在瘤微环境中,类似干细胞的祖先和终端分化的TFH类似CD4+的T细胞耗尽
Wenhao Zhou1, Shusuke Kawashima2, Takamasa Ishino3
1Department of Tumor Microenvironment, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan; Department of Immunology, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan; Department of Urology Surgery, Affiliated Hospital of North Sichuan Medical College, Nanchong, China.
Cell reports
|February 16, 2024
概括
免疫检查点抑制剂通过恢复耗尽的CD8+T细胞来提高抗瘤免疫力. 新的研究揭示了CXCL13驱动CD4+毛囊辅助T细胞透,增强癌细胞攻击和T细胞枯竭的洞察力.
科学领域:
- 免疫学 免疫学 免疫学
- 癌症生物学 癌症生物学
- T细胞生物学T细胞生物学
背景情况:
- 免疫检查点抑制剂 (ICI) 通过在瘤微环境 (TME) 中恢复耗尽的CD8+ T细胞来恢复抗瘤免疫力.
- 了解TME中T细胞子集的复杂相互作用对于优化癌症免疫治疗至关重要.
研究的目的:
- 调查CXCL13在TME中的T细胞动态中的作用,在抗瘤免疫反应期间.
- 描述癌症中CD4+毛囊辅助T (T_FH) 细胞的功能异质性和耗尽机制.
主要方法:
- 瘤透性淋巴细胞的单细胞RNA测序 (scRNA-seq).
- 使用小鼠癌症模型进行体内研究.
- 流细胞计和分子分析,以评估T细胞表型和功能.
主要成果:
- 通过耗尽的CD8+ T细胞高度表达的CXCL13,促进CD4+ T_FH细胞透到TME.
- 在TME中的T_FH细胞的一个子集表现出细胞毒性,直接准表达MHC-II的瘤细胞.
- 细胞毒性T_FH样细胞的特征是高LAG-3/BLIMP1和低TCF1表达,缺乏自我更新能力,与非细胞毒性T_FH细胞不同.
结论:
- 通过CXCL13介导的T_FH细胞透对抗瘤免疫有显著的贡献.
- T_FH细胞表现出功能性可塑性,具有明显的原生类和终端分化的细胞毒性子集,反映了CD8+ T细胞耗尽.
- 这些发现阐明了T细胞耗尽的新机制,并突出了T_FH类细胞作为与CD8+T细胞一起协调抗瘤免疫力的关键参与者.
相关概念视频
The Tumor Microenvironment
6.6K
Every normal cell or tissue is embedded in a complex local environment called stroma, consisting of different cell types, a basal membrane, and blood vessels. As normal cells mutate and develop into cancer cells, their local environment also changes to allow cancer progression. The tumor microenvironment (TME) consists of a complex cellular matrix of stromal cells and the developing tumor. The cross-talk between cancer cells and surrounding stromal cells is critical to disrupt normal tissue...
6.6K
Cancer Stem Cells and Tumor Maintenance
4.9K
Early diagnosis and treatment can often cure cancer. However, even with treatment, residual cells called cancer stem cells (CSC) might remain, often causing tumor recurrence. These cancer stem cells possess the potential for self-renewal and multi-lineage differentiation and are often responsible for the therapeutic resistance displayed in most cancers.
Cancer stem cells are thought to originate from tissue-specific normal stem cells or progenitor cells. The normal stem cells usually reside in...
Cancer stem cells are thought to originate from tissue-specific normal stem cells or progenitor cells. The normal stem cells usually reside in...
4.9K
T Cell Types and Functions
1.0K
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...
1.0K
T Cell Activation and Clonal Selection
732
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...
732
Tumor Immunotherapy
524
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.
524
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


