期刊
IMMUNITY
卷 54, 期 9, 页码 2005-+出版社
CELL PRESS
DOI: 10.1016/j.immuni.2021.08.017
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资金
- Swedish Research Council [2018-05973, SNIC 2019/8-289, 2020/16-34, 2017-01118, 2017-01439]
- Cancerfonden [CAN 2018/710]
- Ake Wibergs Stiftelse [M18-0094]
- German Research Foundation (DFG) [RE 4264/1-1]
- Boehringer Ingelheim
- European Research Council (ERC) [740349, 850638]
- Bill & Melinda Gates Foundation [OPP1156262]
- Ministry of Science and Higher Education of the Russian Federation [075-15-2020784]
- Vinnova [2017-01439] Funding Source: Vinnova
- Swedish Research Council [2017-01118, 2017-01439] Funding Source: Swedish Research Council
- Formas [2017-01118] Funding Source: Formas
- European Research Council (ERC) [850638, 740349] Funding Source: European Research Council (ERC)
Cell fate decisions during early B cell activation dictate the immune response to pathogens and vaccines. The study found that a homogeneous population of activated precursors gives rise to plasmablasts and germinal center B cells after antigen exposure, with most precursors quickly exiting the cell cycle to form early memory B cells. The decline in antigen availability controls these events, demonstrating the plasticity of the immune response.
Cell fate decisions during early B cell activation determine the outcome of responses to pathogens and vaccines. We examined the early B cell response to T-dependent antigen in mice by single-cell RNA sequencing. Early after immunization, a homogeneous population of activated precursors (APs) gave rise to a transient wave of plasmablasts (PBs), followed a day later by the emergence of germinal center B cells (GCBCs). Most APs rapidly exited the cell cycle, giving rise to non-GC-derived early memory B cells (eMBCs) that retained an AP-like transcriptional profile. Rapid decline of antigen availability controlled these events; provision of excess antigen precluded cell cycle exit and induced a new wave of PBs. Fate mapping revealed a prominent contribution of eMBCs to the MBC pool. Quiescent cells with an MBC phenotype dominated the early response to immunization in primates. A reservoir of APs/eMBCs may enable rapid readjustment of the immune response when failure to contain a threat is manifested by increased antigen availability.
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