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Heo HY, Zou G, Baek S, Kim J, Mylonakis E, Ausubel FM, Gao H, Kim W. A Methylazanediyl Bisacetamide Derivative Sensitizes Staphylococcus aureus Persisters to a Combination of Gentamicin And Daptomycin. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2306112. [PMID: 38126676 PMCID: PMC10916567 DOI: 10.1002/advs.202306112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2023] [Revised: 12/01/2023] [Indexed: 12/23/2023]
Abstract
Infections caused by Staphylococcus aureus, notably methicillin-resistant S. aureus (MRSA), pose treatment challenges due to its ability to tolerate antibiotics and develop antibiotic resistance. The former, a mechanism independent of genetic changes, allows bacteria to withstand antibiotics by altering metabolic processes. Here, a potent methylazanediyl bisacetamide derivative, MB6, is described, which selectively targets MRSA membranes over mammalian membranes without observable resistance development. Although MB6 is effective against growing MRSA cells, its antimicrobial activity against MRSA persisters is limited. Nevertheless, MB6 significantly potentiates the bactericidal activity of gentamicin against MRSA persisters by facilitating gentamicin uptake. In addition, MB6 in combination with daptomycin exhibits enhanced anti-persister activity through mutual reinforcement of their membrane-disrupting activities. Crucially, the "triple" combination of MB6, gentamicin, and daptomycin exhibits a marked enhancement in the killing of MRSA persisters compared to individual components or any double combinations. These findings underscore the potential of MB6 to function as a potent and selective membrane-active antimicrobial adjuvant to enhance the efficacy of existing antibiotics against persister cells. The molecular mechanisms of MB6 elucidated in this study provide valuable insights for designing anti-persister adjuvants and for developing new antimicrobial combination strategies to overcome the current limitations of antibiotic treatments.
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Affiliation(s)
- Hee Young Heo
- College of PharmacyGraduate School of Pharmaceutical SciencesEwha Womans UniversitySeoul03760Republic of Korea
| | - Guijin Zou
- Institute of High Performance Computing (IHPC)Agency for ScienceTechnology and Research (A*STAR)Singapore138632Republic of Singapore
| | - Seongeun Baek
- College of PharmacyGraduate School of Pharmaceutical SciencesEwha Womans UniversitySeoul03760Republic of Korea
| | - Jae‐Seok Kim
- Department of Laboratory MedicineKangdong Sacred Heart HospitalHallym University College of MedicineSeoul05355Republic of Korea
| | | | - Frederick M. Ausubel
- Department of Molecular BiologyMassachusetts General HospitalBostonMA02114USA
- Department of GeneticsHarvard Medical SchoolBostonMA02115USA
| | - Huajian Gao
- Institute of High Performance Computing (IHPC)Agency for ScienceTechnology and Research (A*STAR)Singapore138632Republic of Singapore
- School of Mechanical and Aerospace EngineeringCollege of EngineeringNanyang Technological UniversitySingapore639789Republic of Singapore
| | - Wooseong Kim
- College of PharmacyGraduate School of Pharmaceutical SciencesEwha Womans UniversitySeoul03760Republic of Korea
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2
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Kano T, Ishikawa K, Furuta K, Kaito C. Knockout of adenylosuccinate synthase purA increases susceptibility to colistin in Escherichia coli. FEMS Microbiol Lett 2024; 371:fnae007. [PMID: 38305138 PMCID: PMC10876104 DOI: 10.1093/femsle/fnae007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 01/19/2024] [Accepted: 01/31/2024] [Indexed: 02/03/2024] Open
Abstract
Colistin is a cationic cyclic antimicrobial peptide used as a last resort against multidrug-resistant gram-negative bacteria. To understand the factors involved in colistin susceptibility, we screened colistin-sensitive mutants from an E. coli gene-knockout library (Keio collection). The knockout of purA, whose product catalyzes the synthesis of adenylosuccinate from IMP in the de novo purine synthesis pathway, resulted in increased sensitivity to colistin. Adenylosuccinate is subsequently converted to AMP, which is phosphorylated to produce ADP, a substrate for ATP synthesis. The amount of ATP was lower in the purA-knockout mutant than that in the wild-type strain. ATP synthesis is coupled with proton transfer, and it contributes to the membrane potential. Using the membrane potential probe, 3,3'-diethyloxacarbocyanine iodide [DiOC2(3)], we found that the membrane was hyperpolarized in the purA-knockout mutant compared to that in the wild-type strain. Treatment with the proton uncoupler, carbonyl cyanide m-chlorophenyl hydrazone (CCCP), abolished the hyperpolarization and colistin sensitivity in the mutant. The purA-knockout mutant exhibited increased sensitivity to aminoglycosides, kanamycin, and gentamicin; their uptake requires a membrane potential. Therefore, the knockout of purA, an adenylosuccinate synthase, decreases ATP synthesis concurrently with membrane hyperpolarization, resulting in increased sensitivity to colistin.
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Affiliation(s)
- Tomonori Kano
- Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama University, 1-1-1 Tsushima-naka, Kita-ku, Okayama 700–8530, Japan
| | - Kazuya Ishikawa
- Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama University, 1-1-1 Tsushima-naka, Kita-ku, Okayama 700–8530, Japan
| | - Kazuyuki Furuta
- Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama University, 1-1-1 Tsushima-naka, Kita-ku, Okayama 700–8530, Japan
| | - Chikara Kaito
- Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama University, 1-1-1 Tsushima-naka, Kita-ku, Okayama 700–8530, Japan
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3
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Oliva A, Cogliati Dezza F, Cancelli F, Curtolo A, Falletta A, Volpicelli L, Venditti M. New Antimicrobials and New Therapy Strategies for Endocarditis: Weapons That Should Be Defended. J Clin Med 2023; 12:7693. [PMID: 38137762 PMCID: PMC10743892 DOI: 10.3390/jcm12247693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Revised: 11/22/2023] [Accepted: 11/30/2023] [Indexed: 12/24/2023] Open
Abstract
The overall low-quality evidence concerning the clinical benefits of different antibiotic regimens for the treatment of infective endocarditis (IE), which has made it difficult to strongly support or reject any regimen of antibiotic therapy, has led to a discrepancy between the available guidelines and clinical practice. In this complex scenario, very recently published guidelines have attempted to fill this gap. Indeed, in recent years several antimicrobials have entered the market, including ceftobiprole, ceftaroline, and the long-acting lipoglycopeptides dalbavancin and oritavancin. Despite being approved for different indications, real-world data on their use for the treatment of IE, alone or in combination, has accumulated over time. Furthermore, an old antibiotic, fosfomycin, has gained renewed interest for the treatment of complicated infections such as IE. In this narrative review, we focused on new antimicrobials and therapeutic strategies that we believe may provide important contributions to the advancement of Gram-positive IE treatment, providing a summary of the current in vitro, in vivo, and clinical evidence supporting their use in clinical practice.
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Affiliation(s)
- Alessandra Oliva
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, 00185 Rome, Italy; (F.C.D.); (F.C.); (A.C.); (A.F.); (L.V.); (M.V.)
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García de la Mària C, Cañas MA, Fernández-Pittol M, Dahl A, García-González J, Hernández-Meneses M, Cuervo G, Moreno A, Miró JM, Marco F. Emerging issues on Staphylococcus aureus endocarditis and the role in therapy of daptomycin plus fosfomycin. Expert Rev Anti Infect Ther 2023; 21:281-293. [PMID: 36744387 DOI: 10.1080/14787210.2023.2174969] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
INTRODUCTION Methicillin-resistant and -susceptible Staphylococcus aureus (MRSA/MSSA) infections are a major global health-care problem. Bacteremia with S. aureus exhibits high rates of morbidity and mortality and can cause complicated infections such as infective endocarditis (IE). The emerging resistance profile of S. aureus is worrisome, and several international agencies have appealed for new treatment approaches to be developed. AREAS COVERED Daptomycin presents a rapid bactericidal effect against MRSA and has been considered at least as effective as vancomycin in treating MRSA bacteremia. However, therapy failure is often related to deep-seated infections, e.g. endocarditis, with high bacterial inocula and daptomycin regimens <10 mg/kg/day. Current antibiotic options for treating invasive S. aureus infections have limitations in monotherapy. Daptomycin in combination with other antibiotics, e.g. fosfomycin, may be effective in improving clinical outcomes in patients with MRSA IE. EXPERT OPINION Exploring therapeutic combinations has shown fosfomycin to have a unique mechanism of action and to be the most effective option in preventing the onset of resistance to and optimizing the efficacy of daptomycin, suggesting the synergistic combination of fosfomycin with daptomycin is a useful alternative treatment option for MSSA or MRSA IE.
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Affiliation(s)
- Cristina García de la Mària
- Infectious Diseases Service, Hospital Clinic - Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS). University of Barcelona, Barcelona, Spain
| | - Maria-Alexandra Cañas
- Infectious Diseases Service, Hospital Clinic - Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS). University of Barcelona, Barcelona, Spain
| | | | - Anders Dahl
- Infectious Diseases Service, Hospital Clinic - Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS). University of Barcelona, Barcelona, Spain.,Department of Cardiology, Bispebjerg University Hospital, Copenhagen, Denmark
| | - Javier García-González
- Infectious Diseases Service, Hospital Clinic - Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS). University of Barcelona, Barcelona, Spain
| | - Marta Hernández-Meneses
- Infectious Diseases Service, Hospital Clinic - Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS). University of Barcelona, Barcelona, Spain
| | - Guillermo Cuervo
- Infectious Diseases Service, Hospital Clinic - Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS). University of Barcelona, Barcelona, Spain
| | - Asunción Moreno
- Infectious Diseases Service, Hospital Clinic - Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS). University of Barcelona, Barcelona, Spain
| | - Jose M Miró
- Infectious Diseases Service, Hospital Clinic - Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS). University of Barcelona, Barcelona, Spain.,CIBERINFEC, Instituto de Salud Carlos III, Madrid, Spain
| | - Francesc Marco
- Microbiology Department, Centre Diagnòstic Biomèdic (CDB) Hospital Clínic, Barcelona, Spain.,ISGlobal, Hospital Clínic - Universitat de Barcelona, Barcelona, Spain
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Sulaiman JE, Long L, Qian PY, Lam H. Proteome profiling of evolved methicillin-resistant Staphylococcus aureus strains with distinct daptomycin tolerance and resistance phenotypes. Front Microbiol 2022; 13:970146. [PMID: 35992709 PMCID: PMC9386379 DOI: 10.3389/fmicb.2022.970146] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Accepted: 07/13/2022] [Indexed: 12/04/2022] Open
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) is a highly dangerous pathogen, and daptomycin has been increasingly used to treat its infections in clinics. Recently, several groups have shown that tolerance and resistance of microbes can evolve rapidly under cyclic antibiotic exposure. We have previously shown that the same tolerance and resistance development occurs in MRSA treated with daptomycin in an adaptive laboratory evolution (ALE) experiment. In the present study, we performed proteomic analysis to compare six daptomycin-tolerant and resistant MRSA strains that were evolved from the same ancestral strain. The strain with a higher tolerance level than the others had the most different proteome and response to antibiotic treatment, resembling those observed in persister cells, which are small subpopulations of bacteria that survive lethal antibiotics treatment. By comparing the proteome changes across strains with similar phenotypes, we identified the key proteins that play important roles in daptomycin tolerance and resistance in MRSA. We selected two candidates to be confirmed by gene overexpression analysis. Overexpression of EcsA1 and FabG, which were up-regulated in all of the tolerant evolved strains, led to increased daptomycin tolerance in wild-type MRSA. The proteomics data also suggested that cell wall modulations were implicated in both resistance and tolerance, but in different ways. While the resistant strains had peptidoglycan changes and a more positive surface charge to directly repel daptomycin, the tolerant strains possessed different cell wall changes that do not involve the peptidoglycan nor alterations of the surface charge. Overall, our study showed the differential proteome profiles among multiple tolerant and resistant strains, pinpointed the key proteins for the two phenotypes and revealed the differences in cell wall modulations between the daptomycin-tolerant/resistant strains.
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Affiliation(s)
- Jordy Evan Sulaiman
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Kowloon, Hong Kong SAR, China
| | - Lexin Long
- Department of Ocean Science and Hong Kong Branch of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), The Hong Kong University of Science and Technology, Kowloon, Hong Kong SAR, China
| | - Pei-Yuan Qian
- Department of Ocean Science and Hong Kong Branch of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), The Hong Kong University of Science and Technology, Kowloon, Hong Kong SAR, China
- Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou, China
| | - Henry Lam
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Kowloon, Hong Kong SAR, China
- *Correspondence: Henry Lam,
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García-de-la-Mària C, Gasch O, Castañeda X, García-González J, Soy D, Cañas MA, Ambrosioni J, Almela M, Pericàs JM, Téllez A, Falces C, Hernández-Meneses M, Sandoval E, Quintana E, Vidal B, Tolosana JM, Fuster D, Llopis J, Moreno A, Marco F, Miró JM. Cloxacillin or fosfomycin plus daptomycin combinations are more active than cloxacillin monotherapy or combined with gentamicin against MSSA in a rabbit model of experimental endocarditis. J Antimicrob Chemother 2021; 75:3586-3592. [PMID: 32853336 DOI: 10.1093/jac/dkaa354] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2019] [Accepted: 07/16/2020] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND In vitro and in vivo activity of daptomycin alone or plus either cloxacillin or fosfomycin compared with cloxacillin alone and cloxacillin plus gentamicin were evaluated in a rabbit model of MSSA experimental endocarditis (EE). METHODS Five MSSA strains were used in the in vitro time-kill studies at standard (105-106 cfu/mL) and high (108 cfu/mL) inocula. In the in vivo EE model, the following antibiotic combinations were evaluated: cloxacillin (2 g/4 h) alone or combined with gentamicin (1 mg/kg/8 h) or daptomycin (6 mg/kg once daily); and daptomycin (6 mg/kg/day) alone or combined with fosfomycin (2 g/6 h). RESULTS At standard and high inocula, daptomycin plus fosfomycin or cloxacillin were bactericidal against 4/5 and 5/5 strains, respectively, while cloxacillin plus gentamicin was bactericidal against 3/5 strains at standard inocula but against none at high inocula. Fosfomycin, cloxacillin, gentamicin and daptomycin MIC/MBCs of the MSSA-678 strain used in the EE model were: 8/64, 0.25/0.5, 0.25/0.5 and 1/8 mg/L, respectively. Adding gentamicin to cloxacillin significantly reduced bacterial density in vegetations compared with cloxacillin monotherapy (P = 0.026). Adding fosfomycin or cloxacillin to daptomycin [10/11 (93%) and 8/11 (73%), respectively] significantly improved the efficacy of daptomycin in sterilizing vegetations [0/11 (0%), P < 0.001 for both combinations] and showed better activity than cloxacillin alone [0/10 (0%), P < 0.001 for both combinations] and cloxacillin plus gentamicin [3/10 (30%), P = 0.086 for cloxacillin plus daptomycin and P = 0.008 for fosfomycin plus daptomycin]. No recovered isolates showed increased daptomycin MIC. CONCLUSIONS The addition of cloxacillin or fosfomycin to daptomycin is synergistic and rapidly bactericidal, showing better activity than cloxacillin plus gentamicin for treating MSSA EE, supporting their clinical use.
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Affiliation(s)
- Cristina García-de-la-Mària
- Hospital Clínic - Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
| | - Oriol Gasch
- Hospital Parc Tauli de Sabadell, University Autònoma of Barcelona, Spain
| | - Ximena Castañeda
- Hospital Clínic - Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
| | - Javier García-González
- Hospital Clínic - Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
| | - Dolors Soy
- Hospital Clínic - Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
| | - Maria-Alexandra Cañas
- Hospital Clínic - Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
| | - Juan Ambrosioni
- Hospital Clínic - Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
| | - Manel Almela
- Microbiology Department, Centre Diagnòstic Biomèdic, Hospital Clínic, Barcelona, Spain
| | - Juan M Pericàs
- Hospital Clínic - Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
| | - Adrián Téllez
- Hospital Clínic - Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
| | - Carlos Falces
- Hospital Clínic - Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
| | - Marta Hernández-Meneses
- Hospital Clínic - Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
| | - Elena Sandoval
- Hospital Clínic - Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
| | - Eduard Quintana
- Hospital Clínic - Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
| | - Barbara Vidal
- Hospital Clínic - Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
| | - Jose M Tolosana
- Hospital Clínic - Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
| | - David Fuster
- Hospital Clínic - Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
| | - Jaume Llopis
- Department of Statistics, Faculty of Biology, University of Barcelona, Spain
| | - Asuncion Moreno
- Hospital Clínic - Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
| | - Francesc Marco
- Microbiology Department, Centre Diagnòstic Biomèdic, Hospital Clínic, Barcelona, Spain.,ISGlobal, Hospital Clínic-Universitat de Barcelona, Barcelona, Spain
| | - Jose M Miró
- Hospital Clínic - Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
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7
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Pujol M, Miró JM, Shaw E, Aguado JM, San-Juan R, Puig-Asensio M, Pigrau C, Calbo E, Montejo M, Rodriguez-Álvarez R, Garcia-Pais MJ, Pintado V, Escudero-Sánchez R, Lopez-Contreras J, Morata L, Montero M, Andrés M, Pasquau J, Arenas MDM, Padilla B, Murillas J, Jover-Sáenz A, López-Cortes LE, García-Pardo G, Gasch O, Videla S, Hereu P, Tebé C, Pallarès N, Sanllorente M, Domínguez MÁ, Càmara J, Ferrer A, Padullés A, Cuervo G, Carratalà J. Daptomycin Plus Fosfomycin Versus Daptomycin Alone for Methicillin-resistant Staphylococcus aureus Bacteremia and Endocarditis: A Randomized Clinical Trial. Clin Infect Dis 2021; 72:1517-1525. [PMID: 32725216 PMCID: PMC8096235 DOI: 10.1093/cid/ciaa1081] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Accepted: 07/27/2020] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND We aimed to determine whether daptomycin plus fosfomycin provides higher treatment success than daptomycin alone for methicillin-resistant Staphylococcus aureus (MRSA) bacteremia and endocarditis. METHODS A randomized (1:1) phase 3 superiority, open-label, and parallel group clinical trial of adult inpatients with MRSA bacteremia was conducted at 18 Spanish hospitals. Patients were randomly assigned to receive either 10 mg/kg of daptomycin intravenously daily plus 2 g of fosfomycin intravenously every 6 hours, or 10 mg/kg of daptomycin intravenously daily. Primary endpoint was treatment success 6 weeks after the end of therapy. RESULTS Of 167 patients randomized, 155 completed the trial and were assessed for the primary endpoint. Treatment success at 6 weeks after the end of therapy was achieved in 40 of 74 patients who received daptomycin plus fosfomycin and in 34 of 81 patients who were given daptomycin alone (54.1% vs 42.0%; relative risk, 1.29 [95% confidence interval, .93-1.8]; P = .135). At 6 weeks, daptomycin plus fosfomycin was associated with lower microbiologic failure (0 vs 9 patients; P = .003) and lower complicated bacteremia (16.2% vs 32.1%; P = .022). Adverse events leading to treatment discontinuation occurred in 13 of 74 patients (17.6%) receiving daptomycin plus fosfomycin, and in 4 of 81 patients (4.9%) receiving daptomycin alone (P = .018). CONCLUSIONS Daptomycin plus fosfomycin provided 12% higher rate of treatment success than daptomycin alone, but this difference did not reach statistical significance. This antibiotic combination prevented microbiological failure and complicated bacteremia, but it was more often associated with adverse events. CLINICAL TRIALS REGISTRATION NCT01898338.
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Affiliation(s)
- Miquel Pujol
- Department of Infectious Diseases, Hospital Universitari de Bellvitge, Institut Investigacions Biomèdiques de Bellvitge, University of Barcelona, Barcelona, Spain
| | - José-María Miró
- Department of Infectious Diseases, Hospital Clinic, Institut d’Investigacions Biomèdiques Agust Pi i Sunyer, University of Barcelona, Barcelona, Spain
| | - Evelyn Shaw
- Department of Infectious Diseases, Hospital Universitari de Bellvitge, Institut Investigacions Biomèdiques de Bellvitge, University of Barcelona, Barcelona, Spain
| | - Jose-María Aguado
- Department of Infectious Diseases, Hospital Universitario 12 Octubre, Instituto de Investigación Hospital 12 de Octubre, Universidad Complutense, Madrid, Spain
| | - Rafael San-Juan
- Department of Infectious Diseases, Hospital Universitario 12 Octubre, Instituto de Investigación Hospital 12 de Octubre, Universidad Complutense, Madrid, Spain
| | - Mireia Puig-Asensio
- Department of Infectious Diseases, Hospital Vall d’Hebron, Vall d’Hebron Institut de Recerca, Barcelona, Spain
| | - Carles Pigrau
- Department of Infectious Diseases, Hospital Vall d’Hebron, Vall d’Hebron Institut de Recerca, Barcelona, Spain
| | - Esther Calbo
- Infectious Diseases Unit, Hospital Universitari Mútua de Terrassa, Fundació Docència i Recerca Mútua de Terrassa, Universitat Internacional de Catalunya, Barcelona, Spain
| | - Miguel Montejo
- Department of Infectious Diseases, Hospital Universitario Cruces, Biocruces Bizkaia, Bilbao, Spain
| | - Regino Rodriguez-Álvarez
- Department of Infectious Diseases, Hospital Universitario Cruces, Biocruces Bizkaia, Bilbao, Spain
| | - María-Jose Garcia-Pais
- Infectious Diseases Unit, Hospital Lucus Augusti, Instituto de Investigación Sanitaria de Santiago de Compostela, Lugo, Spain
| | - Vicente Pintado
- Department of Infectious Diseases, Hospital Universitario Ramon y Cajal, Instituto Ramon y Cajal de Investigación Sanitaria, Madrid, Spain
| | - Rosa Escudero-Sánchez
- Department of Infectious Diseases, Hospital Universitario Ramon y Cajal, Instituto Ramon y Cajal de Investigación Sanitaria, Madrid, Spain
| | - Joaquín Lopez-Contreras
- Department of Infectious Diseases, Hospital Universitari de Sant Pau, Institut d’Investigació Biomèdica de Sant Pau, Barcelona, Spain
| | - Laura Morata
- Department of Infectious Diseases, Hospital Clinic, Institut d’Investigacions Biomèdiques Agust Pi i Sunyer, University of Barcelona, Barcelona, Spain
| | - Milagros Montero
- Department of Infectious Diseases, Hospital del Mar, Institut de Recerca Hospital del Mar, Barcelona, Spain
| | - Marta Andrés
- Infectious Disease Unit, Consorci Sanitari de Terrassa, Terrassa, Spain
| | - Juan Pasquau
- Department of Infectious Diseases, Hospital Universitario Virgen de las Nieves, Instituto de Investigación Sanitaria Granada, Granada, Spain
| | - María-del-Mar Arenas
- Department of Infectious Diseases, Hospital Universitario Virgen de las Nieves, Instituto de Investigación Sanitaria Granada, Granada, Spain
| | - Belén Padilla
- Department of Clinical Microbiology and Infectious Diseases, Hospital Universitario Gregorio Marañón, Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain
| | - Javier Murillas
- Department of Internal Medicine, Hospital Universitari Son Espases, Fundació Institut d’Investigació Sanitària Illes Balears, Mallorca, Spain
| | - Alfredo Jover-Sáenz
- Territorial Unit of Nosocomial Infection, Hospital Universitari Arnau de Vilanova, Institut de Recerca Biomèdica de Lleida, Lleida, Spain
| | - Luis-Eduardo López-Cortes
- Department of Infectious Diseases, Hospital Universitario Virgen Macarena, Instituto de Biomedicina de Sevilla, Sevilla, Spain
| | - Graciano García-Pardo
- Department of Internal Medicine, Hospital Universitari Joan XXIII, Universitat Rovira i Virgili, Tarragona, Spain
| | - Oriol Gasch
- Department of Infectious Diseases, Consorci Sanitari Hospital Parc Taulí, Fundació Institut d’Investigació i Innovació Parc Taulí, Sabadell, Spain
| | - Sebastian Videla
- Department of Clinical Pharmacology, Institut Investigacions Biomèdiques de Bellvitge, Clinical Research and Clinical Trials Unit, Plataforma Spanish Clinical Research Network, Barcelona, Spain
| | - Pilar Hereu
- Department of Clinical Pharmacology, Institut Investigacions Biomèdiques de Bellvitge, Clinical Research and Clinical Trials Unit, Plataforma Spanish Clinical Research Network, Barcelona, Spain
| | - Cristian Tebé
- Biostatistics Unit, Institut Investigacions Biomèdiques de Bellvitge, L’Hospitalet Llobregat, L’Hospitalet del Llobregat, Spain
| | - Natalia Pallarès
- Biostatistics Unit, Institut Investigacions Biomèdiques de Bellvitge, L’Hospitalet Llobregat, L’Hospitalet del Llobregat, Spain
| | - Mireia Sanllorente
- Department of Clinical Pharmacology, Institut Investigacions Biomèdiques de Bellvitge, Clinical Research and Clinical Trials Unit, Plataforma Spanish Clinical Research Network, Barcelona, Spain
| | - María-Ángeles Domínguez
- Department of Microbiology and Parasitology, Hospital Universitari de Bellvitge, Institut Investigacions Biomèdiques de Bellvitge, University of Barcelona, Barcelona, Spain
| | - Jordi Càmara
- Department of Microbiology and Parasitology, Hospital Universitari de Bellvitge, Institut Investigacions Biomèdiques de Bellvitge, University of Barcelona, Barcelona, Spain
| | - Anna Ferrer
- Department of Pharmacy, Hospital Universitari de Bellvitge, Institut Investigacions Biomèdiques de Bellvitge, University of Barcelona, Barcelona, Spain
| | - Ariadna Padullés
- Department of Pharmacy, Hospital Universitari de Bellvitge, Institut Investigacions Biomèdiques de Bellvitge, University of Barcelona, Barcelona, Spain
| | - Guillermo Cuervo
- Department of Infectious Diseases, Hospital Universitari de Bellvitge, Institut Investigacions Biomèdiques de Bellvitge, University of Barcelona, Barcelona, Spain
| | - Jordi Carratalà
- Department of Infectious Diseases, Hospital Universitari de Bellvitge, Institut Investigacions Biomèdiques de Bellvitge, University of Barcelona, Barcelona, Spain
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8
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Sabat AJ, Tinelli M, Grundmann H, Akkerboom V, Monaco M, Del Grosso M, Errico G, Pantosti A, Friedrich AW. Daptomycin Resistant Staphylococcus aureus Clinical Strain With Novel Non-synonymous Mutations in the mprF and vraS Genes: A New Insight Into Daptomycin Resistance. Front Microbiol 2018; 9:2705. [PMID: 30459746 PMCID: PMC6232378 DOI: 10.3389/fmicb.2018.02705] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Accepted: 10/23/2018] [Indexed: 11/25/2022] Open
Abstract
Objectives: Daptomycin (DAP) resistance in Staphylococcus aureus is uncommon but there are increasing reports of the emergence of resistance during DAP therapy. Most clinical DAP-resistant S. aureus isolates investigated carried mutations in the mprF gene. The aim of this study was to identify mutations between a clinical pair of methicillin-susceptible S. aureus (MSSA) isolates (DAP-susceptible and DAP-resistant). Additionally, the activity of genes previously associated with DAP resistance was assessed. Materials and Methods: Two MSSA isolates from patient with left-sided endocarditis were analyzed by whole genome sequencing (WGS) and reverse transcription-quantitative real-time PCR (RT-qPCR). The first isolate, DAP-susceptible, was obtained before initiation of treatment and the second isolate, DAP-resistant, was recovered after 4 weeks of DAP therapy. Results: Comparison of complete genomes of DAP-susceptible and its DAP-resistant variant identified two non-synonymous and one synonymous mutations. The non-synonymous mutations consisted of a S829L substitution in mprF and a T331I substitution in vraS. The RT-qPCR experiments revealed an increased expression of vraS, dltA, mprF, and sceD genes in DAP-resistant variant. Strikingly, the expression of dltA and mprF genes was significantly downregulated by DAP. Conclusion: The mprF and vraS genes were previously associated with DAP resistance, however, none of the mutations described in this study had been previously identified and linked to DAP resistance. Moreover, we provide a new insight into the DAP action on S. aureus, in which the expression of key genes in DAP resistance is decreased by the antibiotic.
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Affiliation(s)
- Artur J Sabat
- Department of Medical Microbiology, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
| | - Marco Tinelli
- Division of Infectious and Tropical Diseases, Hospital of Lodi, Lodi, Italy
| | - Hajo Grundmann
- Department of Medical Microbiology, University Medical Center Groningen, University of Groningen, Groningen, Netherlands.,Institute for Infection Prevention and Hospital Epidemiology, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Viktoria Akkerboom
- Department of Medical Microbiology, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
| | - Monica Monaco
- Department of Infectious Diseases, Istituto Superiore di Sanità, Rome, Italy
| | - Maria Del Grosso
- Department of Infectious Diseases, Istituto Superiore di Sanità, Rome, Italy
| | - Giulia Errico
- Department of Infectious Diseases, Istituto Superiore di Sanità, Rome, Italy
| | - Annalisa Pantosti
- Department of Infectious Diseases, Istituto Superiore di Sanità, Rome, Italy
| | - Alexander W Friedrich
- Department of Medical Microbiology, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
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9
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The Combination of Daptomycin and Fosfomycin Has Synergistic, Potent, and Rapid Bactericidal Activity against Methicillin-Resistant Staphylococcus aureus in a Rabbit Model of Experimental Endocarditis. Antimicrob Agents Chemother 2018; 62:AAC.02633-17. [PMID: 29610194 DOI: 10.1128/aac.02633-17] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Accepted: 03/26/2018] [Indexed: 11/20/2022] Open
Abstract
We investigated whether the addition of fosfomycin or cloxacillin to daptomycin provides better outcomes in the treatment of methicillin-resistant Staphylococcus aureus (MRSA) experimental aortic endocarditis in rabbits. Five MRSA strains were used to perform in vitro time-kill studies using standard (106) and high (108) inocula. Combined therapy was compared to daptomycin monotherapy treatment in the MRSA experimental endocarditis model. A human-like pharmacokinetics model was applied, and the equivalents of cloxacillin at 2 g/4 h, fosfomycin at 2 g/6 h, and daptomycin at 6 to 10 mg/kg/day were administered intravenously. A combination of daptomycin and either fosfomycin or cloxacillin was synergistic in the five strains tested at both inocula. A bactericidal effect was detected in four of five strains tested with both combinations. The MRSA-277 strain (vancomycin MIC, 2 μg/ml) was used for the experimental endocarditis model. Daptomycin plus fosfomycin significantly improved the efficacy of daptomycin monotherapy at 6 mg/kg/day in terms of both the proportion of sterile vegetations (100% versus 72%, P = 0.046) and the decrease in the density of bacteria within the vegetations (P = 0.025). Daptomycin plus fosfomycin was as effective as daptomycin monotherapy at 10 mg/kg/day (100% versus 93%, P = 1.00) and had activity similar to that of daptomycin plus cloxacillin when daptomycin was administered at 6 mg/kg/day (100% versus 88%, P = 0.48). Daptomycin nonsusceptibility was not detected in any of the isolates recovered from vegetations. In conclusion, for the treatment of MRSA experimental endocarditis, the combination of daptomycin plus fosfomycin showed synergistic and bactericidal activity.
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10
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Tabuchi F, Matsumoto Y, Ishii M, Tatsuno K, Okazaki M, Sato T, Moriya K, Sekimizu K. D-cycloserine increases the effectiveness of vancomycin against vancomycin-highly resistant Staphylococcus aureus. J Antibiot (Tokyo) 2017; 70:907-910. [PMID: 28588223 DOI: 10.1038/ja.2017.56] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Revised: 04/10/2017] [Accepted: 04/11/2017] [Indexed: 01/07/2023]
Abstract
Vancomycin is a widely used clinical drug to treat for infection by methicillin-resistant Staphylococcus aureus. Some patients show a weak response to vancomycin treatment. We previously reported that β-lactams increase the susceptibility to vancomycin by vancomycin-highly resistant S. aureus (VRSA) strains obtained following repeated in vitro mutagenesis and vancomycin selection. Here we found that the susceptibility of the VRSA strains to vancomycin was remarkably increased by combined treatment with D-cycloserine. On the other hand, VRSA did not show increased susceptibility to vancomycin in combination with bacitracin, fosfomycin, erythromycin, lincomycin, gentamicin, levofloxacin or nisin. Furthermore, in an in vivo infection model with silkworms, combined treatment with vancomycin and D-cycloserine exhibited therapeutic effects, whereas treatment with each compound alone did not. These findings suggest that combined treatment with vancomycin and D-cycloserine could be therapeutically effective against infectious diseases caused by VRSA.
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Affiliation(s)
- Fumiaki Tabuchi
- Laboratory of Microbiology, Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo, Japan
| | | | - Masaki Ishii
- Teikyo University Institute of Medical Mycology, Tokyo, Japan.,Genome Pharmaceuticals Institute Co. Ltd, Tokyo, Japan
| | - Keita Tatsuno
- Faculty of Medicine, Department of Infection Control and Prevention, The University of Tokyo, Tokyo, Japan
| | - Mitsuhiro Okazaki
- Department of Medical Technology, School of Health Sciences, Tokyo University of Technology, Tokyo, Japan
| | - Tomoaki Sato
- Faculty of Medicine, Department of Infection Control and Prevention, The University of Tokyo, Tokyo, Japan
| | - Kyoji Moriya
- Faculty of Medicine, Department of Infection Control and Prevention, The University of Tokyo, Tokyo, Japan
| | - Kazuhisa Sekimizu
- Teikyo University Institute of Medical Mycology, Tokyo, Japan.,Genome Pharmaceuticals Institute Co. Ltd, Tokyo, Japan
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11
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Antibiotic tolerance and the alternative lifestyles of Staphylococcus aureus. Essays Biochem 2017; 61:71-79. [PMID: 28258231 DOI: 10.1042/ebc20160061] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Revised: 11/22/2016] [Accepted: 11/25/2016] [Indexed: 12/11/2022]
Abstract
Staphylococcus aureus has an incredible ability to survive, either by adapting to environmental conditions or defending against exogenous stress. Although there are certainly important genetic traits, in part this ability is provided by the breadth of modes of growth S. aureus can adopt. It has been proposed that while within their host, S. aureus survives host-generated and therapeutic antimicrobial stress via alternative lifestyles: a persister sub-population, through biofilm growth on host tissue or by growing as small colony variants (SCVs). Key to an understanding of chronic and relapsing S. aureus infections is determining the molecular basis for its switch to these quasi-dormant lifestyles. In a multicellular biofilm, the metabolically quiescent bacterial community additionally produces a highly protective extracellular polymeric substance (EPS). Furthermore, there are bacteria within a biofilm community that have an altered physiology potentially equivalent to persister cells. Recent studies have directly linked the cellular ATP production by persister cells as their key feature and the basis for their tolerance of a range of antibiotics. In clinical settings, SCVs of S. aureus have been observed for many years; when cultured, these cells form non-pigmented colonies and are approximately ten times smaller than their counterparts. Various genotypic factors have been identified in attempts to characterize S. aureus SCVs and different environmental stresses have been implicated as important inducers.
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12
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Prax M, Mechler L, Weidenmaier C, Bertram R. Glucose Augments Killing Efficiency of Daptomycin Challenged Staphylococcus aureus Persisters. PLoS One 2016; 11:e0150907. [PMID: 26960193 PMCID: PMC4784881 DOI: 10.1371/journal.pone.0150907] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2014] [Accepted: 02/21/2016] [Indexed: 02/05/2023] Open
Abstract
Treatment of Staphylococcus aureus in stationary growth phase with high doses of the antibiotic daptomycin (DAP) eradicates the vast majority of the culture and leaves persister cells behind. Despite resting in a drug-tolerant and dormant state, persister cells exhibit metabolic activity which might be exploited for their elimination. We here report that the addition of glucose to S. aureus persisters treated with DAP increased killing by up to five-fold within one hour. This glucose-DAP effect also occurred with strains less sensitive to the drug. The underlying mechanism is independent of the proton motive force and was not observed with non-metabolizable 2-deoxy-glucose. Our results are consistent with two hypotheses on the glucose-DAP interplay. The first is based upon glucose-induced carbohydrate transport proteins that may influence DAP and the second suggests that glucose may trigger the release or activity of cell-lytic proteins to augment DAP’s mode of action.
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Affiliation(s)
- Marcel Prax
- Interfakultäres Institut für Mikrobiologie und Infektionsmedizin, Lehrbereich Mikrobielle Genetik, Auf der Morgenstelle 28, Eberhard Karls Universität Tübingen, 72076 Tübingen, Germany
- Paul-Ehrlich-Institut, Mikrobiologische Sicherheit, Paul-Ehrlich-Str. 51–59, 63225 Langen, Germany
| | - Lukas Mechler
- Interfakultäres Institut für Mikrobiologie und Infektionsmedizin, Lehrbereich Mikrobielle Genetik, Auf der Morgenstelle 28, Eberhard Karls Universität Tübingen, 72076 Tübingen, Germany
| | - Christopher Weidenmaier
- Interfakultäres Institut für Mikrobiologie und Infektionsmedizin, Medizinische Mikrobiologie und Hygiene, Elfriede-Aulhorn-Str. 6, Eberhard Karls Universität Tübingen, 72076 Tübingen, Germany
| | - Ralph Bertram
- Interfakultäres Institut für Mikrobiologie und Infektionsmedizin, Lehrbereich Mikrobielle Genetik, Auf der Morgenstelle 28, Eberhard Karls Universität Tübingen, 72076 Tübingen, Germany
- Klinikum Nürnberg Medical School GmbH, Research Department, Paracelsus Medical University, Nuremberg, Germany
- * E-mail:
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13
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Diagnosis and treatment of bacteremia and endocarditis due to Staphylococcus aureus. A clinical guideline from the Spanish Society of Clinical Microbiology and Infectious Diseases (SEIMC). Enferm Infecc Microbiol Clin 2015; 33:625.e1-625.e23. [PMID: 25937457 DOI: 10.1016/j.eimc.2015.03.015] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2015] [Accepted: 03/16/2015] [Indexed: 01/30/2023]
Abstract
Both bacteremia and infective endocarditis caused by Staphylococcus aureus are common and severe diseases. The prognosis may darken not infrequently, especially in the presence of intracardiac devices or methicillin-resistance. Indeed, the optimization of the antimicrobial therapy is a key step in the outcome of these infections. The high rates of treatment failure and the increasing interest in the influence of vancomycin susceptibility in the outcome of infections caused by both methicillin-susceptible and -resistant isolates has led to the research of novel therapeutic schemes. Specifically, the interest raised in recent years on the new antimicrobials with activity against methicillin-resistant staphylococci has been also extended to infections caused by susceptible strains, which still carry the most important burden of infection. Recent clinical and experimental research has focused in the activity of new combinations of antimicrobials, their indication and role still being debatable. Also, the impact of an appropriate empirical antimicrobial treatment has acquired relevance in recent years. Finally, it is noteworthy the impact of the implementation of a systematic bundle of measures for improving the outcome. The aim of this clinical guideline is to provide an ensemble of recommendations in order to improve the treatment and prognosis of bacteremia and infective endocarditis caused by S. aureus, in accordance to the latest evidence published.
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14
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Heterogeneity of genetic pathways toward daptomycin nonsusceptibility in Staphylococcus aureus determined by adjunctive antibiotics. Antimicrob Agents Chemother 2015; 59:2799-806. [PMID: 25733508 DOI: 10.1128/aac.04990-14] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2014] [Accepted: 02/24/2015] [Indexed: 01/17/2023] Open
Abstract
Daptomycin is increasingly used in combination with other antibiotics to enhance antimicrobial efficacy and/or to mitigate the emergence of daptomycin nonsusceptibility (DNS). This study used a clinical methicillin-resistant Staphylococcus aureus (MRSA) strain in which DNS emerged upon therapy to examine the influence of antibiotic combinations on the development of mutations in specific genes (mprF, rpoBC, dltA, cls2, and yycFG) previously associated with DNS. Whole genomes of bacteria obtained following 28 days of in vitro exposure to daptomycin with or without adjunctive clarithromycin, linezolid, oxacillin, or trimethoprim-sulfamethoxazole were sequenced, and the sequences were compared to that of the progenitor isolate. The addition of oxacillin to medium containing daptomycin prevented the emergence of mprF mutation but did not prevent rpoBC mutation (P < 0.01). These isolates maintained susceptibility to daptomycin during the combined exposure (median MIC, 1 mg/liter). Daptomycin plus clarithromycin or linezolid resulted in low-level (1.5 to 8 mg/liter) and high-level (12 to 96 mg/liter) DNS, respectively, and did not prevent mprF mutation. However, these same combinations prevented rpoBC mutation. Daptomycin alone or combined with linezolid or trimethoprim-sulfamethoxazole resulted in high-level DNS and mutations in mprF plus rpoBC, cls2, and yycFG. Combining daptomycin with different antimicrobials alters the mutational space available for DNS development, thereby favoring the development of predictable collateral susceptibilities.
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