Screening for GJB2 and GJB6 gene mutations in patients from Campania region with sensorineural hearing loss

Abstract

Abstract

The aim of this study was to screen 349 patients affected by sensorineural hearing loss (SNHL), mostly from the Campania region (southern Italy), for GJB2 gene mutations and for two deletions of the GJB6 gene (del GJB6 -D13S1830 and del GJB6 -D13S1854). We identified pathogenetic GJB2 mutations in 51 cases (15% of patients). No GJB6 mutation was found. We also examined the audiologic features of the patients for whom we had an etiologic diagnosis, in order to identify correlations between the severity of hearing loss and the type of mutation.

Sumario

El objetivo de este estudio fue evaluar 349 pacientes afecta-dos de una hipoacusia sensorineural (SNHL), sobre todo de la región de Campania (Italia del sur), buscando muta-ciones en el gen GJB2 y dos deleciones en el gen GJB6 (del GJB6-D13S1830 y del GJB6-13S1854). Identifica-mos mutaciones patogénicas en 51 pacientes (15% de los pacientes). No se encontraron mutaciones del gen GJB6. También examinamos los rasgos audiológicos de aquellos pacientes de quienes teníamos diagnóstico etiológico, para identificar correlaciones entre la severidad de la pérdida audi-tiva y el tipo de mutación.

Key Words:

• Hearing loss
• GJB2
• GJB6
• Connexin 26
• Connexin 30
• Southern Italy
• Campania Region

Acknowledgements

We thank all subjects who participated in the present project. We are grateful to Jean Ann Gilder for text editing.

Declaration of interest: The authors report no conflicts of interest. The authors alone are responsible for the content and writing of the paper.