系统性SARS-CoV-2疫苗接种对粘膜IgA对随后突破性感染的反应的影响
Ulrika Marking1, Oscar Bladh2, Katherina Aguilera2
1Department of Clinical Sciences, Karolinska Institutet Danderyd Hospital, Stockholm, Sweden; Public Health Agency of Sweden, Solna, Sweden.
EBioMedicine
|September 17, 2025
概括
之前的SARS-CoV-2感染会增加粘膜IgA,而重复的系统性疫苗接种可能会降低IgA. 了解这种序列是开发有效的粘膜疫苗和优化疫苗接种策略的关键.
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:
- 粘膜IgA对于控制SARS-CoV-2感染和传播至关重要.
- 系统性免疫得到了充分的研究,但影响粘膜IgA的因素不太了解.
研究的目的:
- 调查影响SARS-CoV-2特定IgA在鼻分泌物中的因素.
- 评估以前感染和接种疫苗对粘膜IgA反应的影响.
主要方法:
- 一项对879名医疗保健工作者进行的队列研究 (COMMUNITY研究).
- 自2020年4月以来,一直收集数据 (血液,临床数据).
- 2022年10月鼻腔IgA的分析,与感染/接种疫苗史相关.
主要成果:
- 81%的参与者有可检测的粘膜IgA.
- 以前的感染增加了粘膜IgA,其影响持续超过22个月.
- 重复的系统性疫苗接种与下面的粘膜IgA有关;疫苗接种前的感染增强了IgA.
结论:
- 重复的粘膜暴露会增强长期存在的粘膜IgA,从而支持粘膜疫苗的开发.
- 系统性疫苗接种可以通过降低病毒载量来减少粘膜IgA生成.
- 这些发现有助于人们了解人群免疫力,并优化顺序接种疫苗的策略.
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