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Mizoguchi, M. et al.

Mutations of the PKD1 gene among Japanese autosomal dominant polycystic kidney disease patients, including one heterozygous mutation identified in members of the same family.

More than 80 mutations of the PKD1 gene have been reported, mostly in patients from Western Europe. New techniques are being used to detect an increasing number of mutations, even in the homologous region of the PKD1 gene. Polymerase chain reaction-single-strand conformation polymorphism (PCR-SSCP) or denaturing high-performance liquid chromatography (DHPLC) analyses were performed in the present study to screen mutations from exon 23 to exon 46 in the PKD1 gene and in the entire PKD2 gene. When an abnormal pattern was found in PCR-SSCP or DHPLC, the PCR products were directly sequenced. Four mutations were identified in the PKD1 gene: a missense mutation (C47413T causing T3509M in exon 35), a splicing mutation (del 20bp in 75 bp of intron 43), and two nonsense mutations (C48566A causing C3693X in exon 38, and C51237T causing Q4124X in exon 45). The nonsense mutation Q4124X existed in only two of three affected sib members in family K68. The pattern of the restriction enzyme digest and the haplotype analysis confirmed the presence of a heterozygous mutation in the family. Fifteen single nucleotide polymorphisms were identified in this study. Two of them (C50439A and C51659T) can be used as intragenic polymorphic markers.[1]

References

Mutations of the PKD1 gene among Japanese autosomal dominant polycystic kidney disease patients, including one heterozygous mutation identified in members of the same family. Mizoguchi, M., Tamura, T., Yamaki, A., Higashihara, E., Shimizu, Y. J. Hum. Genet. (2001) [Pubmed]

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