ArticleEuropean journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology2024
Reduced susceptibility to aztreonam-avibactam conferred by acquired AmpC-type β-lactamases in PBP3-modified Escherichia coli.
Article in European journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
15 citing papers in PubMed.
- In vitro activity of aztreonam/avibactam and comparators against Enterobacterales isolates from patients with hospital-acquired pneumonia, ventilator-associated pneumonia, and complicated intra-abdominal infections (ATLAS, 2021-2022).The Journal of antimicrobial chemotherapy · 2026Article
- Emergence of Klebsiella pneumoniae Carbapenemase-Producing K. pneumoniae with Penicillin-Binding Protein 3 Insertions, Taiwan, 2021.Emerging infectious diseases · 2026Review
- Case Commentary: When one target is not enough-PBP3 insertions and target redundancy inAntimicrobial agents and chemotherapy · 2026Article
- Clinical and genomic determinants associated with emergent ceftazidime-avibactam plus aztreonam non-susceptibility in ceftazidime-avibactam resistantAntimicrobial agents and chemotherapy · 2026Article
- Article
- Novel Insights into Carbapenem Resistance: Mechanisms, Diagnostics, and Future Directions.Antibiotics (Basel, Switzerland) · 2026Review
- Activity of novel antibiotics against dual metallo-Beta-lactamase producingJAC-antimicrobial resistance · 2026Article
- Activity of aztreonam-avibactam, cefiderocol, and cefepime-taniborbactam against a global collection of genetically characterized metallo-β-lactamase-producing Enterobacterales.Antimicrobial agents and chemotherapy · 2026Article
- Combined resistance mechanisms leading to high-level of cefiderocol resistance among NDM-like producing E. coli ST167 clinical isolates.European journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology · 2025Article
- Aztreonam/avibactam activity against Enterobacterales from European medical centres: summary of 5 years of surveillance prior to approval for clinical use (2019-2023).The Journal of antimicrobial chemotherapy · 2025Article
- Molecular resistance mechanisms to newly approved antibiotics (2017-2025) in WHO priority pathogens.Frontiers in microbiology · 2025Review
- Analysis of molecular mechanisms of delafloxacin resistance in Escherichia coli.Scientific reports · 2024Article
- Multicenter evaluation of activity of aztreonam in combination with avibactam, relebactam, and vaborbactam against metallo-β-lactamase-producing carbapenem-resistant gram-negative bacilli.Antimicrobial agents and chemotherapy · 2024Article
- Impact of extended-spectrum chromosomal AmpC (ESAC) ofMicrobiology spectrum · 2024Article
- Effect of modification of penicillin-binding protein 3 on susceptibility to ceftazidime-avibactam, imipenem-relebactam, meropenem-vaborbactam, aztreonam-avibactam, cefepime-taniborbactam, and cefiderocol ofAntimicrobial agents and chemotherapy · 2024Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
5 authors.
Funding
Abstract
purposeCarbapenemase-producing Enterobacterales are a growing threat, and very few therapeutic options remain active against those multidrug resistant bacteria. Aztreonam is the molecule of choice against metallo-beta-lactamases (MBL) producers since it is not hydrolyzed by those enzymes, but the co-production of acquired plasmidic cephalosporinases or extended-spectrum β-lactamases leading to aztreonam resistance may reduce the efficacy of this molecule. Hence, the development of the aztreonam-avibactam (AZA) combination provides an interesting therapeutic alternative since avibactam inhibits the activity of both cephalosporinases and extended-spectrum β-lactamases. However, structural modifications of penicillin binding protein PBP3, the target of aztreonam, may lead to reduced susceptibility to aztreonam-avibactam.
methodsHere the impact of various plasmid-encoded AmpC-type β-lactamases (ACC-1, ACT-7, ACT-17, CMY-2, CMY-42, DHA-1, FOX-1, and FOX-5) on susceptibility to aztreonam-avibactam was evaluated using isogenic E. coli MG1655 strains harboring insertions in PBP3 (YRIN and YRIK). The inhibitory activity of various β-lactamase inhibitors (clavulanic acid, tazobactam, avibactam, relebactam, and vaborbactam) were also compared against these enzymes.
resultsHence, we showed that reduced susceptibility to AZA was due to the combined effect of both AmpC production and amino acid insertions in PBP3. The highest resistance level was achieved in strains possessing the insertions in PBP3 in association with the production of ACT-7, ACC-1, or CMY-42.
conclusionAlthough none of the recombinant strains tested displayed clinical resistance to aztreonam-avibactam, our data emphasize that the occurrence of such profile might be of clinical relevance for MBL-producing strains.
Indexed as
Identifiers
38319508What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.