Requirement for diverse TCR specificities determines regulatory T cell activity in a mouse model of autoimmune arthritis.

Requirement for diverse TCR specificities determines regulatory T cell activity in a mouse model of autoimmune arthritis.
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对TCR特异性的需求决定了自身免疫性关节炎小鼠模型中的调节T细胞活性。

DOI:
10.4049/jimmunol.1103598
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发表时间:
2012-05-01
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
通讯作者:
Caton AJ
Caton AJ
中科院分区:
其他
文献类型:
--
作者:
Oh S;Aitken M;Simons DM;Basehoar A;Garcia V;Kropf E;Caton AJ

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CD4+CD25+Foxp3+调节性T细胞(Tregs)是抑制免疫系统产生自身侵袭性全身炎症反应所必需的,但是为什么它们的活性可以阻止(或允许)器官特异性自身免疫仍然知之甚少。我们使用自发性自身免疫性关节炎小鼠模型研究了TCR特异性如何促进Treg活性,在该模型中,表达克隆型TCR的CD4+ T细胞通过il -17依赖机制诱导疾病。多克隆Tregs抑制Th17细胞形成,阻止关节炎发展;值得注意的是,表达克隆型TCR的treg没有。这些克隆型Tregs在体内使用克隆型TCR对效应CD4+ T细胞进行抗原特异性抑制,但不能介导旁观者抑制,也不能阻止使用非克隆型TCR的Th17细胞在关节炎小鼠关节引流淋巴结中积聚。这些研究表明,具有不同TCR特异性的Tregs的可用性对其在自身免疫性关节炎中的活性至关重要。
CD4+CD25+Foxp3+ regulatory T cells (Tregs) are required to restrain the immune system from mounting an autoaggressive systemic inflammatory response, but why their activity can prevent (or allow) organ-specific autoimmunity remains poorly understood. We have examined how TCR specificity contributes to Treg activity using a mouse model of spontaneous autoimmune arthritis, in which CD4+ T cells expressing a clonotypic TCR induce disease by an IL-17-dependent mechanism. Administration of polyclonal Tregs suppressed Th17 cell formation and prevented arthritis development; notably, Tregs expressing the clonotypic TCR did not. These clonotypic Tregs exerted antigen-specific suppression of effector CD4+ T cells using the clonotypic TCR in vivo, but failed to mediate bystander suppression and did not prevent Th17 cells using nonclonotypic TCRs from accumulating in joint-draining lymph nodes of arthritic mice. These studies indicate that the availability of Tregs with diverse TCR specificities can be crucial to their activity in autoimmune arthritis.
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