TSLP-activated dendritic cells induce an inflammatory T helper type 2 cell response through OX40 ligand.

TSLP-activated dendritic cells induce an inflammatory T helper type 2 cell response through OX40 ligand.
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DOI:
10.1084/jem.20051135
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发表时间:
2005-11-07
期刊:
The Journal of experimental medicine
影响因子:
--
通讯作者:
Liu YJ
Liu YJ
中科院分区:
其他
文献类型:
--
作者:
Ito T;Wang YH;Duramad O;Hori T;Delespesse GJ;Watanabe N;Qin FX;Yao Z;Cao W;Liu YJ

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我们最近发现,由胸腺基质淋巴生成素(TSLP)激活的树突状细胞(DC)可以刺激初始的CD_4+T细胞分化为辅助性T细胞2型(TH2),从而产生大量的肿瘤坏死因子-α(TWF-α),但不产生白介素10(IL-10)。在此,我们报道了TSLP诱导人DC表达OX40配体(OX40L),而不是IL-12。TSLP诱导DC表面的OX40L是触发初始的CD4+T细胞产生IL-4、-5和-13所必需的。我们进一步揭示了OX40L的三个新的功能特性:(A)OX40L选择性地促进肿瘤坏死因子-α,但抑制发育中的Th2细胞产生IL-10;(B)在存在IL-12的情况下,OX40L失去了极化Th2细胞的能力;以及(C)OX40L通过促进肿瘤坏死因子-α,同时抑制IL-10,加重了IL-12诱导的Th1细胞炎症。我们的结论是,OX40L可以在没有IL-12的情况下,在TSLP激活的DC上触发Th2细胞极化,并认为OX40L可以将产生IL-10的调节性Th细胞反应转换为产生肿瘤坏死因子-α的炎性Th细胞反应。
We recently showed that dendritic cells (DCs) activated by thymic stromal lymphopoietin (TSLP) prime naive CD4+ T cells to differentiate into T helper type 2 (Th2) cells that produced high amounts of tumor necrosis factor-α (TNF-α), but no interleukin (IL)-10. Here we report that TSLP induced human DCs to express OX40 ligand (OX40L) but not IL-12. TSLP-induced OX40L on DCs was required for triggering naive CD4+ T cells to produce IL-4, -5, and -13. We further revealed the following three novel functional properties of OX40L: (a) OX40L selectively promoted TNF-α, but inhibited IL-10 production in developing Th2 cells; (b) OX40L lost the ability to polarize Th2 cells in the presence of IL-12; and (c) OX40L exacerbated IL-12–induced Th1 cell inflammation by promoting TNF-α, while inhibiting IL-10. We conclude that OX40L on TSLP-activated DCs triggers Th2 cell polarization in the absence of IL-12, and propose that OX40L can switch IL-10–producing regulatory Th cell responses into TNF-α–producing inflammatory Th cell responses.
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