受体结合域特定B细胞反应由mRNA免疫对抗SARS-CoV-2诱导
Maria Geropeppa1, Ioanna Papadatou1,2,3, Panagiotis Sarantis4
1Immunobiology and Vaccinology Research Laboratory, School of Medicine, National and Kapodistrian University of Athens, 11527 Athens, Greece.
Vaccines
|July 29, 2023
概括
双重mRNA疫苗接种增强了受体结合域 (RBD) 特定的B细胞记忆力和对抗SARS-CoV-2的中和抗体. 这通过丰富关键记忆B细胞来增强长期免疫力,这对于持续的保护至关重要.
科学领域:
- 免疫学 免疫学 免疫学
- 疫苗学 疫苗学 疫苗学
- 分子生物学分子生物学
背景情况:
- mRNA疫苗对于控制SARS-CoV-2至关重要,但由于抗体保护的寿命短,需要经常接种疫苗.
- 开发强大的受体结合域 (RBD) 特定的B细胞记忆对于改善疫苗诱导的免疫力至关重要.
- 额外的mRNA疫苗剂量对RBD特异性B细胞记忆组成的影响尚不清楚.
研究的目的:
- 研究双重BNT162b2mRNA疫苗接种对RBD特异性B细胞记忆池的影响.
- 评估接种疫苗后B细胞记忆中的定性和定量变化.
- 确定B细胞反应,抗体标位和免疫记忆之间的相关性.
主要方法:
- 在双重BNT162b2疫苗接种后,对RBD特异性B细胞总和记忆的分析.
- 流细胞测量用于识别和量化特定的B细胞子集,包括CD27+IgM-记忆细胞.
- 重复测量相关性 (rmcorr) 分析,将抗体标位与B细胞种群联系起来.
主要成果:
- 双重BNT162b2疫苗接种显著增加了RBD特异性B细胞总数,RBD特异性B细胞记忆和中和抗体.
- 在第二剂后观察到CD27+IgM-记忆RBD特异性B细胞的丰富趋势.
- 在抗体标位和总和记忆RBD特异性B细胞之间发现了显著的相关性,表明了协调的免疫反应.
结论:
- 额外的BNT162b2mRNA疫苗剂量可以增强B细胞记忆池的质量和数量方面.
- 接种BNT162b2疫苗会诱导一种协调的免疫反应,包括B细胞和抗体的产生.
- 这些发现支持mRNA疫苗在建立针对SARS-CoV-2抗原的持久免疫记忆中的作用.
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