主要基因相容性复合体和特异性是CD8+ T细胞直接全反应的基础
Weiwen Zhang1, Fernanda M Roversi1, Anna B Morris2
1Department of Surgery, Emory University School of Medicine, Atlanta, Georgia, USA; Emory Transplant Center, Emory University School of Medicine, Atlanta, Georgia, USA.
概括
这项研究量化了对特定人类白细胞抗原 (HLA) 基因的全活性CD8+ T细胞,揭示了它们的前体频率和特异性. 这些发现提升了对移植拒绝的理解,并为患者监测提供了工具.
科学领域:
- 免疫学 免疫学 免疫学
- 移植免疫学 移植免疫学
背景情况:
- 在移植拒绝过程中,直接的全基因反应至关重要,涉及到接受者T细胞识别完整的主要基因相容性复合体 (pMHC) 复合体.
- 了解全活性CD8+T细胞,它们的频率,以及针对个别人白细胞抗原 (HLA) 基因的特异性是有限的.
研究的目的:
- 为了确定对单个HLA等位基因的全活性CD8+T细胞的前体频率和特异性.
- 为了识别由抗HLA-A*02:01 T细胞识别的免疫性特异性.
主要方法:
- 使用基于K562细胞的人工抗原呈现细胞 (aAPCs) 来表达特定的HLA等位基 (HLA-A*01:01,HLA-A*02:01,HLA-A*03:01).
- 开发了HLA-A*02:01的可交换的aAPC来测试的特异性.
- 分析了T细胞增殖,干扰素-玛分泌和细胞分解活性.
主要成果:
- 针对单个HLA等位体的全活性CD8+T细胞的前体频率在0.1%至0.5%之间.
- 全活性T细胞表现出显著的HLA特异性,交叉活性有限.
- 鉴定了两种免疫性产于的,其呈现的HLA-A*02:01被多个捐赠者的T细胞识别.
结论:
- 确定了直接全活性CD8+T细胞的前体频率和MHC特异性.
- 开发了一套新的工具包,用于研究全反应和识别特定的标.
- 这些发现提高了对移植排斥机制的理解,并使患者的监测成为可能.
相关概念视频
T Cell Activation and Clonal Selection
674
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...
674
Antigens Involved in Adaptive Immunity
463
An antigen is any substance the immune system identifies as foreign and potentially harmful to the body, prompting an immune response. Antigens have two functional properties: immunogenicity and reactivity. Immunogenicity is the ability of an antigen to stimulate a specific immune response. At the same time, reactivity describes the antigen's ability to react with the cells and antibodies produced in response to it.
Complete Antigens
Complete antigens possess both immunogenicity and...
Complete Antigens
Complete antigens possess both immunogenicity and...
463
Cell-mediated Immune Responses
67.4K
Overview
67.4K
Cytotoxic T Cells-mediated Immune Response
853
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...
853
Antigen Processing Pathways
943
MHC molecules are key players in the immune response, enabling T cells to recognize and respond to specific antigens. They are present on the surface of all nucleated cells in the body and are instrumental in presenting antigens to T cells and activating them. T cells recognize the MHC-antigen complex and initiate an immune response. MHC class I and MHC class II are two main types of MHC molecules, each associated with a distinct antigen processing pathway.
MHC Class I: Presenting Endogenous...
MHC Class I: Presenting Endogenous...
943
Tissue Transplantation
341
Tissue transplantation is a significant medical procedure involving the transfer of cells, tissues, or organs from a donor to a recipient, with the primary aim of restoring lost functions. This procedure is crucial in treating a broad spectrum of diseases, including kidney diseases, liver failure, heart disease, and certain types of cancers.
The Biology of Tissue Transplantation
The biology of tissue transplantation hinges on the Major Histocompatibility Complex (MHC) molecules. These molecules...
The Biology of Tissue Transplantation
The biology of tissue transplantation hinges on the Major Histocompatibility Complex (MHC) molecules. These molecules...
341


