Dendritic cells (DC) appear to play a major role in allergy development. In contrast to murine plasmacytoid DC, conventional DC (cDC) were functionally modulated by aqueous birch pollen extract (Bet.-APE) as well as some of the included pollen associated lipid mediators. However, this did not result in an altered T cell polarization in allogenic or antigen-specific co-cultures with T cells. An activating but nonpolarizing effect of modulated cDC on NKT cells could be shown. Bet.-APE exerted a net Th2 polarizing effect on NKT cells. Hence, NKT cells may contribute to the breaking of tolerance. So far, antigen-specific immunotherapy (IT) is the only effective and long-lasting therapy for type I allergies. The cytokine IL-10 is essential for an effective IT. In contrast to the hitherto existing hypothesis, it was shown that IL-10 producing cell populations other than T cells contribute to a successful IT.
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Dendritic cells (DC) appear to play a major role in allergy development. In contrast to murine plasmacytoid DC, conventional DC (cDC) were functionally modulated by aqueous birch pollen extract (Bet.-APE) as well as some of the included pollen associated lipid mediators. However, this did not result in an altered T cell polarization in allogenic or antigen-specific co-cultures with T cells. An activating but nonpolarizing effect of modulated cDC on NKT cells could be shown. Bet.-APE exerted a ne...
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