设计的阴离子抗微生物与负细菌外膜的相互作用
Shelley He1,2, Charles M Deber3,4
1Program in Molecular Medicine, Research Institute, Hospital for Sick Children, Toronto, ON, M5G 0A4, Canada.
Scientific reports
|January 22, 2024
概括
将充电残留物聚合在阴离子抗微生物 (CAP) 中,可以增强它们与细菌外膜的结合. 这种改善的相互作用增强了抗微生物活性,特别是对抗多药耐药细菌.
科学领域:
- 微生物学和免疫学
- 生物化学和分子生物学
- 发现抗微生物药物 发现抗微生物药物
背景情况:
- 格拉姆阴性细菌具有外部膜 (OM),使其对抗生素产生耐药性.
- 阴离子抗微生物 (CAPs) 是一种破坏细菌膜的天然抗生素.
- 在OM上的脂多糖 (LPS) 是CAP的关键目标.
研究的目的:
- 调查CAP中充电残留物和疏水性的分布如何影响与细菌OM的相互作用.
- 探索修改CAP结构的潜力,以增强抗微生物活性对抗阴性细菌.
主要方法:
- 设计了一个基于自然CAP Ponericin W1.1的类库.
- 评估了对OM脂多糖的结合亲和力.
- 对抗多药耐药性Pseudomonas aeruginosa菌株进行评估的抗菌活性.
主要成果:
- 在的N端或C端连续放置氨酸残留物增强了对OM LPS的结合亲和力.
- 与间隔序列相比,氨酸集群序列对抗多药耐药P. aeruginosa具有优越的抗菌活性.
- 结构修改显著影响了-OM相互作用和疗效.
结论:
- 在CAP中素聚类是一种有前途的策略,可以增强与细菌OM的初始相互作用.
- 增强的OM相互作用可以增加的进入和活动在内膜 (IM).
- 这种方法显示了开发更有效的抗微生物药物的潜力,可以对抗多药性耐药性阴性细菌.
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