印制的SARS-CoV-2特异性记忆淋巴细胞定义了混合免疫
Lauren B Rodda1, Peter A Morawski2, Kurt B Pruner1
1Department of Immunology, University of Washington School of Medicine, Seattle, WA 98109, USA.
Cell
|April 12, 2022
概括
由SARS-CoV-2感染和接种疫苗引起的混合免疫力可以增强免疫力. 与未感染者相比,先前感染的个体表现出优异的疫苗诱导免疫记忆,包括明显的T细胞反应.
科学领域:
- 免疫学
- 病毒学
- 疫苗学
背景情况:
- 免疫记忆是由最初的抗原暴露 (原始化) 形成的.
- 在感染和接种疫苗后,SARS-CoV-2 流行病允许追踪免疫记忆的发展.
- 通过感染和接种疫苗的混合免疫力可以增强对SARS-CoV-2的保护.
研究的目的:
- 调查之前的SARS-CoV-2感染如何影响疫苗诱导的免疫记忆.
- 为了比较疫苗接种后的先前感染者与原始个体的免疫反应.
主要方法:
- 疫苗接种后对SARS-CoV-2 RBD特异性B细胞和中和抗体的分析.
- 在不同感染史的接种疫苗的人群中,SARS-CoV-2特异性CD4+T细胞细胞因子 (IFN-γ,IL-10) 的表征.
主要成果:
- 之前感染的个体在接种疫苗后产生了更多的SARS-CoV-2 RBD特异性记忆B细胞和变体中和抗体.
- 在之前感染的个体中观察到IFN-γ和IL-10表达记忆性SARS-CoV-2尖端特异性的CD4+T细胞.
- 在原始个体中,额外的疫苗接种增强了幽默记忆,但没有复制混合免疫中发现的独特的CD4+T细胞细胞因子.
结论:
- 标记SARS-CoV-2特异性记忆淋巴细胞的特征对于定义杂交免疫是至关重要的.
- 之前的感染显著影响了疫苗诱导的免疫记忆的质量和特征,特别是T细胞反应.
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