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Dectin-1-activated dendritic cells trigger potent antitumour immunity through the induction of Th9 cells.
Nature Communications ( IF 14.7 ) Pub Date : 2016-08-05 , DOI: 10.1038/ncomms12368
Yinghua Zhao 1 , Xiao Chu 1 , Jintong Chen 1 , Ying Wang 1 , Sujun Gao 2 , Yuxue Jiang 1 , Xiaoqing Zhu 2 , Guangyun Tan 1 , Wenjie Zhao 3 , Huanfa Yi 3 , Honglin Xu 4 , Xingzhe Ma 5 , Yong Lu 5 , Qing Yi 1, 5 , Siqing Wang 1
Affiliation  

Dectin-1 signalling in dendritic cells (DCs) has an important role in triggering protective antifungal Th17 responses. However, whether dectin-1 directs DCs to prime antitumour Th9 cells remains unclear. Here, we show that DCs activated by dectin-1 agonists potently promote naive CD4(+) T cells to differentiate into Th9 cells. Abrogation of dectin-1 in DCs completely abolishes their Th9-polarizing capability in response to dectin-1 agonist curdlan. Notably, dectin-1 stimulation of DCs upregulates TNFSF15 and OX40L, which are essential for dectin-1-activated DC-induced Th9 cell priming. Mechanistically, dectin-1 activates Syk, Raf1 and NF-κB signalling pathways, resulting in increased p50 and RelB nuclear translocation and TNFSF15 and OX40L expression. Furthermore, immunization of tumour-bearing mice with dectin-1-activated DCs induces potent antitumour response that depends on Th9 cells and IL-9 induced by dectin-1-activated DCs in vivo. Our results identify dectin-1-activated DCs as a powerful inducer of Th9 cells and antitumour immunity and may have important clinical implications.

中文翻译:


Dectin-1 激活的树突状细胞通过诱导 Th9 细胞触发有效的抗肿瘤免疫。



树突状细胞 (DC) 中的 Dectin-1 信号传导在触发保护性抗真菌 Th17 反应中发挥重要作用。然而,dectin-1 是否引导树突状细胞诱导抗肿瘤 Th9 细胞仍不清楚。在这里,我们发现由dectin-1激动剂激活的DC能够有效促进幼稚CD4(+) T细胞分化为Th9细胞。消除 DC 中的 dectin-1 会完全消除其响应 dectin-1 激动剂凝胶多糖的 Th9 极化能力。值得注意的是,dectin-1 对 DC 的刺激会上调 TNFSF15 和 OX40L,这对于 dectin-1 激活的 DC 诱导的 Th9 细胞启动至关重要。从机制上讲,dectin-1 激活 Syk、Raf1 和 NF-κB 信号通路,导致 p50 和 RelB 核易位以及 TNFSF15 和 OX40L 表达增加。此外,用 dectin-1 激活的 DC 免疫荷瘤小鼠可诱导有效的抗肿瘤反应,该反应依赖于 dectin-1 激活的 DC 在体内诱导的 Th9 细胞和 IL-9。我们的结果表明,dectin-1 激活的 DC 是 Th9 细胞和抗肿瘤免疫的强大诱导剂,可能具有重要的临床意义。
更新日期:2016-08-08
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