对NIR/pH敏感的氨酸-ε-聚氨酸/黑纳米复合材料用于细菌感染的协同治疗
Qian Gao1, Ranran Fu1, Mengting Li2
1Laboratory of Digital Medical Engineering, Sanya Research Institute of Hainan University, School of Biomedical Engineering, Hainan University, Sanya, 572025, China.
Materials today. Bio
|September 15, 2025
概括
这项研究介绍了一种新的纳米平台 (BP@EPL-LA),可以对抗耐药细菌. 它使用光激活疗法和适应性充电来治疗感染,为抗生素提供了一个有希望的替代品.
科学领域:
- 生物材料科学 生物材料科学
- 纳米技术纳米技术
- 抗菌疗法是一种抗菌疗法.
背景情况:
- 抗生素耐药性的增加需要新的治疗策略.
- 由耐药细菌引起的皮下需要有效的非侵入性疗法.
研究的目的:
- 开发一种多式近红外光敏感纳米平台 (BP@EPL-LA),用于治疗皮下.
- 为增强细菌向和生物膜透而设计表面充电适应性.
主要方法:
- 装载黑纳米片与L-Arg移植的e-多聚 (L-氨酸) 来创建BP@EPL-LA.
- 研究纳米平台在酸性环境中的电荷切换及其与细菌膜的相互作用.
- 通过激光照射 (660 nm) 评估通过ROS和氧化 (NO) 生产的抗菌疗效.
- 评估一种对甲素耐药黄金葡萄球菌 (MRSA) 的小鼠模型中的治疗结果.
主要成果:
- 在生理条件下,BP@EPL-LA在酸性传染性环境中表现出中性表面电荷和正电荷,增强生物膜透.
- 该纳米平台通过ROS,NO和e-poly-L-lysine (EPL) 证明了协同抗菌活性,有效分散生物膜.
- 在MRSA中,BP@EPL-LA取得了显著的治疗成功,促进细菌根除,减少炎症,并通过血管化和原沉积增强组织愈合.
结论:
- 通过克服抗生素耐药性,BP@EPL-LA为皮下治疗提供了一个有希望的策略.
- 无增强抗菌光动力疗法 (aPDT) 和EPL的杀菌作用的综合方法提供了一个新的治疗途径.
- 这种纳米平台展示了针对耐药性感染的先进抗微生物策略的潜力.
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