在Omicron XBB再感染6个月后,中和抗体和记忆T细胞反应的动态变化
Xin-Jing Zhao1,2, Xin-Lou Li3, Sheng Zhang1
1State Key Laboratory of Pathogen and Biosecurity, Academy of Military Medical Science, Beijing, China.
Frontiers in immunology
|October 22, 2024
概括
欧米克朗XBB再感染增强了中和抗体 (NAbs) 和T细胞反应,为至少六个月的SARS-CoV-2变种提供了持续的保护. 这凸显了卫生保健工作者 (HCW) 更新免疫接种的重要性.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 传染性疾病 传染性疾病
背景情况:
- 由于COVID-19的流行,重复的SARS-CoV-2感染很常见.
- 有限的数据存在于Omicron XBB再感染后的免疫持续性.
研究的目的:
- 研究中和抗体 (NAbs) 和T细胞反应的耐用性和交叉反应性.
- 在6个月内评估Omicron BA.5感染的个体的免疫反应,有或没有Omicron XBB再感染.
主要方法:
- 未来研究涉及20名受试者.
- 伪病毒中和试验测量NAbs.
- 光点测定用于评估T细胞反应.
主要成果:
- 对EG.5.1,BA.2.86和JN.1的NAbs在BA.5感染后6个月显著下降.
- 在6个月的时间里,Omicron XBB再感染导致了对所有变体的NAbs增加和可检测.
- 记忆T细胞反应交叉识别野生型和Omicron尖峰,在XBB再感染后3个月达到顶峰.
结论:
- 由Omicron XBB再感染引起的中和抗体持续至少6个月.
- 即使在XBB暴露后的非血清转化个体中也观察到强大的T细胞反应.
- 卫生保健工作者应保持个人防护,并考虑更新疫苗接种.
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