增强的抗微生物查灵敏度使得识别一个超短KR-8的工程LL-37mini的识别,以对抗耐药病原体
Abraham Fikru Mechesso1, Yajuan Su2, Jingwei Xie2
1Department of Pathology and Microbiology, College of Medicine, University of Nebraska Medical Center, 985900 Nebraska Medical Center, Omaha, Nebraska 68198-5900, United States.
ACS infectious diseases
|October 9, 2023
概括
研究人员发现了一种新的查方法,并开发了LL-37mini,这是一种有效的强效抗菌剂,可以对抗MRSA等抗生素耐药细菌有效. 这种新型化合物还可以防止生物膜的形成,并且没有显示哺乳动物细胞毒性,提供了一个有前途的治疗候选者.
科学领域:
- 微生物学 微生物学
- 药物发现 药物发现 药物发现
- 生物化学 生化学
背景情况:
- 抗生素耐药性对全球健康构成重大威胁,需要发现新型抗菌剂.
- 标准的抗微生物查介质,如穆勒 - 欣顿,可能会掩盖某些抗微生物候选物的活性,包括人体甲基西丁LL-37,对抗抗甲基西林耐药黄金葡萄球菌 (MRSA) 等病原体.
研究的目的:
- 确定一个优化的查介质,增强检测抗微生物活性.
- 发现和开发基于人类cathelicidin LL-37的新型抗菌,以提高功效和降低毒性.
- 评估开发的对关键细菌病原体的疗效及其治疗应用的潜力.
主要方法:
- 在新发现的敏感介质中对抗微生物的查.
- 基于LL-37模板的体设计和合成.
- 针对MRSA,大肠杆菌和Pseudomonas aeruginosa的体外抗菌分析.
- 哺乳动物细胞细胞毒性测定.
- 在体外和体内生物膜抑制和破坏测试.
- 抗生素耐药性发展研究.
主要成果:
- 鉴定出一种敏感的查介质,揭示了LL-37对包括MRSA在内的各种病原体的强烈活性.
- 鉴定了KR-8,导致设计LL-37mini,一个更短,更强大的模拟.
- LL-37mini对MRSA,大肠杆菌和P. aeruginosa表现出广泛的活性,没有显著的哺乳动物细胞毒性.
- 在体外和体内,LL-37mini有效地抑制了细菌的附着,生物膜的形成,并破坏了预制的生物膜.
- 经过多次通道后,MRSA没有对LL-37mini产生耐药性,这表明一种膜向机制.
结论:
- 优化的查条件提高了抗微生物化合物的识别.
- LL-37mini是一种强效,无毒的抗微生物和抗菌膜剂,具有治疗耐药细菌引起的感染的潜力.
- LL-37mini的低成本合成和缺乏耐药性发展使其成为开发新治疗剂的有希望的候选者.
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