Transfer of antigen from human B cells to dendritic cells.

Transfer of antigen from human B cells to dendritic cells.
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DOI:
10.1016/j.molimm.2013.10.013
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发表时间:
2014-03
影响因子:
3.6
通讯作者:
Mamula MJ
Mamula MJ
中科院分区:
医学3区
文献类型:
--
作者:
Harvey BP;Raycroft MT;Quan TE;Rudenga BJ;Roman RM;Craft J;Mamula MJ

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B淋巴细胞与其他抗原提呈细胞(APC)的协同作用通常是有效处理和提呈抗原所必需的。在这里,我们描述了一种机制,通过B细胞与树突状细胞(DC)的物理相互作用,导致B细胞受体(BCR)丰富的抗原转移到这些APC。抗原转移包括两个细胞之间的直接接触,然后捕获B细胞膜和细胞内成分。值得注意的是,树突状细胞通过从B细胞转移比通过内吞游离抗原获得更多的抗原。阻断清道夫受体A,参与膜获取的DC表面受体,可以消除这些事件。我们认为,由于BCR对抗原的选择性编辑,从B细胞到DC的抗原转移导致了更集中的免疫反应。
The cooperation of B lymphocytes with other antigen presenting cells (APCs) is often necessary in the efficient processing and presentation of antigen. Herein, we describe a mechanism by which B cells physically interact with dendritic cells (DCs) resulting in the transfer of B cell receptor (BCR)-enriched antigen to these APCs. Antigen transfer involves direct contact between the two cells followed by the capture of B cell derived membrane and intracellular components. Strikingly, DCs acquire greater amounts of antigen by transfer from B cells than by endocytosis of free antigen. Blocking scavenger receptor A, a DC surface receptor involved in membrane acquisition, abrogates these events. We propose that antigen transfer from B cells to DCs results in a more focused immunologic response due to the selective editing of Ag by the BCR.
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