Cited by 305Genomic variations and chromosomal abnormalitiesAutism Spectrum Disorder ResearchGenetics and Neurodevelopmental Disorders

Array-based comparative genomic hybridisation identifies high frequency of cryptic chromosomal rearrangements in patients with syndromic autism spectrum disorders

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Jacquemont, M-L, Sanlaville, D, Redon, R, Raoul, O, Cormier-Daire, V, Lyonnet, S, Amiel, J, Le Merrer, M +8 more·2006·Journal of Medical Genetics

Abstract

Background: Autism spectrum disorders (ASD) refer to a broader group of neurobiological conditions, pervasive developmental disorders. They are characterised by a symptomatic triad associated with qualitative changes in social interactions, defect in communication abilities, and repetitive and stereotyped interests and activities. ASD is prevalent in 1 to 3 per 1000 people. Despite several arguments for a strong genetic contribution, the molecular basis of a most cases remains unexplained. About 5% of patients with autism have a chromosome abnormality visible with cytogenetic methods. The most frequent are 15q11–q13 duplication, 2q37 and 22q13.3 deletions. Many other chromosomal imbalances have been described. However, most of them remain undetectable using routine karyotype analysis, thus impeding diagnosis and genetic counselling. Methods and results: 29 patients presenting with syndromic ASD were investigated using a DNA microarray constructed from large insert clones spaced at approximately 1 Mb intervals across the genome. Eight clinically relevant rearrangements were identified in 8 (27.5%) patients: six deletions and two duplications. Altered segments ranged in size from 1.4 to 16 Mb (2–19 clones). No recurrent abnormality was identified. Conclusion: These results clearly show that array comparative genomic hybridisation should be considered to be an essential aspect of the genetic analysis of patients with syndromic ASD. Moreover, besides their importance for diagnosis and genetic counselling, they may allow the delineation of new contiguous gene syndromes associated with ASD. Finally, the detailed molecular analysis of the rearranged regions may pave the way for the identification of new ASD genes.

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Authors
Jacquemont, M.-L., Sanlaville, D., Redon, R., Raoul, O., Cormier-Daire, V, Lyonnet, S., Amiel, J., Le Merrer, M., Heron, D., de Blois, M.-C., Prieur, M., Vekemans, M., Carter, N. P., Munnich, A., Colleaux, L., & Philippe, A.
Affiliations
  • Hôpital Necker-Enfants Malades (FR)
  • Wellcome Sanger Institute (GB)
Corresponding author
Philippe, A
Venue
Journal of Medical Genetics
Publisher
BMJ
Published
2006-07-13
Volume
43
Issue
11
Pages
843-849
ISSN
  • 0022-2593 (ISSN-L)
  • 1468-6244
OpenAlex
W2148468839
Cited by
305
References
51
Citations by year
2026: 2 · 2025: 3 · 2024: 6 · 2023: 7 · 2022: 3 · 2021: 10 · 2020: 13 · 2019: 7 · 2018: 6 · 2017: 12 · 2016: 14 · 2015: 13 · 2014: 23 · 2013: 17 · 2012: 21
FWCI
19.16
Type
journal article
Language
en
Open access
Locations
  • Journal of Medical Genetics (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • HAL (submittedVersion)
Funders
Wellcome Trust (077008)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genomic variations and chromosomal abnormalities
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Autism Spectrum Disorder Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
Keywords
autism spectrum disorder, syndromic autism, cryptic chromosomal rearrangements, chromosomal microdeletion, chromosomal duplication, contiguous gene syndrome, genetic counseling, array comparative genomic hybridization, 22q13.3 deletion
MeSH terms
Adolescent, Adult, Child, Child Development Disorders, Pervasive, Chromosome Aberrations, Chromosomes, Human, Female, Genetic Testing, Humans, Male, Syndrome, Oligonucleotide Array Sequence Analysis, Genomics

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