一种双功能的抗血栓凝涂层,集成免疫调节和表面被动化,用于在炎症条件下的血管植入物
Yage Hu1, Yao Xiong1, Tiantian Zheng1
1National Engineering Research Center for Biomaterials, College of Biomedical Engineering, Sichuan University, Chengdu, 610064, China.
Acta biomaterialia
|February 15, 2026
概括
这项研究开发了一种用于心血管设备的新型水凝涂层,该涂层通过结合表面被动化和免疫调节来减少血栓形成. 涂层有效地防止高风险患者的凝血和炎症.
科学领域:
- 生物材料科学 生物材料科学
- 免疫学 免疫学 免疫学
- 心血管工程 心血管工程
背景情况:
- 心血管植入式器件经常导致血栓形成,特别是在系统性炎症患者中.
- 传统的抗血栓涂层受限于它们无法解决炎症和凝血之间的相互作用.
研究的目的:
- 开发一种具有表面被动化和免疫调节功能的协同作用的抗血栓性水凝涂层.
- 评估涂层在预防血栓形成和调节炎症条件下免疫反应方面的有效性.
主要方法:
- 在聚氨 (PU) 基板上使用2-甲基烯酸 (MPC) 和4-氨基-2,2,6,6-四甲 (tetramethylpiperidin-1-oxyl) (Tempol) 制造一个采用2甲基烯酸 (MPC) 和4-氨基-2,2,6,6-四甲 (tetramethylpiperidin-1-oxyl) 的zwitterionic涂层.
- 在体外评估蛋白质吸附,血小板粘附,自由基清除和细胞相容性.
- 使用中央静脉导管在子模型中对脂聚糖 (LPS) 诱导的全身炎症进行体内评估.
主要成果:
- 该涂层在体外显著降低了蛋白质吸附和血小板粘附.
- 该涂层表现出极好的自由基清除能力和良好的细胞相容性.
- 在体内,涂层显著减少了血栓形成和导管周围的炎症细胞透.
- 涂层促进了巨细胞的两极分化,从有利于炎症的M1表型转变为抗炎M2表型.
结论:
- 协同的水凝涂层有效调节物质-生物界面和局部免疫微环境.
- 这种双重功能策略在炎症条件下维持抗血栓性质.
- 开发的涂层为高风险患者设计抗血栓血液接触装置提供了一个有前途的方向.
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