一种多组蛋白质EED在表观遗传学上调节了 lipopolysaccharide耐受性巨细胞中的反应
Atsadang Boonmee1,2,3, Salisa Benjaskulluecha2,4, Patipark Kueanjinda2,5
1Department of Microbiology, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand.
Epigenetics & chromatin
|November 29, 2024
概括
多镇压复合体2 (PRC2) 调节巨细胞中脂多糖 (LPS) 的耐受性. 作为PRC2的组成部分,EED在表观遗传上沉默基因,包括对LPS耐受性至关重要的TGF-β/Runx3轴.
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.
- 细胞生物学 细胞生物学
背景情况:
- 天生的免疫细胞对重复刺激产生低反应性 (耐受性),是一种天生的免疫记忆形式.
- 聚合体抑制复合体2 (PRC2) 通过H3K27me3调解转录抑制,但其在脂聚糖 (LPS) 诱导的巨细胞耐受性中的作用尚不清楚.
研究的目的:
- 研究PRC2成分EED在巨细胞中LPS诱导的耐受性中的作用.
- 阐明PRC2调节LPS耐受性的表观遗传机制.
主要方法:
- 产生了EED淘汰赛 (Eed KO) 巨细胞.
- 评估了基因组修饰 (H3K27me3,H3K27ac) 和细胞因子的产生 (TNF-α,IL-6).
- 进行RNA测序 (RNA-Seq) 并分析信号通路 (低氧,TGF-β,Wnt/β-catenin).
- 研究了Runx3和ETS转录因子的作用.
主要成果:
- 在LPS耐受性时,Eed KO巨体显示减少H3K27me3,增加H3K27ac,并抑制了促炎性细胞因子的产生.
- 耐受LPS的EedKO巨体表现出丰富的低氧,TGF-β和Wnt/β-catenin信号通路.
- EED直接调节涉及LPS耐受性的基因,包括Runx3,并确定了ETS转录因子结合部位.
结论:
- 通过EED,PRC2在表观遗传上沉默关键基因,例如TGF-β/Runx3轴中的基因,以调节巨细胞中的LPS耐受性.
- 这项研究提供了对先天免疫耐受性表观遗传控制的机制性见解.
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