循环的瘤细胞被外细胞囊衍生的CD45屏蔽,避免T细胞的攻击,使得转移
Chuan Yang1, Xueping Wang1, Kenneth K W To2
1State Key Laboratory of Oncology in South China, Guangdong Provincial Clinical Research Center for Cancer, Sun Yat-sen University Cancer Center, Guangzhou, 510060, P.R. China.
Signal transduction and targeted therapy
|April 4, 2024
概括
一个由细胞外囊 (EV) 衍生的CD45覆盖的循环瘤细胞 (CTC) 亚群逃避免疫攻击. 这些CD45+CTC显示出更强的转移潜力,突出了预防癌症传播的新目标.
科学领域:
- 癌症生物学 癌症生物学
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
背景情况:
- 循环瘤细胞 (CTC) 是癌症转移的关键驱动因素.
- 了解CTC异质性和免疫逃避机制对于开发抗转移疗法至关重要.
- 目前关于CTC如何避免免疫监测的知识仍然不完整.
研究的目的:
- 为了确定负责免疫逃避和转移的CTC亚群.
- 阐明CTC抵抗免疫细胞介导消除的机制.
- 探索针对这种免疫逃避性CTC亚群的治疗潜力.
主要方法:
- 使用先进的细胞表面标记物识别和表征CTC亚群.
- 在体内和体外测试以评估CTC转移潜力和免疫逃避能力.
- 涉及细胞间相互作用和信号通路分析的机制研究.
主要成果:
- 鉴定出一个不同的CTC亚群,CD45+CTC,被细胞外囊泡 (EV) 衍生的CD45屏蔽.
- 与CD45-CTC相比,CD45+CTC表现出对T细胞中介杀伤的抵抗力,并表现出增强的转移潜力.
- 较高的CD45+CTC百分比与转移增加和患者预后较差相关.
- 瘤细胞和T细胞之间的细胞间CD45-CD45同型相互作用被证明可以抑制T细胞受体信号,导致免疫逃避.
结论:
- 细胞外囊泡 (EV) 衍生的CD45保护CTCs,使免疫逃避并促进转移.
- CD45+ CTCs由于其增强的转移潜力和抑制抗瘤免疫力的能力,构成重大威胁.
- 通过CTC准EV衍生的CD45的内化,为预防癌症转移提供了一个有前途的治疗策略.
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