葡萄糖皮质体和IL4驱动的巨细胞编程之间的表观基因组和功能融合机制
Dinesh K Deochand1, Marija Dacic1,2, Michael J Bale3,4
1Hospital for Special Surgery Research Institute, The David Rosenzweig Genomics Center, New York, NY, USA.
bioRxiv : the preprint server for biology
|February 26, 2024
概括
葡萄糖皮质类药物和介质素-4通过调节基因表达和染色蛋白来诱导类似的巨细胞状态. 辅因子GRIP1集成这些信号,影响巨细胞功能和组织修复.
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:
- 巨细胞根据环境信号表现出不同的表型.
- 互白素-4 (IL-4) 诱导了一种组织修复的M2 (M2IL4) 现型.
- 葡萄糖皮质体 (GCs) 也会诱导类似的M2表型 (M2GC),但融合机制尚不清楚.
研究的目的:
- 研究M2IL4和M2GC巨细胞表型的功能融合背后的分子机制.
- 为了确定关键的转录调节器和信号通路,涉及到恒常性巨细胞编程.
主要方法:
- 综合功能基因组学,包括转录基因和染色体景观分析.
- 对转录效应因子的全基因组占用性研究.
- 在体外测定细胞活性.
- 使用小鼠结肠炎模型进行体内研究.
主要成果:
- M2IL4和M2GC的转录组显示了显著的重叠,反映了共享的染色体格局变化.
- 转录效应器KLF4和GC受体,与辅因子GRIP1一起,调解了这个核心的恒常计划.
- GRIP1集成刺激特异信号,对许多共享的转录基因变化至关重要.
- GRIP1 缺陷会损害巨细胞化 in vitro 和组织修复功能 in vivo.
结论:
- 一个核心的平稳性程序控制着M2IL4和M2GC巨细胞表型,由KLF4,GC受体和GRIP1介导.
- GRIP1作为不同信号的关键集成者,影响巨细胞的功能.
- 这些发现为了解巨细胞的可塑性提供了机制框架,并为抗炎药物开发提供了信息.
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