相关实验视频
Updated: Jun 6, 2025
06:56
Isolation of Double Negative αβ T Cells from the Kidney
Published on: May 16, 2014
12.3K
由于LTβR缺乏,导致淋巴结无形成和B细胞分化受损
Bernhard Ransmayr1,2,3, Sevgi Köstel Bal1,2,3, Marini Thian1,2,3
1St. Anna Children's Cancer Research Institute, Vienna, Austria.
Science immunology
|November 22, 2024
概括
淋巴毒素β受体 (LTβR) 基因的突变通过阻止二级淋巴体器官的形成,导致严重的免疫缺陷. 这突显了树皮细胞在免疫系统发育中的关键作用.
科学领域:
- 免疫学 免疫学 免疫学
- 遗传学 是一个遗传学.
- 发展生物学 发展生物学
背景情况:
- 二级淋巴体器官 (SLOs) 对于适应性免疫至关重要,促进免疫细胞相互作用和B细胞分化.
- 功能性缺血症,桃体缺失和淋巴结无形成导致反复感染,表明严重的免疫缺陷.
研究的目的:
- 为了研究一种严重的先天性免疫错误的遗传基础,这种免疫错误的特征是缺少SLOs.
- 阐明淋巴毒素β受体 (LTβR) 信号传导在SLO和适应性免疫系统的发展和功能中的作用.
主要方法:
- 研究了来自两个家庭的三名患者,他们有SLO缺乏症的临床表现.
- 进行基因分析以确定LTBR基因中的突变.
- 评估免疫细胞种群和功能,包括B细胞,T辅助细胞和免疫球蛋白水平.
- 使用了ex vivo共同培养系统来评估B细胞分化潜力.
主要成果:
- 在所有受影响的患者中,确定了编码LTβR的LTBR中的双性功能丧失突变.
- 由于LTβR缺乏,导致低血糖球蛋白血症,减少记忆B细胞,调节性T细胞和毛囊T辅助细胞.
- 在实验室中,B细胞分化正常,这表明缺陷是由于受损的树皮细胞相互作用而不是内在的B细胞异常造成的.
结论:
- 在人类中,LTβR信号传递对于SLOs的发展和维护至关重要.
- LTβR 缺陷代表了一种新的免疫系统天生的错误,主要是由影响 SLO 形成和功能的侧膜缺陷引起的.
- 这项研究强调了肌体免疫细胞相互作用在编排适应性免疫中的关键作用.
相关概念视频
01:23Cells of the Adaptive Immune Response
964
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...
964
01:24B Cell Activation and Differentiation
1.6K
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...
1.6K
01:20Special Features of Adaptive Immunity
756
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,...
756
01:40Cell-mediated Immune Responses
67.1K
Overview
67.1K
01:24T Cell Types and Functions
954
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...
954