IL-18 Drives ILC3 Proliferation and Promotes IL-22 Production via NF-κB.

IL-18 Drives ILC3 Proliferation and Promotes IL-22 Production via NF-κB.
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DOI:
10.4049/jimmunol.1601554
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发表时间:
2017-10-01
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
通讯作者:
Yu J
Yu J
中科院分区:
其他
文献类型:
--
作者:
Victor AR;Nalin AP;Dong W;McClory S;Wei M;Mao C;Kladney RD;Youssef Y;Chan WK;Briercheck EL;Hughes T;Scoville SD;Pitarresi JR;Chen C;Manz S;Wu LC;Zhang J;Ostrowski MC;Freud AG;Leone GW;Caligiuri MA;Yu J

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第3组先天性淋巴细胞(ILC3s)是免疫系统的重要调节因子,在共生菌存在的情况下维持内稳态,但在应对微生物病原体时激活免疫防御。ILC3s是白细胞介素 - 22(IL - 22)的一个强大来源,IL - 22是一种对刺激抗菌反应至关重要的细胞因子。我们试图确定能够促进ILC3s增殖并诱导或维持其产生IL - 22的细胞因子,并确定这一过程的分子机制。我们发现白细胞介素 - 18(IL - 18)是一种与ILC3存活因子白细胞介素 - 15(IL - 15)协同作用的细胞因子,可诱导人ILC3s增殖以及诱导和维持IL - 22的产生。为了确定作用机制,我们研究了由IL - 18信号激活的核因子 - κB(NF - κB)通路。我们发现NF - κB复合物信号成分p65与IL22启动子的近端区域结合并促进转录活性。最后,我们观察到在人扁桃体原位中,表达IL - 18的CD11c⁺树突状细胞与ILC3s紧密相邻。因此,我们确定了人ILC3s增殖和产生IL - 22的一种新机制,并确定NF - κB是在以IL - 18和/或IL - 22过度产生为特征的病理状态中可考虑的潜在治疗靶点。
Group 3 innate lymphoid cells (ILC3s) are important regulators of the immune system, maintaining homeostasis in the presence of commensal bacteria, but activating immune defenses in response to microbial pathogens. ILC3s are a robust source of IL-22, a cytokine critical for stimulating the anti-microbial response. We sought to identify cytokines that can promote proliferation and induce or maintain IL-22 production by ILC3s and determine a molecular mechanism for this process. We identified IL-18 as a cytokine that cooperates with an ILC3 survival factor, IL-15, to induce proliferation of human ILC3s, as well as induce and maintain IL-22 production. To determine a mechanism of action, we examined the NF-κB pathway, which is activated by IL-18 signaling. We found that the NF-κB complex signaling component, p65, binds to the proximal region of the IL22 promoter and promotes transcriptional activity. Finally, we observed that CD11c+ dendritic cells expressing IL-18 are found in close proximity to ILC3s in human tonsils in situ. Therefore, we identify a new mechanism by which human ILC3s proliferate and produce IL-22, and identify NF-κB as a potential therapeutic target to be considered in pathologic states characterized by overproduction of IL-18 and/or IL-22.
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