Analysis of GJB2 gene and mitochondrial DNA A1555G mutations in 16 families with non-syndromic hearing loss / 中华医学遗传学杂志
Chinese Journal of Medical Genetics
;
(6): 388-392, 2012.
Article
in Chinese
| WPRIM
| ID: wpr-295473
ABSTRACT
<p><b>OBJECTIVE</b>To screen for genetic mutations in families featuring non-syndromic hearing loss.</p><p><b>METHODS</b>Sixteen families with non-syndromic hearing loss were interviewed to identify medical histories by a questionnaire. Audiological and neurological examinations were conducted for all families. Coding regions of GJB2 and 12S rRNA genes were amplified and sequenced.</p><p><b>RESULTS</b>Of the 17 patients with sensorineural hearing loss, 3 were homozygous mutation for GJB2 235 delC, 1 was 235 delC heterozygous mutation, 1 was 235 delC+299_300 delAT compound heterozygous mutation, and 6 were 79G>A+341G>A heterozygosis in cis mutation. No 1555A>G mutation of mitochondrial DNA (mtDNA) was found in the 16 families.</p><p><b>CONCLUSION</b>The incidence of mtDNA 12S rRNA 1555A>G mutation in Jiangsu province may be lower than the average across China. Mutations of GJB2 genes may account for as much as 64.7% of non-syndromic hearing loss in this study. Screening for such mutations and genetic counseling may play an important role in the prevention of hereditary hearing loss.</p>
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Pedigree
/
DNA, Mitochondrial
/
RNA, Ribosomal
/
Molecular Sequence Data
/
Base Sequence
/
Connexins
/
Genetic Predisposition to Disease
/
Connexin 26
/
Genetics
/
Hearing Loss
Limits:
Adolescent
/
Child
/
Child, preschool
/
Female
/
Humans
/
Infant
/
Male
Language:
Chinese
Journal:
Chinese Journal of Medical Genetics
Year:
2012
Type:
Article
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