P. [V27i; E114g] Compound Heterozygous State in Gjb2 Gene Could Be an Indicator of the Severity of Congenital Hearing Loss
Tufan T*, Erkoc MA, Yilmaz MB, Comertpay G and Alptekin D
Department of Medical Biology, University of Cukurova, Adana, Turkey
- *Corresponding Author:
- Tufan T
Department of Medical Biology
University of Cukurova, Adana, Turkey
E-mail: [email protected]
Received date:: August 09, 2015 Accepted date:: August 20, 2015 Published date:: August 27, 2015
Citation: Tufan T, Erkoc MA, Yilmaz MB, Comertpay G, Alptekin D (2015) P. [V27i; E114g] Compound Heterozygous State in Gjb2 Gene Could Be an Indicator of the Severity of Congenital Hearing Loss. Otolaryngol (Sunnyvale) 5:209. doi:10.4172/2161-119X.1000209
Copyright: © 2015 Tufan T, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Hearing loss (HL) is the most common sensory disorder, affecting all age groups, ethnicities, and genders. Several genes responsible for hearing loss are related to ion recycling and homeostasis in the inner ear. Mutations in GJB2 gene, the gene encoding gap junction protein connexin26 (Cx26), are most common detected in patients with congenital, recessively inherited, nonsyndromic HL in humans. In order to investigate the molecular etiology of patients with congenital, recessively inherited, and nonsyndromic HL and healthy individuals as control in a family, they were included in this study. Thus, exons of GJB2 gene were amplified by polymerase chain reaction (PCR) and sequenced. In this family, V27I missense mutation and V27I + E114G compound heterozygosity were detected in the results of sequence analysis. The V27I mutation was found in patient with severe HL and healthy individuals. The V27I + E114G compound heterozygosity was detected only in deaf patients. Based on our data, V27I mutations could be considered as a polymorphism not leading to HL. Since V27I + E114G compound heterozygosity was found only in deaf patients, it could be considered as a contributor of HL severity.