相关实验视频

Updated: Jan 16, 2026

Isolation and Identification of Waterborne Antibiotic-Resistant Bacteria and Molecular Characterization of their Antibiotic Resistance Genes

Isolation and Identification of Waterborne Antibiotic-Resistant Bacteria and Molecular Characterization of their Antibiotic Resistance Genes

Published on: March 3, 2023

在临床Pseudomonas aeruginosa分离物中复杂的Ceftolozane-tazobactam耐药性途径:基因组流行病学研究

Hoai-An Nguyen¹, Anton Y Peleg², Jiangning Song³

¹Department of Infectious Diseases, The Alfred Hospital and School of Translational Medicine, Monash University, Melbourne, Australia.

Clinical microbiology and infection : the official publication of the European Society of Clinical Microbiology and Infectious Diseases

|September 28, 2025

概括

对Pseudomonas aeruginosa的基因组分析揭示了复杂的ceftolozane/tazobactam耐药机制. 发现了新的PA3329和PA4311基因,以及对ftsI突变的低估作用.

科学领域:

基因组学就是基因组学.
微生物学微生物学
抗微生物耐药性抗微生物耐药性

背景情况:

塞夫托洛赞/塔扎巴克坦 (C/T) 是一种关键的抗生素,用于治疗多抗药性Pseudomonas aeruginosa感染.
了解C/T耐药性的基因组基础对于有效的治疗策略至关重要.

研究的目的:

对P. aeruginosa.中C/T耐药机制进行全面的基因组分析.
将新的机构数据与公共测序数据相结合,以进行可靠的分析.
确定C/T耐药性的已知和新型遗传决定因素.

主要方法:

全基因组测序和1682P. aeruginosa分离物的微稀释易感性测试.
对之前报告的抗药性机制的分析.
全基因组关联研究 (GWAS) 和机器学习以识别新型抗性基因.
分子对接模拟以评估突变对抗生素结合的影响.

主要成果:

20.4%的分离物是抗C/T的.
已知耐药基因 (ftsI, mpl, ampD, ampC, ampR, oprD) 的突变很常见,但也存在于易受影响的孤立体中.
通过GWAS和机器学习,确定了与耐药性相关的五个关键基因:ftsI,ampR,ampC,PA3329和PA4311.
在ftsI (R504C) 的特定突变显著降低了ceftolozane的结合亲和力.

结论:

P. aeruginosa表现出复杂的基因组路径,有助于C/T耐药性.
编码青素结合蛋白3的ftsI基因在C/T耐药性中起着重要的,但可能被低估的作用.
两种新型基因PA3329和PA4311被确定为可能与C/T耐药性相关,需要进一步的功能特征.

关键词:

抗微生物耐药性抗微生物耐药性塞夫托洛 / 塔扎巴克坦全基因组关联研究研究.机器学习是机器学习.伪omonas aeruginosa 这种类型的病毒.

更多相关视频

Testing the Role of Multicopy Plasmids in the Evolution of Antibiotic Resistance

Testing the Role of Multicopy Plasmids in the Evolution of Antibiotic Resistance

Published on: May 2, 2018

Replication of the Ordered, Nonredundant Library of Pseudomonas aeruginosa strain PA14 Transposon Insertion Mutants

Replication of the Ordered, Nonredundant Library of Pseudomonas aeruginosa strain PA14 Transposon Insertion Mutants

Published on: May 4, 2018

相关概念视频

Development of Antibiotic Resistance

Development of Antibiotic Resistance

Antibiotic resistance is a major public health concern that arises when bacteria evolve mechanisms to withstand the effects of antibiotic treatments. This resistance can be intrinsic, acquired through genetic mutations, or transferred between bacteria via horizontal gene transfer. The development of antibiotic resistance poses significant challenges in treating bacterial infections and necessitates ongoing research to develop new therapeutic strategies.Intrinsic resistance occurs when bacterial...

Gene Regulation in Microbial Communities: Quorum Sensing

Gene Regulation in Microbial Communities: Quorum Sensing

Quorum sensing is a mechanism of bacterial communication that enables coordinated gene expression in response to changes in population density. This facilitates collective behaviors that enhance survival, resource acquisition, and ecological adaptation. This process relies on small signaling molecules called autoinducers that accumulate as bacterial populations grow. When a critical threshold concentration of autoinducers is reached, bacterial cells collectively modify gene expression,...

Antibiotic Selection

Antibiotic Selection