非正规的PRC1.1许可转录反应以使Treg在免疫适应中的可塑性
Ting Li1, Yingying Zhao1, Qian Li1
1State Key Laboratory of Experimental Hematology, National Clinical Research Center for Cancer, The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics, Key Laboratory of Immune Microenvironment and Disease (Ministry of Education), Tianjin Medical University Cancer Institute and Hospital, Department of Cell Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China.
Molecular cell
|June 17, 2025
概括
多胞体抑制复合体1.1 (PRC1.1) 通过沉积H2AK119ub1标记来调节活性调节T (aTreg) 细胞功能. 在癌症中抑制PRC1.1可以增强抗瘤免疫力,并与免疫疗法产生协同作用.
科学领域:
- 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.
- 分子生物学分子生物学
背景情况:
- 多胞体抑制复合体 (PRCs) 已知可以对转录性沉默和维持细胞身份.
- 在调控性T (Treg) 细胞功能可塑性和免疫适应中PRCs的作用尚未完全理解.
研究的目的:
- 为了研究KDM2B的作用,非正规PRC1.1的一个组成部分,在调节Treg细胞功能和可塑性.
- 阐明PRC1.1影响Treg细胞激活和免疫抑制功能的机制.
- 评估在癌症免疫治疗中准PRC1.1的治疗潜力.
主要方法:
- 使用Kdm2b的消去模型和用IBP的药理抑制.
- 评估了H2AK119单双化 (H2AK119ub1) 在活跃促进体中的水平.
- 分析了Treg细胞的激活,比例和免疫抑制功能.
- 在具有Treg特异性Kdm2b删除和抗PD-L1治疗的黑色素瘤携带小鼠中评估了抗瘤免疫力.
主要成果:
- KDM2B被确定为活性Treg (aTreg) 细胞免疫抑制功能和比例的关键调节者.
- PRC1.1将H2AK119ub1沉积在活跃的促进体上,使aTreg程序的转录激活成为可能.
- 当Kdm2b在Tregs中被删除时,PRC1.1的破坏会减少H2AK119ub1,损害Treg激活,并增强抗瘤免疫力.
- 在黑色素瘤小鼠模型中,特异于Treg的Kdm2b删除与抗PD-L1疗法产生协同作用.
结论:
- H2AK119ub1作为双重功能表观遗传标记,促进而不是抑制活跃促进者的转录.
- PRC1.1的功能是分子静电,微调Treg适应性和免疫抑制.
- PRC1.1是一种潜在的治疗点,通过调节癌症Treg细胞功能来增强抗瘤免疫力.
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