, Abrahams, Brett S., Wang, Kai, Glessner, Joseph T., Herman, Edward I., Sonnenblick, Lisa I., Alvarez Retuerto, Ana I., Imielinski, Marcin +28 more·2009·PLoS Genetics

Abstract

The genetics underlying the autism spectrum disorders (ASDs) is complex and remains poorly understood. Previous work has demonstrated an important role for structural variation in a subset of cases, but has lacked the resolution necessary to move beyond detection of large regions of potential interest to identification of individual genes. To pinpoint genes likely to contribute to ASD etiology, we performed high density genotyping in 912 multiplex families from the Autism Genetics Resource Exchange (AGRE) collection and contrasted results to those obtained for 1,488 healthy controls. Through prioritization of exonic deletions (eDels), exonic duplications (eDups), and whole gene duplication events (gDups), we identified more than 150 loci harboring rare variants in multiple unrelated probands, but no controls. Importantly, 27 of these were confirmed on examination of an independent replication cohort comprised of 859 cases and an additional 1,051 controls. Rare variants at known loci, including exonic deletions at NRXN1 and whole gene duplications encompassing UBE3A and several other genes in the 15q11-q13 region, were observed in the course of these analyses. Strong support was likewise observed for previously unreported genes such as BZRAP1, an adaptor molecule known to regulate synaptic transmission, with eDels or eDups observed in twelve unrelated cases but no controls (p = 2.3x10(-5)). Less is known about MDGA2, likewise observed to be case-specific (p = 1.3x10(-4)). But, it is notable that the encoded protein shows an unexpectedly high similarity to Contactin 4 (BLAST E-value = 3x10(-39)), which has also been linked to disease. That hundreds of distinct rare variants were each seen only once further highlights complexity in the ASDs and points to the continued need for larger cohorts.

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Authors
Bucan, M., Abrahams, B. S., Wang, K., Glessner, J. T., Herman, E. I., Sonnenblick, L. I., Alvarez Retuerto, A. I., Imielinski, M., Hadley, D., Bradfield, J. P., Kim, C., Gidaya, N. B., Lindquist, I., Hutman, T., Sigman, M., Kustanovich, V., Lajonchere, C. M., Singleton, A., Kim, J., Wassink, T. H., McMahon, W. M., Owley, T., Sweeney, J. A., Coon, H., Nurnberger, J. I., Li, M., Cantor, R. M., Minshew, N. J., Sutcliffe, J. S., Cook, E. H., Dawson, G., Buxbaum, J. D., Grant, S. F. A., Schellenberg, G. D., Geschwind, D. H., & Hakonarson, H.
Affiliations
  • University of California, Los Angeles (US)
  • Children's Hospital of Philadelphia (US)
  • University of Pennsylvania (US)
  • Autism Speaks (US)
  • National Institutes of Health (US)
  • University of Iowa (US)
  • University of Utah (US)
  • University of Illinois Chicago (US)
  • University of Pittsburgh (US)
  • Vanderbilt University (US)
  • Icahn School of Medicine at Mount Sinai (US)
Corresponding author
Hakonarson, Hakon
Venue
PLoS Genetics
Published
2009-06-26
Volume
5
Issue
6
Pages
e1000536
ISSN
  • 1553-7390 (ISSN-L)
  • 1553-7404
OpenAlex
W2125432692
Cited by
424
References
60
Citations by year
2026: 12 · 2025: 9 · 2024: 9 · 2023: 13 · 2022: 9 · 2021: 15 · 2020: 16 · 2019: 16 · 2018: 18 · 2017: 24 · 2016: 24 · 2015: 24 · 2014: 39 · 2013: 36 · 2012: 46
FWCI
25.74
Type
journal article
Language
en
Open access
Locations
  • PLoS Genetics (publishedVersion, public-domain)
  • PubMed Central (publishedVersion, public-domain)
  • PubMed (publishedVersion)
  • D-Scholarship@Pitt (University of Pittsburgh) (acceptedVersion)
  • Carolina Digital Repository (University of North Carolina at Chapel Hill) (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • DukeSpace (Duke University) (submittedVersion, cc-by-nc-nd)
  • eScholarship (California Digital Library) (submittedVersion)
  • eScholarship (California Digital Library) (submittedVersion, public-domain)
  • Figshare (submittedVersion, cc-by)
  • UNC Libraries
Funders
  • U.S. Department of Health and Human Services
  • Autism Speaks
  • Massachusetts General Hospital
  • Yale University
  • Children's Hospital of Philadelphia (UL1-RR-024134)
  • University of Pennsylvania
  • Emory University
  • George Washington University
  • National Alliance for Research on Schizophrenia and Depression
  • Cotswold Foundation
  • National Institutes of Health (Z01-AG000949)
  • National Institute on Aging (K24AG000949, Z01AG000949)
  • National Institute of Mental Health (U24MH081810, MH081754, R01MH081754, R01MH604687)
  • National Institute of General Medical Sciences (P20GM069012, P20-GM69012)
  • National Center for Research Resources (UL1-RR024134-03, UL1RR024134)
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (P50HD055784)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Autism Spectrum Disorder Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genomic variations and chromosomal abnormalities
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
Keywords
autism spectrum disorder, copy number variation, exon deletion, autism susceptibility genes, structural variants, multiplex families, NRXN1, UBE3A, 15q11-q13, rare variants, gene prioritization
MeSH terms
Adolescent, Autistic Disorder, Calcium-Binding Proteins, Child, Child, Preschool, Exons, Female, Humans, Male, Nerve Tissue Proteins, Pedigree, Cohort Studies, Cell Adhesion Molecules, Neuronal, Case-Control Studies, Sequence Deletion, Gene Dosage, Neural Cell Adhesion Molecules, Genetic Predisposition to Disease, Gene Duplication, Ubiquitin-Protein Ligases, Genome-Wide Association Study, Young Adult

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