PMID: 20627047Jul 16, 2010Paper

Sequence analysis of GJB3 in Chinese deafness population who carry one heterozygous GJB2 pathogenic mutation

Zhonghua er bi yan hou tou jing wai ke za zhi = Chinese journal of otorhinolaryngology head and neck surgery
Yongyi YuanPu Dai

Abstract

To investigate whether GJB3 and GJB2 interaction to produce a deafness phenotype in a digenic mode of inheritance in Chinese deafness population. A series of 108 patients with severe or profound hearing loss carrying one heterozygous GJB2 pathogenic mutation were sequenced for GJB3 coding region, which compared with the data of control group. Three GJB3 missense variants including V84I, A194T and N166S, and four GJB3 nonsense mutation were detected. N166S and A194T were considered as pathogenic which cause nonsyndromic autosomal recessive hearing loss and V84I was considered as polymorphisms in Chinese population. The two patients who carried N166S and A194T respectively in one allele also carried GJB2 235delC mutation in other allele, while the other patient who carried A194T in one allele also carried GJB2 299_300delAT mutation in other allele. GJB3 and GJB2 might interact to produce deafness in a digenic mode of inheritance, but the point need to be proved in further study.

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