卡瓦克罗尔抑制了机会主义细菌 (Aeromonas hydrophila) 的质量检测
Liushen Lu1, Junwei Wang2, Ting Qin1
1Key Laboratory of Aquatic Animal Nutrition and Health, Freshwater Fisheries Research Center, Chinese Academy of Fishery Science, Wuxi 214081, China.
Microorganisms
|August 26, 2023
概括
卡瓦克罗尔是一种天然的植物化合物,有效地抑制了细菌的定数感应 (QS) 并降低了病原性细菌的毒性,如Aeromonas hydrophila. 这种天然的QS抑制剂为水产养殖中抗生素提供了潜在的替代品.
科学领域:
- 微生物学 微生物学
- 自然产品化学 自然产品化学
- 水产养殖是水产养殖的一种方式.
背景情况:
- 细菌的定数感应 (QS) 通过化学信号调节毒性因素.
- 抑制QS是一种控制病原性细菌的有希望的策略.
- 自然化合物为传统抗生素提供了潜在的替代品.
研究的目的:
- 为了研究卡瓦克罗尔作为质量检测抑制剂的有效性.
- 评估卡瓦克罗尔对Aeromonas hydrophila病原性的影响.
- 探索卡瓦克罗尔在水产养殖中的潜在应用.
主要方法:
- 测试卡瓦克罗尔在Chromobacterium violaceum中的QS抑制活性.
- 评估卡瓦克罗尔对Aeromonas hydrophila中的N-acyl-homoserine乳 (AHL) 生产的影响.
- 分析关键QS基因 (ahyR/I) 的表达,并进行分子对接.
主要成果:
- 卡瓦克罗尔显著降低了C. violaceum中的紫素产量 (62.46%).
- 卡瓦克罗尔治疗降低了A. hydrophila (36.01%) 的AHL度,并降低了AHYR/I基因表达的调节.
- 分子对接支持卡瓦克罗尔在QS抑制中的作用.
结论:
- 卡瓦克罗尔有效地抑制细菌QS,并减少致病细菌的毒性.
- 卡瓦克罗尔是一种可行的天然策略,可以减轻水产养殖中的细菌病原性.
- 这种方法可以减少水产养殖环境中对抗生素的依赖.
相关概念视频
01:28Gene Regulation in Microbial Communities: Quorum Sensing
39
Quorum sensing is a mechanism of bacterial communication that enables coordinated gene expression in response to changes in population density. This facilitates collective behaviors that enhance survival, resource acquisition, and ecological adaptation. This process relies on small signaling molecules called autoinducers that accumulate as bacterial populations grow. When a critical threshold concentration of autoinducers is reached, bacterial cells collectively modify gene expression,...
39
01:30Bacterial Signaling
32.7K
Bacterial signaling can occur within bacteria (intracellular) or between bacteria (intercellular). At times, a group of bacteria behaves like a community. To achieve this, they engage in quorum sensing, the perception of higher cell density that causes changes in gene expression. Quorum sensing involves both extracellular and intracellular signaling. The signaling cascade starts with a molecule called an autoinducer (AI). Individual bacteria produce AIs that move out of the bacterial cell...
32.7K
01:27Chemical Agents for Microbial Control
54
Chemicals play important roles in controlling microbial growth by targeting microbial structures and functions as sanitizers, antiseptics, disinfectants, and sterilants.Alcohols are commonly used sanitizers, effectively disrupting lipid membranes, which compromises cell integrity. They are also used as antiseptics and disinfectants due to their rapid action and versatility.Phenols and their derivatives phenolics , known for denaturing proteins and disrupting cell membranes, are particularly...
54
01:28Antimicrobial Effectiveness
48
The effectiveness of antimicrobial agents depends on various factors influencing their ability to eliminate microbial populations. Larger microbial populations require more time for complete eradication, emphasizing the importance of population size analysis when evaluating antimicrobial efficacy.Microbial resistance to antimicrobial agents varies significantly. Highly resilient microorganisms include endospores, gram-negative bacteria, and non-enveloped viruses, while prions are exceptionally...
48
01:29Methods for Controlling Microbial Growth
69
Microbial growth control refers to various methods employed to inhibit, reduce, or eliminate microorganisms to ensure safety and hygiene across different settings. These methods are categorized based on the target environment and the level of microbial control required.Biocides are versatile agents designed to control microorganisms by either inhibiting their growth or outright killing them. These agents work through various physical, chemical, mechanical, or biological mechanisms. The...
69
01:27Chemotaxis in E. coli
37
Chemotaxis in Escherichia coli is a sensory-driven motility mechanism that enables bacteria to navigate chemical gradients, moving toward beneficial environments while avoiding harmful conditions. This process relies on a signal transduction system integrating external chemical cues with flagellar motor control.Chemoreceptors and Signal DetectionE. coli detects chemical gradients through methyl-accepting chemotaxis proteins (MCPs), which are membrane-bound chemoreceptors that sense attractants...
37