Targeted antigen delivery to DEC-205⁺ dendritic cells for tolerogenic vaccination.

Targeted antigen delivery to DEC-205⁺ dendritic cells for tolerogenic vaccination.
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将靶向抗原递送至 DEC-205⁺ 树突状细胞以进行耐受性疫苗接种。

DOI:
10.1900/rds.2012.9.305
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发表时间:
2012
期刊:
The review of diabetic studies : RDS
影响因子:
--
通讯作者:
Karsten Kretschmer
Karsten Kretschmer
中科院分区:
--
文献类型:
--
作者:
C. Petzold;S. Schallenberg;Joel N.H. Stern;Karsten Kretschmer

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树突状细胞(DC)和表达Foxp3的CD4Treg细胞在维持外周对自身抗原的耐受中发挥非冗余作用,从而防止致命性自身免疫。胸腺内和胸腺外Treg细胞谱系承诺的一个共同特征是诱导Foxp3表达,这是适当的T细胞受体与MHC II类:激动剂配体结合的结果。现在越来越清楚的是,未成熟DC在稳定状态下递呈激动剂配体,通过隐性和显性机制诱导T细胞耐受,而不是促进产生T辅助细胞反应。在此背景下,稳态树突状细胞促进最初幼稚的CD4Foxp3⁺⁻T细胞在胸腺外转化为Foxp3⁺Treg细胞的能力尤其令人感兴趣,因为它为在不想要的免疫的临床环境中增强抗原特异性Treg细胞功能提供了新的视角,如β细胞自身免疫。
Dendritic cells (DCs) and Foxp3-expressing CD4⁺ regulatory T (Treg) cells play non-redundant roles in the maintenance of peripheral tolerance to self-antigens, thereby preventing fatal autoimmunity. A common hallmark of intra- and extra-thymic Treg cell lineage commitment is the induction of Foxp3 expression as a consequence of appropriate T cell receptor engagement with MHC class II:agonist ligand. It has now become increasingly clear that agonist ligand presentation by immature DCs in the steady state induces T cell tolerance by both recessive and dominant mechanisms, rather than promoting productive T helper cell responses. In this context, the ability of steady-state DCs to promote the extrathymic conversion of initially naïve CD4⁺Foxp3⁻ T cells into Foxp3⁺ Treg cells is of particular interest as it provides novel perspectives to enhance antigen-specific Treg cell function in clinical settings of unwanted immunity, such as β-cell autoimmunity.
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