Elongated EABR wave latencies observed in patients with auditory neuropathy caused by OTOF mutation

Makoto Hosoya, Shujiro B. Minami, Chieko Enomoto, Tatsuo Matsunaga, Kimitaka Kaga

Research output: Contribution to journalArticle

Abstract

Objectives: We sought to determine how the pathology altered electrically evoked auditory brainstem responses (EABRs) in patients with hearing loss by evaluating EABRs in auditory neuropathy patients with OTOF mutations comparing with various types of congenital deafness. Methods: We included 15 patients with congenital hearing loss, grouped according to pathology: OTOF mutations (n = 4), GJB2 mutations (n = 4), SLC26A4 mutations (n = 4), or cytomegalovirus infections (n = 3). EABRs were recorded when patients underwent cochlear implantation surgery. We evaluated the latencies and amplitudes of the recorded EABRs and compared them statistically between four groups. Results: The EABR latencies of Wave III and Wave V, and of the interval between them, were significantly longer in the OTOF mutation group than in the GJB2 and SLC26A4 mutation groups (Wave III) and in all three other groups (Wave V and Wave III-V latency); amplitudes were not significantly different between groups. Conclusions: Our results suggest OTOF mutations cause delayed (or slowed) postsynaptic neurotransmission, although the presumed mechanism involved reduced presynaptic transmission between hair cells and spiral ganglion neurons. Level of Evidence: Mainly a case report.

Original languageEnglish
Pages (from-to)388-393
Number of pages6
JournalLaryngoscope investigative otolaryngology
Volume3
Issue number5
DOIs
Publication statusPublished - 2018 Oct 1
Externally publishedYes

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Keywords

  • Auditory neuropathy
  • electrically evoked auditory brainstem responses
  • OTOF

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