沙门氏菌的机制 typhimurium 对大麻二醇的耐药性
Iddrisu Ibrahim1, Joseph Atia Ayariga1, Junhuan Xu2
1The Microbiology Program, College of Science, Technology, Engineering, and Mathematics, Alabama State University, Montgomery, AL 36104, USA.
Microorganisms
|March 27, 2025
概括
大麻素 (CBD) 对沙门氏菌 (Salmonella typhimurium) 具有抗菌作用,但耐药性发展. 这项研究发现,S. typhimurium中的CBD耐药性涉及脂多糖 (LPS) 和膜类固醇的变化,BlaTEM基因表达显著增加.
科学领域:
- 微生物学与传染病的研究
- 药理学与药物耐药性 药理学与药物耐药性
- 遗传学和分子生物学
背景情况:
- 像沙门氏菌 (S. typhimurium) 这样的病原体的多药性耐药性 (MDR) 是全球卫生危机,超过了抗生素的发展.
- 迫切需要新的抗微生物药物来对抗MDR病原体,特别是针对弱势群体和医疗保健相关的感染.
- 以前的研究表明,大麻素 (CBD) 对S. typhimurium具有抗菌活性,但随着时间的推移,耐药性可能会出现.
研究的目的:
- 研究沙门氏菌 (S. typhimurium) 对大麻素 (CBD) 产生耐药性的机制.
- 分析导致S. typhimurium菌株对CBD耐药性的结构和遗传因素.
- 确定克服S. typhimurium中CBD耐药性的潜在治疗点.
主要方法:
- 在对CBD敏感和对CBD耐药的S. typhimurium菌株中,对脂聚糖化物 (LPS) 和膜醇丰度的比较分析.
- 实时定量聚合酶连锁反应 (rt-qPCR) 来评估S. typhimurium中选择的耐药性相关基因的表达水平.
- 细菌细胞表面分子和基因表达特征的量化.
主要成果:
- 耐CBD的S. typhimurium表现出明显更高的blaTEM (超过150倍),fimA (超过12倍),fimZ (超过55倍) 和整体素2 (超过1.5倍) 的表达.
- 观察到细胞表面分子丰度的显著变化,包括LPS (1.76 nm),ergosterols (1.03 nm),油酸 (0.10 nm) 和MPPSE (2.25 nm).
- blaTEM基因表达增加最高,这表明它是S. typhimurium中CBD耐药性的主要贡献者.
结论:
- 在S. typhimurium中,CBD耐药性的发展是多因素的,涉及结构变化 (LPS,膜固醇) 和遗传因素.
- 涉及CBD耐药性的关键基因包括blaTEM,fimA,fimZ和integron 2,以及其他如ompC,STM0716,lrp/STM0959和间基因.
- 准blaTEM基因是一个有前途的策略,用于开发新药来对抗抗CBD耐药的S. typhimurium菌株.
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