Microparticles bearing encephalitogenic peptides induce T-cell tolerance and ameliorate experimental autoimmune encephalomyelitis.

Microparticles bearing encephalitogenic peptides induce T-cell tolerance and ameliorate experimental autoimmune encephalomyelitis.
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DOI:
10.1038/nbt.2434
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发表时间:
2012-12
影响因子:
46.9
通讯作者:
--
中科院分区:
工程技术1区
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--
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异常的T细胞激活是许多自身免疫性疾病的基础,然而大多数诱导T细胞耐受的尝试都失败了。基于先前利用清除凋亡碎片的自然机制进行耐受诱导的策略,我们发现抗原修饰的微粒(直径500纳米)可在患有复发性实验性自身免疫性脑脊髓炎的小鼠中诱导长期的T细胞耐受。具体而言,静脉输注携带致脑炎肽的聚苯乙烯或可生物降解的聚(丙交酯 - 乙交酯)微粒可预防疾病发作并改变疾病进程。这些有益效果需要表达清道夫受体MARCO的边缘区巨噬细胞摄取微粒,并且部分由调节性T细胞的活性、T细胞激活失败和T细胞无能所介导。总之,这些数据强调了利用微粒靶向自然凋亡清除途径以使致病性T细胞失活并阻止自身免疫疾病进程的潜力。
Aberrant T-cell activation underlies many autoimmune disorders, yet most attempts to induce T-cell tolerance have failed. Building on previous strategies for tolerance induction that exploited natural mechanisms for clearing apoptotic debris, we show that antigen-decorated microparticles (500-nm diameter) induce long-term T-cell tolerance in mice with relapsing experimental autoimmune encephalomyelitis. Specifically, intravenous infusion of either polystyrene or biodegradable poly(lactide-co-glycolide) microparticles bearing encephalitogenic peptides prevents the onset and modifies the course of the disease. These beneficial effects require microparticle uptake by marginal zone macrophages expressing the scavenger receptor MARCO and are mediated in part by the activity of regulatory T cells, abortive T-cell activation and T-cell anergy. Together these data highlight the potential for using microparticles to target natural apoptotic clearance pathways to inactivate pathogenic T cells and halt the disease process in autoimmunity.
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