Hydrolysis and Inhibition Profiles of β-Lactamases from Molecular Classes A to D with Doripenem, Imipenem, and Meropenem
2010
The stability of doripenem to hydrolysis by β-lactamases from molecular classes A to D was compared to the stability for imipenem and meropenem. Doripenem was stable to hydrolysis by extended-spectrum β-lactamases and AmpC type β-lactamases and demonstrated high affinity for the AmpC enzymes. For the serine carbapenemases SME-3 and KPC-2 and metallo-β-lactamases IMP-1 and VIM-2, doripenem hydrolysis was generally 2- to 150-fold slower than imipenem hydrolysis. SPM-1 hydrolyzed meropenem and doripenem fourfold faster than imipenem.
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