通过DNA甲基化介导的Rbpjk抑制可以防止由系统性炎症引起的骨折非结合
Ding Xiao1,2, Liang Fang1, Zhongting Liu3
1Department of Orthopaedic Surgery, School of Medicine, Washington University, St. Louis, Missouri, USA.
The Journal of clinical investigation
|December 5, 2023
概括
炎症通过影响原生细胞和Rbpjk表达来损害骨愈合. 用修改后的原始细胞准NF-κB/Dnmt3b/Rbpjk通路可以恢复骨折非结合的骨修复.
科学领域:
- 骨生物学 骨生物学
- 炎症研究的研究.
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 系统性炎症使骨的修复复杂化,导致骨折愈合的挑战.
- 先生的细胞是对炎症的关键反应者,但它们的分化往往受损,导致骨折非结合.
研究的目的:
- 阐明导致炎症导致骨修复障碍背后的分子机制.
- 在炎症条件下确定恢复骨再生的治疗点.
主要方法:
- 单细胞RNA测序以识别对炎症有反应的细胞系.
- 基因动物模型 (Ikk2ca,Dnmt3b操纵) 用于研究基因相互作用.
- 表观遗传分析 (甲基化) 和基因切除 (Rbpjk) 来验证机制.
- 对表观遗传修饰的原生细胞进行体内试验,以检测其治疗功效.
主要成果:
- 升高的炎症会在原生细胞中调节Rbpjk,阻碍分化并导致骨折非结合.
- 一个新的NF-κB/Dnmt3b/Rbpjk信号轴调解炎症对骨再生的不良影响.
- 缺少Dnmt3b会加剧骨折修复缺陷,而过度表达会减轻这些缺陷.
- 在炎症和Dnmt3b功能丧失模型中,Rbpjk切除可挽救骨折修复.
- 在炎症介导骨折非结合模型中,局部给予表观遗传修饰的原始细胞恢复了骨再生.
结论:
- NF-κB/Dnmt3b/Rbpjk轴是炎症性压力下骨再生的关键调节器.
- 针对这一轴,特别是通过先天细胞的表观遗传修饰,为骨折非结合提供了一个有希望的治疗策略.
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