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   <subfield code="a">A genotype-phenotype correlation in Sicilian patients with GJB2 biallelic mutations</subfield>
   <subfield code="h">[Elektronische Daten]</subfield>
   <subfield code="c">[Francesco Martines, Pietro Salvago, Caterina Bartolotta, Salvatore Cocuzza, Carmelo Fabiano, Sergio Ferrara, Eleonora La Mattina, Marianna Mucia, Pietro Sammarco, Federico Sireci, Enrico Martines]</subfield>
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   <subfield code="a">Abstract : The aim of this work was to study the genotype distribution of Sicilian patients with biallelic GJB2 mutations; to correlate genotype classes and/or specific mutations of GJB2 gene (35delG-non-35delG) with audiologic profiles. A total of 10 different mutations and 11 different genotypes were evidenced in 73 SNHL subjects; 35delG (90.36% of cases) and IVS1+1 (13.69%) were the most common mutations found in the cohort with a significant difference in the distribution between North and South Sicily. Audiological evaluation revealed a severe (16/73) to profound (47/73) hearing loss (HL) in 86.13% of cases without significant difference between the degree of HL and the province of origin of the subjects (P=0.727). The homozygous truncating (T/T) genotype was the most widespread (89.04% of cases), with a severe-to-profound hearing impairment in 90.36% of T/T class with respect to truncating/non-truncating (T/NT) and non-truncating/non-truncating (NT/NT) genotypes (P=0.012). From the comparison of homozygous 35delG and 35delG/non-35delG genotypes, a more profound HL in the homozygous 35delG than in compound heterozygous 35delG/non-35delG (p&lt;0.0001) resulted. This study confirms that 35delG is the most common mutation in the Mediterranean area with a heterogeneous distribution of the genotypes between North and South Sicily; probands homozygotes for 35delG or presenting a T/T genotype are more apt to have a severe-to-profound HL.</subfield>
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   <subfield code="a">Springer-Verlag Berlin Heidelberg, 2014</subfield>
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   <subfield code="a">GJB2 mutations</subfield>
   <subfield code="2">nationallicence</subfield>
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   <subfield code="a">Sensorineural hearing loss</subfield>
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   <subfield code="a">Genetic hearing loss</subfield>
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   <subfield code="u">Dipartimento di Biomedicina Sperimentale e Neuroscienze Cliniche (BioNeC), Sezione di Otorinolaringoiatria, Università degli Studi di Palermo, Via del Vespro, 129, 90127, Palermo, Italy</subfield>
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   <subfield code="u">Dipartimento di Biomedicina Sperimentale e Neuroscienze Cliniche (BioNeC), Sezione di Otorinolaringoiatria, Università degli Studi di Palermo, Via del Vespro, 129, 90127, Palermo, Italy</subfield>
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   <subfield code="u">Laboratorio di Genetica Molecolare, Ospedali Riuniti ‘Villa Sofia, V. Cervello', Via Trabucco, 90100, Palermo, Italy</subfield>
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   <subfield code="u">Department of Medical Surgical Specialities, ENT Clinic, University of Catania, Policlinico Universitario ‘‘Gaspare Rodolico'', Via Santa Sofia, 68, 95125, Catania, Italy</subfield>
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   <subfield code="u">Dipartimento di Biomedicina Sperimentale e Neuroscienze Cliniche (BioNeC), Sezione di Otorinolaringoiatria, Università degli Studi di Palermo, Via del Vespro, 129, 90127, Palermo, Italy</subfield>
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