具有强烈抗菌活性的线性和多价,对敏感和多药耐药的E. coli临床分离物具有强烈的抗菌活性
Kelin Cuero-Amu1, Laura Daniela Bonilla-Velásquez1, Yerly Vargas-Casanova2
1Instituto de Biotecnología, Facultad de Ciencias, Universidad Nacional de Colombia, Carrera 45 No 26-85, 11321, Bogotá, Colombia.
Chemistry & biodiversity
|November 1, 2024
概括
来自牛乳的合成体显示出强烈的抗菌活性,对敏感和耐药的大肠杆菌菌株有很强的抗菌活性. 这些新型具有治疗多药耐药细菌引起的感染的潜力.
科学领域:
- 微生物学 微生物学
- 生物化学 生物化学
- 药用化学 医学化学
背景情况:
- 大肠杆菌的抗生素耐药性对全球健康构成重大威胁.
- 牛乳酸 (LfcinB) 衍生物因其抗菌性质而受到研究.
- 开发新的抗菌剂对于对抗耐药性细菌感染至关重要.
研究的目的:
- 合成和评估由LfcinB衍生的新型的抗菌疗效,以对抗大肠杆菌.
- 评估这些对敏感,耐药和多药耐药临床隔离物的活性.
- 研究这些的潜力,作为治疗大肠杆菌感染的治疗剂.
主要方法:
- 基于LfcinB序列 (RRWQWR和RRWQWRMKKLG) 的合成.
- 与E. coli的参考和临床分离物进行抗菌活性测试.
- 确定最小抑制度 (MIC) 和评估杀菌和溶血效应.
- 对抗生素的协同作用和诱导细菌耐药性的评估.
主要成果:
- 四分支多重抗原 (MAP) 和特定的LfcinB衍生对所有测试的大肠杆菌菌株表现出显著的抗菌活性.
- 体表现出强烈的活性,MIC值低,血液溶解效应最小,治疗指数有利.
- 当某些类与西普罗夫洛克萨或塞夫特里亚克松结合时,观察到协同作用的抗菌作用.
- 与西普罗夫洛克萨不同,一些合成的在长时间暴露后不会在大肠杆菌中诱导耐药性.
结论:
- 合成的LfcinB衍生对一系列大肠杆菌菌株有效,包括耐多药菌株.
- 这些可以作为治疗耐药大肠杆菌引起的感染的新疗法候选人.
- 一些的缺乏耐药性诱导表明,对于未来的临床应用来说,耐药性概况有利.
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