破坏PRC1组成部分RING1A和RING1B通过缓解BMP4抑制促进血管生成
Jingyuan Zhang1, Xing Peng1, Jinling Qin1
1State Key Laboratory of Respiratory Disease, the First Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong 510120, China; Department of Basic Science Research, Guangzhou National Laboratory, Guangzhou, Guangdong 510005, China.
Journal of advanced research
|July 20, 2025
概括
聚合体抑制复合体1 (PRC1) 组件RING1A和RING1B通过沉默BMP4.4来抑制血管生成. 抑制这种抑制可以通过促进血管形成来治疗缺血性疾病.
科学领域:
- 分子生物学分子生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 血管生物学 血管生物学
背景情况:
- 血管新生对于组织修复和恒温至关重要.
- 表观遗传机制,特别是Polycomb抑制综合体1 (PRC1) 介导的H2AK119ub,调节血管性基因表达.
- 在血管生成中PRC1核心成分RING1A和RING1B的特定作用尚不清楚.
研究的目的:
- 研究RING1A和RING1B在内皮细胞和血管生成中的功能作用.
- 阐明RING1A和RING1B调节血管生成过程的分子机制.
- 在血管生成的背景下确定RING1A和RING1B的下游目标.
主要方法:
- 在体外和体内使用siRNA用于RING1A和RING1B的功能丧失研究.
- 评估内皮功能,包括管形成,ac-LDL吸收,氧化生产,增殖和迁移.
- 整合RNA测序和CUT&Tag分析,以识别直接的转录标和表观遗传修饰.
主要成果:
- 抑制RING1A和RING1B增强了内皮管的形成,ac-LDL的吸收和氧化的产生.
- 减少RING1A,但不包括RING1B,减少了内皮细胞的增殖和迁移.
- 无论是RING1A还是RING1B的枯竭都显著促进了体内血管新生,BMP4被确定为PRC1.1抑制的直接标.
结论:
- RING1A和RING1B作为血管生成的表观遗传抑制剂,通过通过H2AK119ub沉默BMP4表达来起作用.
- 针对PRC1-介导的抑制提供了一个潜在的治疗策略,用于增强缺血性疾病中的血管生成.
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