congratulation to margaret chan familial and sporadic gjb2-related deafness in iran: review of gene mutations

نویسندگان

m hashemzadeh chaleshtori

dd farhud

ma patton

چکیده

background: mutations in the gjb2 gene encoding connexin 26 protein, are the main cause for autosomal recessive and sporadic non syndromic hearing loss in many populations. here, we have taken together and reviewed results from our six previous publications, our unpublished data from ten iranian provinces, as well as data from two previous mutation reports to provide a comprehensive collection of data for gjb2 mutations and deafness in iran. methods: in all, 1095 hearing impaired students and their deaf siblings from 890 families in 10 provinces of iran were studied. the prevalence and type of the gjb2 gene mutations were investigated using nested pcr pre screening strategy and direct sequencing of the coding exon of the gene. results: altogether 31 different genetic variants were detected from which 17 gjb2 mutations were identified. gjb2 mutations were found in 14.6% of deaf families (18.29% of familial and 12.7% of sporadic cases). we found gjb2 mutations in both alleles in 78% of gjb2 mutations chromosomes. however, 35delg mutation was the most common gjb2 mutation accounting for 74.5% of the mutations in populations studied. conclusion: our data indicated that a specific combination of gjb2 mutations types and frequencies was presented in different populations of iran. these results also highlight the importance of gjb2 mutations in development of hearing loss in familial and sporadic deaf families in different parts of the country and can be used as a basis of genetic counseling and clinical guideline in iran.

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Mutation analysis of familial GJB2-related deafness in Iranian Azeri Turkish patients.

AIMS Mutations in the GJB2 gene-encoding connexin 26 protein are the main cause for autosomal recessive nonsyndromic hearing loss worldwide. In this study, we assessed the contributions made by GJB2 and del(GJB6-D13S1830) mutations to the autosomal recessive nonsyndromic deafness genetic load in Iranian Azeri Turkish patients. RESULTS Probands from 209 different nuclear families were investig...

متن کامل

Study of six mutations in the gjb2 gene in Cuban patients with nonsyndromic sensorineural deafness

Deafness is a partial or total hearing loss that can appear at any ages and with different degrees of severity. About 50% of hearing disorders have a genetic origin, and among them, the nonsyndromic sensorineural deafness represents 70% of the cases. Out of these, the 80% correspond to autosomal recessive inheritance deafness. Autosomal recessive deafness has not been characterized enough at mo...

متن کامل

MEFV Gene Profile in Northwest of Iran, Twelve Common MEFV Gene Mutations Analysis in 216 Patients with Familial Mediterranean Fever

Familial Mediterranean Fever (FMF) is a hereditary autoinflammatory disease with autosomal recessive inheritance pattern often seen around the Mediterranean Sea. It is characterized by recurrent episodes of fever and polyserositis and rash. Recently, MEFV gene analysis determines the definitive diagnosis of FMF. In this study, we analyzed 12 MEFV gene mutations in more than 200 FMF patients, pr...

متن کامل

طیف جهش های ژن GJB2 در نانوایان غیر سندرومی آتوزومی مغلوب در استان یزد

Introduction: Hearing loss is the most common sensory neural defect in humans, affecting 1 in 1000 neonates, with over half of these cases predicted to be hereditary in nature. Most hereditary hearing loss is inherited in a recessive fashion, accounting for approximately 80 % of non-syndromic hearing loss (NSHL). Mutations in GJB2 gene are major cause of inherited deafness in the European an...

متن کامل

Association of Pathogenic Missense and Nonsense Mutations in Mitochondrial COII Gene with Familial Adenomatous Polyposis (FAP)

Nuclear genetic mutations have been extensively investigated in solid tumors. However, the role of the mitochondrial genome remains uncertain. Since the metabolism of solid tumors is associated with aerobic glycolysis and high lactate production, tumors may have mitochondrial dysfunctions. Familial adenomatous polyposis (FAP) is a rare form‌ of colorectal cancer and an autosomal dominant inheri...

متن کامل

منابع من

با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید


عنوان ژورنال:
iranian journal of public health

جلد ۳۶، شماره ۱، صفحات ۱-۱۴

کلمات کلیدی

میزبانی شده توسط پلتفرم ابری doprax.com

copyright © 2015-2023