两个组成的传感器因子envZ影响抗生素耐药性和毒性在多药耐药沙门氏菌肠炎的进化动态,导致多站点入侵性感染
Lifei Yu1,2, Xinhong Han3,4, Wang Zhang5
1Department of Infectious Diseases, Affiliated Hangzhou First People's Hospital, School of Medicine, Westlake University, Hangzhou 310006, China.
The Journal of antimicrobial chemotherapy
|October 4, 2024
概括
多药耐药沙门氏菌Enteritidis envZ基因的突变增加了抗生素耐药性和毒性. 这些envZ突变增强了细菌的生存和在感染中传播.
科学领域:
- 微生物学 微生物学
- 遗传学 遗传学 是一个
- 传染性疾病 传染性疾病
背景情况:
- 多药耐药 (MDR) 沙门氏菌对公众健康构成重大威胁.
- 了解MDR和毒性背后的遗传机制对于开发有效的治疗方法至关重要.
研究的目的:
- 研究两组分传感器envZ基因突变在MDR沙门氏菌肠炎的抗生素耐药性和毒性中的作用.
- 探索 envZ 突变对临床 Salmonella enteritidis 菌株的进化动态的影响.
主要方法:
- 全基因组测序 (WGS) 用于分析抗生素耐药性基因,病毒性基因和单核酸多态 (SNP).
- 用RNA测序和定量RT-PCR来评估基因表达水平.
- 使用Galleria mellonella感染模型和基于细胞的体外测试来评估病毒性.
主要成果:
- 在临床Salmonella enteritidis与侵入性感染相关的菌株中发现了envZ突变.
- 这些突变导致外部膜蛋白 ompD 和 ompF 的表达减少.
- envZ突变体表现出增强的毒性,增强的粘附性,入侵性和对细胞形成的抵抗性,以及减少的生物膜形成和生长率.
结论:
- 该研究确定了envZ在临床Salmonella enteritidis中影响抗生素耐药性和毒性方面的新型遗传作用.
- envZ突变通过降低ompD和ompF表达来促进抗生素耐药性,并增强细菌毒性,促进多部位感染,增加适应性.
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