Abstract
Backgound
Hereditary hearing loss is one of the most common genetically heterogeneous defects in human. About 70% of hereditary hearing loss is defined as non-syndromic hearing loss showing loss of hearing ability without any other symptoms. Up to date, the identified genes associated with non-syndromic hearing loss are 128, including 52 genes for DFNA and 76 genes for DFNB. Because of high levels of heterogeneity, it is difficult to identify the causative factors for hearing loss using Sanger sequencing.
Objective
Our aim was to detect causative factors and investigate pathogenic mutations, which co-segregates within the candidate family.
Methods
We used Next Generation Sequencing technique to investigate whole-exome sequences of a Korean family with non-syndromic hereditary hearing loss. The family showed autosomal dominant inheritance pattern.
Results
We identified a novel missense variation, c.1978G > A in MYO7A gene, in the family with the autosomal dominant inheritance pattern. c.1978G > A produced Gly660Arg in the motor head domain of Myosin VIIA disrupt the ATP- and actin-binding motif function.
Conclusion
This study is the first to report pathogenic mutations within MYO7A gene in Korean family and our data would facilitate diagnosing the primary cause of hereditary hearing loss in Korean.
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Acknowledgements
We appreciate the families for participating in the genetic study. This research was supported by Kyungpook National University Development Project Research Fund, 2018.
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Kim, YR., Kim, HM., Lee, B. et al. Identification of novel missense mutation related with non-syndromic sensorineural deafness, DFNA11 in korean family by NGS. Genes Genom 45, 225–230 (2023). https://doi.org/10.1007/s13258-022-01357-3
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DOI: https://doi.org/10.1007/s13258-022-01357-3