Publication: MITF variants cause nonsyndromic sensorineural hearing loss with autosomal recessive inheritance
Issued Date
2020-12-01
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ISSN
20452322
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2-s2.0-85088705167
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Mahidol University
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SCOPUS
Bibliographic Citation
Scientific Reports. Vol.10, No.1 (2020)
Suggested Citation
Supranee Thongpradit, Natini Jinawath, Asif Javed, Saisuda Noojarern, Arthaporn Khongkraparn, Thipwimol Tim-Aroon, Krisna Lertsukprasert, Bhoom Suktitipat, Laran T. Jensen, Duangrurdee Wattanasirichaigoon MITF variants cause nonsyndromic sensorineural hearing loss with autosomal recessive inheritance. Scientific Reports. Vol.10, No.1 (2020). doi:10.1038/s41598-020-69633-4 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/58406
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Title
MITF variants cause nonsyndromic sensorineural hearing loss with autosomal recessive inheritance
Abstract
© 2020, The Author(s). MITF is a known gene underlying autosomal dominant hearing loss, Waardenburg syndrome (WS). Biallelic MITF mutations have been found associated with a rare hearing loss syndrome consisting eye abnormalities and albinism; and a more severe type of WS whose heterozygous parents were affected with classic WS in both cases. The aims of this study were to identify a new candidate gene causing autosomal recessive nonsyndromic hearing loss (ARNSHL) and confirm its causation by finding additional families affected with the candidate gene and supporting evidences from functional analyses. By using whole exome sequencing, we identified a homozygous c.1022G>A: p.Arg341His variant of MITF, which co-segregated with the hearing loss in five affected children of a consanguineous hearing couple. Targeted exome sequencing in a cohort of 130 NSHL individuals, using our in-house gene panel revealed a second family with c.1021C>T: p.Arg341Cys MITF variant. Functional studies confirmed that the Arg341His and Arg341Cys alleles yielded a normal sized MITF protein, with aberrant cytosolic localization as supported by the molecular model and the reporter assay. In conclusion, we demonstrate MITF as a new cause of ARNSHL, with heterozygous individuals free of symptoms. MITF should be included in clinical testing for NSHL, though it is rare.