在Mycobacterium smegmatis中,ATP爆发是抗生素致死性的主要驱动因素
Tejan Lodhiya1, Aseem Palande1, Anjali Veeram1
1Department of Biology, Indian Institute of Science Education and Research (IISER), Tirupati, India.
eLife
|January 13, 2026
概括
细菌对抗生素的耐受性尚不清楚. 这项研究表明,某些抗生素会增加细菌的新陈代谢,导致细胞死亡主要是通过ATP爆发,而不是氧化应激,为抗生素作用提供了新的见解.
科学领域:
- 微生物学 微生物学
- 生物化学 生化学
- 分子生物学分子生物学
背景情况:
- 细菌对抗生素的耐受性在感染控制方面提出了重大挑战.
- 菌根菌中的表型耐受性有助于抗生素耐药性,但机制尚不清楚.
研究的目的:
- 为了研究M. smegmatis对氨基糖化物和诺基诺抗生素的生理反应.
- 阐明抗生素诱导的细菌细胞死亡和耐受性背后的机制.
主要方法:
- 蛋白质组学是指蛋白质组学.
- 13C同位素分析分析
- 基因和生化分析.
主要成果:
- 两种抗生素类别诱导了类似的生理反应,包括增加TCA循环流量,呼吸,ROS生成和ATP产生.
- 过度的ATP水平,而不是ROS,被确定为杀死细菌的主要因素,可能是通过金属离子绑定.
- 同位素追踪揭示了适应机制,如TCA循环流量偏差,增强的内在耐药性和增加发展抗生素耐药性的倾向.
结论:
- 抗生素的作用涉及复杂的生理反应,超出了直接杀死.
- 增加的ATP水平在抗生素诱导的细菌死亡中起着关键作用.
- 细菌对抗生素的适应包括代谢重编程和增强的耐药机制.
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