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    Recurrent missense mutations in TMEM43 (ARVD5) due to founder effects cause arrhythmogenic cardiomyopathies in the UK and Canada

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    Type
    Article
    Authors
    Haywood, Annika
    Merner, Nancy D.
    Hodgkinson, Kathy A.
    Houston, Jim
    Syrris, Petros
    Booth, Valerie
    Connors, Sean
    Pantazis, Antonios
    Quarta, Giovanni
    Elliott, Perry
    McKenna, William
    Young, Terry Lynn
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Computational Bioscience Research Center (CBRC)
    Date
    2012-11-15
    Online Publication Date
    2012-11-15
    Print Publication Date
    2013-04-01
    Permanent link to this record
    http://hdl.handle.net/10754/594089
    
    Metadata
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    Abstract
    AimsAutosomal dominant arrhythmogenic right ventricular cardiomyopathy/dysplasia (ARVC/D) (in the group of arrhythmogenic cardiomyopathies) is a common cause of sudden cardiac death in young adults. It is both clinically and genetically heterogeneous, with 12 loci (ARVC/D1-12) and eight genes identified, the majority of which encode structural proteins of cardiac desmosomes. The most recent gene identified, TMEM43, causes disease due to a missense mutation in a non-desmosomal gene (p.S358L) in 15 extended families from Newfoundland, Canada. To determine whether mutations in TMEM43 cause ARVC/D and arrhythmogenic cardiomyopathy in other populations, we fully re-sequenced TMEM43 on 143 ARVC/D probands (families) from the UK and 55 probands (from 55 families) from Newfoundland.Methods and resultsBidirectional sequencing of TMEM43 including intron-exon boundaries revealed 33 variants, the majority located in non-coding regions of TMEM43. For the purpose of validation, families of probands with rare, potentially deleterious coding variants were subjected to clinical and molecular follow-up. Three missense variants of uncertain significance (p.R28W, p.E142K, p.R312W) were located in highly conserved regions of the TMEM43 protein. One variant (p.R312W) also co-segregated with relatives showing clinical signs of disease. Genotyping and expansion of the disease-associated haplotype in subjects with the p.R312W variant from Newfoundland, Canada, and the UK suggest common ancestry.ConclusionAlthough the p.R312W variant was found in controls (3/378), identification of an ancestral disease p R312W haplotype suggests that the p.R312W variant is a pathogenic founder mutation. © 2012 The Author.
    Citation
    Haywood AFM, Merner ND, Hodgkinson KA, Houston J, Syrris P, et al. (2012) Recurrent missense mutations in TMEM43 (ARVD5) due to founder effects cause arrhythmogenic cardiomyopathies in the UK and Canada. European Heart Journal 34: 1002–1011. Available: http://dx.doi.org/10.1093/eurheartj/ehs383.
    Sponsors
    This work was supported by a Genome Canada Competition III award [Atlantic Medical Genetics and Genomics Initiative (AMGGI)]; the Canadian Foundation for Innovation [New Opportunities Award (9384); Leaders Opportunity Award (13120)]; and Memorial University. Part of this work conducted in the UK was undertaken at UCLH/UCL, which received support from the Department of Health's National Institute of Health Research Biomedical Research Centres funding scheme. Dr. T.-L.Y. is supported by a Canadian Institutes of Health Research-Regional Partnerships Award salary award.
    Publisher
    Oxford University Press (OUP)
    Journal
    European Heart Journal
    DOI
    10.1093/eurheartj/ehs383
    PubMed ID
    23161701
    ae974a485f413a2113503eed53cd6c53
    10.1093/eurheartj/ehs383
    Scopus Count
    Collections
    Articles; Biological and Environmental Science and Engineering (BESE) Division; Computational Bioscience Research Center (CBRC)

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