诺尔-皮奥切林类似物及其阴离体复合物的抗菌效应对抗多药耐药性病原体
N G Hasitha Raviranga1, Mubarak Ayinla1, Harini A Perera1
1Department of Chemistry, University of Massachusetts Lowell, One University Avenue, Lowell, Massachusetts 01854, United States.
ACS infectious diseases
|October 29, 2024
概括
新的和复合物通过向铁代谢,对抗耐药Pseudomonas aeruginosa具有强大的抗菌活性. 这些化合物为传统抗生素提供了有希望的替代品,具有低哺乳动物细胞毒性.
科学领域:
- 微生物学 微生物学
- 药用化学 医学化学
- 生物化学 生化学
背景情况:
- Pseudomonas aeruginosa 是一种机会性病原体,表现出越来越多的抗生素耐药性.
- 金属体,如皮奥切林,是P. aeruginosa的关键毒性因素和调节者.
- 铁结合形式的皮奥切林 (ferripyochelin) 通过PchR转录调节器调节皮奥切林代谢.
研究的目的:
- 设计和合成用于与PchR紧密结合的nor-pyochelin类似物.
- 为了研究 (GaIII) 和 (InIII) 复合物的抗菌潜力,使用这些类似物.
- 评估这些复杂物对抗多药耐药P. aeruginosa.的疗效.
主要方法:
- 在基对接研究中预测PchR中的ferripyochelin结合位点.
- 合成精选的诺皮欧凯林类似物.
- 用GaIII和InIII复合物的制备和抗菌检测.
- 对哺乳动物细胞的细胞毒性评估.
- 使用转体子突变体的机制研究.
主要成果:
- 在铁有限的条件下,GaIII复合物有效地抑制了P. aeruginosa.
- 在富含铁的环境中,InIII复合物显示出更高的疗效.
- 几种GaIII复合物实现了≤1μg/mL的最小抑制度 (MIC) 对抗多药耐药的分离物.
- 两个InIII系统表现出强烈的活性,MIC为8μg/mL.
- 化合物对哺乳动物细胞的细胞毒性较低.
结论:
- 与GaIII和InIII复合的Nor-pyochelin类似物代表了一个有前途的新类抗微生物药物.
- 这些金属复合物有效地对抗多药耐药P. aeruginosa.
- InIII复合物的机制可能包括通过与细菌铁素结合来诱导缺铁.
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