DOK1和DOK2调节CD8T细胞信号传递和记忆形成,而不会影响瘤细胞的杀死
Vladimir Laletin1, Pierre-Louis Bernard1, Camille Montersino2
1Centre de Recherche en Cancérologie de Marseille, CRCM, Immunity and Cancer Team, Institut Paoli-Calmettes, Inserm, CNRS, Aix Marseille University, Marseille, France.
Scientific reports
|July 2, 2024
概括
在CD8+ T细胞中削减DOK1和DOK2蛋白质可以增强效应器记忆形成和T细胞受体信号传递. 然而,这种消耗在体外并没有改善抗癌活性.
科学领域:
- 免疫学 免疫学 免疫学
- 癌症生物学 癌症生物学
- 分子生物学分子生物学
背景情况:
- 向细胞内抑制蛋白质是提高CD8+T细胞抗瘤功效的关键策略.
- DOK1和DOK2是细胞内蛋白质,可以抑制T细胞受体 (TCR) 信号传递.
研究的目的:
- 研究DOK1和DOK2在CD8+T细胞功能和癌症进展中的作用.
- 评估DOK1和DOK2耗尽的潜力,以改善基于CD8+T细胞的癌症疗法.
主要方法:
- 在野生型和Dok1/Dok2双淘汰赛 (DKO) 小鼠中建立了一个转基因T细胞受体小鼠模型 (pmel-1 TCR Tg).
- 在实验室中分析了CD8+ T细胞种群,TCR信号通路 (pAKT,pERK) 和对黑色素瘤细胞的细胞毒性活性.
主要成果:
- 在CD8+ T细胞中DOK1和DOK2的耗尽增加了CD3 mAb刺激后的效应记忆T细胞百分比和TCR信号级联激活 (pAKT,pERK).
- 增强的TCR信号特定于预刺激的CD8+T细胞,而未在原始细胞中观察到.
- 尽管信号增强,但DOK1/DOK2贫乏的CD8+ T细胞在体外没有显示增加激活或细胞毒性对黑色素瘤细胞的能力.
结论:
- DOK1和DOK2蛋白质在CD8+T细胞中起着新的抑制作用,特别是在长时间刺激后.
- DOK1和DOK2的耗尽增强了T细胞信号传递的特定方面,但并没有转化为改善体外抗瘤功能.
相关概念视频
T Cell Activation and Clonal Selection
699
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...
699
T Cell Types and Functions
998
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...
998
Receptor Downregulation in MVBs
2.0K
Multivesicular bodies (MVBs) are mature endosomes that sort ubiquitinated proteins and then fuse with lysosomes to degrade the sorted proteins. Epidermal growth factor (EGF) and its receptor (EGFR) form a complex that can be internalized through endocytosis, sorted into an MVB, and later degraded.
The EGFR can initiate signaling pathways that lead to cell proliferation, migration, and differentiation. Overexpression of EGFR stimulates cells to proliferate. Excessive EGFR...
The EGFR can initiate signaling pathways that lead to cell proliferation, migration, and differentiation. Overexpression of EGFR stimulates cells to proliferate. Excessive EGFR...
2.0K
Abnormal Proliferation
4.5K
Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the...
4.5K
Cytotoxic T Cells-mediated Immune Response
888
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...
888
Inhibition of Cdk Activity
4.7K
The orderly progression of the cell cycle depends on the activation of Cdk protein by binding to its cyclin partner. However, the cell cycle must be restricted when undergoing abnormal changes. Most cancers correlate to the deregulated cell cycle, and since Cdks are a central component of the cell cycle, Cdk inhibitors are extensively studied to develop anticancer agents. For instance, cyclin D associates with several Cdks, such as Cdk 4/6, to form an active complex. The cyclin D-Cdk4/6 complex...
4.7K


