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  • 11
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract We have mainly used 3 highly polymorphic DNA markers, 3′HVR (D16S85), 16AC2.5 (D16S291) and SM7 (D16S283), flanking the PKD1 region on chromosome 16p13.3 to establish linkage status in seven Icelandic families with autosomal dominant polycystic kidney disease (ADPKD). In four families, the disease locus is in the PKD1 region, and three families are “unlinked” to chromosome 16p13.3. In one of the “unlinked” families, the disease locus is excluded from a part of the long arm of chromosome 2, and we support a theory of more than 2 loci being responsible for ADPKD. Our data confirm the location of the locus YNH24 (D2S44) to chromosome 2q13-q24.
    Type of Medium: Electronic Resource
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  • 12
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Polycystic kidney disease is an inherited heterogeneous disorder that affects approximately 1∶1000 Europeans. It is characterized mainly by the formation of cysts in the kidney that lead to end-stage renal failure with late age of onset. Three loci have been identified, PKD1 on the short arm of chromosome 16, which has recently been isolated and characterized, PKD2 on the long arm of chromosome 4, and a third locus of unknown location, that is apparently much rarer. In families that transmit the PKD2 gene there is a significantly later age of onset of symptoms, compared with families that transmit the PKD1 gene, and in general they present with milder progression of symptomatology. For the first time we attempted molecular genetic analysis in seven Cypriot families using highly polymorphic markers around the PKD1 and PKD2 genes. Our data showed that there is genetic and phenotypic heterogeneity among these families. For four of the families we obtained strong evidence for linkage to the PKD1 locus. In two of these families linkage to PKD1 was strengthened by excluding linkage to PKD2 with the use of marker D4S423. In three other families we showed linkage to the PKD2 locus. In the largest of these families one recombinant placed marker D4S1534 distal to D4S231, thereby rendering it the closest proximal marker known to us to date. The application of molecular methods allowed us to make presymptomatic diagnosis for a number of at-risk individuals.
    Type of Medium: Electronic Resource
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  • 13
    ISSN: 1432-1211
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract T cells of two donors, JR (HLA-A23, 29; B7,7; G; DRw5) and HG (HLA-A2, 23; B40, w44; Cw4), were stimulated with cells from an HLA homozygous lymphoblastoid cell line JY (HLA-A2, 2; B7,7, C-, DRw4, 6) and cloned by limiting dilution after the third stimulation. Two cytotoxic T-cell (CTL) clones, JR-2-16 (from donor JR) and HG-31 (from donor HG), were used for detailed studies. The results of a panel study using lymphocytes from HLA-typed individuals and a study with two HLA recombinant families indicate that the antigens recognized by the CTL clones JR-2-16 and HG-31 were highly associated with HLA-A2 and HLA-B7, respectively. Blocking studies with a monoclonal antibody recognizing a framework determinant on HLA-A, -B and-C antigens and a monoclonal antibody reacting with HLA-A2 support the notion that JR-2-16 and HG-31 interact with the HLA-A2 and the HLA-B7 antigens per se. However, these clones did not recognize the HLA-A2 and HLA-B7 of all donors typed for these antigens, suggesting that the HLA-A2 and HLA-B7 antigens of these particular donors are variants of the serologically defined HLA antigens. These results indicate that in vitro-derived human CTL clones detect variations in the serologically defined allospecificities and can be used as reagents to elucidate the polymorphism of HLA antigens further.
    Type of Medium: Electronic Resource
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  • 14
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A detailed marker gene study in a large Dutch kindred segregating for a reciprocal translocation between the chromosomes 6 and 20, t(6;20) (p21;p13), revealed a close linkage between the HLA genes and the breakpoint on the short arm of 6. During this study an apparent peak lod score of 2.9 was obtained at a recombination value of 0.05 for a linkage between HLA and the breakpoint, indicating that the chromosomal region, carrying the HLA genes, is situated near the breakpoint in band 6p21 close to the transition to 6p22.
    Type of Medium: Electronic Resource
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  • 15
    Electronic Resource
    Electronic Resource
    Springer
    Human genetics 〈Berlin〉 38 (1977), S. 7-13 
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Cytogenetic findings in a case of partial trisomy 6p due to a translocation t(6;20)(p21;p13) and eleven balanced translocation heterozygotes are described. The clinical data of the proposita are compared with those of five other published cases. A partial trisomy 6p syndrome is postulated, characterized by: low birth weight, psychomotor retardation, craniofacial abnormalities (such as high prominent forehead, large fontanel, wide sagittal suture, blepharoptosis, low-set and/or malformed ears), congenital heart malformation, small kidneys, and proteinuria. Linkage studies have shown that the breakpoint in chromosome 6 involved in this translocation is close to the HLA gene cluster.
    Type of Medium: Electronic Resource
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