具有智能pH响应电荷切换能力的抗和抗微生物涂层可以防止导管相关的阻塞和感染
Wenjie Wang1, Ying Ma2, Ningyue Deng2
1College of Polymer Science and Engineering, State Key Laboratory of Advanced Polymer Materials, Sichuan University, Chengdu, 610065, China.
Bioactive materials
|February 20, 2026
概括
一种用于腹腔透析 (PD) 导管的新型zwiterionic涂层提供了双重的抗污染和抗菌作用. 这种智能涂层可以预防感染和阻塞,改善功能衰竭患者的治疗结果.
科学领域:
- 生物材料科学 生物材料科学
- 表面化学 表面化学
- 医疗设备工程 医疗设备工程
背景情况:
- 与导管相关的感染和阻塞是腹腔透析 (PD) 的重大挑战,导致治疗失败.
- 现有的医疗导管表面很难有效地平衡抗微生物和抗污染特性.
研究的目的:
- 开发一种用于PD导管的新型涂层,该涂层通过响应pH的电荷交换机制集成了抗微生物和抗污染功能.
- 解决改善导管性能和减少置换治疗中的并发症的关键需求.
主要方法:
- 开发了一种带有轻微正电荷的聚合物zwitterionic主导涂层 (PZ-SPC),其异电点 (IEP) 为7.69.
- 通过调整有机四级盐来调整涂层的性能,以实现对pH值有反应的行为.
- 在体外测试中评估了蛋白质/细菌粘附和杀菌率,而在体内研究中使用了老鼠腹膜炎模型.
主要成果:
- 通过形成水化层,PZ-SPC涂层有效地抵抗了蛋白质和细菌粘附,减少了白蛋白和纤维素素粘附率高达76.58%和70.57%.
- 在酸性条件下 (模拟感染),该涂层表现出增强的正电荷,达到99.9%以上的杀菌率对抗格兰氏阴性和格兰氏阳性细菌.
- 在体内结果显示,PZ-SPC涂层的PD导管在老鼠中减少了导管阻塞和减轻了腹膜炎的严重程度.
结论:
- 通过智能pH响应电荷切换,PZ-SPC涂层提供了双重"防御" (抗污染) 和"杀伤" (抗菌) 模式.
- 这一策略在防和接触灭菌之间提供了最佳的平衡,为先进的医疗器械表面工程提供了实用指南.
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