通过联合STING和TLR4刺激,协同的先天免疫激活和抗瘤免疫
bioRxiv : the preprint server for biology
|April 22, 2024
概括
将STING激动剂与TLR激动剂 (如LPS) 结合起来,通过协同激活NF-κB和IRF3通路来增强抗瘤免疫力. 这种协同方法显示了瘤控制的改善,为癌症治疗提供了新的治疗潜力.
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:
- STING通路对于瘤的先天性免疫传感至关重要,促进IFN-β的产生,树突细胞激活和T细胞原始化.
- 刺痛激动剂作为癌症治疗药物表现有前途,但临床疗效有限,需要进一步研究先天免疫路径.
研究的目的:
- 调查将STING激动剂与托尔类受体 (TLR) 激动剂结合起来是否可以提高抗瘤免疫力.
- 阐明结合STING和TLR激活的协同效应背后的分子机制.
主要方法:
- 实验涉及单独使用STING主动体DMXAA和与TLR主动体,特别是LPS.AA结合治疗细胞.
- 进行了测试,以测量IFN-β转录,STING通路信号 (蛋白质聚合,IRF3酸化/转移) 和NF-κB通路激活 (p65酸化/转移).
- 在体内研究包括在B16黑色素瘤模型中注射LPS+DMXAA低于最佳剂量的内注射.
主要成果:
- 与DMXAA结合的LPS诱导的IFN-β转录明显大于单独的激动剂,表明协同作用.
- LPS增强了NF-κB通路激活 (p65酸化和核转移),这对于观察到的协同效应至关重要.
- 与单个激动剂相比,LPS + DMXAA低于最佳剂量的内注射导致体内B16黑色素瘤的控制显著改善.
结论:
- 通过TLR4和STING通路的组合信号传递通过NF-κB和IRF3.3的共同参与导致最佳的先天免疫信号传递.
- 结合TLR和STING通路的参与表明了增强抗瘤免疫力的治疗潜力.
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