两端休眠光敏感剂-抗生素细菌失活:单细胞水平的机制,剂量和细胞进化
Julia McCain1, Sol R Martínez1, Florencia Fungo1
1Department of Chemistry and Quebec Center for Advanced Materials (QCAM), McGill University, Montreal, QC H3A 0B8, Canada.
Journal of the American Chemical Society
|December 14, 2023
概括
一种新的双方向疗法将抗生素与通过活性氧物种 (ROS) 激活的休眠光敏剂 (DoPS) 结合起来. 这种方法迅速使抗生素耐药的细菌失活, 提供了对抗抗菌素耐药性的有希望的策略.
科学领域:
- 抗菌药物的发现
- 光动力疗法
- 细菌耐药性机制
背景情况:
- 抗生素耐药性对全球健康构成重大威胁,需要创新的治疗策略.
- 杀菌性抗生素诱导细菌中的活性氧物种 (ROS),从而成为协同疗法的潜在目标.
研究的目的:
- 使用杀菌抗生素和休眠光敏剂 (DoPSs) 开发一种新的细菌失活的双方向策略.
- 研究DoPS的ROS激活机制,以增强细菌杀死,并探索它们在抗生素耐药性方面的潜力.
主要方法:
- 设计和合成具有分子内火的新型休眠光敏剂 (DoPS).
- 通过ROS捕获激活DoPS,导致单片氧生成和光发射.
- 使用大量殖民地形成单元测定和*Escherichia coli*和*Pseudomonas aeruginosa*单细胞实时成像来评估协同效果.
主要成果:
- DoPSs证明了光激活的细菌失活与抗生素协同作用,特别是针对*大肠杆菌*和*伪菌*.
- 单细胞成像显示了自催化DoPS激活和放大系统,与细胞死亡率相关联.
- 该疗法显示基于细胞代谢物的选择性失活,表明毒性降低的潜力.
结论:
- 开发的双方向疗法提供了一种快速和选择性的细菌失活方法,利用ROS生成.
- 这种方法有可能减轻抗生素耐药性,并为细菌对光动力压力的反应提供机理性见解.
- 需要对DoPS细胞负荷和单片氧剂量进行进一步的研究,以获得最佳的治疗结果.
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