CD4+ T细胞免疫力依赖于一种内在的干细胞类程序
Dawei Zou1,2, Zheng Yin3,4, Stephanie G Yi5,6
1Immunobiology & Transplant Science Center, Department of Surgery, Houston Methodist Research Institute, Houston Methodist Hospital, Houston, TX, USA.
Nature immunology
|January 3, 2024
概括
研究人员在CD4+T细胞中发现了一种类似干细胞的程序,可以控制移植时的免疫反应. 该计划涉及TCF1hi效应器前体细胞,这些细胞补充效应器细胞,对于移植排斥和潜在的免疫治疗点至关重要.
科学领域:
- 免疫学 免疫学 免疫学
- 移植免疫学 移植免疫学
- 细胞免疫学 细胞免疫学
背景情况:
- CD4+ T 细胞对免疫反应至关重要,但控制它们长期免疫力的分子机制尚未完全理解.
- 了解这些机制对于推进基于T细胞的免疫疗法和管理移植结果至关重要.
研究的目的:
- 在移植模型中识别调节CD4+T细胞免疫力的分子程序.
- 阐明 CD4+ T 细胞自我更新和效应因子分化背后的机制,在全移植排斥的背景下.
主要方法:
- 在移植模型中对CD4+T细胞单细胞转录组分析.
- 收养转移实验以评估T细胞功能和全移植排斥.
- 在T细胞中关键的转录因子 (IRF4) 和酶 (LDHA) 的基因操纵 (删除).
主要成果:
- 原始 CD4+ T 细胞分化为 TCF1hi 效应前体 (TEP) 细胞和 TCF1-CXCR6+ 效应细胞.
- TCF1hi TEP 细胞具有自我更新和分化潜力,不断供应用于全移植排斥所需的效应细胞.
- IRF4和LDHA对于效应体差异化至关重要;它们的删除导致移植接受.
结论:
- 一个由TCF1,IRF4和LDHA控制的类似干细胞的程序调节了CD4+T细胞的自我更新和移植中的效应器功能.
- 针对该计划提供了潜在的治疗策略,用于调节移植和免疫治疗中的T细胞反应.
相关概念视频
T Cell Activation and Clonal Selection
740
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...
740
Cells of the Adaptive Immune Response
990
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...
990
T 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
Renewal of Intestinal Stem Cells
2.6K
The intestinal epithelial lining rapidly renews every 4 to 5 days. The renewal is facilitated by intestinal stem cells (ISCs) located at the base of the crypt– a gland located at the bottom of each villus. ISCs divide asymmetrically to form new stem cells and progenitor daughter cells. The daughter cells are called transit-amplifying (TA) cells which move upwards along the crypt and either differentiate into absorptive cells– the enterocytes or secretory cells– including the...
2.6K
Cell-mediated Immune Responses
68.3K
Overview
68.3K
Regulation of Hematopoietic Stem Cells
3.2K
All blood and immune cells are produced from the multipotent hematopoietic stem cells (HSCs) by the process of hematopoiesis. However, they all have a limited life span. In addition, many are depleted in immune surveillance or combatting an injury or infection. This makes blood one of the most regenerative tissues. Hematopoiesis helps replenish these blood and immune cells, restoring the body's normal functioning. However, overproduction of blood and immune cells can make them cancerous or...
3.2K


