Cited by 10Genetics and Neurodevelopmental DisordersGenomics and Rare DiseasesGenomic variations and chromosomal abnormalities

Is there a Mendelian transmission ratio distortion of the c.429_452dup(24bp) polyalanine tract ARX mutation?

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Shoubridge, Cheryl, Gardner, Alison, Schwartz, Charles E, Hackett, Anna, Field, Michael, Gecz, Jozef·2012·European Journal of Human Genetics

Abstract

Intellectual disability is common. Aristaless-related homeobox (ARX) gene is one of the most frequently mutated and pleiotropic genes, implicated in 10 different phenotypes. More than half of ~100 reported cases with ARX mutations are due to a recurrent duplication of 24 bp, c.429_452dup, which leads to polyalanine tract expansion. The excess of affected males among the offspring of the obligate carrier females raised the possibility of transmission ratio distortion for the c.429_452dup mutation. We found a significant deviation from the expected Mendelian 1:1 ratio of transmission in favour of the c.429_452dup ARX mutation. We hypothesise that the preferential transmission of the c.429_452dup mutation may be due to asymmetry of meiosis in the oocyte. Our findings may have implications for genetic counselling of families segregating the c.429_452dup mutation and allude to putative role of ARX in oocyte biology.

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Crossref · 10.1038/ejhg.2012.61

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Authors
Shoubridge, C., Gardner, A., Schwartz, C. E., Hackett, A., Field, M., & Gecz, J.
Affiliations
  • South Australia Pathology (AU)
  • Greenwood Genetic Center (US)
  • Hunter Genetics (AU)
Corresponding author
Shoubridge, Cheryl
Venue
European Journal of Human Genetics
Published
2012-04-11
Volume
20
Issue
12
Pages
1311-1314
ISSN
  • 1018-4813 (ISSN-L)
  • 1476-5438
OpenAlex
W1996507669
Cited by
10
References
51
Citations by year
2026: 1 · 2023: 1 · 2021: 1 · 2020: 1 · 2019: 1 · 2018: 1 · 2016: 1 · 2013: 2 · 2012: 1
FWCI
0.58
Type
journal article
Language
en
Open access
Locations
  • European Journal of Human Genetics (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Adelaide Research & Scholarship (AR&S) (University of Adelaide) (submittedVersion)
Funders
  • National Institutes of Health (5r01hd026202-15)
  • National Health and Medical Research Council (400121)
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (R01-HD026202, HD 26202)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genomics and Rare Diseases
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genomic variations and chromosomal abnormalities
Keywords
ARX gene, polyalanine tract expansion, segregation distortion, intellectual disability, sex ratio distortion, genetic counseling, oocyte biology
MeSH terms
Alanine, Female, Heterozygote, Humans, Male, Meiosis, Mutation, Oocytes, Pedigree, Repetitive Sequences, Nucleic Acid, Transcription Factors, Homeodomain Proteins, Inheritance Patterns

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