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© Research
Publication : Scandinavian journal of immunology

Endogenous IL-10 and IFN-gamma production controls thymic cell proliferation in mice acutely infected by Trypanosoma cruzi

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Scandinavian journal of immunology - 01 Jan 1994

Leite de Moraes MD, Minoprio P, Dy M, Dardenne M, Savino W, Hontebeyrie-Joskowicz M

Link to Pubmed [PMID] – 8290893

Scand. J. Immunol. 1994 Jan;39(1):51-8

Thymocytes from mice with experimental Trypanosoma cruzi infection respond poorly to Con-A stimulation. However, the proliferative capacity of these cells is not impaired, as demonstrated by the fact that at high doses, exogenous rIL-2 restores thymidine uptake. This finding could be explained either by insufficient IL-2 production or by the appearance of inhibitory factors during T. cruzi infection. This paper shows that in response to Con A, IL-2 production is decreased in the model. Furthermore, the whole profile of cytokine production is modified, with a striking increase in IL-10, IFN-gamma, IL-4, IL-5 and IL-6 production. The results indicate that IL-10 plus IFN-gamma are responsible for the decrease in the Con A-induced proliferation since a normal proliferative response as well as normal IL-2 production can be restored if both cytokines are neutralized by adding their monoclonal antibodies (MoAbs). Evidence is provided also for an enhanced non-specific cytotoxicity of thymic cells from infected mice that might involve IL-4, IL-5 and IL-6. This is the first study demonstrating an alteration of thymic cell function by T. cruzi infection which results from overstimulation of IL-10 and IFN-gamma production.

http://www.ncbi.nlm.nih.gov/pubmed/8290893