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在小鼠中的托尔类受体4缺乏会影响静脉血栓的分辨率
Haixin Yuan1, Xiaoxi Huang1, Jie Ding1
1Medical Research Center, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China.
Frontiers in molecular biosciences
|May 30, 2023
概括
收费类受体4 (TLR4) 缺陷会影响小鼠深静脉血栓症的解决. 失去TLR4会减少炎症细胞的透和矩阵金属蛋白酶的活性,阻碍血栓溶解.
科学领域:
- 免疫学 免疫学 免疫学
- 血管生物学 血管生物学
- 炎症研究 炎症研究
背景情况:
- 收费类受体4 (TLR4) 在无菌炎症反应中起着关键作用.
- 深静脉血栓 (DVT) 的分辨率与无菌炎症具有共同的特征,表明TLR4的参与.
研究的目的:
- 调查TLR4在DVT分辨率中的作用.
- 阐明TLR4影响血栓溶解的机制.
主要方法:
- 通过下腔静脉 (IVC) 绑定建立了一个DVT小鼠模型.
- 在野生型和Tlr4-/-小鼠中评估了血栓重量,长度,原蛋白含量和炎症细胞透率.
- 炎症调解剂 (MCP-1,MMP-9,VEGF,IFNβ) 的量化表达和瘤中亲MMP-9活性.
- 研究了用脂多糖 (LPS) 刺激的腹巨细胞中的TLR4/NF-κB信号传递.
主要成果:
- Tlr4-/-小鼠表现出受损的DVT分辨率,具有更大的血栓和增加的原蛋白含量.
- 在Tlr4-/-小鼠中观察到中性粒细胞和巨细胞透的减少,MCP-1和MMP-9表达的降低,以及pro-MMP-9活性的降低.
- 在TLr4-/-小鼠的DVT血栓中,VEGF,IFNβ和MCP-5蛋白水平下降.
- 由LPS诱导的TLR4/NF-κB通路的激活,包括p65核转位和MMP-9/MCP-1转录,在TLr4-/-巨细胞中不存在.
结论:
- TLR4与静脉血栓症的解决有关.
- TLR4缺乏障碍了DVT的解决,可能是通过通过NF-κB通路的受损的炎症细胞招募和矩阵重塑.
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