原生动物增强的结合频率改变了土壤抗生素耐药性的传播
相关实验视频
Updated: May 30, 2025
05:18
High-Resolution Comparison of Bacterial Conjugation Frequencies
Published on: January 10, 2019
10.7K
Chenshuo Lin1,2, Li-Juan Li1,2, Kai Yang1
1State Key Laboratory for Ecological Security of Regions and Cities, Ningbo Urban Environment Observation and Research Station, Institute of Urban Environment, Chinese Academy of Sciences, 1799 Jimei Road, Xiamen 361021, China.
The ISME journal
|January 27, 2025
概括
土壤原生动物,如Colpoda steinii和Acanthamoeba castellanii,通过等离子体加速抗生素耐药性基因 (ARG) 的传播. 捕食增加了基因转移率,影响了环境抗生素耐药性.
科学领域:
- 环境微生物学环境微生物学
- 微生物生态学 微生物生态学
- 抗生素耐药性 抗生素耐药性
背景情况:
- 原生动物是土壤细菌的主要捕食者.
- 它们在传播抗生素耐药性基因 (ARG) 中的作用尚未得到充分研究.
- 由原生动物驱动的ARG传播机制尚不清楚.
研究的目的:
- 调查原生动物掠食如何影响土壤微生物群落中等离子体介导的ARG转移.
- 阐明原生动物驱动的ARG传播背后的机制.
主要方法:
- 使用光激活细胞分类,定量PCR (qPCR),元基因组学和逆转录 qPCR.
- 研究了Colpoda steinii和Acanthamoeba castellanii掠食对ARG转移的影响.
主要成果:
- 原生动物的掠食减少了整体等离子体的丰富性,但增加了与结合相关的基因表达.
- 观察到结合频率增加了5倍 (C. steinii) 和4.5倍 (A. castellanii).
- 确定了氧化应激,膜透性变化和SOS反应是增强转移的关键因素.
- 检测到等离子体宿主范围的变化以及携带ARG和毒性因子的特定转合类型的选择.
结论:
- 原生动物显著增强了土壤生态系统中ARG的结合转移.
- 这突出了一个新的微生物机制,推动了环境抗生素耐药性的传播.
- 这些发现为抗生素耐药性的生态动态提供了关键的见解.
相关概念视频
01:33Bacterial Transformation
55.1K
In 1928, bacteriologist Frederick Griffith worked on a vaccine for pneumonia, which is caused by Streptococcus pneumoniae bacteria. Griffith studied two pneumonia strains in mice: one pathogenic and one non-pathogenic. Only the pathogenic strain killed host mice.
Griffith made an unexpected discovery when he killed the pathogenic strain and mixed its remains with the live, non-pathogenic strain. Not only did the mixture kill host mice, but it also contained living pathogenic bacteria that...
Griffith made an unexpected discovery when he killed the pathogenic strain and mixed its remains with the live, non-pathogenic strain. Not only did the mixture kill host mice, but it also contained living pathogenic bacteria that...
55.1K
00:57Antibiotic Selection
52.2K
Overview
52.2K