Induction of Peripheral Tolerance in Ongoing Autoimmune Inflammation Requires Interleukin 27 Signaling in Dendritic Cells.

Induction of Peripheral Tolerance in Ongoing Autoimmune Inflammation Requires Interleukin 27 Signaling in Dendritic Cells.
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DOI:
10.3389/fimmu.2017.01392
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发表时间:
2017
影响因子:
7.3
通讯作者:
Rostami AM
Rostami AM
中科院分区:
医学2区
文献类型:
--
作者:
Thomé R;Moore JN;Mari ER;Rasouli J;Hwang D;Yoshimura S;Ciric B;Zhang GX;Rostami AM

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通过抑制自身反应性淋巴细胞、刺激致耐受性树突状细胞(DC)和调节性T(Treg)细胞来诱导对自身抗原的外周耐受。白细胞介素(IL)-27诱导致耐受性DC和Treg细胞;然而,尚不清楚IL-27对于耐受性诱导是否重要。我们用MOG 35 -55免疫野生型(WT)和IL-27受体(WSX-1)敲除小鼠以诱导实验性自身免疫性脑脊髓炎,并静脉内(i. v.)在发病后给它们注射MOG 35 -55以诱导静脉内耐受。静脉注射MOG 35 -55可降低WT小鼠的疾病严重程度,但对Wsx−/−小鼠无效。DC中的IL-27信号传导对于耐受诱导是重要的,而其在T细胞中的信号传导不是。进一步的机制研究表明,IL-27依赖性耐受依赖于脾DC的不同亚群与诱导T细胞衍生的IL-10和IFN-γ的能力的合作。总体而言,我们的数据表明,IL-27是抗原诱导的外周耐受中的关键细胞因子,并可能为改善多发性硬化症和其他自身免疫性疾病的抗原特异性耐受方法提供基础。
Peripheral tolerance to autoantigens is induced via suppression of self-reactive lymphocytes, stimulation of tolerogenic dendritic cells (DCs) and regulatory T (Treg) cells. Interleukin (IL)-27 induces tolerogenic DCs and Treg cells; however, it is not known whether IL-27 is important for tolerance induction. We immunized wild-type (WT) and IL-27 receptor (WSX-1) knockout mice with MOG35–55 for induction of experimental autoimmune encephalomyelitis and intravenously (i.v.) injected them with MOG35–55 after onset of disease to induce i.v. tolerance. i.v. administration of MOG35–55 reduced disease severity in WT mice, but was ineffective in Wsx−/− mice. IL-27 signaling in DCs was important for tolerance induction, whereas its signaling in T cells was not. Further mechanistic studies showed that IL-27-dependent tolerance relied on cooperation of distinct subsets of spleen DCs with the ability to induce T cell-derived IL-10 and IFN-γ. Overall, our data show that IL-27 is a key cytokine in antigen-induced peripheral tolerance and may provide basis for improvement of antigen-specific tolerance approaches in multiple sclerosis and other autoimmune diseases.
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