Heterogeneity of MYO15A variants significantly determine the feasibility of acoustic stimulation with hearing aid and cochlear implant

Gina Na, Hye Ji Choi, Sun Young Joo, John Hoon Rim, Jung Ah Kim, Hye Youn Kim, Seyoung Yu, Yeonsu Jeong, Geun Cheol Shin, Hae Eun Noh, Ho Young Lee, Da Hye Kim, Heon Yung Gee, Jinsei Jung, Jae Young Choi

Research output: Contribution to journalArticlepeer-review

Abstract

Autosomal recessive nonsyndromic hearing loss 3 (DFNB3) mainly leads to congenital and severe-to-profound hearing impairment, which is caused by variants in MYO15A. However, audiological heterogeneity in patients with DFNB3 hinders precision medicine in hearing rehabilitation. Here, we aimed to elucidate the heterogeneity of the auditory phenotypes of MYO15A variants according to the affected domain and the feasibilities for acoustic stimulation. We conducted whole-exome sequencing for 10 unrelated individuals from seven multiplex families with DFNB3; 11 MYO15A variants, including the novel frameshift c.900delT (p.Pro301Argfs*143) and nonsense c.4879G > T (p.Glu1627*) variants, were identified. In seven probands, residual hearing at low frequencies was significantly higher in the groups with one or two N-terminal frameshift variants in trans conformation compared to that in the group without these variants. This is consistent with the 56 individuals from the previously published reports that carried a varying number of N-terminal truncating variants in MYO15A. In addition, patients with missense variants in the second FERM domain had better hearing at low frequencies than patients without these variants. Subsequently, acoustic stimulation provided by devices such as hearing aids or cochlear implants was feasible in patients with one or two N-terminal truncating variants or a second FERM missense variant. In conclusion, N-terminal or second FERM variants in MYO15A allow the practical use of acoustic stimulation through hearing aids or electroacoustic stimulation for aural rehabilitation.

Original languageEnglish
Article number108227
JournalHearing Research
Volume404
DOIs
Publication statusPublished - 2021 May

Bibliographical note

Funding Information:
This work was supported by the Basic Science Research Program of the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning [grant number 2019R1A2C1084033 to J.J.S., and 2020R1A2C3005787 to C.J.Y.].

Publisher Copyright:
© 2021

All Science Journal Classification (ASJC) codes

  • Sensory Systems

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