抗生素抑制的分子机制对微生物异型降解铁的抑制作用
Bowei Ouyang1, Ziyue Lv1, Cui Gan1
1MOE Key Laboratory of Groundwater Quality and Health, School of Environmental Studies, China University of Geosciences, Wuhan, China.
Journal of hazardous materials
|April 29, 2025
概括
微量抗生素对微生物铁循环产生影响. 不同的抗生素通过不同的机制影响异型铁减少 (DIR),改变微生物新陈代谢和环境铁过程.
科学领域:
- 环境微生物学环境微生物学
- 生物地质化学生物地质化学
背景情况:
- 微生物的铁循环对于生物地化学过程至关重要.
- 微量抗生素对微生物介导的异型降铁 (DIR) 的影响基本上是未知的.
研究的目的:
- 为了研究四种抗生素对Shewanella oneidensis MR-1DIR的影响.
- 确定抗生素如何影响直接,可溶性介质依赖和纳米线介导的细胞外电子转移 (EET) 途径.
主要方法:
- 暴露Shewanella oneidensis MR-1在不同度的塞夫蒂佐克西姆,聚米辛,奥洛克萨和四环素中.
- 对DIR活动的评估和对细胞外电子转移 (EET) 途径的影响的分析.
主要成果:
- 塞夫西胺以剂量依赖的方式抑制了DIR,在64μg/L时完全抑制.
- 聚米辛通过破坏细胞膜和电子输送链 (ETC) 来引起可逆的DIR减少.
- 牛洛素和四环素通过降低参与电子产生和转移的基因来不可逆地抑制DIR,损害ETC和EET.
结论:
- 抗生素显著改变微生物的铁代谢.
- 这些发现为抗生素对铁循环的环境影响提供了新的见解.
更多相关视频
12:08Monitoring the Reductive and Oxidative Half-Reactions of a Flavin-Dependent Monooxygenase using Stopped-Flow Spectrophotometry
Published on: March 18, 2012
15.0K
07:28Metabolic Profiling to Determine Bactericidal or Bacteriostatic Effects of New Natural Products using Isothermal Microcalorimetry
Published on: October 29, 2020
8.5K
相关概念视频
Antimicrobial Proteins
725
Antimicrobial proteins are important components of the immune system. They aid the body in combating pathogens by either killing them directly or hindering their replication processes. Four main types of antimicrobial substances are interferons, the complement system, iron-binding proteins, and antimicrobial proteins.
Interferons
Interferons (IFNs) are proteins produced by lymphocytes, macrophages, and fibroblasts infected with viruses. While IFNs cannot prevent viruses from entering and...
Interferons
Interferons (IFNs) are proteins produced by lymphocytes, macrophages, and fibroblasts infected with viruses. While IFNs cannot prevent viruses from entering and...
725
The Electron Transport Chain
15.7K
The electron transport chain or oxidative phosphorylation is an exothermic process in which free energy released during electron transfer reactions is coupled to ATP synthesis. This process is a significant source of energy in aerobic cells, and therefore inhibitors of the electron transport chain can be detrimental to the cell's metabolic processes.
Inhibitors of the electron transport chain
Rotenone, a widely used pesticide, prevents electron transfer from Fe-S cluster to ubiquinone or Q...
Inhibitors of the electron transport chain
Rotenone, a widely used pesticide, prevents electron transfer from Fe-S cluster to ubiquinone or Q...
15.7K
Combined Effects of Drugs: Synergism
3.6K
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...
3.6K
Enzyme Inhibition
77.4K
Inhibitors are molecules that reduce enzyme activity by binding to the enzyme. In a normally functioning cell, enzymes are regulated by a variety of inhibitors. Drugs and other toxins can also inhibit enzymes. Some inhibitors bind to the enzyme’s active site, while others inhibit enzymatic activity by binding to other sites on the protein structure.
77.4K
Antibiotic Selection
51.9K
Overview
51.9K
Types of RNA
62.6K
Overview
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA...
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA...
62.6K
