DOCK2通过调解内皮细胞炎症反应来促进动脉样硬化
Guoqing Qian1, Oluwaseun Adeyanju1, Dunpeng Cai2
1Department of Cellular and Molecular Biology, The University of Texas Health Science Center at Tyler, Tyler, Texas.
The American journal of pathology
|October 14, 2023
概括
细胞动力学特征者2 (DOCK2) 蛋白质通过增加血管内皮细胞的炎症来促进动脉样硬化. 降低细胞中DOCK2水平会减少炎症标志物,这表明心血管疾病的新治疗点.
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
- 细胞和分子医学 细胞和分子医学
背景情况:
- 动脉样硬化是心血管疾病死亡的主要原因,涉及血管内皮细胞的炎症变化.
- 细胞动力学 (DOCK) - 2蛋白在动脉样硬化的发病过程中的贡献者的作用仍然在很大程度上未被探索.
研究的目的:
- 研究DOCK2蛋白在动脉样硬化的发展和进展中的作用.
- 阐明DOCK2影响动脉样硬化中的血管炎症的分子机制.
主要方法:
- 使用低密度脂蛋白受体淘汰 (Ldlr-/-) 和Ldlr-/-Dock2-/-小鼠食高脂肪饮食以建模动脉样硬化.
- 在大动脉根和大动脉中使用Oil Red O染色评估动脉样损伤大小.
- 量化了炎症标志物 (ICAM-1,VCAM-1,MCP-1) 和分析了NF-κB信号通路在小鼠组织和人血管内皮细胞 (ECs) 的激活.
主要成果:
- 在高脂肪饮食后对照小鼠的动脉样硬化病变中,DOCK2表达被上调.
- 与对照组相比,Ldlr-/-Dock2-/-小鼠的动脉样硬化负担显著降低.
- 在小鼠模型和人类EC中,DOCK2缺乏减弱的炎症标志物 (ICAM-1,VCAM-1,MCP-1) 和NF-κB激活对TNF-α刺激的反应.
结论:
- DOCK2通过增强血管内皮细胞炎症,在促进动脉样硬化方面发挥着至关重要的作用.
- DOCK2调节了关键粘附分子和参与炎症过程的化学酶的表达.
- 准DOCK2可能是缓解动脉样硬化和心血管疾病的新疗法策略.
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