Setdb2通过两种不同的表观遗传机制调节巨细胞的炎症触发诱导训练免疫力
bioRxiv : the preprint server for biology
|April 1, 2025
概括
天生的免疫细胞通过表观遗传变化开发训练免疫力. 一种表观遗传修饰剂Setdb2在这个过程中起着关键作用,根据触发因素不同地影响炎症和代谢途径.
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:
- 训练免疫包括在最初的炎症触发器后,先天免疫细胞的表观遗传修饰.
- 对表观遗传修饰剂Setdb2在训练免疫中的作用尚不清楚.
研究的目的:
- 研究Setdb2在巨细胞中微生物和无菌触发诱导的训练免疫中的作用.
- 阐明Setdb2调节训练免疫力的机制.
主要方法:
- 利用遗传小鼠模型和基因组分析.
- 研究了Setdb2在对β-葡萄糖和西方饮食/氧化LDL刺激的反应中的功能.
- 分析了表观遗传修饰,包括H3K9甲基化和染色质循环.
主要成果:
- 在训练免疫过程中,Setdb2对于重新编程促炎和代谢途径至关重要.
- Setdb2采用两个不同的机制:增强剂-促进剂循环 (独立于酶活性) 和H3K9甲基化 (抑制干扰素通路).
- 致病培训涉及这两种机制,而无菌培训主要利用染色体循环机制.
结论:
- Setdb2在训练免疫力中起着双重作用,对病原和无菌触发物有不同的机制.
- 这项研究揭示了下游途径的分叉,区分了病原性和无菌的炎症反应.
- 研究结果表明,潜在的治疗策略是针对细胞因子与干扰素的途径来管理慢性炎症.
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