alexa Critical role of interleukin-2 in the development of acute graft-versus-host disease.
Genetics & Molecular Biology

Genetics & Molecular Biology

Journal of Stem Cell Research & Therapy

Author(s): Via CS, Finkelman FD

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Abstract Prior work using the parent-into-F1 model of graft-versus-host disease (GVHD) has shown that production of IL-2 by donor CD4+ T cells is an early, initiating event in either acute or stimulatory forms of GVHD. The aim of the present study was to determine whether acute GVHD could be prevented by blocking the effects of IL-2 in vivo during the first 2 weeks of disease. Acute GVHD was induced in B6D2F1 mice by the injection of C57BL/6 spleen cells i.v. Mice were untreated or received either anti-IL-2 mAb (S4B6) or control mAb at the time of GVHD induction and 1 week later. At 2 weeks, untreated or control mAb treated GVHD mice exhibited findings typical of acute GVHD, i.e. (i) in vitro donor anti-host cytotoxic T lymphocyte (CTL) activity, (ii) significant reductions in both numbers and function of splenic lymphocytes, and (iii) in vitro suppressor cell activity which profoundly blocked IL-2 production by normal syngeneic spleen cells. All of these findings were reversed or significantly inhibited in acute GVHD mice receiving anti-IL-2 treatment. Additionally, anti-IL-2 treated GVHD mice exhibited features previously observed in stimulatory GVHD such as: (i) B cell hyperactivity, (ii) a mild defect in CD4+ T cell production of IL-2 in vitro, and (iii) the ability to induce in co-culture a similar CD4+ cell defect in normal, syngeneic F1 spleen cells.(ABSTRACT TRUNCATED AT 250 WORDS)
This article was published in Int Immunol and referenced in Journal of Stem Cell Research & Therapy

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