2024
Synergistic effects of sulopenem in combination with cefuroxime or durlobactam against Mycobacterium abscessus
Dousa K, Shin E, Kurz S, Plummer M, Nantongo M, Bethel C, Taracila M, Nguyen D, Kreiswith B, Daley C, Remy K, Holland S, Bonomo R. Synergistic effects of sulopenem in combination with cefuroxime or durlobactam against Mycobacterium abscessus. MBio 2024, 15: e00609-24. PMID: 38742824, PMCID: PMC11237399, DOI: 10.1128/mbio.00609-24.Peer-Reviewed Original ResearchConceptsD,D-carboxypeptidaseMinimum inhibitory concentrationB-lactamPenicillin-binding-proteinCell wall synthesisL,D-transpeptidasesResistance to common antibioticsLowest minimum inhibitory concentrationWall synthesisCystic fibrosisD-carboxypeptidaseMass spectrometry analysisB-lactamaseThioester bondRate of treatment failureCell-based assaysMultiple antibioticsB-lactam ringsCommon antibioticsD-transpeptidasesB-lactamase inhibitorsCysteine residuesTime-kill studiesStructural lung diseaseMultidrug-resistant tuberculosis
2020
Insights into the l,d-Transpeptidases and d,d-Carboxypeptidase of Mycobacterium abscessus: Ceftaroline, Imipenem, and Novel Diazabicyclooctane Inhibitors
Dousa K, Kurz S, Taracila M, Bonfield T, Bethel C, Barnes M, Selvaraju S, Abdelhamed A, Kreiswirth B, Boom W, Kasperbauer S, Daley C, Bonomo R. Insights into the l,d-Transpeptidases and d,d-Carboxypeptidase of Mycobacterium abscessus: Ceftaroline, Imipenem, and Novel Diazabicyclooctane Inhibitors. Antimicrobial Agents And Chemotherapy 2020, 64: 10.1128/aac.00098-20. PMID: 32393499, PMCID: PMC7526840, DOI: 10.1128/aac.00098-20.Peer-Reviewed Original ResearchConceptsCeftaroline fosamilB-lactamB-lactamaseNontuberculous mycobacteriaB-lactamase inhibitorsD-carboxypeptidaseB-lactam antibioticsCell wall synthesis proteinsCeftarolineImipenemDiazabicyclooctane inhibitorSteady-state kinetic assaysAvibactamHighest acylation ratesMechanism-based approachGt;100-foldRelebactamSynthesis proteinsD-transpeptidasesKinetic assaysAcylation rateInhibitors
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