记忆B细胞的增殖推动了ChAdOx1和BNT162b2SARS-CoV-2疫苗之间中和反应的差异
David Hodgson1, Yi Liu2,3, Louise Carolan2
1Centre of Mathematical Modelling of Infectious Diseases, London School and Hygiene and Tropical Medicine, London, UK.
medRxiv : the preprint server for health sciences
|July 23, 2024
概括
与腺病毒 (AdV) 疫苗相比,mRNA疫苗显示出优越的COVID-19保护,更长的间隔增强了免疫反应. 这项研究模拟了细胞免疫力,以优化未来的疫苗策略.
科学领域:
- 免疫学 免疫学 免疫学
- 疫苗学 疫苗学 疫苗学
- 计算生物学 计算生物学
背景情况:
- COVID-19疫苗已经减少了疾病负担,但疗效因技术和剂量而异.
- 传递 RNA (mRNA) 疫苗的有效性高于腺病毒 (AdV) 疫苗,特别是在剂量间隔延长的情况下.
研究的目的:
- 使用宿主内机械模型阐明COVID-19疫苗疗效观察到的差异背后的生物机制.
- 分析细胞水平的免疫反应,包括记忆B细胞,等离子体和抗体标位.
主要方法:
- 利用澳大利亚卫生保健工作者对免疫标记物疫苗接种后变化的数据.
- 构建了幽默免疫的动态模型,以捕捉多个免疫标记物的动态.
- 将年龄,剂量表和疫苗类型等等级效应集成到模型中.
主要成果:
- 经过对共变量进行调整,mRNA疫苗诱导的记忆B细胞增殖率是AdV疫苗的2.1倍.
- 延长剂量间隔超过28天后,中和抗体的产生增加了30%.
- 抗体反应在mRNA疫苗和较长的剂量方案中更持久.
结论:
- 主体内动态建模可以揭示驱动疫苗疗效差异的机制.
- 研究结果表明,优化疫苗剂量表和疫苗设计,以提高保护.
- 结果为改善不同人群中疫苗有效性的策略提供信息.
相关概念视频
Vaccinations
44.3K
Overview
44.3K
Cells of the Adaptive Immune Response
975
The T and B lymphocytes of the adaptive immune system develop from common lymphoid progenitor cells in the bone marrow. These progenitors give rise to precursors that eventually develop into both T and B lymphocytes. As these precursors mature, they gain the ability to detect and respond to foreign antigens in the body, a process known as immunocompetence. Additionally, these precursors acquire self-tolerance, a process that ensures they do not react to self-antigens. This intricate system...
975
B Cell Activation and Differentiation
1.7K
The adaptive immune response, a sophisticated defense mechanism, relies on the activation and differentiation of B lymphocytes, or B cells. These processes enable our bodies to mount a tailored response against specific pathogens such as bacteria, free virus particles, toxins, and parasites.
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...
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...
1.7K
Immunological Memory
578
Immunological memory, a pivotal pillar of the adaptive immune system, is responsible for the body's ability to remember and respond more swiftly and effectively to previously encountered pathogens. This remarkable feature is what makes vaccines so effective in preventing diseases.
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...
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...
578
Cross-reactivity
31.0K
Overview
31.0K
T Cell Activation and Clonal Selection
694
T cells are integral to our adaptive immune system, recognizing and effectively responding to foreign antigens. T cell activation and clonal selection are pivotal in orchestrating this immune response. This article elucidates these mechanisms, detailing the roles of cluster of differentiation (CD) markers, major histocompatibility complex (MHC) molecules, costimulatory signals, and the process of clonal selection.
Naive T cells that have not yet encountered an antigen express two primary CD...
Naive T cells that have not yet encountered an antigen express two primary CD...
694


