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HLA-DRB1*04/*13 alleles are associated with vascular disease and antiphospholipid antibodies in systemic lupus erythematosus
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences, Rheumatology. (Systemisk Autoimmunitet)
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2013 (English)In: Annals of the Rheumatic Diseases, ISSN 0003-4967, E-ISSN 1468-2060, Vol. 72, no 6, 1018-1025 p.Article in journal (Refereed) Published
Abstract [en]

BACKGROUND AND OBJECTIVES:

Vascular disease is common in systemic lupus erythematosus (SLE) and patients with antiphospholipid antibodies (aPL) are at high risk to develop arterial and venous thrombosis. Since HLA class II genotypes have been linked to the presence of pro-thrombotic aPL, we investigated the relationship between HLA-DRB1 alleles, aPL and vascular events in SLE patients.

METHODS:

665 SLE patients of Caucasian origin and 1403 controls were included. Previous manifestations of ischaemic heart disease, ischaemic cerebrovascular disease (ICVD) and venous thromboembolism (together referred to as any vascular events (AVE)) were tabulated. aPL were measured with ELISA. Two-digit HLA-DRB1 typing was performed by sequence-specific primer-PCR.

RESULTS:

HLA-DRB1*04 was more frequent among SLE patients with ICVD compared to unaffected patients. This association remained after adjustment for known traditional cardiovascular risk factors. HLA-DRB1*13 was associated with AVE. All measured specificities of aPL—cardiolipin IgG and IgM, β2-glycoprotein-1 IgG, prothrombin (PT) IgG and a positive lupus anticoagulant test were associated with HLA-DRB1*04—while HLA-DRB1*13 was associated with IgG antibodies (β2-glycoprotein-1, cardiolipin and PT). In patients with the combined risk alleles, HLA-DRB1*04/*13, there was a significant additive interaction for the outcomes AVE and ICVD.

CONCLUSIONS:

The HLA-DRB1*04 and HLA-DRB1*13 alleles are associated with vascular events and an aPL positive immune-phenotype in SLE. Results demonstrate that a subset of SLE patients is genetically disposed to vascular vulnerability.

Place, publisher, year, edition, pages
2013. Vol. 72, no 6, 1018-1025 p.
National Category
Medical and Health Sciences
Identifiers
URN: urn:nbn:se:uu:diva-180179DOI: 10.1136/annrheumdis-2012-201760ISI: 000318907100043PubMedID: 22893315OAI: oai:DiVA.org:uu-180179DiVA: diva2:548648
Available from: 2012-08-31 Created: 2012-08-31 Last updated: 2017-12-07Bibliographically approved

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Leonard, DagNordmark, GunnelSandling, Johanna KSyvänen, Ann-ChristineRönnblom, Lars

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