中央耐受性塑造了中和B细胞的剧目,以对抗其自然宿主中的持久病毒
Marianna Florova1, Tiago Abreu-Mota1, Guido C Paesen2
1Division of Experimental Virology, Department of Biomedicine, University of Basel, Basel 4009, Switzerland.
病毒模拟可以限制B细胞受体 (BCR) 剧目. 这项研究表明,即使是自动反应的BCR也可以在轻链突变后对持久病毒变得功能性,这表明耐受性机制削减了保护性抗病毒谱.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 分子生物学分子生物学
背景情况:
- 病毒对宿主结构的模仿是一种通过耐受性来限制B细胞受体 (BCR) 对抗持久病毒的建议机制.
- 在自然宿主-病原体系统中缺乏实验验证.
研究的目的:
- 在自然宿主病毒环境中研究病毒模拟对B细胞受体谱的影响.
- 为了确定具有潜在自反应性BCRs的B细胞是否可以在功能上对持久病毒进行挽救.
主要方法:
- 工程小鼠模型表达单克隆BCR特异性为淋巴细胞胆膜炎病毒 (LCMV) 包膜糖蛋白.
- 比较了与相同BCR重链配对的未变异和超变异轻链的B细胞.
- 评估了B细胞受体编辑,表面IgM水平和对病毒挑战的反应.
主要成果:
- 带有未变光链的B细胞经历了受体编辑,类似于自身反应的克隆.
- 超突变轻链的B细胞显示自主活性降低 (IgM低),但不是 anergic.
- 在受到LCMV挑战时,这些IgMlow细胞产生了有效的抗病毒反应,包括IgM上调,生殖中心参与,抗体产生,类切换和亲和力成熟.
结论:
- 轻链超突变可以减轻BCR自身活性,允许B细胞对持久病毒做出反应.
- 中央耐受性机制可能会削减保护性抗病毒B细胞谱,甚至针对模仿宿主结构的病毒.
更多相关视频
10:37Analysis of HBV-Specific CD4 T-cell Responses and Identification of HLA-DR-Restricted CD4 T-Cell Epitopes Based on a Peptide Matrix
Published on: October 20, 2021
05:03Author Spotlight: Elucidating the Pathways of TFH Cell Differentiation in Acute LCMV Challenges
Published on: April 26, 2024
相关概念视频
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...
Special Features of Adaptive Immunity
The primary cell types involved in adaptive immunity are T cells and B cells. Each type has a unique role in defending the body against pathogens. T cells are responsible for cell-mediated immunity. They identify and eliminate infected cells directly,...
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...
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...
Cells of the Adaptive Immune Response
Cell-mediated Immune Responses
