基替代的 siderophore colistin 显示出比其未经修改的多类对应物更高的抗菌活性
Sara Bescós-Ramo1,2, Enrique Gámez3,4, María Del Mar Encabo-Berzosa5
1Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, Zaragoza, 50009, Spain.
BMC chemistry
|June 9, 2025
概括
研究人员通过添加甲基醇组来修改抗生素胆固醇,显著提高其对大肠杆菌 (大肠杆菌) 的有效性. 这种新的方法显示了降低毒性和打击抗生素耐药性的潜力.
科学领域:
- 药用化学 医学化学
- 抗菌药物开发 抗菌药物开发
- 分子生物学分子生物学
背景情况:
- 胆固醇是一种最后的抗生素,面临着耐药性和毒性挑战.
- 塞菲德罗科尔是一种,由于其由甲基醇替代的 siderophore 结构,显示出强大的抗菌活性.
研究的目的:
- 通过结合甲基醇部分来增强素的抗菌疗效和安全性.
- 研究catechol修饰对对抗致病细菌,特别是大肠杆菌的素活性的影响.
主要方法:
- 通过化和化,醇部分与素的共价合.
- 对抗尿病原性大肠杆菌的临床菌株的最小抑制度 (MIC) 和最小杀菌度 (MBC) 的评估.
- 细胞毒性评估使用人类纤维细胞,角质细胞和人类器官的3D模型.
主要成果:
- 化策略的catechol合并减少了MIC对浮游生物大肠杆菌50%和MBC25%.
- 修改后的胆固醇在杀菌剂量下对人类皮肤细胞 (纤维细胞和角质细胞) 没有表现出细胞毒性.
- 在测试剂量的人类器官中没有观察到细胞毒性,解决了素的潜在毒性.
结论:
- 胆固醇用甲基组的化学修饰增强了其抗微生物功效,并降低了所需剂量.
- 这种用甲基醇替代的胆固醇表现出改善的安全性,在相关的人类细胞模型中没有观察到细胞毒性.
- 将甲基醇组纳入现有抗生素的战略为开发下一代抗微生物药物提供了一个有希望的途径,其耐药性发展潜力降低.
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