与MVA-BN疫苗接种相比,T细胞对MPXV感染的记忆反应表现出更大的效应器功能和迁移潜力
Ji-Li Chen1,2, Beibei Wang1, Yongxu Lu1,3
1Chinese Academy of Medical Science (CAMS) Oxford Institute (COI), University of Oxford, Oxford, UK.
在感染或MVA-BN疫苗接种后研究T细胞对病毒 (MPXV) 的记忆反应,发现了强烈的CD8+和CD4+T细胞活性. 康复期的个体表现出增强的T细胞细胞毒性和迁移潜力.
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:
- 2022年全球爆发的mopox疫情凸显了了解对麻疹病毒 (MPXV) 的免疫反应的必要性.
- 在MPXV感染后,对长期免疫力至关重要的T细胞记忆反应尚未得到充分的描述.
- 修改疫苗安卡拉 - 巴伐利亚北欧 (MVA-BN) 疫苗在引起保护性T细胞记忆中的有效性需要进一步研究.
研究的目的:
- 评估从mpox中康复的个体和用MVA-BN接种疫苗的个体对MPXV感染的T细胞记忆反应.
- 描述MPXV特异性T细胞的表型和功能,特别是针对特定病毒表位的CD8+T细胞.
- 为了比较康复者与接种疫苗的个体T细胞的功能概况.
主要方法:
- 用疫苗病毒 (VACV) 感染细胞对康复期和MVA-BN疫苗接种个体的CD8+和CD4+T细胞反应的分析.
- 通过HLA-A*02:01.01限制的MPXV特异性表位的识别.
- 对MPXV特异性CD8+T细胞的表型分析和单细胞RNA测序 (scRNAseq),专注于HLA-A*02:01-G5R18-26表位.
主要成果:
- 观察到强烈的CD8+和CD4+T细胞反应,偏向于早期表达的病毒蛋白.
- 确定了7种免疫主导的MPXV特异性表位,受到HLA-A*02:01的限制.
- 虽然康复期和接种疫苗的T细胞表现出类似的分化和激活表型,但康复期T细胞表现出增强的细胞毒性,迁移能力和TCR克隆扩张.
结论:
- 感染MPXV诱导强大的T细胞记忆反应,显著偏向早期病毒抗原.
- 特定于MPXV的记忆T细胞,特别是CD8+T细胞,根据感染或疫苗接种史表现出不同的功能特征.
- 来自康复期个体的T细胞的增强功能能力表明,对未来mopox感染的长期保护有潜在的影响.
更多相关视频
08:10Simultaneous Quantification of Anti-vector and Anti-transgene-Specific CD8+ T Cells Via MHC I Tetramer Staining After Vaccination with a Viral Vector
Published on: November 28, 2018
11:07Whole-animal Imaging and Flow Cytometric Techniques for Analysis of Antigen-specific CD8+ T Cell Responses after Nanoparticle Vaccination
Published on: April 29, 2015
相关概念视频
Immunological Memory
What is Immunological Memory?
Immunological memory is an integral function of the immune system that allows it to recognize and react more rapidly and effectively to pathogens previously encountered. This feature...
Vaccinations
Cell-mediated Immune Responses
Immune Response Against Viral Pathogens
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
Cells of the Adaptive Immune Response
B Cell Activation and Differentiation
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...
