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Pavlenkova Z, Varga L, Borecka S, Karhanek M, Huckova M, Skopkova M, Profant M, Gasperikova D. Comprehensive molecular-genetic analysis of mid-frequency sensorineural hearing loss. Sci Rep 2021; 11:22488. [PMID: 34795337 PMCID: PMC8602250 DOI: 10.1038/s41598-021-01876-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Accepted: 10/27/2021] [Indexed: 12/14/2022] Open
Abstract
The genetic heterogeneity of sensorineural hearing loss (SNHL) is a major hurdle to the detection of disease-causing variants. We aimed to identify underlying causal genes associated with mid-frequency hearing loss (HL), which contributes to less than about 1% of SNHL cases, by whole exome sequencing (WES). Thirty families segregating mid-frequency SNHL, in whom biallelic GJB2 mutations had been previously excluded, were selected from among 851 families in our DNA repository of SNHL. DNA samples from the probands were subjected to WES analysis and searched for candidate variants associated with SNHL. We were able to identify the genetic aetiology in six probands (20%). In total, we found three pathogenic and three likely pathogenic variants in four genes (COL4A5, OTOGL, TECTA, TMPRSS3). One more proband was a compound heterozygote for a pathogenic variant and a variant of uncertain significance (VUS) in MYO15A gene. To date, MYO15A and TMPRSS3 have not yet been described in association with mid-frequency SNHL. In eight additional probands, eight candidate VUS variants were detected in five genes (DIAPH1, MYO7A, TECTA, TMC1, TSPEAR). Seven of these 16 variants have not yet been published or mentioned in the available databases. The most prevalent gene was TECTA, identified in 23% of all tested families. Furthermore, we confirmed the hypothesis that a substantive portion of cases with this conspicuous audiogram shape is a consequence of a genetic disorder.
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Affiliation(s)
- Zuzana Pavlenkova
- Department of Otorhinolaryngology-Head and Neck Surgery, Faculty of Medicine and University Hospital, Comenius University, Bratislava, Slovakia.,DIABGENE Laboratory, Biomedical Research Center, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Lukas Varga
- Department of Otorhinolaryngology-Head and Neck Surgery, Faculty of Medicine and University Hospital, Comenius University, Bratislava, Slovakia. .,DIABGENE Laboratory, Biomedical Research Center, Slovak Academy of Sciences, Bratislava, Slovakia.
| | - Silvia Borecka
- DIABGENE Laboratory, Biomedical Research Center, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Miloslav Karhanek
- Laboratory of Bioinformatics, Biomedical Research Center, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Miloslava Huckova
- DIABGENE Laboratory, Biomedical Research Center, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Martina Skopkova
- DIABGENE Laboratory, Biomedical Research Center, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Milan Profant
- Department of Otorhinolaryngology-Head and Neck Surgery, Faculty of Medicine and University Hospital, Comenius University, Bratislava, Slovakia
| | - Daniela Gasperikova
- DIABGENE Laboratory, Biomedical Research Center, Slovak Academy of Sciences, Bratislava, Slovakia
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