Abstract:
:Objective: The aim of the present study was to encapsulate vancomycin in different liposomal formulations and compare the in vitro antimicrobial activity against Staphylococcus aureus biofilms. Methods: Large unilamellar vesicles of conventional (LUV VAN), fusogenic (LUVfuso VAN), and cationic (LUVcat VAN) liposomes encapsulating VAN were characterized in terms of size, polydispersity index, zeta potential, morphology, encapsulation efficiency (%EE) and in vitro release kinetics. The formulations were tested for their Minimum Inhibitory Concentration (MIC) and inhibitory activity on biofilm formation and viability, using methicillin-susceptible S. aureus ATCC 29213 and methicillin-resistant S. aureus ATCC 43300 strains. Key Findings: LUV VAN showed better %EE (32.5%) and sustained release than LUVfuso VAN, LUVcat VAN, and free VAN. The formulations were stable over 180 days at 4°C, except for LUV VAN, which was stable up to 120 days. The MIC values for liposomal formulations and free VAN ranged from 0.78 to 1.56 µg/ml against both tested strains, with no difference in the inhibition of biofilm formation as compared to free VAN. However, when treating mature biofilm, encapsulated LUVfuso VAN increased the antimicrobial efficacy as compared to the other liposomal formulations and to free VAN, demonstrating a better ability to penetrate the biofilm. Conclusion: Vancomycin encapsulated in fusogenic liposomes demonstrated enhanced antimicrobial activity against mature S. aureus biofilms.
journal_name
Front Pharmacoljournal_title
Frontiers in pharmacologyauthors
Scriboni AB,Couto VM,Ribeiro LNM,Freires IA,Groppo FC,de Paula E,Franz-Montan M,Cogo-Müller Kdoi
10.3389/fphar.2019.01401subject
Has Abstractpub_date
2019-11-29 00:00:00pages
1401issn
1663-9812journal_volume
10pub_type
杂志文章abstract::Cognitive impairment is a central feature of schizophrenia and has shown to play a crucial role in the psychosocial function of the disorder. Over the past few years, several cognitive remediation (CR) interventions have been developed for schizophrenia, whose effectiveness has also been widely demonstrated by systema...
journal_title:Frontiers in pharmacology
pub_type: 杂志文章,评审
doi:10.3389/fphar.2018.01542
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abstract::Background and Objectives: Limited research focuses on the risk of ischemic cerebrovascular disease associated with use of dipeptidyl peptidase-4 inhibitors (DPP-4 inhibitors) in patients with type 2 diabetes mellitus in Taiwan. This study aimed to investigate the association between DPP-4 inhibitors use and the first...
journal_title:Frontiers in pharmacology
pub_type: 杂志文章
doi:10.3389/fphar.2017.00859
更新日期:2017-11-22 00:00:00
abstract::Upon interaction, neutrophils can potentially release neutrophil extracellular traps (NETs) on the surface of an implanted electrospun template, which may be a significant preconditioning event for implantable biomaterials of yet unknown consequences. In this study, we investigated the potential of polydioxanone templ...
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doi:10.3389/fphar.2018.00289
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abstract::Objectives: The aim of this study is to conduct an analysis on the regulation and application of managed entry agreements (MEA) for oncology drugs across different European countries. Methods: Literature search and document analysis were performed between September 2015 and June 2016 to collect information on the regu...
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pub_type: 杂志文章
doi:10.3389/fphar.2017.00171
更新日期:2017-04-04 00:00:00
abstract:INTRODUCTION:European countries need to learn from each other to address unsustainable increases in pharmaceutical expenditures. OBJECTIVE:To assess the influence of the many supply and demand-side initiatives introduced across Europe to enhance prescribing efficiency in ambulatory care. As a result provide future gui...
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abstract::The use of nanomaterials to modulate the tumor microenvironment has great potential to advance outcomes in patients with lung cancer. Nanomaterials can be used to prolong the delivery time of therapeutics enabling their specific targeting to tumors while minimizing and potentially eliminating cytotoxic effects. Using ...
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pub_type: 杂志文章,评审
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abstract::Purpose: To analyze MiRs expression in serum of UM patients, respect to healthy donors, and to compare this data with MiRs expressed in formalin-fixed, paraffin-embedded UM samples. Methods: Expression profile of 754 miRNAs was performed in serum of patients with uveal melanoma who underwent primary enucleation. The l...
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pub_type: 杂志文章
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journal_title:Frontiers in pharmacology
pub_type: 杂志文章,评审
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journal_title:Frontiers in pharmacology
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journal_title:Frontiers in pharmacology
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journal_title:Frontiers in pharmacology
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doi:10.3389/fphar.2018.00596
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abstract::Objective: The purpose of this study was to evaluate the anticancer effects of Ophiopogonin D' (OPD', a natural product extracted from a traditional Chinese medicine (Radix Ophiopogonis) against androgen-independent prostate cancer cells and to explore the underlying molecular mechanism(s) of action. Methods: The CCK-...
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