工程外膜囊泡增强固体瘤CAR-T细胞疗法
Xianjun Li1,2,3, Xuehan Li1,4, Jiaqi Shi1,5
1Heilongjiang Province Key Laboratory of Molecular Oncology, Harbin, China.
Nature biomedical engineering
|January 7, 2026
概括
研究人员开发了一种细菌外膜囊泡 (OMV) 平台,以改善固体瘤的仿真抗原受体 (CAR) -T细胞疗法. 这种方法可以逆转免疫抑制,并提高CAR-T细胞对异质瘤的有效性.
科学领域:
- 免疫学 免疫学 免疫学
- 生物技术是生物技术.
- 在瘤学瘤学.
背景情况:
- 化学抗原受体 (CAR) -T细胞疗法在固体瘤中面临挑战,包括免疫抑制瘤微环境和可变抗原表达.
- 细菌外膜囊泡 (OMVs) 是免疫调节的,适合于工程制造的药物输送.
研究的目的:
- 开发一种基于细菌OMV的平台,BROAD-CAR,用于逆转免疫抑制并优化固体瘤的CAR-T细胞疗法中的抗原呈现.
- 通过向PD-1/PD-L1通路和修改瘤抗原来增强CAR-T细胞的抗瘤活性和扩张.
主要方法:
- 工程化细菌外膜囊泡 (OMVs) 来表达抗PD-L1抗体并为CARs提供向抗原等离子体.
- 利用BROAD-CAR平台阻止PD-1/PD-L1信号传输并在现场修改瘤抗原.
- 在试验室和体内乳腺癌小鼠模型中评估了BROAD-CAR与CAR-T细胞结合的疗效.
主要成果:
- BROAD-CAR平台有效地阻断了PD-1/PD-L1信号通路,增强了CAR-T细胞的抗瘤活性和增殖.
- BROAD-CAR改善了免疫抑制瘤微环境,从而改善了CAR-T细胞的扩张.
- 该平台促进了局部瘤抗原修饰,使抗原异质和抗原阴性瘤的CAR-T细胞介导溶解成为可能,并抑制了复发和转移.
结论:
- 基于细菌OMV的BROAD-CAR平台提供了一种安全有效的策略,以克服CAR-T细胞治疗在固体瘤中的关键局限性.
- 这种方法提高了CAR-T细胞的疗效,并扩大了适用性,特别是在抗原异质和抗原阴性固体瘤中.
- BROAD-CAR代表了改善CAR-T细胞治疗结果在具有挑战性的固体瘤环境中的有希望的进步.
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