DC activated via dectin-1 convert Treg into IL-17 producers.

DC activated via dectin-1 convert Treg into IL-17 producers.
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DOI:
10.1002/eji.200838950
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发表时间:
2008-12
影响因子:
5.4
通讯作者:
Reis e Sousa, Caetano
Reis e Sousa, Caetano
中科院分区:
医学3区
文献类型:
--
作者:
Osorio, Fabiola;LeibundGut-Landmann, Salome;Lochner, Matthias;Lahl, Katharina;Sparwasser, Tim;Eberl, Gerard;Reis e Sousa, Caetano
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产生IL-17的Th细胞在粘膜表面起促炎作用。在相同部位的Treg抑制炎症并防止免疫病理学。产生IL-17(Th 17)和Treg的Th细胞被认为是分别由转录因子ROR-γt和Foxp 3的表达定义的不同群体。在这里,我们表明小鼠CD 25 + Foxp 3 + Treg可以转化为以Foxp 3和ROR-γt的表达和IL-17的产生为特征的杂合T细胞群。在与DC共培养时观察到转化,所述DC通过dectin-1选择性活化,dectin-1是参与真菌识别的C型凝集素受体,并且依赖于DC产生的IL-23。在Foxp 3+群体中,只有Foxp 3 +ROR-γt+ T细胞而不是Foxp 3 +ROR-γt−-T细胞成为Foxp 3 +IL-17+ T细胞。这些结果表明,一些Foxp 3 + T细胞可以产生IL-17,同时保留Foxp 3表达,并表明Treg在某些情况下可能发挥意想不到的促炎作用。
Th cells producing IL-17 play a pro-inflammatory role at mucosal surfaces. Treg at the same sites dampen inflammation and prevent immunopathology. Th cells producing IL-17 (Th17) and Treg are thought to be distinct populations defined by expression of the transcription factors ROR-γt and Foxp3, respectively. Here, we show that mouse CD25+Foxp3+ Treg can be converted into a hybrid T-cell population characterized by the expression of Foxp3 and ROR-γt and the production of IL-17. Conversion was observed upon coculture with DC selectively activated via dectin-1, a C-type lectin receptor involved in fungal recognition, and depended on IL-23 produced by DC. Within the Foxp3+ population, only Foxp3+ROR-γt+ T cells but not Foxp3+ROR-γt−–T cells become Foxp3+IL-17+ T cells. These results indicate that some Foxp3+ T cells can produce IL-17 while retaining Foxp3 expression and suggest that Treg could play an unexpected pro-inflammatory role in some settings.
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