ArticleAntimicrobial agents and chemotherapy2010
Daptomycin-oxacillin combinations in treatment of experimental endocarditis caused by daptomycin-nonsusceptible strains of methicillin-resistant Staphylococcus aureus with evolving oxacillin susceptibility (the "seesaw effect").
Article in Antimicrobial agents and chemotherapy, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 75 papers.
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Who cites it
75 citing papers in PubMed, 129 citations in OpenAlex.
- Genomic investigation and clinical correlates of theAntimicrobial agents and chemotherapy · 2024Trial
- Daptomycin plus fosfomycin versus daptomycin monotherapy in treating MRSA: protocol of a multicentre, randomised, phase III trial.BMJ open · 2015Trial
- An Achilles' heel for methicillin-resistantAntimicrobial agents and chemotherapy · 2026Review
- Restoration of daptomycin sensitivity with adjunctive cefazolin is associated with C-terminal MprF mutations in MRSA bacteremia isolates.Antimicrobial agents and chemotherapy · 2026Article
- Genome-wide screen identifies novel factors for surface protein cross-wall trafficking and cell envelope homeostasis inJournal of bacteriology · 2026Article
- Impact on daptomycin resistance using combination of daptomycin plus ceftaroline in daptomycin-susceptible and -resistantFEMS microbes · 2026Article
- Expression ofmBio · 2025Article
- Genome-wide screen identifies novel factors for surface protein cross-wall trafficking and cell envelope homeostasis inbioRxiv : the preprint server for biology · 2025Article
- Use of Daptomycin to Manage Severe MRSA Infections in Humans.Antibiotics (Basel, Switzerland) · 2025Review
- Penicillin susceptibility amongMicrobiology spectrum · 2024Article
- Navigating collateral sensitivity: insights into the mechanisms and applications of antibiotic resistance trade-offs.Frontiers in microbiology · 2024Review
- Alteration ofMicrobiology spectrum · 2023Article
- Role of the NaHCOMicrobiology spectrum · 2023Article
- Impact of Bicarbonate on PBP2a Production, Maturation, and Functionality in Methicillin-ResistantAntimicrobial agents and chemotherapy · 2023Article
- Does a New Antibiotic Scheme Improve the Outcome ofAntibiotics (Basel, Switzerland) · 2022Article
- The Role ofAntimicrobial agents and chemotherapy · 2022Article
- Current Paradigms of Combination Therapy in Methicillin-Resistant Staphylococcus aureus (MRSA) Bacteremia: Does it Work, Which Combination, and For Which Patients?Clinical infectious diseases : an official publication of the Infectious Diseases Society of America · 2021Review
- Losing the Battle but Winning the War: Can Defeated Antibacterials Form Alliances to Combat Drug-Resistant Pathogens?Antibiotics (Basel, Switzerland) · 2021Review
- Cell Membrane Adaptations Mediate β-Lactam-Induced Resensitization of Daptomycin-Resistant (DAP-R)Microorganisms · 2021Article
- The Evolving Reduction of Vancomycin and Daptomycin Susceptibility in MRSA-Salvaging the Gold Standards with Combination Therapy.Antibiotics (Basel, Switzerland) · 2020Review
15 more citing papers are in PubMed but not listed here.
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Authors and funding
6 authors at 2 institutions in 1 country.
Funding
Abstract
In vivo development of daptomycin resistance (DAPr) among Staphylococcus aureus strains, especially methicillin-resistant S. aureus (MRSA) strains, in conjunction with clinical treatment failures, has emerged as a major problem. This has raised the question of DAP-based combination regimens to enhance efficacy against such strains. We studied five recent DAP-susceptible (DAPs)/DAPr clinical MRSA strain pairs obtained from patients who failed DAP monotherapy regimens, as well as one DAPs/DAPr MRSA strain pair in which the resistant strain was generated by in vitro passage in DAP. Of note, we identified a DAP-oxacillin (OX) "seesaw" phenomenon in vitro in which development of DAPr was accompanied by a concomitant fall in OX resistance, as demonstrated by 3- to 4-fold decreases in the OX MIC, a susceptibility shift by population analyses, and enhanced early killing by OX in time-kill assays. In addition, the combination of DAP and OX exerted modest improvement in in vitro bactericidal effects. Using an experimental model of infective endocarditis and two DAPs/DAPr strain pairs, we demonstrated that (i) OX monotherapy was ineffective at clearing DAPr strains from any target tissue in this model (heart valve, kidneys, or spleen) and (ii) DAP-OX combination therapy was highly effective in DAPr strain clearances from these organs. The mechanism(s) of the seesaw effect remains to be defined but does not appear to involve excision of the staphylococcal cassette chromosome mec (SCCmec) that carries mecA.
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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.