Mitochondrial COI/tRNASer(UCN) G7444A mutation may be associated with aminoglycoside-induced and non-syndromic hearing impairment

Liu,Qi; Liu,Ping; Ding,Yu; Dong,Xue‑Jun; Wang,Zong‑Xin; Qian,Yan‑Er; Wang,Qing; Yang,Guo‑Can

doi:10.3892/mmr.2015.4484

Mitochondrial COI/tRNASer(UCN) G7444A mutation may be associated with aminoglycoside-induced and non-syndromic hearing impairment

Authors:
- Qi Liu
- Ping Liu
- Yu Ding
- Xue‑Jun Dong
- Zong‑Xin Wang
- Yan‑Er Qian
- Qing Wang
- Guo‑Can Yang
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Affiliations: Department of Clinical Laboratory Center, Shaoxing People's Hospital, Shaoxing Hospital of Zhejiang University, Shaoxing, Zhejiang 312000, P.R. China, Central Laboratory, Hangzhou First People's Hospital, Hangzhou, Zhejiang 310006, P.R. China
Published online on: October 26, 2015 https://doi.org/10.3892/mmr.2015.4484
Pages: 8176-8178

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Abstract

Mutations in mitochondrial DNA (mtDNA) have been reported to have important roles in aminoglycoside-induced hearing impairment; however, the underlying molecular mechanisms have remained largely elusive. The current study presented a case of a Chinese patient with maternally inherited aminoglycoside-induced hearing impairment. A profound hearing impairment was identified by clinical evaluation; furthermore, analysis of the mitochondrial genome sequence of the patient revealed the presence of an A1555G mutation in the 12S rRNA as well as a G7444A mutation in the COI/tRNASer(UCN) gene. As the G7444A mutation is highly conserved between various species, it may be a modifying factor with regard to the pathological effects of the A1555G mutation.

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