抗生素改变了细菌的种群增长率,异质性和形态
Morten Kals1,2, Emma Kals1, Jurij Kotar1
1Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom.
PLoS pathogens
|February 5, 2025
概括
抗生素耐药性需要了解系统水平的细菌反应. 我们发现,随着抗生素度的增加,人口增长率异质性增加,与药物标相关,并为新的快速抗生素敏感性测试方法提供信息.
科学领域:
- 微生物学 微生物学
- 细菌生理学 细菌生理学
- 抗生素耐药性 抗生素耐药性
背景情况:
- 抗生素耐药性是全球主要的健康威胁.
- 了解抗生素如何在系统层面影响细菌细胞至关重要.
- 目前用于抗生素敏感性测试的方法可能耗时.
研究的目的:
- 研究抗生素对细菌生长率和形态学的系统级影响.
- 为了将抗生素诱导的异质性与药物标和抗生素类别相关联.
- 开发一种快速的抗生素敏感性测试方法.
主要方法:
- 采用MAP平台来监测细菌的生长.
- 暴露于E.coli,S.aureus和P.aeruginosa的14种抗生素在11种度.
- 分析了人口增长率异质性 (PGRH) 和细胞形态.
主要成果:
- 随着抗生素度接近最小抑制度 (MIC),PGRH的增加.
- PGRH的大小与核糖体和抗生素点之间的功能距离相关.
- 蛋白质合成抑制剂显示PGRH最低;细胞壁抑制剂显示最高.
- 开发了MOR50,一种用于快速MIC估计的形态参数.
- 观察到形态变化和生长抑制之间存在强烈的相关性.
结论:
- 抗生素的干扰会引起细菌的系统级反应,其特点是生长速度异质.
- 异质性的程度与抗生素的作用机制有关.
- 开发了一种新的,快速的抗生素敏感性测试方法 (MOR50).
- 研究结果提供了细菌对抗生素反应的见解,可能为治疗策略提供信息.
更多相关视频
06:45Monitoring Intraspecies Competition in a Bacterial Cell Population by Cocultivation of Fluorescently Labelled Strains
Published on: January 18, 2014
8.5K
08:33Quantitative Polymerase Chain Reaction-based Analyses of Murine Intestinal Microbiota After Oral Antibiotic Treatment
Published on: November 17, 2018
12.8K
相关概念视频
00:57Antibiotic Selection
52.2K
Overview
52.2K
00:46Genomic DNA in Prokaryotes
43.3K
The genome of most prokaryotic organisms consists of double-stranded DNA organized into one circular chromosome in a region of cytoplasm called the nucleoid. The chromosome is tightly wound, or supercoiled, for efficient storage. Prokaryotes also contain other circular pieces of DNA called plasmids. These plasmids are smaller than the chromosome and often carry genes that confer adaptive functions, such as antibiotic resistance.
Genomic Diversity in Bacteria
Although bacterial genomes are much...
Genomic Diversity in Bacteria
Although bacterial genomes are much...
43.3K
01:27Combined Effects of Drugs: Synergism
3.7K
Synergism is a useful mechanism where combining two or more drugs is more effective than each constituent used alone. Such combinations are also called supra-additive interactions. The drugs collectively enhance the final therapeutic effect by acting on different targets. Another advantage is that the low dose of each constituent drug is sufficient to achieve the desired effect. This helps reduce the duration of therapy and lower the adverse effects of these drugs.
Such synergistic combinations...
Such synergistic combinations...
3.7K
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