Role of retinoic acid in the imprinting of gut-homing IgA-secreting cells.

Role of retinoic acid in the imprinting of gut-homing IgA-secreting cells.
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DOI:
10.1016/j.smim.2008.08.002
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发表时间:
2009-02
影响因子:
7.8
通讯作者:
von Andrian UH
von Andrian UH
中科院分区:
医学2区
文献类型:
--
作者:
Mora JR;von Andrian UH

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小肠粘膜中的抗体分泌细胞(ASCs)来源于被认为产生于肠相关淋巴组织(GALT)的活化B细胞。离开GALT后,B细胞返回血液,在那里它们必须表达肠道归巢受体α4β7和CCR9,以便迁移到小肠。最近的证据表明,GALT中的肠道相关树突状细胞(dc)通过一种依赖于维生素a代谢物视黄酸(RA)的机制诱导B细胞上的肠道归巢受体。此外,尽管ASC与其他粘膜组织以RA独立的方式分泌IgA,但肠道和GALT中高水平RA的存在可以促进B细胞类向IgA转换,从而促进肠粘膜中IgA的产生。在这里,我们讨论了RA在肠道归巢ASC印记中的作用,以及RA与肠道iga -ASC产生相关的证据。
Antibody-secreting cells (ASCs) lodging in the mucosa of the small intestine are derived from activated B cells that are thought to arise in gut-associated lymphoid tissues (GALT). Upon leaving the GALT, B cells return to the blood where they must express the gut-homing receptors α4β7 and CCR9 in order to emigrate into the small bowel. Recent evidence indicates that gut-associated dendritic cells (DCs) in GALT induce gut-homing receptors on B cells via a mechanism that depends on the vitamin A metabolite retinoic acid (RA). In addition, although ASC associated with other mucosal tissues secrete IgA in an RA-independent fashion, the presence of high levels of RA in intestine and GALT can promote B cell class switching to IgA and, thus, boost the production of IgA in the intestinal mucosa. Here we discuss the role of RA in the imprinting of gut-homing ASC and the evidence linking RA with the generation of intestinal IgA-ASCs.
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