Identification of two novel missense WFS1 mutations, H696Y and R703H, in patients with non-syndromic low-frequency sensorineural hearing loss

Yi Sun; Jing Cheng; Yanping Lu; Jianzhong Li; Yu Lu; Zhanguo Jin; Pu Dai; Rongguang Wang; Huijun Yuan

doi:10.1016/j.jcg.2011.01.001

Volume 38 Issue 2

Feb. 2011

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Identification of two novel missense WFS1 mutations, H696Y and R703H, in patients with non-syndromic low-frequency sensorineural hearing loss

doi: 10.1016/j.jcg.2011.01.001

Yi Sun^{a, b, #},
Jing Cheng^{a, #},
Yanping Lu^{c, #},
Jianzhong Li^{a, d},
Yu Lu^a,
Zhanguo Jin^a,
Pu Dai^a,
Rongguang Wang^a,
Huijun Yuan^a

a
Institute of Otolaryngology, Chinese PLA General Hospital, Beijing 100853, China
b
Department of Otolaryngology, Chinese PLA Wuhan General Hospital of Guangzhou Military Command, Wuhan 430070, China
c
Department of Obstetrics and Gynecology, Chinese PLA General Hospital, Beijing 100853, China
d
Fuzhou General Hospital of Nanjing Military Command PLA, Fuzhou 350025, China

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Corresponding author: E-mail address: daipu301@sina.vip.com (Pu Dai); E-mail address: wangrongguang@yeah.net (Rongguang Wang); E-mail address: yuanhj301@yahoo.com.cn (Huijun Yuan)
Received Date: 2010-08-02
Accepted Date: 2010-12-07
Rev Recd Date: 2010-11-26

Available Online: 2011-02-08

Publish Date: 2011-02-20

Abstract

Abstract

Non-syndromic low-frequency sensorineural hearing loss (LFSNHL) is an unusual type of hearing loss in which frequencies ≤2000 Hz predominantly are affected. To date, different mutations in two genes, DIAPH1 and WFS1, have been found to be associated with LFSNHL. Here, we report a five-generation Chinese family with postlingual and progressive LFSNHL. We mapped the disease locus to a 2.5 Mb region on chromosome 4p16 between markers SNP_A-2167174 and D4S431, overlapping with the DFNA6/14/38 locus. Sequencing of candidate gene revealed a heterozygous c.2086C>T substitution in exon 8 ofWFS1, leading to p.H696Y substitution at the C-terminus of Wolframin (WFS1). In addition, we performed mutational screening of WFS1 in 37 sporadic patients, 7–50 years of age, with LFSNHL. We detected a heterozygous c.2108G>A substitution in exon 8 ofWFS1, leading to p.R703H substitution in a patient. The H696 and R703 in WFS1 are highly conserved across species, including human, orangutan, rat, mouse, and frog (Xenopus). Sequence analysis demonstrated the absence of c.2086C>T or c.2108G>A substitutions in theWFS1 genes among 200 unrelated control subjects of Chinese background, supporting the hypothesis that they represent causative mutations, and not rare polymorphisms. Our data provide additional molecular and clinical information for establishing a better genotype–phenotype correlation for LFSNHL.
- DFNA6/14/38,
- WFS1,
- Mutation,
- Low-frequency hearing loss

These authors contributed equally to this work.

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References(14)

References

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