天然杀手细胞充当静剂,调节抗病毒T细胞
Stephen N Waggoner1, Markus Cornberg, Liisa K Selin
1Department of Pathology and Program in Immunology and Virology, University of Massachusetts Medical School, Worcester, Massachusetts 01655, USA.
Nature
|November 22, 2011
概括
自然杀手 (NK) 细胞调节病毒感染中的T细胞反应. 在LCMV小鼠模型中,NK细胞控制T细胞枯竭和病理,充当修静剂来控制病毒的持续性和疾病严重程度.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 传染性疾病 传染性疾病
背景情况:
- 抗病毒T细胞会影响C型肝炎病毒 (HCV) 和人类免疫缺陷病毒 (HIV) 感染的结果.
- 自然杀手 (NK) 细胞与艾滋病毒和HCV的进展有关,这表明其作用超出了直接的病毒溶解.
- NK细胞可能具有免疫调节功能,间接影响T细胞反应.
研究的目的:
- 研究NK细胞在T细胞依赖的病毒持久性和免疫病理学中的作用.
- 阐明NK细胞在病毒感染的背景下调节T细胞反应的机制.
- 检查NK细胞对CD8T细胞功能和衰竭的影响.
主要方法:
- 使用了淋巴细胞胆膜炎病毒 (LCMV) 鼠标模型,这是艾滋病毒和HCV感染的既定模型.
- 在病毒感染期间分析了NK细胞,CD4 T细胞和CD8 T细胞之间的相互作用.
- 评估了不同病毒剂量对NK细胞活性和疾病结局的影响.
主要成果:
- 证明了三方相互作用,其中激活的NK细胞消除激活的CD4T细胞,影响CD8T细胞功能和疲劳.
- 观察到,在高剂量的病毒中,NK细胞通过使T细胞耗尽和病毒持久性,防止致命的病理.
- 发现,在中等病毒剂量下,NK细胞矛盾地促进了致命的T细胞介导病理.
结论:
- NK 细胞的功能是修静剂,调节 CD4 T 细胞对抗病毒 CD8 T 细胞的支持.
- 通过控制T细胞的反应,NK细胞活动极大地调节病毒的发病和持续性.
- 了解NK细胞动态对于管理病毒感染和相关免疫病理学至关重要.
相关概念视频
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...
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...
Cytotoxic T Cells-mediated Immune Response
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...
Cells of the Innate Immune Response
The innate immune response is an immediate and non-specific response against pathogens, acting swiftly to prevent the spread of infections. The primary cells involved in this response are phagocytes and natural killer (NK) cells.
Phagocytes
Phagocytes police the peripheral tissues by removing cellular debris and responding to the invasion of foreign substances or pathogens. Many phagocytes attack and remove microorganisms even before lymphocytes detect them. The human body has two general...
Phagocytes
Phagocytes police the peripheral tissues by removing cellular debris and responding to the invasion of foreign substances or pathogens. Many phagocytes attack and remove microorganisms even before lymphocytes detect them. The human body has two general...
T Cell Types and Functions
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...
Immune Surveillance by NK Cells and Phagocytes
Immune surveillance is an integral part of the innate immune system, involving the continuous monitoring of peripheral tissues to detect and respond to pathogens, infected cells, or cancerous cells. This surveillance is conducted primarily by natural killer (NK) cells and phagocytes, which employ distinct but complementary mechanisms to identify and eliminate threats.
Natural Killer Cells: The Fast Responders
NK cells are large granular lymphocytes found in the blood and lymphatic system. These...
Natural Killer Cells: The Fast Responders
NK cells are large granular lymphocytes found in the blood and lymphatic system. These...
Cell-mediated Immune Responses
Overview

