托塔罗尔通过抗生素膜和对抗抗菌素耐药Enterococcus faecalis的联合相互作用表现出抗菌作用
Ga-Eun Hyeon1, Yong-Bin Eom1,2
1Department of Biomedical Laboratory Science, College of Medical Sciences, Soonchunhyang University, Asan, Chungnam, 31538, Republic of Korea.
Canadian journal of microbiology
|July 26, 2024
概括
托塔罗尔是一种天然化合物,具有强大的抗菌和抗菌膜活性,可以对抗抗康氏素耐药的菌 (Enterococcus faecalis,VREF). 它还降低了关键的毒性基因的调节,这表明它有可能作为VREF感染的辅助疗法.
科学领域:
- 微生物学 微生物学
- 自然产品化学 自然产品化学
- 传染性疾病 传染性疾病
背景情况:
- 过度使用抗生素导致了抗万科胺素耐药性肠球菌 (VRE) 的增加,这对脆弱患者群体构成重大威胁.
- 多种药物耐药性需要探索针对VRE的替代治疗策略.
- 抗菌素的菌菌 (Enterococcus faecalis) (VREF) 在医疗保健环境中构成了关键的挑战.
研究的目的:
- 为了评估托塔罗尔的抗菌和抗菌膜疗效,一个来自Podocarpus totara的化合物,对VREF.
- 为了研究托塔罗尔对VREF病毒性基因表达的影响.
- 为了评估托塔罗尔作为一种辅助疗法的潜力,与vancomycin结合使用.
主要方法:
- 对托塔罗的最低抑制度 (MIC) 和最低生物膜抑制度 (MBIC) 和最低生物膜消除度 (MBEC) 根据VREF的确定.
- 同焦激光扫描显微镜 (CLSM) 可视化托塔罗尔对生物膜形成和细菌活力的影响.
- 消耗时间的测试来评估托塔罗尔和万科米的协同作用.
- 定量聚合酶连锁反应 (qPCR) 用于分析VREF毒性基因 (vanA,ace,asa,efaA,esp) 的表达.
主要成果:
- 托塔罗尔在低度 (0.25μg/mL) 时表现出对VREF的强烈抗菌活性.
- 托塔罗尔有效抑制和消除VREF生物膜,减少生物膜质量和细菌活力.
- 使用亚致死性托塔罗和万科米辛的联合治疗显示出增强的抗菌作用.
- 托塔罗尔暴露导致关键VREF毒性基因的度依赖下调.
结论:
- 托塔罗尔对VREF具有显著的抗菌和抗菌膜特性.
- 托塔罗尔作为辅助疗法具有前景,有可能增强万科米辛的疗效,并对抗VREF.
- 进一步的体外研究是有必要的,以探索托塔罗尔在VREF治疗中的临床影响.
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