降低CD3的调节可以识别高度,多效的SARS-CoV-2疫苗,并召回具有明显代谢的抗原特异性Th细胞
Arne Sattler1, Stefanie Gamradt2,3, Vanessa Proß1
1Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Department for General and Visceral Surgery, Berlin, Germany.
JCI insight
|January 11, 2024
概括
在SARS-CoV-2疫苗接种后,高性CD4+T细胞失去CD3表达,变得更具功能. 这些CD3-T细胞与更好的免疫反应有关,但在老年人和免疫抑制个体中减少.
科学领域:
- 免疫学 免疫学 免疫学
- 疫苗学 疫苗学 疫苗学
- 细胞的新陈代谢
背景情况:
- 免疫细胞的功能性敏捷性对于对抗像SARS-CoV-2这样的病原体的宿主防御至关重要.
- 了解疫苗接种后的T细胞反应是优化免疫保护的关键.
研究的目的:
- 为了研究SARS-CoV-2疫苗接种后高度CD4+T细胞的特征.
- 确定高质量的免疫反应的潜在生物标志物及其在特定人群中的局限性.
主要方法:
- 在SARS-CoV-2疫苗接种后对人类外周血液单核细胞 (PBMCs) 的流细胞计分析.
- 评估T细胞中的CD3表达,细胞因子产生,多功能性和代谢途径.
- 与疫苗特异性抗体水平,天真CD4+T细胞池大小,年龄和免疫抑制疗法的相关性分析.
主要成果:
- 显著比例的高度尖端特异性CD4+ T细胞在体外激活时降低了CD3表达,形成了CD3子集.
- CD3-T细胞子集表现出增强的多功能性和增加的细胞因子生产.
- 代谢分析显示,CD3-T细胞转向脂肪酸合成,而葡萄糖代谢仍然与CD3+细胞相似.
- 疫苗特异性CD3-T细胞的频率与原始CD4+T细胞数量和IgG水平正相关,但与年龄负相关.
- 这些CD3-T细胞在老年人和接受免疫抑制治疗的人群中被发现受损.
结论:
- CD3-T辅助细胞代表了与SARS-CoV-2疫苗接种后高质量,功能性免疫反应相关的子集.
- 这些细胞在老化和免疫抑制个体中的受损频率突显了它们在风险人群中的脆弱性和重要性.
- 这些发现确定了CD3-T细胞作为有效的适应性免疫的潜在相关物和治疗策略的目标.
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