菌体-菌体竞争和生物膜会影响两种毒性细菌体和Pseudomonas aeruginosa之间的相互作用
Magdalena Bürkle1, Imke H E Korf2, Anne Lippegaus3
1Department of Infectious Diseases, Respiratory Medicine and Critical Care, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, 10117 Berlin, Germany.
The ISME journal
|April 6, 2025
概括
有毒的菌体 (病毒) 可以减少Pseudomonas aeruginosa,但会出现耐药性. 结合菌体和抗生素对生物膜有效,而菌体竞争影响细菌相互作用.
科学领域:
- 微生物学 微生物学
- 病毒学 病毒学
- 细菌学 细菌学是一门学科.
背景情况:
- 病毒性菌体 (菌体) 是感染和溶解特定细菌宿主的病毒.
- 与多个菌体同时感染可以改变细菌溶解动力学和宿主菌体相互作用.
- 了解菌-细菌相互作用对于菌治疗的发展至关重要.
研究的目的:
- 研究影响两种毒性菌体和 Pseudomonas aeruginosa 在不同生长状态 (浮游生物,细胞系,生物膜) 之间的相互作用的因素.
- 在共感染期间测量细菌的杀时动力学和个体菌体复制.
- 识别菌素耐药性和菌素之间的竞争机制.
主要方法:
- 在单剂和并发条件下评估细菌活力和菌体复制动力学.
- 评估菌体对浮游生物P. aeruginosa,感染的肺细胞培养物和静态/粘附生物膜的疗效.
- 分析菌体吸附,溶解时间和菌体耐药细菌变体的出现.
- 研究美罗胺抗生素与菌体结合的影响.
主要成果:
- 菌体有效地减少了浮游生物P. aeruginosa和受感染的细胞培养物,但产生了耐药性.
- 菌体组合显示出初始的生物膜抑制;需要持续控制的美罗.
- 附着生物膜对菌体和/或美罗胺表现出耐受性,表明了时空变化.
- 一种更快的菌体耗尽了资源,在另一种菌体中创造了竞争劣势和交叉抵抗.
- 菌体-菌体竞争和抵抗机制是P. aeruginosa基因型依赖的.
结论:
- 细菌生长状态显著影响菌体的有效性和耐药性的出现.
- 菌体-菌体竞争和细菌基因型依赖的耐药性影响了菌体治疗的结果.
- 顺序的菌体施用并没有增强溶解,突出显示了复杂的相互作用.
相关概念视频
01:30Lytic Cycle of Bacteriophages
70.0K
Bacteriophages, also known as phages, are specialized viruses that infect bacteria. A key characteristic of phages is their distinctive “head-tail” morphology. A phage begins the infection process (i.e., lytic cycle) by attaching to the outside of a bacterial cell. Attachment is accomplished via proteins in the phage tail that bind to specific receptor proteins on the outer surface of the bacterium. The tail injects the phage’s DNA genome into the bacterial cytoplasm. In the...
70.0K
00:43Lysogenic Cycle of Bacteriophages
61.5K
In contrast to the lytic cycle, phages infecting bacteria via the lysogenic cycle do not immediately kill their host cell. Instead, they combine their genome with the host genome, allowing the bacteria to replicate the phage DNA along with the bacterial genome. The incorporated copy of the phage genome is called the prophage. Some prophages can re-activate and enter the lytic cycle. This often occurs in response to a perturbation, such as DNA damage, but can also transpire in the absence of...
61.5K