The genetic basis of DOORS syndrome: an exome-sequencing study

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dc.contributor.authorCampeau, Philippe
dc.contributor.authorKasperaviciute, Dalia
dc.contributor.authorLu, James
dc.contributor.authorBurrage, Lindsay
dc.contributor.authorKim, Choel
dc.contributor.authorHori, Mutsuki
dc.contributor.authorPowell, Berkley
dc.contributor.authorStewart, Fiona
dc.contributor.authorTêmis, Maria Félix,
dc.contributor.authorvan den Ende, Jenneke
dc.contributor.authorWisniewska, Marzena
dc.contributor.authorKayserili, Hülya
dc.contributor.authorRump, Patrick
dc.contributor.authorNampoothiri, Sheela
dc.contributor.authorAftimos, Salim
dc.contributor.authorMey, Antje
dc.contributor.authorNair, Lal
dc.contributor.authorBegleiter, Michael
dc.contributor.authorDe Bie, Isabelle
dc.contributor.authorMeenakshi, Girish
dc.contributor.authorMurray, Mitzi
dc.contributor.authorRepetto, Gabriela
dc.contributor.authorGolabi, Mahin
dc.contributor.authorBlair, Edward
dc.contributor.authorMale, Alison
dc.contributor.authorGiuliano, Fabienne
dc.contributor.authorKariminejad, Ariana
dc.contributor.authorNewmanab, William
dc.contributor.authorBhaskarab, Sanjeev
dc.contributor.authorDickersonab, Jonathan
dc.contributor.authorKerrab, Bronwyn
dc.contributor.authorBankaab, Siddharth
dc.contributor.authorGiltay, Jacques
dc.contributor.authorWieczorek, Dagmar
dc.contributor.authorTostevin, Anna
dc.contributor.authorWiszniewska, Joanna
dc.contributor.authorCheung, Sau Wai
dc.contributor.authorHennekam, Raoul
dc.contributor.authorGibbs, Richard
dc.contributor.authorLee, Brendan
dc.contributor.authorSisodiya, Sanjay
dc.date.accessioned2017-03-13T12:48:40Z
dc.date.available2017-03-13T12:48:40Z
dc.date.issued2014
dc.descriptionCentro de Genética y Genómica
dc.description.abstractAbstract BACKGROUND: Deafness, onychodystrophy, osteodystrophy, mental retardation, and seizures (DOORS) syndrome is a rare autosomal recessive disorder of unknown cause. We aimed to identify the genetic basis of this syndrome by sequencing most coding exons in affected individuals. METHODS: Through a search of available case studies and communication with collaborators, we identified families that included at least one individual with at least three of the five main features of the DOORS syndrome: deafness, onychodystrophy, osteodystrophy, intellectual disability, and seizures. Participants were recruited from 26 centres in 17 countries. Families described in this study were enrolled between Dec 1, 2010, and March 1, 2013. Collaborating physicians enrolling participants obtained clinical information and DNA samples from the affected child and both parents if possible. We did whole-exome sequencing in affected individuals as they were enrolled, until we identified a candidate gene, and Sanger sequencing to confirm mutations. We did expression studies in human fibroblasts from one individual by real-time PCR and western blot analysis, and in mouse tissues by immunohistochemistry and real-time PCR. FINDINGS: 26 families were included in the study. We did exome sequencing in the first 17 enrolled families; we screened for TBC1D24 by Sanger sequencing in subsequent families. We identified TBC1D24 mutations in 11 individuals from nine families (by exome sequencing in seven families, and Sanger sequencing in two families). 18 families had individuals with all five main features of DOORS syndrome, and TBC1D24 mutations were identified in half of these families. The seizure types in individuals with TBC1D24 mutations included generalised tonic-clonic, complex partial, focal clonic, and infantile spasms. Of the 18 individuals with DOORS syndrome from 17 families without TBC1D24 mutations, eight did not have seizures and three did not have deafness. In expression studies, some mutations abrogated TBC1D24 mRNA stability. We also detected Tbc1d24 expression in mouse phalangeal chondrocytes and calvaria, which suggests a role of TBC1D24 in skeletogenesis. INTERPRETATION: Our findings suggest that mutations in TBC1D24 seem to be an important cause of DOORS syndrome and can cause diverse phenotypes. Thus, individuals with DOORS syndrome without deafness and seizures but with the other features should still be screened for TBC1D24 mutations. More information is needed to understand the cellular roles of TBC1D24 and identify the genes responsible for DOORS phenotypes in individuals who do not have a mutation in TBC1D24. FUNDING: US National Institutes of Health, the CIHR (Canada), the NIHR (UK), the Wellcome Trust, the Henry Smith Charity, and Action Medical Research.
dc.format.extent15
dc.identifier.citationLancet Neurol. 2014 Jan;13(1):44-58
dc.identifier.urihttp://hdl.handle.net/11447/1012
dc.language.isoen_US
dc.publisherElsevier
dc.subjectCarrier proteins, genetics
dc.subjectCraniofacial abnormalities, genetics
dc.subjectExome, genetics
dc.subjectHand demormities congenital, genetics
dc.subjectintellectual disability, genetics
dc.titleThe genetic basis of DOORS syndrome: an exome-sequencing study
dc.typeArtículo

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