RIP1-RIP3复合体的酸化驱动组合调节了被编程的和病毒诱导的炎症
Young Sik Cho1, Sreerupa Challa, David Moquin
1Department of Pathology, University of Massachusetts Medical School, Worcester, MA 01655, USA.
Cell
|June 16, 2009
概括
激酶RIP3对于编程性亡,细胞死亡途径至关重要. RIP3激活了RIP1酸化,启动了病毒感染期间炎症反应至关重要的级联反应.
科学领域:
- 细胞生物学 细胞生物学
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
背景情况:
- 编程性亡是一种独立于酶的细胞死亡途径,分子机制尚不清楚.
- 激酶RIP1涉及到被编程的亡以及NF-kappaB激活,这表明需要特定的调节剂.
- 确切的分子参与者决定被编程死亡的特异性仍然难以捉摸.
研究的目的:
- 鉴定特定参与编程性亡的新型分子调节剂.
- 阐明RIP3在TNF和病毒诱导的编程瘤中的作用.
- 在细胞死亡和免疫反应的背景下了解RIP1-RIP3相互作用.
主要方法:
- 查RNA干扰 (RNAi) 以确定关键的调节者.
- 对RIP1和RIP3酸化动态的分析.
- 对反应性氧物种 (ROS) 生产的评估.
- 在病毒感染期间使用RIP3淘汰赛 (RIP3-/-) 鼠标的体内研究.
主要成果:
- 鉴定出激酶RIP3是TNF和病毒感染诱导的程序性亡的关键激活剂.
- RIP3调节了RIP1的酸化,稳定了RIP1-RIP3复合体,并激活了pronecrotic激酶的活性.
- 这种复杂的触发下游反应性氧物种的生产.
- RIP3-/-小鼠显示病毒诱导的亡,炎症和病毒控制受损.
结论:
- 通过调节 RIP1-RIP3 激酶级联,RIP3 作为编程性亡途径的关键启动者.
- 这种RIP3介导的途径对于对病毒感染产生有效的炎症反应至关重要.
- 准RIP3可能提供治疗策略来管理病毒病原性.
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