Cited by 282Genomic variations and chromosomal abnormalitiesGenome Rearrangement AlgorithmsGenetics and Neurodevelopmental Disorders

Extending the phenotype of recurrent rearrangements of 16p11.2: deletions in mentally retarded patients without autism and in normal individuals

Bijlsma, E.K., Gijsbers, A.C.J., Schuurs-Hoeijmakers, J.H.M., van Haeringen, A., Fransen van de Putte, D.E., Anderlid, B.-M., Lundin, J., Lapunzina, P. +17 more·2009·European Journal of Medical Genetics

Abstract

Array CGH (comparative genomic hybridization) screening of large patient cohorts with mental retardation and/or multiple congenital anomalies (MR/MCA) has led to the identification of a number of new microdeletion and microduplication syndromes. Recently, a recurrent copy number variant (CNV) at chromosome 16p11.2 was reported to occur in up to 1% of autistic patients in three large autism studies. In the screening of 4284 patients with MR/MCA with various array platforms, we detected 22 individuals (14 index patients and 8 family members) with deletions in 16p11.2, which are genomically identical to those identified in the autism studies. Though some patients shared a facial resemblance and a tendency to overweight, there was no evidence for a recognizable phenotype. Autism was not the presenting feature in our series. The assembled evidence indicates that recurrent 16p11.2 deletions are associated with variable clinical outcome, most likely arising from haploinsufficiency of one or more genes. The phenotypical spectrum ranges from MR and/or MCA, autism, learning and speech problems, to a normal phenotype.

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Crossref · 10.1016/j.ejmg.2009.03.006

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  • Epilepsy/seizures ranks among the most common phenotypes observed in both 16p11.2 deletions and duplications.

    “Epilepsy/seizures ranks among the most common phenotypes observed in both 16p11.2 deletions and duplications [10, 12, 16, 17, 33, 36] (Table 2).”
  • In individuals with neurodevelopmental disorders, genetic screenings find 16p11.2 deletions at rates of 0.25-2.9% and duplications at rates of 0.15-0.78%.

    “Data compiled from eight studies [13, 15–17, 20, 24, 26, 33] screening individuals with either ASD, ID, developmental delay (DD), dysmorphic features (DF), multiple congenital anomalies (MCA), obesity, or seizures find 16p11.2 deletions at rates of 0.25–2.9%, and duplications at rates between 0.15–0.78% (Table 1).”
  • Clinical phenotypes associated with rearrangements at 1q21.1 and 16p11.2 are diverse and include pediatric neurodevelopmental disorders and adult psychiatric conditions.

    “The clinical phenotypes associated with a single allele are diverse and include pediatric neurodevelopmental disorders and adult psychiatric conditions.”

    From CNVs: Harbingers of a Rare Variant Revolution in Psychiatric Genetics (2012) · cites this paper as Bijlsma et al., 2009

  • 16p11 duplications are observed in ASD, schizophrenia, and various forms of developmental delay.

    “Such is certainly the case with 16p11 duplications, which are observed in ASD, schizophrenia, and various forms of developmental delay [37–39]”

    From Genetics of autism spectrum disorders (2011) · cites this paper as [38]

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Authors
Bijlsma, E. K., Gijsbers, A. C. J., Schuurs-Hoeijmakers, J. H. M., van Haeringen, A., Fransen van de Putte, D. E., Anderlid, B.-M., Lundin, J., Lapunzina, P., Pérez Jurado, L. A., Delle Chiaie, B., Loeys, B., Menten, B., Oostra, A., Verhelst, H., Amor, D. J., Bruno, D. L., van Essen, A. J., Hordijk, R., Sikkema-Raddatz, B., Verbruggen, K. T., Jongmans, M. C. J., Pfundt, R., Reeser, H. M., Breuning, M. H., & Ruivenkamp, C. A. L.
Affiliations
  • Leiden University Medical Center (NL)
  • Karolinska University Hospital (SE)
  • Hospital Universitario La Paz (ES)
  • Ghent University Hospital (BE)
  • Royal Children's Hospital (AU)
  • University Medical Center Groningen (NL)
  • Radboud University Medical Center (NL)
  • Haga Hospital (NL)
Corresponding author
Bijlsma, E.K.
Venue
European Journal of Medical Genetics
Publisher
Elsevier BV
Published
2009-03
Volume
52
Issue
2-3
Pages
77-87
ISSN
1769-7212 (ISSN-L)
OpenAlex
W2107876174
Cited by
282
References
25
Citations by year
2026: 1 · 2025: 2 · 2024: 10 · 2023: 7 · 2022: 10 · 2021: 19 · 2020: 13 · 2019: 10 · 2018: 11 · 2017: 11 · 2016: 8 · 2015: 14 · 2014: 16 · 2013: 15 · 2012: 31
FWCI
26.32
Type
journal article
Language
en
Open access
closed
Locations
  • European Journal of Medical Genetics (publishedVersion)
  • PubMed (publishedVersion)
  • Ghent University Academic Bibliography (Ghent University) (submittedVersion)
  • DIGITAL.CSIC (Spanish National Research Council (CSIC)) (submittedVersion)
  • University of Groningen research database (University of Groningen / Centre for Information Technology) (submittedVersion)
  • Radboud Repository (Radboud University) (submittedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genomic variations and chromosomal abnormalities
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genome Rearrangement Algorithms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
Keywords
16p11.2 deletion, copy number variation, intellectual disability, multiple congenital anomalies, autism spectrum disorder, haploinsufficiency, microdeletion syndromes, phenotypic variability, face similarity
MeSH terms
Abnormalities, Multiple, Adolescent, Adult, Autistic Disorder, Child, Child, Preschool, Chromosome Deletion, Chromosomes, Human, Pair 16, DNA Mutational Analysis, Family Health, Female, Genetic Testing, Humans, Infant, Learning Disabilities, Male, Intellectual Disability, Speech Disorders, Comparative Genomic Hybridization, Young Adult

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