hearing loss (hl) is the most frequent sensory defect affecting 1 in 1000 neonates. this can occur due to genetic or environmental causes or both. the genetic causes are very heterogenous and over 100 loci have been identified to cause autosomal recessive non - syndromic hearing loss (arnshl). the aim of this study was to determine the contribution of the lrtomt gene mutations in causing arnshl...

Non syndromic hearing impairment is a common sensory disorder, which affects one in 600 newborns. Though more than 50 nuclear genes are involved in causing non syndromic hearing impairment, mutations in the connexin 26 (GJB2) gene explain a high proportion of congenital deafness in several populations worldwide. The diversity of genes and genetic loci implicated in hearing loss defines the comp...

objective: hearing loss is the most frequent neurosensory defect in human. mutations in gjb2 and gjb6 are responsible for 50% of autosomal recessive non-syndromic hearing loss (arnshl) cases. here we report on the frequencies of gjb2 and gjb6 mutations and three large deletions spanning the gjb6 gene including del (gjb6-d13s1830), del (gjb6-d13s1854) and a >920 kb deletion in patients affected ...

the 35delg mutation in the connexin 26 gene (cx26), at the dnfb1 locus is the most common mutation in the patients with autosomal recessive non-syndromic hearing loss (arnshl). we have studied a total of 224 deaf cases from 189 families in two populations of iran (sistan va bluchestan and hormozgan provinces) by prescreening nested pcr, polyacrylamide gel electrophoresis and consequent direct s...

BACKGROUND Mutations in CDH23 are responsible for Usher syndrome 1D and recessive non-syndromic hearing loss. In this study, we revealed the prevalence of CDH23 mutations among patients with specific clinical characteristics. METHODS After excluding patients with GJB2 mutations and mitochondrial m.1555A > G and m.3243A > G mutations, subjects for CDH23 mutation analysis were selected accordin...

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 here, we have taken together and reviewed results from our six previous publications, our unpublished data from ten iranian provinces, as well as data from two previous mutation reports to provide a comprehensive collection ...

mutations in the gjb2 gene at the dfnb1 locus on chromosome 13q12 are associated with autosomal recessive non syndromic hearing loss (arnshl) in many populations. a single mutation, at position 35 (35delg) accounts for approximately 30-63% of mutations in white populations with a carrier frequency of 1.5-2.5% in most european, north american and mediterranean populations. in this study we have ...

Tight junctions (TJs) are essential components of eukaryotic cells, and serve as paracellular barriers and zippers between adjacent tissues. TJs are critical for normal functioning of the organ of Corti, a part of the inner ear that causes loss of sensorineural hearing when damaged. To investigate the relation between genes involved in TJ function and hereditary loss of sensorineural hearing in...

this study aimed to investigate the contribution of four common dfnb (“dfn” for deafness and “b” for autosomal resessive locus) loci and gjb2 gene mutations (exon 2) in hearing impairment in individuals living in markazi and qom provinces of iran. forty consanguineous iranian families with at least three affected individuals in family or pedigree who suffer from an autosomal recessive non-syndr...