CD8+组织内存T细胞与年龄相关的下降损害了抗瘤免疫力
Siyu Pei1,2, Xiuyu Deng2, Ruirui Yang3
1Department of Thoracic Surgical Oncology, Shanghai Lung Cancer Center, Shanghai Chest Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
Nature aging
|November 26, 2024
概括
衰老会通过阻碍组织内存T (TRM) 细胞的产生,损害CD8+ T细胞的抗瘤免疫力. 用IBFAR2准BFAR可以恢复TRM形成,并增强老年小鼠的抗瘤活性.
科学领域:
- 免疫学 免疫学 免疫学
- 衰老的研究研究.
- 癌症免疫学 癌症免疫学
背景情况:
- 衰老显著影响免疫系统对抗瘤的能力.
- 与年龄相关的抗瘤免疫力下降背后的机制尚未完全理解.
- CD8+ T 细胞对于有效的抗瘤反应至关重要.
研究的目的:
- 研究衰老对非淋巴细胞组织中CD8+T细胞功能的影响.
- 确定负责与年龄相关的T细胞功能障碍的分子机制.
- 探索恢复老年人抗瘤免疫力的治疗策略.
主要方法:
- 利用小鼠模型研究 CD8+ T 细胞在衰老中的反应.
- 研究了细胞灭亡调节器BFAR在老年CD8+T细胞中的作用.
- 采用了Bfar淘汰赛,并开发了一种用于治疗干预的BFAR抑制剂 (iBFAR2).
- 在瘤微环境中评估TRM生成和抗瘤活性.
主要成果:
- 衰老会损害小鼠的CD8+T细胞产生组织内存T细胞 (TRM),这种现象在人类肺腺癌中观察到.
- 在老化的CD8+T细胞中富含BFAR,抑制JAK2/STAT1信号传递,限制TRM重编程.
- 通过淘汰赛或IBFAR2治疗准BFAR恢复了TRM生成和增强了抗瘤活性.
- 用IBFAR2进行的治疗干预在老年小鼠和抗PD-1耐药模型中抑制了瘤生长.
结论:
- 由BFAR介导的TRM生成的限制是老年CD8+T细胞功能障碍的一个关键机制.
- 在老年患者中,IBFAR2显示了恢复抗瘤免疫力的翻译潜力.
- 这种方法也可能有利于抗PD-1疗法耐药的患者.
相关概念视频
Cell-mediated Immune Responses
67.1K
Overview
67.1K
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
T Cell Activation and Clonal Selection
669
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...
669
Tumor Immunotherapy
480
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.
480
T Cell Types and Functions
954
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...
954
Replicative Cell Senescence
3.6K
Replicative cell senescence is a property of cells that allows them to divide a finite number of times throughout the organism's lifespan while preventing excessive proliferation. Replicative senescence is associated with the gradual loss of the telomere — short, repetitive DNA sequences found at the end of the chromosomes. Telomeres are bound by a group of proteins to form a protective cap on the ends of chromosomes. Embryonic stem cells express telomerase — an enzyme that adds...
3.6K


