Migratory and lymphoid-resident dendritic cells cooperate to efficiently prime naive CD4 T cells.

Migratory and lymphoid-resident dendritic cells cooperate to efficiently prime naive CD4 T cells.
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迁移和淋巴样居民的树突状细胞合作,有效地启发幼稚的CD4 T细胞。

DOI:
10.1016/j.immuni.2008.08.013
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发表时间:
2008-11-14
期刊:
影响因子:
32.4
通讯作者:
Laufer, Terri M.
Laufer, Terri M.
中科院分区:
医学1区
文献类型:
--
作者:
Allenspach, Eric J.;Lemos, Maria P.;Porrett, Paige M.;Turka, Laurence A.;Laufer, Terri M.

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为了启动适应性免疫应答,罕见的抗原特异性幼稚CD 4 + T细胞必须与同样罕见的携带同源肽-MHC复合物的树突状细胞(DC)相互作用。引流抗原进入位点的淋巴结(LN)由淋巴驻留DC以及从组织迁移的DC填充,尽管在启动T细胞应答中对每个群体的要求仍不清楚。在这里,我们表明,抗原处理和介绍淋巴驻留和迁移的DC是需要克隆选择和扩增的CD 4 + T细胞皮下免疫。淋巴驻留DC的早期抗原呈递启动了引流LN中抗原特异性T细胞的激活和捕获,而不足以进行克隆扩增。然而,迁移性DC与保留在LN中的CD 4 + T细胞相互作用以诱导增殖。因此,不同的DC亚群合作以警告和捕获适当的细胞,然后允许其扩增和分化。
To initiate an adaptive immune response, rare antigen-specific naïve CD4+ T cells must interact with equally rare dendritic cells (DCs) bearing cognate peptide-MHC complexes. Lymph nodes (LN) draining the site of antigen entry are populated by lymphoid-resident DCs as well as DCs that have immigrated from tissues, although the requirement for each population in initiating the T cell response remains unclear. Here, we show that antigen processing and presentation by both lymphoid-resident and migratory DCs is required for clonal selection and expansion of CD4+ T cells following subcutaneous immunization. Early antigen presentation by lymphoid-resident DCs initiates activation and trapping of antigen-specific T cells in the draining LN, without sufficing for clonal expansion. Migratory DCs, however, interact with the CD4+ T cells retained in the LN to induce proliferation. Therefore, distinct DC subsets cooperate to alert and trap the appropriate cell and then license its expansion and differentiation.
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