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Lower expression le...
Lower expression levels of the programmed death 1 receptor on CD4+CD25+ T cells and correlation with the PD-1.3A genotype in patients with systemic lupus erythematosus
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- Kristjánsdóttir, Helga, 1966- (author)
- Uppsala universitet,Medicinsk genetik,Genetics of inflammatory diseases
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Steinsson, Kristjan (author)
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- Gunnarsson, Iva (author)
- Karolinska Institutet
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Gröndal, Gerdur (author)
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Erlendsson, Kristjan (author)
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- Alarcón-Riquelme, Marta E. (author)
- Uppsala universitet,Medicinsk genetik
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(creator_code:org_t)
- 2010-02-22
- 2010
- English.
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In: Arthritis and Rheumatism. - : Wiley. - 0004-3591 .- 1529-0131. ; 62:6, s. 1702-1711
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Abstract
Subject headings
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- OBJECTIVE.: A genetic polymorphism, PD1.3A, in the PDCD1 gene encoding the co-inhibitory immunoreceptor PD-1, has been associated with SLE. The aim of the study was to assess PD-1 receptor expression in SLE patients, relatives and controls and correlate with PD-1.3A. METHODS.: Icelandic and Swedish SLE patients, relatives and controls were studied. PBMCs were stimulated with alphaCD3/CD28 and PD-1 expression analyzed by flow cytometry. PD-1.3A/G genotyping was performed by PCR-RFLP. RESULTS: I. PD-1 expression on PBMCs was induced after stimulation, by 2.1-fold in SLE patients, 3.1-fold in relatives and 5.1-fold in controls.II. The frequency of PD-1+ cells was significantly lower in SLE patients compared to relatives and controls. PD-1 expression on PD-1+ cells was significantly lower in SLE patients and relatives.III. PD-1 expression on CD4+CD25+ T cells was significantly lower in SLE patients and relatives.IV. PD-1 expression was significantly higher on CD25(high) compared to CD25(intermediate) and (low) cells.V. PD-1 expression on CD25(high) and CD25(intermediate) cells was significantly lower in SLE patients compared to controls.VI. PD-1 was expressed on both FoxP3- and FoxP3+ cells.VII. Lower PD-1 expression was significantly correlated with the PD-1.3A/G genotype. CONCLUSION.: The study demonstrates significantly lower PD-1 receptor expression in SLE patients and relatives and a significant correlation of lower PD-1 expression with the PD-1.3A allele. We conclude that PD-1.3A may be contributory to abnormalities in PD-1 receptor expression on CD4+CD25+ T-cells in SLE, providing support for an important role for the PD-1 pathway in SLE and possibly other autoimmune diseases.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper -- Immunologi inom det medicinska området (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Basic Medicine -- Immunology in the medical area (hsv//eng)
Keyword
- SLE
- PD-1.3A
- self-tolerance
- Immunology
- Immunologi
- Immunologi
- Immunology
Publication and Content Type
- ref (subject category)
- art (subject category)
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