An SNP in an ultraconserved regulatory element affects Dlx5/Dlx6 regulation in the forebrain
Open accessAbstract
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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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).”
From <i>DLX5/6</i> GABAergic Expression Affects Social Vocalization: Implications for Human Evolution (2021) · cites this paper as 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).”
From <i>DLX5/6</i> GABAergic Expression Affects Social Vocalization: Implications for Human Evolution (2021) · cites this paper as Poitras, et al. 2010
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.”
From <i>DLX5/6</i> GABAergic Expression Affects Social Vocalization: Implications for Human Evolution (2021) · cites this paper as Poitras, et al. 2010
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).”
From <i>DLX5/6</i> GABAergic Expression Affects Social Vocalization: Implications for Human Evolution (2021) · cites this paper as Poitras, et al. 2010
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“…mutations have not been proven to cause neuropsychiatric disorders, we suggest that Dlx alleles could sensitize to disease (Hamilton et al. 2005; Poitras et al. 2010), which is supported by the observation that multiple Dlxregulated genes are implicated in human brain disorders, including Arx,…”
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“…the migration and differentiation of GABA-expressing neurons in the forebrain: This regulatory element has been found mutated in people with ASD (Poitras et al. 2010) and it is bound by GTF2I, encoded by one of the genes commonly deleted in Williams-Beuren syndrome and a candidate for ASD too…”
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Associating schizophrenia, long non-coding RNAs and neurostructural dynamics
Merelo, V., Durand, D., Lescallette, A. R., Vrana, K. E., Hong, L. E., Faghihi, M. A., & Bellon, A. (2015) · Frontiers in Molecular Neuroscience · doi:10.3389/fnmol.2015.00057 · Cited by 37 · see citing works
“Dlx homeobox genes products play a crucial role in migration and differentiation of the subpallial precursor cells that give rise to various subtypes of gamma-aminobutiric acid (GABA)-expressing neurons of the forebrain, including localcircuit cortical interneurons (Poitras et al., 2010).”
BackgroundToward the Language Oscillogenome
Murphy, E., & Benítez‐Burraco, A. (2018) · Frontiers in Psychology · doi:10.3389/fpsyg.2018.01999 · Cited by 30 · see citing works
“DLX5, DLX6, and MECP2 GAD1 interacts with DLX5 and DLX6, two genes that encode homeobox transcription factors important for GABAergic interneuron development (Cobos et al., 2006; Ghanem et al., 2008; Poitras et al., 2010).”
BackgroundDeveloping zebrafish experimental animal models relevant to schizophrenia
Demin, K. A., Мешалкина, Д. А., Volgin, A. D., Yakovlev, O. V., de Abreu, M. S., Alekseeva, P. A., Friend, A. J., Lakstygal, A. M., Zabegalov, K. N., Amstislavskaya, T. G., et al. (2019) · Neuroscience & Biobehavioral Reviews · doi:10.1016/j.neubiorev.2019.07.017 · Cited by 30 · see citing works
<i>DLX5/6</i> GABAergic Expression Affects Social Vocalization: Implications for Human Evolution
Levi, G., de Lombares, C., Giuliani, C., Iannuzzi, V., Aouci, R., Garagnani, P., Franceschi, C., Grimaud-Hervé, D., & Narboux-Nême, N. (2021) · Molecular Biology and Evolution · doi:10.1093/molbev/msab181 · Cited by 29 · see citing works
Ultraconserved Elements Occupy Specific Arenas of Three-Dimensional Mammalian Genome Organization
McCole, R. B., Erceg, J., Saylor, W., & Wu, C.-T. (2018) · Cell Reports · doi:10.1016/j.celrep.2018.06.031 · Cited by 29 · see citing works
Gillespie, B., Panthi, S., Sundram, S., & Hill, R. (2023) · Neuroscience & Biobehavioral Reviews · doi:10.1016/j.neubiorev.2023.105488 · Cited by 30 · see citing works
“1 pathway in schizophrenia (Malt et al., 2016; Kathuria et al., 2020; Volk et al., 2012), and associations between mutations in ARX (Sherr, 2003) and multiple DLX genes (Liu et al., 2009; Poitras et al., 2010) with ASD.”
DLX genes and proteins in mammalian forebrain development
Rubenstein, J. L. R., Nord, A. S., & Ekker, M. (2024) · Development · doi:10.1242/dev.202684 · Cited by 27 · see citing works
Fung, L. K., Quintin, E., Haas, B. W., & Reiss, A. L. (2012) · Current Opinion in Neurology · doi:10.1097/wco.0b013e328351823c · Cited by 27 · see citing works
The evolution of ultraconserved elements with different phylogenetic origins
Ryu, T., Seridi, L., & Ravasi, T. (2012) · BMC Evolutionary Biology · doi:10.1186/1471-2148-12-236 · Cited by 28 · see citing works
“Single nucleotide polymorphisms (SNPs) in UCEs have been linked to cancer risk, impaired TF binding, and homeobox gene regulation in the central nervous system [11,12].”
BackgroundViturawong, T., Meissner, F., Butter, F., & Mann, M. (2013) · Cell Reports · doi:10.1016/j.celrep.2013.09.022 · Cited by 27 · see citing works
Lens development depends on a pair of highly conserved Sox21 regulatory elements
Pauls, S., Smith, S. F., & Elgar, G. S. (2012) · Developmental Biology · doi:10.1016/j.ydbio.2012.02.025 · Cited by 25 · see citing works
Santos‐Terra, J., Deckmann, I., Fontes‐Dutra, M., Schwingel, G. B., Bambini-Júnior, V., & Gottfried, C. (2021) · International Journal of Developmental Neuroscience · doi:10.1002/jdn.10141 · Cited by 24 · see citing works
“, 2005) decreased DLX5/6 transcriptional activity in GABAergic interneurons from embryonic to postnatal life (Poitras et al., 2010), impairing cell migration, maturation, and survival (Lindtner et al.”
BackgroundMcCole, R. B., Fonseka, C. Y., Koren, A., & Wu, C.-T. (2014) · PLoS Genetics · doi:10.1371/journal.pgen.1004646 · Cited by 23 · see citing works
Combinatorial Gene Regulatory Functions Underlie Ultraconserved Elements in Drosophila
Warnefors, M., Hartmann, B., Thomsen, S., & Alonso, C. R. (2016) · Molecular Biology and Evolution · doi:10.1093/molbev/msw101 · Cited by 22 · see citing works
“…to link mutations in UCEs to phenotypic outcomes (Drake et al. 2006; Ahituv et al. 2007; Chen et al. 2007; Yang et al. 2008; Catucci et al. 2009; Poitras et al. 2010; Chiang et al. 2012), a recent survey of 11 insertions into Drosophila UCEs identified four as recessive lethal (Makunin et al.…”
BackgroundSingle-Cell Transcriptomics Supports a Role of CHD8 in Autism
Hoffmann, A., & Spengler, D. (2021) · International Journal of Molecular Sciences · doi:10.3390/ijms22063261 · Cited by 19 · see citing works
“In mice, a splice variant of Dlx6-AS1, called Dlx6-AS2, cooperates with Dlx1 and Dlx2 proteins in coactivation of the Dlx5/Dlx6 enhancer [77] and promotes differentiation of GABAergic interneurons in the developing forebrain [78,79].”
BackgroundJarinova, O., & Ekker, M. (2012) · Human Mutation · doi:10.1002/humu.22083 · Cited by 18 · see citing works
“This example illustrates how a combination of experimental approaches can provide important insights into the biological significance of regulatory changes in the context of human disease [Poitras et al., 2010].”
BackgroundMethodLncRNAs in neuropsychiatric disorders and computational insights for their prediction
Baruah, C., Nath, P., & Barah, P. (2022) · Molecular Biology Reports · doi:10.1007/s11033-022-07819-x · Cited by 17 · see citing works
“Dlx expression brings about the migration and differentiation of subpallial cells that are precursors of various subtypes of GABA [ 10, 11, 23].”
BackgroundLossie, A. C., Muir, W. M., Lo, C., Timm, F. A., Liu, Y., Gray, W., & Zhou, F. (2014) · Frontiers in Genetics · doi:10.3389/fgene.2014.00173 · Cited by 16 · see citing works
Comparison of Ultra-Conserved Elements in Drosophilids and Vertebrates
Makunin, I. V., Shloma, V. V., Stephen, S. J., Pheasant, M., & Belyakin, S. N. (2013) · PLoS ONE · doi:10.1371/journal.pone.0082362 · Cited by 15 · see citing works
“Indeed, an SNP in an ultraconserved regulatory sequence is linked with Dlx5/Dlx6 expression in the forebrain [34].”
BackgroundAouci, R., Soudany, M. E., Maakoul, Z., Fontaine, A., Kurihara, H., Levi, G., & Narboux‐Nême, N. (2022) · Cells · doi:10.3390/cells11111739 · Cited by 14 · see citing works
Meng, Y., He, Y., Zhang, J., Xie, Q., Yang, M., Chen, Y., & Wu, Y. (2019) · Medicine · doi:10.1097/md.0000000000016716 · Cited by 14 · see citing works
“As a signal-induced transcription, TFII-I can not only regulate transcription,([8]) signal transduction and development of bone, neural tissue,([9]) but also participate in the process of immune regulation.”
BackgroundSumiyama, K., & Tanave, A. (2020) · Development, Growth and Differentiation · doi:10.1111/dgd.12671 · Cited by 11 · see citing works
“This intergenic region also includes I56ii, which is not a branchial arch enhancer but is active in the developing forebrain and in the specific GABAergic interneurons (Ghanem et al., 2003, Poitras et al., 2010) (Figure 2a, 3b).”
BackgroundIncreased Sociability in Mice Lacking Intergenic Dlx Enhancers
Darbandi, S. F., Esau, C., Lesage‐Pelletier, C., Monis, S., Poitras, L., Yu, M., Perin, S., Hatch, G., & Ekker, M. (2021) · Frontiers in Neuroscience · doi:10.3389/fnins.2021.718948 · Cited by 12 · see citing works
“Our biochemical analysis of I56i (Poitras et al., 2010) identified factors that bind to the region of I56i where the SNP was found.”
BackgroundMethodInfluentialEvolution of General Transcription Factors
Владимирович, Г. К., & Ruvinsky, A. O. (2012) · Journal of Molecular Evolution · doi:10.1007/s00239-012-9535-y · Cited by 11 · see citing works
“…of immunoglobulin heavy-chain gene (Ren et al. 2011), beta-globin gene (Crusselle-Davis et al. 2007), Dlx5/Dlx6 genes in the forebrain (Poitras et al. 2010), troponin I (Tay et al. 2003), some HIV-1 genes (Malcolm et al. 2007, 2008), Rous sarcoma virus genes (Mobley and Sealy 2000),…”
BackgroundBayraktar, R., Tang, Y., Dragomir, M. P., Ivan, C., Peng, X., Fabris, L., Zhang, J., Carugo, A., Aneli, S., Liu, J., et al. (2025) · Science Advances · doi:10.1126/sciadv.ado2830 · Cited by 10 · see citing works
“Subsequently, a few UCE sequence variations were reported to be associated with human diseases ( 22 – 24 ).”
Proudfoot, A., Axelrod, H. L., Geralt, M., Fletterick, R. J., Yumoto, F., Deacon, A. M., Elsliger, M., Wilson, I. A., Kurt Wüthrich, A., & Serrano, P. (2016) · Journal of Molecular Biology · doi:10.1016/j.jmb.2016.01.023 · Cited by 10 · see citing works
“A 21 bp DNA sequence, AAATGCAGCCATAATTAGAGT, had previously been identified to target expression of the Dlx5/Dlx6 bi-gene cluster to the developing forebrain in mice [24].”
Early developmental gene enhancers affect subcortical volumes in the adult human brain
Becker, M., Guadalupe, T. M., Franke, B., Hibar, D. P., Rentería, M. E., Stein, J. L., Thompson, P. M., Francks, C., Vernes, S. C., & Fisher, S. E. (2016) · Human Brain Mapping · doi:10.1002/hbm.23136 · Cited by 9 · see citing works
“For example, a rare variant implicated in autism was found in an enhancer that is active during forebrain development [Poitras et al., 2010].”
BackgroundTranscription factor TFII-I fine tunes innate properties of B lymphocytes
Singh, A., Kaileh, M., De, S., Mazan-Mamczarz, K., Bayarsaihan, D., Sen, R., & Roy, A. L. (2023) · Frontiers in Immunology · doi:10.3389/fimmu.2023.1067459 · Cited by 8 · see citing works
“Given that TFII-I has been implicated in regulating homeotic genes like Dlx5 and Dlx6 (45) our observation that loss of TFII-I results in the open chromatin of homeobox containing motifs (Fig 5C) also suggests that regulation of homeobox genes in B cell function could be an important role of TFII-I.”
BackgroundAouci, R., Fontaine, A., Vion, A., Belz, L., Levi, G., & Narboux‐Nême, N. (2024) · Cells · doi:10.3390/cells13151262 · Cited by 7 · see citing works
“Patients carrying mutations in the DLX5/6 brain-specific enhancers, which include the I56i , I56ii and MEF2 [55,56], present a higher incidence of ASD and speech delay [11,57–59].”
BackgroundShirai, Y., Li, W., & Suzuki, T. (2017) · International Journal of Molecular Sciences · doi:10.3390/ijms18020411 · Cited by 7 · see citing works
“These mutations may alter the binding properties of this element to GTF2I and DLX2, which would impair the transcriptional activation of I56i [47].”
BackgroundInfluentialSchanze, D., Ekici, A. B., Pfuhlmann, B., Reis, A., & Stöber, G. (2011) · American Journal of Medical Genetics Part B Neuropsychiatric Genetics · doi:10.1002/ajmg.b.32004 · Cited by 6 · see citing works
Shirai, Y., Watanabe, M., Sakagami, H., & Suzuki, T. (2015) · Journal of Neurochemistry · doi:10.1111/jnc.13136 · Cited by 5 · see citing works
“Gtf2i regulates, via binding to the enhancer region, the expression of the Dlx homeobox gene (Poitras et al. 2010) that is involved in the differentiation and migration of GABA-expressing neurons in the forebrain.”
BackgroundLiu, A., Wang, N., Xie, G., Li, Y., Yan, X., Li, X., Zhu, Z., Li, Z., Yang, J., Meng, F., et al. (2023) · Genome Research · doi:10.1101/gr.277784.123 · Cited by 5 · see citing works
“UCEs have also been found to encompass various functions, including enhancer, promoter, splicing, and repressive activities (Pennacchio et al. 2006; Poitras et al. 2010; Snetkova et al. 2022).”
Fleck, K., Luria, V., Garag, N., Karger, A., Hunter, T., Marten, D., Phu, W., Nam, K.-M., Šestan, N., O’Donnell‐Luria, A., et al. (2024) · bioRxiv (Cold Spring Harbor Laboratory) · doi:10.1101/2024.03.17.585403 · Cited by 5 · see citing works
Srinath, S., Kalal, A. A., Anand, P., Mohapatra, S., & Chakraborty, P. (2025) · International Journal of Developmental Neuroscience · doi:10.1002/jdn.70016 · Cited by 4 · see citing works
“…Caps2/Cadps2 model of ASD (Sadakata et al. 2013), studied the role of SNPs in K+ channels in the valproic acid model of autism (Sun et al. 2021), and an SNP in the Dlx5/Dlx6 homeobox domain affects cortical neuronal migration and reduced inhibition in the somatosensory cortex (Poitras et al. 2010).”
Increased expression levels of DLX5 inhibit the development of the nervous system
Liao, T., Xu, X., Wu, J., Xie, Y., & Yan, J. (2023) · International Journal of Developmental Neuroscience · doi:10.1002/jdn.10300 · Cited by 3 · see citing works
“The abnormal development of GABAergic interneurons is associated with a variety of neurodevelopmental disorders, including epilepsy, schizophrenia, Rett syndrome, and autism (Poitras et al., 2010).”
BackgroundLearning about mammalian gene regulation from functional enhancer assays in the mouse
Nord, A. S. (2015) · Genomics · doi:10.1016/j.ygeno.2015.06.008 · Cited by 3 · see citing works
McCole, R. B., Saylor, W., Redin, C. E., Fonseka, C. Y., Brand, H., Erceg, J., Talkowski, M. E., & Wu, C.-T. (2017) · bioRxiv (Cold Spring Harbor Laboratory) · doi:10.1101/233197 · Cited by 3 · see citing works
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Ultraconserved Elements ( UCEs ) in the Human Genome
Lee, A., & Venkatesh, B. (2013) · Encyclopedia of Life Sciences · doi:10.1002/9780470015902.a0020842.pub2 · Cited by 1 · see citing works
Functional Analysis of Dlx Intergenic Enhancers in the Developing Mouse Forebrain
Darbandi, S. F. (2014) · uO Research (University of Ottawa) · doi:10.20381/ruor-3734 · Cited by 1 · see citing works
Noncoding Elements: Evolution and Epigenetic Regulation
Seridi, L. (2016) · King Abdullah University of Science and Technology Repository (King Abdullah University of Science and Technology) · doi:10.25781/kaust-v431p
TrkB-dependent antidepressants action involves Dlx5/6 inhibition in cortical GABAergic neurons.Preprint
Narboux‐Nême, N., Aouci, R., Fontaine, A., Vion, A., Levi, G., & Belz, L. (2024) · Research Square · doi:10.21203/rs.3.rs-4188176/v1
Identification of GTF2I Polymorphisms as Potential Biomarkers for CKD in the Han Chinese Population
Lu, K., Chiu, K., Chen, I., & Lin, G. (2024) · Kidney360 · doi:10.34067/kid.0000000000000517
Hasenpusch‐Theil, K., Lesayová, A., Kozić, Z., Beltrán, M., Wilson, G., Henderson, N. C., Dando, O., & Theil, T. (2026) · Molecular Psychiatry · doi:10.1038/s41380-026-03615-2
Epigenetic processes in neurodevelopmental disorders
Ventura, E., & Sessa, A. (2026) · Handbook of clinical neurology · doi:10.1016/b978-0-443-19043-8.00003-7
- 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
- ORCID
- Venue
- Development
- Publisher
- The Company of Biologists
- Published
- 2010-09-15
- Volume
- 137
- Issue
- 18
- Pages
- 3089-3097
- ISSN
- 0950-1991 (ISSN-L)
- 1477-9129
- PMC
- PMC3188590
- 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
- green
- www.ncbi.nlm.nih.gov
- 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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