实验室内耐药性发展为分子耐药性机制的洞察力提供了对 cefiderocol 的洞察力
Richard Kriz1,2, Kathrin Spettel2,3, Alina Pichler1,2,4
1Division of Infectious Diseases and Tropical Medicine, Department of Medicine I, Medical University of Vienna, Vienna, Austria.
The Journal of antibiotics
|July 30, 2024
概括
这项研究揭示了细菌中新型的 cefiderocol 耐药机制. 通过铁运输体减少药物进入的突变是常见的,以及排泄和酶的新型突变.
科学领域:
- 微生物学 微生物学
- 分子生物学分子生物学
- 抗微生物耐药性 抗微生物耐药性
背景情况:
- 塞菲德罗科尔对抗多药耐药的格拉姆阴性细菌显示出有前途.
- 有限的数据存在于临床环境中对 cefiderocol 耐药性机制.
研究的目的:
- 在实验室中调查 cefiderocol 耐药性的发展.
- 确定基底的分子机制 cefiderocol耐药性.
主要方法:
- 使用高通量体外耐药性发展模型.
- 暴露的细菌菌株 (大肠杆菌,肺炎,P. aeruginosa,A. baumannii) 增加了 cefiderocol 的度.
- 进行了汁微稀释敏感性测试和全基因组测序.
主要成果:
- 开发出抗塞菲德罗科尔的细菌克隆,其MIC高8-512倍.
- 在26个基因中发现了42个新突变.
- 在envZ,tonB和cirA基因的频繁突变减少了 cefiderocol的流入.
- 其他机制包括排泄,抗生素失活酶和向突变.
结论:
- 通过铁运输体减少塞菲德罗科尔的流入是主要的抵抗机制.
- 新的分子机制有助于对 cefiderocol 的耐药性.
- 了解这些机制对于对抗耐药性感染至关重要.
相关概念视频
00:57Antibiotic Selection
52.7K
Overview
52.7K
01:31Defense Against Bacterial Pathogens
1.4K
The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
1.4K