在tmexCD-toprJ阳性细菌中通过素补充恢复tigecycline的疗效
Fulei Li1, Tianqi Xu1, Dan Fang1
1Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, College of Veterinary Medicine, Yangzhou University, Yangzhou, China.
International journal of antimicrobial agents
|April 17, 2025
概括
氨酸通过增加药物吸收和抑制排泄来提高tigecycline对抗耐药细菌的有效性. 这种组合疗法在治疗由tmexCD-toprJ阳性病原体引起的感染方面显示出更好的疗效.
科学领域:
- 微生物学 微生物学
- 药理学 药理学是指药理学的学科.
- 传染性疾病 传染性疾病
背景情况:
- 抗菌素耐药性 (AMR) 构成了全球健康的重大威胁.
- 作为最后一种抗生素的tigecycline,由于tmexCD1-toprJ1排泄,其有效性降低了.
- 代谢物-抗生素组合提供了一种打击耐药细菌的策略.
研究的目的:
- 为了评估氨酸对抗耐药细菌的tigecycline的强化作用.
- 阐明 lysine 增强tigecycline 活性的机制.
- 在体内评估 lysine-tigecycline 组合的治疗疗效.
主要方法:
- 在体外研究:细菌活力,时间杀伤动力学,持续性分析,生物膜消除.
- 在体内评估:小鼠系统性感染模型.
- 机械探索:转录基因分析,生物化学验证.
主要成果:
- 氨酸协同增强了对tmexCD-toprJ阳性细菌的tigecycline疗效.
- 氨酸通过改变膜透性和∆pH来增加tigecycline的吸收.
- 氨酸抑制硫化的产生,诱导ROS,并降低排泄能量代谢的调节.
结论:
- 氨酸作为tigecycline增强剂,克服了tmexCD-toprJ介导的耐药性.
- 组合疗法在临床前模型中显示了改善的治疗结果.
- 氨酸是对抗耐药细菌感染的有前途的药物.
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