聚乙胺/聚乳酸的抗菌涂层 - - 接种氨酸多层表面 - - 具有菌体的功能
Luise Wirth1,2, Birgit Urban1, Eva Bittrich1
1Leibniz-Institut für Polymerforschung Dresden e.V., 01069 Dresden, Germany.
ACS omega
|December 23, 2024
概括
使用多电解质多层 (PEM) 和菌体 (PHAG) 的抗菌涂层有效防止植入物相关的感染. PHAG对细菌表现出显著的根除作用,证明了它们在这些新型涂料中的主导抗菌作用.
科学领域:
- 生物材料科学 生物材料科学
- 传染病研究 传染病研究
- 纳米技术纳米技术
背景情况:
- 植入物相关感染 (IAI) 是一个重要的临床挑战,因为植入物表面的细菌生物膜形成.
- 目前的策略往往难以有效地预防或根除这些持久感染.
- 新型抗菌涂层对于提高植入物安全性和患者治疗结果至关重要.
研究的目的:
- 开发和评估具有菌体 (PHAG) 功能的新型聚电解质多层 (PEM) 涂层,以预防植入物相关感染.
- 调查PEM表面电荷对菌体结合和抗菌疗效的影响.
- 为了证明PEM涂层系统内的菌体的抗菌贡献.
主要方法:
- 聚乙醇多层 (PEM) 构造使用层次组装与聚乙烯胺 (PEI) 和氨酸-聚乳酸 (DAC) 移植聚合物 (DAC).
- 用原子力显微镜 (AFM) 和减弱的总反射率-里埃变换红外 (ATR-FTIR) 光谱分析了与不同层次数 (PEM-5和PEM-6) 的PEM涂层结合的菌体 (PHAG).
- 通过将PEM和PHAG功能化的PEM涂层沉积在甲板上并用细菌培养物挑战它们来评估抗菌功效.
主要成果:
- 与PEM-6相比,具有阴离子表面电荷的PEM-5表现出明显更高的细菌 (PHAG) 结合.
- 原子力显微镜和ATR-FTIR光谱学证实了PHAG在PEM表面上的成功固定,可能是通过静电相互作用.
- 包括PEM和PHAG在内的涂料表现出对细菌具有强大的根除作用,而仅含PEM的涂料没有抗菌活性.
结论:
- 多电解质多层 (PEM) 可以有效地与菌体 (PHAG) 功能化,以创建先进的抗菌涂层.
- PEM涂层的表面电荷在优化菌体 (PHAG) 吸附和随后的抗菌性能方面发挥着至关重要的作用.
- 菌体 (PHAG) 是这些复合涂料中观察到的抗菌功效的主要驱动因素,为抗植入物相关感染提供了有前途的策略.
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