Genetic analysis and prenatal diagnosis for non-syndromic hearing impairment / 中华医学遗传学杂志
Chinese Journal of Medical Genetics
; (6): 518-521, 2013.
Article
in Zh
| WPRIM
| ID: wpr-237215
Responsible library:
WPRO
ABSTRACT
<p><b>OBJECTIVE</b>To detect genetic mutations underlying non-syndromic hearing impairment (NSHI) and establish a method for prenatal diagnosis.</p><p><b>METHODS</b>Sixty six NSHI patients were included in this study. DNA was extracted from peripheral blood. Genetic mutations were detected by gene chip analysis and direct sequencing of GJB2 gene. For 7 pregnant women at high risk, prenatal genetic diagnosis was provided.</p><p><b>RESULTS</b>Fourteen cases (21.21%) were found to have GJB2 mutations by both methods (homozygous 235delC mutation in 3 cases, homozygous 176del16 mutation in 2 cases, 235delC and 299delAT compound heterozygous mutation in 2 cases, 299delAT and 176del16 compound heterozygous mutation in 1 case, c.339T > G and 313del12bp compound heterozygous mutation 1 case, and 235delC heterozygous mutation in 5 cases). 13 (19.70%) had SLC26A4 mutations (IVS7-2 A >G homozygous mutation in 2 cases, IVS7-2 A > G homozygous mutation in 2 cases, IVS7-2 A > G and 2168A > G compound heterozygous mutation in 3 cases, 2168A>G heterozygous mutation in 3 cases, and IVS7-2 heterozygous mutation in 3 cases); and 3 had mtDNA12S rRNA mutation (1555A > G mutation in 2 cases, 1494C > T mutation in 1 case). Prenatal diagnosis suggested that 3 fetuses have carried a heterozygous mutation. Two fetuses were detected as normal and confirmed to have normal hearing after birth. Two fetuses were found to have carried compound mutations of GJB2.</p><p><b>CONCLUSION</b>Gene chip combined with GJB2 gene analysis is an accurate and effective method for the diagnosis of NSHI. The results can facilitate accurate prenatal diagnosis.</p>
Full text:
1
Index:
WPRIM
Main subject:
Membrane Transport Proteins
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Prenatal Diagnosis
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Molecular Sequence Data
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Base Sequence
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Genetic Testing
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Connexins
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Diagnosis
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Connexin 26
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Genetics
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Hearing Loss
Type of study:
Diagnostic_studies
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Prognostic_studies
Limits:
Adolescent
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Adult
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Child
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Child, preschool
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Female
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Humans
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Infant
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Male
Language:
Zh
Journal:
Chinese Journal of Medical Genetics
Year:
2013
Type:
Article