纳米酶武装的CAR-NK细胞通过缓解免疫抑制微环境来增强固体瘤免疫疗法
Jiazhi Duan1,2, Songbo Zhao3,4,5, Yuyao Duan6
1State Key Laboratory of Crystal Materials, Shandong University, Jinan, Shandong, 250100, P. R. China.
Advanced healthcare materials
|January 31, 2024
概括
研究人员开发了智能二氧化纳米粒子 (MnOx) 来改善固体瘤的微环境. 这些MnOx纳米酶增强CAR-NK细胞透和抗瘤活性,提供了一种新的免疫疗法策略.
科学领域:
- 生物医学工程 生物医学工程
- 纳米技术纳米技术
- 免疫治疗是一种免疫疗法.
背景情况:
- 固体瘤具有具有挑战性的免疫抑制微环境,阻碍了采用细胞疗法.
- 瘤缺氧和有限的效应细胞透是癌症免疫治疗成功的关键障碍.
研究的目的:
- 开发一种智能纳米粒子系统,以克服免疫抑制瘤微环境 (TME).
- 为了提高化学抗原受体修饰自然杀手 (CAR-NK) 细胞治疗固体瘤的疗效.
主要方法:
- 具有过氧化酶活性的可生物降解的空心二氧化纳米粒子 (MnOx) 的制造.
- 用CD56抗体对MnOx纳米酶进行修改,以对CAR-NK细胞进行特定的结合.
- 在固体瘤模型中评估MnOx武装的CAR-NK细胞透,TME调节和抗瘤活性.
主要成果:
- MnOx纳米酶有效催化过氧化产生氧气,缓解瘤缺氧.
- CD56抗体结合的MnOx纳米酶特别向并增强了CAR-NK细胞透到瘤中.
- 结合疗法显示出卓越的抗瘤疗效,并改善了与实体瘤的小鼠的生存率.
结论:
- 氧纳米酶是重编程TME并促进CAR-NK细胞治疗的有希望的策略.
- 这种协同方法为在固体瘤中推进免疫细胞治疗提供了有价值的工具.
- 抗体链接使MnOx纳米酶的剂量更低,更有效.
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