在亲和力成熟过程中操纵选择力以产生交叉反应性HIV抗体
Shenshen Wang1, Jordi Mata-Fink2, Barry Kriegsman3
1Ragon Institute of MGH, MIT, and Harvard, Cambridge, MA 02139; Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139; Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139.
生成交叉反应性抗体对于对抗可变病原体至关重要. 与尾酒不同的是,用抗原变体进行序列免疫是诱导这些抗体的首选方法,正如in silico模型和小鼠实验所显示的那样.
科学领域:
- 免疫学 免疫学 免疫学
- 计算生物学 计算生物学
- 病毒学 病毒学
背景情况:
- 亲和力成熟是对抗病原体产生强大的抗体的关键.
- 抗体必须中和各种高度可变的病原体菌株.
- 了解与抗原变体的亲和力成熟对于有效免疫非常重要.
研究的目的:
- 在存在抗原变异的情况下建模亲和力成熟.
- 调查影响交叉反应抗体诱导的因素.
- 为了比较顺序与尾酒免疫策略.
主要方法:
- 开发了一种与抗原变体的亲和力成熟的in silico模型.
- 分析了时间抗原管理模式的影响.
- 在小鼠中使用HIV包膜蛋白的变体gp120构造进行实验.
主要成果:
- 来自抗原变异的相互冲突的选择力可以挫败亲和力成熟.
- 在某些条件下,交叉反应性抗体诱导发生的概率很低.
- 用抗原变体进行序列免疫,对于诱导针对CD4结合部位的交叉反应性抗体,优于尾酒.
结论:
- 抗原的时间模式显著影响着亲和力成熟的结果.
- 序列免疫策略在产生广泛中和抗体方面更有效.
- 这些发现对设计针对HIV等可变病毒的疫苗有意义.
更多相关视频
13:14Generation of Discriminative Human Monoclonal Antibodies from Rare Antigen-specific B Cells Circulating in Blood
Published on: February 6, 2018
10:50Assessment of Immunologically Relevant Dynamic Tertiary Structural Features of the HIV-1 V3 Loop Crown R2 Sequence by ab initio Folding
Published on: September 15, 2010
相关概念视频
Affinity and Avidity
Cross-reactivity
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...
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...
T Cell Activation and Clonal Selection
Naive T cells that have not yet encountered an antigen express two primary CD...
Antigens Involved in Adaptive Immunity
Complete Antigens
Complete antigens possess both immunogenicity and...
