在表观遗传上准PRMT5通过诱导内源逆转录病毒的表达和触发病毒模仿反应来促进抗瘤免疫力
Hua Zhang1, Gang Shi2, Yamei Li3
1Department of Biotherapy, Cancer Center and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, 610041, China; Department of Pathology, General Hospital of Western Theater Command, Chengdu, 610083, China; Pancreatic Injury and Repair Key Laboratory of Sichuan Province, General Hospital of Western Theater Command, Chengdu, 610083, China.
概括
在结肠直肠癌 (CRC) 中抑制PRMT5会触发病毒模仿反应,增强免疫检查点阻塞 (ICB) 疗法. 这种表观遗传方法通过重新激活先天免疫信号通路来提高抗瘤免疫力.
科学领域:
- 在瘤学瘤学.
- 免疫学 免疫学 免疫学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 大肠直肠癌 (CRC) 是全球领先的癌症,对免疫检查点阻塞 (ICB) 的反应有限.
- 表观遗传疗法显示出通过诱导病毒模拟来克服ICB抵抗的希望.
- 在CRC的免疫微环境和病毒模仿中PRMT5的作用尚不清楚.
研究的目的:
- 研究PRMT5在结直肠癌中的内在功能.
- 为了确定PRMT5抑制是否可以通过表观遗传调制来提高ICB的疗效.
- 阐明PRMT5影响先天免疫和瘤微环境的机制.
主要方法:
- 在CRC模型中抑制PRMT5.
- 对内源逆转录病毒 (ERV) 和dsRNA形成的分析.
- 对DNA修复,基因组不稳定性和先天免疫传感器表达的评估 (RIG-I/MDA5/STING).
- 评估表观遗传变化 (H3R2me2s,H3R8me2s) 和免疫细胞透.
主要成果:
- 抑制PRMT5减少了CRC的生长,并提高了ICB的治疗疗效.
- PRMT5敲击增加了ERV,dsRNA,DNA修复缺陷和基因组不稳定性.
- 抑制通过RIG-I/MDA5/STING激活先天免疫信号,诱导病毒模仿反应.
- PRMT5的向减少了特定的组分素甲基化标记,促进了先天性免疫反应和免疫细胞透.
结论:
- 在CRC中,PRMT5在抑制先天性免疫反应和病毒模仿中发挥着关键作用.
- 对PRMT5的表观遗传向可以诱导病毒模仿,增强抗瘤免疫力,并改善结直肠癌中的ICB有效性.
- 抑制PRMT5是一种潜在的治疗策略,可以克服CRC的免疫抵抗.
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