接种HIV-1疫苗后的先天性免疫细胞激活与抗体生产增加有关
Kombo F N'guessan1,2, Kawthar Machmach1,2, Isabella Swafford1,2
1United States Military HIV Research Program, Walter Reed Army Institute of Research, Silver Spring, MD, United States.
Frontiers in immunology
|February 29, 2024
概括
这项关于RV306艾滋病毒疫苗试验的研究发现,在接种疫苗后,NK,MAIT和γδ T细胞等先天性免疫细胞会被激活. 这种激活与抗体反应有关,这表明这些细胞在促进疫苗诱导的免疫力方面发挥了作用.
科学领域:
- 免疫学 免疫学 免疫学
- 疫苗学 疫苗学 疫苗学
- 传染性疾病 传染性疾病
背景情况:
- 在RV144试验中,卡纳里波克斯蛋白艾滋病毒疫苗方案的有效性是适度的.
- 了解对艾滋病毒疫苗接种的先天免疫反应对于改善疫苗设计至关重要.
研究的目的:
- 研究RV306艾滋病毒疫苗方案对先天性免疫细胞激活的影响.
- 探索先天细胞激活和疫苗诱导的抗体反应之间的关联.
主要方法:
- 从RV306试验参与者的外周血液单核细胞 (PBMC) 在接种疫苗之前和之后进行分析.
- 流细胞计用于评估各种先天性免疫细胞群 (MAIT,iNKT,γδ T,NK细胞,单细胞) 上的激活标志物 (CD38,CD69,HLA-DR).
- 研究了先天细胞激活和HIV Env特异性抗体标位 (IgG,IgG1,IgG3) 和中和标位之间的相关性.
主要成果:
- 在RV306试验中,接种疫苗导致粘膜关联不变T细胞 (MAIT),不变天然杀手T细胞 (iNKT),γδT细胞和NK细胞的显著激活.
- 疫苗接种后观察到单细胞群的变化,包括非经典和中间单细胞的增加和经典单细胞的减少.
- NK细胞激活与HIV Env特异性总IgG和IgG1标位正相关,而Vδ1 T细胞激活与IgG3标位相关. MAIT细胞激活显示出与IgG3标位的趋势关联.
结论:
- 天生的免疫细胞,特别是NK,MAIT和γδ T细胞,在HIV-1疫苗注射后的免疫反应中发挥作用.
- 接种疫苗后的先天细胞激活与特定抗体反应的发展有关,突出了它们对疫苗疗效的潜在贡献.
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