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Screening of 38 genes identifies mutations in 62% of families with nonsyndromic deafness in Turkey
- Source :
- Genetic testing and molecular biomarkers. 15(1-2)
- Publication Year :
- 2010
-
Abstract
- More than 60% of prelingual deafness is genetic in origin, and of these up to 95% are monogenic autosomal recessive traits. Causal mutations have been identified in 1 of 38 different genes in a subset of patients with nonsyndromic autosomal recessive deafness. In this study, we screened 49 unrelated Turkish families with at least three affected children born to consanguineous parents. Probands from all families were negative for mutations in the GJB2 gene, two large deletions in the GJB6 gene, and the 1555A>G substitution in the mitochondrial DNA MTRNR1 gene. Each family was subsequently screened via autozygosity mapping with genomewide single-nucleotide polymorphism arrays. If the phenotype cosegregated with a haplotype flanking one of the 38 genes, mutation analysis of the gene was performed. We identified 22 different autozygous mutations in 11 genes, other than GJB2, in 26 of 49 families, which overall explains deafness in 62% of families. Relative frequencies of genes following GJB2 were MYO15A (9.9%), TMIE (6.6%), TMC1 (6.6%), OTOF (5.0%), CDH23 (3.3%), MYO7A (3.3%), SLC26A4 (1.7%), PCDH15 (1.7%), LRTOMT (1.7%), SERPINB6 (1.7%), and TMPRSS3 (1.7%). Nineteen of 22 mutations are reported for the first time in this study. Unknown rare genes for deafness appear to be present in the remaining 23 families.
- Subjects :
- MYO15A
Genotype
Turkey
Population
Deafness
medicine.disease_cause
Connexins
otorhinolaryngologic diseases
medicine
OTOF
Humans
Nonsyndromic deafness
education
Hearing Loss
Genetics (clinical)
Genetics
education.field_of_study
Mutation
biology
Haplotype
General Medicine
medicine.disease
Connexin 26
Genetics, Population
biology.protein
GJB6
Subjects
Details
- ISSN :
- 19450257
- Volume :
- 15
- Issue :
- 1-2
- Database :
- OpenAIRE
- Journal :
- Genetic testing and molecular biomarkers
- Accession number :
- edsair.doi.dedup.....06808c8998430dba846a3a5abe8f9838