Title |
IFNγ Signaling Endows DCs with the Capacity to Control Type I Inflammation during Parasitic Infection through Promoting T-bet+ Regulatory T Cells
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Published in |
PLoS Pathogens, February 2015
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DOI | 10.1371/journal.ppat.1004635 |
Pubmed ID | |
Authors |
Hyang-Mi Lee, Anne Fleige, Ruth Forman, Sunglim Cho, Aly Azeem Khan, Ling-Li Lin, Duc T. Nguyen, Aisling O'Hara-Hall, Zhinan Yin, Christopher A. Hunter, Werner Muller, Li-Fan Lu |
Abstract |
IFNγ signaling drives dendritic cells (DCs) to promote type I T cell (Th1) immunity. Here, we show that activation of DCs by IFNγ is equally crucial for the differentiation of a population of T-bet+ regulatory T (Treg) cells specialized to inhibit Th1 immune responses. Conditional deletion of IFNγ receptor in DCs but not in Treg cells resulted in a severe defect in this specific Treg cell subset, leading to exacerbated immune pathology during parasitic infections. Mechanistically, IFNγ-unresponsive DCs failed to produce sufficient amount of IL-27, a cytokine required for optimal T-bet induction in Treg cells. Thus, IFNγ signalling endows DCs with the ability to efficiently control a specific type of T cell immunity through promoting a corresponding Treg cell population. |
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