Journal
FRONTIERS IN GENETICS
Volume 13, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fgene.2022.1047230
Keywords
non-syndromic unilateral hearing loss; SIX1 gene; whole exome sequencing; genetic counseling; novel mutation
Categories
Funding
- National Natural Science Foundation of China
- National Key Research and Development Program [30972610, 81273240]
- Jilin Province Science and Technology Agency [2017YFC0910000, 2017YFD0501300]
- [JJKH20211210KJ]
- [JJKH20211164KJ]
- [20200403084SF]
- [JLSWSRCZX 2020-009]
- [20200901025SF]
- [20190101022JH]
- [2019J026]
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This study identified a novel mutation in the SIX1 gene that is associated with NS-UHL in a three-generation Chinese family. Bioinformatics analysis confirmed the pathogenicity of this mutation and its impact on the structure of the SIX1 protein.
Familial non-syndromic unilateral hearing loss (NS-UHL) is rare and its genetic etiology has not been clearly elucidated. This study aimed to identify the genetic cause of NS-UHL in a three-generation Chinese family. Detailed medical history consultation and clinical examination were conducted. Further, whole-exome sequencing (WES) was performed to identify the genetic etiology of the proband, and the variant was verified by Sanger sequencing. A novel missense mutation, c.533G > C (p.Arg178Thr), in the SIX homeobox 1 gene (SIX1) was identified in four patients and co-segregated with NS-UHL in a three-generation Chinese family as a dominant trait. Using bioinformatics analyses, we show that this novel mutation is pathogenic and affects the structure of SIX1 protein. These data suggest that mutations in SIX1 gene are associated with NS-UHL. Our study added the NS-UHL phenotype associated with SIX1, and thereby improving the genetic counseling provided to individuals with SIX1 mutations.
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