Protection against Th17 cells differentiation by an interleukin-23 receptor cytokine-binding homology region.

Protection against Th17 cells differentiation by an interleukin-23 receptor cytokine-binding homology region.
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Interleukin-23 受体细胞因子结合同源区域防止 Th17 细胞分化

DOI:
10.1371/journal.pone.0045625
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发表时间:
2012
期刊:
影响因子:
3.7
通讯作者:
Yao W
Yao W
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Guo W;Luo C;Wang C;Zhu Y;Wang X;Gao X;Yao W

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据报道,Th17 细胞可产生促炎细胞因子,如白细胞介素 17、IL-22,并被认为是各种炎症疾病的重要参与者。 IL-23是IL-12细胞因子家族细胞因子之一,由p19和p40亚基组成,以其促进Th17发育和IL-17产生的潜力而闻名,IL-23/IL-17途径被认为是自身免疫炎症反应的潜在治疗靶点。缺乏 IL-23 或 IL-17 相关基因的敲除小鼠可以抑制过敏反应。正在体外或体内评估几种 IL-23 或 IL-17 中和剂破坏 IL-23/IL-17 轴的作用。在此,我们报道原核表达的可溶性IL-23受体细胞因子结合同源区作为内源性细胞外受体类似物可能是IL-23/IL-17轴的天然拮抗剂。我们提供的证据表明,IL23R-CHR 可以在体外以剂量依赖性方式与 IL-23 结合,并通过 IL23R-CHR 阻断 IL-23 信号,降低 RORγt 表达,进而降低 IL-17/IL-22 的表达,从而保护幼稚 CD4+ T 细胞免受 Th17 发育的影响。总之,这项研究表明了 IL-23 通路在 Th17 发育中的重要性以及 IL23R-CHR 对 Th17 发育的负调节,并强调了可溶性受体胞外区域在中和 IL-23 治疗策略中的重要作用。
Th17 cells have been reported to produce proinflammatory cytokines like Interleukin-17, IL-22, and regarded as important players in various inflammatory diseases. One of the IL-12 cytokine family cytokines, IL-23, composed of p19 and p40 subunit, is known for its potential to promote Th17 development and IL-17 producing, and the IL-23/IL-17 pathway is considered to be potential therapeutic target for autoimmune inflammation responses. Knockout mice deficient in either IL-23 or IL-17 related genes can suppress the allergic responses. Several IL-23 or IL-17 neutralizing agents are being evaluated in vitro or in vivo to disrupt the IL-23/IL-17 axis. Herein, we report that prokaryotically expressed soluble IL-23 receptor cytokine-binding homology region as an endogenous extracellular receptor analogue could be a natural antagonist against IL-23/IL-17 axis. We provide evidence that IL23R-CHR can bind to IL-23 in a dose-dependent manner in vitro, and block IL-23 signal by IL23R-CHR reducing the RORγt expression, which in turn lowers the expression of IL-17/IL-22, thus protecting naive CD4+ T cells against Th17 development. Together, this study indicates the importance of IL-23 pathway in Th17 development and the negative regulation of Th17 development by IL23R-CHR, and highlights the important roles of the soluble receptor extracellular region in the therapeutic strategy of neutralizing IL-23.
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