Abstract:
:Mutation of SLC26A4 is the most common cause of prelingual hearing loss in East Asia. Patients with SLC26A4 mutations have variable phenotypes ranging from non-syndromic hearing loss to Pendred syndrome. Here, we analyzed the correlation between genotype and various inner ear phenotypes and found a possible underlying mechanism. This study included 111 patients with bi-allelic SLC26A4 mutations who had bilateral enlarged vestibular aqueduct (EVA) and hearing loss. p.H723R (61%), c.919-2A>G (24%), and p.T410M (4%) were the most common mutations in Korean patients with EVAs. Residual hearing in patients with c.919-2A>G or p.T410M mutations was better than that of patients with p.H723R homozygous mutations. Interestingly, quantitative polymerase chain reaction showed normal pendrin transcript (6-17% of normal levels) was produced from patients with c.919-2A>G homozygous mutations. Surface expression ratio of pendrin and residual anion exchange activity were higher in cells transfected with p.T410M in comparison to cells transfected with p.H723R. These results suggest that there is a correlation between degree of residual hearing and the SLC26A4 genotype commonly found in the East Asian population.
journal_name
Clin Genetjournal_title
Clinical geneticsauthors
Lee HJ,Jung J,Shin JW,Song MH,Kim SH,Lee JH,Lee KA,Shin S,Kim UK,Bok J,Lee KY,Choi JY,Park HJdoi
10.1111/cge.12273subject
Has Abstractpub_date
2014-09-01 00:00:00pages
270-5issue
3eissn
0009-9163issn
1399-0004journal_volume
86pub_type
杂志文章abstract::A slowly progressive type of muscular dystrophy affecting 11 known members of several Southern Manitoba Hutterite colonies is described. Though encompassing the facial characteristics of the facio-scapulo-humeral type and the proximal distribution of the limb-girdle type, it was felt that this disease represents a dis...
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