PMID: 2096080Jan 1, 1990Paper

Cell-mediated immunity: role of IL-3 and IL-6 in the regulation of contact sensitivity reaction

Folia Histochemica Et Cytobiologica
J Marcinkiewicz

Abstract

Delayed type hypersensitivity reaction (DTH) consists of a sequential cascade of steps depending on different types of T cells, as well as mast cells, endothelial cells and macrophages. Recently it has been shown that CD4+ TH1 lymphocytes ("inflammatory type") play a central role in DTH reaction. Activated TH1 cells produce a characteristic pattern of cytokines: IL-2, IL-3, TNF-beta, IFN-gamma. Using the contact sensitivity (CS) reaction on mice as a model system, the role of cytokines in the regulation of DTH is presented, particularly the significance of IL-3 and IL-6. The recent data can be interpreted to show that IL-6 released by activated macrophages (APC cells) in the induction phase of the CS reaction probably stimulate CD8+ T suppressor cells. These in turn inhibit the production of IL-2 and IL-3 by CD4+ TH1 cells followed by a state of unresponsiveness.

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