Current Concepts of Antigen Cross-Presentation.

Current Concepts of Antigen Cross-Presentation.
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DOI:
10.3389/fimmu.2018.01643
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发表时间:
2018
影响因子:
7.3
通讯作者:
Burgdorf S
Burgdorf S
中科院分区:
医学2区
文献类型:
--
作者:
Embgenbroich M;Burgdorf S

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树突状细胞具有在主要组织相容性复合体(MHC)I分子上高效递呈内化抗原的能力。这个过程被称为交叉呈现,在疫苗接种后产生针对病毒和肿瘤的免疫反应或在诱导免疫耐受方面发挥重要作用。多年来,交叉呈现的分子机制一直是激烈争论的话题。然而,对这些机制的明确看法仍然很困难,部分原因是存在重要的遗留问题、有争议的结果和讨论。在这里,我们对目前的抗原交叉提呈的概念进行综述,重点描述主要的交叉提呈途径,延迟的抗原降解对有效的交叉提呈的作用,抗原从内体到胞浆的错位,蛋白酶体衍生的多肽的反向运输以装载到MHC I上,以及交叉提呈机制从内质网到内体的移位。我们试图强调最近的进展,讨论一些有争议的数据,并指出该领域的一些主要悬而未决的问题。
Dendritic cells have the ability to efficiently present internalized antigens on major histocompatibility complex (MHC) I molecules. This process is termed cross-presentation and is important role in the generation of an immune response against viruses and tumors, after vaccinations or in the induction of immune tolerance. The molecular mechanisms enabling cross-presentation have been topic of intense debate since many years. However, a clear view on these mechanisms remains difficult, partially due to important remaining questions, controversial results and discussions. Here, we give an overview of the current concepts of antigen cross-presentation and focus on a description of the major cross-presentation pathways, the role of retarded antigen degradation for efficient cross-presentation, the dislocation of antigens from endosomal compartment into the cytosol, the reverse transport of proteasome-derived peptides for loading on MHC I and the translocation of the cross-presentation machinery from the ER to endosomes. We try to highlight recent advances, discuss some of the controversial data and point out some of the major open questions in the field.
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