Putting J chain back on the map: how might its expression define plasma cell development?
Putting J chain back on the map: how might its expression define plasma cell development?
复制标题
让 J 链重新出现在地图上:它的表达如何定义浆细胞的发育?
DOI:
10.4049/jimmunol.1400531
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发表时间:
2014-10-01
期刊:
影响因子:
--
通讯作者:
Flajnik MF
中科院分区:
文献类型:
--
作者:
Castro CD;Flajnik MF
J-chain (Joining chain) is a small polypeptide that regulates multimerization of secretory IgM and IgA, the only two mammalian Igs capable of forming multimers. J-chain also is required for polyIg-receptor (pIgR)-mediated transport of these Ig classes across the mucosal epithelium. It is generally assumed that all plasma cells express J-chain regardless of expressed isotype, despite the documented presence of J-chain-negative plasma cells in mammals, specifically in all monomeric IgA- and some IgG-secreting cells. Compared to most other immune molecules, J-chain has not been extensively studied, due, in part, to technical limitations. Even the reported phenotype of the J-chain knockout mouse is often misunderstood or underappreciated. In this short review, we will discuss J-chain in light of the various proposed models of its expression and regulation, with an added focus on the evolutionary significance of J-chain and its expression in different B cell lineages/differentiation states.
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