互白素-4降低了转录因子BCL6的调节,以促进在生殖中心的记忆B细胞选择
Laila Shehata1, Christopher D Thouvenel2, Brian D Hondowicz1
1Department of Immunology, University of Washington School of Medicine, Seattle, WA 98109, USA.
Immunity
|March 21, 2024
概括
在生殖中心 (GC) B 细胞中传递的介质蛋白-4 (IL-4) 信号降低了 BCL6 的调节,促进了记忆B 细胞 (MBC) 的形成. 这种对BCL6的IL-4控制作为MBC选择和亲和力成熟的开关.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
背景情况:
- 记忆B细胞 (MBCs) 对于长期的幽默免疫是至关重要的,在二次感染时分化为分泌抗体的细胞.
- 生殖中心 (GC) 的形成和动态已得到充分研究,但控制MBC选择和退出的精确信号仍然不清楚.
研究的目的:
- 阐明调节记忆B细胞选择和退出生殖中心的分子机制.
- 研究IL-4细胞因子信号传递在控制BCL6表达中的作用及其对MBC形成的影响.
主要方法:
- 在生殖中心B细胞中的IL-4细胞因子信号通路的分析.
- 通过负自调节研究BCL6转录因子表达的调节.
- 评估改变IL-4生物可用性对MBC选择严格性的影响.
主要成果:
- IL-4信号直接降低GCB细胞中的BCL6,促进它们从GC程序中释放,并促进MBC形成.
- 这种IL-4介导的BCL6下调对于MBC选择至关重要,需要额外的生存信号来进行GC退出或细胞死亡.
- 调节IL-4水平 (增加生物可用性或限制信号传递) 破坏了MBC选择的严格性.
结论:
- IL-4在GC中作为BCL6表达的关键调节器,作为可调节的开关.
- 这种机制允许精确控制MBC选择和亲和力成熟,确保有效的幽默免疫力.
- 了解IL-4在BCL6调节中的作用,为优化抗体反应和记忆形成提供了洞察力.
关键词:
在 BCL6 中.IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-4-IL-IL-IL-IL-IL-IL-IL-IL-IL-IL-IL-IL-IL-IL-IL-IL-IL-IL-IL-IL-IL-IL-IL-IL-IL-IL-IL-IL-IL-IL is is is is is is is is is is is is is is is is what they are发芽中心的发芽中心.记忆 B 细胞 B 细胞选择的选择选择的选择.
相关概念视频
01:24B 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
01:22T Cell Activation and Clonal Selection
721
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...
721
01:24T Cell Types and Functions
1.0K
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...
1.0K
01:23Cells of the Adaptive Immune Response
984
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...
984
01:20Special Features of Adaptive Immunity
810
The adaptive immune system, a crucial component of the overall immune response, offers a highly specialized defense against pathogens. It involves specific cell types and features, enabling it to combat infections effectively and efficiently.
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,...
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,...
810
01:40Cell-mediated Immune Responses
68.2K
Overview
68.2K