Two Iranian families with a novel mutation in GJB2 causing autosomal dominant nonsyndromic hearing loss.
نویسندگان
چکیده
Mutations in GJB2, encoding connexin 26 (Cx26), cause both autosomal dominant and autosomal recessive nonsyndromic hearing loss (ARNSHL) at the DFNA3 and DFNB1 loci, respectively. Most of the over 100 described GJB2 mutations cause ARNSHL. Only a minority has been associated with autosomal dominant hearing loss. In this study, we present two families with autosomal dominant nonsyndromic hearing loss caused by a novel mutation in GJB2 (p.Asp46Asn). Both families were ascertained from the same village in northern Iran consistent with a founder effect. This finding implicates the D46N missense mutation in Cx26 as a common cause of deafness in this part of Iran mandating mutation screening of GJB2 for D46N in all persons with hearing loss who originate from this geographic region.
منابع مشابه
Screening of DFNB3 in Iranian families with autosomal recessive non-syndromic hearing loss reveals a novel pathogenic mutation in the MyTh4 domain of the MYO15A gene in a linked family
Objective(s): Non-syndromic sensorineural hearing loss (NSHL) is a common disorder affecting approximately 1 in 500 newborns. This type of hearing loss is extremely heterogeneous and includes over 100 loci. Mutations in the GJB2 gene have been implicated in about half of autosomal recessive NSHL (ARNSHL) cases, making this the most common cause of ARNSHL. For the latter form of deafness, most f...
متن کاملSpectrum of GJB2 (Cx26) gene mutations in Iranian Azeri patients with nonsyndromic autosomal recessive hearing loss.
OBJECTIVE Hereditary hearing impairment is a genetically heterogeneous disorder. In spite of this, mutations in the GJB2 gene, encoding connexin 26 (Cx26), are a major cause of nonsyndromic recessive hearing loss in many countries and are largely dependent on ethnic groups. The purpose of our study was to characterize the type and prevalence of GJB2 mutations among Azeri population of Iran. M...
متن کاملبررسی اطلاع‌دهندگی مارکر D9S1876 واقع در ناحیه ژنTMC1 در جمعیت ایرانی
Background and Objective: TMC1 gene mutations are known as the most common causes of autosomal recessive non-syndromic hearing loss (ARNSHL) in different populations. According to large size of the TMC1 gene and the large number of identified mutations in this gene, application of polymorphic markers is suggested for carrier detection and prenatal diagnosis in families. In this study, informati...
متن کاملغربالگری ناشنوایان غیرسندرمی جسمی مغلوب برای جایگاه کروموزومی ناشنوایی غیرسندرمی با وراثت مغلوب نوع I(DFNB1) در استان‌های آذربایجان شرقی و غربی
Background & Aim: Hereditary hearing loss(HHL) affects one in 1000-2000 newborns and more than 50% of these cases have a genetic base. About 70% of HHL are nonsyndromic with autosomal recessive forms accounting for 85% of the genetic load. Different genes have been reported to be involved, but mutations in GJB2 gene at DFNB1 locus have been established as the basis of autosomal recessive no...
متن کاملIdentification of Two Disease-causing Genes TJP2 and GJB2 in a Chinese Family with Unconditional Autosomal Dominant Nonsyndromic Hereditary Hearing Impairment
BACKGROUND There are more than 300 genetic loci that have been found to be related to hereditary hearing impairment (HHI), including 92 causative genes for nonsyndromic hearing loss, among which 34 genes are related to autosomal dominant nonsyndromic HHI (ADNSHHI). Traditional linkage analysis and candidate gene sequencing are not effective at detecting the ADNSHHI, especially for the unconditi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- American journal of medical genetics. Part A
دوره 155A 5 شماره
صفحات -
تاریخ انتشار 2011