基于Ag (I) 复合物的感染微环境响应复合物,用于针对性抗菌治疗
Jing Han1, Yue Hou1, Zhong Yu2
1Department of Materials Physics and Chemistry, Xi'an University of Technology, Xi'an, Shaanxi, 710048, China.
新的复合材料在需要时释放银离子 (Ag+),用于抗菌治疗,以应对诸如酸度和酶等感染条件. 这种智能设计可以防止白银过早释放,减少副作用并增强感染控制.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 生物医学工程 生物医学工程
背景情况:
- 银离子 (Ag+) 具有广泛的抗菌活性,但遭受不受控制的释放.
- 现有的抗微生物策略往往需要额外的载体,导致感染微环境中的潜在副作用.
研究的目的:
- 开发适应感染微环境的复合材料,以便按需释放Ag+并提高抗菌效率.
- 创建一个智能药物输送系统,最大限度地减少与持续Ag+暴露相关的副作用.
主要方法:
- 设计为具有高Ag+含量的银复合物 (1),涂有氨酸 (HA) 或Fe (III) -酸 (Fe (III) -TA).
- 研究了由氨基酶 (HAase) 和酸度 (pH 5.5) 触发的对刺激有反应的涂层分解.
- 通过单晶X射线衍射来表征银复合体,并通过最小抑制度 (MIC) 和抑制区评估抗菌活性.
主要成果:
- 在非感染条件下,复合材料1@HA和1@Fe(III) -TA显示显著抑制了Ag+释放 (14.99%和3.31%).
- 在模拟感染的微环境中,Ag+释放增加到59.26% (1@HA) 和23.92% (1@Fe(III) -TA).
- 1@Fe(III) -TA在抗击P. aeruginosa和抗卡巴胺抗性大肠杆菌方面表现出增强的酸触发性性能.
结论:
- 开发了对刺激有反应的复合材料,用于控制的Ag+输送,解决了始终在线的白银释放的局限性.
- 智能设计有效地利用特定于感染的线索进行按需的抗菌作用,减少降解副作用.
- 该战略为细菌感染的向抗菌治疗提供了一个有希望的方法.
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