Biochemical Insights into Imipenem Collateral Susceptibility Driven by ampC Mutations Conferring Ceftolozane/Tazobactam Resistance in Pseudomonas aeruginosa.
Antimicrob Agents Chemother
; 67(2): e0140922, 2023 02 16.
Article
em En
| MEDLINE
| ID: mdl-36715512
ABSTRACT
Several Pseudomonas aeruginosa AmpC mutants have emerged that exhibit enhanced activity against ceftazidime and ceftolozane, while also evading inhibition by avibactam. Interestingly, P. aeruginosa strains harboring these AmpC mutations fortuitously exhibit enhanced carbapenem susceptibility. This acquired susceptibility was investigated by comparing the degradation of imipenem by wild-type and cephalosporin-resistant AmpC. We show that cephalosporin-resistant AmpC enzymes lose their efficacy for hydrolyzing imipenem and suggest that this may be due to their increased flexibility and dynamics relative to the wild type.
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Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Pseudomonas aeruginosa
/
Infecções por Pseudomonas
Limite:
Humans
Idioma:
En
Ano de publicação:
2023
Tipo de documento:
Article