通过结合SIRPalpha或calreticulin/CD91,肺集合素作为双重功能监测分子来抑制或增强炎症
Shyra J Gardai1, Yi-Qun Xiao, Matthew Dickinson
1Program in Cell Biology, Department of Pediatrics, National Jewish Medical and Research Center, 1400 Jackson Street, Denver, CO 80206, USA.
Cell
|October 9, 2003
概括
肺表面活性蛋白A和D (SP-A和SP-D) 在炎症中具有双重作用. 它们的结合方向决定了它们是否抑制或增强炎症反应,维持肺部平衡.
科学领域:
- 肺免疫学 肺免疫学
- 分子生物学分子生物学
- 宿主-病原体相互作用
背景情况:
- 表面活性蛋白A和D (SP-A和SP-D) 是肺集合素,对天生的免疫至关重要.
- 这些蛋白质具有不同的域:用于PAMP结合的球状头部和用于发酵细胞启动的原体尾部.
- 它们在调节肺炎中的精确作用需要进一步阐明.
研究的目的:
- 研究SP-A和SP-D在调节炎性介质产生的双重作用.
- 阐明SP-A和SP-D结合方向影响炎症信号通路的机制.
主要方法:
- 研究了SP-A和SP-D与SIRPalpha和calreticulin/CD91的相互作用.
- 分析了这些相互作用对促炎媒介产生的影响.
- 利用模型系统来探索不同约束方向的功能后果.
主要成果:
- 通过球状头与SIRPalpha结合的SP-A和SP-D抑制了促炎媒介的产生.
- 通过质尾部与calreticulin/CD91结合的SP-A和SP-D刺激了促炎媒介的产生.
- SP-A和SP-D的结合方向决定了它们对肺炎的净影响.
结论:
- SP-A和SP-D在肺炎中起着复杂的,取决于背景的作用.
- 这些蛋白质通过SIRPalpha抑制炎症,有助于维持肺部平衡.
- 在某些条件下,SP-A和SP-D可以促进对病原体清除和组织修复至关重要的炎症反应.
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