Cited by 74Genomic variations and chromosomal abnormalitiesGenome Rearrangement AlgorithmsGenetics and Neurodevelopmental Disorders

16p11.2-p12.2 duplication syndrome; a genomic condition differentiated from euchromatic variation of 16p11.2

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Barber, John C K, Hall, Victoria, Maloney, Viv K, Huang, Shuwen, Roberts, Angharad M, Brady, Angela F, Foulds, Nicki, Bewes, Beverley +5 more·2013·European Journal of Human Genetics

Abstract

Chromosome 16 contains multiple copy number variations (CNVs) that predispose to genomic disorders. Here, we differentiate pathogenic duplications of 16p11.2-p12.2 from microscopically similar euchromatic variants of 16p11.2. Patient 1 was a girl of 18 with autism, moderate intellectual disability, behavioural difficulties, dysmorphic features and a 7.71-Mb (megabase pair) duplication (16:21 521 005-29 233 146). Patient 2 had a 7.81-Mb duplication (16:21 382 561-29 191 527), speech delay and obsessional behaviour as a boy and, as an adult, short stature, macrocephaly and mild dysmorphism. The duplications contain 65 coding genes of which Polo-like kinase 1 (PLK1) has the highest likelihood of being haploinsufficient and, by implication, a triplosensitive gene. An additional 1.11-Mb CNV of 10q11.21 in Patient 1 was a possible modifier containing the G-protein-regulated inducer of neurite growth 2 (GPRIN2) gene. In contrast, the euchromatic variants in Patients 3 and 4 were amplifications from a 945-kb region containing non-functional immunoglobulin heavy chain (IGHV), hect domain pseudogene (HERC2P4) and TP53-inducible target gene 3 (TP53TG3) loci in proximal 16p11.2 (16:31 953 353-32 898 635). Paralogous pyrosequencing gave a total copy number of 3-8 in controls and 8 to >10 in Patients 3 and 4. The 16p11.2-p12.2 duplication syndrome is a recurrent genomic disorder with a variable phenotype including developmental delay, dysmorphic features, mild to severe intellectual disability, autism, obsessive or stereotyped behaviour, short stature and anomalies of the hands and fingers. It is important to differentiate pathogenic 16p11.2-p12.2 duplications from harmless, microscopically similar euchromatic variants of proximal 16p11.2, especially at prenatal diagnosis.

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Crossref · 10.1038/ejhg.2012.144

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  • Deletions and duplications of 16p11.2 have highly pleiotropic phenotypic effects, with strong links to ASD, ID, motor/developmental delay, dysmorphic features, and epilepsy/seizures.

    “Deletions and duplications of 16p11.2 have highly pleiotropic phenotypic effects, with strong links to ASD [8–19], ID [8, 10, 12, 14–16, 19–21], motor/developmental delay [8–10, 12, 13, 15–19, 22], dysmorphic features [8, 12, 16, 17, 22], and epilepsy/seizures [10, 12, 17].”
  • The human 16p11.2 locus is a roughly 500-600 kb region containing 27-29 genes on the proximal short arm of chromosome 16.

    “The human 16p11.2 gene locus (chromosome 16, position 11.2) is a ~500–600 kb region containing 27–29 genes [4–7] located on the proximal short arm of chromosome 16 [8].”

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Authors
Barber, J. C. K., Hall, V., Maloney, V. K., Huang, S., Roberts, A. M., Brady, A. F., Foulds, N., Bewes, B., Volleth, M., Liehr, T., Mehnert, K., Bateman, M., & White, H.
Affiliations
  • Southampton General Hospital (GB)
  • Salisbury NHS Foundation Trust (GB)
  • Wessex Regional Genetics Laboratory (GB)
  • St Mark's Hospital (GB)
  • Princess Anne Hospital (GB)
  • Otto-von-Guericke-Universität Magdeburg (DE)
  • Jena University Hospital (DE)
  • Genetikum (DE)
Corresponding author
Barber, John C K
Venue
European Journal of Human Genetics
Published
2012-07-25
Volume
21
Issue
2
Pages
182-189
ISSN
  • 1018-4813 (ISSN-L)
  • 1476-5438
OpenAlex
W2051484364
Cited by
74
References
36
Citations by year
2026: 1 · 2025: 4 · 2024: 1 · 2023: 2 · 2022: 1 · 2020: 2 · 2019: 3 · 2018: 37 · 2017: 4 · 2016: 8 · 2015: 2 · 2014: 1 · 2013: 8
FWCI
2.11
Type
journal article
Language
en
Open access
Locations
  • European Journal of Human Genetics (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • ePrints Soton (University of Southampton) (submittedVersion)
Funders
National Institute for Health and Care Research
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
genomic disorders, immunoglobulin heavy chain locus, autism spectrum disorder, intellectual disability, short stature, dysmorphic features, developmental delay
MeSH terms
Abnormalities, Multiple, Polo-Like Kinase 1, Adolescent, Adult, Autistic Disorder, Child, Developmental Disabilities, Child, Preschool, Chromosomes, Human, Pair 16, Female, Humans, Infant, Language Development Disorders, Male, Intellectual Disability, Phenotype, Proto-Oncogene Proteins, Genome, Human, Protein Serine-Threonine Kinases, Cell Cycle Proteins, DNA Copy Number Variations, Chromosome Duplication

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