针对皮肤黑色素瘤的CD4+ T细胞免疫包括多方面的MHC II依赖反应
Emma G Bawden1,2, Teagan Wagner1, Jan Schröder3
1Department of Microbiology and Immunology, University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia.
Science immunology
|January 19, 2024
概括
细胞毒性CD4+ T细胞对于抗瘤免疫至关重要,可以通过TNF-α和FasL消除黑色素瘤. 抗原呈现细胞和黑色素瘤细胞上的主要基因相容性复合体II类 (MHC II) 表达驱动了这种反应.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 细胞生物学 细胞生物学
背景情况:
- CD4+ T 细胞通过 CD8+ T 细胞的帮助,传统上支持抗瘤免疫.
- 新兴的临床证据表明CD4+T细胞在癌症免疫中具有直接的细胞毒性作用.
研究的目的:
- 研究CD4+T细胞介导的抗瘤免疫对皮肤黑色素瘤的机制.
- 阐明主要基因相容性复合体II类 (MHC II) 在调节这些CD4+T细胞反应中的作用.
主要方法:
- 在体内研究中使用了一种 ортотоп性黑色素瘤小鼠模型.
- 采用静脉内成像来观察T细胞与瘤的相互作用.
- 分析了CD4+ T细胞的细胞毒性机制和细胞因子参与.
主要成果:
- CD4+ T细胞与含有瘤残骸的MHC II+抗原呈现细胞以及直接识别的MHC II+黑色素瘤细胞相互作用.
- CD4+ T细胞独立于其他淋巴细胞抑制或根除瘤,使用TNF-α和FasL,而不是穿孔素.
- 干扰素-γ是必不可少的,它直接作用于黑色素瘤细胞,间接通过骨髓细胞氧化合成酶诱导作用.
结论:
- 在控制皮肤黑色素瘤方面,MHC II依赖的CD4+T细胞免疫力发挥着重要作用.
- CD4+ T 细胞通过多种机制产生抗瘤作用,包括细胞因子分泌和直接细胞毒性.
- 准MHC II-CD4+ T细胞轴为黑色素瘤免疫治疗提供了一个有前途的策略.
相关概念视频
Antigens Involved in Adaptive Immunity
497
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...
497
T Cell Activation and Clonal Selection
739
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...
739
Cell-mediated Immune Responses
68.3K
Overview
68.3K
Cytotoxic T Cells-mediated Immune Response
921
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...
921
Antigen Processing Pathways
1.0K
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...
1.0K
Tumor Immunotherapy
527
Immunotherapy is a treatment that boosts or manipulates the immune system to fight diseases, including cancer. For instance, by stimulating an immune response through vaccinations against viruses that cause cancers, like hepatitis B virus and human papillomavirus, these diseases can be prevented. Nonetheless, some cancer cells can avoid the immune system due to their rapid mutation and division. The immune response to many cancers involves three phases: elimination, equilibrium, and escape.
527


