聚合诱导排放光敏感剂与Ag ((I) -π相互作用增强的活性氧物种,用于消除多药耐药细菌
Senlin Peng1, Jiayi Song2, Shouting Wu1
1School of Biology and Engineering (School of Health Medicine Modern Industry), Guizhou Medical University, Guiyang 550025, China.
ACS applied materials & interfaces
|June 7, 2024
概括
研究人员开发了一种新的光敏感剂TTII和TTIIS,用于对抗多药耐药细菌. 这种创新方法通过产生反应性氧物种和释放银离子来增强光动力疗法,有效治疗感染并促进伤口愈合.
科学领域:
- 材料科学 材料科学 材料科学
- 生物医学工程 生物医学工程
- 摄影化学的使用.
背景情况:
- 多药耐药 (MDR) 细菌是全球健康的一个重大挑战,因为有效的治疗选择有限.
- 光动力抗菌疗法 (PAT) 显示出对抗具有低抗性诱导的MDR细菌的前景.
- 现有的光敏化剂往往缺乏双重的I/II型反应性氧物种 (ROS) 生产和多式联动作用能力.
研究的目的:
- 开发一种新型的近红外发射光敏感剂,具有聚合诱导发射 (AIE) 特性,以提高抗菌功效.
- 研究开发的光敏剂的双重ROS生成机制 (I型和II型).
- 评估光敏剂与银离子释放为多模式细菌感染治疗的协同抗菌作用.
主要方法:
- 一种三胺 indole iodoethane (TTII) 光敏剂及其银(I) 自组装 (TTIIS) AIE衍生物的合成.
- 在辐射下产生ROS (I型:OH,II型:1O2) 的TTII和TTIIS的表征.
- 对MDR *Escherichia coli* (MDR *E. coli*) 和耐甲林* (MRSA) 的TTIIS抗菌活性的评估.
- 评估TTII和TTIIS在治疗MRSA感染的全厚小鼠伤口中的疗效.
主要成果:
- TTII有效地产生了I型 (•OH) 和II型 (1O2) ROS.
- 在TTIIS中的Ag(I) -π相互作用增强了1O2生成.
- TTIIS表现出光动力学-Ag(I) 双模式灭菌能力,增加了对MDR *E. coli*的1-2倍的抗菌活性.
- TTII和TTIIS都在低度 (0.55μg mL-1) 的感染小鼠伤口中显示出超过98%的MRSA细菌杀死,促进伤口愈合.
结论:
- 开发的TTII和TTIIS光敏剂通过联合光动力学和银离子疗法为对抗MDR细菌感染提供了一个有希望的策略.
- TTIIS的AIE特性和双ROS生成有助于其增强的抗菌功效.
- 这些发现凸显了TTII和TTIIS作为有效的细菌感染治疗和伤口愈合的生物相容剂的潜力.
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