银抗菌剂和氨基糖化物之间的协同作用是基于严重的宏分子损伤
bioRxiv : the preprint server for biology
|February 9, 2026
概括
银抗菌剂AGXX增强了氨基糖类抗生素,恢复了它们对抗多药耐药细菌的有效性. 这种组合疗法通过增加活性氧物种 (ROS) 和破坏细菌细胞来对抗感染.
科学领域:
- 抗微生物耐药性 抗微生物耐药性
- 纳米技术在医学中的应用
- 细菌病原发生的细菌.
背景情况:
- 耐多药性 (MDR) 细菌感染构成了严重的全球健康威胁.
- 泌尿病原性大肠杆菌 (UPEC) 是尿路感染 (UTI) 的常见原因之一.
- 需要新的策略来恢复现有的抗生素的疗效.
研究的目的:
- 为了研究银抗微生物AGXX®与氨基糖类抗生素的协同作用潜力.
- 探索任何观察到的协同效应背后的机制.
- 评估AGXX®-aminoglycoside组合对MDR临床隔离物的疗效,包括UPEC.
主要方法:
- 测试AGXX®与 جنت米辛,托布拉米辛,卡纳米辛和阿米卡辛结合对抗MDR格拉姆阴性和格拉姆阳性细菌.
- 测量细胞内活性氧物种 (ROS) 水平,蛋白质毒性压力,蛋白质聚合和DNA损伤.
- 评估ROS在通过使用ROS拾尸器的协同杀戮中的作用.
- 研究细菌的防御机制,包括多酸盐.
- 评估人工尿媒介和临床UPEC隔离物的疗效.
主要成果:
- 亚致命的AGXX®度显著增强了氨基糖化物介导的细菌杀死.
- 组合降低了针对耐药菌株的多种氨基糖化物有效度.
- AGXX®/氨基糖化物联合治疗诱导了大量的细胞内ROS积累,蛋白质毒性压力和DNA损伤.
- ROS清理取消了协同杀死效应.
- 聚酸盐被确定为对抗ROS引起的损伤的细菌防御机制.
- 在人工尿和临床UPEC分离物中保持了协同作用.
结论:
- AGXX®作为一种强有力的辅助剂,恢复了氨基糖化物对MDR细菌的疗效.
- 协同作用是由ROS诱导的大分子损伤驱动的.
- AGXX®-氨基糖化物组合疗法在治疗MDR细菌感染,特别是尿路感染方面表现有前途.
- 进一步开发AGXX®用于组合疗法是有必要的.
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