这种CitAB双组件系统参与了禽病原菌大肠杆菌 (Escherichia coli) 病原体的病变调节
Zhuo Cheng1, Yuhang Chen1, Kai Ma1
1School of Life Sciences, Anhui Agricultural University, Hefei, 230036 Anhui China.
3 Biotech
|September 15, 2025
概括
鸟类致病性大肠杆菌 (APEC) CitA/CitB调节病毒毒性. CitA/CitB调节病毒毒性. 删除citAB增强了APEC中的生物膜形成和多药性耐药性,影响了家禽的健康.
科学领域:
- 微生物学 微生物学
- 动物科学动物科学
- 分子生物学分子生物学
背景情况:
- 禽类致病性大肠杆菌 (APEC) 引起大肠杆菌病,这是家禽的一种重大呼吸道疾病.
- 像CitA/CitB这样的双组件系统 (TCS) 调节了Enterobacteriaceae中的新陈代谢和应激适应.
- 在APEC病毒性中CITA/CitB的作用在很大程度上仍未确定.
研究的目的:
- 调查CitA/CitB两组系统在禽病原性大肠杆菌 (APEC) 中的功能.
- 确定CitA/CitB对APEC毒性,生物膜形成和多药耐药性的影响.
主要方法:
- 使用微阵列分析进行比较的转录概况,比较野生类型的APEC40和citAB删除突变体.
- 现型测定用于评估生物膜形成和多药物耐药性.
- 定量实时PCR (qRT-PCR) 用于验证基因表达变化.
主要成果:
- CitA/CitB显著影响APEC中许多基因的转录,包括与毒性和生物膜形成相关的基因.
- 无活化citAB导致增强生物膜形成能力和增加多种药物耐药性.
- 鉴定出CitAB是关键毒性相关基因的负调节者,例如mglB,fimB,glcB,mblC,ompC,ompW和pgaB.
结论:
- 在APEC中,CitA/CitB TCS充当了关键毒性因子的负调节者.
- 了解CITA/CitB的作用,可以了解APEC的病原和潜在的控制策略.
- 这项研究阐明了一种影响APEC在家禽中引起疾病的能力的新型监管机制.
更多相关视频
09:21A Ligated Intestinal Loop Model in Anesthetized Specific Pathogen Free Chickens to Study Clostridium Perfringens Virulence
Published on: October 11, 2018
9.9K
10:05Bile Salt-induced Biofilm Formation in Enteric Pathogens: Techniques for Identification and Quantification
Published on: May 6, 2018
13.3K
相关概念视频
01:28Gene Regulation in Microbial Communities: Quorum Sensing
533
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,...
533
01:31Defense Against Bacterial Pathogens
2.6K
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...
2.6K
01:23Stringent Response in E. coli
300
Bacterial growth is closely tied to nutrient availability, with cells proliferating exponentially under favorable conditions and entering a stationary phase when resources become scarce. This transition is mediated by a regulatory mechanism known as the stringent response, which allows bacteria to adapt to nutrient deprivation by modulating gene expression and metabolic activity.During nutrient scarcity, intracellular amino acid levels decline. It results in the accumulation of uncharged tRNAs...
300