通过炎症诱导的染色体形状调节免疫信号整合和记忆
Bence Daniel1,2,3,4,5, Andy Y Chen1,6,3,4, Katalin Sandor1,3,4
1Department of Pathology, Stanford University, Stanford, CA, USA.
bioRxiv : the preprint server for biology
|March 18, 2024
概括
介质蛋白-4 (IL-4) 重编程巨细胞的3D基因组构造,增强炎症基因表达,并使转录记忆成为可能. 这些3D基因组变化对免疫细胞反应和记忆至关重要.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 基因组学就是基因组学.
背景情况:
- 三维 (3D) 基因组构造调节基因表达,但其在免疫细胞快速反应和记忆中的作用尚不清楚.
- 了解免疫细胞如何整合信号并记住基因组层面的刺激是关键的.
研究的目的:
- 研究3D基因组构成在调节巨细胞炎症反应和转录记忆中的作用.
- 阐明分子机制,通过这种机制,介质蛋白-4 (IL-4) 启动巨细胞以增强免疫反应.
主要方法:
- 在初级巨细胞中对转录基因组,表观基因组和基对分辨率微捕获C数据的综合分析.
- 基于CRISPR的扰动来研究增强剂-促进剂接触和CCCCTC结合因子 (CTCF) 边界元素的功能.
- 用IL-4,内毒素,干扰素-和德克萨米他进行刺激.
主要成果:
- IL-4稳定地重新连接3D基因组构造,使与免疫反应相关的增强剂靠近它们的向促进体.
- 由IL-4诱导的形状变化对于增强内毒素诱导的基因表达和转录记忆至关重要.
- 转录记忆可以通过3D基因组变化持续存在,即使没有改变染色质可访问性或基因组修改.
结论:
- 3D基因组在编码对免疫刺激的快速和记忆转录反应方面发挥着根本性的作用.
- 基因组结构的稳定变化是巨细胞免疫记忆的关键机制.
- IL-4通过建立3D基因组构造来启动巨细胞,从而促进强大且持续的炎症基因表达.
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