使用光氧化损伤恢复抗生素耐药细菌的易感性
Jennifer M Soares1,2, Vladislav V Yakovlev2, Kate C Blanco1
1Institute of Physics of São Carlos, University of São Paulo, São Carlos 13566-590, Brazil.
概括
光动态无活化 (PDI) 可以通过使细菌更容易受到抗生素的影响来克服多药性耐药性. 这种方法减少了细菌的持久性,并对抗抗生素失败.
科学领域:
- 微生物学 微生物学
- 摄影化学的使用.
- 传染性疾病 传染性疾病
背景情况:
- 耐多药细菌对全球健康构成重大威胁.
- 具有新机制的新抗生素的有限开发加剧了耐药性危机.
- 光动力失活 (PDI) 提供了一种潜在的策略,可以增强现有的抗生素并克服耐药性.
研究的目的:
- 研究PDI在破坏细菌抗菌素耐药性的有效性.
- 评估PDI增加细菌对常规抗生素敏感性的能力.
- 评估PDI对细菌持久性和毒性的影响.
主要方法:
- 使用PDI与黄素作为光敏感剂 (10μM) 和暴露于光线 (10J/cm2).
- 测试了PDI对临床分离物和实验室诱导的多药耐药细菌的影响,包括金黄色葡萄球菌.
- 监测抗生素耐药性水平 (阿莫西西林,红素, gentamicin) 和在PDI后五个周期的后代微生物的持久性.
主要成果:
- PDI显示,黄金葡萄球菌对多种抗生素的耐药性有显著的破坏.
- 光动力学效应降低了细菌对抗生素的敏感性,其效应在细菌几代人中保持.
- PDI有效地改变了细菌的敏感性,降低了标准菌株和临床菌株的抗性和持久性.
结论:
- PDI代表了一种对抗抗菌素耐药性的创新方法.
- 由PDI诱导的光氧化作用可以恢复对抗生素的敏感性,解决抗生素失败的问题.
- PDI有望提高当前抗生素治疗对抗性病原体的有效性.
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