在COVID-19疫苗接种后两年内,SARS-CoV-2抗体反应的高分辨率动力学和细胞决定因素
Rocío Rubio1, Dídac Macià2, Diana Barrios1
1ISGlobal, Barcelona, Spain; Facultat de Medicina i Ciències de la Salut, Universitat de Barcelona (UB), Barcelona, Spain.
Microbes and infection
|September 19, 2024
概括
接种COVID-19疫苗后的抗体水平因类型而异,IgG和IgA在增强剂后的耐用性更长. 感染导致抗体比疫苗接种更高,持续时间更长,而Omicron变种显示出更快的抗体衰变.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 疫苗学 疫苗学 疫苗学
背景情况:
- 了解COVID-19疫苗接种后的长期抗体动力学至关重要.
- 以前的研究往往缺乏纵向数据,缺少个体抗体差异.
研究的目的:
- 描述COVID-19疫苗接种后IgM,IgA和IgG抗体的长期动力学.
- 评估后的T细胞反应后的疫苗接种.
- 为了比较接种疫苗后的抗体反应与自然感染.
主要方法:
- 使用了Luminex,激活诱导标记 (AIM) 和IFN-γ/IL-2光点测定.
- 在接种疫苗后两年内,分析了31名健康成年人的610个样本.
- 在提升剂后六个月评估T细胞反应.
主要成果:
- IgG抗体的衰变缓慢,而IgA显示出最初的急剧下降,稳定在血清阳性值以上.
- 在初级疫苗接种后,IgM抗体迅速降低到无法检测的水平.
- 三次疫苗剂量比两次剂量产生更高和更持续的IgG和IgA水平.
- 与疫苗接种相比,自然感染导致了最高的抗体峰值和最慢的衰变.
- 针对Omicron亚变体的抗体比对祖先病毒的抗体衰变得更快.
- 多功能T细胞与随后的IgA反应正相关.
结论:
- 存在不同的抗体同型模式,具有显著的个体间变异性.
- 增剂剂量有效地增强和维持抗抗体反应.
- 了解这些动力学对于疫苗开发和公共卫生战略至关重要.
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