β-乳酸抗生素诱导与ROS生成相关的代谢干扰导致细菌衰竭
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Dongyang Ye1,2,3, Jing Sun1,4, Ran Jiang1
1College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China.
Frontiers in microbiology
|December 23, 2024
概括
三种β-乳糖抗生素破坏了大肠杆菌的新陈代谢,增加了活性氧物种和DNA/RNA损伤. 细菌试图通过氨基酸上调来修复,揭示了复杂的抗生素诱导的代谢适应.
科学领域:
- 微生物学 微生物学
- 生物化学 生物化学
- 药理学 药理学是指药理学的学科.
背景情况:
- 抗生素对于治疗细菌感染至关重要.
- 了解抗生素的作用机制是开发新疗法的关键.
- β-乳酸抗生素是一种广泛使用的抗微生物药物.
研究的目的:
- 为了研究梅罗,安培,和ceftazidime对大肠杆菌的全球代谢作用.
- 阐明β-lactam抗生素治疗与细菌中的氧化应激之间的关系.
- 为了识别细菌的代谢适应,以应对抗生素诱导的损害.
主要方法:
- 用美罗胺,安培,和ceftazidime治疗的大肠杆菌的代谢概况.
- 反应性氧物种 (ROS) 水平的量化.
- 测量氧化DNA和RNA损伤标记物 (8-OHdG和8-OHG).
- 对氨基酸概况的分析,以确定细胞修复机制.
主要成果:
- β-乳糖抗生素显著改变了代谢途径,包括谷氨,潘托酸和CoA,pyrimidine和 purin代谢.
- 抗生素治疗显著增加了ROS水平 (美洛:约200%,安培:约174%,塞夫塔齐迪姆:约152%).
- 氧化DNA/RNA损伤标志物显著增加 (8-OHdG:高达~4.7倍,8-OHG:高达~5.6倍).
- 检测到参与细胞修复机制的特定氨基酸的升级.
结论:
- β-乳酸抗生素诱导大肠杆菌复杂的代谢干扰,与增加ROS产量和氧化损伤有关.
- 细菌表现出代谢适应,包括氨基酸上调,以抵消抗生素诱导的损害.
- 这些发现提供了对抗生素作用和对抗耐药病原体的潜在策略的见解.
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