期刊
JOURNAL OF EXPERIMENTAL MEDICINE
卷 215, 期 4, 页码 1227-1243出版社
ROCKEFELLER UNIV PRESS
DOI: 10.1084/jem.20160832
关键词
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资金
- European Union
- Medical Research Council [G1001390]
- Biotechnology and Biological Sciences Research Council [BB/M025292/1]
- Wellcome Trust [091693/Z/10/Z]
- Deutsche Forschungsgemeinschaft [TRR130, TP17, C01, C03]
- BBSRC [1943417, BB/M025292/1] Funding Source: UKRI
- MRC [G1001390, MR/N001435/1] Funding Source: UKRI
- Biotechnology and Biological Sciences Research Council [BB/M025292/1] Funding Source: researchfish
- Wellcome Trust [091693/Z/10/Z] Funding Source: Wellcome Trust
Germinal centers (GCs) are the sites where B cells undergo affinity maturation. The regulation of cellular output from the GC is not well understood. Here, we show that from the earliest stages of the GC response, plasmablasts emerge at the GC-T zone interface (GTI). We define two main factors that regulate this process: Tfh-derived IL-21, which supports production of plasmablasts from the GC, and TNF SF13 (APRIL), which is produced by a population of podoplanin(+) CD157(high) fibroblastic reticular cells located in the GTI that are also rich in message for IL-6 and chemokines CXCL12, CCL19, and CCL21. Plasmablasts in the GTI express the APRIL receptor TNF RSF13B (TACI), and blocking TACI interactions specifically reduces the numbers of plasmablasts appearing in the GTI. Plasma cells generated in the GTI may provide an early source of affinity-matured antibodies that may neutralize pathogens or provide feedback regulating GC B cell selection.
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