介素受体激活MYD88-ARNO-ARF6级联,以破坏血管稳定性
Weiquan Zhu1, Nyall R London, Christopher C Gibson
1Department of Medicine, University of Utah, Salt Lake City, Utah 84112, USA.
Nature
|November 13, 2012
概括
介质素-1β通过一种独立于NF-κB的新型MYD88-ARNO-ARF6通路破坏内皮屏障功能. 用SecinH3抑制这种途径可以改善血管稳定性和炎症疾病的结果.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 血管生物学 血管生物学
背景情况:
- 天生的免疫系统使用细胞因子,如介素-1β (IL-1β) 来对抗感染.
- 内皮细胞介导炎症,但可以被IL-1β破坏,损害屏障功能.
- 由IL-1β诱导的内皮屏障溶解的机制及其与NF-κB通路的联系尚不清楚.
研究的目的:
- 阐明IL-1β破坏内皮细胞与细胞相互作用和屏障功能的机制.
- 为了确定参与IL-1β介导内皮细胞失稳的信号通路.
- 评估在炎症性疾病中准这种途径的治疗潜力.
主要方法:
- 利用人体体内皮质内皮细胞模型来研究IL-1β的影响.
- 研究的信号通路涉及ADP-ribosylation factor 6 (ARF6) 和其激活剂ARF核酸结合部位开放剂 (ARNO).
- 研究了ARNO和骨髓分化因子88 (MYD88) 之间的相互作用.
- 在体外和动物炎症模型中测试了ARNO抑制剂SecinH3的疗效.
主要成果:
- IL-1β对内皮稳定的破坏性影响与NF-κB通路无关.
- IL-1β信号传递通过ARF6-ARNO通路发生.
- ARNO直接与MYD88结合,建立了一个新的MYD88-ARNO-ARF6信号轴.
- SecinH3治疗增强了血管稳定性,并在炎症性关节炎和急性炎症模型中改善了结果.
结论:
- 一种新型IL-1β信号通路 (MYD88-ARNO-ARF6),与正规NF-κB通路不同,可以调解内皮屏障的破坏.
- 通过像SecinH3这样的抑制剂向ARNO-ARF6通路,通过稳定血管屏障,为炎症性疾病提供了一个有前途的治疗策略.
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