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Siddiqui A, Gul A, Khan H, Anjum F, Hussain T. Bio-inspired synthesis of silver nanoparticles using Salsola imbricataand its application as antibacterial additive in glass ionomer cement. NANOTECHNOLOGY 2024; 35:355101. [PMID: 38806018 DOI: 10.1088/1361-6528/ad50e4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Accepted: 05/28/2024] [Indexed: 05/30/2024]
Abstract
Nanotechnology has gained immense popularity and observed rapid development due to the remarkable physio-chemical properties of nanoparticles (NPs) and related nanomaterials. The green production of NPs has many benefits over traditional techniques because the current procedures are expensive, time-consuming, and involve harmful substances that limit their applicability. This study aimed to use a novel green source, theSalsola imbricata(SI) plant, which is commonly found in Central Asia and known for its medicinal properties as a reducing and stabilizing agent for the synthesis of AgNPs. The current study also utilized efficient statistical design, the Plackett-Burman Design (PBD) of Experiment method to synthesize the NPs. The characterization of NPs was carried out using UV-Vis spectroscopy, Fourier transform infrared spectroscopy, and scanning electron microscopy (SEM). The PBD results showed that only two out of four factorsi.e.AgNO3concentration and incubation time, were significant for the synthesis of SI-AgNPs. While remaining factors, incubation temperature and plant extract: AgNO3ratio were non-significant. The SEM analysis result showed that SI-AgNPs had a size of 20-50 nm. The SI-AgNPs demonstrated strong antibacterial activity against oral pathogens such asS. mutans and Lactobacillus acidophilus, with the highest efficacy observed at a concentration of 2 mg ml-1. The addition of SI-AgNPs in glass ionomer cement significantly increased the antibacterial activity of GIC againstS. mutans. Based on the results of the current study, the plant based AgNPs can be further evaluated in detail as alternate antimicrobial agent either alone or in combination with other antimicrobial agents for different dental applications.
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Affiliation(s)
- Anosha Siddiqui
- Dow College of Biotechnology, Dow University of Health Sciences, Karachi, Pakistan
| | - Anum Gul
- Dow College of Biotechnology, Dow University of Health Sciences, Karachi, Pakistan
| | - Hanzala Khan
- Dow College of Biotechnology, Dow University of Health Sciences, Karachi, Pakistan
| | - Fatima Anjum
- Dow Research Institute of Biotechnology and Biomedical Sciences, Dow University of Health Sciences, Karachi, Pakistan
| | - Tabassum Hussain
- Institute of Sustainable Halophyte Utilization, University of Karachi, Karachi, Pakistan
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Marković K, Kesić A, Novaković M, Grujović M, Simijonović D, Avdović EH, Matić S, Paunović M, Milutinović M, Nikodijević D, Stefanović O, Marković Z. Biosynthesis and characterization of silver nanoparticles synthesized using extracts of Agrimonia eupatoria L. and in vitro and in vivo studies of potential medicinal applications. RSC Adv 2024; 14:4591-4606. [PMID: 38318620 PMCID: PMC10839552 DOI: 10.1039/d3ra07819a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Accepted: 01/28/2024] [Indexed: 02/07/2024] Open
Abstract
This research explores the synthesis, characterization, and biological activities of silver nanoparticles (AgNPs) derived from acetone (AgNPs-acetone) and aqueous (AgNPs-H2O) extracts of Agrimonia eupatoria. The nanoparticles exhibit isometric morphology and uniform size distribution, as elucidated through Transmission Electron Microscopy (TEM) and high-resolution TEM (HRTEM) analyses. The utilization of Scanning Transmission Microscopy (STEM) with High-Angle Annular Dark-Field (HAADF) imaging and energy dispersive spectrometry (EDS) confirms the crystalline nature of AgNPs. Fourier Transform Infrared (FTIR) analysis reveals identical functional groups in the plant extracts and their corresponding AgNPs, suggesting the involvement of phytochemicals in the reduction of silver ions. Spectrophotometric monitoring of the synthesis process, influenced by various parameters, provides insights into the kinetics and optimal conditions for AgNP formation. The antioxidant activities of the plant extracts and synthesized AgNPs are evaluated through DPPH and ABTS methods, highlighting AgNPs-acetone as a potent antioxidant. Third-instar larvae exposed to the extracts have differential effects on DNA damage, with the acetone extract demonstrating antigenotoxic properties. Similarly, biosynthesized AgNPs-acetone displays antigenotoxic effects against EMS-induced DNA damage. The genotoxic effect of water extract and AgNPs-acetone was dose-dependent. Hemolytic potential is assessed on rat erythrocytes, revealing that low concentrations of AgNPs-acetone and AgNPs-H2O had a nontoxic effect on erythrocytes. Cytotoxicity assays demonstrate time-dependent and dose-dependent effects, with AgNPs-acetone exhibiting superior cytotoxicity. Proapoptotic activity is confirmed through apoptosis induction, emphasizing the potential therapeutic applications of AgNPs. The antimicrobial activity of AgNPs reveals concentration-dependent effects. AgNPs-H2O display better antibacterial activity, while antifungal activities are comparable between the two nanoparticle types.
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Affiliation(s)
- Katarina Marković
- University of Kragujevac, Institute for Information Technologies, Department of Science Jovana Cvijica bb 34000 Kragujevac Serbia
| | - Ana Kesić
- University of Kragujevac, Institute for Information Technologies, Department of Science Jovana Cvijica bb 34000 Kragujevac Serbia
| | - Mirjana Novaković
- University of Belgrade, Vinca Institute of Nuclear Sciences - National Institute of the Republic of Serbia, Department of Atomic Physics Belgrade Serbia
| | - Mirjana Grujović
- University of Kragujevac, Institute for Information Technologies, Department of Science Jovana Cvijica bb 34000 Kragujevac Serbia
| | - Dušica Simijonović
- University of Kragujevac, Institute for Information Technologies, Department of Science Jovana Cvijica bb 34000 Kragujevac Serbia
| | - Edina H Avdović
- University of Kragujevac, Institute for Information Technologies, Department of Science Jovana Cvijica bb 34000 Kragujevac Serbia
| | - Sanja Matić
- University of Kragujevac, Institute for Information Technologies, Department of Science Jovana Cvijica bb 34000 Kragujevac Serbia
| | - Milica Paunović
- University of Kragujevac, Faculty of Science, Department of Biology and Ecology Radoja Damjanovic 12 Kragujevac Serbia
| | - Milena Milutinović
- University of Kragujevac, Faculty of Science, Department of Biology and Ecology Radoja Damjanovic 12 Kragujevac Serbia
| | - Danijela Nikodijević
- University of Kragujevac, Faculty of Science, Department of Biology and Ecology Radoja Damjanovic 12 Kragujevac Serbia
| | - Olgica Stefanović
- University of Kragujevac, Faculty of Science, Department of Biology and Ecology Radoja Damjanovic 12 Kragujevac Serbia
| | - Zoran Marković
- University of Kragujevac, Institute for Information Technologies, Department of Science Jovana Cvijica bb 34000 Kragujevac Serbia
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Pajares-Chamorro N, Hernández-Escobar S, Wagley Y, Acevedo P, Cramer M, Badylak S, Hammer ND, Hardy J, Hankenson K, Chatzistavrou X. Silver-releasing bioactive glass nanoparticles for infected tissue regeneration. BIOMATERIALS ADVANCES 2023; 154:213656. [PMID: 37844416 DOI: 10.1016/j.bioadv.2023.213656] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 09/30/2023] [Accepted: 10/06/2023] [Indexed: 10/18/2023]
Abstract
Bacterial infections represent a formidable challenge, often leaving behind significant bone defects post-debridement and necessitating prolonged antibiotic treatments. The rise of antibiotic-resistant bacterial strains further complicates infection management. Bioactive glass nanoparticles have been presented as a promising substitute for bone defects and as carriers for therapeutic agents against microorganisms. Achieving consistent incorporation of ions into BGNs has proven challenging and restricted to a maximum ion concentration, especially when reducing the particle size. This study presents a notable achievement in the synthesis of 10 nm-sized Ag-doped bioactive glass nanoparticles (Ag-BGNs) using a modified yet straightforward Stöber method. The successful incorporation of essential elements, including P, Ca, Al, and Ag, into the glass structure at the intended concentrations (i.e., CaO wt% above 20 %) was confirmed by EDS, signifying a significant advancement in nanoscale biomaterial engineering. While exhibiting a spherical morphology and moderate dispersity, these nanoparticles tend to form submicron-sized aggregates outside of a solution state. The antibacterial effectiveness against MRSA was established across various experimental conditions, with Ag-BGNs effectively sterilizing planktonic bacteria without the need for antibiotics. Remarkably, when combined with oxacillin or fosfomycin, Ag-BGNs demonstrated a potent synergistic effect, restoring antibacterial capabilities against MRSA strains resistant to these antibiotics when used alone. Ag-BGNs exhibited potential in promoting human mesenchymal stromal cell proliferation, inducing the upregulation of osteoblast gene markers, and significantly contributing to bone regeneration in mice. This innovative synthesis protocol holds substantial promise for the development of biomaterials dedicated to the regeneration of infected tissue.
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Affiliation(s)
- Natalia Pajares-Chamorro
- Department of Chemical Engineering and Material Science, College of Engineering, Michigan State University, East Lansing, MI 48824, USA
| | - Sandra Hernández-Escobar
- Department of Chemical Engineering and Material Science, College of Engineering, Michigan State University, East Lansing, MI 48824, USA
| | - Yadav Wagley
- Department of Orthopaedic Surgery, University of Michigan Medical School, Ann Arbor, MI 48103, USA
| | - Parker Acevedo
- Department of Orthopaedic Surgery, University of Michigan Medical School, Ann Arbor, MI 48103, USA
| | - Madeline Cramer
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Stephen Badylak
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Neal D Hammer
- Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, MI 48824, USA
| | - Jonathan Hardy
- Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, MI 48824, USA; Institute for Quantitative Health Science and Engineering (IQ), Michigan State University, East Lansing, MI 48824, USA
| | - Kurt Hankenson
- Department of Orthopaedic Surgery, University of Michigan Medical School, Ann Arbor, MI 48103, USA
| | - Xanthippi Chatzistavrou
- Department of Chemical Engineering and Material Science, College of Engineering, Michigan State University, East Lansing, MI 48824, USA; Department of Chemical Engineering, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece.
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Dukka H, Taal MW, Bayston R. Potential clinical value of catheters impregnated with antimicrobials for the prevention of infections associated with peritoneal dialysis. Expert Rev Med Devices 2023; 20:459-466. [PMID: 37138535 PMCID: PMC11182215 DOI: 10.1080/17434440.2023.2205587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Accepted: 04/18/2023] [Indexed: 05/05/2023]
Abstract
INTRODUCTION Peritoneal dialysis (PD) is a widely used dialysis modality, which offers the advantage of being a home therapy but is associated with a risk of potentially serious infections, including exit site infection, catheter tunnel infection, and peritonitis that may result in morbidity, technique failure, and increased mortality. Catheters impregnated with antimicrobials hold promise as a novel technique to reduce PD associated infections. AREAS COVERED We describe PD modalities, catheters, technique, complications, and the microbiology of associated infections, as well as standard measures to reduce the risk of infection. A novel technique for the impregnation of silicone devices with antimicrobial agents has been used to produce antimicrobial impregnated ventricular shunt catheters with proven clinical efficacy that have now been adopted as the standard of care to reduce neurosurgical infections. Using the same technology, we have developed PD and urinary catheters impregnated with sparfloxacin, triclosan, and rifampicin. Safety and tolerability have been demonstrated in urinary catheters, and a similar study is planned in PD catheters. EXPERT OPINION Catheters impregnated with antimicrobials offer a simple technique to reduce PD associated infections and thereby enable more people to enjoy the advantages of PD. Clinical trials are needed to establish efficacy.
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Affiliation(s)
- Hari Dukka
- Consultant Nephrologist, Department of Renal Medicine, University Hospitals of Derby and Burton NHS Foundation Trust, Derby, UK
| | - Maarten W. Taal
- Consultant Nephrologist, Department of Renal Medicine, University Hospitals of Derby and Burton NHS Foundation Trust, Derby, UK
- Professor of Medicine, Centre for Kidney Research and Innovation, Academic Unit for Translational Medical Sciences, School of Medicine, University of Nottingham, Nottingham, UK
| | - Roger Bayston
- Emeritus Professor, Academic Unit for Injury, Repair and Inflammation Sciences, School of Medicine, University of Nottingham, Nottingham, UK
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Kayhan EY, Yildirim A, Kocer MB, Uysal A, Yilmaz M. A cellulose-based material as a fluorescent sensor for Cr(VI) detection and investigation of antimicrobial properties of its encapsulated form in two different MOFs. Int J Biol Macromol 2023; 240:124426. [PMID: 37060971 DOI: 10.1016/j.ijbiomac.2023.124426] [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: 02/24/2023] [Revised: 03/24/2023] [Accepted: 04/08/2023] [Indexed: 04/17/2023]
Abstract
It is crucial to detect toxic chromium ions quickly, reliably, sensitively and at low concentrations. In recent years, fluorescence-based methods have been developed for the rapid detection and determination of toxic ions such as chromium. In present work, we focused on the development of a cellulose-based fluorescent probe (Cel-Nap) for the determination of Cr(VI). The fluorescent probe bearing the 1,8-naphthalimide group displayed a low LOD of 1.07 μM for Cr(VI) in the working range of 0.33 × 10-5-3.22 × 10-5 M. The fluorescence and antibacterial properties of UiO-66-Cel-Nap and ZIF-8-Cel-Nap materials prepared by encapsulating Cel-Nap with 2 different MOF types (UiO-66 and ZIF-8) were investigated. While it was found that ZIF-8-based materials had better antimicrobial properties compared to those of UiO-66, it was determined that materials containing Ag+ were more effective against microbial than those containing AgNPs. It was found that the most effective material was ZIF-8-Cel-Nap-Ag+ and it had a significant antibacterial effect against E. coli at a MIC value of 0.0024 mg/mL.
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Affiliation(s)
| | - Ayse Yildirim
- Selcuk University, Faculty of Science, Department of Chemistry, Konya, Turkey
| | - Mustafa Baris Kocer
- Selcuk University, Faculty of Science, Department of Chemistry, Konya, Turkey
| | - Ahmet Uysal
- Selcuk University, Vocational School of Health Services, Department of Medical Services and Techniques, Konya, Turkey
| | - Mustafa Yilmaz
- Selcuk University, Faculty of Science, Department of Chemistry, Konya, Turkey.
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Sumera NS, Iqbal SS, Khan ST, Rehman ZU. Fusarium oxysporum; its enhanced entomopathogenic activity with acidic silver nanoparticles against Rhipicephalus microplus ticks. BRAZ J BIOL 2023; 84:e266741. [PMID: 36820787 DOI: 10.1590/1519-6984.266741] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Accepted: 11/29/2022] [Indexed: 02/22/2023] Open
Abstract
Fusarium oxysporum is an entomopathogenic fungus, and it has anti-biological activity against arthropods. Ticks are blood sucking arthropods which are responsible for transmitting different diseases in humans and animals. The use of chemical insecticides against ticks is not eco-friendly option and results in the development of acaricide resistance. Previously, we had cultured a local isolate of Fusarium oxysporum from soil samples which were identified through microscopy and confirmed through molecular technique. In our previous experiments, we have prepared Silver nanoparticles (AgNP) at pH 7 and they had been characterized through X-Ray Diffraction (XRD), UV-visible and zeta-potential. In our current study, the AgNP were prepared at different pH conditions and characterized through Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM). The protein molecules of F. oxysporum were charged with Ag ions. F. oxysporum NP were observed to enhance anti-biological activity by killing Rhipicephalus microplus and they caused 100% mortality at pH 4 and pH 5 in 24 h in anti-tick biological assay. Our study is the first report to do biological assay against Rhipicehalus ticks by using Fusarium AgNP at acidic pH. Biological control using entomopathogenic fungi can be the best alternative of the chemical method to control the tick population.
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Affiliation(s)
- N S Sumera
- Government College for Women, Department of Physics, Mustafabad, Lahore, Pakistan.,University of Lahore, Department of Physics, Lahore, Pakistan
| | - S S Iqbal
- University of Lahore, Department of Physics, Lahore, Pakistan.,Lahore Garrison University, Department of Physics, Lahore, Pakistan
| | - S T Khan
- University of Veterinary and Animal Sciences, Department of Parasitology, Lahore, Pakistan
| | - Z Ul Rehman
- University of Veterinary and Animal Sciences, Department of Parasitology, Lahore, Pakistan
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In Vitro Antibacterial and Wound Healing Activities Evoked by Silver Nanoparticles Synthesized through Probiotic Bacteria. Antibiotics (Basel) 2023; 12:antibiotics12010141. [PMID: 36671342 PMCID: PMC9854575 DOI: 10.3390/antibiotics12010141] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 01/04/2023] [Accepted: 01/09/2023] [Indexed: 01/13/2023] Open
Abstract
The prospective application of probiotics is an adjuvant for the advancement of novel antimicrobial and wound-healing agents. Currently, probiotic bacteria are utilized for the biosynthesis of nanoparticles in the development of innovative therapeutics. The present study aimed at using nanoparticle-conjugated probiotic bacteria for enhanced antibacterial and wound-healing activity. In the present investigation, the probiotic bacteria were isolated from a dairy source (milk from domestic herbivores). They screened for antibacterial activity against infection-causing Gram-negative (Pseudomonas aeruginosa and Escherichia coli) and Gram-positive (Bacillus subtilis and Staphylococcus aureus) pathogens. Further, the probiotic strain with higher bactericidal activity was used to synthesize silver, selenium, and copper nanoparticles. The isolated strain was found to be Lactiplantibacillus plantarum and it only has the ability to synthesize silver nanoparticles. This was verified using Ultra violet-Visible (UV-Vis) spectroscopy, where the test solution turned brown and the greatest UV-Vis absorptions peaked at 425 nm. Optimization studies on the synthesis of AgNPs (silver nanoparticles) are presented and the results show that stable synthesis was obtained by using a concentration of 1mM silver nitrate (AgNO3) at a temperature of 37 °C with pH 8. The FTIR (Fourier transform infrared spectroscopy) study confirmed the involvement of functional groups from the cell biomass that were involved in the reduction process. Additionally, biosynthesized AgNPs showed increased antioxidant and antibacterial activities. The nano silver had a size distribution of 14 nm and was recorded with HR-TEM (high-resolution transmission electron microscopy) examination. The EDX (energy dispersive X-ray) analysis revealed 57% of silver groups found in the nanoparticle production. The biosynthesized AgNPs show significant wound-healing capabilities with 96% of wound closure (fibroblast cells) being observed through an in vitro scratch-wound assay. The cytotoxic experiments demonstrated that the biosynthesized AgNPs are not extremely hazardous to the fibroblast cells. The present study provides a new platform for the green synthesis of AgNPs using probiotic bacteria, showing significant antibacterial and wound-healing potentials against infectious pathogens.
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Guerrero-Arguero I, Khan SR, Henry BM, Garcia-Vilanova A, Chiem K, Ye C, Shrestha S, Knight D, Cristner M, Hill S, Waldman WJ, Dutta PK, Torrelles JB, Martinez-Sobrido L, Nagy AM. Mitigation of SARS-CoV-2 by Using Transition Metal Nanozeolites and Quaternary Ammonium Compounds as Antiviral Agents in Suspensions and Soft Fabric Materials. Int J Nanomedicine 2023; 18:2307-2324. [PMID: 37163142 PMCID: PMC10164392 DOI: 10.2147/ijn.s396669] [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: 01/14/2023] [Accepted: 04/05/2023] [Indexed: 05/11/2023] Open
Abstract
Introduction The coronavirus disease 2019 (COVID-19) pandemic has demonstrated the need for novel, affordable, and efficient reagents to help reduce viral transmission, especially in high-risk environments including medical treatment facilities, close quarters, and austere settings. We examined transition-metal nanozeolite suspensions and quaternary ammonium compounds as an antiviral surface coating for various textile materials. Methods Zeolites are crystalline porous aluminosilicate materials, with the ability of ion-exchanging different cations. Nanozeolites (30 nm) were synthesized and then ion-exchanged with silver, zinc and copper ions. Benzalkonium nitrate (BZN) was examined as the quaternary ammonium ion (quat). Suspensions of these materials were tested for antiviral activity towards SARS-CoV-2 using plaque assay and immunostaining. Suspensions of the nanozeolite and quat were deposited on polyester and cotton fabrics and the ability of these textiles towards neutralizing SARS-CoV-2 was examined. Results We hypothesized that transition metal ion containing zeolites, particularly silver and zinc (AM30) and silver and copper (AV30), would be effective in reducing the infectivity of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Additionally, AM30 and AV30 antiviral potency was tested when combined with a quaternary ammonium carrier, BZN. Our results indicate that exposure of SARS-CoV-2 to AM30 and/or AV30 suspensions reduced viral loads with time and exhibited dose-dependence. Antiviral activities of the combination of zeolite and BZN compositions were significantly enhanced. When used in textiles, AM30 and AV30-coated cotton and polyester fabrics alone or in combination with BZN exhibited significant antiviral properties, which were maintained even after various stress tests, including washes, SARS-CoV-2-repeated exposures, or treatments with soil-like materials. Conclusion This study shows the efficacy of transition metal nanozeolite formulations as novel antiviral agents and establishes that nanozeolite with silver and zinc ions (AM30) and nanozeolite with silver and copper ions (AV30) when combined with benzalkonium nitrate (BZN) quickly and continuously inactivate SARS-CoV-2 in suspension and on fabric materials.
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Affiliation(s)
- Israel Guerrero-Arguero
- Disease Intervention & Prevention and Population Health Programs, Texas Biomedical Research Institute, San Antonio, TX, USA
| | - Siddiqur Rahman Khan
- Disease Intervention & Prevention and Population Health Programs, Texas Biomedical Research Institute, San Antonio, TX, USA
| | - Brandon M Henry
- Disease Intervention & Prevention and Population Health Programs, Texas Biomedical Research Institute, San Antonio, TX, USA
| | - Andreu Garcia-Vilanova
- Disease Intervention & Prevention and Population Health Programs, Texas Biomedical Research Institute, San Antonio, TX, USA
| | - Kevin Chiem
- Disease Intervention & Prevention and Population Health Programs, Texas Biomedical Research Institute, San Antonio, TX, USA
| | - Chengjin Ye
- Disease Intervention & Prevention and Population Health Programs, Texas Biomedical Research Institute, San Antonio, TX, USA
| | | | - Deborah Knight
- Department of Pathology, The Ohio State University, Columbus, OH, USA
| | - Mark Cristner
- Chief Scientist’s Office of Science and Technology, 59 Medical Wing, Joint Base San Antonio-Lackland, San Antonio, TX, USA
| | - Shauna Hill
- Chief Scientist’s Office of Science and Technology, 59 Medical Wing, Joint Base San Antonio-Lackland, San Antonio, TX, USA
| | - W James Waldman
- Department of Pathology, The Ohio State University, Columbus, OH, USA
| | - Prabir K Dutta
- ZeoVation Inc., Columbus, OH, USA
- Department of Chemistry, The Ohio State University, Columbus, OH, USA
- Correspondence: Prabir K Dutta; Amber M Nagy, Email ;
| | - Jordi B Torrelles
- Disease Intervention & Prevention and Population Health Programs, Texas Biomedical Research Institute, San Antonio, TX, USA
| | - Luis Martinez-Sobrido
- Disease Intervention & Prevention and Population Health Programs, Texas Biomedical Research Institute, San Antonio, TX, USA
| | - Amber M Nagy
- Disease Intervention & Prevention and Population Health Programs, Texas Biomedical Research Institute, San Antonio, TX, USA
- Chief Scientist’s Office of Science and Technology, 59 Medical Wing, Joint Base San Antonio-Lackland, San Antonio, TX, USA
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Sahihi M, Faraudo J. Computer Simulation of the Interaction between SARS-CoV-2 Spike Protein and the Surface of Coinage Metals. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:14673-14685. [PMID: 36418228 PMCID: PMC9730903 DOI: 10.1021/acs.langmuir.2c02120] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Revised: 11/07/2022] [Indexed: 06/16/2023]
Abstract
A prominent feature of the SARS-CoV-2 virus is the presence of a large glycoprotein spike protruding from the virus envelope. The spike determines the interaction of the virus with the environment and the host. Here, we used an all-atom molecular dynamics simulation method to investigate the interaction of up- and down-conformations of the S1 subunit of the SARS-CoV-2 spike with the (100) surface of Au, Ag, and Cu. Our results revealed that the spike protein is adsorbed onto the surface of these metals, with Cu being the metal with the highest interaction with the spike. In our simulations, we considered the spike protein in both its up-conformation Sup (one receptor binding domain exposed) and down-conformation Sdown (no exposed receptor binding domain). We found that the affinity of the metals for the up-conformation was higher than their affinity for the down-conformation. The structural changes in the spike in the up-conformation were also larger than the changes in the down-conformation. Comparing the present results for metals with those obtained in our previous MD simulations of Sup with other materials (cellulose, graphite, and human skin models), we see that Au induces the highest structural change in Sup, larger than those obtained in our previous studies.
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Alp-Erbay E. Nanomaterials Utilized in Food Packaging: State-of-the-Art. FOOD ENGINEERING REVIEWS 2022. [DOI: 10.1007/s12393-022-09318-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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J. T, C. B. Ovicidal, larvicidal and pupicidal efficacy of silver nanoparticles synthesized by Bacillus marisflavi against the chosen mosquito species. PLoS One 2021; 16:e0260253. [PMID: 34919572 PMCID: PMC8682912 DOI: 10.1371/journal.pone.0260253] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Accepted: 11/08/2021] [Indexed: 11/18/2022] Open
Abstract
Microbial synthesis of silver nanoparticles is more advantageous and is eco-friendly to combat the various vectors that cause diseases in humans. Hence, in the present study a Bacillus strain is isolated from marine habitat and is evaluated for its ability to synthesize silver nanoparticles (AgNPs) and its efficacy evaluated against the immature stages of selected mosquito species. The effective candidate was confirmed to be Bacillus marisflavi after 16S rRNA sequencing. The synthesis of AgNPs was confirmed by UV-Vis spectrophotometer. Atomic Force Microscopic (AFM) analysis showed spherical nanoparticles. Size analysis using Scanning Electron Microscope (SEM) showed particles of nano size averaging 78.77 nm. The diameter of the particles analyzed by Dynamic Light Scattering (DLS) showed 101.6 nm with a poly-dispersive index of 0.3. Finally the elemental nature of the nanoparticles was identified by Fourier-transform infrared spectroscopy (FTIR). LC50 and LC90 values for the ovicidal, larvicidal and pupicidal efficacy of the AgNPs against the egg, larvae and pupae of Aedes aegypti, Culex quinquefasciatus and Anopheles stephensi respectively were evaluated. The present study revealed that the nanoparticles have an excellent toxic effect against the disease transmitting vector mosquitoes. Hence, the rapid synthesis of AgNPs would be an appropriate eco-friendly tool for biocontrol of vector mosquitoes.
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Affiliation(s)
- Thelma J.
- Department of Zoology, Thiagarajar College, Madurai, Tamil Nadu, India
- * E-mail:
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Elbokl M, Momciu B, Kishibe T, Oliver MJ, Perl J. Peritoneal dialysis access outcomes reported in randomized controlled trials: A systematic review. Perit Dial Int 2020; 41:552-563. [PMID: 33107402 DOI: 10.1177/0896860820966898] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND Functional peritoneal dialysis (PD) access is critical to the success of PD therapy. The aim of this review is to describe the spectrum of definitions and methods employed in the measurement of unique outcomes across PD access trials particularly focusing on the outcomes of PD access flow restriction and operative-related outcomes. METHODS Using Cochrane CENTRAL registry, MEDLINE, and EMBASE, we searched for studies restricted to randomized controlled trials (RCTs) involving interventions related to PD access without restrictions on age, language, or publication year. Studies were screened and data abstracted by two independent reviewers. Definitions, outcome measures, and time points of measurements were captured and documented separately. Unique combinations of these variables resulted in reporting the different ways of measurements. RESULTS Of the 1768 screened studies, 47 RCTs were included among which 817 PD access outcomes were grouped into 7 broad categories. Interventions evaluated in the RCTs were catheter type/configuration (n = 17), insertion technique (n = 15), multiple interventions (n = 3), and other (6 interventions, n = 12). PD access flow restriction (a subcategory of mechanical outcomes) and operative-related outcomes were reported in 91% and 58% of the included trials, respectively. Tip migration was the most frequently reported flow restriction outcome (59% of RCTs) followed by catheter dysfunction (23% of RCTs). Of the components utilized in definition of flow restriction, description of the impaired flow was reported in 37% of RCTs, need for intervention in 42% of RCTs, and presumed etiology of flow restriction in 60% of RCTs. CONCLUSION Variability exists in the definitions, reporting methods, choice of outcomes, and analysis of the PD access outcomes across RCTs. Operative-related outcomes remain underreported across RCTs. Outcomes relating to PD access flow restriction were the most common complications reported in the included RCTs but were reported heterogeneously with variability in reporting of the three key components of its definition including description and severity of the flow restriction, the need for intervention and etiology of flow restriction. In the future, defining PD access flow restriction should include all of these components to better evaluate the comparative effect of various PD access interventions.
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Affiliation(s)
- Mohamed Elbokl
- Division of Nephrology, University Health Network, 7938University of Toronto, Ontario, Canada
| | - Bogdan Momciu
- Division of Nephrology, University Health Network, 7938University of Toronto, Ontario, Canada
| | - Teruko Kishibe
- St. Michael's Hospital and the Keenan Research Center in the 518773Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Ontario, Canada
| | - Matthew J Oliver
- Division of Nephrology, 494622Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada
| | - Jeffrey Perl
- Division of Nephrology, St. Michael's Hospital and the Keenan Research Center in the Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Ontario, Canada
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Comparative studies of sunlight mediated green synthesis of silver nanoparaticles from Azadirachta indica leaf extract and its antibacterial effect on Xanthomonas oryzae pv. oryzae. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2018.07.016] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
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Riau AK, Aung TT, Setiawan M, Yang L, Yam GHF, Beuerman RW, Venkatraman SS, Mehta JS. Surface Immobilization of Nano-Silver on Polymeric Medical Devices to Prevent Bacterial Biofilm Formation. Pathogens 2019; 8:E93. [PMID: 31261752 PMCID: PMC6789847 DOI: 10.3390/pathogens8030093] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Revised: 06/25/2019] [Accepted: 06/27/2019] [Indexed: 01/22/2023] Open
Abstract
: Bacterial biofilm on medical devices is difficult to eradicate. Many have capitalized the anti-infective capability of silver ions (Ag+) by incorporating nano-silver (nAg) in a biodegradable coating, which is then laid on polymeric medical devices. However, such coating can be subjected to premature dissolution, particularly in harsh diseased tissue microenvironment, leading to rapid nAg clearance. It stands to reason that impregnating nAg directly onto the device, at the surface, is a more ideal solution. We tested this concept for a corneal prosthesis by immobilizing nAg and nano-hydroxyapatite (nHAp) on poly(methyl methacrylate), and tested its biocompatibility with human stromal cells and antimicrobial performance against biofilm-forming pathogens, Pseudomonas aeruginosa and Staphylococcus aureus. Three different dual-functionalized substrates-high Ag (referred to as 75:25 HAp:Ag); intermediate Ag (95:5 HAp:Ag); and low Ag (99:1 HAp:Ag) were studied. The 75:25 HAp:Ag was effective in inhibiting biofilm formation, but was cytotoxic. The 95:5 HAp:Ag showed the best selectivity among the three substrates; it prevented biofilm formation of both pathogens and had excellent biocompatibility. The coating was also effective in eliminating non-adherent bacteria in the culture media. However, a 28-day incubation in artificial tear fluid revealed a ~40% reduction in Ag+ release, compared to freshly-coated substrates. The reduction affected the inhibition of S. aureus growth, but not the P. aeruginosa. Our findings suggest that Ag+ released from surface-immobilized nAg diminishes over time and becomes less effective in suppressing biofilm formation of Gram-positive bacteria, such as S. aureus. This advocates the coating, more as a protection against perioperative and early postoperative infections, and less as a long-term preventive solution.
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Affiliation(s)
- Andri K Riau
- Tissue Engineering and Stem Cell Group, Singapore Eye Research Institute, Singapore 169856, Singapore.
- School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore.
| | - Thet T Aung
- Anti-Infectives Research Group, Singapore Eye Research Institute, Singapore 169856, Singapore.
| | - Melina Setiawan
- Tissue Engineering and Stem Cell Group, Singapore Eye Research Institute, Singapore 169856, Singapore.
| | - Liang Yang
- School of Medicine, Southern University of Science and Technology, Shenzhen 518055, China
| | - Gary H F Yam
- Tissue Engineering and Stem Cell Group, Singapore Eye Research Institute, Singapore 169856, Singapore.
- Ophthalmology and Visual Sciences ACP, Duke-National University of Singapore Medical School, Singapore 169857, Singapore.
| | - Roger W Beuerman
- Anti-Infectives Research Group, Singapore Eye Research Institute, Singapore 169856, Singapore.
- Ophthalmology and Visual Sciences ACP, Duke-National University of Singapore Medical School, Singapore 169857, Singapore.
- SRP Neuroscience and Emerging Infectious Disease, Duke-National University of Singapore Medical School, Singapore 169857, Singapore.
| | - Subbu S Venkatraman
- School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Jodhbir S Mehta
- Tissue Engineering and Stem Cell Group, Singapore Eye Research Institute, Singapore 169856, Singapore.
- School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore.
- Ophthalmology and Visual Sciences ACP, Duke-National University of Singapore Medical School, Singapore 169857, Singapore.
- Corneal and External Eye Disease Service, Singapore National Eye Centre, Singapore 168751, Singapore.
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Htay H, Johnson DW, Craig JC, Schena FP, Strippoli GFM, Tong A, Cho Y. Catheter type, placement and insertion techniques for preventing catheter-related infections in chronic peritoneal dialysis patients. Cochrane Database Syst Rev 2019; 5:CD004680. [PMID: 31149735 PMCID: PMC6543877 DOI: 10.1002/14651858.cd004680.pub3] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
BACKGROUND Peritonitis is one of the limiting factors for the growth of peritoneal dialysis (PD) worldwide and is a major cause of technique failure. Several studies have examined the effectiveness of various catheter-related interventions for lowering the risk of PD-related peritonitis. This is an update of a review first published in 2004. OBJECTIVES To evaluate the role of different catheter implantation techniques and catheter types in lowering the risk of PD-related peritonitis in PD patients. SEARCH METHODS We searched the Cochrane Kidney and Transplant Register of Studies up to 15 January 2019 through contact with the Information Specialist using search terms relevant to this review. Studies in the Register are identified through searches of CENTRAL, MEDLINE, and EMBASE, conference proceedings, the International Clinical Trials Register (ICTRP) Search Portal and ClinicalTrials.gov. SELECTION CRITERIA Studies comparing different catheter insertion techniques, catheter types, use of immobilisation techniques and different break-in periods were included. Studies of different PD sets were excluded. DATA COLLECTION AND ANALYSIS Two authors independently assessed study quality and extracted data. Statistical analyses were performed using a random effects model and the results expressed as risk ratio (RR) with 95% confidence intervals (CI). MAIN RESULTS Forty-two studies (3144 participants) were included: 18 evaluated techniques of catheter implantation, 22 examined catheter types, one assessed an immobiliser device, and one examined break-in period. In general, study quality was variable and almost all aspects of study design did not fulfil CONSORT standards for reporting.Catheter insertion by laparoscopy compared with laparotomy probably makes little or no difference to the risks of peritonitis (RR 0.90, 95% CI 0.59 to 1.35; moderate certainty evidence), exit-site/tunnel infection (RR 1.00, 95% CI 0.43 to 2.31; low certainty evidence), catheter removal/replacement (RR 1.20, 95% CI 0.77 to 1.86; low certainty evidence), technique failure (RR 0.71, 95% CI 0.47 to 1.08; low certainty evidence), and death (all causes) (RR 1.26, 95% CI 0.72 to 2.20; moderate certainty evidence). It is uncertain whether subcutaneous burying of catheter increases peritonitis (RR 1.16, 95% CI 0.37 to 3.60; very low certainty evidence). Midline insertion compared to lateral insertion probably makes little or no difference to the risks of peritonitis (RR 0.65, 95% CI 0.32 to 1.33; moderate certainty evidence) and may make little or no difference to exit-site/tunnel infection (RR 0.56, 95% CI 0.12 to 2.58; low certainty evidence). Percutaneous insertion compared with open surgery probably makes little or no difference to the exit-site/tunnel infection (RR 0.16, 95% CI 0.02 to 1.30; moderate certainty evidence).Straight catheters probably make little or no difference to the risk of peritonitis (RR 1.04, 95% CI 0.82 to 1.31; moderate certainty evidence), peritonitis rate (RR 0.91, 95% CI 0.68 to 1.21; moderate certainty evidence), risk of exit-site infection (RR 1.12, 95% CI 0.94 to 1.34; moderate certainty evidence), and exit-site infection rate (RR 1.05, 95% CI 0.77 to 1.43; moderate certainty evidence) compared to coiled catheter. It is uncertain whether straight catheters prevent catheter removal or replacement (RR 1.11, 95% CI 0.73 to 1.66; very low certainty evidence) but straight catheters probably make little or no difference to technique failure (RR 0.82, 95% CI 0.51 to 1.31; moderate certainty evidence) and death (all causes) (RR 0.95, 95% CI 0.62 to 1.46; low certainty evidence) compared to coiled catheter. Tenckhoff catheter with artificial curve at subcutaneous tract compared with swan-neck catheter may make little or no difference to peritonitis (RR 1.29, 95% CI 0.85 to 1.96; low certainty evidence) and incidence of exit-site/tunnel infection (RR 0.96, 95% CI 0.77 to 1.21; low certainty evidence) but may slightly improve exit-site infection rate (RR 0.67, 95% CI 0.50 to 0.90; low certainty evidence). AUTHORS' CONCLUSIONS There is no strong evidence that any catheter-related intervention, including the use of different catheter types or different insertion techniques, reduces the risks of PD peritonitis or other PD-related infections, technique failure or death (all causes). However, the numbers and sizes of studies were generally small and the methodological quality of available studies was suboptimal, such that the possibility that a particular catheter-related intervention might have a beneficial effect cannot be completely ruled out with confidence.
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Affiliation(s)
- Htay Htay
- Singapore General HospitalDepartment of Renal Medicine20 College StreetSingaporeSingapore169856
| | - David W Johnson
- Princess Alexandra HospitalDepartment of NephrologyIpswich RoadWoolloongabbaQueenslandAustralia4102
- University of QueenslandBrisbaneAustralia
| | - Jonathan C Craig
- The Children's Hospital at WestmeadCochrane Kidney and Transplant, Centre for Kidney ResearchWestmeadNSWAustralia2145
- Flinders UniversityCollege of Medicine and Public HealthAdelaideSAAustralia5001
| | - Francesco Paolo Schena
- University of BariDepartment of Emergency and Organ TransplantationPoliclinicoPiazza Giulio Cesare 11BariItaly70124
| | - Giovanni FM Strippoli
- The Children's Hospital at WestmeadCochrane Kidney and Transplant, Centre for Kidney ResearchWestmeadNSWAustralia2145
- University of BariDepartment of Emergency and Organ TransplantationPoliclinicoPiazza Giulio Cesare 11BariItaly70124
- DiaverumMedical Scientific OfficeLundSweden
- The University of SydneySydney School of Public HealthSydneyAustralia
| | - Allison Tong
- The University of SydneySydney School of Public HealthSydneyAustralia
- The Children's Hospital at WestmeadCentre for Kidney ResearchLocked Bag 4001WestmeadNSWAustralia2145
| | - Yeoungjee Cho
- Princess Alexandra HospitalDepartment of NephrologyIpswich RoadWoolloongabbaQueenslandAustralia4102
- University of QueenslandBrisbaneAustralia
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16
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Aqueous synthesis and antibacterial activity of Silver nanoparticles against pseudomonas putida. ACTA ACUST UNITED AC 2019. [DOI: 10.1016/j.matpr.2019.03.028] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Abstract
AIM There is an urgent need to develop alternative antimicrobial agents and, one of which is via the use of nanotechnology. Green synthetic routes are recently being replaced for nanoparticles preparation. Methods results: Silver-curcumin nanoconjugates (Ag-CurNCs) were prepared in an eco-friendly method. The prepared nanomaterials were characterized and the photostability was studied under the influence of UV irradiation. Results showed that, the conjugation between curcumin and silver in the nanoform improve the photostability of curcumin. Cytotoxicity was studied on different skin cell lines, and antibacterial activity was investigated against Escherichia coli. Results revealed the antibacterial activity of the prepared nanoconjugates (Ag-CurNCs) with minimal toxicity to skin cells. CONCLUSION Silver nanoparticles improve the photostability and antibacterial activity of curcumin, while curcumin helps in preparing biocompatible silver nanoparticles.
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Aloe vera (L.) Burm. F Assisted Green Synthesis and Biological Applications of Y2O3:Mg2+ Nanocomposites. J CLUST SCI 2018. [DOI: 10.1007/s10876-018-1400-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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19
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Siddiqi KS, Husen A, Rao RAK. A review on biosynthesis of silver nanoparticles and their biocidal properties. J Nanobiotechnology 2018; 16:14. [PMID: 29452593 PMCID: PMC5815253 DOI: 10.1186/s12951-018-0334-5] [Citation(s) in RCA: 469] [Impact Index Per Article: 78.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Accepted: 01/19/2018] [Indexed: 12/21/2022] Open
Abstract
Use of silver and silver salts is as old as human civilization but the fabrication of silver nanoparticles (Ag NPs) has only recently been recognized. They have been specifically used in agriculture and medicine as antibacterial, antifungal and antioxidants. It has been demonstrated that Ag NPs arrest the growth and multiplication of many bacteria such as Bacillus cereus, Staphylococcus aureus, Citrobacter koseri, Salmonella typhii, Pseudomonas aeruginosa, Escherichia coli, Klebsiella pneumonia, Vibrio parahaemolyticus and fungus Candida albicans by binding Ag/Ag+ with the biomolecules present in the microbial cells. It has been suggested that Ag NPs produce reactive oxygen species and free radicals which cause apoptosis leading to cell death preventing their replication. Since Ag NPs are smaller than the microorganisms, they diffuse into cell and rupture the cell wall which has been shown from SEM and TEM images of the suspension containing nanoparticles and pathogens. It has also been shown that smaller nanoparticles are more toxic than the bigger ones. Ag NPs are also used in packaging to prevent damage of food products by pathogens. The toxicity of Ag NPs is dependent on the size, concentration, pH of the medium and exposure time to pathogens.
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Affiliation(s)
| | - Azamal Husen
- Department of Biology, College of Natural and Computational Sciences, University of Gondar, P.O. Box # 196, Gondar, Ethiopia
| | - Rifaqat A. K. Rao
- Department of Applied Chemistry, Zakir Husain College of Engineering and Technology, Aligarh Muslim University, Aligarh, Uttar Pradesh 202002 India
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20
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Qiu Y, Zhang N, An YH, Wen X. Biomaterial Strategies to Reduce Implant-Associated Infections. Int J Artif Organs 2018; 30:828-41. [DOI: 10.1177/039139880703000913] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Although the prophylaxis in controlling sterility within the operating room environment has been greatly improved, implant-associated infection is still one of the most serious complications in implant surgeries due to the existence of immune depression in the peri-implant area. The antibacterial ability of materials themselves logically becomes an important factor in preventing implant-associated infections. With the understanding of the pathogenesis of implant-associated infections, many approaches have been developed through providing an anti-adhesive surface, delivering antibacterial agents to disrupt cell-cell communication and preventing bacteria aggregation or biofilm formation, or killing bacteria directly (lysing the cell membrane). In this article, we review the current strategies in improving the antibacterial ability of materials to prevent implant infection and further present promising tactics in materials design and applications.
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Affiliation(s)
- Y. Qiu
- Clemson-MUSC Bioengineering Program, Department of Bioengineering, Clemson University, Charleston, South Carolina - USA
| | - N. Zhang
- Clemson-MUSC Bioengineering Program, Department of Bioengineering, Clemson University, Charleston, South Carolina - USA
- Department of Cell Biology and Anatomy, Medical University of South Carolina, Charleston, South Carolina - USA
| | - Y. H. An
- Department of Orthopedic Surgery, Medical University of South Carolina, Charleston, South Carolina - USA
| | - X. Wen
- Clemson-MUSC Bioengineering Program, Department of Bioengineering, Clemson University, Charleston, South Carolina - USA
- Department of Cell Biology and Anatomy, Medical University of South Carolina, Charleston, South Carolina - USA
- Department of Orthopedic Surgery, Medical University of South Carolina, Charleston, South Carolina - USA
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21
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Tareq FK, Fayzunnesa M, Kabir MS. RETRACTED: Antimicrobial activity of plant-median synthesized silver nanoparticles against food and agricultural pathogens. Microb Pathog 2017; 109:228-232. [DOI: 10.1016/j.micpath.2017.06.002] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Revised: 05/30/2017] [Accepted: 06/01/2017] [Indexed: 11/16/2022]
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Milo S, Hathaway H, Nzakizwanayo J, Alves DR, Esteban PP, Jones BV, Jenkins ATA. Prevention of encrustation and blockage of urinary catheters by Proteus mirabilis via pH-triggered release of bacteriophage. J Mater Chem B 2017; 5:5403-5411. [PMID: 32264080 DOI: 10.1039/c7tb01302g] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The crystalline biofilms of Proteus mirabilis can seriously complicate the care of patients undergoing long-term indwelling urinary catheterisation. Expression of bacterial urease causes a significant increase in urinary pH, leading to the supersaturation and precipitation of struvite and apatite crystals. These crystals become lodged within the biofilm, resulting in the blockage of urine flow through the catheter. Here, we describe an infection-responsive surface coating for urinary catheters, which releases a therapeutic dose of bacteriophage in response to elevated urinary pH, in order to delay catheter blockage. The coating employs a dual-layered system comprising of a lower hydrogel 'reservoir' layer impregnated with bacteriophage, capped by a 'trigger' layer of the pH-responsive polymer poly(methyl methacrylate-co-methacrylic acid) (EUDRAGIT®S 100). Evaluation of prototype coatings using a clinically reflective in vitro bladder model system showed that catheter blockage time was doubled (13 h to 26 h (P < 0.05)) under conditions of established infection (108 CFU ml-1) in response to a 'burst-release' of bacteriophage (108 PFU ml-1). Coatings were stable both in the absence of infection, and in the presence of urease-negative bacteria. Quantitative and visual analysis of crystalline biofilm reduction show that bacteriophage constitute a promising strategy for the prevention of catheter blockage, a clinical problem for which there is currently no effective control method.
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Affiliation(s)
- Scarlet Milo
- Department of Chemistry, University of Bath, BA2 7AY, UK.
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Bajpai SK, Ahuja S, Chand N, Bajpai M. Nano cellulose dispersed chitosan film with Ag NPs/Curcumin: An in vivo study on Albino Rats for wound dressing. Int J Biol Macromol 2017; 104:1012-1019. [PMID: 28666832 DOI: 10.1016/j.ijbiomac.2017.06.096] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Revised: 06/06/2017] [Accepted: 06/23/2017] [Indexed: 11/25/2022]
Abstract
With an aim to develop chitosan film with controllable swelling behavior and maximum antimicrobial efficacy, we hereby report cellulose nano crystals loaded chitosan films with Curcumin/Ag nano particles embedded as strong antimicrobial agents. The CNC had average size of 40-90nm with poly dispersity index of 3.641. The TEM analysis of Ag NPs, produced via DMF reduction, revealed a particle size range of 15-25nm. The Surface Plasmon resonance (SPR) of these Ag NPs shifted from 380 to 440nm, with the increase in concentration of Ag (I). The TGA of the film samples Ch/CNC, and Ch/CNC (Ag463/Cur450) exhibited% weight loss of around 95 and 80 respectively, thus indicating higher stability due to presence of Ag NPs. In XRD analysis 2θ reflections at 38.12, 44.28 and 66.46°, confirmed the presence planes (1 1), (2 0) and (2 0) respectively. In skin irritation test, the mean Erythema scores observed after 72h was zero for both the Curcumin and Ag NPs/Curcumin loaded films. The percent wound reduction, observed for the film samples Ch/CNC (Cur450) and Ch/CNC (Ag NP463/Cur450) was 57.8 and 97.2 respectively, indicating better suitability of Ag NPs/Curcumin loaded film.
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Affiliation(s)
- S K Bajpai
- Polymer Research Laboratory Department of Chemistry, Govt. Model Science College, Jabalpur (M.P) - 482001, India.
| | - Sonam Ahuja
- Polymer Research Laboratory Department of Chemistry, Govt. Model Science College, Jabalpur (M.P) - 482001, India
| | | | - M Bajpai
- Polymer Research Laboratory Department of Chemistry, Govt. Model Science College, Jabalpur (M.P) - 482001, India
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Biosynthesis of Zinc Oxide Nanoparticles Using Plant Extracts of Aloe vera and Hibiscus sabdariffa: Phytochemical, Antibacterial, Antioxidant and Anti-proliferative Studies. BIONANOSCIENCE 2017. [DOI: 10.1007/s12668-017-0418-y] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Guo Q, Zhao Y, Dai X, Zhang T, Yu Y, Zhang X, Li C. Functional Silver Nanocomposites as Broad-Spectrum Antimicrobial and Biofilm-Disrupting Agents. ACS APPLIED MATERIALS & INTERFACES 2017; 9:16834-16847. [PMID: 28481506 DOI: 10.1021/acsami.7b02775] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Biofilms' tolerance has become a serious clinical concern due to their formidable resistance to conventional antibiotics and prevalent virulence. Therefore, there is an urgent need to develop alternative antimicrobial agents to eradicate biofilms but avoid using antibiotics. Herein, we successfully developed polymer functional silver nanocomposites by reduction of silver nitrate in the presence of a biocompatible carbohydrate polymer and a membrane-disrupting cationic polymer. The nanocomposites presented effective antimicrobial activity against Gram-negative bacteria (Pseudomonas aeruginosa, Escherichia coli) and Gram-positive bacteria (Staphylococcus aureus and Bacillus amyloliquefaciens). Confocal laser scanning macroscopy imaging demonstrated that the nanocomposites could efficiently disperse and eradicate the mature biofilms formed by the above four bacterial strains. The introduction of carbohydrate polymers onto nanocomposites effectively improved the biocompatibility, and these nanocomposites induced no significant red blood cell hemolysis and cytotoxicity toward mammalian cells. More importantly, the nanocomposites were able to well eradicate the bacterial biofilms formed on the silicone implants in vivo. In conclusion, the nanocomposites as the broad-spectrum biofilm-disrupting agent are significant in the design of new strategies to eradicate biofilms on indwelling medical devices.
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Affiliation(s)
- Qianqian Guo
- Key Laboratory of Functional Polymer Materials of Ministry of Education, Institute of Polymer Chemistry, Nankai University , Tianjin 300071, China
| | - Yu Zhao
- Key Laboratory of Functional Polymer Materials of Ministry of Education, Institute of Polymer Chemistry, Nankai University , Tianjin 300071, China
| | - Xiaomei Dai
- Key Laboratory of Functional Polymer Materials of Ministry of Education, Institute of Polymer Chemistry, Nankai University , Tianjin 300071, China
| | - Tianqi Zhang
- Key Laboratory of Functional Polymer Materials of Ministry of Education, Institute of Polymer Chemistry, Nankai University , Tianjin 300071, China
| | - Yunjian Yu
- Key Laboratory of Functional Polymer Materials of Ministry of Education, Institute of Polymer Chemistry, Nankai University , Tianjin 300071, China
| | - Xinge Zhang
- Key Laboratory of Functional Polymer Materials of Ministry of Education, Institute of Polymer Chemistry, Nankai University , Tianjin 300071, China
| | - Chaoxing Li
- Key Laboratory of Functional Polymer Materials of Ministry of Education, Institute of Polymer Chemistry, Nankai University , Tianjin 300071, China
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Naganathan K, Thirunavukkarasu S. Green way genesis of silver nanoparticles using multiple fruit peels waste and its antimicrobial, anti-oxidant and anti-tumor cell line studies. ACTA ACUST UNITED AC 2017. [DOI: 10.1088/1757-899x/191/1/012009] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Campbell D, Mudge DW, Craig JC, Johnson DW, Tong A, Strippoli GF. Antimicrobial agents for preventing peritonitis in peritoneal dialysis patients. Cochrane Database Syst Rev 2017; 4:CD004679. [PMID: 28390069 PMCID: PMC6478113 DOI: 10.1002/14651858.cd004679.pub3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND Peritoneal dialysis (PD) is an important therapy for patients with end-stage kidney disease and is used in more than 200,000 such patients globally. However, its value is often limited by the development of infections such as peritonitis and exit-site and tunnel infections. Multiple strategies have been developed to reduce the risk of peritonitis including antibiotics, topical disinfectants to the exit site and antifungal agents. However, the effectiveness of these strategies has been variable and are based on a small number of randomised controlled trials (RCTs). The optimal preventive strategies to reduce the occurrence of peritonitis remain unclear.This is an update of a Cochrane review first published in 2004. OBJECTIVES To evaluate the benefits and harms of antimicrobial strategies used to prevent peritonitis in PD patients. SEARCH METHODS We searched the Cochrane Kidney and Transplant's Specialised Register to 4 October 2016 through contact with the Information Specialist using search terms relevant to this review. Studies contained in the Specialised Register are identified through search strategies specifically designed for CENTRAL, MEDLINE, and EMBASE; handsearching conference proceedings; and searching the International Clinical Trials Register (ICTRP) Search Portal and ClinicalTrials.gov. SELECTION CRITERIA RCTs or quasi-RCTs in patients receiving chronic PD, which evaluated any antimicrobial agents used systemically or locally to prevent peritonitis or exit-site/tunnel infection were included. DATA COLLECTION AND ANALYSIS Two authors independently assessed risk of bias and extracted data. Summary estimates of effect were obtained using a random-effects model, and results were expressed as risk ratio (RR) with 95% confidence intervals (CI). MAIN RESULTS Thirty-nine studies, randomising 4435 patients, were included. Twenty additional studies have been included in this update. The risk of bias domains were often unclear or high; risk of bias was judged to be low in 19 (49%) studies for random sequence generation, 12 (31%) studies for allocation concealment, 22 (56%) studies for incomplete outcome reporting, and in 12 (31%) studies for selective outcome reporting. Blinding of participants and personnel was considered to be at low risk of bias in 8 (21%) and 10 studies (26%) for blinding of outcome assessors. It should be noted that blinding of participants and personnel was not possible in many of the studies because of the nature of the intervention or control treatment.The use of oral or topical antibiotic compared with placebo/no treatment, had uncertain effects on the risk of exit-site/tunnel infection (3 studies, 191 patients, low quality evidence: RR 0.45, 95% CI 0.19 to 1.04) and the risk of peritonitis (5 studies, 395 patients, low quality evidence: RR 0.82, 95% CI 0.57 to 1.19).The use of nasal antibiotic compared with placebo/no treatment had uncertain effects on the risk of exit-site/tunnel infection (3 studies, 338 patients, low quality evidence: RR 1.34, 95% CI 0.62 to 2.87) and the risk of peritonitis (3 studies, 338 patients, low quality evidence: RR 0.94, 95% CI 0.67 to 1.31).Pre/perioperative intravenous vancomycin compared with no treatment may reduce the risk of early peritonitis (1 study, 177 patients, low quality evidence: RR 0.08, 95% CI 0.01 to 0.61) but has an uncertain effect on the risk of exit-site/tunnel infection (1 study, 177 patients, low quality evidence: RR 0.36, 95% CI 0.10 to 1.32).The use of topical disinfectant compared with standard care or other active treatment (antibiotic or other disinfectant) had uncertain effects on the risk of exit-site/tunnel infection (8 studies, 973 patients, low quality evidence, RR 1.00, 95% CI 0.75 to 1.33) and the risk of peritonitis (6 studies, 853 patients, low quality evidence: RR 0.83, 95% CI 0.65 to 1.06).Antifungal prophylaxis with oral nystatin/fluconazole compared with placebo/no treatment may reduce the risk of fungal peritonitis occurring after a patient has had an antibiotic course (2 studies, 817 patients, low quality evidence: RR 0.28, 95% CI 0.12 to 0.63).No intervention reduced the risk of catheter removal or replacement. Most of the available studies were small and of suboptimal quality. Only six studies enrolled 200 or more patients. AUTHORS' CONCLUSIONS In this update, we identified limited data from RCTs and quasi-RCTs which evaluated strategies to prevent peritonitis and exit-site/tunnel infections. This review demonstrates that pre/peri-operative intravenous vancomycin may reduce the risk of early peritonitis and that antifungal prophylaxis with oral nystatin or fluconazole reduces the risk of fungal peritonitis following an antibiotic course. However, no other antimicrobial interventions have proven efficacy. In particular, the use of nasal antibiotic to eradicate Staphylococcus aureus, had an uncertain effect on the risk of peritonitis and raises questions about the usefulness of this approach. Given the large number of patients on PD and the importance of peritonitis, the lack of adequately powered and high quality RCTs to inform decision making about strategies to prevent peritonitis is striking.
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Affiliation(s)
- Denise Campbell
- Centre for Kidney Research, The Children's Hospital at Westmead, Locked Bag 4001, Westmead, NSW, Australia, 2145
| | - David W Mudge
- Department of Nephrology, University of Queensland at Princess Alexandra Hospital, Level 2, ARTS Building, Ipswich Rd, Woolloongabba, Queensland, Australia, 4102
| | - Jonathan C Craig
- Sydney School of Public Health, The University of Sydney, Edward Ford Building A27, Sydney, NSW, Australia, 2006
- Cochrane Kidney and Transplant, Centre for Kidney Research, The Children's Hospital at Westmead, Westmead, NSW, Australia, 2145
| | - David W Johnson
- Department of Nephrology, Princess Alexandra Hospital, 199 Ipswich Rd, Woolloongabba, Queensland, Australia, 4102
| | - Allison Tong
- Centre for Kidney Research, The Children's Hospital at Westmead, Locked Bag 4001, Westmead, NSW, Australia, 2145
- Sydney School of Public Health, The University of Sydney, Edward Ford Building A27, Sydney, NSW, Australia, 2006
| | - Giovanni Fm Strippoli
- Sydney School of Public Health, The University of Sydney, Edward Ford Building A27, Sydney, NSW, Australia, 2006
- Cochrane Kidney and Transplant, Centre for Kidney Research, The Children's Hospital at Westmead, Westmead, NSW, Australia, 2145
- Department of Emergency and Organ Transplantation, University of Bari, Bari, Italy
- Medical Scientific Office, Diaverum, Lund, Sweden
- Diaverum Academy, Bari, Italy
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Inoue D, Kabata T, Ohtani K, Kajino Y, Shirai T, Tsuchiya H. Inhibition of biofilm formation on iodine-supported titanium implants. INTERNATIONAL ORTHOPAEDICS 2017; 41:1093-1099. [PMID: 28386730 DOI: 10.1007/s00264-017-3477-3] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Accepted: 03/27/2017] [Indexed: 12/25/2022]
Abstract
PURPOSE We have developed iodine-supported titanium implants that suppress microbial activities and conducted in vivo and in vitro studies to determine their antimicrobial properties. METHODS The implants were Ti-6Al-4 V titanium implants either untreated (Ti), treated with oxide film on the Ti surface by anodization (Ti-O), or treated with an iodine coating on oxidation film (Ti-I). The strain of bacteria used in this study was Gram-positive Staphylococcus aureus strain ATCC 25923. We analyzed the antibacterial attachment effects in vivo by using rats. The attachment bacteria on the implant surface were evaluated using a spread-plate method assay. A biofilm study was performed in vitro. The biofilm formed after bacterial attachment was qualitatively studied with fluorescence microscopy (FM) and scanning electron microscopy (SEM). Also, the formed biofilm was quantitatively studied with a spread-plate method assay. RESULTS In vivo analysis of antimicrobial attachment effects showed that the mean viable bacterial number was significantly lower on Ti-I than Ti or Ti-O surfaces. In the in vitro biofilm study, FM and SEM images showed thick and mature biofilm formation on Ti and Ti-O and thin, small biofilm formation on Ti-I. A quantitative biofilm analysis found a significant difference in the number of viable bacteria between Ti-I and Ti or Ti-O. CONCLUSIONS This study showed that iodine-supported implants have a good antibacterial attachment effect and inhibit biofilm formation and growth. Iodine-supported implants may have great potential as innovative antibacterial implants that can prevent implant related infection in orthopaedic surgery.
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Affiliation(s)
- Daisuke Inoue
- Department of Orthopaedic Surgery, Graduate School of Medical Science, Kanazawa University, 13-1 Takaramachi, Kanazawa, Ishikawa, 920-8641, Japan
| | - Tamon Kabata
- Department of Orthopaedic Surgery, Graduate School of Medical Science, Kanazawa University, 13-1 Takaramachi, Kanazawa, Ishikawa, 920-8641, Japan
| | - Kaori Ohtani
- Depertment of Bacteriology, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan
| | - Yoshitomo Kajino
- Department of Orthopaedic Surgery, Graduate School of Medical Science, Kanazawa University, 13-1 Takaramachi, Kanazawa, Ishikawa, 920-8641, Japan
| | - Toshiharu Shirai
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Hiroyuki Tsuchiya
- Department of Orthopaedic Surgery, Graduate School of Medical Science, Kanazawa University, 13-1 Takaramachi, Kanazawa, Ishikawa, 920-8641, Japan.
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29
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Chouhan N, Ameta R, Meena RK. Biogenic silver nanoparticles from Trachyspermum ammi (Ajwain) seeds extract for catalytic reduction of p-nitrophenol to p-aminophenol in excess of NaBH4. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.01.003] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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30
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Khowdiary M, El-Henawy A, Shawky A, Sameeh M, Negm NA. Synthesis, characterization and biocidal efficiency of quaternary ammonium polymers silver nanohybrids against sulfate reducing bacteria. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.01.022] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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31
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Szeto CC, Li PKT, Johnson DW, Bernardini J, Dong J, Figueiredo AE, Ito Y, Kazancioglu R, Moraes T, Van Esch S, Brown EA. ISPD Catheter-Related Infection Recommendations: 2017 Update. Perit Dial Int 2017; 37:141-154. [DOI: 10.3747/pdi.2016.00120] [Citation(s) in RCA: 193] [Impact Index Per Article: 27.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Accepted: 09/15/2016] [Indexed: 12/18/2022] Open
Affiliation(s)
- Cheuk-Chun Szeto
- Department of Medicine and Therapeutics, Hammersmith Hospital, London, UK
| | - Philip Kam-Tao Li
- Department of Medicine and Therapeutics, Hammersmith Hospital, London, UK
| | - David W. Johnson
- Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong; Department of Nephrology, Hammersmith Hospital, London, UK
| | - Judith Bernardini
- University of Queensland at Princess Alexandra Hospital, Brisbane, Australia; Renal Electrolyte Division, Hammersmith Hospital, London, UK
| | - Jie Dong
- University of Pittsburgh School of Medicine Pittsburgh, PA, USA; Renal Division, Hammersmith Hospital, London, UK
| | - Ana E. Figueiredo
- Department of Medicine, Peking University First Hospital, Beijing, China; Pontifícia Universidade Católica do Rio Grande do Sul, Hammersmith Hospital, London, UK
| | - Yasuhiko Ito
- FAENFI, Porto Alegre, Brazil; Division of Nephrology, Hammersmith Hospital, London, UK
| | - Rumeyza Kazancioglu
- Nagoya University Graduate School of Medicine, Nagoya, Japan; Division of Nephrology, Hammersmith Hospital, London, UK
| | - Thyago Moraes
- Bezmialem Vakif University, Medical Faculty, Istanbul, Turkey; Pontifícia Universidade Católica do Paraná, Hammersmith Hospital, London, UK
| | - Sadie Van Esch
- Curitiba, Brazil; Elisabeth Tweesteden Hospital, Hammersmith Hospital, London, UK
| | - Edwina A. Brown
- Nephrology Department and Internal Medicine, Tilburg, Netherlands; and Imperial College Renal and Transplant Centre, Hammersmith Hospital, London, UK
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32
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Neoh KG, Li M, Kang ET, Chiong E, Tambyah PA. Surface modification strategies for combating catheter-related complications: recent advances and challenges. J Mater Chem B 2017; 5:2045-2067. [DOI: 10.1039/c6tb03280j] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
This review summarizes the progress made in addressing bacterial colonization and other surface-related complications arising from catheter use.
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Affiliation(s)
- Koon Gee Neoh
- Department of Chemical and Biomolecular Engineering
- National University of Singapore
- Singapore 119077
| | - Min Li
- Department of Chemical and Biomolecular Engineering
- National University of Singapore
- Singapore 119077
| | - En-Tang Kang
- Department of Chemical and Biomolecular Engineering
- National University of Singapore
- Singapore 119077
| | - Edmund Chiong
- Department of Surgery
- National University of Singapore
- Singapore 119077
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Biosynthesis, Characterization and Antibacterial Effect of Phenolics-Coated Silver Nanoparticles Using Cassia javanica L. J CLUST SCI 2016. [DOI: 10.1007/s10876-016-1016-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Loo CY, Rohanizadeh R, Young PM, Traini D, Cavaliere R, Whitchurch CB, Lee WH. Combination of Silver Nanoparticles and Curcumin Nanoparticles for Enhanced Anti-biofilm Activities. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2016; 64:2513-22. [PMID: 26595817 DOI: 10.1021/acs.jafc.5b04559] [Citation(s) in RCA: 101] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Biofilm tolerance has become a serious clinical concern in the treatment of nosocomial pneumonia owing to the resistance to various antibiotics. There is an urgent need to develop alternative antimicrobial agents or combination drug therapies that are effective via different mechanisms. Silver nanoparticles (AgNPs) have been developed as an anti-biofilm agent for the treatment of infections associated with the use of mechanical ventilations, such as endotracheal intubation. Meanwhile curcumin, a phenolic plant extract, has displayed natural anti-biofilm properties through the inhibition of bacterial quorum sensing systems. The aim of this study was to investigate the possible synergistic/additive interactions of AgNPs and curcumin nanoparticles (Cur-NPs) against both Gram-negative (Pseudomonas aeruginosa) and Gram-positive (Staphylococcus aureus) microorganisms. The combination of AgNPs and Cur-NPs (termed Cur-SNPs) at 100 μg/mL disrupted 50% of established bacterial biofilms (formed on microtiter plates). However, further increase in the concentration of Cur-SNPs failed to effectively eliminate the biofilms. To achieve the same effect, at least 500 μg/mL Cur-NP alone was needed. Scanning electron microscopy (SEM) and confocal laser scanning microscopy (CLSM) revealed that combination therapy (Cur-SNPs) was the most potent to eradicate preformed biofilm compared to monodrug therapy. These agents are also nontoxic to healthy human bronchial epithelial cells (BEAS2B).
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Affiliation(s)
- Ching-Yee Loo
- Respiratory Technology, Woolcock Institute of Medical Research and Discipline of Pharmacology, Sydney Medical School, The University of Sydney , Sydney, NSW 2037, Australia
- Faculty of Pharmacy, University of Sydney , Sydney, NSW 2006, Australia
| | - Ramin Rohanizadeh
- Faculty of Pharmacy, University of Sydney , Sydney, NSW 2006, Australia
| | - Paul M Young
- Respiratory Technology, Woolcock Institute of Medical Research and Discipline of Pharmacology, Sydney Medical School, The University of Sydney , Sydney, NSW 2037, Australia
| | - Daniela Traini
- Respiratory Technology, Woolcock Institute of Medical Research and Discipline of Pharmacology, Sydney Medical School, The University of Sydney , Sydney, NSW 2037, Australia
| | - Rosalia Cavaliere
- The ithree institute, University of Technology Sydney , Ultimo, NSW 2007, Australia
| | - Cynthia B Whitchurch
- The ithree institute, University of Technology Sydney , Ultimo, NSW 2007, Australia
| | - Wing-Hin Lee
- Respiratory Technology, Woolcock Institute of Medical Research and Discipline of Pharmacology, Sydney Medical School, The University of Sydney , Sydney, NSW 2037, Australia
- Faculty of Pharmacy, University of Sydney , Sydney, NSW 2006, Australia
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35
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Singh D, Rawat D, Isha. Microwave-assisted synthesis of silver nanoparticles from Origanum majorana and Citrus sinensis leaf and their antibacterial activity: a green chemistry approach. BIORESOUR BIOPROCESS 2016. [DOI: 10.1186/s40643-016-0090-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Silver-nanoparticle-coated biliary stent inhibits bacterial adhesion in bacterial cholangitis in swine. Hepatobiliary Pancreat Dis Int 2016; 15:87-92. [PMID: 26818548 DOI: 10.1016/s1499-3872(15)60410-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
BACKGROUND One of the major limitations of biliary stents is the stent occlusion, which is closely related to the over-growth of bacteria. This study aimed to evaluate the feasibility of a novel silver-nanoparticle-coated polyurethane (Ag/PU) stent in bacterial cholangitis model in swine. METHODS Ag/PU was designed by coating silver nanoparticles on polyurethane (PU) stent. Twenty-four healthy pigs with bacterial cholangitis using Ag/PU and PU stents were randomly divided into an Ag/PU stent group (n=12) and a PU stent group (n=12), respectively. The stents were inserted by standard endoscopic retrograde cholangiopancreatography. Laboratory assay was performed for white blood cell (WBC) count, alanine aminotransferase (ALT), interleukin-1beta (IL-1beta), tumor necrosis factor-alpha (TNF-alpha) at baseline time, 8 hours, 1, 2, 3, and 7 days after stent placements. The segment of bile duct containing the stent was examined histologically ex vivo. Implanted biliary stents were examined by a scan electron microscope. The amount of silver release was also measured in vitro. RESULTS The number of inflammatory cells and level of ALT, IL-1beta and TNF-alpha were significantly lower in the Ag/PU stent group than in the PU stent group. Hyperplasia of the mucosa was more severe in the PU stent group than in the Ag/PU stent group. In contrast to the biofilm of bacteria on the PU stent, fewer bacteria adhered to the Ag/PU stent. CONCLUSIONS PU biliary stents modified with silver nanoparticles are able to alleviate the inflammation of pigs with bacterial cholangitis. Silver-nanoparticle-coated stents are resistant to bacterial adhesion.
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37
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Tsou CH, Lee HT, Hung WS, Wang CC, Shu CC, Suen MC, De Guzman M. Synthesis and properties of antibacterial polyurethane with novel Bis(3-pyridinemethanol) silver chain extender. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.01.042] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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38
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Liu L, Ercan B, Sun L, Ziemer KS, Webster TJ. Understanding the Role of Polymer Surface Nanoscale Topography on Inhibiting Bacteria Adhesion and Growth. ACS Biomater Sci Eng 2015; 2:122-130. [DOI: 10.1021/acsbiomaterials.5b00431] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Batur Ercan
- Department
of Metallurgical and Materials Engineering, Middle East Technical University, Ankara, 06800, Turkey
| | - Linlin Sun
- Wenzhou
Institute of Biomaterials and Engineering, Wenzhou Medical University, Wenzhou, China
| | | | - Thomas J. Webster
- Center
of Excellence for Advanced Materials Research, King Abdulaziz University, Jeddah 21589, Saudi Arabia
- Wenzhou
Institute of Biomaterials and Engineering, Wenzhou Medical University, Wenzhou, China
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39
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Shaban SM, Aiad I, El-Sukkary MM, Soliman E, El-Awady MY. Preparation of capped silver nanoparticles using sunlight and cationic surfactants and their biological activity. CHINESE CHEM LETT 2015. [DOI: 10.1016/j.cclet.2015.06.006] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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40
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Yallappa S, Manjanna J, Dhananjaya BL, Vishwanatha U, Ravishankar B, Gururaj H, Niranjana P, Hungund BS. Phytochemically Functionalized Cu and Ag Nanoparticles Embedded in MWCNTs for Enhanced Antimicrobial and Anticancer Properties. NANO-MICRO LETTERS 2015; 8:120-130. [PMID: 30460271 PMCID: PMC6223673 DOI: 10.1007/s40820-015-0066-0] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Accepted: 09/07/2015] [Indexed: 05/20/2023]
Abstract
Nanomedicine is an emerging field concerned with the use of precision engineered nanomaterials, which leads to the development of novel remedial and diagnostic modalities for human use. In this study, Cu(NO3)2 and AgNO3 precursors were reduced to copper nanoparticles (CuNPs) and silver nanoparticles (AgNPs) using Terminalia arjuna bark extracts under microwave irradiation in the presence of well-dispersed multi-walled carbon nanotubes (MWCNTs) in aqueous medium. The formation of CuNPs or AgNPs and their functionalization with MWCNTs via bioactive molecules of plant extract were evidenced from UV-Vis spectra, XRD, FTIR, FESEM, EDX, and TEM images. The phytochemically functionalized Cu-MWCNTs and Ag-MWCNTs nanomaterials showed enhanced biocide activity, and the inhibitory activity for bacteria was higher than that of fungus. Furthermore, these biohybrid nanomaterials are non-toxic to normal epithelial cells (Vero), whereas they are highly toxic for tested human cancer cells of MDA-MB-231, HeLa, SiHa, and Hep-G2. The cell viability was found to decrease with the increasing dose from 10 to 50 µg mL-1, as well as incubation time from 24 to 72 h. For instance, the cell viability was found to be ~91 % for normal Vero cells and ~76 % for cancer cells for lower dose of 10 µg mL-1.
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Affiliation(s)
- S. Yallappa
- Department of Industrial Chemistry, Kuvempu University, Shankaraghatta, Shimoga-Dist, 577 451 India
| | - J. Manjanna
- Department of Chemistry, Rani Channamma University, Belagavi, 591 156 India
| | - B. L. Dhananjaya
- Toxicology and Drug Discovery Centre for Emerging Technologies, Jain University, Ramanagara, 562 112 India
| | - U. Vishwanatha
- SDM Centre for Research in Ayurveda and Allied Sciences, Udupi, 574 118 India
| | - B. Ravishankar
- SDM Centre for Research in Ayurveda and Allied Sciences, Udupi, 574 118 India
| | - H. Gururaj
- Department of Electronics, Kuvempu University, Shankarghatta, 577 451 India
| | - P. Niranjana
- Department of Biochemistry, Kuvempu University, Shankarghatta, 577 451 India
| | - B. S. Hungund
- Department of Biotechnology, B.V.B. College of Engineering & Technology, Hubli, 580 031 India
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41
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Fluorescence Quenching of Perylene DBPI Dye by Colloidal Low-Dimensional Gold Nanoparticles. J Fluoresc 2015; 25:973-8. [DOI: 10.1007/s10895-015-1578-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Accepted: 05/04/2015] [Indexed: 10/23/2022]
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Ghorbanzadeh R, Pourakbari B, Bahador A. Effects of Baseplates of Orthodontic Appliances with in situ generated Silver Nanoparticles on Cariogenic Bacteria: A Randomized, Double-blind Cross-over Clinical Trial. J Contemp Dent Pract 2015; 16:291-8. [PMID: 26067732 DOI: 10.5005/jp-journals-10024-1678] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
AIM Polymethyl-methacrylate (PMMA) is commonly used primarily for baseplates of orthodontic appliances (BOA). The activities of cariogenic bacteria in biofilm on these surfaces may contribute to dental caries, gingival inflammation and periodontal disease. The PMMA incorporated with nanoparticles of silver (NanoAg-I-PMMA) and NanoAg in situ in PMMA (NanoAg-IS-PMMA) have been shown to control the growth of cariogenic bacteria, but clinical trial of anti-cariogenic application of these novel materials in orthodontics has not been evaluated. The main aim of the study is to compare the clinical effectiveness of using NanoAg-IS-PMMA and NanoAg-I-PMMA for construction of new BOA in inhibiting the planktonic growth and biofilm formation of the cariogenic bacteria. MATERIALS AND METHODS Twenty four patients with a median age of 12.6 years (7-15) harboring Streptococcus mutans, Streptococcus sobrinus and Lactobacillus acidophilus as well as Lactobacillus casei participated in the randomized, double-blind, cross-over study. The experimental BOA, NanoAg-IS-BOA and NanoAg-I-BOA, contained 0.5% w/w NanoAg while the control BOA was standard PMMA. Antibacterial effect of NanoAg-IS-BOA and NanoAg-I-BOA was assessed against test cariogenic bacteria by planktonic and biofilm bacterial cells growth inhibition. RESULTS The average levels of test cariogenic bacteria in saliva decreased about 2 to 70 fold (30.9-98.4%) compared to baseline depending on the microorganism type and test BOA. Biofilm inhibition analysis demonstrated that NanoAg-I-BOA and NanoAg-IS-BOA inhibited the biofilm of all test bacteria by 20.1 to 79.9% compared to BOA. NanoAg-IS-BOA had a strong anti-biofilm effect against S. mutans, S. sobrinus and L. casei. However, NanoAg-I-BOA showed only slight anti-biofilm effects on test bacteria. Most notably, at all period of the clinical trial, NanoAg-IS-BOA showed a higher antibacterial activity than NanoAg-I-BOA. CONCLUSION Based on the novel data that presented here, the NanoAg-IS-BOA had strong antimicrobial activity in the planktonic phase and subsequent biofilm formation of the cariogenic bacteria. CLINICAL SIGNIFICANCE Wearing of NanoAg-IS-BOA has the potential to minimize dental plaque formation and caries during orthodontic treatment.
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Affiliation(s)
| | - Babak Pourakbari
- Pediatrics Infectious Disease Research Center, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Abbas Bahador
- Abbas Bahador, Department of Medical Microbiology, Faculty of Medicine Tehran University of Medical Sciences, Tehran, Iran, Phone: 0098-21-77326397, Fax: 0098-21-88955810, e-mail:
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Fisher LE, Hook AL, Ashraf W, Yousef A, Barrett DA, Scurr DJ, Chen X, Smith EF, Fay M, Parmenter CDJ, Parkinson R, Bayston R. Biomaterial modification of urinary catheters with antimicrobials to give long-term broadspectrum antibiofilm activity. J Control Release 2015; 202:57-64. [PMID: 25639970 DOI: 10.1016/j.jconrel.2015.01.037] [Citation(s) in RCA: 105] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2014] [Revised: 01/26/2015] [Accepted: 01/28/2015] [Indexed: 10/24/2022]
Abstract
Catheter-associated urinary tract infection (CAUTI) is the commonest hospital-acquired infection, accounting for over 100,000 hospital admissions within the USA annually. Biomaterials and processes intended to reduce the risk of bacterial colonization of the catheters for long-term users have not been successful, mainly because of the need for long duration of activity in flow conditions. Here we report the results of impregnation of urinary catheters with a combination of rifampicin, sparfloxacin and triclosan. In flow experiments, the antimicrobial catheters were able to prevent colonization by common uropathogens Proteus mirabilis, Staphylococcus aureus and Escherichia coli for 7 to 12weeks in vitro compared with 1-3days for other, commercially available antimicrobial catheters currently used clinically. Resistance development was minimized by careful choice of antimicrobial combinations. Drug release profiles and distribution in the polymer, and surface analysis were also carried out and the process had no deleterious effect on the mechanical performance of the catheter or its balloon. The antimicrobial catheter therefore offers for the first time a means of reducing infection and its complications in long-term urinary catheter users.
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Affiliation(s)
- Leanne E Fisher
- Biomaterials-Related Infection Group, School of Medicine, Nottingham University Hospitals, Queen's Medical Centre, Nottingham NG7 2UH, UK.
| | - Andrew L Hook
- Laboratory of Biophysics and Surface Analysis, School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK.
| | - Waheed Ashraf
- Biomaterials-Related Infection Group, School of Medicine, Nottingham University Hospitals, Queen's Medical Centre, Nottingham NG7 2UH, UK.
| | - Anfal Yousef
- Biomaterials-Related Infection Group, School of Medicine, Nottingham University Hospitals, Queen's Medical Centre, Nottingham NG7 2UH, UK.
| | - David A Barrett
- Centre for Analytical Bioscience, School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK.
| | - David J Scurr
- Laboratory of Biophysics and Surface Analysis, School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK.
| | - Xinyong Chen
- Laboratory of Biophysics and Surface Analysis, School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK.
| | - Emily F Smith
- Nottingham Nanotechnology & Nanoscience Centre, University of Nottingham, Nottingham NG7 2RD, UK.
| | - Michael Fay
- Nottingham Nanotechnology & Nanoscience Centre, University of Nottingham, Nottingham NG7 2RD, UK.
| | | | - Richard Parkinson
- Nottingham Urology Centre, Nottingham University Hospitals NHS Trust, Nottingham NG5 1PB, UK.
| | - Roger Bayston
- Biomaterials-Related Infection Group, School of Medicine, Nottingham University Hospitals, Queen's Medical Centre, Nottingham NG7 2UH, UK.
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44
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Sedki M, Mohamed MB, Fawzy M, Abdelrehim DA, Abdel-Mottaleb MMSA. Phytosynthesis of silver–reduced graphene oxide (Ag–RGO) nanocomposite with an enhanced antibacterial effect using Potamogeton pectinatus extract. RSC Adv 2015. [DOI: 10.1039/c4ra13117g] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Green synthesized silver–reduced graphene oxide (Ag–RGO) nanocomposite using Potamogeton pectinatus (Po) plant extract.
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Affiliation(s)
| | - Mona B. Mohamed
- The National Institute of Laser Enhanced Sciences
- Cairo University
- Cairo
- Egypt
| | - Manal Fawzy
- Faculty of Science
- Environmental Sciences Department
- Alexandria University
- Alexandria
- Egypt
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45
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Screening of cyanobacteria and microalgae for their ability to synthesize silver nanoparticles with antibacterial activity. ACTA ACUST UNITED AC 2014. [PMID: 28626689 PMCID: PMC5466195 DOI: 10.1016/j.btre.2014.12.001] [Citation(s) in RCA: 152] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The aim of this study was to assess the ability of selected strains of cyanobacteria and microalgae to biosynthesize silver nanoparticles (Ag-NPs) by using two procedures; (i) suspending the live and washed biomass of microalgae and cyanobacteria into the AgNO3 solution and (ii) by adding AgNO3 into a cell-free culture liquid. Ag-NPs were biosynthesized by 14 out of 16 tested strains. In most of the cases Ag-NPs were formed both in the presence of biomass as well as in the cell-free culture liquid. This indicates that the process of Ag-NPs formation involves an extracellular compound such as polysaccharide. TEM analysis showed that the nanoparticles were embedded within an organic matrix. Ag-NPs varied in shape and sizes that ranged between 13 and 31 nm, depending on the organism used. The antibacterial activity of Ag-NPs was confirmed in all but one strain of cyanobacterium (Limnothrix sp. 37-2-1) which formed the largest particles.
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46
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Chen CW, Hsu CY, Lai SM, Syu WJ, Wang TY, Lai PS. Metal nanobullets for multidrug resistant bacteria and biofilms. Adv Drug Deliv Rev 2014; 78:88-104. [PMID: 25138828 DOI: 10.1016/j.addr.2014.08.004] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2013] [Revised: 06/27/2014] [Accepted: 08/11/2014] [Indexed: 12/19/2022]
Abstract
Infectious diseases were one of the major causes of mortality until now because drug-resistant bacteria have arisen under broad use and abuse of antibacterial drugs. These multidrug-resistant bacteria pose a major challenge to the effective control of bacterial infections and this threat has prompted the development of alternative strategies to treat bacterial diseases. Recently, use of metallic nanoparticles (NPs) as antibacterial agents is one of the promising strategies against bacterial drug resistance. This review first describes mechanisms of bacterial drug resistance and then focuses on the properties and applications of metallic NPs as antibiotic agents to deal with antibiotic-sensitive and -resistant bacteria. We also provide an overview of metallic NPs as bactericidal agents combating antibiotic-resistant bacteria and their potential in vivo toxicology for further drug development.
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Affiliation(s)
- Ching-Wen Chen
- Department of Chemistry, National Chung Hsing University, 250, Kuo Kuang Rd., Taichung 402, Taiwan
| | - Chia-Yen Hsu
- Department of Chemistry, National Chung Hsing University, 250, Kuo Kuang Rd., Taichung 402, Taiwan
| | - Syu-Ming Lai
- Department of Chemistry, National Chung Hsing University, 250, Kuo Kuang Rd., Taichung 402, Taiwan
| | - Wei-Jhe Syu
- Department of Chemistry, National Chung Hsing University, 250, Kuo Kuang Rd., Taichung 402, Taiwan
| | - Ting-Yi Wang
- Department of Chemistry, National Chung Hsing University, 250, Kuo Kuang Rd., Taichung 402, Taiwan
| | - Ping-Shan Lai
- Department of Chemistry, National Chung Hsing University, 250, Kuo Kuang Rd., Taichung 402, Taiwan; Research Center for Sustainable Energy and Nanotechnology, National Chung Hsing University, 250, Kuo Kuang Rd., Taichung 402, Taiwan.
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47
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Ghosh T, Das AB, Jena B, Pradhan C. Antimicrobial effect of silver zinc oxide (Ag-ZnO) nanocomposite particles. FRONTIERS IN LIFE SCIENCE 2014. [DOI: 10.1080/21553769.2014.952048] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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48
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Shirai T, Tsuchiya H, Nishida H, Yamamoto N, Watanabe K, Nakase J, Terauchi R, Arai Y, Fujiwara H, Kubo T. Antimicrobial megaprostheses supported with iodine. J Biomater Appl 2014; 29:617-23. [PMID: 24913616 DOI: 10.1177/0885328214539365] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Deep infection associated with implants remains a serious complication of orthopedic surgery. We developed iodine coating for titanium implants. In this study, we performed a clinical trial of iodine-coated megaprostheses to evaluate its safety and antibacterial effects. Forty-seven patients with malignant bone tumor or pyogenic arthritis were treated using iodine-supported titanium megaprostheses between July 2008 and May 2013. The mean age was 53.6 years (range, 15-85 years). Twenty-six patients were males and 21 were females. The diagnoses included malignant bone tumor in 29 cases, infected total knee arthroplasty in 11 cases, chronic osteomyelitis due to pyogenic arthritis in six cases and loosening of total knee arthroplasty in one case. The iodine-supported implants used were 42 Kyocera Limb Salvage System and five KOBELCO K-MAX K-3. These megaprostheses were used to prevent infection in 21 patients, treat active infections in 26 patients. The mean follow-up period was 30.1 months (range, 8-50). Infection was prevented in 20 out of 21 patients. Only one patient had surgical site infection caused by Pseudomonas aeruginosa and was cured by intravenous administration of antibiotics alone without removal of the implant. In 26 treatment cases involving one- or two-stage revision surgery, infection subsided without any additional surgery. In all cases, there were no signs of infection at the time of the last follow-up. White blood cell and C-reactive protein levels returned to normal within four weeks after surgery. To confirm systemic effects of iodine, thyroid hormone levels in the blood were examined. Abnormalities of thyroid gland function were not detected. Loosening of the implants was not observed. Excellent bone ingrowth and ongrowth were found around iodine-supported megaprostheses. The iodine-supported titanium megaprostheses are highly effective and show promise for the prevention and treatment of infections in large bone defects. No cytotoxicity or adverse effects were detected with this treatment.
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Affiliation(s)
- Toshiharu Shirai
- Department of Orthopaedic Surgery, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto, Japan
| | - Hiroyuki Tsuchiya
- Department of Orthopaedic Surgery, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan
| | - Hideji Nishida
- Department of Orthopaedic Surgery, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan
| | - Norio Yamamoto
- Department of Orthopaedic Surgery, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan
| | - Koji Watanabe
- Department of Orthopaedic Surgery, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan
| | - Junsuke Nakase
- Department of Orthopaedic Surgery, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan
| | - Ryu Terauchi
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto, Japan
| | - Yuji Arai
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto, Japan
| | - Hiroyoshi Fujiwara
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto, Japan
| | - Toshikazu Kubo
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto, Japan
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49
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Pandey JK, Swarnkar RK, Soumya KK, Dwivedi P, Singh MK, Sundaram S, Gopal R. Silver nanoparticles synthesized by pulsed laser ablation: as a potent antibacterial agent for human enteropathogenic gram-positive and gram-negative bacterial strains. Appl Biochem Biotechnol 2014; 174:1021-31. [PMID: 24801405 DOI: 10.1007/s12010-014-0934-y] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2014] [Accepted: 04/21/2014] [Indexed: 10/25/2022]
Abstract
Present investigation deals with the study, to quantify the antibacterial property of silver nanoparticles (SNPs), synthesized by pulsed laser ablation (PLA) in aqueous media, on some human enteropathogenic gram-positive and gram-negative bacterial strains. Antibacterial property was studied by measuring the zone of inhibition using agar cup double-diffusion method, minimum inhibitory concentration by serial dilution method, and growth curve for 24 h. The results clearly show the potency of antibacterial property of PLA-synthesized SNPs and suggest that it can be used as an effective growth inhibitor against various pathogenic bacterial strains in various medical devices and antibacterial control systems.
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Affiliation(s)
- Jitendra Kumar Pandey
- Laser Spectroscopy and Nanomaterials Lab, Department of Physics (UGC-CAS), University of Allahabad, Allahabad, 211002, India,
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50
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Mwilu SK, Siska E, Baig RBN, Varma RS, Heithmar E, Rogers KR. Separation and measurement of silver nanoparticles and silver ions using magnetic particles. THE SCIENCE OF THE TOTAL ENVIRONMENT 2014; 472:316-23. [PMID: 24295749 DOI: 10.1016/j.scitotenv.2013.10.077] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Revised: 10/22/2013] [Accepted: 10/22/2013] [Indexed: 05/13/2023]
Abstract
The recent surge in consumer products and applications using metallic nanoparticles has increased the possibility of human or ecosystem exposure due to unintentional release into the environment. To protect consumer health and the environment, there is an urgent need to develop tools that can characterize and quantify these materials at low concentrations and in complex matrices. In this study, magnetic nanoparticles coated with either dopamine or glutathione were used to develop a new, simple and reliable method for the separation/pre-concentration of trace amounts of silver nanoparticles followed by their quantification using inductively coupled plasma mass spectrometry (ICP-MS). The structurally modified magnetic particles were able to capture trace amounts of silver nanoparticles (~2 ppb) and concentrate (up to 250 times) the particles for analysis with ICP-MS. Under laboratory conditions, recovery of silver nanoparticles was >99%. More importantly, the magnetic particles selectively captured silver nanoparticles in a mixture containing both nano-particulate and ionic silver. This unique feature addresses the challenges of separation and quantification of silver nanoparticles in addition to the total silver in environmental samples. Spiking experiments showed recoveries higher than 97% for tap water and both fresh and saline surface water.
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Affiliation(s)
- Samuel K Mwilu
- U.S. Environmental Protection Agency, Las Vegas, NV, USA
| | - Emily Siska
- U.S. Environmental Protection Agency, Las Vegas, NV, USA
| | - R B Nasir Baig
- U.S. Environmental Protection Agency, Cincinnati, OH, USA
| | | | - Ed Heithmar
- U.S. Environmental Protection Agency, Las Vegas, NV, USA
| | - Kim R Rogers
- U.S. Environmental Protection Agency, Research Triangle Park, NC, USA.
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