Expression of functional IL-2 receptors on mature splenic dendritic cells
- PMID: 10820393
- DOI: 10.1002/(SICI)1521-4141(200005)30:5<1453::AID-IMMU1453>3.0.CO;2-W
Expression of functional IL-2 receptors on mature splenic dendritic cells
Abstract
We report here the expression of functional IL-2 receptor (IL-2R) on mature splenic dendritic cells (DC) and synergistic effect of IL-2 on IFN-gamma production by DC. IL-2 augmented IL-12-dependent IFN-gamma production by DC purified from both splenocytes of wild-type and anti-asialoGM1 Ab-treated Rag-2(-/-) splenocytes devoid of T, B, NK and NKT cells. A neutralizing mAb against IL-2Ralpha blocked such enhancing effect of IL-2 on IFN-gamma production, indicating the presence of functional IL-2R on DC. Synergistic effects of IL-2 were also observed on IFN-gamma production by DC stimulated through CD40 or MHC class II, suggesting that T cell-derived IL-2 can act on DC during antigen presentation. Furthermore, we provide evidence that DC produce IFN-gamma during interaction with allogeneic CD4(+) T cells from IFN-gamma(-/-) mice. These results suggest that IL-2 produced by naive T cells upon antigen stimulation is an important factor during Th0 to Th1 differentiation by inducing IFN-gamma from DC.
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