Adenovirus type 5 induces vitamin A-metabolizing enzymes in dendritic cells and enhances priming of gut-homing CD8 T cells.

Adenovirus type 5 induces vitamin A-metabolizing enzymes in dendritic cells and enhances priming of gut-homing CD8 T cells.
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5 型腺病毒可诱导树突状细胞中的维生素 A 代谢酶,并增强肠道归巢 CD8 T 细胞的启动。

DOI:
10.1038/mi.2011.1
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发表时间:
2011-09
期刊:
影响因子:
8
通讯作者:
--
中科院分区:
医学1区
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--
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由于需要将抗原靶向肠道驻留的树突状细胞(DC),因此肠道相关粘膜组织的保护性免疫主要通过口服/直肠免疫诱导。在这里,我们展示了基于腺病毒 5 型 (Ad5) 的 HIV-1 疫苗可以在小鼠肌肉注射免疫后在肠道中引发持久的抗原特异性 CD8 T 细胞反应。 Ad5 在体内启动肠道归巢 CD8 T 细胞的能力与 Ad5 诱导的传统 DC 中视网膜脱氢酶 (RALDH) 的表达相关。 Ad5 介导的 RALDH 诱导不需要通过 Toll 样受体、IRF 的 DNA 依赖性激活剂和几种 MAP 激酶或病毒的复制能力进行信号传导,但依赖于 NF-κB 和粒细胞巨噬细胞集落刺激因子。这些结果提供了一种先天机制,通过该机制,Ad5 刺激的 DC 最初肠道归巢 CD8 T 细胞,并且对开发用于通过肌内途径施用的亚单位疫苗的新型粘膜佐剂具有影响。
Protective immunity at the gut-associated mucosal tissue is induced primarily by oral/rectal immunization owing to the need for targeting antigen to the gut-resident dendritic cells (DC). Here we show that an adenovirus type 5 (Ad5) based HIV-1 vaccine can prime a durable antigen-specific CD8 T cell response in the gut following intramuscular immunization in mice. The ability of Ad5 to prime gut homing CD8 T cells in vivo was associated with Ad5-induced expression of retinal dehydrogenase (RALDH) enzymes in conventional DC. The Ad5-mediated induction of RALDH did not require signaling through toll-like receptors, DNA-dependent activator of IRFs and several MAP kinases, or replication capacity of the virus, but was dependant on NF-κB and granulocyte-macrophage colony-stimulating factor. These results provide an innate mechanism through which Ad5-stimulated DC prime gut homing CD8 T cells and have implications for the development of novel mucosal adjuvants for subunit vaccines administered via the intramuscular route.
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