Spatiotemporal segregation of human marginal zone and memory B cell populations in lymphoid tissue.

Spatiotemporal segregation of human marginal zone and memory B cell populations in lymphoid tissue.
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DOI:
10.1038/s41467-018-06089-1
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发表时间:
2018-09-21
影响因子:
16.6
通讯作者:
Spencer J
Spencer J
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Zhao Y;Uduman M;Siu JHY;Tull TJ;Sanderson JD;Wu YB;Zhou JQ;Petrov N;Ellis R;Todd K;Chavele KM;Guesdon W;Vossenkamper A;Jassem W;D'Cruz DP;Fear DJ;John S;Scheel-Toellner D;Hopkins C;Moreno E;Woodman NL;Ciccarelli F;Heck S;Kleinstein SH;Bemark M;Spencer J

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人类记忆 B 细胞和边缘区 (MZ) B 细胞具有共同的特征,例如 CD27 的表达以及 IGHV 和 BCL6 基因的体细胞突变,但它们之间的关系存在争议。在这里,我们展示了淋巴组织内的表型进展,因为 MZ B 细胞通过远离记忆细胞的前体 CD27−CD45RBMEM55+ 群体从成熟的幼稚 B 细胞库中出现。通过成像质谱流式细胞术,我们发现 MZ B 细胞和记忆 B 细胞在有组织的肠道淋巴组织中占据不同的微解剖学生态位。两个种群都在远处的淋巴组织和血液之间广泛传播,并且都在肠道生发中心 (GC) 中使 IGHV 库多样化,但仍然在很大程度上保持克隆分离。因此,MZ B 细胞在发育上与经典记忆 B 细胞并不连续或相似,尽管它们具有共同的通过 GC 的能力,在 GC 中获得体细胞突变。人类记忆和边缘区 B 细胞具有一些共同特征,包括 CD27 表达和体细胞超突变,但它们的谱系关系仍不清楚。在这里,作者使用质谱流式细胞术和顺序聚类方法来表明,尽管记忆细胞和边缘区 B 细胞具有共同的特征,但它们代表了不同的谱系选择。
Human memory B cells and marginal zone (MZ) B cells share common features such as the expression of CD27 and somatic mutations in their IGHV and BCL6 genes, but the relationship between them is controversial. Here, we show phenotypic progression within lymphoid tissues as MZ B cells emerge from the mature naïve B cell pool via a precursor CD27−CD45RBMEM55+ population distant from memory cells. By imaging mass cytometry, we find that MZ B cells and memory B cells occupy different microanatomical niches in organised gut lymphoid tissues. Both populations disseminate widely between distant lymphoid tissues and blood, and both diversify their IGHV repertoire in gut germinal centres (GC), but nevertheless remain largely clonally separate. MZ B cells are therefore not developmentally contiguous with or analogous to classical memory B cells despite their shared ability to transit through GC, where somatic mutations are acquired. Human memory and marginal zone B cells share some features including CD27 expression and somatic hypermutation, but their lineage relationship is still unclear. Here the authors use mass cytometry and sequential clustering methods to show that, despite their shared features, memory and marginal zone B cells represent distinct lineage choices.
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