相关实验视频
Updated: Jul 25, 2026

08:32
Dissecting Innate Immune Signaling in Viral Evasion of Cytokine Production
Published on: March 2, 2014
病毒抗原的呈现是由主要基因相容性复合体中的基因控制的
V Cerundolo1, J Alexander, K Anderson
1Institute of Molecular Medicine, John Radcliffe Hospital, Headington, Oxford, UK.
Nature
|May 31, 1990
概括
研究人员确定了一种突变的人类细胞系 (LBL 721.174),通过主要基因相容性复合体 (MHC) I 类分子对细胞内病毒抗原的呈现受损. 这种缺陷局部存在于6号染色体上,影响抗原关联,并且可以通过暴露部分恢复.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 主体组织相容性复合体 (MHC) I类分子对于向细胞毒性T淋巴细胞呈现细胞内抗原至关重要.
- 在MHC I类抗原呈现中的缺陷与病毒和瘤细胞使用的免疫逃避策略有关.
- 了解这些缺陷为免疫监测和潜在的治疗目标提供了洞察力.
研究的目的:
- 鉴定一种新型突变人体细胞系 (LBL 721.174) 具有细胞内抗原呈现缺陷的特征.
- 调查观察到的抗原呈现缺陷背后的分子机制.
- 为了绘制对突变负责的基因位点.
主要方法:
- LBL 721.174突变细胞系的生成和表征.
- 流细胞计分析以评估MHC I类表面表达.
- 载量测试用于评估抗原呈现能力.
- 基因映射研究以确定缺陷的染色体位置.
主要成果:
- LBL 721.174细胞系通过MHC I类分子表现出细胞内病毒抗原的表达受损.
- 这些细胞在MHC I类分子的组装和表达中表现出缺陷.
- 对外源性表位的暴露部分恢复了MHC I类表达和功能.
- 这种遗传缺陷被映射到人类染色体6上主要基因相容性复合体 (MHC) 位点.
结论:
- 在LBL 721.174细胞系中,细胞内抗原与MHC I类分子的结合有缺陷.
- 这种缺陷类似于小鼠RMA-S突变,表明在抗原处理和呈现过程中保留了机制.
- 鉴定基因位点为研究人类免疫反应和相关疾病提供了有价值的工具.
相关概念视频
Cell-mediated Immune Responses
Overview
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.
Antigen Presenting Cells
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...
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...
Immune Response Against Viral Pathogens
The immune system's response to viral infections is a complex and coordinated process involving natural killer (NK) cells, T cell-mediated responses, and antibody-mediated responses.
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
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NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
Cytomegalovirus Disease
Cytomegalovirus (CMV) disease is caused by human cytomegalovirus, a double-stranded DNA virus of the Herpesviridae family. While primary CMV infection is often asymptomatic in immunocompetent individuals, the virus can cause severe disease in neonates and immunocompromised patients. CMV is the most common cause of congenital viral infection in the United States, and a major pathogen in solid organ and hematopoietic stem cell transplant recipients.CMV is transmitted via bodily fluids, sexual...

