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Over-expression of ...
Over-expression of interleukin 10 in mucosal T cells of patients with active ulcerative colitis.
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Melgar, S (author)
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Yeung, M M-W (author)
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Bas, A (author)
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Forsberg, G (author)
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Suhr, O (author)
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Oberg, A (author)
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- Hammarström, Sten (author)
- Umeå universitet,Immunologi/immunkemi
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Danielsson, A (author)
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- Hammarström, Marie-Louise (author)
- Umeå universitet,Immunologi/immunkemi
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(creator_code:org_t)
- 2003
- 2003
- English.
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In: Clinical and Experimental Immunology. - 0009-9104 .- 1365-2249. ; 134:1, s. 127-37
- Related links:
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https://urn.kb.se/re...
Abstract
Subject headings
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- Ulcerative colitis (UC), a chronic inflammatory bowel disease, exhibits pronounced increase of T lymphocytes in the inflamed mucosa. To understand the role of intestinal T lymphocytes in the pathogenesis of UC their cytokine production in the mucosa was analysed. Intestinal T lymphocytes of UC, Crohn's disease and control patients were analysed for cytokine mRNA levels by real-time quantitative reverse transcription-polymerase chain reaction (RT-PCR) directly after isolation without in vitro stimulation. Frequencies of cytokine positive cells were determined in UC and control colon by immunomorphometry. T lymphocytes in normal colon expressed interleukin (IL)-2, interferon (IFN)-gamma, tumour necrosis factor (TNF)-alpha and transforming growth factor (TGF)-beta1, but not IL-4, IL-5 or IL-10. In UC, a highly significant increase in IL-10 mRNA levels in T lymphocytes and an increased frequency of IL-10 positive cells was seen in colon. IL-10 mRNA levels were also elevated in T lymphocytes of the non-inflamed ileum and correlated with disease activity at both locations. CD4+ T lymphocytes were the major source of IL-10 mRNA. IL-2, IFN-gamma and TNF-alpha mRNA levels were decreased in colonic T lymphocytes, and virtually no IL-2, IFN-gamma, TNF-alpha or TGF-beta positive cells were detected in basal lymphoid aggregates. However, scattered IL-10 positive cells were found here. Lamina propria outside the aggregates contained IL-10-, IFN-gamma, TNF-alpha and TGF-beta but not IL-2 positive cells. T cells of UC patients did not express IL-4 or IL-5. Taken, together the data suggest a generalized activation of IL-10 producing CD4+ T cells along the intestine of UC patients. The local environment seems to determine the biological consequences of elevated IL-10.
Subject headings
- NATURVETENSKAP -- Biologi -- Immunologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Immunology (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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