MyD88信号控制器可以诱导自身免疫性心肌炎
René R Marty1, Stephan Dirnhofer, Nora Mauermann
1Division of Experimental Critical Care Medicine, Department of Research, University Hospital, Basel, Switzerland.
Circulation
|January 13, 2006
概括
树突细胞中的MyD88信号传递对于启动自身免疫性心肌炎至关重要. 阻断抗原呈现细胞中的这种途径可以防止心脏特异性自身免疫和心肌病变.
科学领域:
- 免疫学 免疫学 免疫学
- 心血管研究研究心血管研究
- 这是一种自身免疫力.
背景情况:
- 实验性自身免疫性心肌炎 (EAM) 是后病毒性心肌病的CD4+T细胞模型.
- 骨髓分化的初级反应88 (MyD88) 对于托尔类受体和IL-1受体信号传递至关重要.
- MyD88在心肌炎发病过程中的特定功能尚不清楚.
研究的目的:
- 研究MyD88在实验性自身免疫性心肌炎的发展中的作用.
- 为了确定MyD88信号的细胞源,对疾病诱导至关重要.
主要方法:
- 使用了MyD88缺乏 (MyD88(-/-)) 和野生类型 (MyD88(+/+)) 的小鼠.
- 用alpha-myosin重链 (MyHC-alpha) 免疫小鼠诱导EAM.
- 评估了CD4+T细胞扩张,树突细胞 (DC) 功能和细胞因子的产生.
主要成果:
- MyD88(-/-) 小鼠受到EAM的保护,表现为心脏特异性CD4+T细胞扩张减少.
- MyD88(-/-) 树突细胞表现出由于缺陷瘤亡因子-α释放导致的T细胞原始化能力受损.
- 在DC中恢复MyD88信号传递完全恢复了MyD88小鼠中的T细胞扩张和心肌炎.
结论:
- 周边区的抗原呈现细胞内MyD88信号传递对于自身免疫性心肌炎的发展至关重要.
- 准这些细胞中的MyD88信号提供了预防心脏特异性自身免疫和心肌病的潜在策略.
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