Refining the localization of the PKD2 locus on chromosome 4q by linkage analysis in Spanish families with autosomal dominant polycystic kidney disease type 2
- Unidad de Genetica Molecular, Madrid (Spain)
- Hospital de Galdacano (Spain)
- Genethon, Evry (France)
Autosomal dominant polycystic kidney disease (ADPKD) is a genetically heterogeneous disorder. At least two distinct forms of ADPKD are now well defined. In {approximately}86% of affected European families, a gene defect localized to 16p13.3 was responsible for ADPKD, while a second locus has been recently localized to 4q13-q23 as candidate for the disease in the remaining families. We present confirmation of linkage to microsatellite markers on chromosome 4q in eight Spanish families with ADPKD, in which the disease was not linked to 16p13.3. By linkage analysis with marker D4S423, a maximum lod score of 9.03 at a recombination fraction of .00 was obtained. Multipoint linkage analysis, as well as a study of recombinant haplotypes, placed the PKD2 locus between D4S1542 and D4S1563, thereby defining a genetic interval of {approximately}1 cM. The refined map will serve as a genetic framework for additional genetic and physical mapping of the region and will improve the accuracy of presymptomatic diagnosis of PKD2. 25 refs., 4 figs., 1 tab.
- OSTI ID:
- 70390
- Journal Information:
- American Journal of Human Genetics, Vol. 56, Issue 1; Other Information: PBD: Jan 1995
- Country of Publication:
- United States
- Language:
- English
Similar Records
Autosomal dominant polycystic kidney disease: Localization of the second gene to chromosome 4q13-q23
Genetic heterogeneity of polycystic kidney disease in Bulgaria