Cited by 132Genomic variations and chromosomal abnormalitiesGenomics and Rare DiseasesGenetics and Neurodevelopmental Disorders

A method for rapid, targeted CNV genotyping identifies rare variants associated with neurocognitive disease

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Mefford, Heather C., Cooper, Gregory M., Zerr, Troy, Smith, Joshua D., Baker, Carl, Shafer, Neil, Thorland, Erik C., Skinner, Cindy +3 more·2009·Genome Research

Abstract

Copy-number variants (CNVs) are substantial contributors to human disease. A central challenge in CNV-disease association studies is to characterize the pathogenicity of rare and possibly incompletely penetrant events, which requires the accurate detection of rare CNVs in large numbers of individuals. Cost and throughput issues limit our ability to perform these studies. We have adapted the Illumina BeadXpress SNP genotyping assay and developed an algorithm, SNP-Conditional OUTlier detection (SCOUT), to rapidly and accurately detect both rare and common CNVs in large cohorts. This approach is customizable, cost effective, highly parallelized, and largely automated. We applied this method to screen 69 loci in 1105 children with unexplained intellectual disability, identifying pathogenic variants in 3.1% of these individuals and potentially pathogenic variants in an additional 2.3%. We identified seven individuals (0.7%) with a deletion of 16p11.2, which has been previously associated with autism. Our results widen the phenotypic spectrum of these deletions to include intellectual disability without autism. We also detected 1.65–3.4 Mbp duplications at 16p13.11 in 1.1% of affected individuals and 350 kbp deletions at 15q11.2, near the Prader-Willi/Angelman syndrome critical region, in 0.8% of affected individuals. Compared to published CNVs in controls they are significantly (P = 4.7 × 10−5 and 0.003, respectively) enriched in these children, supporting previously published hypotheses that they are neurocognitive disease risk factors. More generally, this approach offers a previously unavailable balance between customization, cost, and throughput for analysis of CNVs and should prove valuable for targeted CNV detection in both research and diagnostic settings.

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Authors
Mefford, H. C., Cooper, G. M., Zerr, T., Smith, J. D., Baker, C., Shafer, N., Thorland, E. C., Skinner, C., Schwartz, C. E., Nickerson, D. A., & Eichler, E. E.
Affiliations
  • University of Washington (US)
  • Mayo Clinic (US)
  • Greenwood Genetic Center (US)
  • Howard Hughes Medical Institute (US)
Venue
Genome Research
Published
2009-06-08
Volume
19
Issue
9
Pages
1579-1585
ISSN
1088-9051 (ISSN-L)
OpenAlex
W2162330264
Cited by
132
References
40
Citations by year
2025: 2 · 2024: 3 · 2023: 2 · 2022: 1 · 2021: 2 · 2020: 6 · 2019: 2 · 2018: 4 · 2017: 4 · 2016: 8 · 2015: 11 · 2014: 16 · 2013: 8 · 2012: 15
Type
posted content
Language
en
Open access
Locations
  • Genome Research (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Howard Hughes Medical Institute
  • National Institutes of Health (NIH K12)
  • National Heart, Lung, and Blood Institute (HL 66682, HL66642, U01HL066682, U01HL066642)
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (HD043376, HD043569, K12HD043376, R01HD043569)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genomic variations and chromosomal abnormalities
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genomics and Rare Diseases
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
Keywords
copy number variation, intellectual disability, 16p11.2 deletion, autism spectrum disorder, pathogenic variant identification
MeSH terms
Algorithms, Autistic Disorder, Child, Chromosomes, Human, Pair 15, Chromosomes, Human, Pair 16, Cognition Disorders, Genotype, Humans, Intellectual Disability, Prader-Willi Syndrome, Time Factors, Genetic Variation, Genome, Human, Gene Deletion, Gene Dosage, Computational Biology, Gene Duplication, Polymorphism, Single Nucleotide

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