聚合体多分子 (I:C) 通过诱导免疫细胞死亡和全身免疫激活来自我放大抗瘤免疫力
Jingyi Wang1, Beibei Guo1, Zhiwei Sun1
1Biomedical Polymers Laboratory, College of Chemistry, Chemical Engineering and Materials Science, and State Key Laboratory of Radiation Medicine and Protection, Soochow University, Suzhou, 215006, P. R. China.
Advanced healthcare materials
|June 19, 2024
概括
装有Poly (I:C) (PIC) 的向聚合体通过提高稳定性和细胞吸收来增强肺癌免疫疗法. 这种方法可以促进免疫细胞的激活和瘤细胞的死亡,从而导致显著的瘤抑制和生存益处.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 材料科学 材料科学 材料科学
背景情况:
- 免疫疗法是肺癌的关键治疗方法,但反应率有限.
- 聚I:C (PIC) 刺激先天性和适应性免疫力,可以诱导瘤中的免疫细胞死亡 (ICD).
- 由于体内稳定性和细胞吸收性差,PIC的临床实用性受到限制.
研究的目的:
- 开发PIC的有针对性的输送系统,以提高其抗瘤功效.
- 评估cRGD功能化聚合体包装PIC (t-PPIC) 的体外和体内性能.
主要方法:
- PIC被封装在cRGD功能化的聚合体体 (t-PPIC) 中.
- 在体外研究中评估了树突细胞 (DC) 激活和肺瘤细胞亡.
- 在体内研究中使用了小鼠LLC肺瘤模型来评估瘤生长抑制,存活率和免疫细胞反应.
- 研究了与免疫检查点抑制剂或放射治疗的组合疗法.
主要成果:
- 与自由PIC相比,t-PPIC表现出增强的稳定性和细胞吸收.
- 在体外,t-PPIC激活了DCs,并在肺瘤细胞中诱导了亡.
- 在体内,t-PPIC抑制了瘤生长,改善了生存率 (40%无瘤),并增强了亡,ICD,DC刺激,NK细胞招募和CD8+T细胞激活.
- 与t-PPIC的联合治疗导致60%的小鼠的瘤完全回归.
结论:
- 集成向的聚合体PIC (t-PPIC) 是一种有前途的策略,可以增强肺癌免疫疗法.
- t-PPIC同时诱导ICD和全身免疫激活,克服了PIC的局限性.
- 这种方法显著放大了抗瘤免疫反应,为改善临床结果提供了潜力.
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