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首页> 外文期刊>Immunology and Cell Biology >BAFF, IL‐4 and IL‐21 separably program germinal center‐like phenotype acquisition, BCL6 expression, proliferation and survival of CD40L‐activated B cells in?vitro in?vitro
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BAFF, IL‐4 and IL‐21 separably program germinal center‐like phenotype acquisition, BCL6 expression, proliferation and survival of CD40L‐activated B cells in?vitro in?vitro

机译:BAFF,IL-4和IL-21可分离地编程生殖中心样表型采集,BCL6在体外CD40L-活化B细胞的BCL6表达,增殖和存活

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摘要

Abstract A B cell culture system using BAFF , IL ‐4 and IL ‐21 was recently developed that generates B cells with phenotypic and functional characteristics of in?vivo ‐generated germinal center (GC) B cells. Here, we observe discrete influences of each exogenous signal on the expansion and differentiation of a CD 40L‐activated B cell pool. IL ‐4 was expressly necessary, but neither BAFF nor IL ‐21 was required for B cell acquisition of the GC B cell phenotypes of peanut agglutinin binding and loss of CD 38 and IgD expression. Both IL ‐4 and IL ‐21 enhanced cell cycle entry upon initial activation dose‐dependently, and did so additively. Importantly, while both cytokines acted in concert to increase overall BCL 6 expression amounts, IL ‐21 exposure uniquely caused a small proportion of cells to attain a higher level of BCL 6 expression, reminiscent of in?vivo GC B cells. In contrast, BAFF supported survival of?a fraction of memory‐like B cells in extended cultures after removal of surrogate T cell‐help signals. Thus, by separably programming proliferation, survival and GC phenotype acquisition, IL ‐4, BAFF and IL ‐21 drive distinct components of activated B cell fate.
机译:摘要最近开发了使用BAFF,IL-4和IL -21的B细胞培养系统,产生B细胞,其具有在α体内的生发中心(GC)B细胞中的表型和功能特征。这里,我们观察每个外源信号对CD 40L-活性B细胞库的膨胀和分化的离散影响。 IL-4明确必需,但B细胞均未对花生凝集素结合和CD 38和IgD表达丧失的GC B细胞表型进行BAFF或IL -21。 IL-4和IL -21依赖性初始激活剂量增强细胞周期进入,并如此恰当地做得如此恰当地进行。重要的是,虽然两种细胞因子在音乐会上作用以增加整体BCL 6表达量,但IL -21曝光唯一引起少比例的细胞以获得更高水平的BCl 6表达,使αvivoGCB细胞同时发生。相比之下,BAFF支持存活?除了替代T细胞帮助信号后,延长培养物中的一部分内存样B细胞。因此,通过可单独编程增殖,存活和GC表型获取,IL -4,BAFF和IL -21驱动激活的B细胞命运的不同组分。

著录项

  • 来源
    《Immunology and Cell Biology》 |2019年第9期|共14页
  • 作者单位

    Department of Immunology &

    PathologyAlfred Research AllianceMelbourne VIC 3004 Australia;

    Department of Immunology &

    PathologyAlfred Research AllianceMelbourne VIC 3004 Australia;

    Department of Immunology &

    PathologyAlfred Research AllianceMelbourne VIC 3004 Australia;

    Department of Immunology &

    PathologyAlfred Research AllianceMelbourne VIC 3004 Australia;

    Department of Immunology &

    PathologyAlfred Research AllianceMelbourne VIC 3004 Australia;

    Department of Immunology &

    PathologyAlfred Research AllianceMelbourne VIC 3004 Australia;

    Centre for Inflammatory DiseasesMonash UniversityClayton VIC 3168 Australia;

    Department of Immunology &

    PathologyAlfred Research AllianceMelbourne VIC 3004 Australia;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 医学免疫学;
  • 关键词

    BCL6; CD40L; germinal centre; iGB cell; IL‐21; IL‐4;

    机译:BCL6;CD40L;生发中心;IGB细胞;IL-21;IL-4;

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