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Selg C, Grell T, Brakel A, Andrews PC, Hoffmann R, Hey-Hawkins E. Fusing Bismuth and Mercaptocarboranes: Design and Biological Evaluation of Low-Toxicity Antimicrobial Thiolato Complexes. Chempluschem 2024; 89:e202300759. [PMID: 38263504 DOI: 10.1002/cplu.202300759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 01/19/2024] [Accepted: 01/23/2024] [Indexed: 01/25/2024]
Abstract
This study proposes an innovative strategy to enhance the pharmacophore model of antimicrobial bismuth thiolato complex drugs by substituting hydrocarbon ligand structures with boron clusters, particularly icosahedral closo-dicarbadodecaborane (C2B10H12, carboranes). The hetero- and homoleptic mercaptocarborane complexes BiPh2L (1) and BiL3 (2) (L=9-S-1,2-C2B10H11) were prepared from 9-mercaptocarborane (HL) and triphenylbismuth. Comprehensive characterization using NMR, IR, MS, and XRD techniques confirmed their successful synthesis. Evaluation of antimicrobial activity in a liquid broth microdilution assay demonstrated micromolar to submicromolar minimum inhibitory concentrations (MIC) suggesting high effectiveness against S. aureus and limited efficacy against E. coli. This study highlights the potential of boron-containing bismuth complexes as promising antimicrobial agents, especially targeting Gram-positive bacteria, thus contributing to the advancement of novel therapeutic approaches.
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Affiliation(s)
- Christoph Selg
- Institute of Bioanalytical Chemistry, Centre for Biotechnology and Biomedicine, Leipzig University, Deutscher Platz 5, 04103, Leipzig, Germany
| | - Toni Grell
- Department of Chemistry, University of Milano, Via Camillo Golgi 19, 20133, Milano, Italy
| | - Alexandra Brakel
- Institute of Bioanalytical Chemistry, Centre for Biotechnology and Biomedicine, Leipzig University, Deutscher Platz 5, 04103, Leipzig, Germany
| | - Philip C Andrews
- School of Chemistry, Monash University, Clayton, 3800, Melbourne, VIC, Australia
| | - Ralf Hoffmann
- Institute of Bioanalytical Chemistry, Centre for Biotechnology and Biomedicine, Leipzig University, Deutscher Platz 5, 04103, Leipzig, Germany
| | - Evamarie Hey-Hawkins
- Institute of Bioanalytical Chemistry, Centre for Biotechnology and Biomedicine, Leipzig University, Deutscher Platz 5, 04103, Leipzig, Germany
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Exploring Possible Ways to Enhance the Potential and Use of Natural Products through Nanotechnology in the Battle against Biofilms of Foodborne Bacterial Pathogens. Pathogens 2023; 12:pathogens12020270. [PMID: 36839543 PMCID: PMC9967150 DOI: 10.3390/pathogens12020270] [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: 12/29/2022] [Revised: 01/30/2023] [Accepted: 02/01/2023] [Indexed: 02/10/2023] Open
Abstract
Biofilms enable pathogenic bacteria to survive in unfavorable environments. As biofilm-forming pathogens can cause rapid food spoilage and recurrent infections in humans, especially their presence in the food industry is problematic. Using chemical disinfectants in the food industry to prevent biofilm formation raises serious health concerns. Further, the ability of biofilm-forming bacterial pathogens to tolerate disinfection procedures questions the traditional treatment methods. Thus, there is a dire need for alternative treatment options targeting bacterial pathogens, especially biofilms. As clean-label products without carcinogenic and hazardous potential, natural compounds with growth and biofilm-inhibiting and biofilm-eradicating potentials have gained popularity as natural preservatives in the food industry. However, the use of these natural preservatives in the food industry is restricted by their poor availability, stability during food processing and storage. Also there is a lack of standardization, and unattractive organoleptic qualities. Nanotechnology is one way to get around these limitations and as well as the use of underutilized bioactives. The use of nanotechnology has several advantages including traversing the biofilm matrix, targeted drug delivery, controlled release, and enhanced bioavailability, bioactivity, and stability. The nanoparticles used in fabricating or encapsulating natural products are considered as an appealing antibiofilm strategy since the nanoparticles enhance the activity of the natural products against biofilms of foodborne bacterial pathogens. Hence, this literature review is intended to provide a comprehensive analysis of the current methods in nanotechnology used for natural products delivery (biofabrication, encapsulation, and nanoemulsion) and also discuss the different promising strategies employed in the recent and past to enhance the inhibition and eradication of foodborne bacterial biofilms.
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Neamati F, Kodori M, Feizabadi MM, Abavisani M, Barani M, Khaledi M, Moghadaszadeh M, Azadbakht MK, Zeinali M, Fathizadeh H. Bismuth nanoparticles against microbial infections. Nanomedicine (Lond) 2022; 17:2109-2122. [PMID: 36786392 DOI: 10.2217/nnm-2022-0153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023] Open
Abstract
The destructive effect of infectious diseases on human life and the emergence of antibiotic-resistant strains highlight the importance of developing new and appropriate treatment strategies, one of which is the use of metals as therapeutic agents. Bismuth nanoparticles are an example of prominent metal-containing drugs. The therapeutic effects of bismuth-based drugs in the treatment of wounds have been proven. Various laboratory studies have confirmed the antimicrobial effects of bismuth nanoparticles, including the clinical treatment of ulcers caused by Helicobacter pylori. Therefore, considering the performance of this nanoparticle and its potent effect on infectious agents and its therapeutic dimensions, the present study fully investigated the properties and performance of this metal-based nanoparticle.
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Affiliation(s)
- Foroogh Neamati
- Department of Microbiology & Immunology, Kashan University of Medical Sciences, Kashan, 8713187591, I.R. Iran
| | - Mansoor Kodori
- Noncommunicable Diseases Research Center, Bam University of Medical Sciences, Bam, 7661635596, Iran
| | - Mohammad Mehdi Feizabadi
- Department of Microbiology, School of Medicine, Tehran University of Medical Sciences, Tehran, 1497911982, Iran
| | - Mohammad Abavisani
- Department of Microbiology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, 1338663157, Iran
| | - Mohammad Barani
- Department of Chemistry, Shahid Bahonar University of Kerman, Kerman, 7616714954, Iran
| | - Mansoor Khaledi
- Department of Microbiology, Faculty of Medicine, Shahed University, Tehran, 1113614581, Iran
| | - Masoud Moghadaszadeh
- Biotechnology Research Center, Tabriz University of Medical Science, Tabriz, 5145773478, Iran
| | | | - Mojdeh Zeinali
- Department of Basic Sciences, Sirjan School of Medical Sciences, Sirjan, 7818647, Iran
| | - Hadis Fathizadeh
- Student Research Committee, Sirjan School of Medical Sciences, Sirjan, 7818647787, Iran
- Department of Laboratory Sciences, Sirjan School of Medical Sciences, Sirjan, 7818647787, Iran
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Lyczko K, Lyczko M, Banasiewicz M, Wegrzynska K, Ziółko A, Baraniak A, Dobrowolski JC. Thallium(I) Tropolonates: Synthesis, Structure, Spectral Characteristics, and Antimicrobial Activity Compared to Lead(II) and Bismuth(III) Analogues. Molecules 2021; 27:molecules27010183. [PMID: 35011415 PMCID: PMC8746424 DOI: 10.3390/molecules27010183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 12/27/2021] [Accepted: 12/27/2021] [Indexed: 11/16/2022] Open
Abstract
Synthesis, single-crystal X-ray determination diffraction and FT-IR, NMR (1H, 13C, 19F and 205Tl), UV–vis, and luminescence spectra characteristics were described for series of thallium(I) compounds: thallium(I) triflate (Tl(OTf)), 1:1 co-crystals of thallium(I) triflate and tropolone (Htrop), Tl(OTf)·Htrop, as well as simple thallium(I) chelates: Tl(trop) (1), Tl(5-metrop) (2), Tl(hino) (3), with Htrop, 5-methyltropolone (5-meHtrop), 4-isopropyltropolone (hinokitiol, Hhino), respectively, and additionally more complex {Tl@[Tl(hino)]6}(OTf) (4) compound. Comparison of their antimicrobial activity with selected lead(II) and bismuth(III) analogs and free ligands showed that only bismuth(III) complexes demonstrated significant antimicrobial activity, from two- to fivefold larger than the free ligands.
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Affiliation(s)
- Krzysztof Lyczko
- Institute of Nuclear Chemistry and Technology, Dorodna 16, 03-195 Warsaw, Poland; (M.L.); (J.C.D.)
- Correspondence:
| | - Monika Lyczko
- Institute of Nuclear Chemistry and Technology, Dorodna 16, 03-195 Warsaw, Poland; (M.L.); (J.C.D.)
| | | | - Karolina Wegrzynska
- National Medicines Institute, Chełmska 30/34, 00-725 Warsaw, Poland; (K.W.); (A.Z.); (A.B.)
| | - Anna Ziółko
- National Medicines Institute, Chełmska 30/34, 00-725 Warsaw, Poland; (K.W.); (A.Z.); (A.B.)
| | - Anna Baraniak
- National Medicines Institute, Chełmska 30/34, 00-725 Warsaw, Poland; (K.W.); (A.Z.); (A.B.)
| | - Jan Cz. Dobrowolski
- Institute of Nuclear Chemistry and Technology, Dorodna 16, 03-195 Warsaw, Poland; (M.L.); (J.C.D.)
- National Medicines Institute, Chełmska 30/34, 00-725 Warsaw, Poland; (K.W.); (A.Z.); (A.B.)
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Susceptibility to Bismuth(III) of Aquaculture Bacterial Pathogens: Effectiveness of Bismuth-Deferiprone Therapy against Vibrio anguillarum Infection in Fish. Microorganisms 2021; 9:microorganisms9112399. [PMID: 34835524 PMCID: PMC8622636 DOI: 10.3390/microorganisms9112399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 11/19/2021] [Accepted: 11/19/2021] [Indexed: 11/17/2022] Open
Abstract
Bismuth is a heavy metal with antibacterial properties that has a long history of medicinal use. The results reported here suggest that bismuth(III) (chelated with deferiprone) could be used in aquaculture systems to treat bacterial disease outbreaks, greatly reducing antibiotic use. We tested bismuth susceptibility in a collection of aquaculture bacterial pathogens. In the presence of bismuth concentrations ranging from 1.3 to 13 µM, most bacteria started showing a drastic decrease in their growth ability, although with high inter- and intraspecific variability. The minimal inhibitory concentrations of bismuth ranged from 13 to more than 780 µM, depending on bacterial species and strain. The results of in vivo assays suggest that low concentrations of bismuth could be especially effective to treat vibriosis caused by Vibrio anguillarum, since bismuth greatly reduced mortality in experimentally infected fish without any observable side effects. A bismuth therapy, alone or combined with other antimicrobials, could contribute to reduce the use of antibiotics in aquaculture.
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Griffith DM, Li H, Werrett MV, Andrews PC, Sun H. Medicinal chemistry and biomedical applications of bismuth-based compounds and nanoparticles. Chem Soc Rev 2021; 50:12037-12069. [PMID: 34533144 DOI: 10.1039/d0cs00031k] [Citation(s) in RCA: 64] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Bismuth as a relatively non-toxic and inexpensive metal with exceptional properties has numerous biomedical applications. Bismuth-based compounds are used extensively as medicines for the treatment of gastrointestinal disorders including dyspepsia, gastric ulcers and H. pylori infections. Recently, its medicinal application was further extended to potential treatments of viral infection, multidrug resistant microbial infections, cancer and also imaging, drug delivery and biosensing. In this review we have highlighted the unique chemistry and biological chemistry of bismuth-209 as a prelude to sections covering the unique antibacterial activity of bismuth including a description of research undertaken to date to elucidate key molecular mechanisms of action against H. pylori, the development of novel compounds to treat infection from microbes beyond H. pylori and the significant role bismuth compounds can play as resistance breakers. Furthermore we have provided an account of the potential therapeutic application of bismuth-213 in targeted alpha therapy as well as a summary of the biomedical applications of bismuth-based nanoparticles and composites. Ultimately this review aims to provide the state of the art, highlight the untapped biomedical potential of bismuth and encourage original contributions to this exciting and important field.
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Affiliation(s)
- Darren M Griffith
- Department of Chemistry, Royal College of Surgeons in Ireland, 123 St. Stephens Green, Dublin 2, Ireland.,SSPC, Synthesis and Solid State Pharmaceutical Centre, Ireland
| | - Hongyan Li
- Department of Chemistry and CAS-HKU Joint Laboratory of Metallomics for Health and Environment, The University of Hong Kong, Pokfulam Road, Hong Kong, China.
| | | | - Philip C Andrews
- School of Chemistry, Monash University, Melbourne, VIC, Australia
| | - Hongzhe Sun
- Department of Chemistry and CAS-HKU Joint Laboratory of Metallomics for Health and Environment, The University of Hong Kong, Pokfulam Road, Hong Kong, China.
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Maliha M, Tan B, Wong K, Miri S, Brammananth R, Coppel RL, Werrett M, Andrews PC, Batchelor W. Bismuth phosphinato incorporated antibacterial filter paper for drinking water disinfection. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127167] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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8
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Vazquez-Munoz R, Arellano-Jimenez MJ, Lopez-Ribot JL. Bismuth nanoparticles obtained by a facile synthesis method exhibit antimicrobial activity against Staphylococcus aureus and Candida albicans. BMC Biomed Eng 2020; 2:11. [PMID: 33073175 PMCID: PMC7558697 DOI: 10.1186/s42490-020-00044-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Accepted: 09/08/2020] [Indexed: 01/08/2023] Open
Abstract
Background Bismuth compounds are known for their activity against multiple microorganisms; yet, the antibiotic properties of bismuth nanoparticles (BiNPs) remain poorly explored. The objective of this work is to further the research of BiNPs for nanomedicine-related applications. Stable Polyvinylpyrrolidone (PVP)-coated BiNPs were produced by a chemical reduction process, in less than 30 min. Results We produced stable, small, spheroid PVP-coated BiNPs with a crystalline organization. The PVP-BiNPs showed potent antibacterial activity against the pathogenic bacterium Staphylococcus aureus and antifungal activity against the opportunistic pathogenic yeast Candida albicans, both under planktonic and biofilm growing conditions. Conclusions Our results indicate that BiNPs represent promising antimicrobial nanomaterials, and this facile synthetic method may allow for further investigation of their activity against a variety of pathogenic microorganisms.
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Yi N, Jiang ZJ, Wang L, Luo P, Peng F. Crystal structure and anti-breast cancer activity evaluation of a nanosized bismuth(V)-containing coordination complex based on the F-decorated ligand. INORG NANO-MET CHEM 2020. [DOI: 10.1080/24701556.2020.1722693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Nian Yi
- Department of Breast and Thyroid Surgery, Affiliated Nanhua Hospital, University of South China, Hengyang, Hunan, China
| | - Zhong-Jun Jiang
- Department of Breast and Thyroid Surgery, Affiliated Nanhua Hospital, University of South China, Hengyang, Hunan, China
| | - Li Wang
- Department of Breast and Thyroid Surgery, Affiliated Nanhua Hospital, University of South China, Hengyang, Hunan, China
| | - Ping Luo
- Department of Breast and Thyroid Surgery, Affiliated Nanhua Hospital, University of South China, Hengyang, Hunan, China
| | - Fei Peng
- Department of Pharmacy, People’s Hospital of Chongqing, Chongqing, China
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Herdman ME, Werrett MV, Duffin RN, Stephens LJ, Brammananth R, Coppel RL, Batchelor W, Andrews PC. Impact of structural changes in heteroleptic bismuth phosphinates on their antibacterial activity in Bi-nanocellulose composites. Dalton Trans 2020; 49:7341-7354. [PMID: 32392274 DOI: 10.1039/d0dt01226b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
To study and evaluate the effect of ligand choice and distribution in bismuth phosphinates on toxicity and antibacterial activity, a series of novel diphenyl mono-phosphinato bismuth complexes, [BiPh2(O(O[double bond, length as m-dash])P(H)Ph)] 1, [BiPh2(O(O[double bond, length as m-dash])PPh2)] 2, [BiPh2(O(O[double bond, length as m-dash])PMe2)] 3 and [BiPh2(O(O[double bond, length as m-dash])P(p-MeOPh)2)] 4, were synthesised, characterised and structurally authenticated by X-ray crystallography. Evaluation of their antibacterial activity towards Staphylococcus aureus (S. aureus), methicillin-resistant S. aureus (MRSA), vancomycin-resistant Enterococci (VRE), Escherichia coli (E. coli) and Pseudomonas aeruginosa (P. aeruginosa) showed all four mono-phosphinato bismuth complexes to be highly active. However, unlike their less soluble bis-phosphinato analogues, they displayed an increased level of toxicity towards mammalian cells (COS-7, human and murine fibroblasts), where it was shown the complexes disrupt cellular membranes leading to cytotoxicity. The mono-phosphinato bismuth complexes were used to produce antibacterial nanocellulose composites. Leaching studies showed that complex 1 had the highest levels of leaching, at 15% of the total available bismuth when the composite was soaked in water. The aqueous leachates of 1 were bacteriostatic towards MRSA and VRE at concentrations between 4.0 and 4.6 μM, while being bactericidal towards E. coli above 2.8 μM. At similar concentrations the complex showed toxicity towards human fibroblast cells, with cell viability reduced to 2% (1, 2.4 μM). The possibility to control leaching of the bismuth complexes from cellulose composites through structural changes is evidence for their potential application in antibacterial surfaces and materials.
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Affiliation(s)
- Megan E Herdman
- School of Chemistry, Monash University, Clayton, Melbourne, VIC 3800, Australia.
| | - Melissa V Werrett
- School of Chemistry, Monash University, Clayton, Melbourne, VIC 3800, Australia.
| | - Rebekah N Duffin
- School of Chemistry, Monash University, Clayton, Melbourne, VIC 3800, Australia.
| | - Liam J Stephens
- School of Chemistry, Monash University, Clayton, Melbourne, VIC 3800, Australia.
| | - Rajini Brammananth
- Department of Microbiology, Monash University, Clayton, Melbourne, VIC 3800, Australia
| | - Ross L Coppel
- Department of Microbiology, Monash University, Clayton, Melbourne, VIC 3800, Australia
| | - Warren Batchelor
- Bioresource Processing Research Institute of Australia (BioPRIA), Department of Chemical Engineering, Monash University, Clayton, Melbourne, VIC 3800, Australia
| | - Philip C Andrews
- School of Chemistry, Monash University, Clayton, Melbourne, VIC 3800, Australia.
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Stephens LJ, Munuganti S, Moran TH, Duffin RN, Werrett MV, Andrews PC. Is Bismuth Really the "Green" Metal? Exploring the Antimicrobial Activity and Cytotoxicity of Organobismuth Thiolate Complexes. Inorg Chem 2020; 59:3494-3508. [PMID: 32129066 DOI: 10.1021/acs.inorgchem.9b03550] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Antimicrobial resistance is becoming an ever-increasing threat for human health. Metal complexes and, in particular, those that incorporate bismuth offer an attractive alternative to the typically used organic compounds to which bacteria are often able to develop resistance determinants. Herein we report the synthesis, characterization, and biological evaluation of a series of homo- and heteroleptic bismuth(III) thiolates incorporating either one (BiPh2L), two (BiPhL2), or three (BiL3) sulfur-containing azole ligands where LH = tetrazolethiols or triazolethiols (thiones). Despite bismuth typically being considered a nontoxic heavy metal, we demonstrate that the environment surrounding the metal center has a clear influence on the safety of bismuth-containing complexes. In particular, heteroleptic thiolate complexes (BiPh2L and BiPhL2) display strong antibacterial activity yet are also nonselectively cytotoxic to mammalian cells. Interestingly, the homoleptic thiolate complexes (BiL3) were shown to be completely inactive toward both bacterial and mammalian cells. Further biological analysis of the complexes revealed the first insights into the biological mode of action of these particular bismuth thiolates. Scanning electron microscopy images of methicillin-resistant Staphylococcus aureus (MRSA) cells have revealed that the cell membrane is the likely target site of action for bismuth thiolates against bacterial cells. This points toward a nonspecific mode of action that is likely to contribute to the poor selectivity's demonstrated by the bismuth thiolate complexes in vitro. Uptake studies suggest that reduced cellular uptake could explain the marked difference in activity between the homo- and heteroleptic complexes.
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Affiliation(s)
- Liam J Stephens
- Monash University School of Chemistry, Clayton, Victoria 3800, Australia
| | | | | | - Rebekah N Duffin
- Monash University School of Chemistry, Clayton, Victoria 3800, Australia
| | - Melissa V Werrett
- Monash University School of Chemistry, Clayton, Victoria 3800, Australia
| | - Philip C Andrews
- Monash University School of Chemistry, Clayton, Victoria 3800, Australia
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12
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Wang R, Li H, Ip TKY, Sun H. Bismuth drugs as antimicrobial agents. Med Chem 2020. [DOI: 10.1016/bs.adioch.2019.10.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Vazquez-Munoz R, Arellano-Jimenez MJ, Lopez-Ribot JL. Bismuth nanoparticles obtained by a facile synthesis method exhibit antimicrobial activity against Staphylococcus aureus and Candida albicans. BMC Biomed Eng 2020. [PMID: 33073175 DOI: 10.1101/2020.06.05.137109] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/15/2023] Open
Abstract
BACKGROUND Bismuth compounds are known for their activity against multiple microorganisms; yet, the antibiotic properties of bismuth nanoparticles (BiNPs) remain poorly explored. The objective of this work is to further the research of BiNPs for nanomedicine-related applications. Stable Polyvinylpyrrolidone (PVP)-coated BiNPs were produced by a chemical reduction process, in less than 30 min. RESULTS We produced stable, small, spheroid PVP-coated BiNPs with a crystalline organization. The PVP-BiNPs showed potent antibacterial activity against the pathogenic bacterium Staphylococcus aureus and antifungal activity against the opportunistic pathogenic yeast Candida albicans, both under planktonic and biofilm growing conditions. CONCLUSIONS Our results indicate that BiNPs represent promising antimicrobial nanomaterials, and this facile synthetic method may allow for further investigation of their activity against a variety of pathogenic microorganisms.
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14
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Duffin RN, Werrett MV, Andrews PC. Antimony and bismuth as antimicrobial agents. Med Chem 2020. [DOI: 10.1016/bs.adioch.2019.10.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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15
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Senevirathna DC, Duffin RN, Stephens LJ, Herdman ME, Werrett MV, Andrews PC. Bismuth(III) Thiophosphinates: Understanding How a Small Atomic Change Influences Antibacterial Activity and Mammalian Cell Viability. Aust J Chem 2020. [DOI: 10.1071/ch20169] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Diphenylphosphinothioic acid (HSP(=O)Ph2) and diphenylphosphinodithioic acid (HSP(=S)Ph2) have been used to synthesise four BiIII complexes: 1 [Bi(SP(=O)Ph2)3], 2 [BiPh(SP(=O)Ph2)2], 3 [BiPh2(SP(=O)Ph2)], and 4 [Bi(SP(=S)Ph2)3], using BiPh3 and [Bi(OtBu)3] as bismuth sources. The complexes have been characterised by NMR spectroscopy, mass spectrometry, infrared spectroscopy, powder X-ray diffraction, and singe crystal X-ray crystallography (2–4). Biological studies indicated that despite complexes 2 and 3 reducing mammalian cell viability, their antibacterial activity provides a good degree of selectivity towards both Gram positive and Gram negative bacterial strains. The minimum inhibitory concentrations for complexes 2 and 3 are in the range of 0.52–5.5µM towards the bacteria tested. Homoleptic complexes 1 and 4 were generally less active towards both bacterial and mammalian cells.
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Andleeb S, Imtiaz‐ud‐Din, Rauf MK, Azam SS, Haq I, Tahir MN, Ahmad S. Bioactive Heteroleptic Bismuth(V) Complexes: Synthesis, Structural Analysis and Binding Pattern Validation. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.5061] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Sohaila Andleeb
- Department of ChemistryQuaid‐i‐Azam University Islamabad 45320 Pakistan
| | - Imtiaz‐ud‐Din
- Department of ChemistryQuaid‐i‐Azam University Islamabad 45320 Pakistan
| | - Muhammad Khawar Rauf
- Office of Research, Innovation and CommercializationQuaid‐I‐Azam University Islamabad 45320 Pakistan
| | - Syed Sikander Azam
- Computational Biology Lab, National Center for BioinformaticsQuaid‐i‐Azam University Islamabad 45320 Pakistan
| | - Ihsan‐ul Haq
- Department of PharmacyQuaid‐i‐Azam University Islamabad 45320 Pakistan
| | | | - Sajjad Ahmad
- Computational Biology Lab, National Center for BioinformaticsQuaid‐i‐Azam University Islamabad 45320 Pakistan
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Helicobacter pylori Biofilm Formation and Its Potential Role in Pathogenesis. Microbiol Mol Biol Rev 2018; 82:82/2/e00001-18. [PMID: 29743338 DOI: 10.1128/mmbr.00001-18] [Citation(s) in RCA: 99] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Despite decades of effort, Helicobacter pylori infections remain difficult to treat. Over half of the world's population is infected by H. pylori, which is a major cause of duodenal and gastric ulcers as well as gastric cancer. During chronic infection, H. pylori localizes within the gastric mucosal layer, including deep within invaginations called glands; thanks to its impressive ability to survive despite the harsh acidic environment, it can persist for the host's lifetime. This ability to survive and persist in the stomach is associated with urease production, chemotactic motility, and the ability to adapt to the fluctuating environment. Additionally, biofilm formation has recently been suggested to play a role in colonization. Biofilms are surface-associated communities of bacteria that are embedded in a hydrated matrix of extracellular polymeric substances. Biofilms pose a substantial health risk and are key contributors to many chronic and recurrent infections. This link between biofilm-associated bacteria and chronic infections likely results from an increased tolerance to conventional antibiotic treatments as well as immune system action. The role of this biofilm mode in antimicrobial treatment failure and H. pylori survival has yet to be determined. Furthermore, relatively little is known about the H. pylori biofilm structure or the genes associated with this mode of growth. In this review, therefore, we aim to highlight recent findings concerning H. pylori biofilms and the molecular mechanism of their formation. Additionally, we discuss the potential roles of biofilms in the failure of antibiotic treatment and in infection recurrence.
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Mofazzal Jahromi MA, Sahandi Zangabad P, Moosavi Basri SM, Sahandi Zangabad K, Ghamarypour A, Aref AR, Karimi M, Hamblin MR. Nanomedicine and advanced technologies for burns: Preventing infection and facilitating wound healing. Adv Drug Deliv Rev 2018; 123:33-64. [PMID: 28782570 PMCID: PMC5742034 DOI: 10.1016/j.addr.2017.08.001] [Citation(s) in RCA: 250] [Impact Index Per Article: 41.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Revised: 07/20/2017] [Accepted: 08/01/2017] [Indexed: 12/11/2022]
Abstract
According to the latest report from the World Health Organization, an estimated 265,000 deaths still occur every year as a direct result of burn injuries. A widespread range of these deaths induced by burn wound happens in low- and middle-income countries, where survivors face a lifetime of morbidity. Most of the deaths occur due to infections when a high percentage of the external regions of the body area is affected. Microbial nutrient availability, skin barrier disruption, and vascular supply destruction in burn injuries as well as systemic immunosuppression are important parameters that cause burns to be susceptible to infections. Topical antimicrobials and dressings are generally employed to inhibit burn infections followed by a burn wound therapy, because systemic antibiotics have problems in reaching the infected site, coupled with increasing microbial drug resistance. Nanotechnology has provided a range of molecular designed nanostructures (NS) that can be used in both therapeutic and diagnostic applications in burns. These NSs can be divided into organic and non-organic (such as polymeric nanoparticles (NPs) and silver NPs, respectively), and many have been designed to display multifunctional activity. The present review covers the physiology of skin, burn classification, burn wound pathogenesis, animal models of burn wound infection, and various topical therapeutic approaches designed to combat infection and stimulate healing. These include biological based approaches (e.g. immune-based antimicrobial molecules, therapeutic microorganisms, antimicrobial agents, etc.), antimicrobial photo- and ultrasound-therapy, as well as nanotechnology-based wound healing approaches as a revolutionizing area. Thus, we focus on organic and non-organic NSs designed to deliver growth factors to burned skin, and scaffolds, dressings, etc. for exogenous stem cells to aid skin regeneration. Eventually, recent breakthroughs and technologies with substantial potentials in tissue regeneration and skin wound therapy (that are as the basis of burn wound therapies) are briefly taken into consideration including 3D-printing, cell-imprinted substrates, nano-architectured surfaces, and novel gene-editing tools such as CRISPR-Cas.
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Affiliation(s)
- Mirza Ali Mofazzal Jahromi
- Department of Advanced Medical Sciences & Technologies, School of Medicine, Jahrom University of Medical Sciences (JUMS), Jahrom, Iran; Research Center for Noncommunicable Diseases, School of Medicine, Jahrom University of Medical Sciences (JUMS), Jahrom, Iran
| | - Parham Sahandi Zangabad
- Research Center for Pharmaceutical Nanotechnology (RCPN), Tabriz University of Medical Science (TUOMS), Tabriz, Iran; Cellular and Molecular Research Center, Iran University of Medical Sciences, Tehran, Iran; Bio-Nano-Interfaces: Convergence of Sciences (BNICS), Universal Scientific Education and Research Network (USERN), Tehran, Iran; Department of Medical Nanotechnology, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Seyed Masoud Moosavi Basri
- Bio-Nano-Interfaces: Convergence of Sciences (BNICS), Universal Scientific Education and Research Network (USERN), Tehran, Iran; Bioenvironmental Research Center, Sharif University of Technology, Tehran, Iran; Civil & Environmental Engineering Department, Shahid Beheshti University, Tehran, Iran
| | - Keyvan Sahandi Zangabad
- Bio-Nano-Interfaces: Convergence of Sciences (BNICS), Universal Scientific Education and Research Network (USERN), Tehran, Iran; Department of Polymer Engineering, Sahand University of Technology, PO Box 51335-1996, Tabriz, Iran; Nanomedicine Research Association (NRA), Universal Scientific Education and Research Network (USERN), Tehran, Iran
| | - Ameneh Ghamarypour
- Bio-Nano-Interfaces: Convergence of Sciences (BNICS), Universal Scientific Education and Research Network (USERN), Tehran, Iran; Department of Biology, Science and Research Branch, Islamic Azad university, Tehran, Iran
| | - Amir R Aref
- Department of Medical Oncology, Belfer Center for Applied Cancer Science, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02215, USA
| | - Mahdi Karimi
- Cellular and Molecular Research Center, Iran University of Medical Sciences, Tehran, Iran; Department of Medical Nanotechnology, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, Iran; Research Center for Science and Technology in Medicine, Tehran University of Medical Sciences, Tehran, Iran; Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, Boston, USA.
| | - Michael R Hamblin
- Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, Boston, USA; Department of Dermatology, Harvard Medical School, Boston, USA; Harvard-MIT Division of Health Sciences and Technology, Cambridge, USA.
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Hernandez-Delgadillo R, Del Angel-Mosqueda C, Solís-Soto JM, Munguia-Moreno S, Pineda-Aguilar N, Sánchez-Nájera RI, Chellam S, Cabral-Romero C. Antimicrobial and antibiofilm activities of MTA supplemented with bismuth lipophilic nanoparticles. Dent Mater J 2017; 36:503-510. [PMID: 28420830 DOI: 10.4012/dmj.2016-259] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The objective of this work was to determine the antimicrobial and antibiofilm properties of mineral trioxide aggregate (MTA) supplemented with bismuth lipophilic nanoparticles (BisBAL NPs). The antimicrobial activity of the composite MTA-BisBAL NPs was determined by the disk diffusion assay, while antibiofilm activity was analyzed by fluorescence microscopy. The cytotoxicity of MTA-BisBAL NPs was determined on human gingival fibroblasts by optical microscopy and crystal violet staining. MTA-BisBAL NPs inhibited the growth of Enterococcus faecalis, Escherichia coli, and Candida albicans and also detached the biofilm of fluorescent E. faecalis after 24 h of treatment. The addition of BisBAL nanoparticles did not significantly modify the physical properties of MTA, and cytotoxicity was not observed when MTA-BisBAL NPs was added on human gingival fibroblasts. Altogether these results suggest that BisBAL nanoparticles provide antimicrobial and antibiofilm activities to MTA while it retained their biophysical properties without cause side effects on human gingival fibroblasts.
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Affiliation(s)
| | | | | | - Silvia Munguia-Moreno
- Odontological Sciences, School of Stomatology, Autonomous University of San Luis Potosi
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Abstract
INTRODUCTION/BACKGROUND Xeroform® is a petrolatum-based fine mesh gauze containing 3% bismuth tribromophenate. Bismuth, similar to other metals, has antimicrobial properties. Xeroform® has been used for decades in burn and plastic surgery as a donor site dressing and as a covering for wounds or partial thickness burns. Despite this, the antimicrobial spectrum of Xeroform® remains largely unknown. We examined the in-vitro efficacy of Xeroform® against common burn pathogens using zone-of-inhibition methodology in a commercial research facility. METHODS/DESIGN Pure strains of 15 common burn pathogens including Methicillin-resistant Staphylococcus aureus (MRSA), Methicillin-sensitive Staphylococcus aureus (MSSA), Staphylococcus epidermidis, Pseudomonas aeruginosa, Enterobacter cloacae, Escherichia coli, Candida albicans, Vancomycin resistant Enterococcus, Acinetobacter baumennii, Klebsiella pneumonia, Extended spectrum beta-lactamase producing Klebsiella, Beta hemolytic Streptococcus pyogenes, Proteus mirabilis, Serratia marcescens, and Salmonella enterica ssp. Enterica were inoculated at a strength of 106-1010 CFU/ml onto appropriate agar plates. A sterile 1 in2 Xeroform® square was placed in the center of each plate, and the Zone of Inhibition (ZOI) was measured following 18-24h of incubation at 37°C. A second bismuth pharmaceutical (bismuth subsalicylate, Pepto-Bismol®) was then tested using the same methodology against the same strains of MRSA, MSSA, E. coli, K. pneumonia and S. marcescens. Finally, 3% w/v bismuth tribromophenate in glycerol suspension was tested against 13 burn pathogens for antimicrobial activity independent of the Xeroform® dressing by measure of Zone of Inhibition. RESULTS/FINDINGS For Xeroform®, none of the fifteen pathogens had a measurable zone of inhibition on any plate. Bismuth subsalicylate showed a zone of inhibition for MSSA in 3 plates (mean of 47.2mm), in one of three plates for MRSA (13.8mm), and in one of three plates for S. marcesens (89.6mm). There was no zone of inhibition seen for K. pneumonia or E. coli. Bismuth tribromophenate, when not bound to Xeroform® showed activity against 12 of 13 pathogens. CONCLUSIONS/IMPLICATIONS While bismuth subsalicylate, and bismuth tribromophenate unbound to Xeroform® demonstrate antimicrobial activity, it appears that Xeroform® dressings do not. The utility of Xeroform® in burn medicine may relate more to use as an impervious dressing than to antimicrobial effect. Donor sites are clean surgical wounds and clean partial thickness burns may have minimal colonization present. In such circumstances, an inactive and impervious dressing may be all that is necessary to promote wound healing.
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Mahdiun F, Mansouri S, Khazaeli P, Mirzaei R. The effect of tobramycin incorporated with bismuth-ethanedithiol loaded on niosomes on the quorum sensing and biofilm formation of Pseudomonas aeruginosa. Microb Pathog 2017; 107:129-135. [DOI: 10.1016/j.micpath.2017.03.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Revised: 03/02/2017] [Accepted: 03/16/2017] [Indexed: 10/19/2022]
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Shin S, Ahmed I, Hwang J, Seo Y, Lee E, Choi J, Moon S, Hong JW. A Microfluidic Approach to Investigating a Synergistic Effect of Tobramycin and Sodium Dodecyl Sulfate on Pseudomonas aeruginosa Biofilms. ANAL SCI 2016; 32:67-73. [PMID: 26753708 DOI: 10.2116/analsci.32.67] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
In recent years, a microfluidic technology has contributed a significant role in biological research, specifically for the study of biofilms. Bacterial biofilms are a source of infections and contamination in the environment due to an extra polymeric matrix. Inadequate uses of antibiotics make the bacterial biofilms antibiotic resistant. Therefore, it is important to determine the effective concentration of antibiotics in order to eliminate bacterial biofilms. The present microfluidic study was carried out to analyze the activities of tobramycin and sodium dodecyl sulfate (SDS) against Pseudomonas aeruginosa biofilms with a continuous flow in order to achieve a greater delivery of the agents. The results show that a co-treatment of tobramycin and SDS significantly reduced the biomass of biofilms (by more than 99%) after 24 h. Tobramycin and SDS killed and detached bacteria in the cores of biofilms. Evidently, our data suggest that a microchannel would be effective for both quantitative and qualitative evaluations in order to test combinatorial effect of drugs and chemicals on a complexed biological system including biofilm.
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Affiliation(s)
- Soojeong Shin
- Department of Bionano Engineering, Hanyang University
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Current Trends in Development of Liposomes for Targeting Bacterial Biofilms. Pharmaceutics 2016; 8:pharmaceutics8020018. [PMID: 27231933 PMCID: PMC4932481 DOI: 10.3390/pharmaceutics8020018] [Citation(s) in RCA: 105] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Revised: 05/17/2016] [Accepted: 05/18/2016] [Indexed: 12/26/2022] Open
Abstract
Biofilm targeting represents a great challenge for effective antimicrobial therapy. Increased biofilm resistance, even with the elevated concentrations of very potent antimicrobial agents, often leads to failed therapeutic outcome. Application of biocompatible nanomicrobials, particularly liposomally-associated nanomicrobials, presents a promising approach for improved drug delivery to bacterial cells and biofilms. Versatile manipulations of liposomal physicochemical properties, such as the bilayer composition, membrane fluidity, size, surface charge and coating, enable development of liposomes with desired pharmacokinetic and pharmacodynamic profiles. This review attempts to provide an unbiased overview of investigations of liposomes destined to treat bacterial biofilms. Different strategies including the recent advancements in liposomal design aiming at eradication of existing biofilms and prevention of biofilm formation, as well as respective limitations, are discussed in more details.
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Hathroubi S, Mekni MA, Domenico P, Nguyen D, Jacques M. Biofilms: Microbial Shelters Against Antibiotics. Microb Drug Resist 2016; 23:147-156. [PMID: 27214143 DOI: 10.1089/mdr.2016.0087] [Citation(s) in RCA: 92] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Biofilms are communities of aggregated bacterial cells embedded in a self-produced extracellular polymeric matrix. Biofilms are recalcitrant to antibiotic treatment and immune defenses and are implicated in many chronic bacterial and fungal infections. In this review, we provide an overview of the contribution of biofilms to persistent infections resistant to antibiotic treatment, the impact of multispecies biofilms on drug resistance and tolerance, and recent advances in the development of antibiofilm agents. Understanding the mechanisms of antibiotic resistance and tolerance in biofilms is essential for developing new preventive and therapeutic strategies and curbing drug resistance.
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Affiliation(s)
- Skander Hathroubi
- 1 Department of Pathology and Microbiology, Faculty of Veterinary Medicine, Université de Montréal , Montréal, Canada
| | - Mohamed A Mekni
- 2 The National Bone Marrow Transplant Centre , UR12ES02, Faculty of Medicine, Tunis, Tunisia
| | | | - Dao Nguyen
- 4 Meakins Christie Laboratories, Department of Medicine, Research Institute of the McGill University Health Centre , Montréal, Canada
| | - Mario Jacques
- 1 Department of Pathology and Microbiology, Faculty of Veterinary Medicine, Université de Montréal , Montréal, Canada
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Luqman A, Blair VL, Brammananth R, Crellin PK, Coppel RL, Andrews PC. The Importance of Heterolepticity in Improving the Antibacterial Activity of Bismuth(III) Thiolates. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600076] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Ahmad Luqman
- School of ChemistryMonash University3800Clayton, MelbourneVICAustralia
| | - Victoria L. Blair
- School of ChemistryMonash University3800Clayton, MelbourneVICAustralia
| | - Rajini Brammananth
- Department of MicrobiologyMonash University3800Clayton, MelbourneVICAustralia
| | - Paul K. Crellin
- Department of MicrobiologyMonash University3800Clayton, MelbourneVICAustralia
| | - Ross L. Coppel
- Department of MicrobiologyMonash University3800Clayton, MelbourneVICAustralia
| | - Philip C. Andrews
- School of ChemistryMonash University3800Clayton, MelbourneVICAustralia
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Reshamwala SMS, Mamidipally C, Pissurlenkar RRS, Coutinho EC, Noronha SB. Evaluation of risedronate as an antibiofilm agent. J Med Microbiol 2016; 65:9-18. [DOI: 10.1099/jmm.0.000193] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Affiliation(s)
- Shamlan M. S. Reshamwala
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai, India
| | | | - Raghuvir R. S. Pissurlenkar
- Molecular Simulations Group, Department of Pharmaceutical Chemistry, Goa College of Pharmacy, , Panaji, India
| | - Evans C. Coutinho
- Department of Pharmaceutical Chemistry, Bombay College of Pharmacy, , Mumbai, India
| | - Santosh B. Noronha
- Department of Chemical Engineering, Indian Institute of Technology Bombay, Mumbai, India
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Cui L, Bi C, Fan Y, Li X, Meng X, Zhang N, Zhang Z. Synthesis, crystal structures, DNA interaction and anticancer activity of organobismuth(V) complexes. Inorganica Chim Acta 2015. [DOI: 10.1016/j.ica.2015.07.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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New Technology: Heparin and Antimicrobial-Coated Catheters. J Vasc Access 2015; 16 Suppl 9:S48-53. [DOI: 10.5301/jva.5000376] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/11/2015] [Indexed: 11/20/2022] Open
Abstract
Although tunneled hemodialysis catheter must be considered the last option for vascular access, it is necessary in some circumstances in the dialysis patient. Thrombosis and infections are the main causes of catheter-related comorbidity. Fibrin sheath, intimately related with the biofilm, is the precipitating factor of this environment, determining catheter patency and patient morbidity. Its association with bacterial overgrowth and thrombosis has led to the search of multiple preventive measures. Among them is the development of catheter coatings to prevent thrombosis and infections. There are two kinds of treatments to cover the catheter surface: antithrombotic and antimicrobial coatings. In nondialysis-related settings, mainly in intensive care units, both have been shown to be efficient in the prevention of catheter-related infection. This includes heparin, silver, chlorhexidine, rifampicine and minocycline. In hemodialysis population, however, few studies on surface-treated catheters have been made and they do not provide evidence that shows complication reduction. The higher effectiveness of coatings in nontunneled catheters may depend on the short average life of these devices. Hemodialysis catheters need to be used over long periods of time and require clinical trials to show effectiveness of coatings over long periods. This also means greater knowledge of biofilm etiopathogeny and fibrin sheath development.
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Abstract
OBJECTIVE This proof-of-concept study tested the hypothesis that combining bismuth thiols (BTs) with systemic antibiotics will more effectively reduce infection in an animal model of contaminated open fracture than systemic antibiotics alone. METHODS An implant-stabilized segmental defect rat model was contaminated with Staphylococcus aureus and then treated with surgical debridement 6 hours after injury and 3 days of systemic cefazolin. A single dose of BTs suspended in a hydrogel was administered to the wound immediately after debridement. After 14 days, the bone and implant were harvested for microbiological analysis. RESULTS A single local dose of 0.05 mg of BT (MB-8-2), when combined with systemically administered cefazolin, decreased infection, without any noticeable local or systemic toxicity, from 60% to 10% (P = 0.002), with only 0.02% of the recovered bacteria quantity of the cefazolin-only group (P < 0.001). Higher doses were less effective and caused side-effects. CONCLUSIONS BTs administered locally to infected open fracture wounds at an appropriate dose potentiate the effect of systemically administered antibiotics and reduce infection rate and bacteria quantity associated with bone and orthopaedic implants. Local delivery of BTs is a promising strategy for increasing the efficacy of systemically administered antibiotics in preventing and treating infections of open fractures.
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Luqman A, Blair VL, Brammananth R, Crellin PK, Coppel RL, Kedzierski L, Andrews PC. Homoleptic and Heteroleptic Bismuth(III) Thiazole-Thiolates and the Influence of Ring Substitution on Their Antibacterial and Antileishmanial Activity. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201402958] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Sharma BK, Saha A, Rahaman L, Bhattacharjee S, Tribedi P. Silver Inhibits the Biofilm Formation of <i>Pseudomonas aeruginosa</i>. ACTA ACUST UNITED AC 2015. [DOI: 10.4236/aim.2015.510070] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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32
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Nanomedicines for antimicrobial interventions. J Hosp Infect 2014; 88:183-90. [DOI: 10.1016/j.jhin.2014.09.009] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2013] [Accepted: 09/10/2014] [Indexed: 11/18/2022]
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Luqman A, Blair VL, Brammananth R, Crellin PK, Coppel RL, Andrews PC. Homo- and heteroleptic bismuth(III/V) thiolates from N-heterocyclic thiones: synthesis, structure and anti-microbial activity. Chemistry 2014; 20:14362-77. [PMID: 25224757 DOI: 10.1002/chem.201404109] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2014] [Indexed: 12/28/2022]
Abstract
Homo- and heteroleptic bismuth thiolato complexes have been synthesised and characterised from biologically relevant tetrazole-, imidazole-, thiadiazole- and thiazole-based heterocyclic thiones (thiols): 1-methyl-1H-tetrazole-5-thiol (1-MMTZ(H)); 4-methyl-4H-1,2,4-triazole-3-thiol (4-MTT(H)); 1-methyl-1H-imidazole-2-thiol (2-MMI(H)); 5-methyl-1,3,4-thiadiazole-2-thiol (5-MMTD(H)); 1,3,4-thiadiazole-2-dithiol (2,5-DMTD(H)2 ); and 4-(4-bromophenyl)thiazole-2-thiol (4-BrMTD(H)). Reaction of BiPh3 with 1-MMTZ(H) produced the rare Bi(V) thiolato complex [BiPh(1-MMTZ)4 ], which undergoes reduction in DMSO to give [BiPh(1-MMTZ)2 {(1-MMTZ(H)}2 ]. Reactions with PhBiCl2 or BiPh3 generally produced monophenylbismuth thiolates, [BiPh(SR)2 ]. The crystal structures of [BiPh(1-MMTZ)2 {1-MMTZ(H)}2 ], [BiPh(5-MMTD)2 ], [BiPh{2,5-DMTD(H)}2 (Me2 CO)] and [Bi(4-BrMTD)3 ] were obtained. Evaluation of the bactericidal properties against M. smegmatis, S. aureus, MRSA, VRE, E. faecalis and E. coli showed complexes containing the anionic ligands 1- MMTZ, 4-MTT and 4-BrMTD to be most effective. The dithiolato dithione complexes [BiPh(4-MTT)2 {4-MTT(H)}2 ] and [BiPh(1-MMTZ)2 {1-MMTZ(H)}2 ] were most effective against all the bacteria: MICs 0.34 μM for [BiPh(4-MTT)2 {4-MTT(H)}2 ] against VRE, and 1.33 μM for [BiPh(1-MMTZ)2 {1-MMTZ(H)}2 ] against M. smegmatis and S. aureus. Tris-thiolato Bi(III) complexes were least effective overall. All complexes showed little or no toxicity towards mammalian COS-7 cells at 20 μg mL(-1) .
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Affiliation(s)
- Ahmad Luqman
- School of Chemistry, Monash University, Clayton, Melbourne, VIC 3800 (Australia)
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Antibacterial properties of metal and metalloid ions in chronic periodontitis and peri-implantitis therapy. Acta Biomater 2014; 10:3795-810. [PMID: 24704700 DOI: 10.1016/j.actbio.2014.03.028] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2013] [Revised: 03/07/2014] [Accepted: 03/26/2014] [Indexed: 12/21/2022]
Abstract
Periodontal diseases like periodontitis and peri-implantitis have been linked with Gram-negative anaerobes. The incorporation of various chemotherapeutic agents, including metal ions, into several materials and devices has been extensively studied against periodontal bacteria, and materials doped with metal ions have been proposed for the treatment of periodontal and peri-implant diseases. The aim of this review is to discuss the effectiveness of materials doped with metal and metalloid ions already used in the treatment of periodontal diseases, as well as the potential use of alternative materials that are currently available for other applications but have been proved to be cytotoxic to the specific periodontal pathogens. The sources of this review included English articles using Google Scholar™, ScienceDirect, Scopus and PubMed. Search terms included the combinations of the descriptors "disease", "ionic species" and "bacterium". Articles that discuss the biocidal properties of materials doped with metal and metalloid ions against the specific periodontal bacteria were included. The articles were independently extracted by two authors using predefined data fields. The evaluation of resources was based on the quality of the content and the relevance to the topic, which was evaluated by the ionic species and the bacteria used in the study, while the final application was not considered as relevant. The present review summarizes the extensive previous and current research efforts concerning the use of metal ions in periodontal diseases therapy, while it points out the challenges and opportunities lying ahead.
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Varposhti M, Abdi Ali A, Mohammadi P. Synergistic Effects of Bismuth Thiols and Various Antibiotics Against Pseudomonas aeruginosa Biofilm. Jundishapur J Microbiol 2014; 7:e9142. [PMID: 25147686 PMCID: PMC4138659 DOI: 10.5812/jjm.9142] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2012] [Revised: 04/24/2013] [Accepted: 05/05/2013] [Indexed: 11/25/2022] Open
Abstract
Background: Pseudomonas aeruginosa is an opportunistic pathogen that takes advantages of some weaknesses in the immune system to initiate an infection. Biofilms of P. aeruginosa can cause chronic opportunistic infections in immunocompromised and elderly patients. This bacterium is considered as a model organism to study antibiotic resistance as well as biofilm formation. In the biofilm structures, bacteria are protected from many harmful environmental factors such as fluctuations in the level of oxygen and nutrients, and the alterations of pH as well as sensitivity to antibiotics. Decreased permeability of biofilms is one of the important reasons of antimicrobial resistance in bacteria. Objectives: In this study the anti-biofilm activity of bismuth thiols in combination with ciprofloxacin, imipenem and ceftazidime against the P. aeruginosa biofilm was investigated. Materials and Methods: Checkerboard method was used to test the susceptibility of biofilms against various antimicrobial combinations. The biofilm formation was measured by 2,3-bis (2-methoxy-4-nitro-5-sulfo-phenyl)-2H-tetrazolium-5-carboxanilide (XTT) colorimetric assay. The fractional bio-film inhibitory concentration was reported for each agent. Results: The combination of bismuth ethanedithiol with ciprofloxacin showed synergistic inhibitory effect on the P. aeruginosa biofilm formation. The combination of bismuth ethanedithiol ciprofloxacin, ceftazidime and imipenem showed synergistic inhibitory effects on the biofilm formation. Furthermore, the combination of bismuth ethanedithiol, imipenem and ceftazidime did not show any synergistic inhibitory effect on biofilm formation. Conclusions: Our studies show that using appropriate concentrations of bismuth thiols in combination with various antibiotics can act synergistically against P. aeruginosa biofilm formation.
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Affiliation(s)
- Maryam Varposhti
- Department of Biology, Faculty of Sciences, Alzahra University, Tehran, IR Iran
| | - Ahya Abdi Ali
- Department of Biology, Faculty of Sciences, Alzahra University, Tehran, IR Iran
- Corresponding author: Ahya Abdi Ali, Department of Biology, Faculty of Sciences, Alzahra University, Tehran, IR Iran. Tel: +98-9122182302, Fax: +98-88058912, E-mail:
| | - Parisa Mohammadi
- Department of Biology, Faculty of Sciences, Alzahra University, Tehran, IR Iran
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Raţ CI, Silvestru C, Breunig HJ. Hypervalent organoantimony and -bismuth compounds with pendant arm ligands. Coord Chem Rev 2013. [DOI: 10.1016/j.ccr.2012.07.026] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Stewart S, Barr S, Engiles J, Hickok NJ, Shapiro IM, Richardson DW, Parvizi J, Schaer TP. Vancomycin-modified implant surface inhibits biofilm formation and supports bone-healing in an infected osteotomy model in sheep: a proof-of-concept study. J Bone Joint Surg Am 2012; 94:1406-15. [PMID: 22854994 PMCID: PMC3401139 DOI: 10.2106/jbjs.k.00886] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND Implant-associated infections contribute to patient morbidity and health care costs. We hypothesized that surface modification of titanium fracture hardware with vancomycin would support bone-healing and prevent bacterial colonization of the implant in a large-animal model. METHODS A unilateral transverse mid-diaphyseal tibial osteotomy was performed and repaired with a titanium locking compression plate in nine sheep. Four control animals were treated with an unmodified plate and five experimental animals were treated with a vancomycin-modified plate. The osteotomy was inoculated with 2.5 × 106 colony-forming units of Staphylococcus aureus. The animals were killed at three months postoperatively, and implants were retrieved aseptically. Microbiologic and histologic analyses, scanning electron and confocal microscopy, and microcomputed tomography were performed. RESULTS All animals completed the study. Compared with the treatment cohort, control animals exhibited protracted lameness in the operatively treated leg. Gross findings during necropsy were consistent with an infected osteotomy accompanied by a florid and lytic callus. Microcomputed tomography and histologic analysis of the tibiae further supported the presence of septic osteomyelitis in the control cohort. Thick biofilms were also evident, and bacterial cultures were positive for Staphylococcus aureus in three of four control animals. In contrast, animals treated with vancomycin-treated plates exhibited a healed osteotomy site with homogenous remodeling, there was no evidence of biofilm formation on the retrieved plate, and bacterial cultures from only one of five animals were positive for Staphylococcus aureus. CONCLUSIONS Vancomycin-derivatized plate surfaces inhibited implant colonization with Staphylococcus aureus and supported bone-healing in an infected large-animal model.
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Affiliation(s)
- Suzanne Stewart
- Department of Clinical Studies, New Bolton Center, School of Veterinary Medicine, University of Pennsylvania, 382 West Street Road, Kennett Square, PA 19348. E-mail address for T.P. Schaer:
| | - Stephanie Barr
- Department of Orthopaedic Surgery, Thomas Jefferson University, 1015 Walnut Street, Curtis Building, Suite 501, Philadelphia, PA 19107
| | - Julie Engiles
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, 382 West Street Road, Kennett Square, PA 19348
| | - Noreen J. Hickok
- Department of Orthopaedic Surgery, Thomas Jefferson University, 1015 Walnut Street, Curtis Building, Suite 501, Philadelphia, PA 19107
| | - Irving M. Shapiro
- Department of Orthopaedic Surgery, Thomas Jefferson University, 1015 Walnut Street, Curtis Building, Suite 501, Philadelphia, PA 19107
| | - Dean W. Richardson
- Department of Clinical Studies, New Bolton Center, School of Veterinary Medicine, University of Pennsylvania, 382 West Street Road, Kennett Square, PA 19348. E-mail address for T.P. Schaer:
| | - Javad Parvizi
- The Rothman Institute, 925 Chestnut Street, Philadelphia, PA 19107
| | - Thomas P. Schaer
- Department of Clinical Studies, New Bolton Center, School of Veterinary Medicine, University of Pennsylvania, 382 West Street Road, Kennett Square, PA 19348. E-mail address for T.P. Schaer:
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Folsom JP, Baker B, Stewart PS. In vitro efficacy of bismuth thiols against biofilms formed by bacteria isolated from human chronic wounds. J Appl Microbiol 2011; 111:989-96. [PMID: 21794034 DOI: 10.1111/j.1365-2672.2011.05110.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
AIMS The purpose of this study was to evaluate the antimicrobial efficacy of thirteen bismuth thiol preparations for bactericidal activity against established biofilms formed by two bacteria isolated from human chronic wounds. METHODS Single species biofilms of a Pseudomonas aeruginosa or a methicillin-resistant Staphylococcus aureus were grown in either colony biofilm or drip-flow reactors systems. Biofilms were challenged with bismuth thiols, antibiotics or silver sulfadiazine, and log reductions were determined by plating for colony formation. CONCLUSIONS Antibiotics were ineffective or inconsistent against biofilms of both bacterial species tested. None of the antibiotics tested were able to achieve >2 log reductions in both biofilm models. The 13 different bismuth thiols tested in this investigation achieved widely varying degrees of killing, even against the same micro-organism in the same biofilm model. For each micro-organism, the best bismuth thiol easily outperformed the best conventional antibiotic. Against P. aeruginosa biofilms, bismuth-2,3-dimercaptopropanol (BisBAL) at 40-80 μg ml⁻¹ achieved > 7·7 mean log reduction for the two biofilm models. Against MRSA biofilms, bismuth-1,3-propanedithiol/bismuth-2-mercaptopyridine N-oxide (BisBDT/PYR) achieved a 4·9 log reduction. SIGNIFICANCE AND IMPACT OF THE STUDY Bismuth thiols are effective antimicrobial agents against biofilms formed by wound bacteria and merit further development as topical antiseptics for the suppression of biofilms in chronic wounds.
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Affiliation(s)
- J P Folsom
- Center for Biofilm Engineering, Montana State University, Bozeman, MT, USA Microbion Corporation, Bozeman, MT, USA
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Contribution of phosphoglucosamine mutase to determination of bacterial cell morphology in Streptococcus gordonii. Odontology 2011; 100:28-33. [PMID: 21567120 DOI: 10.1007/s10266-011-0026-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2010] [Accepted: 02/02/2011] [Indexed: 10/18/2022]
Abstract
Phosphoglucosamine mutase (GlmM; EC 5.4.2.10) catalyzes the interconversion of glucosamine-6-phosphate to glucosamine-1-phosphate, an essential step in the biosynthetic pathway leading to the formation of the peptidoglycan precursor uridine 5'-diphospho-N-acetylglucosamine. We have recently identified the gene (glmM) encoding the enzyme of Streptococcus gordonii, an early colonizer on the human tooth and an important cause of infective endocarditis, and indicated that the glmM mutation in S. gordonii appears to influence bacterial cell growth, morphology, and sensitivity to penicillins. Moreover, the glmM mutation results in increased sensitivity to polymorphonuclear leukocyte (PMN)-dependent killing. In the present study, we observed similarities in the utilization of sugar between the wild-type strain and the glmM mutant of S. gordonii when cultivated with medium containing 0.2% glucose, fructose, lactose, or sucrose. Morphological analyses clearly indicated that the glmM mutation causes marked elongation of the streptococcal chains, enlargement of bacterial cells, increased distortion of the bacterial cell surface, and defects in cell separation. These results suggest that mutations in glmM appear to influence bacterial cell growth and morphology, independent of the carbon source.
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Badireddy A, Chellam S. Bismuth dimercaptopropanol (BisBAL) inhibits formation of multispecies wastewater flocs. J Appl Microbiol 2011; 110:1426-37. [DOI: 10.1111/j.1365-2672.2011.05002.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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Ammons MCB. Anti-biofilm strategies and the need for innovations in wound care. ACTA ACUST UNITED AC 2010; 5:10-7. [PMID: 19807676 DOI: 10.2174/157489110790112581] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2009] [Accepted: 09/14/2009] [Indexed: 01/19/2023]
Abstract
With an aging and obese population, chronic wounds such as diabetic ulcers, pressure ulcers, and venous leg ulcers are of an increasingly relevant medical concern in the developed world. Identification of bacterial biofilm contamination as a major contributor to non-healing wounds demands biofilm-targeted strategies to treat chronic wounds. While the current standard of care has proven marginally effective, there are components of standard care that should remain part of the wound treatment regime including systemic and topical antibiotics, antiseptics, and physical debridement of biofilm and devitalized tissue. Emerging anti-biofilm strategies include novel, non-invasive means of physical debridement, chemical agent strategies, and biological agent strategies. While aging and obesity will continue to be major burdens to wound care, the emergence of wounds associated with war require investigation and biotechnology development to address biofilm strategies that manage multi-drug resistant bacteria contaminating the chronic wound. The article presents some of the recent patents related to anti-biofilm strategy in wound care.
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Affiliation(s)
- Mary C B Ammons
- Center for Biofilm Engineering, Montana State University, Bozeman, Montana 59717, USA.
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Schindler R, Heemann U, Haug U, Stoelck B, Karatas A, Pohle C, Deppisch R, Beck W, Hollenbeck M. Bismuth coating of non-tunneled haemodialysis catheters reduces bacterial colonization: a randomized controlled trial. Nephrol Dial Transplant 2010; 25:2651-6. [PMID: 20237055 PMCID: PMC2905443 DOI: 10.1093/ndt/gfq052] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Haemodialysis (HD) catheter-related blood stream infections are a major cause of morbidity and mortality in patients with acute and chronic renal failure. METHODS We conducted a randomized, prospective, double-blinded trial investigating the clinical value of bismuth-coated non-tunneled HD catheters in patients in need of temporary short-term vascular access. A standard catheter (SC) was compared to a surface-modified, bismuth-film-coated catheter (FCC). After removal of the catheter for any reason, both arterial and venous lumina were rinsed and the fluid cultured for detection of bacterial colony-forming units (CFU). The catheter tip was placed in a tube containing sterile saline, sonicated and shortly centrifuged to remove debris (3 min at 1000 g). The supernatant was cultured and assayed for DNA content. RESULTS Seventy-seven patients in three HD units were randomized. Thirteen patients suffered from acute renal failure, 60 patients from chronic renal failure, and four patients without renal insufficiency were treated with plasma exchange. The time to catheter removal was not significantly different between groups, with a mean of 18.5 +/- 2 days for SC and 15.1 +/- 2 days for FCC. In most cases, the reasons for catheter removal were related to no further need for extracorporeal therapy or establishment of a permanent vascular access. Six catheters for SC and four catheters for FCC were removed because of presumed infection. Bacterial colonization was significantly lower for coated catheters compared to standard catheters, both for cultured catheter tips as well as for CFU in rinse fluids (P < 0.05). CONCLUSIONS Surface modification with bismuth film reduces bacterial colonization of temporary non-tunneled HD catheters in a clinical trial. Larger trials with these modified catheters are justified to further investigate the effect on catheter-related infections, complications and costs.
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Affiliation(s)
- Ralf Schindler
- Department of Nephrology and Intensive Care Medicine, Charité-Virchow-Klinikum, Universitaetsmedizin zu Berlin, Berlin, Germany.
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Alipour M, Suntres ZE, Lafrenie RM, Omri A. Attenuation of Pseudomonas aeruginosa virulence factors and biofilms by co-encapsulation of bismuth-ethanedithiol with tobramycin in liposomes. J Antimicrob Chemother 2010; 65:684-93. [PMID: 20159770 DOI: 10.1093/jac/dkq036] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVES This study examined the activities of tobramycin and bismuth against quorum sensing, virulence factors and biofilms of Pseudomonas aeruginosa by co-encapsulating the agents in liposomes in order to achieve greater delivery of the agents. METHODS The inhibitory effects of the agents, in either their conventional (free) or vesicle-entrapped (liposomal) formulations, were assessed by measuring the changes in the quorum-sensing signal molecule N-acyl homoserine lactone, pyoverdine, pyocyanin, elastase, protease, chitinase, bacterial attachment and biofilms in vitro. RESULTS The effectiveness of tobramycin and bismuth was superior when they were co-administered as a liposomal formulation as measured by their ability to attenuate the production of N-acyl homoserine lactone, elastase (P < 0.01), protease (P < 0.05) and chitinase (P < 0.01). In the presence of non-lethal concentrations of free and liposomal tobramycin and bismuth, bacterial attachment was attenuated. Biofilm formation was also attenuated with free tobramycin and bismuth, yet, in the presence of liposomal tobramycin and bismuth, biofilm complexes could form but contained mostly dead bacteria. When established biofilms were treated with higher concentrations, free tobramycin and bismuth killed and detached bacteria, while the liposomal tobramycin and bismuth penetrated and killed bacteria in the cores of the biofilms. CONCLUSIONS These data suggest that treatment of P. aeruginosa with tobramycin and bismuth, as measured by the changes in quorum sensing, virulence factors and biofilms, is most effective when delivered as a liposomal formulation at a lower concentration compared with the free formulation.
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Affiliation(s)
- Misagh Alipour
- The Novel Drug & Vaccine Delivery Systems Facility, Department of Chemistry and Biochemistry, Laurentian University, Sudbury, Ontario, P3E 2C6, Canada
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Halwani M, Hebert S, Suntres ZE, Lafrenie RM, Azghani AO, Omri A. Bismuth–thiol incorporation enhances biological activities of liposomal tobramycin against bacterial biofilm and quorum sensing molecules production by Pseudomonas aeruginosa. Int J Pharm 2009; 373:141-6. [DOI: 10.1016/j.ijpharm.2009.02.001] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2008] [Revised: 01/27/2009] [Accepted: 02/02/2009] [Indexed: 11/28/2022]
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Le T, Psaltis A, Tan LW, Wormald PJ. The efficacy of topical antibiofilm agents in a sheep model of rhinosinusitis. ACTA ACUST UNITED AC 2009; 22:560-7. [PMID: 19178792 DOI: 10.2500/ajr.2008.22.3232] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
BACKGROUND Biofilms have been shown to be resistant to conventional antibiotic treatment. This study uses a sheep biofilm model developed by our department to investigate several novel topical anti-biofilm treatments. METHODS Staphylococcal biofilms were grown in 54 sheep frontal sinuses over 8 days: Each sinus was randomized to (1) no intervention, (2) single mupirocin flush, (3) regular 12-hourly mupirocin flushes for 5 days, (4) Citric Acid Zwitterionic Surfactant (CAZS) via hydrodebrider, (5) gallium nitrate, (6) CAZS with gallium nitrate, (7) CAZS with mupirocin, and (8) saline regular flushes. Sheep were sacrificed and the sinus mucosa harvested 1 or 8 days after treatment to assess treatment and any biofilm regrowth. Confocal scanning laser microscopy was used to confirm the presence or absence of biofilms, and the extent of biofilm reduction was quantitated using fluorescent in situ hybridization and colony forming unit counts. RESULTS In the control sheep biofilm coverage averaged 31.7%. Saline and mupirocin b.d. washes for 5 days had 23% and 0.84% coverage, respectively, when harvested on day 8. A single mupirocin and gallium wash had 7.7% and 16.2% on day 1 and 5.88% and 16.0% on day 8. CAZS with hydrodebrider had 6.66% on day 1 but 21.95% on day 8 whereas CAZS with hydodebrider and gallium had 13.3% on day 8. CONCLUSION This study shows that regular treatment with mupirocin produced the most marked reduction in biofilm surface area coverage (0.84% and 1.25%) with sustained effects over the 8-day follow-up period.
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Affiliation(s)
- Tong Le
- Department of Surgery-Otolaryngology Head and Neck Surgery, University of Adelaide, Adelaide, Australia
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Badireddy AR, Korpol BR, Chellam S, Gassman PL, Engelhard MH, Lea AS, Rosso KM. Spectroscopic Characterization of Extracellular Polymeric Substances from Escherichia coli and Serratia marcescens: Suppression Using Sub-Inhibitory Concentrations of Bismuth Thiols. Biomacromolecules 2008; 9:3079-89. [DOI: 10.1021/bm800600p] [Citation(s) in RCA: 98] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Appala Raju Badireddy
- Department of Civil and Environmental Engineering, University of Houston, Houston, Texas 77204-4003, Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204-4004, and Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352
| | - Bhoom Reddy Korpol
- Department of Civil and Environmental Engineering, University of Houston, Houston, Texas 77204-4003, Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204-4004, and Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352
| | - Shankararaman Chellam
- Department of Civil and Environmental Engineering, University of Houston, Houston, Texas 77204-4003, Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204-4004, and Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352
| | - Paul L. Gassman
- Department of Civil and Environmental Engineering, University of Houston, Houston, Texas 77204-4003, Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204-4004, and Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352
| | - Mark H. Engelhard
- Department of Civil and Environmental Engineering, University of Houston, Houston, Texas 77204-4003, Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204-4004, and Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352
| | - Alan S. Lea
- Department of Civil and Environmental Engineering, University of Houston, Houston, Texas 77204-4003, Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204-4004, and Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352
| | - Kevin M. Rosso
- Department of Civil and Environmental Engineering, University of Houston, Houston, Texas 77204-4003, Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204-4004, and Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352
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Shimazu K, Takahashi Y, Uchikawa Y, Shimazu Y, Yajima A, Takashima E, Aoba T, Konishi K. Identification of the Streptococcus gordonii glmM gene encoding phosphoglucosamine mutase and its role in bacterial cell morphology, biofilm formation, and sensitivity to antibiotics. ACTA ACUST UNITED AC 2008; 53:166-77. [PMID: 18462386 DOI: 10.1111/j.1574-695x.2008.00410.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Phosphoglucosamine mutase (EC 5.4.2.10) catalyzes the interconversion of glucosamine-6-phosphate into glucosamine-1-phosphate, an essential step in the biosynthetic pathway leading to the formation of peptidoglycan precursor uridine 5'-diphospho-N-acetylglucosamine. The gene (glmM) of Escherichia coli encoding the enzyme has been identified previously. We have now identified a glmM homolog in Streptococcus gordonii, an early colonizer on the human tooth and an important cause of infective endocarditis, and have confirmed that the gene encodes phosphoglucosamine mutase by assaying the enzymatic activity of the recombinant GlmM protein. Insertional glmM mutant of S. gordonii did not produce GlmM, and had a growth rate that was approximately half that of the wild type. Morphological analyses clearly indicated that the glmM mutation causes marked elongation of the streptococcal chains, enlargement of bacterial cells, and increased roughness of the bacterial cell surface. Furthermore, the glmM mutation reduces biofilm formation and increases sensitivity to penicillins relative to wild type. All of these phenotypic changes were also observed in a glmM deletion mutant, and were restored by the complementation with plasmid-borne glmM. These results suggest that, in S. gordonii, mutations in glmM appear to influence bacterial cell growth and morphology, biofilm formation, and sensitivity to penicillins.
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Affiliation(s)
- Kisaki Shimazu
- Department of Pediatric Dentistry, Nippon Dental University School of Life Dentistry at Tokyo, Tokyo, Japan
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The potential of lipid- and polymer-based drug delivery carriers for eradicating biofilm consortia on device-related nosocomial infections. J Control Release 2008; 128:2-22. [DOI: 10.1016/j.jconrel.2008.01.006] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2007] [Accepted: 01/08/2008] [Indexed: 11/23/2022]
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Halwani M, Blomme S, Suntres ZE, Alipour M, Azghani AO, Kumar A, Omri A. Liposomal bismuth-ethanedithiol formulation enhances antimicrobial activity of tobramycin. Int J Pharm 2008; 358:278-84. [PMID: 18448284 DOI: 10.1016/j.ijpharm.2008.03.008] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2008] [Revised: 03/04/2008] [Accepted: 03/08/2008] [Indexed: 10/22/2022]
Abstract
Pseudomonas aeruginosa and Burkholderia cenocepacia (formally, genomovar III genotype of Burkholderia cepacia complex) have emerged as serious opportunistic resistant pathogens in patients with cystic fibrosis (CF). We have developed a liposomal formulation containing bismuth-ethanedithiol (BiEDT) and tobramycin to overcome bacterial resistance. The stability of liposomal BiEDT-tobramycin (LipoBiEDT-TOB) was studied in phosphate buffered saline (PBS) and human pooled plasma at 4 and 37 degrees C. Minimal inhibitory concentrations (MICs) and minimal bactericidal concentrations (MBCs) for free tobramycin and LipoBiEDT-TOB against clinical isolates of P. aeruginosa and B. cenocepacia were determined by the broth dilution method. The toxicity profile and the influence on bacterial adhesion of LipoBiEDT-TOB formulation were determined using a human lung carcinoma cell line (A549). LipoBiEDT-TOB exhibited lower MICs than the conventional antibiotic (0.25mg/L vs. 1024 mg/L) and eradicated this highly resistant bacterial strain of P. aeruginosa (PA-48913) at very low concentrations (4 mg/L vs. 4096 mg/L). LipoBiEDT-TOB was significantly less toxic when compared to the free BiEDT, as evaluated by the MTT and LDH assay. The LipoBiEDT-TOB formulation suppressed bacterial adhesion (B. cenocepacia M13642R) to A549 cells. These data suggest that the novel LipoBiEDT-TOB drug delivery system could be utilized as a new strategy to enhance the efficacy of existing antibiotics against resistant organisms that commonly affect individuals with chronic lung infections.
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Affiliation(s)
- Majed Halwani
- The Novel Drug & Vaccine Delivery Systems Facility, Department of Chemistry and Biochemistry, Laurentian University, 935 Ramsey Lake Road, Sudbury, Ontario, Canada
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Badireddy AR, Chellam S, Yanina S, Gassman P, Rosso KM. Bismuth dimercaptopropanol (BisBAL) inhibits the expression of extracellular polysaccharides and proteins by Brevundimonas diminuta: implications for membrane microfiltration. Biotechnol Bioeng 2008; 99:634-43. [PMID: 17705249 DOI: 10.1002/bit.21615] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
A 2:1 molar ratio preparation of bismuth with a lipophilic dithiol (3-dimercapto-1-propanol, BAL) significantly reduced extracellular polymeric substances (EPS) expression by Brevundimonas diminuta in suspended cultures at levels just below the minimum inhibitory concentration (MIC). Total polysaccharides and proteins secreted by B. diminuta decreased by approximately 95% over a 5-day period when exposed to the bismuth-BAL chelate (BisBAL) at near MIC (12 microM). Fourier-transform infrared spectroscopy (FTIR) suggested that a possible mechanism of biofilm disruption by BisBAL is the inhibition of carbohydrate O-acetylation. FTIR also revealed extensive homology between EPS samples with and without BisBAL treatment, with proteins, polysaccharides, and peptides varying predominantly only in the amount expressed. EPS secretion decreased following BisBAL treatment as verified by atomic force microscopy and scanning electron microscopy. Without BisBAL treatment, a slime-like EPS matrix secreted by B. diminuta resulted in biofouling and inefficient hydrodynamic backwashing of microfiltration membranes.
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Affiliation(s)
- Appala Raju Badireddy
- Department of Civil and Environmental Engineering, University of Houston, 4800 Calhoun Road, Houston, Texas 77204-4003, USA
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