Abnormalities of CD4 T cell subpopulations in ANCA-associated vasculitis
In patients with ANCA-associated vasculitis (AAV), CD25 expression is increased on circulating T cells. Although in animal experiments the role of CD4(+) CD25(+) T-regulatory-cells (T(reg)) in protection against autoimmunity is well established, the role of these cells in AAV is unknown. To investig...
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| Hauptverfasser: | , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
2005
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| In: |
Clinical & experimental immunology
Year: 2005, Jahrgang: 140, Heft: 1, Pages: 181-191 |
| ISSN: | 1365-2249 |
| DOI: | 10.1111/j.1365-2249.2005.02731.x |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1111/j.1365-2249.2005.02731.x Verlag, lizenzpflichtig, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1365-2249.2005.02731.x 
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| Verfasserangaben: | S. Marinaki, I. Neumann, A.-I. Kälsch, P. Grimminger, A. Breedijk, R. Birck, W. Schmitt, R. Waldherr, B.A. Yard and F.J. Van Der Woude |
MARC
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| 245 | 1 | 0 | |a Abnormalities of CD4 T cell subpopulations in ANCA-associated vasculitis |c S. Marinaki, I. Neumann, A.-I. Kälsch, P. Grimminger, A. Breedijk, R. Birck, W. Schmitt, R. Waldherr, B.A. Yard and F.J. Van Der Woude |
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| 520 | |a In patients with ANCA-associated vasculitis (AAV), CD25 expression is increased on circulating T cells. Although in animal experiments the role of CD4(+) CD25(+) T-regulatory-cells (T(reg)) in protection against autoimmunity is well established, the role of these cells in AAV is unknown. To investigate the hypothesis that an increased expression of CD25 on T cells is related to persistent T cell activation and not to disturbances in T(reg) cells in AAV (34 patients, six of them after renal transplantation), we investigated CD25 expression in different subpopulations of CD4(+) cells and FOXP3 mRNA expression by reverse transcription-polymerase chain reaction (RT-PCR). In addition, T cell proliferation and cytokine secretion after stimulation with anti-CD3 and anti-CD28 and intracellular cytokine production after stimulation with phorbol myristate acetate (PMA)-ionomycin was determined. Controls were non-vasculitic renal transplant patients (n = 9) and healthy controls (HC) (n = 13). In AAV the total number of lymphocytes, CD4(+) lymphocytes and the percentage of naive T cells are lower than in HC and RTX. An increased percentage of CD25(+) cells was found in AAV and AAV/RTX, irrespective of disease activity, but not in HC or RTX. This was confined to the naive (CD4(+) CD45RB(high)) population only. FOXP3 mRNA expression in CD4(+) T cells did not differ between AAV patients and healthy controls. In vitro T cell proliferation was enhanced in AAV patients compared to HC (P < 0.01). PBMC of AAV patients produced significantly less interleukin (IL)-10 and interferon (IFN)-gamma after anti-CD3/CD28 stimulation. The percentage of IL-10 and IL-12, but not IFN-gamma, IL-4 or tumour necrosis factor (TNF)-alpha-producing cells was significantly higher in patients compared to HC. These findings were confined to the memory population of CD4(+) cells. We conclude that AAV patients are lymphopenic and have low numbers of CD4(+) T cells, which seem to be in a persistent state of activation. | ||
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| 650 | 4 | |a Aged | |
| 650 | 4 | |a Aged, 80 and over | |
| 650 | 4 | |a Antibodies, Antineutrophil Cytoplasmic | |
| 650 | 4 | |a CD4-Positive T-Lymphocytes | |
| 650 | 4 | |a Cells, Cultured | |
| 650 | 4 | |a DNA-Binding Proteins | |
| 650 | 4 | |a Female | |
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| 650 | 4 | |a Humans | |
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| 650 | 4 | |a Interferon-gamma | |
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