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[Mutation analysis for a pedigree affected with keratitis-ichthyosis-deafness syndrome].
Zhonghua Yi Xue Yi Chuan Xue za Zhi = Zhonghua Yixue Yichuanxue Zazhi = Chinese Journal of Medical Genetics 2017 October 11
OBJECTIVE: To identify mutation of GJB2 gene and provide genetic counseling for a family affected with keratitis-ichthyosis-deafness (KID) syndrome.
METHODS: Genomic DNA was extracted from peripheral blood samples with a standard phenol-chloroform method. PCR and Sanger sequencing were used to analyze potential mutation in the proband. Suspected mutation was verified with a PCR-high-resolution melting (PCR-HRM) method. T-clone sequencing was applied to determine the parental origin of the mutation.
RESULTS: A heterozygous mutation, c.148G>A (p.Asp50Asn), which is located in the exon 1 of the GJB2 gene, was found in the proband. The results was confirmed by HRM analysis. Cloning sequencing suggested that the mutation was derived from the father's germline.
CONCLUSION: The hot-spot mutation c.148G>A (p.Asp50Asn) in the GJB2 gene probably underlies the KID syndrome in this Chinese family. A PCR-HRM method has been established to rapidly detect common mutations associated with this disease.
METHODS: Genomic DNA was extracted from peripheral blood samples with a standard phenol-chloroform method. PCR and Sanger sequencing were used to analyze potential mutation in the proband. Suspected mutation was verified with a PCR-high-resolution melting (PCR-HRM) method. T-clone sequencing was applied to determine the parental origin of the mutation.
RESULTS: A heterozygous mutation, c.148G>A (p.Asp50Asn), which is located in the exon 1 of the GJB2 gene, was found in the proband. The results was confirmed by HRM analysis. Cloning sequencing suggested that the mutation was derived from the father's germline.
CONCLUSION: The hot-spot mutation c.148G>A (p.Asp50Asn) in the GJB2 gene probably underlies the KID syndrome in this Chinese family. A PCR-HRM method has been established to rapidly detect common mutations associated with this disease.
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