Abstract
Classical studies have demonstrated genetic heterogeneity for nonsyndromic autosomal recessive congenital neurosensory deafness. The first two DFNB1 and DFNB2 locations were found using two consanguineous Tunisian families respectively from north and south. We tested these loci for cosegregation with deafness in twenty four southern families with nonsyndromic presumed congenital sensorineural deafness and a pedigree structure consistent with autosomal recessive inheritance. Only in our families, did deafness cosegregate with DFNB1. Although our families are from the south, none of them showed linkage to DFNB2.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Chromosome Segregation / genetics
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Connexin 26
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Connexins / genetics*
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Consanguinity*
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Dyneins / genetics*
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Female
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Gene Frequency / genetics
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Genes, Recessive / genetics
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Genetic Heterogeneity
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Genetic Linkage / genetics
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Genetic Testing
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Genotype
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Hearing Loss, Sensorineural / congenital
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Hearing Loss, Sensorineural / epidemiology
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Hearing Loss, Sensorineural / genetics*
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Humans
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Inheritance Patterns / genetics
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Lod Score
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Male
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Microsatellite Repeats / genetics
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Mutation / genetics*
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Myosin VIIa
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Myosins / genetics*
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Pedigree
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Penetrance
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Polymorphism, Genetic / genetics
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Residence Characteristics / statistics & numerical data
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Tunisia / epidemiology
Substances
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Connexins
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GJB2 protein, human
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MYO7A protein, human
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Myosin VIIa
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Connexin 26
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Myosins
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Dyneins