免疫主导的T细胞对SARS-CoV-2核体蛋白的反应在Omicron突破性感染后的无活化疫苗接种后
1Department of Laboratory Medicine, The Eighth Affiliated Hospital of Sun Yat-sen University, Shenzhen, China.
Virulence
|October 6, 2025
概括
突破性SARS-CoV-2感染的个体对Omicron JN.1变种产生强烈的T细胞反应. 这些反应针对核体蛋白质上的新表位,其中一个保存的表位成为新的主导.
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:
- 严重急性呼吸系统综合征冠状病毒2 (SARS-CoV-2) 疫苗未能防止由于病毒突变和免疫逃避而导致的突破性感染.
- 了解T细胞对像Omicron JN.1这样的新兴变体的反应,对于疫苗开发和公共卫生战略至关重要.
研究的目的:
- 评估突破性感染者对Omicron JN.1变种的T细胞反应.
- 为了识别免疫主导表位和特征T细胞对JN.1核体 (N) 蛋白的反应.
主要方法:
- 在被禁用SARS-CoV-2疫苗接种后,招募了93名患有早期Omicron亚变体突破性感染的人.
- 使用细胞内细胞因子染色来评估T细胞对JN.1N蛋白质的反应.
- 采用3D查,HLA阻断和截断的测试来确定表位和HLA限制.
主要成果:
- 突破性感染诱导了强大的CD4+和CD8+T细胞对JN.1N蛋白特异性反应.
- 反应显示Th1/Tc1歪曲的表型,并保持多功能性.
- 观察到免疫主导表位的显著转变,其中一个保存表位 (N-24) 成为CD4+ T细胞的主导.
结论:
- 早期的Omicron突破性感染引发了对循环中的JN.1亚变体的有效T细胞免疫力.
- 这项研究突出了T细胞表皮质免疫主导的动态性质,以应对病毒进化.
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