准NHEJ通过MYC降解激活STING信号,以提高SCLC中的抗瘤免疫力
Subhamoy Chakraborty1, Andrew Elliott2, Utsav Sen3
1Division of Medical Oncology, Department of Internal Medicine, The Ohio State University, Columbus, Ohio, USA.
Nature communications
|February 10, 2026
概括
小细胞肺癌 (SCLC) 显示高PRKDC (DNAPKcs) 表达,阻碍免疫治疗. 抑制DNAPKcs激活了免疫反应,提高了SCLC免疫疗法的疗效.
科学领域:
- 在瘤学瘤学.
- 癌症免疫学 癌症免疫学
- 修复DNA修复DNA的修复
背景情况:
- 小细胞肺癌 (SCLC) 具有高度致命性,尽管突变负担很高.
- 目前的免疫疗法对SCLC患者提供了适度的益处,突出了未满足的临床需求.
- 在24种瘤类型中,SCLC表现出DNA修复蛋白PRKDC (DNAPKcs) 的最高表达.
研究的目的:
- 研究PRKDC (DNAPKcs) 在SCLC免疫疗法耐药性中的作用.
- 探索DNAPKcs抑制作为SCLC治疗策略的潜力.
主要方法:
- 在超过179,000名真实世界患者瘤中分析PRKDC表达.
- 在SCLC细胞系和小鼠模型中DNAPKcs的耗尽.
- 研究下游信号通路,包括cGAS/STING和MYC降解.
主要成果:
- 高PRKDC表达与SCLC中免疫治疗反应不佳相关.
- DNAPKcs的枯竭通过增加细胞质双链DNA来激活cGAS/STING通路.
- 抑制DNAPKcs导致MYC通过GSK3β通路进行蛋白质体降解,从而增强免疫性.
- DNAPKcs的耗尽使SCLC模型对免疫疗法的敏感.
结论:
- PRKDC (DNAPKcs) 的上调有助于SCLC的免疫疗法耐药性.
- 抑制DNAPKcs是一种增强抗瘤免疫力的有希望的策略.
- 向DNAPKcs可以增强SCLC的免疫疗法疗效.
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