Abstract
Autosomal dominant polycystic kidney disease (ADPKD) is the most common inherited kidney disease, leading to renal insufficiency and renal transplantation. Mutation screening in the major gene for ADPKD, the polycystic kidney disease type 1 (PKD1) gene, has often been incomplete because of multiple homologous copies of this gene elsewhere on chromosome 16. Furthermore, there are only a few studies investigating genotype–phenotype correlations in patients with ADPKD. In this study, we screened the entire coding region of the PKD1 and PKD2 genes in 17 Finnish families with ADPKD via long-range polymerase chain reaction, single-strand conformation polymorphism analysis, and direct sequencing. We were able to identify mutations co-segregating with ADPKD in all 16 families linked to PKD1 by haplotype analysis. Of these mutations, six were insertions/deletions, five nonsense mutations, and five missense mutations. In the only PKD2-linked family, we found a missense mutation, R322Q. With the exception of one mutation (L845S in PKD1), all mutations were novel. Mutations and their location did not have a strong correlation with the phenotype with the exception of subarachnoidal hemorrhage or brain aneurysm, where mutations were located more often at the 5′ end of the PKD1 gene than at the 3′ end of the PKD1 gene.
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Acknowledgements
This study was supported by grants from the Kuopio University Hospital (EVO grant no. 5117), the Finnish Kidney Foundation, and the Northern Savo Culture Foundation.
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Peltola, P., Lumiaho, A., Miettinen, R. et al. Genetics and phenotypic characteristics of autosomal dominant polycystic kidney disease in Finns. J Mol Med 83, 638–646 (2005). https://doi.org/10.1007/s00109-005-0644-6
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DOI: https://doi.org/10.1007/s00109-005-0644-6