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1996-02-27
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Document 0478
DOCN M9630478
TI Are CD4+ Th1 cells pro-inflammatory or anti-inflammatory? The ratio of
IL-10 to IFN-gamma or IL-2 determines their function.
DT 9603
AU Katsikis PD; Cohen SB; Londei M; Feldmann M; Kennedy Institute of
Rheumatology, Sunley Division, London, UK.
SO Int Immunol. 1995 Aug;7(8):1287-94. Unique Identifier : AIDSLINE
MED/96022650
AB Human CD4+ T cells have, like their murine counterparts, been classified
on the basis of their cytokine profile. Th1 cells produce IL-2 and
IFN-gamma, but little or no IL-4. Th2 cells produce IL-4 but not
IFN-gamma or IL-2, and Th0 produce IL-2, IL-4 and IFN-gamma. As IL-2 is
the most potent T cell growth factor and IFN-gamma is the strongest
activator of macrophages it is not surprising that CD4+ Th1 cells are
considered to be pro-inflammatory. However, unlike results in the mouse,
where IL-10 is only produced by Th2 cells, human IL-10 is produced by
Th0, Th1 and Th2 cells. Hence some human Th1 cells are capable of
producing both pro-inflammatory (IL-2, IFN-gamma) and anti-inflammatory
(IL-10) cytokines, therefore the function of these cells may not be
accurately encapsulated by the 'Th1' terminology. We thus investigated
the correlation of cytokine production and function in human CD4+ Th1
clones. Cytokine production (IL-2, IFN-gamma, IL-10) was measured in
supernatants by ELISA after stimulation with solid-phase anti-CD3. The
capacity of these supernatants to activate or inhibit T cell
proliferation or LPS induced TNF-alpha production by monocytes was
assessed. The ratio of IL-2/IL-10 or IFN-gamma/IL-10 was of critical
importance in determining the function of the supernatants. The
inhibitory effects were verified to be due to IL-10, as they were
neutralized by anti-IL-10 mAb.(ABSTRACT TRUNCATED AT 250 WORDS)
DE Antibodies, Monoclonal/PHARMACOLOGY Antigens, CD3/IMMUNOLOGY Cell Line
Cell-Free System/IMMUNOLOGY Clone Cells Epitopes Human
Inflammation/*IMMUNOLOGY Interferon Type II/*BIOSYNTHESIS
Interleukin-10/*BIOSYNTHESIS/IMMUNOLOGY Interleukin-2/*BIOSYNTHESIS
Lipopolysaccharides/PHARMACOLOGY Lymphocyte Transformation/DRUG
EFFECTS/IMMUNOLOGY Macrophage Activation/DRUG EFFECTS Support,
Non-U.S. Gov't Th1 Cells/*CLASSIFICATION/IMMUNOLOGY/METABOLISM Tumor
Necrosis Factor/BIOSYNTHESIS JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).