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. 1992 Sep;60(9):3904–3908. doi: 10.1128/iai.60.9.3904-3908.1992

Interleukin-2 receptors in experimental Chagas' disease.

D R Pakianathan 1, R E Kuhn 1
PMCID: PMC257406  PMID: 1500197

Abstract

Mammals infected with the protozoan parasite Trypanosoma cruzi develop suppressed cellular and humoral immune responses. This immunosuppression has been correlated with reduced T-cell responses involving deficient interleukin-2 (IL-2) production and is apparently mediated primarily by suppressor macrophages. Various forms of immunosuppression in other systems have been associated with increased levels of soluble IL-2 receptors (sIL-2R), and in the present study levels of sIL-2R in the sera of T. cruzi-infected mice during the course of infection were examined in enzyme-linked immunosorbent assays. It was found that serum levels of sIL-2R were elevated only during the third week of acute infection, a time of intense immunosuppression. In addition, IL-2R on the surface of T cells were examined by flow cytometric analyses to determine whether there is an alteration in the number of IL-2R-positive cells and whether there is a change in expression of these receptors as infection progresses. The results revealed no significant change in the percentage of cells expressing IL-2R, nor did T cells become suppressed in their ability to express IL-2R in response to concanavalin A during the course of infection.

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Selected References

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