通过PRMT5/WDR77复杂形状的PD-1的转录后调节T细胞效应器功能和抗瘤免疫力
Yinmin Gu1,2, Yongbo Pan2, Chang Pan3
1The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.
The Journal of clinical investigation
|February 2, 2026
概括
蛋白质氨酸甲基转移酶5 (PRMT5) 和WDR77调节编程细胞死亡蛋白1 (PD-1) 的mRNA衰变. 这一发现揭示了增强抗PD-1免疫疗法在瘤中的疗效的新治疗策略.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 癌症研究 癌症研究
背景情况:
- 编程细胞死亡蛋白1 (PD-1) 基因调节对T细胞功能和瘤免疫逃避至关重要.
- 控制PD-1水平的转录后机制在很大程度上仍未被描述.
研究的目的:
- 为了阐明PDCD1 (PD-1基因) 的转录后调节.
- 确定PD-1的新型调节剂及其在T细胞介导的抗瘤免疫中的作用.
主要方法:
- RNA免疫沉,然后进行质谱测量以确定RNA结合蛋白.
- 定量PCR和西式斑点测试用于评估基因和蛋白质表达.
- 条件淘汰赛小鼠模型用于研究体内功能.
- 对临床瘤透T细胞的分析.
主要成果:
- PRMT5被确定为一种RNA结合蛋白,通过与WDR77和Argonaute2.2的相互作用促进PDCD1mRNA衰变.
- 一类IFN/STAT1通路调节PRMT5和WDR77,增强它们与PDCD1 3' UTR的结合.
- 在T细胞中丧失PRMT5或WDR77会损害效应器功能,并增加对抗PD-1疗法的敏感性.
- 临床数据显示,瘤透T细胞中PRMT5/WDR77和PDCD1表达之间的反相关性,预测免疫疗法耐药性.
结论:
- 通过与WDR77的RNA结合活性,PRMT5在转录后调节PDCD1mRNA稳定性和T细胞效应器功能.
- 通过STAT1调节PRMT5/WDR77是PD-1调节的一个关键机制.
- 针对STAT1的fludarabine与抗PD-1疗法联合治疗显示出协同作用的抗瘤效应.
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