HLA-DR1受限制的T细胞抗原识别结构模型
J B Rothbard1, R I Lechler, K Howland
1Laboratory of Molecular Immunology, Imperial Cancer Research Fund, London, England.
Cell
|February 26, 1988
概括
研究人员确定了两种关键的流感T细胞决定因素,一种在血凝素中,一种在矩阵蛋白中 (M1). 这些发现揭示了一种特定的螺旋形图案,对于在流感和其他过敏中对DR1-受限制的T细胞识别至关重要.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 分子生物学分子生物学
背景情况:
- 辅助T细胞在适应性免疫中起着至关重要的作用,识别由MHCII类分子呈现的抗原.
- 流感病毒蛋白质含有引起T细胞反应的表位,有助于病毒清除和免疫记忆.
- 人类白细胞抗原 (HLA) 类II等位基因,如HLA-DR1,限制T细胞对特定序列的识别.
研究的目的:
- 在流感病毒蛋白中识别和描述人类辅助T细胞的决定因素.
- 调查DR1限制T细胞对流感衍生的的识别的结构基础.
- 探索DR1受限T细胞表位识别中可泛化的动机的潜力.
主要方法:
- 感染过的L细胞被用来呈现抗原,并评估从流感血凝素和矩阵蛋白 (M1) 来决定T细胞的DR1限制.
- 进行了序列比较和对氨基酸与DR1和T细胞受体相互作用的分析.
- 混合被合成并通过T细胞克隆进行识别测试.
- 评估了DR1个体对含有已识别的动机的无草的反应.
主要成果:
- 在流感血素和矩阵蛋白 (M1) 中确定了两个人类辅助T细胞决定因素.
- 两种决定因素都被证明是DR1受限制的.
- 提出了一个共享的序列模式,可能采用螺旋形状,以解释DR1的特异性.
- 混合证实了相互作用模型,一个带有动机的拉格韦在DR1个体中引起了反应.
结论:
- 一个特定的序列图案,可能是螺旋形,是DR1-受限T细胞对流感表位体的识别的基础.
- 这种动图可能是DR1-受限T细胞决定体的一般特征,不仅仅是流感.
- 了解这些决定因素可以为传染病和过敏的疫苗设计和免疫疗法策略提供信息.
更多相关视频
相关概念视频
Cell-mediated Immune Responses
Overview
Special Features of Adaptive Immunity
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,...
Antigens Involved in Adaptive Immunity
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 reactivity.
Complete Antigens
Complete antigens possess both immunogenicity and reactivity.
Diversity of Antigen Receptors
Antigen receptors are essential components of the immune system crucial in defending the body against foreign invaders. These receptors are present on the surface of B and T cells, enabling them to recognize antigens and mount an appropriate immune response.
Before encountering any antigen, lymphocytes express these receptors. On B cells, the antigen receptor is a membrane-bound antibody molecule called BCR; on T cells, it is a T cell receptor or TCR. B and T cell receptors are composed of two...
Before encountering any antigen, lymphocytes express these receptors. On B cells, the antigen receptor is a membrane-bound antibody molecule called BCR; on T cells, it is a T cell receptor or TCR. B and T cell receptors are composed of two...
Antigen Processing Pathways
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...
T Cell Activation and Clonal Selection
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...


