使用植物动力学推断量化药物耐药的西格拉菌种中的等离子体运动
Nicola F Müller1,2, Ryan R Wick3, Louise M Judd4
1Division of HIV, ID and Global Medicine, University of California San Francisco, San Francisco, California, United States of America.
PLoS pathogens
|December 1, 2025
概括
我们开发了一种新的计算方法来跟踪抗微生物耐药性 (AMR) 基因如何通过塑体在细菌之间移动. 这有助于了解AMR的传播,这是一个主要的全球健康威胁.
科学领域:
- 微生物学 微生物学
- 进化生物学 进化生物学
- 计算生物学 计算生物学
背景情况:
- 抗菌素耐药性 (AMR) 是一个日益严重的全球健康危机.
- 抗菌激素基因经常位于等离子体上,这些是可以在细菌之间转移的移动遗传元素.
- 量化等离子体运动和AMR基因传播在计算上具有挑战性.
研究的目的:
- 引入一种新的计算方法,用于重建和量化细菌群中的等离子体运动.
- 模拟染色体和等离子体DNA的共同进化,以推断等离子体转移事件.
- 在五年时间内分析Shigella种群中的AMR等离子体动态.
主要方法:
- 开发了一种贝叶斯系遗传网络方法,模拟了联合染色体和等离子体DNA的共同进化.
- 结合了凝聚过程和等离子体转移模型来推断进化历史.
- 将该方法应用于5年的Shigella数据集,分析了5种具有不同AMR和毒性概况的等离子体.
主要成果:
- 重建了一个大型Shigella毒性等离子体与染色体DNA的共同进化.
- 对三种在Shigella sonnei血统之间移动的小等离子体进行了量化较高的转移率.
- 确定了S. sonnei和S. flexneri之间一种多抗药性等离子体的最近独立传播事件.
结论:
- 这种新的方法准确地重建了等离子体的运动和细菌系之间的转移率.
- 这种方法提高了对携带AMR的等离子体动态的理解,包括引入,循环和维护.
- 这些发现突出了特定的等离子体转移事件,这些事件有助于西格拉菌中多药耐药性的传播.
相关概念视频
01:19Drug Absorption Mechanism: Carrier-Mediated Membrane Transport
Certain large, lipid-insoluble drug molecules that resemble amino acids, peptides, or glucose, require specialized carrier proteins to facilitate their diffusion across cell membranes. This transport can occur through either facilitated diffusion, which does not require energy input, or active transport, which does require energy input.
Facilitated diffusion is a passive process that utilizes human Solute Carrier (SLC) transporters. These transporters bind to the drug, undergo structural...
Facilitated diffusion is a passive process that utilizes human Solute Carrier (SLC) transporters. These transporters bind to the drug, undergo structural...
01:22Drugs Affecting GI Tract Motility: Bulk-Forming and Stimulant Laxatives
Laxatives enhance bowel movements and alleviate constipation. They augment the stool's bulk, stimulate intestinal muscle contractions, draw water into the intestines, or soften the stool. There are five key types of laxatives: bulk laxatives, stimulant laxatives, osmotic laxatives, stool softeners, and lubricant laxatives.
Bulk-forming laxatives, such as psyllium, methylcellulose, and polycarbophil, absorb water in the intestine, increasing stool bulk and promoting bowel movement. This makes...
Bulk-forming laxatives, such as psyllium, methylcellulose, and polycarbophil, absorb water in the intestine, increasing stool bulk and promoting bowel movement. This makes...
01:20Drugs Affecting GI Tract Motility: Other Laxatives
Laxatives are primarily used to alleviate constipation, a common gastrointestinal disorder characterized by infrequent bowel movements and difficulty passing stools. They work by various mechanisms to increase the volume or frequency of bowel movements. The primary modes of action of laxatives include increasing stool bulk, softening the stool, stimulating intestinal motility, and osmotically drawing water into the intestines.
Osmotic or saline laxatives, like magnesium hydroxide or milk of...
Osmotic or saline laxatives, like magnesium hydroxide or milk of...