Suppr超能文献

耐头孢他啶/阿维巴坦治疗铜绿假单胞菌感染的 GES β-内酰胺酶的演变。

Evolution of GES β-Lactamases Driven by Ceftazidime/Avibactam Treatment of Pseudomonas aeruginosa Infections.

机构信息

Servicio de Microbiología and Unidad de Investigación, Hospital Universitario Son Espases, Instituto de Investigación Sanitaria Illes Balears (IdISBa), Palma de Mallorca, Spain.

Servicio de Microbiología, Hospital Universitario Central de Asturias, Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Oviedo, Spain.

出版信息

Antimicrob Agents Chemother. 2021 Aug 17;65(9):e0098621. doi: 10.1128/AAC.00986-21.

Abstract

The mechanisms underlying an switch in the resistance phenotype of P. aeruginosa after ceftazidime-avibactam treatment was investigated. The initial isolate (a blood culture) was resistant to meropenem but remained susceptible to antipseudomonal cephalosporins and combinations with β-lactamase inhibitors. One week after ceftazidime-avibactam therapy, a subsequent isolate (a rectal swab) recovered from the same patient showed the opposite phenotype. Whole-genome sequence analysis revealed a single SNP difference between both (ST235) isolates, leading to a P162S change in , creating . Thus, , , and were cloned and expressed in the wild-type strain PAO1. Susceptibility profiles confirmed the P162S substitution reverted the carbapenemase phenotype determined by the G170S change of GES-5 back into the ESBL phenotype of GES-1.

摘要

本研究旨在探究铜绿假单胞菌对头孢他啶-阿维巴坦耐药表型转变的机制。初始分离株(血培养)对美罗培南耐药,但对抗假单胞菌头孢菌素和β-内酰胺酶抑制剂复合制剂仍保持敏感。在头孢他啶-阿维巴坦治疗 1 周后,从同一患者中分离出的后续分离株(直肠拭子)表现出相反的表型。全基因组序列分析显示,两株(ST235)分离株之间仅有一个 SNP 差异,导致 中的 P162S 发生改变,形成 。因此,将 、 、 和 克隆并在野生型 PAO1 菌株中表达。药敏谱证实,P162S 取代使由 GES-5 的 G170S 变化决定的碳青霉烯酶表型恢复为 GES-1 的 ESBL 表型。

相似文献

1
Evolution of GES β-Lactamases Driven by Ceftazidime/Avibactam Treatment of Pseudomonas aeruginosa Infections.
Antimicrob Agents Chemother. 2021 Aug 17;65(9):e0098621. doi: 10.1128/AAC.00986-21.
5
Acquisition of Extended-Spectrum β-Lactamase GES-6 Leading to Resistance to Ceftolozane-Tazobactam Combination in .
Antimicrob Agents Chemother. 2018 Dec 21;63(1). doi: 10.1128/AAC.01809-18. Print 2019 Jan.

引用本文的文献

1
Spectrum of cefepime-taniborbactam coverage against 190 β-lactamases defined in engineered isogenic strains.
Antimicrob Agents Chemother. 2025 May 7;69(5):e0169924. doi: 10.1128/aac.01699-24. Epub 2025 Apr 1.
2
Mechanisms leading to ceftazidime/avibactam resistance development during treatment of GES-5-producing infections.
Antimicrob Agents Chemother. 2024 Nov 6;68(11):e0116424. doi: 10.1128/aac.01164-24. Epub 2024 Oct 21.
3
Not all carbapenem-resistant Pseudomonas aeruginosa strains are alike: tailoring antibiotic therapy based on resistance mechanisms.
Curr Opin Infect Dis. 2024 Dec 1;37(6):594-601. doi: 10.1097/QCO.0000000000001044. Epub 2024 Sep 18.
5
Genomic epidemiology and ceftazidime-avibactam high-level resistance mechanisms of in China from 2010 to 2022.
Emerg Microbes Infect. 2024 Dec;13(1):2324068. doi: 10.1080/22221751.2024.2324068. Epub 2024 Mar 11.
9
Role of Enzymatic Activity in the Biological Cost Associated with the Production of AmpC β-Lactamases in Pseudomonas aeruginosa.
Microbiol Spectr. 2022 Oct 26;10(5):e0270022. doi: 10.1128/spectrum.02700-22. Epub 2022 Oct 10.

本文引用的文献

1
New β-Lactam-β-Lactamase Inhibitor Combinations.
Clin Microbiol Rev. 2020 Nov 11;34(1). doi: 10.1128/CMR.00115-20. Print 2020 Dec 16.
3
Pseudomonas aeruginosa epidemic high-risk clones and their association with horizontally-acquired β-lactamases: 2020 update.
Int J Antimicrob Agents. 2020 Dec;56(6):106196. doi: 10.1016/j.ijantimicag.2020.106196. Epub 2020 Oct 9.
6
Epidemiology and Treatment of Multidrug-Resistant and Extensively Drug-Resistant Pseudomonas aeruginosa Infections.
Clin Microbiol Rev. 2019 Aug 28;32(4). doi: 10.1128/CMR.00031-19. Print 2019 Sep 18.
9
The Versatile Mutational Resistome of .
Front Microbiol. 2018 Apr 6;9:685. doi: 10.3389/fmicb.2018.00685. eCollection 2018.

文献AI研究员

20分钟写一篇综述,助力文献阅读效率提升50倍。

立即体验

用中文搜PubMed

大模型驱动的PubMed中文搜索引擎

马上搜索

文档翻译

学术文献翻译模型,支持多种主流文档格式。

立即体验