GJB2 allele variants and the associated audiologic features identified in Chinese patients with less severe idiopathic hearing loss
| Autor: | Huawei Li, Zhengmin Wang, Wenjia Dai, Jianning Zhang, Yongmei Zeng |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Adult
Male medicine.medical_specialty China Adolescent Genotype Hearing loss Hearing Loss Sensorineural DNA Mutational Analysis Gastroenterology Severity of Illness Index Connexins Hearing Loss Bilateral Young Adult Asian People Internal medicine Genetic variation Severity of illness otorhinolaryngologic diseases medicine Humans Allele Young adult Child Genetics (clinical) Genetics medicine.diagnostic_test business.industry Genetic Variation Auditory Threshold General Medicine Audiogram Middle Aged Connexin 26 Phenotype Child Preschool Mutation Audiometry Pure-Tone Female medicine.symptom Audiometry business |
| Zdroj: | Genetic testing and molecular biomarkers. 15(5) |
| ISSN: | 1945-0257 |
| Popis: | To explore possible correlations between the genotype of GJB2, the gene that encodes connexin 26 (Cx26), and its related audiogram features in Chinese patients with less severe nonsyndromic hearing loss (HL), we examined the pure tone audiograms and GJB2 coding region allele variants in 236 patients.Twelve of 34 (35.3%) patients with biallelic GJB2 mutations had totally asymmetric HL, a significantly higher prevalence than in patients with wild-type GJB2 (p = 0.027). In patients with biallelic GJB2 mutations, the percentages of cases with sloping, flat, and differently shaped audiograms between ears were 44.1%, 11.8%, and 35.3%, respectively; however, in patients with wild-type GJB2, the percentages were 72.4%, 3.4%, and 21.1%, respectively. Significant differences were found between patients with wild-type GJB2 and those with biallelic GJB2 mutations (p = 0.013) as well as those with single GJB2 mutations (p = 0.043). Threshold differences between ears were significantly higher in patients carrying GJB2 polymorphisms than in patients with wild-type GJB2 at 250-8000 Hz (p 0.05). The threshold changes at adjacent octaves showed significant differences between groups at each adjacent frequency from 4000 to 8000 Hz (p = 0.04).The patients who carried biallelic pathogenic Cx26 mutations showed asymmetric HL compared with the patients who carried wild-type Cx26. The threshold difference and threshold changes at adjacent octaves between ears were higher in the patients with Cx26 polymorphisms. |
| Databáze: | OpenAIRE |
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