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Oritavancin

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https://www.readbyqxmd.com/read/28221772/desleucyl-oritavancin-with-a-damaged-d-ala-d-ala-binding-site-inhibits-the-transpeptidation-step-of-cell-wall-biosynthesis-in-whole-cells-of-staphylococcus-aureus
#1
Sung Joon Kim, Manmilan Singh, Shasad Sharif, Jacob Schaefer
We have used solid-state NMR to characterize the exact nature of the dual mode of action of oritavancin in preventing cell-wall assembly in Staphylococcus aureu. Measurements performed on whole cells labeled selectively in vivo have established that des-N-methylleucyl-N-4-(4-fluorophenyl)benzyl-chloroeremomycin, an Edman degradation product of [19F]oritavancin, which has a damaged D-Ala-D-Ala binding aglycon, is a potent inhibitor of the transpeptidase activity of cell-wall biosynthesis. The desleucyl-drug binds to partially cross-linked peptidoglycan by a cleft formed between the drug aglycon and its biphenyl hydrophobic sidechain...
February 21, 2017: Biochemistry
https://www.readbyqxmd.com/read/28159446/in-vitro-activity-of-oritavancin-against-gram-positive-pathogens-isolated-in-canadian-hospital-laboratories-from-2011-to-2015
#2
James A Karlowsky, Andrew J Walkty, Melanie R Baxter, Francis F Arhin, Gregory Moeck, Heather J Adam, George G Zhanel
Gram-positive bacterial pathogens isolated from patient specimens submitted to 15 Canadian hospital laboratories from 2011 to 2015 were tested in the coordinating laboratory for susceptibility to oritavancin and comparative antimicrobial agents using the Clinical and Laboratory Standards Institute M07-A10 (2015) broth microdilution method. Oritavancin's in vitro activity was equivalent to, or more potent than, vancomycin, daptomycin, linezolid, and tigecycline against methicillin-susceptible Staphylococcus aureus (n=2680; oritavancin MIC90, 0...
January 20, 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/28155918/surface-mediated-cooperative-interactions-of-drugs-enhance-mechanical-forces-for-antibiotic-action
#3
Joseph W Ndieyira, Joe Bailey, Samadhan B Patil, Manuel Vögtli, Matthew A Cooper, Chris Abell, Rachel A McKendry, Gabriel Aeppli
The alarming increase of pathogenic bacteria that are resistant to multiple antibiotics is now recognized as a major health issue fuelling demand for new drugs. Bacterial resistance is often caused by molecular changes at the bacterial surface, which alter the nature of specific drug-target interactions. Here, we identify a novel mechanism by which drug-target interactions in resistant bacteria can be enhanced. We examined the surface forces generated by four antibiotics; vancomycin, ristomycin, chloroeremomycin and oritavancin against drug-susceptible and drug-resistant targets on a cantilever and demonstrated significant differences in mechanical response when drug-resistant targets are challenged with different antibiotics although no significant differences were observed when using susceptible targets...
February 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28137232/synthesis-properties-and-mechanism-of-action-of-new-generation-of-polycyclic-glycopeptide-antibiotics
#4
Eugenia N Olsufyeva, Anna N Tevyashova
The increased resistance of glycopeptide based antibiotics has become a serious problem for the chemotherapy of infections triggered by resistant Gram-positive bacteria. This has motivated the urgent sincere efforts to develop potent glycopeptide-based antibiotics in both academy and industry research laboratories. Understanding of the mechanism of action of natural and modified glycopeptides is considered as the basis for the rational design of compounds with valuable properties to achieve the fundamental results...
January 30, 2017: Current Topics in Medicinal Chemistry
https://www.readbyqxmd.com/read/28134678/what-is-new-in-the-management-of-skin-and-soft-tissue-infections-in-2016
#5
Garyphallia Poulakou, Efthymia Giannitsioti, Sotirios Tsiodras
PURPOSE OF REVIEW: Skin and soft tissue infections (SSTIs) are the most frequent infectious cause of referrals to emergency departments and hospital admissions in developed world, contributing to significant morbidity and healthcare expenditures. We sought to review recent literature covering epidemiology and management of SSTIs. RECENT FINDINGS: Incidence trends of SSTIs were increasing worldwide with Staphylococcus aureus and streptococci predominating and methicillin-resistant S...
April 2017: Current Opinion in Infectious Diseases
https://www.readbyqxmd.com/read/28134677/are-there-any-reasons-to-change-our-behavior-in-necrotizing-fasciitis-with-the-advent-of-new-antibiotics
#6
Francesco Menichetti, Simone Giuliano, Simona Fortunato
PURPOSE OF REVIEW: The treatment of necrotizing fasciitis requires a multifaceted approach, consisting of surgical source control with immediate surgical debridement along with life support, clinical monitoring, and antimicrobial therapy. Many drugs are now available for the treatment of this life-threatening infectious disease, and the purpose of this review is to provide the reader with an updated overview of the newest therapeutic options. RECENT FINDINGS: Because most necrotizing soft tissue infections are polymicrobial, broad-spectrum coverage is advisable...
April 2017: Current Opinion in Infectious Diseases
https://www.readbyqxmd.com/read/28118218/obesity-and-skin-and-soft-tissue-infections-how-to-optimize-antimicrobial-usage-for-prevention-and-treatment
#7
Mordechai Grupper, David P Nicolau
PURPOSE OF REVIEW: Skin and soft tissue infections (SSTIs) are prevalent in the obese population, with rising trend expected. Although numerous antibiotics are available for the prevention and treatment of SSTIs, their characterization in obese patients is not a regulatory mandate. Consequently, information that carries importance for optimizing the dosing regimen in the obese population may not be readily available. This review focuses on the most recent pharmacokinetic and pharmacodynamic data on this topic with attention to cefazolin for surgical prophylaxis as well as antibiotics that are active against methicillin-resistant Staphylococcus aureus (MRSA)...
January 23, 2017: Current Opinion in Infectious Diseases
https://www.readbyqxmd.com/read/28078655/single-dose-oritavancin-compared-to-standard-of-care-iv-antibiotics-for-acute-bacterial-skin-and-skin-structure-infection-in-the-outpatient-setting-a-retrospective-real-world-study
#8
Patrick J Anastasio, Pete Wolthoff, Annmarie Galli, Weihong Fan
INTRODUCTION: Cost-containment strategies are shifting the treatment of acute bacterial skin and skin structure infections (ABSSSI) from inpatient to outpatient settings. Current standard of care (SoC) requires multiple-dose regimens, which are associated with high hospitalization rates and high costs. Oritavancin, a new single-dose antibiotic for ABSSSI, may be suitable for outpatient therapy. This analysis evaluates the effectiveness, costs, and resource utilization of oritavancin vs...
January 11, 2017: Infectious Diseases and Therapy
https://www.readbyqxmd.com/read/27956417/effects-of-oritavancin-on-coagulation-tests-in-the-clinical-laboratory
#9
Adam Belley, Richard Robson, John L Francis, Dorothy M Adcock, Stefan Tiefenbacher, Christopher M Rubino, Greg Moeck, David Sylvester, Michael N Dudley, Jeffery Loutit
Previous studies have shown that some lipoglycopeptide and lipopeptide antimicrobial agents may cause falsely elevated values for some phospholipid-dependent coagulation tests. The effect of oritavancin, a lipoglycopeptide antibiotic, on coagulation test results was explored using pooled human plasma samples spiked with drug and in a clinical study after an infusion of a single 1,200-mg intravenous dose of oritavancin in normal healthy volunteers. Pooled plasma with oritavancin added ex vivo showed concentration-dependent prolongation of prothrombin time/international normalized ratio (PT/INR), activated partial thromboplastin time (aPTT), and dilute Russell viper venom time (DRVVT) test results...
February 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/27939809/prevalence-of-macrolide-lincosamide-resistance-and-multidrug-resistance-phenotypes-in-streptococcal-isolates-causing-infections-in-european-hospitals-evaluation-of-the-in-vitro-activity-of-oritavancin-and-comparator-agents
#10
Rodrigo E Mendes, Mariana Castanheira, David J Farrell, Robert K Flamm, Helio S Sader, Ronald N Jones
The aim of this study was to evaluate the prevalence of resistance to erythromycin alone (M) and to erythromycin and clindamycin (cMLSB) as well as multidrug resistance (MDR) phenotypes (resistance to at least three classes of drugs) among clinical enterococci from European countries and adjacent geographic regions. The in vitro activity of oritavancin against these isolates was also evaluated. A total of 2569 streptococci collected from 12 European countries as well as Russia, Turkey and Israel were included...
November 2, 2016: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/27904526/new-agents-approved-for-treatment-of-acute-staphylococcal-skin-infections
#11
Jan Tatarkiewicz, Anna Staniszewska, Magdalena Bujalska-Zadrożny
Vancomycin has been a predominant treatment for methicillin-resistant Staphylococcus aureus (MRSA) infections for decades. However, growing reservations about its efficacy led to an urgent need for new antibiotics effective against MRSA and other drug-resistant Staphylococcus aureus strains. This review covers three new anti-MRSA antibiotics that have been recently approved by the FDA: dalbavancin, oritavancin, and tedizolid. The mechanism of action, indications, antibacterial activity profile, microbial resistance, pharmacokinetics, clinical efficacy, adverse effects, interactions as well as available formulations and administration of each of these new antibiotics are described...
December 1, 2016: Archives of Medical Science: AMS
https://www.readbyqxmd.com/read/27890418/comparative-in-vitro-activity-of-oritavancin-and-other-agents-against-methicillin-susceptible-and-methicillin-resistant-staphylococcus-aureus
#12
Debora Sweeney, Dean L Shinabarger, Francis F Arhin, Adam Belley, Greg Moeck, Chris M Pillar
Methicillin-resistant Staphylococcus aureus (MRSA) infections constitute a threat to the public health due to their prevalence and associated mortality and morbidity. Several agents have been recently approved to treat MRSA skin infections including lipoglycopeptides (dalbavancin, oritavancin, and telavancin), ceftaroline, and tedizolid. This study compared the MIC, minimum bactericidal concentration (MBC), and time-kill of these agents alongside daptomycin, linezolid, and vancomycin against MRSA (n=15); meropenem, cefazolin, and nafcillin were also included against methicillin-susceptible S...
February 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/27889013/methicillin-resistant-staphylococcus-aureus-infections-a-review-of-the-currently-available-treatment-options
#13
REVIEW
S M Purrello, J Garau, E Giamarellos, T Mazzei, F Pea, A Soriano, S Stefani
This review is the result of discussions that took place at the 5th MRSA Working Group Consensus Meeting and explores the possible treatment options available for different types of infections due to methicillin-resistant Staphylococcus aureus (MRSA), focusing on those antibiotics that could represent a valid alternative to vancomycin. In fact, whilst vancomycin remains a viable option, its therapy is moving towards individualised dosing. Other drugs, such as the new lipoglycopeptides (oritavancin, dalbavancin and telavancin) and fifth-generation cephalosporins (ceftaroline and ceftobiprole), are showing good in vitro potency and in vivo efficacy, especially for patients infected with micro-organisms with higher vancomycin minimum inhibitory concentrations (MICs)...
December 2016: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/27856721/comparative-in-vitro-activity-of-oritavancin-and-other-agents-against-vancomycin-susceptible-and-resistant-enterococci
#14
Debora Sweeney, Audrey Stoneburner, Dean L Shinabarger, Francis F Arhin, Adam Belley, Greg Moeck, Chris M Pillar
No abstract text is available yet for this article.
November 17, 2016: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/27829328/use-of-oritavancin-novel-new-lipoglycopeptide-in-the-treatment-of-prosthetic-joint-infections-pji-a-possible-alternative-novel-approach-to-a-difficult-problem
#15
Suresh Jude Antony, Leigh G Cooper
Prosthetic joint infections (PJI) result in significant morbidity, mortality and cost to patients and the health system. Traditional treatment involves a two-staged revision and occasionally a single staged revision along with intravenous antibiotics (IV) and or oral antibiotics for several weeks to months. The use of a single staged revision along with an antibiotic which has a prolonged half life and is bactericidal would be ideal. We present 2 patients who were treated successfully with a single stage revision/antibiotic spacer and a new novel long acting lipoglycopeptide called oritavancin...
November 8, 2016: Infectious Disorders Drug Targets
https://www.readbyqxmd.com/read/27721280/in-vitro-activity-of-ceftaroline-a-novel-antibiotic-against-methicillin-resistant-staphylococcus-aureus
#16
Vaishali Gaikwad, Tejash Gohel, Shrijeet Panickar, Vijay Chincholkar, Santosh Mangalkar
INTRODUCTION: Staphylococcus is one of the most common causes of nosocomial infection, especially pneumonia, surgical site infections, blood stream infections, and continues to be a major cause of community-acquired infections. The emergence of penicillin resistance followed by the development and spread of strains resistant to the semisynthetic penicillins such as methicillin, oxacillin and nafcillin, macrolides, tetracycline, and aminoglycosides has made the treatment of staphylococcal infection a global challenge...
October 2016: Indian Journal of Pathology & Microbiology
https://www.readbyqxmd.com/read/27665522/pooled-analysis-of-single-dose-oritavancin-in-the-treatment-of-acute-bacterial-skin-and-skin-structure-infections-caused-by-gram-positive-pathogens-including-a-large-patient-subset-with-methicillin-resistant-staphylococcus-aureus
#17
G Ralph Corey, Francis F Arhin, Matthew A Wikler, Daniel F Sahm, Barry N Kreiswirth, José R Mediavilla, Samantha Good, Claude Fiset, Hai Jiang, Greg Moeck, Heidi Kabler, Sinikka Green, William O'Riordan
Oritavancin is a lipoglycopeptide antibiotic with bactericidal activity against Gram-positive pathogens, including methicillin-resistant Staphylococcus aureus (MRSA). The phase 3 studies SOLO I and SOLO II demonstrated comparable efficacy and safety of a single dose of oritavancin compared with 7-10 days of twice-daily vancomycin in adults with acute bacterial skin and skin-structure infections (ABSSSIs). The present analysis assessed clinical responses by pathogen at 48-72 h and at study days 14-24 in SOLO patients within the pooled data set...
November 2016: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/27663982/approved-glycopeptide-antibacterial-drugs-mechanism-of-action-and-resistance
#18
Daina Zeng, Dmitri Debabov, Theresa L Hartsell, Raul J Cano, Stacy Adams, Jessica A Schuyler, Ronald McMillan, John L Pace
The glycopeptide antimicrobials are a group of natural product and semisynthetic glycosylated peptides that show antibacterial activity against Gram-positive organisms through inhibition of cell-wall synthesis. This is achieved primarily through binding to the d-alanyl-d-alanine terminus of the lipid II bacterial cell-wall precursor, preventing cross-linking of the peptidoglycan layer. Vancomycin is the foundational member of the class, showing both clinical longevity and a still preferential role in the therapy of methicillin-resistant Staphylococcus aureus and of susceptible Enterococcus spp...
December 1, 2016: Cold Spring Harbor Perspectives in Medicine
https://www.readbyqxmd.com/read/27609052/longitudinal-2001-14-analysis-of-enterococci-and-vre-causing-invasive-infections-in-european-and-us-hospitals-including-a-contemporary-2010-13-analysis-of-oritavancin-in-vitro-potency
#19
Rodrigo E Mendes, Mariana Castanheira, David J Farrell, Robert K Flamm, Helio S Sader, Ronald N Jones
OBJECTIVES: The objective of this study was to evaluate the prevalence and in vitro susceptibility of enterococci and VRE among bloodstream infections in European and US hospitals over time. METHODS: Isolates recovered from the blood of infected patients in Europe (72 996) and the USA (67 725) between 2001 and 2014 were included in the prevalence analysis. A subset (2349) collected during 2011-13 was used for the in vitro activity analysis. RESULTS: Enterococcus faecium rates increased in Europe (from 1...
September 8, 2016: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/27598313/clinical-pathway-for-moderate-to-severe-acute-bacterial-skin-and-skin-structure-infections-from-a-us-perspective-a-roundtable-discussion
#20
John A Bosso, Anthony M Casapao, Jonathan Edwards, Kenneth Klinker, Christopher McCoy, David P Nicolau, Katherine K Perez, Andrew Marcarelli, Deeksha Dua
This article was written with the aim to establish a consensus clinical pathway for long-acting lipoglycopeptide antibiotics such as oritavancin (Orbactiv®) and dalbavancin (Dalvance®) for the treatment of acute bacterial skin and skin structure infections (ABSSSI). Seven infectious diseases pharmacy specialists from a variety of facilities across the United States (US) participated in a roundtable discussion to consider the use of newer single-dose long-acting lipoglycopeptides, and integrate them into clinical pathways for ABSSSI...
October 2016: Hospital Practice (Minneapolis)
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