比西克洛米产生ROS并阻断大肠杆菌的细胞分裂
1CSIR-Institute of Microbial Technology, Chandigarh, India.
PloS one
|March 29, 2024
概括
双菌素 (BCM) 抗生素在大肠杆菌中产生反应性氧物种 (ROS),导致细胞丝和DNA损伤. 这表明ROS有助于BCM.
科学领域:
- 微生物学 微生物学
- 细菌生理学 细菌生理学
- 抗微生物耐药性 抗微生物耐药性
背景情况:
- 反应性氧物种 (ROS) 在抗生素诱导的细菌杀死中的作用受到争论.
- 双菌素 (BCM) 是一种广泛的抗生素,向大肠杆菌转录因子Rho.
- 了解BCM的毒性机制对于开发有效的抗生素治疗至关重要.
研究的目的:
- 研究ROS在BCM抗菌活性中的作用.
- 探索在大肠杆菌中BCM诱导的细胞纤维化背后的机制.
- 评估BCM在菌体-抗生素协同疗法 (PAS) 中的潜力.
主要方法:
- 大肠杆菌菌株 (包括删除的hns和Δkil) 对BCM的暴露.
- 测量ROS生成的情况.
- 光显微镜观察RECA-GFP局部化和细胞形态.
- 对DNA分割和细胞隔膜形成的分析.
- 在BCM治疗后对生物膜形成的评估.
主要成果:
- 在大肠杆菌中,BCM治疗诱导了ROS生成.
- BCM引起了与SOS反应和DNA损伤相关的细胞线.
- 基因组DNA分裂,但细胞隔膜形成受损.
- 在E. coli中,BCM治疗促进了生物膜的形成.
- RecA-GFP 细丝与受损的 DNA 位点结合在一起.
结论:
- ROS的产生与BCM的抗菌作用和细胞线程有关.
- BCM诱导DNA损伤并破坏细胞分裂,导致其毒性.
- BCM诱导纤维化的能力表明了菌体-抗生素协同作用 (PAS) 疗法的潜力.
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