在ADCC对COVID-19疫苗反应中的年龄相关缺陷
Benjamin L Sievers1,2,3, Mazharul Altaf1,3, Mark T K Cheng1,3,4
1Department of Medicine, University of Cambridge, Cambridge, UK.
NPJ vaccines
|July 2, 2025
概括
接受6剂SARS-CoV-2疫苗的老年人表现出与年龄相关的抗体功能下降,特别是抗体依赖细胞毒性 (ADCC),影响老年人群的免疫保护.
科学领域:
- 免疫学 免疫学 免疫学
- 老年学是一门学科.
- 疫苗学 疫苗学 疫苗学
背景情况:
- 老年人对接种疫苗的免疫反应发生了变化.
- 针对SARS-CoV-2的疫苗对于保护老年人群免受COVID-19的侵害至关重要.
- 了解与年龄相关的疫苗疗效对于公共卫生至关重要.
研究的目的:
- 调查衰老对老年人SARS-CoV-2疫苗有效性的影响.
- 评估中和Fc介导抗体功能的与年龄相关的变化.
- 为了确定疫苗接种后随着年龄的增长而下降的特定免疫机制.
主要方法:
- 在6次SARS-CoV-2疫苗注射后,分析了来自50名老年人 (平均年龄79岁) 的血清样本.
- 对SARS-CoV-2的中和标位的测量.
- 评估Fc介导的效应因子功能,包括使用代用试验的抗体依赖细胞细胞毒性 (ADCC).
- 对IgG1结合水平的评估.
主要成果:
- 在老年人队伍中,不同年龄组中中和化标位是可比的.
- 包括ADCC在内的Fc介导的效应器功能,随着年龄的增长显著下降.
- 80岁以上的个体表现出减少的ADCC,与减少的IgG1结合相关.
- 在Fc介导的免疫反应中观察到与年龄相关的损伤.
结论:
- 在多次SARS-CoV-2疫苗接种后,衰老会损害Fc介导的免疫反应.
- 在老年人中减少ADCC和IgG1结合可能会影响疫苗诱导的保护.
- 这些发现对优化针对老年人群的疫苗策略有影响.
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