B-1 Cell Heterogeneity and the Regulation of Natural and Antigen-Induced IgM Production.

B-1 Cell Heterogeneity and the Regulation of Natural and Antigen-Induced IgM Production.
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B-1细胞异质性以及自然和抗原诱导的IgM产生的调节。

DOI:
10.3389/fimmu.2016.00324
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发表时间:
2016
影响因子:
7.3
通讯作者:
Baumgarth N
Baumgarth N
中科院分区:
医学2区
文献类型:
--
作者:
Baumgarth N

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小鼠体内存在一小部分B细胞,称为B-1细胞,具有不同于传统B细胞的发育起源、表型和功能。它贡献了绝大多数自发产生的“天然”IgM。即使在没有微生物区系的情况下,天然的IgM也是结构性地产生的,并在组织动态平衡和宿主防御中发挥许多不同的功能。B-1细胞也对天然信号和病原体暴露产生IgM作出反应,同时保持自然IgM的稳定水平。因此,在B-1细胞池中,必须存在具有不同和不同功能的细胞,以促进这些不同的功能。该综述考虑了可能导致这种异质性的三个因素:第一,关于前体来源的发育差异,第二,可能对组织间隔中的B-1细胞产生不同影响的组织特异性信号,最后是对自身抗原以及固有和抗原特异性信号的反应性。所有这三个因素都可能塑造B-1细胞对稳态和抗原诱导信号的反应能力和反应能力,从而导致这些先天类B细胞之间的功能异质性。
A small subset of B cells, termed B-1 cells, with developmental origins, phenotypes, and functions that are distinct from those of conventional B cells exist in mice. It contributes the vast majority of spontaneously produced “natural” IgM. Natural IgM is constitutively produced, even in the absence of microbiota, and fulfills many distinct functions in tissue homeostasis and host defense. B-1 cells also respond with IgM production to innate signals and pathogen exposure, while maintaining steady-state levels natural IgM. Thus, within the B-1 cell pool, cells of distinct and heterogeneous functionality must exist to facilitate these different functions. This review considers three factors that may contribute to this heterogeneity: first, developmental differences regarding the origins of the precursors, second, tissue-specific signals that may differentially affect B-1 cells in the tissue compartments, and finally responsiveness to self-antigens as well as innate and antigen-specific signals. All three are likely to shape the repertoire and responsiveness of B-1 cells to homeostatic- and antigen-induced signals and thus contribute to the functional heterogeneity among these innate-like B cells.
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