通过基于水凝的现场疫苗接种激活强大和持续的STING通路,用于癌症免疫疗法
Sheng-Liang Cheng1,2, Hsin-Mei Lee1, Chung-Pin Li3,4,5,6
1Institute of Biomedical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan.
ACS nano
|October 15, 2024
概括
这项研究开发了一种可注射的水凝疫苗,使用STING激动剂来增强抗瘤免疫力. 这种新的方法增强了免疫细胞的激活,并在冷瘤模型中抑制了瘤的生长.
科学领域:
- 免疫学 免疫学 免疫学
- 生物材料科学 生物材料科学
- 在瘤学瘤学.
背景情况:
- 干扰素基因刺激 (STING) 途径对于抗瘤免疫至关重要,但由于药物动力学不佳和免疫抑制性瘤微环境 (TME),STING激动剂的临床使用受到限制.
- 现有的疗法在过渡激活和克服敌对的TME方面遇到了困难,因此需要新的传递系统来实现持续的治疗效果.
研究的目的:
- 开发一种可注射的基于丝纤维蛋白水凝的现场疫苗,用于持续和可控的STING激动剂,免疫细胞死亡 (ICD) 诱导剂和免疫调节剂的输送.
- 为了增强STING通路激活,树突细胞 (DC) 成熟和免疫细胞透到瘤中.
- 重塑免疫抑制性TME并改善癌症免疫治疗中的治疗结果.
主要方法:
- 制造一种可注射的丝纤维蛋白水凝,封装cGAMP纳米粒子 (cGAMPnps),一种ICD诱导剂和免疫调节剂 (抗PD-1 Ab或OX40L).
- 使用核心外cGAMPnps以有效地传递给DC,激活STING通路并促进DC成熟.
- 在临床前模型中评估STING激活,ICD和免疫调节剂对血管正常化,TME重塑和抗瘤免疫反应的协同效应.
主要成果:
- cGAMPnps有效地将cGAMP传递给DC,激活STING通路并增强DC成熟.
- 与ICD相关的损伤相关的分子模式放大和延长了STING激活,延迟了cGAMP和STING降解.
- 水凝疫苗,单独或与手术一起,显著增强了DC和CD8+T细胞激活,抑制了冷瘤模型中的瘤进展和复发,并使瘤血管正常化.
结论:
- 开发的基于水凝的现场疫苗通过提供受控释放和持续激活,有效地克服了传统STING激动剂的局限性.
- 这种方法对新辅助/辅助免疫疗法显著有前途,增强抗瘤免疫力和重塑TME.
- 该研究提出了用于癌症免疫治疗中的STING激动剂应用的革命性策略,有可能改善各种恶性瘤的结果.
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