离子干扰放大器纳米系统通过线粒体功能障碍和细胞酶抑制来增强放射治疗
Shuting Zheng1,2, Yinfei Zheng1,2, Honglei Hu1,3
1Department of Medical Imaging Center, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China.
Journal of nanobiotechnology
|November 26, 2025
概括
这项研究开发了一种新的纳米系统,通过改善瘤细胞死亡和克服免疫抑制来提高放射治疗 (RT) 的疗效. 结合疗法实现了显著的瘤生长抑制和增强抗瘤免疫力.
科学领域:
- 生物医学工程 生物医学工程
- 纳米技术 纳米技术
- 癌症免疫疗法癌症免疫疗法
背景情况:
- 放射治疗 (RT) 的有效性受到瘤放射电阻和免疫抑制性瘤微环境 (TME) 的限制.
- 细胞亡细胞清除 (细胞分裂) 和TME酸性阻碍了抗瘤免疫力.
- 一个理想的放射敏感剂必须增强辐射诱导的细胞死亡,并解决免疫障碍.
研究的目的:
- 开发一种用于协同作用的放射免疫治疗的多功能纳米系统.
- 为了增强瘤微环境中的辐射敏感性和克服免疫抑制.
- 调查纳米系统在基于MRI的跟踪和临床翻译方面的潜力.
主要方法:
- 构建了一种混合性半孔有机纳米系统,包含/,奥梅普拉 (一种质子抑制剂) 和一种细胞抑制剂.
- 用氨酸对纳米系统进行表面修改,以进行主动准.
- 在4T1细胞中评估了体外辐射敏感化机制,并在4T1瘤携带小鼠中评估了体内疗效.
主要成果:
- 该纳米系统表现出高的T1放松性,用于潜在的MRI跟踪.
- 强化辐射诱导的氧化应激和线粒体功能障碍,导致~96%的瘤生长抑制.
- 增强了免疫细胞死亡,激活了cGAS-STING通路,增加了成熟的树突细胞 (>3倍),并增强了瘤透细胞毒性T淋巴细胞 (>4倍).
结论:
- 介绍了一种新的"离子干扰放大器"战略,用于协同放射性免疫治疗.
- 纳米系统同时增强了辐射敏感性和免疫反应.
- 基于MRI的综合追踪突出了临床翻译的潜力.
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