无活化TREX1释放癌细胞的STING-干扰素信号,并促进抗瘤免疫力
Tetsuo Tani1, Haritha Mathsyaraja2, Marco Campisi1
1Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts.
Cancer discovery
|January 16, 2024
概括
在癌细胞中禁用TREX1酶释放STING-IFN信号,增强抗瘤免疫力. 这种方法通过增强免疫性来使瘤对免疫检查点封锁和细胞疗法敏感.
科学领域:
- 免疫学 免疫学 免疫学
- 癌症生物学 癌症生物学
- 分子瘤学分子瘤学
背景情况:
- 癌症通常通过抑制干扰素基因刺激器 (STING) -干扰素 (IFN) 信号来逃避免疫检测.
- 治疗策略,如STING激动剂和表观遗传修饰剂可以在临床前癌症模型中恢复抗瘤免疫力.
研究的目的:
- 研究三个主要外核酶1 (TREX1) 在调节癌细胞内的STING-IFN信号传递中的作用.
- 探索向TREX1以增强癌细胞免疫性和治疗反应的潜力.
主要方法:
- 评估了TREX1表达及其与癌细胞中STING-IFN信号传递的相关性.
- 在临床前小鼠瘤模型中利用TREX1无活化.
- 评估了TREX1向对免疫细胞招募,NK细胞活性和对免疫检查点阻塞 (ICB) 的反应的影响.
主要成果:
- 适应性诱导TREX1通过降解细胞质DNA来抑制STING依赖的核酸传感.
- 在TREX1表达上升调节自克林IFN和STAT1,防止STING-IFN信号放大.
- 癌细胞中的TREX1无活化会激活STING-IFN信号,招募T和NK细胞,并增强对IFNγ和ICB的敏感性.
结论:
- 准TREX1可以放大癌细胞STING-IFN信号,增加瘤免疫性.
- 无活化TREX1代表了一种补充策略,使瘤对ICB和细胞疗法敏感.
- 调节TREX1为克服癌症中的免疫逃避提供了一个新的治疗途径.
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