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Noukrati H, Hamdan Y, Marsan O, El Fatimy R, Cazalbou S, Rey C, Barroug A, Combes C. Sodium fusidate loaded apatitic calcium phosphates: Adsorption behavior, release kinetics, antibacterial efficacy, and cytotoxicity assessment. Int J Pharm 2024; 660:124331. [PMID: 38866083 DOI: 10.1016/j.ijpharm.2024.124331] [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: 03/27/2024] [Revised: 06/07/2024] [Accepted: 06/08/2024] [Indexed: 06/14/2024]
Abstract
The present work reports the adsorption, release, antibacterial properties, and in vitro cytotoxicity of sodium fusidate (SF) associated with a carbonated calcium phosphate bone cement. The adsorption study of SF on cement powder compared to stoichiometric hydroxyapatite and nanocrystalline carbonated apatite was investigated to understand the interaction between this antibiotic and the calcium phosphate phases involved in the cement formulation and setting reaction. The adsorption data revealed a fast kinetic process. However, the evolution of the amount of adsorbed SF was well described by a Freundlich-type isotherm characterized by a low adsorption capacity of the materials toward the SF molecule. The in vitro release results indicated a prolonged and controlled SF release for up to 34 days. The SF amounts eluted daily were at a therapeutic level (0.5-2 mg/L) and close to the antibiotic minimum inhibitory concentration (0.1-0.9 mg/L). Furthermore, the release data fitting and modeling suggested that the drug release occurred mainly by a diffusion mechanism. The antibacterial activity showed the effectiveness of SF released from the formulated cements against Staphylococcus aureus. Furthermore, the biological in vitro study demonstrated that the tested cements didn't show any cytotoxicity towards human peripheral blood mononuclear cells and did not significantly induce inflammation markers like IL-8.
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Affiliation(s)
- Hassan Noukrati
- Cadi Ayyad University, Faculty of Sciences Semlalia (SCIMATOP), Bd Prince My Abdellah, BP 2390, 40000 Marrakech, Morocco; CIRIMAT, Toulouse INP, Université Toulouse 3 Paul Sabatier, CNRS, Université de Toulouse, ENSIACET, 4 Allée Emile Monso, 31030 Toulouse Cedex 4, France; Institute of Biological Sciences, ISSB, Faculty of Medical Sciences (FMS), Mohammed VI Polytechnic University (UM6P), Ben Guerir 43150, Morocco.
| | - Yousra Hamdan
- Institute of Biological Sciences, ISSB, Faculty of Medical Sciences (FMS), Mohammed VI Polytechnic University (UM6P), Ben Guerir 43150, Morocco
| | - Olivier Marsan
- CIRIMAT, Toulouse INP, Université Toulouse 3 Paul Sabatier, CNRS, Université de Toulouse, ENSIACET, 4 Allée Emile Monso, 31030 Toulouse Cedex 4, France
| | - Rachid El Fatimy
- Institute of Biological Sciences, ISSB, Faculty of Medical Sciences (FMS), Mohammed VI Polytechnic University (UM6P), Ben Guerir 43150, Morocco
| | - Sophie Cazalbou
- CIRIMAT, Université Toulouse 3 Paul Sabatier, Toulouse INP, CNRS, Université de Toulouse, 118 Route de Narbonne, 31062 Toulouse Cedex 9, France
| | - Christian Rey
- CIRIMAT, Toulouse INP, Université Toulouse 3 Paul Sabatier, CNRS, Université de Toulouse, ENSIACET, 4 Allée Emile Monso, 31030 Toulouse Cedex 4, France
| | - Allal Barroug
- Cadi Ayyad University, Faculty of Sciences Semlalia (SCIMATOP), Bd Prince My Abdellah, BP 2390, 40000 Marrakech, Morocco; Institute of Biological Sciences, ISSB, Faculty of Medical Sciences (FMS), Mohammed VI Polytechnic University (UM6P), Ben Guerir 43150, Morocco
| | - Christèle Combes
- CIRIMAT, Toulouse INP, Université Toulouse 3 Paul Sabatier, CNRS, Université de Toulouse, ENSIACET, 4 Allée Emile Monso, 31030 Toulouse Cedex 4, France
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Dubinin MV, Ilzorkina AI, Salimova EV, Landage MS, Khoroshavina EI, Gudkov SV, Belosludtsev KN, Parfenova LV. Effect of Fusidic Acid and Some Nitrogen-Containing Derivatives on Liposomal and Mitochondrial Membranes. MEMBRANES 2023; 13:835. [PMID: 37888007 PMCID: PMC10608686 DOI: 10.3390/membranes13100835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2023] [Revised: 10/05/2023] [Accepted: 10/19/2023] [Indexed: 10/28/2023]
Abstract
The paper assesses the membranotropic action of the natural antibiotic fusidic acid (FA) and its derivatives. It was found that a FA analogue with ethylenediamine moiety (derivative 2), in contrast to native FA and 3,11-dioxime analogue (derivative 1), is able to increase the mobility of the lipid bilayer in the zone of lipid headgroups, as well as to induce permeabilization of lecithin liposome membranes. A similar effect of derivative 2 is also observed in the case of rat liver mitochondrial membranes. We noted a decrease in the microviscosity of the mitochondrial membrane and nonspecific permeabilization of organelle membranes in the presence of this agent, which was accompanied by a decrease in mitochondrial Δψ and OXPHOS efficiency. This led to a reduction in mitochondrial calcium retention capacity. The derivatives also reduced the production of H2O2 by mitochondria. The paper considers the relationship between the structure of the tested compounds and the observed effects.
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Affiliation(s)
- Mikhail V. Dubinin
- Department of Biochemistry, Cell Biology and Microbiology, Mari State University, pl. Lenina 1, 424001 Yoshkar-Ola, Russia
| | - Anna I. Ilzorkina
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Institutskaya 3, 142290 Pushchino, Russia
| | - Elena V. Salimova
- Institute of Petrochemistry and Catalysis, Russian Academy of Sciences, Prospekt Oktyabrya 141, 450075 Ufa, Russia
| | - Manish S. Landage
- Department of Biochemistry, Cell Biology and Microbiology, Mari State University, pl. Lenina 1, 424001 Yoshkar-Ola, Russia
| | - Ekaterina I. Khoroshavina
- Department of Biochemistry, Cell Biology and Microbiology, Mari State University, pl. Lenina 1, 424001 Yoshkar-Ola, Russia
| | - Sergey V. Gudkov
- Prokhorov General Physics Institute of the Russian Academy of Sciences, Vavilov St. 38, 119991 Moscow, Russia
| | - Konstantin N. Belosludtsev
- Department of Biochemistry, Cell Biology and Microbiology, Mari State University, pl. Lenina 1, 424001 Yoshkar-Ola, Russia
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Institutskaya 3, 142290 Pushchino, Russia
| | - Lyudmila V. Parfenova
- Institute of Petrochemistry and Catalysis, Russian Academy of Sciences, Prospekt Oktyabrya 141, 450075 Ufa, Russia
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Salimova EV, Mozgovoj OS, Efimova SS, Ostroumova OS, Parfenova LV. 3-Amino-Substituted Analogues of Fusidic Acid as Membrane-Active Antibacterial Compounds. MEMBRANES 2023; 13:309. [PMID: 36984696 PMCID: PMC10056636 DOI: 10.3390/membranes13030309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 02/27/2023] [Accepted: 03/03/2023] [Indexed: 06/18/2023]
Abstract
Fusidic acid (FA) is an antibiotic with high activity against Staphylococcus aureus; it has been used in clinical practice since the 1960s. However, the narrow antimicrobial spectrum of FA limits its application in the treatment of bacterial infections. In this regard, this work aims both at the study of the antimicrobial effect of a number of FA amines and at the identification of their potential biological targets. In this way, FA analogues containing aliphatic and aromatic amino groups and biogenic polyamine, spermine and spermidine, moieties at the C-3 atom, were synthesized (20 examples). Pyrazinecarboxamide-substituted analogues exhibit a high antibacterial activity against S. aureus (MRSA) with MIC ≤ 0.25 μg/mL. Spermine and spermidine derivatives, along with activity against S. aureus, also inhibit the growth and reproduction of Gram-negative bacteria Escherichia coli, Acinetobacter baumannii, and Pseudomonas aeruginosa, and have a high fungicidal effect against Candida albicans and Cryptococcus neoformans. The study of the membrane activity demonstrated that the spermidine- and spermine-containing compounds are able to immerse into membranes and disorder the lipidsleading to a detergent effect. Moreover, spermine-based compounds are also able to form ion-permeable pores in the lipid bilayers mimicking the bacterial membranes. Using molecular docking, inhibition of the protein synthesis elongation factor EF-G was proposed, and polyamine substituents were shown to make the greatest contribution to the stability of the complexes of fusidic acid derivatives with biological targets. This suggests that the antibacterial effect of the obtained compounds may be associated with both membrane activity and inhibition of the elongation factor EF-G.
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Affiliation(s)
- Elena V. Salimova
- Institute of Petrochemistry and Catalysis, Ufa Federal Research Center, Russian Academy of Sciences, 141 Prospect Oktyabrya, 450075 Ufa, Russia
| | - Oleg S. Mozgovoj
- Institute of Petrochemistry and Catalysis, Ufa Federal Research Center, Russian Academy of Sciences, 141 Prospect Oktyabrya, 450075 Ufa, Russia
| | - Svetlana S. Efimova
- Institute of Cytology of Russian Academy of Sciences, 4 Tikhoretsky Prospect, 194064 Saint Petersburg, Russia
| | - Olga S. Ostroumova
- Institute of Cytology of Russian Academy of Sciences, 4 Tikhoretsky Prospect, 194064 Saint Petersburg, Russia
| | - Lyudmila V. Parfenova
- Institute of Petrochemistry and Catalysis, Ufa Federal Research Center, Russian Academy of Sciences, 141 Prospect Oktyabrya, 450075 Ufa, Russia
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Ziroglu N, Koluman A, Kaleci B, Tanriverdi B, Tanriverdi G, Kural A, Bilgili MG. The antibiotics supplemented bone cement improved the masquelet's induced membrane in a rat femur critical size defect model. Injury 2023; 54:329-338. [PMID: 36334950 DOI: 10.1016/j.injury.2022.10.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 10/10/2022] [Accepted: 10/24/2022] [Indexed: 11/05/2022]
Abstract
BACKGROUND Masquelet technique is a two-stage surgical procedure used in the treatment of critical-size bone defects (CSD). Adding antibiotics to polymethylmethacrylate (PMMA) is still questionable to create higher quality induced membrane (IM). The aim of the study was to evaluate the effects of three antibiotic-supplemented cement, fusidic acid, teicoplanin, and gentamicin, on osteogenesis and IM progression applied to rat femur CSD model by comparing histopathological, biochemical, and immunohistochemical findings. METHODS Twenty-eight male rats were divided into four groups control, gentamicin (G), teicoplanin (T), and fusidic acid (FA). A 10 mm CSD was created in rat femurs. In the postoperative 4th week, intracardiac blood samples were collected for biochemical analysis of bone alkaline phosphatase (BALP), osteocalcin (OC), and tumor necrosis factor-alpha (TNF-α) levels. IMs obtained in secondary operation were fixed and prepared for histopathological scoring of membrane progression and immunohistochemical evaluation of rat-specific Transforming Growth Factor-Beta (TGF-β), Runt-related Transcription Factor 2 (Runx2), and Vascular Endothelial Growth Factor (VEGF) expressions. RESULTS Levels of BALP and OC in serum didn't change among groups significantly while serum TNF-α levels significantly decreased in all antibiotic groups compared to the control group (P = 0.017). Histological scores of groups FA and T were significantly higher than those of groups Control and G (P = 0.0007). IMs of groups T and FA showed good progression while those of groups Control and G were also moderately progressed. A significant increase in TGF-β expression was observed in group G and FA (P = 0.001) while a significant increase in the expression of VEGF was observed in groups G and T compared to the control group (P = 0.036). CONCLUSIONS The bone cement impregnated with thermostable and safe antibiotics, gentamicin, fusidic acid, and teicoplanin can increase osteogenesis and support IM progression by increasing the expressions of TGF-β and VEGF. Anabolic effects of induced membranes used in the treatment of critical-size bone defects can be enhanced by antibiotic-supplemented PMMAs applied by altering the original technique.
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Affiliation(s)
- Nezih Ziroglu
- Department of Orthopedics and Traumatology, Acibadem Mehmet Ali Aydinlar University School of Medicine, Acibadem Atakent Hospital, Kucukcekmece/Istanbul, Turkey.
| | - Alican Koluman
- Department of Orthopedics and Traumatology, Istanbul Bakirkoy Dr. Sadi Konuk Education and Research Hospital, University of Health Sciences, Istanbul, Turkey
| | - Belisa Kaleci
- Department of Histology and Embryology, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Bulent Tanriverdi
- Department of Orthopedics and Traumatology, Istanbul Bakirkoy Dr. Sadi Konuk Education and Research Hospital, University of Health Sciences, Istanbul, Turkey
| | - Gamze Tanriverdi
- Department of Histology and Embryology, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Alev Kural
- Department of Biochemistry, Istanbul Bakirkoy Dr. Sadi Konuk Training and Research Hospital, University of Health Sciences, Istanbul, Turkey
| | - Mustafa Gokhan Bilgili
- Department of Orthopedics and Traumatology, Istanbul Bakirkoy Dr. Sadi Konuk Education and Research Hospital, University of Health Sciences, Istanbul, Turkey
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Zheng W, Tu B, Zhang Z, Li J, Yan Z, Su K, Deng D, Sun Y, Wang X, Zhang B, Zhang K, Wong WL, Wu P, Hong WD, Ang S. Ligand and structure-based approaches for the exploration of structure-activity relationships of fusidic acid derivatives as antibacterial agents. Front Chem 2023; 10:1094841. [PMID: 36688047 PMCID: PMC9852990 DOI: 10.3389/fchem.2022.1094841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 12/19/2022] [Indexed: 01/09/2023] Open
Abstract
Introduction: Fusidic acid (FA) has been widely applied in the clinical prevention and treatment of bacterial infections. Nonetheless, its clinical application has been limited due to its narrow antimicrobial spectrum and some side effects. Purpose: Therefore, it is necessary to explore the structure-activity relationships of FA derivatives as antibacterial agents to develop novel ones possessing a broad antimicrobial spectrum. Methods and result: First, a pharmacophore model was established on the nineteen FA derivatives with remarkable antibacterial activities reported in previous studies. The common structural characteristics of the pharmacophore emerging from the FA derivatives were determined as those of six hydrophobic centers, two atom centers of the hydrogen bond acceptor, and a negative electron center around the C-21 field. Then, seven FA derivatives have been designed according to the reported structure-activity relationships and the pharmacophore characteristics. The designed FA derivatives were mapped on the pharmacophore model, and the Qfit values of all FA derivatives were over 50 and FA-8 possessed the highest value of 82.66. The molecular docking studies of the partial target compounds were conducted with the elongation factor G (EF-G) of S. aureus. Furthermore, the designed FA derivatives have been prepared and their antibacterial activities were evaluated by the inhibition zone test and the minimum inhibitory concentration (MIC) test. The derivative FA-7 with a chlorine group as the substituent group at C-25 of FA displayed the best antibacterial property with an MIC of 3.125 µM. Subsequently, 3D-QSAR was carried on all the derivatives by using the CoMSIA mode of SYBYL-X 2.0. Conclusion: Hence, a computer-aided drug design model was developed for FA, which can be further used to optimize FA derivatives as highly potent antibacterial agents.
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Affiliation(s)
- Wende Zheng
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, China,International Healthcare Innovation Institute, Jiangmen, China
| | - Borong Tu
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, China,International Healthcare Innovation Institute, Jiangmen, China
| | - Zhen Zhang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, China,International Healthcare Innovation Institute, Jiangmen, China
| | - Jinxuan Li
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, China,International Healthcare Innovation Institute, Jiangmen, China
| | - Zhenping Yan
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, China,International Healthcare Innovation Institute, Jiangmen, China
| | - Kaize Su
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, China,International Healthcare Innovation Institute, Jiangmen, China
| | - Duanyu Deng
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, China,International Healthcare Innovation Institute, Jiangmen, China
| | - Ying Sun
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, China,International Healthcare Innovation Institute, Jiangmen, China
| | - Xu Wang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, China,International Healthcare Innovation Institute, Jiangmen, China
| | - Bingjie Zhang
- School of Biomedicine and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, China
| | - Kun Zhang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, China,International Healthcare Innovation Institute, Jiangmen, China
| | - Wing-Leung Wong
- The State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China
| | - Panpan Wu
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, China,International Healthcare Innovation Institute, Jiangmen, China,*Correspondence: Panpan Wu, ; Weiqian David Hong, ; Song Ang,
| | - Weiqian David Hong
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, China,International Healthcare Innovation Institute, Jiangmen, China,*Correspondence: Panpan Wu, ; Weiqian David Hong, ; Song Ang,
| | - Song Ang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, China,International Healthcare Innovation Institute, Jiangmen, China,*Correspondence: Panpan Wu, ; Weiqian David Hong, ; Song Ang,
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Developing synergistic drug combinations to restore antibiotic sensitivity in drug-resistant Mycobacterium tuberculosis. Antimicrob Agents Chemother 2021; 65:AAC.02554-20. [PMID: 33619062 PMCID: PMC8092878 DOI: 10.1128/aac.02554-20] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Tuberculosis (TB) is a leading global cause of mortality owing to an infectious agent, accounting for almost one-third of antimicrobial resistance (AMR) deaths annually. We aimed to identify synergistic anti-TB drug combinations with the capacity to restore therapeutic efficacy against drug-resistant mutants of the causative agent, Mycobacterium tuberculosis We investigated combinations containing the known translational inhibitors, spectinomycin (SPT) and fusidic acid (FA), or the phenothiazine, chlorpromazine (CPZ), which disrupts mycobacterial energy metabolism. Potentiation of whole-cell drug efficacy was observed in SPT-CPZ combinations. This effect was lost against an M. tuberculosis mutant lacking the major facilitator superfamily (MFS) efflux pump, Rv1258c. Notably, the SPT-CPZ combination partially restored SPT efficacy against an SPT-resistant mutant carrying a g1379t point mutation in rrs, encoding the mycobacterial 16S ribosomal RNA. Combinations of SPT with FA, which targets the mycobacterial elongation factor G, exhibited potentiating activity against wild-type M. tuberculosis Moreover, this combination produced a modest potentiating effect against both FA-monoresistant and SPT-monoresistant mutants. Finally, combining SPT with the frontline anti-TB agents, rifampicin (RIF) and isoniazid, resulted in enhanced activity in vitro and ex vivo against both drug-susceptible M. tuberculosis and a RIF-monoresistant rpoB S531L mutant.These results support the utility of novel potentiating drug combinations in restoring antibiotic susceptibility of M. tuberculosis strains carrying genetic resistance to any one of the partner compounds.
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Dziwornu GA, Kamunya S, Ntsabo T, Chibale K. Novel antimycobacterial C-21 amide derivatives of the antibiotic fusidic acid: synthesis, pharmacological evaluation and rationalization of media-dependent activity using molecular docking studies in the binding site of human serum albumin. MEDCHEMCOMM 2019; 10:961-969. [PMID: 31303994 DOI: 10.1039/c9md00161a] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Accepted: 04/11/2019] [Indexed: 11/21/2022]
Abstract
Fusidic acid is a natural product antibiotic used clinically, primarily against staphylococcal infections. It has also exhibited antimycobacterial activity against Mycobacterium species, including Mycobacterium tuberculosis (Mtb). Novel C-21 fusidic acid amides were synthesized and evaluated for antimycobacterial activity in a drug repositioning approach for tuberculosis. The synthesized compounds exhibited good potency in MB7H9/CAS medium albeit showing low to no activity in MB7H9/ADC medium. The fusidic acid ethanamides were, generally, the most potent of the analogues evaluated for antimycobacterial activity (MIC90 < 10 μM) in the MB7H9/CAS medium. The lack of activity in the MB7H9/ADC medium was supported by strong binding interactions in the fusidic acid binding site of the human serum albumin (HSA) protein. The most potent antimycobacterial analogue was the N-(4-sulfamoylbenzyl)fusidic acid amide (1.26) with an MIC90 value of 2.71 μM.
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Affiliation(s)
- Godwin Akpeko Dziwornu
- Department of Chemistry , University of Cape Town , Rondebosch 7701 , South Africa . ; ; Tel: +27 21 6502553
| | - Stephanie Kamunya
- Department of Chemistry , University of Cape Town , Rondebosch 7701 , South Africa . ; ; Tel: +27 21 6502553
| | - Tando Ntsabo
- Institute of Infectious Disease and Molecular Medicine (IDM) , University of Cape Town , Rondebosch 7701 , South Africa.,Drug Discovery and Development Centre (H3D) , University of Cape Town , Rondebosch 7701 , South Africa
| | - Kelly Chibale
- Department of Chemistry , University of Cape Town , Rondebosch 7701 , South Africa . ; ; Tel: +27 21 6502553.,Institute of Infectious Disease and Molecular Medicine (IDM) , University of Cape Town , Rondebosch 7701 , South Africa.,Drug Discovery and Development Centre (H3D) , University of Cape Town , Rondebosch 7701 , South Africa.,South African Medical Research Council Drug Discovery and , Development Research Unit , University of Cape Town , Rondebosch 7701 , South Africa
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Tüzüner T, Dimkov A, Nicholson JW. The effect of antimicrobial additives on the properties of dental glass-ionomer cements: a review. ACTA BIOMATERIALIA ODONTOLOGICA SCANDINAVICA 2019; 5:9-21. [PMID: 30652117 PMCID: PMC6327935 DOI: 10.1080/23337931.2018.1539623] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Accepted: 10/10/2018] [Indexed: 12/12/2022]
Abstract
Aim: The aim of this article is to review the literature on the use of antimicrobial additives in glass-ionomer dental cements. Method: An electronic search between 1987 and the end of 2017 was performed using PubMed, Web of Science and Google search engines with the terms glass-ionomer, glass polyalkenoate, antibacterial and antimicrobial as the key words. The search was refined by excluding the majority of references concerned with cement antimicrobial properties only. Extra papers already known to the authors were added to those considered. Results: A total of 92 relevant articles have been cited in the review of which 55 are specifically concerned with the enhancement of antibacterial properties of glass-ionomers, both conventional and resin-modified, with additives. In addition, information is included on the uses of glass-ionomers and the biological properties of the antibacterial additives employed. There are several reports that show that additives are typically released by diffusion, and that a high proportion is usually left behind, trapped in the cement. Additives generally increase setting times of cements, and reduce mechanical properties. However, smaller amounts of additive have only slight effects and the longer-term durability of cements appears unaffected. Conclusion: Modified glass-ionomer cements seem to be acceptable for clinical use, especially in the Atraumatic Restorative Treatment (ART) technique.
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Affiliation(s)
- Tamer Tüzüner
- Department of Paediatric Dentistry, Faculty of Dentistry, Karadeniz Technical University, Trabzon, Turkey
| | - Aleksandar Dimkov
- Department of Paediatric and Preventive Dentistry, Faculty of Dental Medicine, St Cyril and St Methodius University, Skopje, Macedonia
| | - John W. Nicholson
- Bluefield Centre for Biomaterials, London, United Kingdom
- Dental Physical Sciences, Institute of Dentistry, Barts & The London School of Medicine and Dentistry, Queen Mary University of London, London, United Kingdom
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Wu PP, He H, Hong WD, Wu TR, Huang GY, Zhong YY, Tu BR, Gao M, Zhou J, Zhao SQ, Li DL, Xu XT, Sheng ZJ, Ward SA, O'Neill PM, Zhang K. The biological evaluation of fusidic acid and its hydrogenation derivative as antimicrobial and anti-inflammatory agents. Infect Drug Resist 2018; 11:1945-1957. [PMID: 30498366 PMCID: PMC6207271 DOI: 10.2147/idr.s176390] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Background Fusidic acid (FA) (WU-FA-00) is the only commercially available antimicrobial from the fusidane family that has a narrow spectrum of activity against Gram-positive bacteria. Methods Herein, the hydrogenation derivative (WU-FA-01) of FA was prepared and both compounds were examined against a panel of six bacterial strains. In addition, their anti-inflammatory properties were evaluated using a 12-O-tetradecanoylphorbol-13-acetate (TPA)-induced mouse ear edema model. Results The results of the antimicrobial assay revealed that both WU-FA-00 and WU-FA-01 displayed a high level of antimicrobial activity against Gram-positive strains. Moreover, killing kinetic studies were performed and the results were in accordance with the minimum inhibitory concentration and minimum bactericidal concentration results. We also demonstrated that the topical application of WU-FA-00 and WU-FA-01 effectively decreased TPA-induced ear edema in a dose-dependent manner. This inhibitory effect was associated with the inhibition of TPA-induced upregulation of proinflammatory cytokines IL-1β, TNF-α, and COX-2. WU-FA-01 significantly suppressed the expression levels of p65, IκB-α, and p-IκB-α in the TPA-induced mouse ear model. Conclusion Overall, our results showed that WU-FA-00 and WU-FA-01 not only had effective antimicrobial activities in vitro, especially to the Gram-positive bacteria, but also possessed strong anti-inflammatory effects in vivo. These results provide a scientific basis for developing FA derivatives as antimicrobial and anti-inflammatory agents.
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Affiliation(s)
- Pan-Pan Wu
- Faculty of Chemical and Environmental Engineering, Wuyi University, Jiangmen, China, ; .,Department of Pharmaceutical Engineering, Faculty of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, China, ; .,International Healthcare Innovation Institute (Jiangmen), Jiangmen, China, ;
| | - Hao He
- Faculty of Chemical and Environmental Engineering, Wuyi University, Jiangmen, China, ; .,International Healthcare Innovation Institute (Jiangmen), Jiangmen, China, ;
| | - W David Hong
- Faculty of Chemical and Environmental Engineering, Wuyi University, Jiangmen, China, ; .,International Healthcare Innovation Institute (Jiangmen), Jiangmen, China, ; .,Research Centre for Drugs and Diagnostics, Liverpool School of Tropical Medicine, Liverpool, UK.,Department of Chemistry, University of Liverpool, UK
| | - Tong-Rong Wu
- Faculty of Chemical and Environmental Engineering, Wuyi University, Jiangmen, China, ; .,International Healthcare Innovation Institute (Jiangmen), Jiangmen, China, ;
| | - Gui-Ying Huang
- Department of Pharmaceutical Engineering, Faculty of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, China, ;
| | - Ying-Ying Zhong
- Department of Pharmaceutical Engineering, Faculty of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, China, ;
| | - Bo-Rong Tu
- Faculty of Chemical and Environmental Engineering, Wuyi University, Jiangmen, China, ; .,International Healthcare Innovation Institute (Jiangmen), Jiangmen, China, ;
| | - Min Gao
- Faculty of Chemical and Environmental Engineering, Wuyi University, Jiangmen, China, ; .,International Healthcare Innovation Institute (Jiangmen), Jiangmen, China, ;
| | - Jun Zhou
- Faculty of Chemical and Environmental Engineering, Wuyi University, Jiangmen, China, ; .,International Healthcare Innovation Institute (Jiangmen), Jiangmen, China, ;
| | - Su-Qing Zhao
- Faculty of Chemical and Environmental Engineering, Wuyi University, Jiangmen, China, ; .,Department of Pharmaceutical Engineering, Faculty of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, China, ; .,International Healthcare Innovation Institute (Jiangmen), Jiangmen, China, ;
| | - Dong-Li Li
- Faculty of Chemical and Environmental Engineering, Wuyi University, Jiangmen, China, ; .,International Healthcare Innovation Institute (Jiangmen), Jiangmen, China, ;
| | - Xue-Tao Xu
- Faculty of Chemical and Environmental Engineering, Wuyi University, Jiangmen, China, ; .,International Healthcare Innovation Institute (Jiangmen), Jiangmen, China, ;
| | - Zhao-Jun Sheng
- Faculty of Chemical and Environmental Engineering, Wuyi University, Jiangmen, China, ; .,International Healthcare Innovation Institute (Jiangmen), Jiangmen, China, ;
| | - Stephen A Ward
- Research Centre for Drugs and Diagnostics, Liverpool School of Tropical Medicine, Liverpool, UK
| | | | - Kun Zhang
- Faculty of Chemical and Environmental Engineering, Wuyi University, Jiangmen, China, ; .,Department of Pharmaceutical Engineering, Faculty of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, China, ; .,International Healthcare Innovation Institute (Jiangmen), Jiangmen, China, ;
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EKAPOPPHAN D, SRISUTTHAKARN A, MOONARMART W, BUDDHIRONGAWATR R, BANGPHOOMI N. Identification and antimicrobial susceptibility of microorganisms isolated from severe corneal ulcers of dogs in Thailand. J Vet Med Sci 2018; 80:1259-1265. [PMID: 29925698 PMCID: PMC6115253 DOI: 10.1292/jvms.18-0045] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Accepted: 06/11/2018] [Indexed: 12/12/2022] Open
Abstract
This study aims to determine the microbiological profile and risk factors associated with antimicrobial-resistant bacteria in canine severe corneal ulcers. Thirty-two corneal and conjunctival swabs were collected from dogs with diagnosed severe corneal ulcers that presented to Prasu-Arthorn veterinary teaching hospital in Nakhon Pathom, Thailand from June 2015 to June 2016. Microorganisms were identified by means of genotypic and phenotypic approaches. Of 32 ulcers sampled, 26 (81.3%) yielded culturable microorganisms with 24 bacterial isolates and 7 fungal isolates. The most commonly isolated bacteria were Staphylococcus spp. (45.8%, 11/24) and Pseudomonas aeruginosa (20.8%, 5/24). Out of 11 staphylococcal isolates identified, 10 carried the mecA gene providing methicillin resistance. The extended-spectrum β-lactamase (ESBL) encoding genes blaCTX-M and blaVEB-1 were found in an Acinetobacter lwoffii isolate, and blaSHV was found in a P. aeruginosa isolate. Based on the Clinical Laboratory Standards Institute (CLSI) and European Committee on Antimicrobial Susceptibility Testing (EUCAST) breakpoint criteria, minimum inhibitory concentrations values showed that all bacteria, except for staphylococci, were susceptible to current ophthalmic antibiotics. More than 50% of staphylococci were resistant to all generations of fluoroquinolones and fusidic acid. Chloramphenicol was highly active against staphylococci (81.3% susceptible). The width (P=0.02) and the depth (P=0.04) of ulcers predicted greater risk of yielding resistant bacteria. The identification of antimicrobial-resistant bacteria prompts practitioners to be prudent when choosing ophthalmic antibiotics for severe corneal ulcers.
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Affiliation(s)
- Daneeya EKAPOPPHAN
- Department of Pre-clinic and Applied Animal Science, Faculty
of Veterinary Science, Mahidol University, 999 Phuttamonton 4, Salaya, Phuttamonton,
Nakhon Pathom 73170, Thailand
| | - Athicha SRISUTTHAKARN
- Department of Pre-clinic and Applied Animal Science, Faculty
of Veterinary Science, Mahidol University, 999 Phuttamonton 4, Salaya, Phuttamonton,
Nakhon Pathom 73170, Thailand
| | - Walasinee MOONARMART
- Department of Clinical Sciences and Public Health, Faculty
of Veterinary Science, Mahidol University, 999 Phuttamonton 4, Salaya, Phuttamonton,
Nakhon Pathom 73170, Thailand
| | - Ruangrat BUDDHIRONGAWATR
- Department of Clinical Sciences and Public Health, Faculty
of Veterinary Science, Mahidol University, 999 Phuttamonton 4, Salaya, Phuttamonton,
Nakhon Pathom 73170, Thailand
| | - Norasuthi BANGPHOOMI
- Department of Pre-clinic and Applied Animal Science, Faculty
of Veterinary Science, Mahidol University, 999 Phuttamonton 4, Salaya, Phuttamonton,
Nakhon Pathom 73170, Thailand
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11
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Kaur G, Pavadai E, Wittlin S, Chibale K. 3D-QSAR Modeling and Synthesis of New Fusidic Acid Derivatives as Antiplasmodial Agents. J Chem Inf Model 2018; 58:1553-1560. [DOI: 10.1021/acs.jcim.8b00105] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Gurminder Kaur
- Department of Chemistry, University of Cape Town, Rondebosch 7701, South Africa
| | - Elumalai Pavadai
- Department of Chemistry, University of Cape Town, Rondebosch 7701, South Africa
| | - Sergio Wittlin
- Swiss Tropical and Public Health Institute, Socinstrasse 57, 4051 Basel, Switzerland
- University of Basel, 4002 Basel, Switzerland
| | - Kelly Chibale
- Department of Chemistry, University of Cape Town, Rondebosch 7701, South Africa
- South African Medical Research Council Drug Discovery and Development Research Unit, Department of Chemistry and Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Rondebosch 7701, South Africa
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12
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Ibrahim ARS, Elokely KM, Ferreira D, Ragab AE. Microbial Oxidation of the Fusidic Acid Side Chain by Cunninghamella echinulata. Molecules 2018; 23:molecules23040970. [PMID: 29690500 PMCID: PMC6017311 DOI: 10.3390/molecules23040970] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Revised: 04/17/2018] [Accepted: 04/20/2018] [Indexed: 11/16/2022] Open
Abstract
Biotransformation of fusidic acid (1) was accomplished using a battery of microorganisms including Cunninghamella echinulata NRRL 1382, which converted fusidic acid (1) into three new metabolites 2⁻4 and the known metabolite 5. These metabolites were identified using 1D and 2D NMR and HRESI-FTMS data. Structural assignment of the compounds was supported via computation of ¹H- and 13C-NMR chemical shifts. Compounds 2 and 3 were assigned as the 27-hydroxy and 26-hydroxy derivatives of fusidic acid, respectively. Subsequent oxidation of 3 afforded aldehyde 4 and the dicarboxylic acid 5. Compounds 2, 4 and 5 were screened for antimicrobial activity against different Gram positive and negative bacteria, Mycobacterium smegmatis, M. intercellulare and Candida albicans. The compounds showed lower activity compared to fusidic acid against the tested strains. Molecular docking studies were carried out to assist the structural assignments and predict the binding modes of the metabolites.
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Affiliation(s)
- Abdel-Rahim S Ibrahim
- Department of Pharmacognosy, Faculty of Pharmacy, Tanta University, Tanta 31527, Egypt.
| | - Khaled M Elokely
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Tanta University, Tanta 31527, Egypt.
- Institute for Computational Molecular Science and Department of Chemistry, Temple University, Philadelphia, PA 19122, USA.
| | - Daneel Ferreira
- Department of BioMolecular Sciences, Division of Pharmacognosy, School of Pharmacy, The University of Mississippi, University, MS 38677-1848, USA.
| | - Amany E Ragab
- Department of Pharmacognosy, Faculty of Pharmacy, Tanta University, Tanta 31527, Egypt.
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13
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Lofoco G, Quercioli P, Ciucci F, Bardocci A, De gaetano C, Steigerwalt R. Fusidic Acid vs Ofloxacin Prophylaxis before Cataract Surgery. Eur J Ophthalmol 2018. [DOI: 10.1177/112067210501500610] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- G. Lofoco
- Department of Ophthalmology, S. Pietro-Fatebenefratelli Hospital, Roma
| | - P. Quercioli
- Department of Ophthalmology, S. Pietro-Fatebenefratelli Hospital, Roma
| | - F. Ciucci
- Department of Ophthalmology, S. Pietro-Fatebenefratelli Hospital, Roma
| | - A. Bardocci
- Department of Ophthalmology, S. Pietro-Fatebenefratelli Hospital, Roma
| | - C. De gaetano
- Department of Ophthalmology, S. Pietro-Fatebenefratelli Hospital, Roma
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14
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Bortolin M, Bidossi A, De Vecchi E, Avveniente M, Drago L. In vitro Antimicrobial Activity of Chlorquinaldol against Microorganisms Responsible for Skin and Soft Tissue Infections: Comparative Evaluation with Gentamicin and Fusidic Acid. Front Microbiol 2017. [PMID: 28642751 PMCID: PMC5462991 DOI: 10.3389/fmicb.2017.01039] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Skin and soft tissue infections (SSTIs) are a major therapeutic challenge for clinicians. The emergence of pathogens with decreased susceptibility to available therapies has become an emerging problem often associated with treatment failure. Hence, there is an urgent need for novel broad-spectrum antimicrobial agents. The purpose of this study was to assess the feasibility of chlorquinaldol as an alternative approach to currently used topical antibiotics for the treatment of skin and soft tissue infections. The activity of chlorquinaldol was investigated against a collection of bacterial isolates responsible for skin infections, including strains resistant to fusidic acid and gentamicin. After determination of MIC and MBC, time-kill experiments were carried out by counting colonies grown after 0, 3, 6, 9, 24, and 48 h of incubation with concentrations equal to ¼×, ½×, 1×, 2×, and 4× MIC of chlorquinaldol, gentamicin, or fusidic acid. Staphylococci resulted the Gram-positives most sensitive to chlorquinaldol, with MIC-values ranging from 0.016 to 0.5 mg/L. A lower activity was observed against Gram-negative bacteria, with 77% of the isolates being inhibited at concentrations ranging from 128 to 512 mg/L. Generally, in time-kill studies, chlorquinaldol showed a bactericidal activity at the higher concentrations (2×, 4× MIC) after 24-48 h of incubation. In conclusion, chlorquinaldol may represent a valuable alternative to conventional topical antibiotics for the treatment of skin and soft tissue infections.
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Affiliation(s)
- Monica Bortolin
- Laboratory of Clinical Chemistry and Microbiology, IRCCS Galeazzi Orthopaedic InstituteMilan, Italy
| | - Alessandro Bidossi
- Laboratory of Clinical Chemistry and Microbiology, IRCCS Galeazzi Orthopaedic InstituteMilan, Italy
| | - Elena De Vecchi
- Laboratory of Clinical Chemistry and Microbiology, IRCCS Galeazzi Orthopaedic InstituteMilan, Italy
| | - Maura Avveniente
- Laboratory of Clinical Chemistry and Microbiology, IRCCS Galeazzi Orthopaedic InstituteMilan, Italy
| | - Lorenzo Drago
- Laboratory of Clinical Chemistry and Microbiology, IRCCS Galeazzi Orthopaedic InstituteMilan, Italy.,Laboratory of Clinical Microbiology, Department of Biomedical Sciences for Health, University of MilanMilan, Italy
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15
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Barbosa PDPM, Speranza P, Ohara A, da Silva ÉB, de Angelis DA, Macedo GA. Fungi from Brazilian Savannah and Atlantic rainforest show high antibacterial and antifungal activity. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2017. [DOI: 10.1016/j.bcab.2017.01.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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16
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Ho WY, Choo QC, Chew CH. Predominance of Three Closely Related Methicillin-ResistantStaphylococcus aureusClones Carrying a UniqueccrC-Positive SCCmectype III and the Emergence ofspa t304andt690SCCmectype IVpvl+MRSA Isolates in Kinta Valley, Malaysia. Microb Drug Resist 2017; 23:215-223. [DOI: 10.1089/mdr.2015.0250] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Affiliation(s)
- Wai-Yew Ho
- Centre for Foundation Studies, Universiti Tunku Abdul Rahman, Kampar, Malaysia
| | - Quok-Cheong Choo
- Departments of Biological Sciences, Universiti Tunku Abdul Rahman, Kampar, Malaysia
| | - Choy-Hoong Chew
- Biomedical Science, Faculty of Science, Universiti Tunku Abdul Rahman, Kampar, Malaysia
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17
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Espinoza-Moraga M, Singh K, Njoroge M, Kaur G, Okombo J, De Kock C, Smith PJ, Wittlin S, Chibale K. Synthesis and biological characterisation of ester and amide derivatives of fusidic acid as antiplasmodial agents. Bioorg Med Chem Lett 2017; 27:658-661. [DOI: 10.1016/j.bmcl.2016.11.077] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2016] [Revised: 11/23/2016] [Accepted: 11/24/2016] [Indexed: 11/16/2022]
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18
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VanEperen AS, Segreti J. Empirical therapy in Methicillin-resistant Staphylococcus Aureus infections: An Up-To-Date approach. J Infect Chemother 2016; 22:351-9. [PMID: 27066882 DOI: 10.1016/j.jiac.2016.02.012] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Accepted: 02/16/2016] [Indexed: 12/11/2022]
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) continues to be an important pathogen worldwide, with high prevalence of infection in both community and hospital settings. Timely and appropriate choice of empirical therapy in the setting of MRSA infection is imperative due to the high rate of associated morbidity and mortality with MRSA infections. Initial choices should be made based on the site and severity of the infection, most notably moderate skin and soft tissue infections which may be treated with oral antibiotics (trimethoprim-sulfamethoxazole, clindamycin, doxycycline/minocycline, linezolid) in the outpatient setting, versus choice of parenteral therapy in the inpatient setting of more invasive or severe disease. Though the current recommendations continue to strongly rely on vancomycin as a standard empiric choice in the setting of severe/invasive infections, alternative therapies exist with studies supporting their non-inferiority. This includes the use of linezolid in pneumonia and severe skin and skin structure infections (SSSI) and daptomycin for MRSA bacteremia, endocarditis, SSSIs and bone/joint infections. Additionally, concerns continue to arise in regards to vancomycin, such as increasing isolate MICs, and relatively high rates of clinical failures with vancomycin. Thus, the growing interest in vanomycin alternatives, such as ceftaroline, ceftobribole, dalbavancin, oritavancin, and tedizolid, and their potential role in treating MRSA infections.
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Affiliation(s)
- Alison S VanEperen
- Section of Infectious Diseases, Rush University Medical Center, 600 South Paulina, Suite 143 Armour Academic Facility, Chicago, IL 60612, USA
| | - John Segreti
- Section of Infectious Diseases, Rush University Medical Center, 600 South Paulina, Suite 143 Armour Academic Facility, Chicago, IL 60612, USA.
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19
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Injectability, microstructure and release properties of sodium fusidate-loaded apatitic cement as a local drug-delivery system. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 59:177-184. [DOI: 10.1016/j.msec.2015.09.070] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Revised: 08/28/2015] [Accepted: 09/16/2015] [Indexed: 11/22/2022]
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20
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Fernandes P. Fusidic Acid: A Bacterial Elongation Factor Inhibitor for the Oral Treatment of Acute and Chronic Staphylococcal Infections. Cold Spring Harb Perspect Med 2016; 6:a025437. [PMID: 26729758 DOI: 10.1101/cshperspect.a025437] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Fusidic acid is an oral antistaphylococcal antibiotic that has been used in Europe for more than 40 years to treat skin infections as well as chronic bone and joint infections. It is a steroidal antibiotic and the only marketed member of the fusidane class. Fusidic acid inhibits protein synthesis by binding EF-G-GDP, which results in the inhibition of both peptide translocation and ribosome disassembly. It has a novel structure and novel mode of action and, therefore, there is little cross-resistance with other known antibiotics. Many mutations can occur in the FusA gene that codes for EF-G, and some of these mutations can result in high-level resistance (minimum inhibitory concentration [MIC] > 64 mg/L), whereas others result in biologically unfit staphylococci that require compensatory mutations to survive. Low-level resistance (<8 mg/L) is more common and is mediated by fusB, fusC, and fusD genes that code for small proteins that protect EF-G-GDP from binding fusidic acid. The genes for these proteins are spread by plasmids and can be selected mostly by topical antibiotic use. Reports of resistance have led to combination use of fusidic acid with rifampin, which is superseded by the development of a new dosing regimen for fusidic acid that can be used in monotherapy. It consists of a front-loading dose to decrease the potential for resistance development followed by a maintenance dose. This dosing regimen is now being used in clinical trials in the United States for skin and refractory bone and joint infections.
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21
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Curbete MM, Salgado HRN. A Critical Review of the Properties of Fusidic Acid and Analytical Methods for Its Determination. Crit Rev Anal Chem 2015; 46:352-60. [DOI: 10.1080/10408347.2015.1084225] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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22
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Nanotechnology approaches for antibacterial drug delivery: Preparation and microbiological evaluation of fusogenic liposomes carrying fusidic acid. Int J Antimicrob Agents 2015; 45:622-6. [PMID: 25816979 DOI: 10.1016/j.ijantimicag.2015.01.016] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2014] [Revised: 01/17/2015] [Accepted: 01/21/2015] [Indexed: 11/24/2022]
Abstract
Many antibacterial drugs have some difficulty passing through the bacterial cell membrane, especially if they have a high molecular weight or large spatial structure. Consequently, intrinsic resistance is shown by some bacterial strains. Reduced cell membrane permeability is one of the mechanisms of resistance known for fusidic acid (FUS), a bacteriostatic steroidal compound with activity limited to Gram-positive bacteria. Moreover, the lipophilic character of FUS has been shown to cause drug retention inside the bilayers of cell membranes, preventing its diffusion towards target sites inside the cytoplasm. Targeting antimicrobial agents by means of liposomes may be a valid strategy in the treatment of infections refractory to conventional routes of antimicrobial treatment. On this basis, loading of FUS in fusogenic liposomes (FLs) was planned in this study. Fusogenic small unilamellar vesicles loaded with FUS were produced to evaluate their influence on improving the cell penetration and antibacterial activity of the antibiotic. The produced carriers were technologically characterised and were subjected to an in vitro microbiological assay against several strains of Gram-negative and Gram-positive bacteria. The experimental results showed that encapsulating FUS in a liposomal carrier can improve antimicrobial efficacy and reduce the effective concentration required, probably through putative mechanisms of increased diffusion through the bacterial cell membrane. In fact, whilst free FUS was active only on the tested Gram-positive strains, incubation of FUS-loaded FLs exhibited growth inhibitory activity both against Gram-positive and Gram-negative strains. The lowest MICs were obtained against Staphylococcus epidermidis (≤0.15 μg/mL) and Acinetobacter baumannii (37.5 μg/mL) clinical strains.
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23
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Kaur G, Singh K, Pavadai E, Njoroge M, Espinoza-Moraga M, De Kock C, Smith PJ, Wittlin S, Chibale K. Synthesis of fusidic acid bioisosteres as antiplasmodial agents and molecular docking studies in the binding site of elongation factor-G. MEDCHEMCOMM 2015. [DOI: 10.1039/c5md00343a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Structural modifications through bioisosteric approach yielded fusidic acid analogues with 2–35 folds increase in antiplasmodial activity as compared to fusidic acid.
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Affiliation(s)
- Gurminder Kaur
- Department of Chemistry
- University of Cape Town
- Rondebosch 7701
- South Africa
- South African Medical Research Council Drug Discovery and Development Research Unit
| | - Kawaljit Singh
- Department of Chemistry
- University of Cape Town
- Rondebosch 7701
- South Africa
- South African Medical Research Council Drug Discovery and Development Research Unit
| | - Elumalai Pavadai
- Department of Chemistry
- University of Cape Town
- Rondebosch 7701
- South Africa
- South African Medical Research Council Drug Discovery and Development Research Unit
| | - Mathew Njoroge
- Department of Chemistry
- University of Cape Town
- Rondebosch 7701
- South Africa
- South African Medical Research Council Drug Discovery and Development Research Unit
| | - Marlene Espinoza-Moraga
- Department of Chemistry
- University of Cape Town
- Rondebosch 7701
- South Africa
- South African Medical Research Council Drug Discovery and Development Research Unit
| | - Carmen De Kock
- Division of Clinical Pharmacology
- Department of Medicine
- University of Cape Town
- Groote Schuur Hospital
- Observatory
| | - Peter J. Smith
- Division of Clinical Pharmacology
- Department of Medicine
- University of Cape Town
- Groote Schuur Hospital
- Observatory
| | - Sergio Wittlin
- University of Basel
- 4002 Basel
- Switzerland
- Swiss Tropical and Public Health Institute
- Socinstrasse 57
| | - Kelly Chibale
- Department of Chemistry
- University of Cape Town
- Rondebosch 7701
- South Africa
- South African Medical Research Council Drug Discovery and Development Research Unit
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24
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Kollipara R, Downing C, Lee M, Guidry J, Curtis S, Tyring S. Current and emerging drugs for acute bacterial skin and skin structure infections: an update. Expert Opin Emerg Drugs 2014; 19:431-40. [DOI: 10.1517/14728214.2014.955015] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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25
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Kim BN, Kim ES, Oh MD. Oral antibiotic treatment of staphylococcal bone and joint infections in adults. J Antimicrob Chemother 2013; 69:309-22. [DOI: 10.1093/jac/dkt374] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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26
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Payne AJ, Neal LM, Knoll LJ. Fusidic acid is an effective treatment against Toxoplasma gondii and Listeria monocytogenes in vitro, but not in mice. Parasitol Res 2013; 112:3859-63. [PMID: 23949312 DOI: 10.1007/s00436-013-3574-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2013] [Accepted: 08/04/2013] [Indexed: 11/26/2022]
Abstract
Fusidic acid is a bacteriostatic antibiotic that inhibits the growth of bacteria by preventing the release of translation elongation factor G (EF-G) from the ribosome. The apicomplexan parasite Toxoplasma gondii has an orthologue of bacterial EF-G that can complement bacteria and is necessary for parasite virulence. Fusidic acid has been shown to be effective in tissue culture against the related pathogen Plasmodium falciparum, and current drug treatments against T. gondii are limited. We therefore investigated the therapeutic value of fusidic acid for T. gondii and found that the drug was effective in tissue culture, but not in a mouse model of infection. To determine whether this trend would occur in another intracellular pathogen that elicits a T helper 1-type immune response, we tested the efficacy of fusidic acid for the bacterium Listeria monocytogenes. Similar to its effects on T. gondii, fusidic acid inhibits the growth of L. monocytogenes in vitro, but not in mice. These findings highlight the necessity of in vivo follow-up studies to validate in vitro drug investigations.
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Affiliation(s)
- Amanda J Payne
- Department of Medical Microbiology and Immunology, University of Wisconsin-Madison, 1550 Linden Drive, Madison, WI, 53706, USA
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27
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Wang JL, Tang HJ, Hsieh PH, Chiu FY, Chen YH, Chang MC, Huang CT, Liu CP, Lau YJ, Hwang KP, Ko WC, Wang CT, Liu CY, Liu CL, Hsueh PR. Fusidic acid for the treatment of bone and joint infections caused by meticillin-resistant Staphylococcus aureus. Int J Antimicrob Agents 2012; 40:103-7. [DOI: 10.1016/j.ijantimicag.2012.03.010] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2012] [Accepted: 03/14/2012] [Indexed: 12/29/2022]
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28
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Predicting the exposure and antibacterial activity of fluoroquinolones based on physicochemical properties. Eur J Pharm Sci 2012; 47:21-7. [DOI: 10.1016/j.ejps.2012.04.022] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2011] [Revised: 03/19/2012] [Accepted: 04/27/2012] [Indexed: 11/18/2022]
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29
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Comparison of Disk Diffusion and Etest Methods to Determine the Susceptibility of Staphylococcus aureus Circulating in Riyadh, Saudi Arabia to Fusidic Acid. Int J Microbiol 2012; 2012:391251. [PMID: 22888356 PMCID: PMC3409531 DOI: 10.1155/2012/391251] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2012] [Revised: 05/24/2012] [Accepted: 06/07/2012] [Indexed: 11/17/2022] Open
Abstract
Fusidic acid is a common therapy for staphylococcal infections in Saudi Arabia, but reports have suggested high rates of resistance among clinical isolates. Susceptibility testing of S. aureus to fusidic acid is further complicated by the lack of consensus on mean inhibitory concentrations (MIC) and disk diffusion cutoffs to determine resistance. The purpose of this study was to determine the correlation between disk diffusion and Etest determined MIC susceptibility results in clinical isolates of S. aureus from a large academic hospital in Riyadh, Saudi Arabia. Our data demonstrate excellent correlation between Etest determined MIC and disk diffusion susceptibility data, using either previously proposed zone sizes of ≥21 mm as susceptible and ≤18 mm as resistant or the EUCAST recommended zone size of ≤24 mm for resistance, in an area with relatively high rates of fusidic acid resistance.
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30
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Characterization of fusidic acid-resistant Staphylococcus aureus isolates in the community of Casablanca (Morocco). Int J Med Microbiol 2012; 302:96-100. [DOI: 10.1016/j.ijmm.2011.10.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2011] [Revised: 10/20/2011] [Accepted: 10/23/2011] [Indexed: 11/21/2022] Open
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31
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Said SS, Aloufy AK, El-Halfawy OM, Boraei NA, El-Khordagui LK. Antimicrobial PLGA ultrafine fibers: Interaction with wound bacteria. Eur J Pharm Biopharm 2011; 79:108-18. [DOI: 10.1016/j.ejpb.2011.03.002] [Citation(s) in RCA: 80] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2011] [Revised: 02/26/2011] [Accepted: 03/03/2011] [Indexed: 01/23/2023]
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32
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Farrell DJ, Castanheira M, Chopra I. Characterization of Global Patterns and the Genetics of Fusidic Acid Resistance. Clin Infect Dis 2011; 52 Suppl 7:S487-92. [DOI: 10.1093/cid/cir164] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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33
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Jones RN, Mendes RE, Sader HS, Castanheira M. In Vitro Antimicrobial Findings for Fusidic Acid Tested Against Contemporary (2008–2009) Gram-Positive Organisms Collected in the United States. Clin Infect Dis 2011; 52 Suppl 7:S477-86. [DOI: 10.1093/cid/cir163] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Craft JC, Moriarty SR, Clark K, Scott D, Degenhardt TP, Still JG, Corey GR, Das A, Fernandes P. A Randomized, Double-Blind Phase 2 Study Comparing the Efficacy and Safety of an Oral Fusidic Acid Loading-Dose Regimen to Oral Linezolid for the Treatment of Acute Bacterial Skin and Skin Structure Infections. Clin Infect Dis 2011; 52 Suppl 7:S520-6. [DOI: 10.1093/cid/cir167] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Fernandes P, Pereira D. Efforts to Support the Development of Fusidic Acid in the United States. Clin Infect Dis 2011; 52 Suppl 7:S542-6. [DOI: 10.1093/cid/cir170] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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36
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Kim BN. Oral Agents for the Treatment of Orthopedic Infections Caused by Methicillin-resistant Staphylococci. Infect Chemother 2011. [DOI: 10.3947/ic.2011.43.4.322] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Affiliation(s)
- Baek-Nam Kim
- Department of Internal Medicine, Inje University College of Medicine, Busan, Korea
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Mendoza N, Tyring SK. Emerging drugs for complicated skin and skin-structure infections. Expert Opin Emerg Drugs 2010; 15:509-20. [PMID: 20557269 DOI: 10.1517/14728214.2010.497486] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
UNLABELLED IMPORTANCE OF THE FILED: With the worldwide surge of MRSA, skin and skin-structure infection (SSTI) treatment has become a challenge for physicians. Cultures and antibiotic susceptibility tests for SSTIs are the rule due to the implication in morbidity and mortality rates associated with MRSA infections. The need for new antibiotics is evident and the effort to decrease antibiotic resistance is a world priority. AREAS COVERED IN THIS REVIEW This manuscript accesses the actual treatments and the developing of antibiotics for MRSA SSTIs. WHAT THE READER WILL GAIN This is a review of the data on the available and emerging treatments for MRSA SSTIs. TAKE HOME MESSAGE There is an unmet medical need for new antibiotics in the new millennium. As physicians, we must assure all appropriate procedures are completed in order to reduce the bacterial resistance, especially for MRSA.
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Affiliation(s)
- Natalia Mendoza
- Center for Clinical Studies, 6655 Travis Suite 120, Houston, TX 77030, USA.
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38
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Bouza E. New therapeutic choices for infections caused by methicillin-resistant Staphylococcus aureus. Clin Microbiol Infect 2010; 15 Suppl 7:44-52. [PMID: 19951334 DOI: 10.1111/j.1469-0691.2009.03091.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
In recent years, a marked increase in the incidence of infections caused by methicillin-resistant Staphylococcus aureus (MRSA) has occurred in many countries. This review addresses the effectiveness and limitations of drugs classically used for the treatment of MRSA, e.g. vancomycin, and also newer anti-MRSA antimicrobials, e.g. second-generation glycolipopeptides, tigecycline, and beta-lactams.
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Affiliation(s)
- E Bouza
- Servicio de Microbiología Clínica y E. Infecciosas, Hospital General Universitario Gregorio Marañón, Universidad Complutenste, Madrid, and Ciber de Enfermedades Respiratories (CIBERES), Spain.
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Spectrum of activity, mutation rates, synergistic interactions, and the effects of pH and serum proteins for fusidic acid (CEM-102). Diagn Microbiol Infect Dis 2010; 66:301-7. [DOI: 10.1016/j.diagmicrobio.2009.10.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2009] [Accepted: 10/21/2009] [Indexed: 11/19/2022]
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OTBERG NINA, WU WENYU, KANG HOON, MARTINKA MAGDALENA, ALZOLIBANI ABDULLATEEFA, RESTREPO ISABEL, SHAPIRO JERRY. Folliculitis Decalvans Developing 20 Years After Hair Restoration Surgery in Punch Grafts: Case Report. Dermatol Surg 2009; 35:1852-6. [DOI: 10.1111/j.1524-4725.2009.01305.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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41
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Abstract
This study evaluated the effect of human plasma on the in vitro bactericidal activity of the novel diaminopyrimidine iclaprim against methicillin (meticillin)-susceptible and -resistant Staphylococcus aureus strains. MICs and minimal bactericidal concentrations (MBCs) of iclaprim, with approximately 93% protein binding, were similar in the absence and in the presence of 50% human plasma; MICs and MBCs ranged from 0.06 to 0.125 microg/ml. Furthermore, the activity of iclaprim was not affected by plasma, with > or = 99.9% reduction in CFU after 5.0 to 7.6 h.
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42
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van Dijk A, Molhoek EM, Veldhuizen EJ, Bokhoven JLTV, Wagendorp E, Bikker F, Haagsman HP. Identification of chicken cathelicidin-2 core elements involved in antibacterial and immunomodulatory activities. Mol Immunol 2009; 46:2465-73. [DOI: 10.1016/j.molimm.2009.05.019] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2009] [Accepted: 05/18/2009] [Indexed: 11/28/2022]
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43
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Lemaire S, Kosowska-Shick K, Julian K, Tulkens PM, Van Bambeke F, Appelbaum PC. Activities of antistaphylococcal antibiotics towards the extracellular and intraphagocytic forms of Staphylococcus aureus isolates from a patient with persistent bacteraemia and endocarditis. Clin Microbiol Infect 2008; 14:766-77. [PMID: 18727801 DOI: 10.1111/j.1469-0691.2008.02035.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Decreased susceptibility of Staphylococcus aureus to antistaphylococcal agents may be associated with inability to eradicate intracellular forms, which could explain therapeutic failures. This hypothesis was tested using clinical isolates obtained from a patient with persistent staphylococcal bacteraemia under therapy. Four isogenic isolates (three from tissue, one from blood) with increased MICs for vancomycin (1-4 mg/L) and for daptomycin (1-4 mg/L) were collected after an initial 16-day treatment with vancomycin-rifampicin-gentamicin, followed by 13-20 days of treatment with daptomycin-rifampicin-gentamicin. Isolates were tested for MICs and for: (i) vancomycin (BODIPY-FL-vancomycin) and daptomycin binding; (ii) cell wall turnover (loss of N-acetyl-d-[1-(14)C]glucosamine in 30 min after 1 h of labelling); and (iii) Triton X-100-induced autolysis. Extracellular (broth) and intracellular (THP-1 macrophages) activities of rifampicin, linezolid and fusidic acid at C(max), and of vancomycin, daptomycin, quinupristin-dalfopristin and oritavancin over a wide range of extracellular concentrations (with pharmacological modelling to determine E(max)), were measured at 24 h. Increases in vancomycin MICs correlated with increased drug binding, and decreased cell wall turnover and detergent-induced autolysis. Increases in daptomycin MICs correlated with decreased daptomycin binding. Intracellular activity was weak (E(max) <1 log(10) CFU decrease) for vancomycin against all isolates, and for daptomycin against isolates with MICs >1 mg/L. Among all antibiotics tested, only quinupristin-dalfopristin and oritavancin provided close to bactericidal intracellular activities (1.6-2.5 log(10) CFU decreases at C(max)). Determination of the intracellular susceptibility of S. aureus, combined with improved methods of diagnosis, could be useful when dealing with persistent staphylococcal infections and could improve therapy.
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Affiliation(s)
- S Lemaire
- Unité de Pharmacologie cellulaire et moléculaire, Université catholique de Louvain, Bruxelles, Belgium
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44
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Topical Fusidic Acid for Treatment of Clostridium perfringens Keratitis. Cornea 2008; 27:959-60. [DOI: 10.1097/ico.0b013e31816f62a8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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45
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Vankerckhoven V, Huys G, Vancanneyt M, Snauwaert C, Swings J, Klare I, Witte W, Van Autgaerden T, Chapelle S, Lammens C, Goossens H. Genotypic diversity, antimicrobial resistance, and virulence factors of human isolates and probiotic cultures constituting two intraspecific groups of Enterococcus faecium isolates. Appl Environ Microbiol 2008; 74:4247-55. [PMID: 18487397 PMCID: PMC2493176 DOI: 10.1128/aem.02474-07] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2007] [Accepted: 05/10/2008] [Indexed: 11/20/2022] Open
Abstract
The intraspecific relationships among a collection of Enterococcus faecium isolates comprising probiotic cultures and human clinical isolates were investigated through the combined use of two high-resolution DNA-fingerprinting techniques. In addition, the incidences of antimicrobial resistance and virulence traits were investigated. A total of 128 E. faecium isolates from human clinical or nonclinical sources or used as probiotic cultures were subjected to fluorescent amplified fragment length polymorphism (FAFLP) fingerprinting and pulsed-field gel electrophoresis (PFGE) analysis of SmaI macrorestriction patterns. Susceptibilities to 16 antimicrobial agents were tested using broth microdilution, and the presence of the corresponding resistance genes was investigated using PCR. Multiplex PCR was used to detect the presence of the enterococcal virulence genes asa1, gelE, cylA, esp, and hyl. The results of the study showed that two intraspecific genomic groups (I and II) were obtained in FAFLP analysis. PFGE analysis demonstrated high variability within these two groups but also indicated that some probiotic cultures were indistinguishable and that a number of clinical isolates may be reisolations of commercial probiotic cultures. Compared to group II, which contained the majority of the probiotic isolates and fewer human clinical isolates, higher phenotypic and genotypic resistance frequencies were observed in group I. Two probiotic isolates were phenotypically resistant to erythromycin, one of which contained an erm(B) gene that was not transferable to enterococcal recipients. None of the probiotic E. faecium isolates demonstrated the presence of the tested virulence genes. The previously reported observation that E. faecium consists of two intraspecific genomic groups was further substantiated by FAFLP fingerprinting of 128 isolates. In combination with antimicrobial resistance and virulence testing, this grouping might represent an additional criterion in assessing the safety of new potential probiotic E. faecium isolates.
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Affiliation(s)
- Vanessa Vankerckhoven
- Laboratory of Medical Microbiology, Vaccine and Infectious Disease Institute, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium.
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Pharmacodynamic studies of vancomycin, metronidazole and fusidic acid against Clostridium difficile. Chemotherapy 2007; 53:267-74. [PMID: 17595541 DOI: 10.1159/000104471] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2005] [Accepted: 05/02/2006] [Indexed: 01/11/2023]
Abstract
BACKGROUND Pharmacodynamic studies of antibiotics have attracted great interest in recent years. However, studies on the pharmacodynamics of different antibiotics against Clostridium difficile are scarce. METHODS The postantibiotic effects (PAE) and the postantibiotic sub-minimum inhibitory concentration (MIC) effects (PA SME) of vancomycin, metronidazole and fusidic acid were investigated by viable counts against three different strains of C. difficile. The killing rate and extent of the three antibiotics against the same strains were also studied by adding 2, 4, 8, 16 and 32x MIC of the three antibiotics, respectively. RESULTS Metronidazole exerted a very rapid bactericidal effect at concentrations of 8x MIC and above against all three strains investigated. Vancomycin gave overall less kill in comparison to metronidazole and was bacteriostatic against two of the three strains. Fusidic acid exerted a concentration-dependent killing against two of the strains. Vancomycin exerted short PAEs and PA SMEs against all three strains. Significantly longer PAEs and PA SMEs were noted for fusidic acid. Metronidazole gave similar short PAEs like vancomycin but longer PA SMEs were noted against two of the investigated strains. CONCLUSION Metronidazole exerted the most prominent bactericidal effect greater than fusidic acid and greater than vancomycin. Fusidic acid gave overall the longest PAEs and PA SMEs greater than metronidazole and greater than vancomycin.
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Rittenhouse S, Singley C, Hoover J, Page R, Payne D. Use of the surgical wound infection model to determine the efficacious dosing regimen of retapamulin, a novel topical antibiotic. Antimicrob Agents Chemother 2006; 50:3886-8. [PMID: 17065626 PMCID: PMC1635196 DOI: 10.1128/aac.00183-06] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
The effect of topically applied retapamulin ointment was evaluated using various dosing regimens in the Staphylococcus aureus and Streptococcus pyogenes wound infection model. Retapamulin (1%, wt/wt) was efficacious using twice-daily (b.i.d.) applications for 4 or 5 days. These data underpinned the decision to evaluate 1% retapamulin b.i.d. in clinical trials.
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Affiliation(s)
- Stephen Rittenhouse
- Department of Microbiology Research, MMPD CEDD, GlaxoSmithKline Pharmaceuticals, 1250 S. Collegeville Rd, Collegeville, PA 19426-0989, USA.
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Doughty MJ, Dutton GN. Fusidic acid viscous eyedrops - an evaluation of pharmacodynamics, pharmacokinetics and clinical use for UK optometrists. Ophthalmic Physiol Opt 2006; 26:343-61. [PMID: 16792734 DOI: 10.1111/j.1475-1313.2006.00416.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Recent changes in UK law have allowed UK-based optometrists to sell and supply fusidic acid viscous eyedrops, providing it is in the course of their professional activity and in an emergency. Alternatively, the optometrist may access fusidic acid viscous eyedrops, for a named patient, using a written order supplied to a pharmacy. This review provides details of the legal background to these changes, examines the common causes of a bacterial conjunctivitis, examines the mechanism of action of this narrow spectrum antibiotic as a bacteriostatic agent, reviews the susceptibility of common ocular isolates of bacteria to the drug and presents details of the expected pharmacokinetics of the viscous eyedrops. From this perspective, a systematic review is provided of the clinical studies which have investigated the use of fusidic acid viscous eyedrops and their outcome. The indicated use is generally for the treatment of bacterial conjunctivitis and/or blepharoconjunctivitis, especially that caused by Staphylococcus, but not Streptococcus or Haemophilus sp. (more likely associated with concurrent nasopharyngeal infections). The usual regimen for use is twice daily for 5-10 days, depending on severity, and can initially be used more intensively (four times per day). It may also be used for the management of corneal and conjunctival abrasions and foreign body injuries, or some cases of chronic blepharitis.
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Affiliation(s)
- Michael J Doughty
- Department of Vision Sciences, Glasgow Caledonian University, Glasgow, UK.
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Falck E, Hautala JT, Karttunen M, Kinnunen PKJ, Patra M, Saaren-Seppälä H, Vattulainen I, Wiedmer SK, Holopainen JM. Interaction of fusidic acid with lipid membranes: Implications to the mechanism of antibiotic activity. Biophys J 2006; 91:1787-99. [PMID: 16782792 PMCID: PMC1544291 DOI: 10.1529/biophysj.106.084525] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
We have studied the effects of cholesterol and steroid-based antibiotic fusidic acid (FA) on the behavior of lipid bilayers using a variety of experimental techniques together with atomic-scale molecular dynamics simulations. Capillary electrophoretic measurements showed that FA was incorporated into fluid 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine membranes. Differential scanning calorimetry in turn showed that FA only slightly altered the thermodynamic properties of 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) bilayers, whereas cholesterol abolished all endotherms when the mole fraction of cholesterol (X(chol)) was >0.20. Fluorescence spectroscopy was then used to further characterize the influence of these two steroids on DPPC large unilamellar vesicles. In the case of FA, our result strongly suggested that FA was organized into lateral microdomains with increased water penetration into the membrane. For cholesterol/DPPC mixtures, fluorescence spectroscopy results were compatible with the formation of the liquid-ordered phase. A comparison of FA and cholesterol-induced effects on DPPC bilayers through atomistic molecular dynamics simulations showed that both FA and cholesterol tend to order neighboring lipid chains. However, the ordering effect of FA was slightly weaker than that of cholesterol, and especially for deprotonated FA the difference was significant. Summarizing, our results show that FA is readily incorporated into the lipid bilayer where it is likely to be enriched into lateral microdomains. These domains could facilitate the association of elongation factor-G into lipid rafts in living bacteria, enhancing markedly the antibiotic efficacy of FA.
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Affiliation(s)
- Emma Falck
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
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50
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Neut D, Hendriks JGE, van Horn JR, Kowalski RSZ, van der Mei HC, Busscher HJ. Antimicrobial efficacy of gentamicin-loaded acrylic bone cements with fusidic acid or clindamycin added. J Orthop Res 2006; 24:291-9. [PMID: 16435362 DOI: 10.1002/jor.20058] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The increasing gentamicin resistance among bacteria in septic joint arthroplasty has stimulated interest in adding a second antibiotic into gentamicin-loaded bone cement. A first aim of this in vitro study is to investigate whether addition of fusidic acid or clindamycin to gentamicin-loaded bone cement has an additional antimicrobial effect against a collection of 38 clinical isolates, including 16 gentamicin-resistant strains. A modified Kirby-Bauer test, involving measurement of the inhibition zone around antibiotic-loaded bone cement discs on agar plates, was used to investigate whether adding a second antibiotic has an additional antimicrobial effect. Second, a selected number of strains was used to study their survival in an interfacial gap made in the different bone cements to mimic the gap between bone and cement as existing near a prosthesis. Gentamicin-loaded bone cement had an antimicrobial activity against 58% of the 38 bacterial strains included in this study, while 68% of the strains were affected by bone cement loaded with a combination of gentamicin and clindamycin. Bone cement loaded with the combination of gentamicin and fusidic acid had antimicrobial activity against 87% of the bacterial strains. In the prosthesis-related gap model, there was a clear trend toward less bacterial survival for gentamicin-loaded bone cement after adding clindamycin or fusidic acid. Addition of clindamycin or fusidic acid into gentamicin-loaded bone cement yields an additional antimicrobial effect. The combination gentamicin and fusidic acid was effective against a higher number of clinical isolates than the combination of gentamicin with clindamycin, including gentamicin-resistant strains.
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Affiliation(s)
- Daniëlle Neut
- Department of Orthopedic Surgery, University Medical Center Groningen, and University of Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands.
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