Cited by 85Genetics and Neurodevelopmental DisordersGenomic variations and chromosomal abnormalitiesAutism Spectrum Disorder Research

Dysfunction of SHANK2 and CHRNA7 in a patient with intellectual disability and language impairment supports genetic epistasis of the two loci

Chilian, B, Abdollahpour, H, Bierhals, T, Haltrich, I, Fekete, G, Nagel, I, Rosenberger, G, Kutsche, K·2013·Clinical Genetics

Abstract

Synaptopathies constitute a group of neurological diseases including autism spectrum disorders (ASD) and intellectual disability (ID). They have been associated with mutations in genes encoding proteins important for the formation and stabilization of synapses, such as SHANK1-3. Loss-of-function mutations in the SHANK genes have been identified in individuals with ASD and ID suggesting that other factors modify the neurological phenotype. We report a boy with severe ID, behavioral anomalies, and language impairment who carries a balanced de novo triple translocation 46,XY,t(11;17;19)(q13.3;q25.1;q13.42). The 11q13.3 breakpoint was found to disrupt the SHANK2 gene. The patient also carries copy number variations at 15q13.3 and 10q22.11 encompassing ARHGAP11B and two synaptic genes. The CHRNA7 gene encoding α7-nicotinic acetylcholine receptor subunit and the GPRIN2 gene encoding G-protein-regulated inducer of neurite growth 2 were duplicated. Co-occurrence of a de novo SHANK2 mutation and a CHRNA7 duplication in two reported patients with ASD and ID as well as in the patient with t(11;17;19), severe ID and behavior problems suggests convergence of these genes on a common synaptic pathway. Our results strengthen the oligogenic inheritance model and highlight the presence of a large effect mutation and modifier genes collectively determining phenotypic expression of the synaptopathy.

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Crossref · 10.1111/cge.12105

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Authors
Chilian, B., Abdollahpour, H., Bierhals, T., Haltrich, I., Fekete, G., Nagel, I., Rosenberger, G., & Kutsche, K.
Affiliations
  • University Medical Center Hamburg-Eppendorf (DE)
  • Semmelweis University (HU)
  • Christian-Albrechts-Universität zu Kiel (DE)
Corresponding author
Kutsche, K
Venue
Clinical Genetics
Publisher
Wiley
Published
2013-02-21
Volume
84
Issue
6
Pages
560-565
ISSN
  • 0009-9163 (ISSN-L)
  • 1399-0004
OpenAlex
W1939889341
Cited by
85
References
32
Citations by year
2026: 1 · 2025: 2 · 2024: 16 · 2023: 4 · 2022: 8 · 2021: 7 · 2020: 6 · 2018: 6 · 2017: 4 · 2016: 4 · 2015: 11 · 2014: 12 · 2013: 4
FWCI
6.85
Type
journal article
Language
en
Open access
closed
Locations
  • Clinical Genetics (publishedVersion)
  • PubMed (publishedVersion)
  • Semmelweis University Repository (Semmelweis University) (submittedVersion)
Funders
Deutsche Forschungsgemeinschaft
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genomic variations and chromosomal abnormalities
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Autism Spectrum Disorder Research
Keywords
Shank2, CHRNA7, intellectual disability, language impairment, synaptopathy, genetic epistasis, oligogenic inheritance, de novo translocation, copy number variation, 15q13.3, alpha7 nicotinic acetylcholine receptor, autism spectrum disorder, genetic modifiers, synaptic genes
MeSH terms
Epistasis, Genetic, Humans, Infant, Male, Intellectual Disability, Nerve Tissue Proteins, Phenotype, Translocation, Genetic, In Situ Hybridization, Fluorescence, Facies, Comparative Genomic Hybridization, Genetic Association Studies, DNA Copy Number Variations, alpha7 Nicotinic Acetylcholine Receptor

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