相关实验视频
Updated: Aug 9, 2026

13:27
Generation of Human CD40-activated B cells
Published on: October 17, 2009
在辅助功能发展过程中,CD40对T细胞的联体转化共刺激
D van Essen1, H Kikutani, D Gray
1Department of Immunology, Royal Postgraduate Medical School, Hammersmith Hospital, London, UK.
Nature
|December 7, 1995
概括
缺乏CD40或CD40连接体的小鼠不能产生关键抗体或形成生殖中心. 在 CD40 淘汰赛小鼠中恢复 CD40 连接体信号发送启动了生殖中心的形成,突出了 T 细胞协同刺激.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
背景情况:
- CD40和CD40连接体对于适应性免疫反应至关重要.
- 缺少CD40或CD40连接体会影响抗体的产生和生殖中心的形成.
- 以前的研究仅将这些缺陷归因于B细胞中CD40信号的受损.
研究的目的:
- 研究CD40连体信号传递在T细胞中对B细胞成熟的作用.
- 为了确定通过CD40连接体的T细胞共同刺激是否对生殖中心形成至关重要.
- 阐明CD40缺陷小鼠中抗体反应受损的背后机制.
主要方法:
- 使用CD40淘汰赛小鼠和CD40连接体淘汰赛小鼠.
- 在体内给出可溶性CD40给CD40淘汰小鼠.
- 分析了B细胞类切换和生殖中心形成.
- 在没有CD40的情况下研究了T细胞原始化.
主要成果:
- 缺乏CD40或CD40连接体的小鼠无法产生IgG,IgA或IgE抗体反应.
- 在CD40和CD40连接体淘汰赛小鼠中缺少生殖中心形成.
- 在CD40淘汰赛小鼠中恢复CD40连接体信号,启动了生殖中心的形成.
- 没有CD40信号的T细胞无法帮助正常的B细胞进行类切换或形成生殖中心.
结论:
- 在T细胞中的CD40连接体信号传递是胚芽中心形成的关键因素.
- 通过CD40连接体的T细胞共刺激驱动T辅助细胞的分化.
- 这种分化对于B细胞产生成熟的抗体反应和形成记忆群体至关重要.
相关概念视频
T Cell Activation and Clonal Selection
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...
T Cell Types and Functions
When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
B Cell Activation and Differentiation
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...

