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Characterization of a susceptibility locus for SLE, SLEB5, on chromosome 4p14-13
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Genetics and Pathology.
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Genetics and Pathology.
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2006 (English)In: Scandinavian Journal of Immunology, ISSN 0300-9475, E-ISSN 1365-3083, Vol. 64, no 3, 308-313 p.Article in journal (Refereed) Published
Abstract [en]

Systemic lupus erythematosus is a systemic autoimmune disorder of unknown aetiology but is most likely caused by an interaction between several genetic factors and the environment. In a previously published genome scan we presented linkage to a marker on chromosome 4p13 in Icelandic families. Fine mapping of the region has been performed using 10 multicase families from Iceland and the maximum two-point LOD score was given by marker D4S2974 (Z = 3.57, alpha = 1). Multipoint analyses of the markers in the region suggest a putative disease gene to be located between markers D4S405 and D4S2381. The maximum multipoint LOD score (Z = 3.76) was given for marker D4S2974 in combination with the novel repeat GT4C2. A family-specific haplotype was segregating with the disease in each of eight families although a founder haplotype could not be identified. Analysis of recombination events in the patients delimited the susceptibility locus to approximately 3 cM. The susceptibility locus identified probably contains a mutation that has been enriched in the Icelandic population but is less common in other populations. We also show that this region is not identical to a susceptibility locus for SLE located on 4p16 where we detect no linkage.

Place, publisher, year, edition, pages
2006. Vol. 64, no 3, 308-313 p.
National Category
Medical and Health Sciences
URN: urn:nbn:se:uu:diva-10607DOI: 10.1111/j.1365-3083.2006.01810.xISI: 000239661500019PubMedID: 16918700OAI: oai:DiVA.org:uu-10607DiVA: diva2:38375
Available from: 2007-04-20 Created: 2007-04-20 Last updated: 2013-09-18Bibliographically approved
In thesis
1. Exploring the Genetics of SLE with Linkage and Association Analysis
Open this publication in new window or tab >>Exploring the Genetics of SLE with Linkage and Association Analysis
2004 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The aim with this thesis has been to identify genes involved in the pathogenesis of Systemic Lupus Erythematosus (SLE). SLE is a systemic autoimmune disorder, most likely caused by both several genetic and environmental factors.

In order to identify susceptibility loci for the disease we performed linkage analyses on data from 70 families of various ethnic origins. Significant linkage was found in two regions. One region (chromosome 17p12-q11) was linked to SLE in a set of Argentine families. Since the same region had been previously identified in several linkage studies on Multiple Sclerosis patients, we propose that this locus may contain a genetic variant that affects not only SLE, but also autoimmunity in general. The second locus is located on chromosome 4p14-13 and has only been identified in a set of Icelandic families. We suggest that this locus contains a mutation that has been enriched in the Icelandic population due to its population history.

The BCL2 gene has been suggested as a candidate gene for SLE. Three markers in this gene were investigated for association with the disease in two different populations. However, no association could be found with any of the markers or when these markers were analysed together as a haplotype. We conclude that the BCL2 gene is not associated with SLE in our material. This result contradicts previously published results of an association between BCL2 and SLE.

We suggest that the PD-1 pathway (involved in inhibition of T- and B-cell responses) is an important component in SLE pathogenesis. A regulatory variant in the PD-1 gene had previously been associated with SLE and here we show strong association (p<0.0001) to a haplotype containing SNPs in both PD-L1 and PD-L2.

Our results indicate that SLE is a disease caused by several genetic variations that differ between families and populations.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2004. 55 p.
Comprehensive Summaries of Uppsala Dissertations from the Faculty of Medicine, ISSN 0282-7476 ; 1365
Molecular genetics, Systemic lupus erythematosus, complex disease, linkage analysis, association analysis, Genetik
National Category
urn:nbn:se:uu:diva-4476 (URN)91-554-6010-0 (ISBN)
Public defence
2004-09-24, Rudbecksalen, Rudbeck laboratoriet, Dag Hammarskjöldsv 20, Uppsala, 13:15
Available from: 2004-09-01 Created: 2004-09-01 Last updated: 2013-09-18Bibliographically approved

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