由SARS-CoV-2感染或COVID-19疫苗接种诱导的中和抗体识别的表位之间的差异
Shinya Yamamoto1,2, Seiya Yamayoshi1,3, Mutsumi Ito1
1Division of Virology, Institute of Medical Science, University of Tokyo, Tokyo 108-8639, Japan.
iScience
|July 14, 2023
概括
在S蛋白中的SARS-CoV-2突变可以降低抗体的有效性,影响疫苗的有效性. 这项研究确定了影响疫苗诱导抗体中和的特定突变,突出了个体免疫反应.
科学领域:
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
- 遗传学 遗传学 是一个
背景情况:
- 严重急性呼吸道综合征冠状病毒2 (SARS-CoV-2) 通过其尖端 (S) 蛋白中的氨基酸替代进化.
- 这些突变可以降低中和抗体的有效性,可能降低疫苗的疗效.
- 了解这些抗原变化对于开发和更新疫苗至关重要.
研究的目的:
- 在SARS-CoV-2 S蛋白中识别特定的氨基酸替代物,从而改变病毒抗原性.
- 调查这些替代物对康复患者和接种疫苗的抗体中和的影响.
- 探索针对不同SARS-CoV-2变种的个体中中和抗体强度的变异.
主要方法:
- 从康复人员或接种疫苗的血中传递SARS-CoV-2,以对突变病毒进行选择.
- 分析S蛋白中的氨基酸替代,包括N端域 (NTD) 和受体结合域 (RBD),以及S2区域.
- 评估血样本对产生的突变病毒和循环变异的中和作用.
主要成果:
- 发现S2区域,NTD和RBD中的几种氨基酸替代物会影响疫苗血的中和效能.
- 这些发现表明,S2区域和NTD/RBD的突变都会影响疫苗诱导抗体的中和.
- 在疫苗血对生成的突变病毒和循环的SARS-CoV-2菌株的中和功效方面观察到显著的个体变异.
结论:
- 包括S2,NTD和RBD在内的SARS-CoV-2S蛋白的各个区域中的氨基酸替代可以逃避疫苗诱导的抗体中和.
- 中和抗体的有效性在个体之间有很大差异,这表明宿主遗传因素的作用.
- 这些结果强调了在疫苗有效性和未来疫苗设计的背景下考虑个体免疫背景和病毒演变的重要性.
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