基于I型光敏感剂的金属超分子纳米纤维用于协同抗菌疗法
Shibo Lyu1,2, Lukun Li1, Jingdong Gao3
1Institute of Frontier Chemistry School of Chemistry and Chemical Engineering Shandong University Qingdao China.
Smart molecules : open access
|July 8, 2025
概括
这项研究引入了用于光动力学疗法 (PDT) 的新型金属-超分子纳米纤维,可以克服治疗细菌感染的氧气限制. 这些纳米纤维产生了I型和II型反应性氧物种 (ROS),以提高抗菌功效.
科学领域:
- 生物材料科学 生物材料科学
- 纳米技术 纳米技术
- 光动力学疗法 光动力学疗法
- 抗菌研究 抗菌研究
背景情况:
- 光动力疗法 (PDT) 提供了一种有前途的方法来对抗微生物感染,因为其诱导细菌耐药性的风险很低.
- 传统的II型PDT疗法的有效性受到感染组织中经常存在的低氧微环境的显著阻碍,这限制了依赖氧的活性氧物种 (ROS) 生成.
- 开发氧气独立或氧气通用PDT策略对于在具有挑战性的感染环境中增强治疗结果至关重要.
研究的目的:
- 设计金属-超分子纳米纤维,能够解决传统PDT在缺氧细菌感染环境中的局限性.
- 在控制释放纳米纤维系统中研究I型光敏感剂与银离子 (Ag+) 结合的协同抗菌效应.
- 在体外和体内评估开发的纳米纤维的生物相容性和治疗性能.
主要方法:
- 通过协调I型光敏感剂 (BTZn-Py) 与银离子 (Ag+) 来制造金属超分子纳米纤维.
- 在光照射下生成ROS (I型和II型) 的特征.
- 评估酸和光触发的Ag+释放动力学,并评估体外和体内抗菌活性对格拉姆阳性和格拉姆阴性细菌的评估.
主要成果:
- 制造的纳米纤维在光照射后成功产生了I型 (O2•−) 和II型 (1O2) ROS,有效地克服了缺氧条件.
- 从纳米纤维中实现了对Ag+的控制释放,证明了与正常组织的良好生物相容性.
- 在体外和体内实验中证实了显著的协同抗菌性能,对广泛的细菌进行了实验.
结论:
- 集成I型光敏感剂和Ag+的金属-超分子纳米纤维提供了一种双作用抗菌策略,即使在低氧环境中也有效.
- 控制释放的Ag+和光诱导的ROS生成有助于增强协同抗菌疗效和提高安全性.
- 这种创新的纳米纤维系统在光动力疗法中为治疗具有挑战性的细菌感染提供了有希望的进步.
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