Männikkö M, Kestailä M, Holmberg C, Norio R, Ryynänen M, Olsen A, Peltonen L, Tryggvason K
Biocenter Oulu, University of Oulu, Finland.
Am J Hum Genet. 1995 Dec;57(6):1377-83.
We have recently localized the gene for congenital nephrotic syndrome of the Finnish type (CNF) to chromosome 19q12-13.1. On the basis of observed recombination events, the gene was localized between markers D19S416/D19S425/D19S213/D19S208/D19S191 and D19S224. Here we have extended the mapping efforts, on the basis of a detailed physical map of the region. By means of three new polymorphic markers--D19S608, D19S609, and D19S610--developed in this study, the critical candidate region could be further restricted. Significant linkage disequilibrium was observed with markers D19S610, D19S608, D19S224, and D19S220, the strongest allelic association being 84% with marker D19S610 at 19q13.1. This suggests that the CNF gene locus lies in close proximity to marker D19S610. Combination of the informative markers revealed four main haplotype categories. Different geographic distribution was observed between these haplotype groups when they were placed on the map of finland according to the birthplaces of grandparents.
我们最近已将芬兰型先天性肾病综合征(CNF)的基因定位于19号染色体的q12 - 13.1区域。根据观察到的重组事件,该基因定位于标记D19S416 / D19S425 / D19S213 / D19S208 / D19S191和D19S224之间。在此,我们基于该区域详细的物理图谱扩展了定位工作。通过本研究开发的三个新的多态性标记——D19S608、D19S609和D19S610——关键候选区域可进一步缩小。观察到与标记D19S610、D19S608、D19S224和D19S220存在显著的连锁不平衡,在19q13.1处与标记D19S610的最强等位基因关联为84%。这表明CNF基因座紧邻标记D19S610。信息性标记的组合揭示了四个主要的单倍型类别。当根据祖父母的出生地将这些单倍型组置于芬兰地图上时,观察到它们之间存在不同的地理分布。