缺乏CD14的小鼠受到保护,免受脂多糖诱导的心脏炎症和左心室功能障碍
Pascal Knuefermann1, Shintaro Nemoto, Arunima Misra
1Department of Medicine, Baylor College of Medicine, Houston, Tex, USA.
Circulation
|November 13, 2002
概括
CD14对于败血症引起的心脏功能障碍至关重要. 在小鼠中阻断CD14可以预防心脏问题和由脂聚糖 (LPS) 引起的炎症,这突出了CD14作为败血症的治疗点.
科学领域:
- 心血管生物学 心血管生物学
- 免疫学 免疫学 免疫学
- 分子医学是分子医学.
背景情况:
- 败血症引起的心肌功能障碍的机制尚不清楚.
- CD14调解了包括心脏在内的器官中对脂聚糖 (LPS) 的炎症反应.
研究的目的:
- 在体内调查CD14在脂聚糖 (LPS) 诱导的心肌功能障碍中的作用.
主要方法:
- 野生类型和CD14缺乏的小鼠受到埃舍里奇亚大肠杆菌LPS的挑战.
- 评估心脏功能使用心声回声学.
- 测量了心肌炎症标志物 (TNF,IL-1β,NOS2) 和NF-kappaB激活.
主要成果:
- 在野生型小鼠中,LPS增加了心肌TNF和IL-1β,但在缺乏CD14的小鼠中没有.
- 在LPS后的野生类型小鼠中观察到NOS2诱导和NF-kappaB激活,但在CD14缺乏的小鼠中没有.
- 在野生型小鼠中,LPS损害了心脏功能,而缺乏CD14的小鼠保持了正常的心脏功能.
结论:
- CD14在调解心脏对LPS的炎症反应中发挥着关键作用.
- CD14对于LPS诱导的休克期间左心室功能障碍的发展至关重要.
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