全球STING模仿剂通过优选激活瘤控制信号通路来提高抗瘤免疫力
Ying Wang1, Sirui Li2,3, Mengying Hu4
1Division of Chemical Biology and Medicinal Chemistry, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
一种通过脂质纳米颗粒传递的全新通用STING模仿剂 (uniSTING) 通过激活抗瘤免疫力有效治疗各种癌症,即使在缺乏STING表达的瘤中也是如此. 这种方法克服了当前STING治疗的局限性.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 生物技术是生物技术.
背景情况:
- 刺痛 (干扰素基因刺激剂) 激动剂显示出治疗前景,但面临着诸如发育不良和瘤刺痛表达低等挑战.
- 瘤进展涉及复杂的信号通路,包括NF-κB,可以抵消抗瘤免疫反应.
研究的目的:
- 开发一种通用STING模仿剂 (uniSTING),可以克服当前STING激动剂的局限性.
- 评估uniSTING在激活STING信号和控制各种癌症模型中的瘤生长方面的有效性.
主要方法:
- 一个聚合物架构被用来创建uniSTING.
- uniSTING-mRNA通过脂质纳米颗粒 (LNP) 通过内或全身注射输送.
- 在既定和转移性瘤模型中评估了抗瘤疗效,包括三阴性乳腺癌,肺癌,黑色素瘤和肝脏恶性瘤.
主要成果:
- 在不同的细胞类型中,UniSTING 独立于内源性 STING 水平,激活了 STING 信号.
- UniSTING选择性地刺激了控制瘤的IRF3/IFN-I通路,而不是促进瘤的NF-κB通路.
- 通过LNP介导的uniSTING-mRNA显示出强大的抗瘤疗效,优于现有的STING激动剂,并延长存活时间,特别是在与α-Wnt2b抗体相结合时.
结论:
- 通过LNP递送的uniSTING-mRNA代表了克服STING治疗障碍的有希望的策略,为各种癌症提供了潜在的治疗方法,包括那些下调或缺少STING的癌症.
- 通过促进IRF3/IFN-I活动,UniSTING促进树突细胞成熟和抗原特异性CD8+T细胞反应.
- 与uniSTING和Wnt2b抑制的联合治疗协同增强了抗瘤效应.
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