相关实验视频

Updated: Jul 13, 2025

The Citrobacter rodentium Mouse Model: Studying Pathogen and Host Contributions to Infectious Colitis

The Citrobacter rodentium Mouse Model: Studying Pathogen and Host Contributions to Infectious Colitis

Published on: February 19, 2013

定数感应调节了胃肠病原体Citrobacter rodentium的细菌毒性和殖民动态

Jorge Peña-Díaz^1,2, Sarah E Woodward^1,2, Anna Creus-Cuadros^1,2

¹Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC, Canada.

|October 16, 2023

概括

质量检测 (QS) 调节了消化道中的细菌毒性. 破坏QS可能会意外地增加病原体的毒性,从而挑战其作为抗微生物策略的使用.

科学领域:

微生物学微生物学
细菌的传播细菌的传播
传染性疾病传染性疾病

背景情况:

量子感应 (QS) 允许细菌根据人口密度进行交流和协调行为.
质素是抗微生物策略的潜在目标,但其在哺乳动物消化道中的作用尚不清楚.
杆菌 (Citrobacter rodentium) 是一种用于模拟致病性大肠杆菌感染的小鼠病原体.

研究的目的:

为了研究哺乳动物消化道内的Citrobacter rodentium中QS介导的通信.
为了确定QS在感染期间对C. rodentium毒性的影响.

主要方法:

利用液体染色学-双重质谱法 (LC-MS/MS) 来识别QS分子.
在体外和体内在整个胃肠道部位的分析QS分子积累.
在没有QS能力的情况下评估了C. rodentium的毒性.

主要成果:

通过CroIR系统识别了三种由C. rodentium通过CroIR系统产生的QS分子.
描述了这些QS分子在感染期间的积累模式.
观察到C. rodentium缺乏QS能力的增强毒性.

结论:

QS作为C. rodentium毒性的调节机制,适应病原体的殖民和传播环境.
抑制QS可能不是一种普遍有效的策略来控制细菌毒性.
这项研究强调了QS在消化道内宿主-病原体相互作用中的复杂作用.

关键词:

美国劳工法 (AHLs)议员数量检测是指对议员数量进行检测.在RNA-seqqq.自动诱导器自动诱导器细菌附着物是细菌的附着物.细菌传播是一种细菌传播.化学信号传递化学信号传递病变的发生和发病.第三种类型的分泌系统.毒性毒性是一种毒性.

更多相关视频

A Fluorescence-based Method to Study Bacterial Gene Regulation in Infected Tissues

A Fluorescence-based Method to Study Bacterial Gene Regulation in Infected Tissues

Published on: February 19, 2019

Anti-virulent Disruption of Pathogenic Biofilms using Engineered Quorum-quenching Lactonases

Anti-virulent Disruption of Pathogenic Biofilms using Engineered Quorum-quenching Lactonases

Published on: January 1, 2016

相关概念视频

Gene Regulation in Microbial Communities: Quorum Sensing

Gene Regulation in Microbial Communities: Quorum Sensing

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,...

Bacterial Signaling

Bacterial Signaling

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...

Global Regulatory Systems

Global Regulatory Systems

Global regulatory systems in bacteria enable rapid and coordinated responses to environmental changes by integrating sensory inputs with gene expression, ensuring efficient adaptation to fluctuating conditions. Key global regulatory mechanisms include regulons, two-component systems, sigma factors, and secondary messengers.Regulons and Global RegulatorsA regulon is a collection of genes and operons controlled by a common global regulator. These regulators enable bacteria to prioritize resource...