肠道CD4-CD8αβ-TCRαβ+ T细胞在小鼠中充当耐受性抗原呈现细胞的功能
Yasuhiro Nemoto1,2, Ryo Morikawa3, Yuki Yonemoto3
1Department of Gastroenterology and Hepatology, Institute of Science Tokyo, Tokyo, Japan. ynemoto.gast@tmd.ac.jp.
Nature communications
|August 1, 2025
概括
肠道中的双阴性T (DNT) 细胞捕获光线抗原并迁移到淋巴结,通过MHC-II.II呈现它们. 这一过程维持了肠道的免疫耐受性,缺陷可能与炎症性肠病有关.
科学领域:
- 免疫学 免疫学 免疫学
- 胃肠病学 胃肠病学
- 细胞生物学 细胞生物学
背景情况:
- 肠道粘膜含有多样化的T淋巴细胞种群,包括双阴性T (DNT) 细胞.
- DNT细胞存在于肠道的内皮层和自身膜.
研究的目的:
- 为了研究小鼠小肠中DNT细胞的功能和抗原呈现能力.
- 探索DNT细胞在维持肠道免疫平衡中的作用及其在炎症性肠病中的潜在参与.
主要方法:
- 追踪DNT细胞运动性和抗原捕获通过上皮屏障.
- 分析DNT细胞迁移到中腔淋巴结 (MLN) 和皮耶斑块 (PP).
- 评估DNT细胞上的MHC-II和共刺激分子表达.
- 通过对CD4+T细胞的抗原呈现来研究DNT细胞的耐受性功能.
- 利用T细胞中MHC-II的条件除来研究其在肠道炎症中的作用.
主要成果:
- 鼠标肠道DNT细胞具有运动性,并捕获光线抗原.
- DNT细胞迁移到MLN和PP,上调MHC-II表达.
- 通过DNT细胞介导的抗原呈现能耐受抗原特异的原始CD4+T细胞.
- 在T细胞中MHC-II的有条件切除会逆转DNT细胞诱导的耐受性,导致对肠道炎症的过敏敏感性.
- 克罗恩病患者的肠道T细胞与健康对照组相比,显示HLA-DR表达减少.
结论:
- MHC-II+ DNT 细胞在肠道免疫恒温中发挥着至关重要的作用.
- 功能失调的DNT细胞活动可能会导致炎症性肠病的发病.
相关概念视频
T Cell Activation and Clonal Selection
4.7K
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...
4.7K
T Cell Types and Functions
1.4K
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...
1.4K
Cytotoxic T Cells-mediated Immune Response
2.0K
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...
2.0K
Cell-mediated Immune Responses
72.7K
Overview
72.7K
Antigen Presenting Cells
2.1K
The immune system is a complex network of cells and molecules that protects the body from foreign invaders. T cells, a type of white blood cell, play a crucial role in this process. They recognize and attack foreign substances, such as pathogens, that enter the body.
T cells require the help of antigen-presenting cells (APCs), which process foreign antigens into smaller fragments that can be recognized by T cells. These APCs are highly specialized cells that efficiently internalize antigens...
T cells require the help of antigen-presenting cells (APCs), which process foreign antigens into smaller fragments that can be recognized by T cells. These APCs are highly specialized cells that efficiently internalize antigens...
2.1K


