- VernacularTitle:耳聋患者及正常人GJB2基因的突变筛查
- Author:
Zhi-yong XU
1
;
Guo-feng GAO
;
Chang LIU
;
Yu-hua HU
;
Yi LIN
;
Ruan-zhang ZHANG
;
Ming LIU
;
Sha-yan WANG
Author Information
- Publication Type:Journal Article
- MeSH: Adult; Connexin 26; Connexins; genetics; DNA, Mitochondrial; Deafness; genetics; Female; Gene Frequency; Genetic Testing; Hearing Loss; genetics; Hearing Loss, Sensorineural; genetics; Humans; Infant, Newborn; Male; Mutagenesis, Insertional; Mutation; Persons With Hearing Impairments; Polymorphism, Genetic; Sequence Deletion
- From: Chinese Journal of Medical Genetics 2009;26(2):144-146
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVETo detect the GJB2 gene mutation in patients with autosomal-recessive deafness, and analyze the relationship between clinical phenotype and gene mutation.
METHODSForty-two patients were examined clinically by pure tone audiometry, acoustic impedance and auditory brainstem response. The complete coding region of the GJB2 gene was amplified by polymerase chain reaction (PCR) and the PCR products were subjected to automatic DNA sequencing.
RESULTSTwo cases had homozygous mutation of 235delC. One of them had sensorineural hearing loss while the other had mixed hearing loss. Heterozygous mutation of 176del16bp was detected in a pair of twins who had mixed hearing loss. The 109G to A, 79G to A and 341A to G mutations were observed in both the patients and the controls.
CONCLUSIONHomozygous 235delC mutation is one of the pathogeni c mutations which could occur in patients with mixed hearing loss. The heterozygous 176del16bp mutation combined with environmental factor may cause hearing loss. The 109G to A, 79G to A and 341A to G variants were considered to be polymorphisms of the GJB2 gene.