恒常性自我MHC-I识别调节成熟的肺自然杀手细胞的抗转移功能
Ka He1, Yui Shinzawa1, Sadahiro Iwabuchi2
1Section of Host Defences, Institute of Natural Medicine, University of Toyama, Sugitani 2630, Toyama-shi, Toyama, 930-0194, Japan.
Biochemical and biophysical research communications
|November 11, 2024
概括
阻止自我MHC-I增强了自然杀手 (NK) 细胞的抗转移功能. 这种阻断会增加NK细胞的细胞毒性和IFN-γ的产生,这对于控制瘤生长至关重要.
科学领域:
- 免疫学 免疫学 免疫学
- 癌症生物学 癌症生物学
- 具有天生的免疫力.
背景情况:
- 自然杀手 (NK) 细胞是控制瘤生长和转移的关键先天性免疫细胞.
- 周围组织中的成熟NK细胞表达抑制受体,识别自我主要基因相容性复合体I类 (MHC-I).
- 恒温MHC-I识别在维持成熟NK细胞在组织中的作用尚不清楚.
研究的目的:
- 调查恒温MHC-I识别在成熟的肺NK细胞反应中的作用.
- 在肺转移模型中分析阻断自我MHC-I对NK细胞活性的影响.
主要方法:
- 使用了一种泛抗MHC-I阻断单克隆抗体 (抗MHC-I).
- 使用B16F10黑色素瘤的实验性肺转移模型.
- 评估NK细胞数量,细胞毒性,IFN-γ产生和激活受体表达 (DNAM-1).
主要成果:
- 抗MHC-I治疗以NK细胞和IFN-γ依赖的方式显著抑制了肺转移.
- 阻断平稳的MHC-I识别增加了成熟的肺NK细胞细胞毒性和IFN-γ的产生,而不是细胞数.
- 包括DNAM-1在内的激活受体的基因表达被上调,增强的细胞毒性依赖DNAM-1.
结论:
- 恒温的MHC-I自我识别抑制了成熟的肺NK细胞的抗转移功能.
- 阻断自我MHC-I可以通过升高DNAM-1等激活受体的调节来增强NK细胞的效应器功能.
- 针对MHC-I识别提供了一个潜在的策略,以促进NK细胞介导的抗瘤免疫力.
相关概念视频
Cells of the Innate Immune Response
1.6K
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...
1.6K
Antigens Involved in Adaptive Immunity
460
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...
460
Cytotoxic T Cells-mediated Immune Response
849
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...
849
Immune Surveillance by NK Cells and Phagocytes
1.4K
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...
1.4K
Cell-mediated Immune Responses
67.2K
Overview
67.2K
Immune Response Against Viral Pathogens
752
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...
752


