甲状腺炎会通过诱导树突细胞死亡来损害T细胞的原始化
Haitong Mao1, Eric K Dumas1, Michael N Starnbach1
11Department of Microbiology, Harvard Medical School, Boston, Massachusetts, USA.
Infection and immunity
|January 8, 2025
概括
甲状腺炎感染会杀死树突细胞 (DCs),损害对适应性免疫至关重要的T细胞激活. 这种由病原体诱导的DC亡可能是免疫逃避的机制.
科学领域:
- 免疫学 免疫学 免疫学
- 微生物学 微生物学
- 细胞生物学 细胞生物学
背景情况:
- 缺乏有效的适应性免疫力对抗Chlamydia trachomatis,导致慢性感染和疾病.
- 树突细胞 (DCs) 对于在C. trachomatis感染期间激活T细胞至关重要.
- 尚不清楚C. trachomatis对DC子集 (cDC1s和cDC2s) 的T细胞原始化能力的影响.
研究的目的:
- 调查C. trachomatis如何影响树突细胞子集的活力和T细胞原始功能.
- 阐明由C. trachomatis引起的DC死亡的机制.
- 为了确定C. trachomatis诱导的DC死亡是否有助于免疫逃避.
主要方法:
- 使用C. trachomatis感染的小鼠模型.
- 在体外和体内评估DC活力和亡.
- 进行共同培养实验,以评估受感染的DCs的T细胞激活.
- 在受感染小鼠的DC上进行RNA测序.
- 使用人体DCs在体外验证的结果.
主要成果:
- 吸收C. trachomatis降低了cDC1和cDC2子集的生存能力,cDC1的死亡率更高.
- 电流死亡主要是亡的,并且依赖于Caspase-3/7和Bak1/Bax.
- 受感染的DCs显示T细胞激活能力受损,特别是影响CD8+T细胞原始化.
- RNA测序揭示了受感染小鼠的DC中细胞死亡途径的上调.
- 在人类DC中,C. trachomatis诱导细胞死亡.
结论:
- C. trachomatis 直接诱导树突细胞的亡,损害它们对T细胞发育的能力.
- 这种由病原体诱导的DC死亡可能代表C. trachomatis逃避适应性免疫系统的策略.
- 了解这种机制可能会为提高宿主免疫力以提高对克拉米迪亚感染的策略提供信息.
相关概念视频
01:22T Cell Activation and Clonal Selection
651
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...
651
01:27Cytotoxic T Cells-mediated Immune Response
841
Cytotoxic T cells are a vital component of the immune system. They have the remarkable ability to identify and target antigens on infected or abnormal cells. These antigens often originate from intracellular pathogens such as viruses or abnormal proteins cancer cells produce.
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...
841
01:26Sexually Transmitted Infections
269
Sexually transmitted infections (STIs) are diseases transmitted primarily through unsafe sexual interactions. Bacteria, viruses, or parasites cause them and can result in severe health complications if untreated.ChlamydiaThe bacterium Chlamydia trachomatis is responsible for the disease Chlamydia, the most common STI in the United States. This peculiar pathogen requires human cells to reproduce, residing intracellularly. The initial infection often goes unnoticed because it typically does not...
269
01:24T Cell Types and Functions
946
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...
946
01:40Cell-mediated Immune Responses
66.8K
Overview
66.8K