Germinal centre-driven maturation of B cell response to mRNA vaccination.

Germinal centre-driven maturation of B cell response to mRNA vaccination.
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DOI:
10.1038/s41586-022-04527-1
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发表时间:
2022-04
期刊:
影响因子:
64.8
通讯作者:
--
中科院分区:
综合性期刊1区
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--
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生发中心 (gc) 是淋巴结构,B 细胞在此获得亲和力增强的体细胞超突变 (SHM),存活的克隆分化为记忆 B 细胞 (mbc) 和长寿骨髓浆细胞 (BMPC)。 SARS-CoV-2 mRNA 疫苗接种可诱导持续的 gc 反应,在人体中可持续至少六个月。做出反应的 GC B 细胞的命运以及这种持续存在的功能后果尚未阐明。我们在 42 名六个月前接受两剂 BNT162b2(一种 SARS-CoV-2 mRNA 疫苗)的个体中检测到了 SARS-CoV-2 刺突 (S) 特异性 MBCS。 11 名参与者中有 9 名检测到 S 特异性 IgG 分泌 BMPC。通过对 8 个个体的响应性血液浆母细胞和 MBC、淋巴结 GC、浆细胞和 BMPC 的 B 细胞受体进行测序以及相应单克隆抗体 (mAb) 的表达的组合方法,我们追踪了 1540 个 S 特异性 B 细胞克隆的进化。我们发现,早期血液 S 特异性浆母细胞平均表现出最低的 SHM 频率。相比之下,S 特异性 GC B 细胞的 SHM 频率在疫苗接种后 6 个月内增加了 3.5 倍。 S 特异性 MBC 和 BMPC 积累了高水平的 SHM,这与血液中抗 S 抗体亲合力和 BMPC 衍生 mAb 的亲和力以及中和能力增强相对应。这项研究记录了 SARS-CoV-2 疫苗接种引起的人类 GC 反应的惊人持久性如何最终导致亲和力成熟的长期抗体反应,从而有效中和病毒。
Germinal centres (gc) are lymphoid structures where B cells acquire affinity-enhancing somatic hypermutations (SHM), with surviving clones differentiating into memory B cells (mbcs) and long-lived bone marrow plasma cells (BMPCs). SARS-CoV-2 mRNA vaccination induces a persistent gc response that lasts for at least six months in humans. The fate of responding GC B cells as well as the functional consequences of such persistence have not been elucidated. we detected SARS-CoV-2 spike (S)-specific MBCS in 42 individuals who had received two doses of BNT162b2, a SARS-CoV-2 mRNA vaccine six months earlier. S-specific IgG-secreting BMPCs were detected in 9 out of 11 participants. Using a combined approach of sequencing the B cell receptors of responding blood plasmablasts and MBCs, lymph node GC and plasma cells and BMPCs from eight individuals and expression of the corresponding monoclonal antibodies (mAbs), we tracked the evolution of 1540 S-specific B cell clones. We show that early blood S-specific plasmablasts – on average – exhibited the lowest SHM frequencies. In comparison, SHM frequencies of S-specific GC B cells increased by 3.5-fold within six months after vaccination. S-specific MBCs and BMPCs accumulated high levels of SHM, which corresponded with enhanced anti-S antibody avidity in blood and affinity as well as neutralization capacity of BMPC-derived mAbs. This study documents how the striking persistence of SARS-CoV-2 vaccination-induced GC reaction in humans culminates in affinity-matured long-term antibody responses that potently neutralize the virus.
生发中心B细胞对SARS-COV-2的反应。
DOI: 10.1038/s41577-021-00657-1
发表时间: 2022-01
期刊: Nature reviews. Immunology
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DOI: 10.1126/science.1201730
发表时间: 2011-03-04
期刊: Science (New York, N.Y.)
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发表时间: 2021-12-03
期刊: Science (New York, N.Y.)
影响因子: --
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