工程cGAS-agonistic寡核酸作为癌症免疫疗法的治疗药物
Shurong Zhou1,2, Ting Su2, Furong Cheng2
1Department of Pharmaceutical Sciences, College of Pharmacy, Biointerfaces Institute, University of Michigan, Ann Arbor, MI 48109, USA.
Molecular therapy. Nucleic acids
|February 14, 2024
概括
我们开发了Svg3,一种新的cGAS激动剂,用于癌症免疫治疗. 这种寡核酸激活了cGAS-STING通路,增强了抗瘤免疫反应,并增强了免疫治疗的疗效.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 分子生物学分子生物学
背景情况:
- 干扰素基因 (cGAS-STING) 的循环GMP-AMP合成酶刺激通路对于通过I型干扰素 (IFN-I) 诱导的抗瘤免疫是至关重要的.
- 目前的STING激动剂面临的挑战包括不良配方,药理动力学和有限的临床疗效.
研究的目的:
- 引入Svg3,一种以自然为灵感的寡核酸,作为激活癌症免疫治疗中的cGAS-STING通路的cGAS激动剂.
- 为了评估Svg3与免疫检查点封锁相结合的疗效.
主要方法:
- Svg3被设计成一个针头形的寡核酸来绑定和激活cGAS.
- 研究了Svg3-cGAS类似液体的液滴的形成,以了解其作用机制.
- 在小鼠和人类细胞/组织中测试了Svg3的疗效,并在野生型和cGAS/STING缺乏的小鼠中测试了同源性瘤模型.
主要成果:
- Svg3有效地结合cGAS,促进相分离并形成类似液体的液滴,导致cGAS特有的免疫激活和强大的IFN-I反应.
- 在细胞和组织模型中,Svg3与现有的STING激动剂相比表现优越.
- 纳米粒子输送的Svg3降低了瘤免疫抑制,并在多个瘤模型中显著提高了免疫检查点阻塞的有效性.
结论:
- Svg3代表了对癌症组合免疫疗法的有前途的cGAS主动性寡核酸.
- 通过Svg3介导的cGAS-STING通路的激活为克服当前免疫疗法的局限性提供了一种新的策略.
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