作为增强抗瘤免疫力的自发性STING激动剂的化学诱导周期性二核酸
Yang Hai1, Zhen Xun1, Linlin Yang1
1State Key Laboratory of Chemo/Bio-Sensing and Chemometrics, College of Chemistry and Chemical Engineering, Affiliated Hospital of Hunan University, School of Biomedical Sciences, Hunan University, Changsha 410082, China.
Journal of the American Chemical Society
|July 23, 2025
概括
化学诱导的循环二核酸 (iCDN) 增强了用于癌症免疫治疗的STING激活. 这种新的方法改善了细胞吸收和按需的STING通路控制,提高了抗瘤免疫力,并减少了副作用.
科学领域:
- 免疫学
- 生物化学
- 药物开发
背景情况:
- 干扰基因刺激剂 (STING) 是癌症免疫治疗的关键点.
- 目前循环二核酸 (CDN) 激动剂面临的挑战包括稳定性差,细胞透率低,以及缺乏时空控制,导致异位炎症.
研究的目的:
- 开发新的可化学诱导的循环二核酸 (iCDN) 以提高细胞吸收和按需激活STING通路.
- 实现对STING激活的时间空间和细胞特异控制,以改善癌症免疫疗法.
主要方法:
- 在CDN的基位上安装生物对角化学组,以创建iCDN.
- 使用Staudinger还原和反向电子需求Diels-Alder (IEDDA) 反应进行生物对应的STING激活.
- 扩展iCDN对光和内源酶的反应,以进行精确的控制.
主要成果:
- iCDN证明了有效的自我传递到细胞中,并使生物对应性STING激活.
- 在免疫性较差的瘤模型中,通过iCDN条件激活STING增强了抗瘤免疫力.
- 当针对ICDN并与免疫检查点阻塞 (ICB) 结合时,减少了全身细胞因子的释放,提高了抗瘤功效.
结论:
- iCDN为有效的CDN交付和STING激活的时空控制提供了一个有希望的策略.
- 这种方法在开发下一代癌症免疫疗法方面具有重大潜力.
- 在临床前癌症模型中,生物直角iCDN可提高治疗效果并降低系统性毒性.
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