巨细胞通过VISTA抑制三阴性乳腺癌中CD8+T细胞细胞毒性功能
Maidinaimu Abudula1, Yuliana Astuti1, Meirion Raymant1
1Department of Molecular and Clinical Cancer Medicine, University of Liverpool, Liverpool, UK.
British journal of cancer
|May 2, 2025
概括
在三阴性乳腺癌 (TNBC) 中阻断V域Ig抑制T细胞激活 (VISTA) 增强了抗瘤免疫力. 这种免疫检查点阻塞会逆转巨细胞的免疫抑制,并增强T细胞活性,提供了一个有前途的治疗策略.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 癌症免疫疗法癌症免疫疗法
背景情况:
- 三阴性乳腺癌 (TNBC) 仍然是一个挑战,免疫疗法显示出希望.
- T细胞激活的V域Ig抑制剂 (VISTA) 是一种免疫检查点,与TNBC有关.
- 目前尚不完全了解VISTA在TNBC中的确切作用和治疗潜力.
研究的目的:
- 研究VISTA表达及其对TNBC瘤免疫微环境的影响.
- 在临床前TNBC模型中评估VISTA阻塞的治疗疗效.
主要方法:
- 在人类TNBC样本和小鼠模型中分析VISTA表达的分析.
- 功能性测试评估VISTA阻断对巨细胞和CD8+T细胞的影响.
- 检查免疫细胞透,激活和表型.
主要成果:
- 维斯塔在TNBC组织中被上调,主要表达在瘤透的巨细胞和中性粒细胞上.
- 维斯塔阻塞逆转了巨细胞的免疫抑制表型,并增强了CD8+ T细胞的透和激活.
- 针对巨细胞的VISTA改善了它们的免疫刺激功能,并减少了它们对T细胞的抑制作用.
结论:
- 维斯塔封锁有效地增强了TNBC中的抗瘤免疫反应.
- 这些发现支持开发用于TNBC治疗的VISTA向疗法.
相关概念视频
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
Cytotoxic T Cells-mediated Immune Response
720
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...
720


