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BMC Medical Genetics
Published in: BMC Medical Genetics 1/2013

Open Access 01-12-2013 | Research article

OTOF mutation screening in Japanese severe to profound recessive hearing loss patients

Authors: Yoh-ichiro Iwasa, Shin-ya Nishio, Hidekane Yoshimura, Yukihiko Kanda, Kozo Kumakawa, Satoko Abe, Yasushi Naito, Kyoko Nagai, Shin-ichi Usami

Published in: BMC Medical Genetics | Issue 1/2013

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Abstract

Background

Auditory neuropathy spectrum disorder (ANSD) is a unique form of hearing loss that involves absence or severe abnormality of auditory brainstem response (ABR), but also the presence of otoacoustic emissions (OAEs). However, with age, the OAEs disappear, making it difficult to distinguish this condition from other nonsyndromic hearing loss. Therefore, the frequency of ANSD may be underestimated. The aim of this study was to determine what portion of nonsyndromic hearing loss is caused by mutations of OTOF, the major responsible gene for nonsyndromic ANSD.

Methods

We screened 160 unrelated Japanese with severe to profound recessive nonsyndromic hearing loss (ARNSHL) without GJB2 or SLC26A4 mutations, and 192 controls with normal hearing.

Results

We identified five pathogenic OTOF mutations (p.D398E, p.Y474X, p.N727S, p.R1856Q and p.R1939Q) and six novel, possibly pathogenic variants (p.D450E, p.W717X, p.S1368X, p.R1583H, p.V1778I, and p.E1803A).

Conclusions

The present study showed that OTOF mutations accounted for 3.2–7.3% of severe to profound ARNSHL patients in Japan. OTOF mutations are thus a frequent cause in the Japanese deafness population and mutation screening should be considered regardless of the presence/absence of OAEs.
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Metadata
Title
OTOF mutation screening in Japanese severe to profound recessive hearing loss patients
Authors
Yoh-ichiro Iwasa
Shin-ya Nishio
Hidekane Yoshimura
Yukihiko Kanda
Kozo Kumakawa
Satoko Abe
Yasushi Naito
Kyoko Nagai
Shin-ichi Usami
Publication date
01-12-2013
Publisher
BioMed Central
Published in
BMC Medical Genetics / Issue 1/2013
Electronic ISSN: 1471-2350
DOI
https://doi.org/10.1186/1471-2350-14-95

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