通过 SETDB1 的表观遗传沉默抑制了瘤内在的免疫性
Gabriel K Griffin1,2,3, Jingyi Wu1,2, Arvin Iracheta-Vellve1
1Broad Institute of MIT and Harvard, Cambridge, MA, USA.
Nature
|May 6, 2021
概括
该研究确定SETDB1是抑制抗瘤免疫力的关键表观遗传调节剂. 通过激活免疫反应,SETDB1的丧失增强了癌细胞对免疫治疗的敏感性.
科学领域:
- 癌症研究
- 表观遗传学
- 免疫学
背景情况:
- 表观遗传失调是癌症的一个标志,
- 识别控制癌细胞免疫敏感性的因素对于开发有效的免疫疗法至关重要.
研究的目的:
- 确定调节癌细胞免疫敏感性的表观遗传调节剂.
- 调查SETDB1在免疫逃逸和抵抗免疫检查点封锁中的作用.
主要方法:
- 在接受免疫检查点阻塞治疗的小鼠瘤模型中进行了体内CRISPR- Cas9查.
- 针对936个染色体调节剂,以确定影响免疫敏感性的因素.
- 分析了人类瘤中的SETDB1放大及其与免疫排除的关联.
主要成果:
- 确定了SETDB1 (H3K9甲基转移酶) 和相关复合体 (HUSH,KAP1) 作为免疫逃逸的媒介.
- 人类瘤中的SETDB1放大与免疫排除和免疫检查点阻塞的抵抗有关.
- SETDB1的丧失抑制了可转移的元素和免疫刺激基因,从而触发了T细胞的反应.
结论:
- SETDB1 作为一种表观遗传检查点,抑制瘤内在免疫性.
- SETDB1是提高癌症免疫治疗结果的潜在治疗标.
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