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    Global genetic insight contributed by consanguineous Pakistani families segregating hearing loss

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    Author
    Richard, E.M.
    Santos-Cortez, R.L.P.
    Faridi, R.
    Date
    2019
    Journal
    Human Mutation
    Publisher
    John Wiley and Sons Inc.
    Type
    Article
    
    Metadata
    Show full item record
    See at
    https://dx.doi.org/10.1002/humu.23666
    Abstract
    Consanguineous Pakistani pedigrees segregating deafness have contributed decisively to the discovery of 31 of the 68 genes associated with nonsyndromic autosomal recessive hearing loss (HL) worldwide. In this study, we utilized genome-wide genotyping, Sanger and exome sequencing to identify 163 DNA variants in 41 previously reported HL genes segregating in 321 Pakistani families. Of these, 70 (42.9%) variants identified in 29 genes are novel. As expected from genetic studies of disorders segregating in consanguineous families, the majority of affected individuals (94.4%) are homozygous for HL-associated variants, with the other variants being compound heterozygotes. The five most common HL genes in the Pakistani population are SLC26A4, MYO7A, GJB2, CIB2 and HGF, respectively. Our study provides a profile of the genetic etiology of HL in Pakistani families, which will allow for the development of more efficient genetic diagnostic tools, aid in accurate genetic counseling, and guide application of future gene-based therapies. These findings are also valuable in interpreting pathogenicity of variants that are potentially associated with HL in individuals of all ancestries. The Pakistani population, and its infrastructure for studying human genetics, will continue to be valuable to gene discovery for HL and other inherited disorders. © 2018 Wiley Periodicals, Inc.
    Sponsors
    The authors would like to thank all the families for participating in the study. The authors thank A. M. Waryah, R. Yousaf, and S. Yousaf for their technical help. The authors also would like to thank the University of Washington Center for Mendelian Genomics. NIDCD/NIH extramural research grants (R56 DC011803 to S.R., R01 DC011651 to S.M.L, R01 DC003594 to S.M.L, R01 DC012564 to Z.M.A); and in part from Intramural Research Program of the National Institute on Deafness and Other Communication Disorders at the NIH (DC000039-20 to T.B.F. and DC000086 to R.J.M.); and Higher Education Commission of Pakistan (HEC). Genotyping and exome sequencing performed at the UWCMG was funded by the National Human Genome Research Institute and the National Heart, Lung and Blood Institute grant HG006493 (to D.A.N., M.J.B., and S.M.L.).
    Keyword
    allelic heterogeneity
    autosomal recessive hearing loss
    DFNB
    genetic spectrum
    pathogenic variant
    Deafness
    Pakistan
    Identifier to cite or link to this item
    https://www.scopus.com/inward/record.uri?eid=2-s2.0-85056725877&doi=10.1002%2fhumu.23666&partnerID=40&md5=c7c7e0c28535f8f8de80ff4cf515db58; http://hdl.handle.net/10713/8726
    ae974a485f413a2113503eed53cd6c53
    10.1002/humu.23666
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