نتایج جستجو برای: جهش های gjb2
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نقص شنوایی حسی-عصبی دو طرفه یکی از شایع‌ترین نقص‌های مادرزادی است که دارای شیوع یک در هزار در بین نوزادان، می‌باشد. اکثر موارد ناشنوایی غیر سندرومی بوده و حدود هشتاد درصد از بیماران مبتلا به ناشنوایی حسی-عصبی، الگوی وراثت اتوزوم مغلوب را نشان می‌دهند. ناشنوایی غیر سندرمی اتوزومی مغلوب یک اختلال بسیار هتروژن بوده که تا کنون بیش از 70 لوکوس و حدود 50 ژن برای آن شناخته شده است. در این مطالعه ما به...
mutations in the gjb2 gene encoding connexin 26 (cx26) protein are a major cause for autosomal recessive non syndromic and sporadic deafness in many populations. in this study we have investigated the prevalence of the gjb2 gene mutations using nested pcr pre screening strategy and direct sequencing method. two hundred and sixty autosomal recessive non syndromic and sporadic deaf subjects from ...
Background: C.35delG/GJB2 mutation is the most frequent genetic cause of deafness in Caucasians. Another frequent mutation in some Caucasian populations is del(GJB6-D13S1830). Both GJB2 and GJB6 genes belong to the same DFNB1 locus and when the two mutations are found in combination in a hearing-impaired person, a digenic pattern of inheritance is suggested. Methods: We examined 63 Croatian sub...
CONCLUSION We have demonstrated differences in cortical activation with language-related visual stimuli in patients who were profoundly deafened due to genetic mutations in GJB2 and SLC26A4. The differences in cortical processing patterns between these two cases may have been influenced by the differing clinical courses and pathogenesis of hearing loss due to genetic mutations. Our results sugg...
The genetic nature of sensorineural hearing loss (SNHL) has so far been studied for many ethnic groups in various parts of the world. The single-nucleotide guanine deletion (35delG) of the GJB2 gene coding for connexin 26 was shown to be the main genetic cause of autosomal recessive deafness among Europeans. Here we present the results of the first study of GJB2 and three mitochondrial mutation...
Pancreatic cancer is a complex and heterogeneous disease with the etiology largely unknown. The deadly nature of pancreatic cancer, with an extremely low 5-year survival rate, renders urgent a better understanding of the molecular events underlying it. The aim of this study is to investigate the gene expression module of pancreatic adenocarcinoma and to identify differentially expressed genes (...
زمینه و هدف: ناشنوایی یک اختلال حسی، عصبی است و بیشترین اختلال موجود در هنگام تولد است. بیش از 60% موارد ناشنوایی ارثی است. انواع ژنتیکی آن به دو نوع سندرومی و غیر سندرومی تقسیم می شود که نا شنوایی غیر سندرومی مغلوب اتوزومی (ARNSHL) با بیشترین درصد (70%) رخ می دهد. این مطالعه با هدف تعیین پیوستگی ژنتیکی به لوکوس DFNB93 در خانواده های مبتلا به ARNSHL انجام شد. روش بررسی: این مطالعه توصیفی آزم...
H earing impairment is a common and highly heterogeneous sensory disorder. Genetic causes are thought to be responsible for more than 60% of the cases in developed countries. In the majority of cases, non-syndromic hearing impairment is inherited in an autosomal recessive pattern. Thirty eight different loci and 20 genes for autosomal recessive non-syndromic hearing impairment (ARNSHI) have bee...
Postnatal permanent childhood hearing impairment (PCHI) is frequent (0.25%-0.99%) and difficult to detect in the early stage, which may impede the speech, language and cognitive development of affected children. Genetic tests of common variants associated with postnatal PCHI in newborns may provide an efficient way to identify those at risk. In this study, we detected a strong association of th...
Mutations in the GJB2 gene are the most common known cause of hereditary congenital hearing loss. Rapid genomic DNA extraction (RGDE) method was used for genomic DNA extraction. After amplification of coding region of CX26 gene with specific primers, expected PCR products with 724bp length were subjected to direct sequencing in both directions. We describe here a novel heterozygous -T to -C tra...
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