基于来自 γδ-T 细胞的细胞外囊泡的瘤疫苗具有双重的抗瘤活性
Xiwei Wang1, Yanmei Zhang1, Yuet Chung1
1Department of Paediatrics & Adolescent Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China.
Journal of extracellular vesicles
|September 1, 2023
概括
来自马-三角形T细胞 (γδ-T-EVs) 的细胞外囊泡 (EVs) 显示出作为癌症疫苗的希望. 将瘤抗原加载到γδ-T-EV中可以增强抗瘤免疫力和疗效,为癌症控制提供了一种标准化的方法.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 生物技术是生物技术.
背景情况:
- 玛-三角形T细胞 (γδ-T细胞) 具有双重的抗瘤活性,直接杀死瘤细胞并促进抗瘤免疫力.
- 来自γδ-T细胞 (γδ-T-EVs) 的细胞外囊泡 (EVs) 继承了这些抗瘤特性.
- 作为癌症治疗的疫苗平台,gδ-T-EVs的潜力在很大程度上仍未被探索.
研究的目的:
- 研究 γδ-T-EVs 对抗原呈现细胞的免疫辅助作用.
- 设计和评估一种基于瘤相关抗原 (TAA) 的基于 γδ-T-EVs 的疫苗.
- 为了比较基于全源和自身的gδ-T-EVs的疫苗的疗效,并对树突细胞EVs (DC-EVs) 进行基准测试.
主要方法:
- 用γδ-T-EVs对抗原呈现细胞进行治疗,以评估免疫调节.
- 通过结合TAAs开发基于γδ-T-EVs的疫苗.
- 评估疫苗诱导的T细胞反应,直接的抗瘤作用和瘤细胞亡.
- 基于γδ-T-EVs的全源和自身疫苗的比较分析,以及基于γδ-T-EVs的疫苗与基于DC-EVs的疫苗.
主要成果:
- γδ-T-EVs增强了抗原呈现细胞功能,包括增加了抗原呈现和共刺激分子的表达和促炎细胞因子分泌.
- 与未经修改的γδ-T-EVs相比,基于TAA载荷的γδ-T-EVs的疫苗显著提高了瘤特异性T细胞反应.
- 疫苗方案显示了直接的抗瘤作用和诱导瘤细胞亡.
- 基於全基性 γδ-T-EVs 的疫苗表现出与自身免疫疫苗相匹配的预防和治疗抗瘤效果,并且表现优于基於 DC-EVs 的疫苗.
结论:
- γδ-T-EVs具有免疫辅助特性,有利于疫苗开发.
- 载有TAA的基于gδ-T-EVs的疫苗有效增强抗瘤免疫力和直接杀死瘤细胞.
- 基于全基性gδ-T-EVs的疫苗为癌症免疫疗法提供了一个标准化和临床可行的平台,显示出比基于DC-EVs的疫苗更高的疗效.
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