Cited by 69Genetics and Neurodevelopmental DisordersDevelopmental Biology and Gene RegulationGenomics and Chromatin Dynamics

An SNP in an ultraconserved regulatory element affects Dlx5/Dlx6 regulation in the forebrain

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Poitras, Luc, Yu, Man, Lesage-Pelletier, Cindy, MacDonald, Ryan B., Gagné, Jean-Philippe, Hatch, Gary, Kelly, Isabelle, Hamilton, Steven P. +3 more·2010·Development

Abstract

Dlx homeobox genes play a crucial role in the migration and differentiation of the subpallial precursor cells that give rise to various subtypes of gamma-aminobutyric acid (GABA)-expressing neurons of the forebrain, including local-circuit cortical interneurons. Aberrant development of GABAergic interneurons has been linked to several neurodevelopmental disorders, including epilepsy, schizophrenia, Rett syndrome and autism. Here, we report in mice that a single-nucleotide polymorphism (SNP) found in an autistic proband falls within a functional protein binding site in an ultraconserved cis-regulatory element. This element, I56i, is involved in regulating Dlx5/Dlx6 homeobox gene expression in the developing forebrain. We show that the SNP results in reduced I56i activity, predominantly in the medial and caudal ganglionic eminences and in streams of neurons tangentially migrating to the cortex. Reduced activity is also observed in GABAergic interneurons of the adult somatosensory cortex. The SNP affects the affinity of Dlx proteins for their binding site in vitro and reduces the transcriptional activation of the enhancer by Dlx proteins. Affinity purification using I56i sequences led to the identification of a novel regulator of Dlx gene expression, general transcription factor 2 I (Gtf2i), which is among the genes most often deleted in Williams-Beuren syndrome, a neurodevelopmental disorder. This study illustrates the clear functional consequences of a single nucleotide variation in an ultraconserved non-coding sequence in the context of developmental abnormalities associated with disease.

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Crossref · 10.1242/dev.051052

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  • A point mutation within the I56i enhancer is associated with binding of the transcription factor GTF2I, which is deleted in Williams-Beuren syndrome characterized by hyper-vocalization and hyper-sociability.

    “a point mutation within the I56i enhancer is associated with binding of the transcription factor GTF2I, which is deleted in Williams–Beuren syndrome characterized by hyper-vocalization and hyper-sociability (Poitras, et al. 2010).”
  • DLX5/6-N-Haplotype includes enhancers controlling gene expression in the central nervous system and sequences associated with hyper- or hypo-socialization/vocalization pathologies such as Williams-Beuren syndrome or ASDs.

    “that includes enhancers controlling gene expression in the central nervous system (Fazel Darbandi, et al. 2016) and sequences associated with either hyper- or hypo-socialization/vocalization pathologies such as Williams-Buren syndrome (Poitras, et al. 2010) or ASDs (Gandal, et al. 2018).”
  • GTF2I is associated with Williams-Beuren syndrome, a hyper-sociability and hyper-vocalization neurodevelopmental disorder.

    “a gene associated with Williams–Beuren syndrome, a hyper-sociability and hyper-vocalization neurodevelopmental disorder.”
  • The DLX5/6-N-Haplotype covers DLX6 and DLX5 coding and regulatory sequences including SNPs associated with either hyper- or hypo-sociability and vocalization syndromes.

    “which covers DLX6 and DLX5 coding and regulatory sequences including SNPs associated with either hyper- (Williams–Beuren syndrome) or hypo- (ASDs) sociability and vocalization syndromes (Poitras, et al. 2010).”

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Authors
Poitras, L., Yu, M., Lesage-Pelletier, C., MacDonald, R. B., Gagné, J.-P., Hatch, G., Kelly, I., Hamilton, S. P., Rubenstein, J. L. R., Poirier, G. G., & Ekker, M.
Affiliations
  • University of Ottawa (CA)
  • Center for Advanced Research in Environmental Genomics (CAREG), Department of Biology, University of Ottawa, Ottawa, ON K1N 6N5, Canada
  • Centre hospitalier universitaire de Québec (CA)
  • University of California, San Francisco (US)
Corresponding author
Ekker, Marc
Venue
Development
Published
2010-09-15
Volume
137
Issue
18
Pages
3089-3097
ISSN
  • 0950-1991 (ISSN-L)
  • 1477-9129
OpenAlex
W2111888024
Cited by
69
References
60
Citations by year
2026: 2 · 2025: 2 · 2024: 6 · 2023: 5 · 2022: 2 · 2021: 5 · 2020: 1 · 2019: 3 · 2018: 2 · 2017: 4 · 2016: 6 · 2015: 5 · 2014: 8 · 2013: 7 · 2012: 8
FWCI
3.24
Type
journal article
Language
en
Open access
Locations
  • Development (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Genome Canada
  • Génome Québec
  • Canada Research Chairs
  • Canadian Institutes of Health Research (MOP14460, 74564_1)
  • National Institute of Mental Health (R37MH049428)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
Keywords
single nucleotide polymorphisms, ultraconserved elements, cis-regulatory elements, GTF2I, GABAergic interneurons, forebrain development, tangential migration, Williams syndrome, autism spectrum disorder, transcriptional regulation, neurodevelopmental disorders
MeSH terms
Animals, Base Sequence, Cell Movement, Embryo, Mammalian, Enhancer Elements, Genetic, Humans, Transcription, Genetic, Sequence Alignment, Prosencephalon, Conserved Sequence, Homeodomain Proteins, Gene Expression Regulation, Developmental, Polymorphism, Single Nucleotide, Mice

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