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dc.contributor.authorMattiske, T.en
dc.contributor.authorLee, K.en
dc.contributor.authorGecz, J.en
dc.contributor.authorFriocourt, G.en
dc.contributor.authorShoubridge, C.en
dc.identifier.citationHuman Molecular Genetics, 2016; 25(24):5433-5443en
dc.description.abstractThe Aristaless-related homeobox (ARX) gene encodes a paired-type homeodomain transcription factor with critical roles in embryonic development. Mutations in ARX give rise to intellectual disability (ID), epilepsy and brain malformation syndromes. To capture the genetics and molecular disruptions that underpin the ARX-associated clinical phenotypes, we undertook a transcriptome wide RNASeq approach to analyse developing (12.5 dpc) telencephalon of mice modelling two recurrent polyalanine expansion mutations with different phenotypic severities in the ARX gene. Here we report 238 genes significantly deregulated (Log2FC  > +/−1.1, P-value <0.05) when both mutations are compared to wild-type (WT) animals. When each mutation is considered separately, a greater number of genes were deregulated in the severe PA1 mice (825) than in the PA2 animals (78). Analysing genes deregulated in either or both mutant strains, we identified 12% as implicated in ID, epilepsy and autism (99/858), with ∼5% of them as putative or known direct targets of ARX transcriptional regulation. We propose a core pathway of transcription regulators, including Hdac4, involved in chromatin condensation and transcriptional repression, and one of its targets, the transcription factor Twist1, as potential drivers of the ID and infantile spasms in patients with ARX polyalanine expansion mutations. We predict that the subsequent disturbance to this pathway is a consequence of ARX protein reduction with a broader and more significant level of disruption in the PA1 in comparison to the PA2 mice. Identifying early triggers of ARX-associated phenotypes contributes to our understanding of particular clusters/pathways underpinning comorbid phenotypes that are shared by many neurodevelopmental disorders.en
dc.description.statementofresponsibilityTessa Mattiske, Kristie Lee, Jozef Gecz, Gaelle Friocourt, and Cheryl Shoubridgeen
dc.publisherOxford University Pressen
dc.rights© The Author 2016. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oup.comen
dc.subjectphenotype; epilepsy; mutation; embryo; genes; homeobox; intellectual disability; precipitating factors; prosencephalon; telencephalon; mice; transcription factor; embryologic development; twist-related protein 1en
dc.titleEmbryonic forebrain transcriptome of mice with polyalanine expansion mutations in the ARX homeobox geneen
dc.typeJournal articleen
pubs.library.collectionMedicine publicationsen
dc.identifier.orcidMattiske, T. [0000-0002-9581-5370]en
dc.identifier.orcidGecz, J. [0000-0002-7884-6861]en
dc.identifier.orcidShoubridge, C. [0000-0002-0157-3084]en
Appears in Collections:Medicine publications

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