自体T细胞无抗原呈现系统揭示了hCMV特异性NK细胞反应
Maria O Ustiuzhanina1, Maria A Streltsova1, Nikita D Timofeev1
1Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 Moscow, Russia.
Cells
|March 27, 2024
概括
自然杀手 (NK) 细胞控制人类细胞巨乳病毒 (hCMV) 感染. 一个新的系统揭示了hCMVLFL激活NK细胞,增强IFNγ生产和扩散在阳性人群中.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 细胞生物学 细胞生物学
背景情况:
- 自然杀手 (NK) 细胞对于通过先天性和适应性免疫反应控制人类细胞巨乳病毒 (hCMV) 感染至关重要.
- 由hCMV衍生的VMAPRTLFL (LFL) 特异地激活NKG2C+ NK细胞,突出显示其作为免疫激活剂的潜力.
研究的目的:
- 建立一种自主NK细胞刺激系统,使用没有T淋巴细胞或外源细胞因子的LFL来研究本地环境中的hCMV特异反应.
- 研究LFL诱导的NK细胞反应,包括IFNγ产生,脱粒化,增殖和潜在的信号通路,以及转录基因变化.
主要方法:
- 开发一种由hCMV衍生的LFL刺激的自身NK细胞培养系统.
- 对NK细胞反应的分析:IFNγ产生,脱粒化,增殖,细胞因子概况和信号通路 (PI3K,Ras/Raf/Mek).
- 扩大NK细胞的转录组分析以确定适应性基因表达和代谢激活.
主要成果:
- 来自高抗hCMV-IgG水平的hCMV-阳性个体的NK细胞在LFL刺激时,与血清阴性或低阳性捐赠者相比,显示出增强的IFNγ产生,脱粒化,激活和增殖.
- 由LFL诱导的IFNγ产生依赖PI3K和Ras/Raf/Mek信号通路,独立于外部细胞因子.
- 扩大NK细胞的转录组分析显示,适应性基因表达和代谢激活增加,这表明了抗原特异性反应.
结论:
- 开发的自身系统有效地模拟了hCMV特异性的NK细胞反应,在阳性人群中显示出增强的激活和扩散.
- 这项研究阐明了参与LFL诱导NK细胞激活的关键信号通路,并确定了扩展的hCMV特异性NK细胞中的适应性免疫特征.
- 这种模型系统有可能用于识别和表征抗原特异性NK细胞,以进一步研究hCMV免疫力.
关键词:
在ERK1/2中.在HLA-E的基础上,HLA-EIFNγ IFNγ 的意思在 NKG2C 中,NKG2C 是 NKG2C 的代号.在RNAseqqq中使用.细胞因子 细胞因子在CMV中,hCMV是CMV.记忆NK细胞 记忆NK细胞更多相关视频
08:52Generation of Multivirus-specific T Cells to Prevent/treat Viral Infections after Allogeneic Hematopoietic Stem Cell Transplant
Published on: May 27, 2011
17.2K
13:18Artificial Antigen Presenting Cell aAPC Mediated Activation and Expansion of Natural Killer T Cells
Published on: December 29, 2012
18.1K
相关概念视频
Immune Response Against Viral Pathogens
779
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...
779
Antigens Involved in Adaptive Immunity
489
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...
489
T Cell Activation and Clonal Selection
721
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...
721
Cytotoxic T Cells-mediated Immune Response
907
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...
907
