在人类中,BNT162b2疫苗诱导中和性T细胞
Ugur Sahin1,2, Alexander Muik3, Isabel Vogler3
1BioNTech, Mainz, Germany. Ugur.Sahin@biontech.de.
Nature
|May 27, 2021
概括
BNT162b2疫苗 (Pfizer-BioNTech COVID-19疫苗) 诱导强大的抗体和T细胞反应. 这种疫苗对SARS-CoV-2变种提供广泛的保护,并且耐受性良好.
科学领域:
- 免疫学
- 疫苗学
- 分子生物学
背景情况:
- BNT162b2是一种脂质纳米粒子配方的mRNA疫苗,编码SARS-CoV-2尖端蛋白.
- 之前的研究表明BNT162b2在预防COVID-19方面具有很高的有效性.
- 了解详细的免疫反应对于疫苗开发至关重要.
研究的目的:
- 在健康成年人中评估BNT162b2主要增强疫苗诱导的幽默和细胞免疫反应.
- 评估针对SARS-CoV-2变种的中和范围.
- 描述T细胞反应,包括表位特异性和表型.
主要方法:
- 一/二期临床试验涉及18至55岁的健康成年人.
- 测量SARS-CoV-2 中和抗体标位.
- 评估T辅助型1 (Th1) 细胞的反应 (IFNγ+,IL-2+).
- 用于表位标识和T细胞表型化的-MHC多重技术.
主要成果:
- 接种BNT162b2疫苗引发了强烈的抗体反应,中和剂量超过了康复的COVID-19患者.
- 中和了来自各种SARS-CoV-2变异的带有尖端蛋白的伪病毒.
- 检测出强大的CD4+和CD8+T细胞反应,包括效应记忆表型,持续数周.
- 通过常见的MHC等位基呈现的保存的BNT162b2诱导表位基.
结论:
- BNT162b2诱导全面的适应性免疫反应,包括体内和多特异性细胞免疫.
- 该疫苗引起对保存表位的反应,表明对SARS-CoV-2变种的潜在广泛保护.
- 在测试剂量中,BNT162b2耐受性良好,并表现出良好的安全性.
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