| Autor: |
Shun-chang, Sun, Yi-xin, Liu, Yun-sheng, Peng, Hai-fei, Li, Chun-ying, Xie |
| Rok vydání: |
2011 |
| Předmět: |
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| Zdroj: |
Zhonghua yi xue yi chuan xue za zhi = Zhonghua yixue yichuanxue zazhi = Chinese journal of medical genetics. 28(4) |
| ISSN: |
1003-9406 |
| Popis: |
To analyze the coding sequence of GJB2 gene in six pedigrees with nonsyndromic hearing loss in order to find deafness-causing mutations in the GJB2 gene, and to explore the inherent pattern of deafness-causing mutations in the GJB2 gene.Genomic DNA was extracted from peripheral blood for the probands and their family members. Coding sequence of the GJB2 gene was amplified by polymerase chain reaction, sequence variations were determined by DNA sequencing. Amplified fragments with overlapping peaks on sequencing chromatogram were sequenced by TA cloning in order to determine whether the mutations originated from the same allele.Mutations in the GJB2 gene were found in 4 out of the 6 pedigrees with nonsyndromic hearing loss. Four types of mutations were detected in the GJB2 gene, which were 235delC, 299-300delAT, 79GA+341AG, and 109GA. Compound heterozygous polymorphisms 79GA and 341AG, and mutations 109GA and 235delC had deafness-causing effects.Heterogeneous mutations of the GJB2 gene are frequently seen in patients with nonsyndromic hearing loss. Sometimes, polymorphisms may cause deafness when they are combined. Environmental factors and other genes may contribute to hearing loss caused by the GJB2 gene mutations. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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