國家衛生研究院 NHRI:Item 3990099045/15302
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    Please use this identifier to cite or link to this item: http://ir.nhri.org.tw/handle/3990099045/15302


    Title: Genetic factors contribute to the phenotypic variability in GJB2-related hearing impairment
    Authors: Chiang, YT;Lin, PH;Lo, MY;Chen, HL;Lee, CY;Tsai, CY;Lin, YH;Tsai, SF;Liu, TC;Hsu, CJ;Chen, PL;Shu-Jui Hsu, J;Wu, CC
    Contributors: Institute of Molecular and Genomic Medicine
    Abstract: Recessive variants in GJB2 are the most important genetic cause of sensorineural hearing impairment (SNHI) worldwide. Phenotypes vary significantly in GJB2-related SNHI, even in patients with identical variants. For instance, patients homozygous for the GJB2 p.V37I variant, which is highly prevalent in the Asian populations, usually present with mild-to-moderate SNHI; yet severe-to-profound SNHI is occasionally observed in approximately 10% of p.V37I homozygotes. To investigate the genomic underpinnings of the phenotypic variability, we performed next-generation sequencing of GJB2 and other deafness genes in 63 p.V37I homozygotes with extreme phenotypic severities. We identified additional pathogenic variants of other deafness genes in 5 of the 35 patients with severe-to-profound SNHI. Furthermore, we conducted case-control association analyses for 30 unrelated p.V37I homozygotes with severe-to-profound SNHI against 28 p.V37I homozygotes with mild-to-moderate SNHI, and 120 population controls from the Taiwan Biobank. We found that the severe-to-profound group had a higher frequency of the crystallin lambda 1 (CRYL1) variant (rs14236), located upstream of GJB2, than the mild-to-moderate and Taiwan Biobank groups. Our results demonstrated that pathogenic variants in other deafness genes and a possible modifier, the CRYL1 rs14236 variant, may contribute to phenotypic variability in GJB2-realted SNHI, highlighting the importance of comprehensive genomic surveys to delineate the genotype-phenotype correlations.
    Date: 2023-11
    Relation: Journal of Molecular Diagnostics. 2023 Nov;25(11):827-837.
    Link to: http://dx.doi.org/10.1016/j.jmoldx.2023.07.005
    JIF/Ranking 2023: http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=NHRI&SrcApp=NHRI_IR&KeyISSN=1525-1578&DestApp=IC2JCR
    Cited Times(WOS): https://www.webofscience.com/wos/woscc/full-record/WOS:001105491100001
    Cited Times(Scopus): https://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85173212455
    Appears in Collections:[Shih-Feng Tsai] Periodical Articles

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