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Document 0177
DOCN M9650177
TI Sequential production of Th1 and Th2 cytokines in response to live
bacillus Calmette-Guerin.
DT 9605
AU Sander B; Skansen-Saphir U; Damm O; Hakansson L; Andersson J; Andersson
U; Department of Pathology, Faculty of Health Sciences, University; of
Linkoping, Sweden.
SO Immunology. 1995 Dec;86(4):512-8. Unique Identifier : AIDSLINE
MED/96165025
AB Causes of individual variation in susceptibility to mycobacterial
diseases are only partly understood. An efficient cell-mediated immune
response is crucial for resistance. Macrophages and T cells interact to
eliminate the mycobacteria, partially through the effects of secreted
cytokines. A vigorous anti-bacterial inflammatory response is sometimes
accompanied by severe tissue damage, while immunosuppression leads to
progressive infection. Here, live, attenuated Mycobacterium bovis,
bacillus Calmette-Guerin (BCG), was used as a model antigen to study
cytokine production at the single-cell level in response to
mycobacteria. Peripheral blood mononuclear cells from healthy
individuals were challenged in vitro and the kinetics and frequencies of
cytokine-producing cells were studied by immunofluorescent visualization
of intracellular cytokines. Fourteen cytokines were assayed;
interleukin-1 alpha (IL-1 alpha), IL-1 beta, IL-1 receptor antagonist
(IL-1ra), IL-2, IL-3, IL-4, IL-5, IL-6, IL-8, IL-10, interferon-gamma
(IFN-gamma), tumour necrosis factor-alpha (TNF-alpha), TNF-beta and
granulocyte-macrophage colony-stimulating factor (GM-CSF). A sequential
production of T helper-1 (Th1) and T helper-2 (Th2) cytokines was
induced by BCG. Early, at days 1-2 after stimulation, the response was
dominated by monokines and a low IFN-gamma and TNF-beta production. At
days 4-5 there was a marked production of Th1 lymphokines, with
approximately 6% IFN-gamma+ cells, 4% TNF-beta+ cells and 2% IL-2+
cells. Late in the reaction, at days 10-12, a Th2 response with IL-4,
IL-5 and IL-10 was detected, while the synthesis of Th1 lymphokines and
monokines declined. Overall, our results provide further evidence of
IFN-gamma as the major cytokine induced by mycobacteria in healthy
individuals, but also suggest that Th2 cytokines participate in the
response.
DE Adult Antigens, Bacterial/*IMMUNOLOGY Cell Culture
Cytokines/*BIOSYNTHESIS Down-Regulation (Physiology) Fluorescent
Antibody Technique Human Interleukins/BIOSYNTHESIS Kinetics
Mycobacterium bovis/*IMMUNOLOGY Sialoglycoproteins/BIOSYNTHESIS
Support, Non-U.S. Gov't Th1 Cells/*IMMUNOLOGY Th2 Cells/*IMMUNOLOGY
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).