在现场释放的细菌膜囊泡激活了STING通路,通过增强免疫治疗的细胞内DNA池
Wenjie Wang1,2, Anjun Song1,2, Fang Pu1,2
1Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences Changchun Jilin 130022 P. R. China jren@ciac.ac.cn xqu@ciac.ac.cn.
Chemical science
|December 26, 2025
概括
这项研究开发了一种新型的纳米平台,可以增强干扰素基因 (STING) 途径的循环氨酸单酸-氨酸单酸合成酶 (cGAS) 刺激器. 这种方法通过增加细胞内DNA来增强癌症免疫治疗的免疫反应.
科学领域:
- 生物医学工程 生物医学工程
- 免疫学 免疫学 免疫学
- 材料科学 材料科学 材料科学
背景情况:
- 该cGAS-STING通路对于免疫疗法中的免疫反应至关重要,由DNA激活.
- 目前使用DNA的方法受到活性氧物种和DNA长度的限制,限制了免疫激活.
- 缺乏足够的DNA积累阻碍了有效的免疫反应.
研究的目的:
- 开发一种对近红外光 (NIR) 敏感的纳米平台,以增强细胞内DNA池.
- 激活瘤STING通路,以改善免疫疗法.
- 克服现有的基于DNA的免疫疗法的局限性.
主要方法:
- 将细菌外膜囊泡 (OMVs) 和高合金 (HEAs) 整合到一个键有机框架 (HOF) 中.
- 尼尔射线光会触发HEA介导的HOF分解,从而在内释放OMVs.
- 来自OMV的外源性dsDNA和HEA释放的内源性dsDNA的组合增加了瘤DNA库.
主要成果:
- 该纳米平台成功增强了瘤内的细胞内DNA池.
- 由NIR触发的OMV和HEA释放有效地激活了STING信号通路.
- 在HOF内封装OMV减轻了非特异性STING激活和LPS诱导的炎症.
结论:
- 开发的纳米平台通过增加瘤DNA池,有效地刺激了STING途径.
- 这一战略为设计纳米药物以增强免疫治疗提供了一种新的方法.
- 该平台展示了克服基于DNA的免疫激活当前局限性的潜力.
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