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Sarraj S, Szymiczek M, Jurczyk S. Influence of Herbal Fillers Addition on Selected Properties of Silicone Subjected to Accelerated Aging. Polymers (Basel) 2022; 15:polym15010042. [PMID: 36616391 PMCID: PMC9823497 DOI: 10.3390/polym15010042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 12/16/2022] [Accepted: 12/18/2022] [Indexed: 12/24/2022] Open
Abstract
This work aims to assess the impact of the type and percentage of powdered herbs on selected properties of silicone-based composites. The matrix was an addition cross-linked platinum-cured polydimethylsiloxane. The fillers were powdered thyme and sage, which were introduced at 5, 10, and 15 wt.%. The introduced fillers differed in composition, morphology, and grain size. The grain morphology showed differences in the size and shape of the introduced fillers. The qualitative and quantitative assessment resulting from the incorporation was conducted based on tests of selected properties: density, wettability, rebound resilience, hardness, and tensile strength. The incorporation slightly affected the density and wettability of the silicone. Rebound resilience and hardness results differed depending on the filler type and fraction. However, tensile strength decreased, which may be due to the matrix's distribution of fillers and their chemical composition. Antibacterial activity evaluation against S. aureus proved the bacteriostatic properties of the composites. Accelerated aging in PBS solution further deteriorated the mechanical properties. FTIR and DSC have demonstrated the progressive aging of the materials. In addition, the results showed an overall minimal effect of fillers on the silicone chemical backbone and melting temperature. The developed materials can be used in applications that do not require high mechanical properties.
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Affiliation(s)
- Sara Sarraj
- Department of Theoretical and Applied Mechanics, Silesian University of Technology, Konarskiego 18A, 44-100 Gliwice, Poland
- Correspondence: ; Tel.: +48-32-237-13-48
| | - Małgorzata Szymiczek
- Department of Theoretical and Applied Mechanics, Silesian University of Technology, Konarskiego 18A, 44-100 Gliwice, Poland
| | - Sebastian Jurczyk
- Łukasieiwcz Research Network—Institute for Engineering of Polymer Materials and Dyes, M. Sklodowska-Curie 55, 87-100 Toruń, Poland
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2
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In Silico Studies on Zinc Oxide Based Nanostructured Oil Carriers with Seed Extracts of Nigella sativa and Pimpinella anisum as Potential Inhibitors of 3CL Protease of SARS-CoV-2. Molecules 2022; 27:molecules27134301. [PMID: 35807545 PMCID: PMC9268682 DOI: 10.3390/molecules27134301] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 06/22/2022] [Accepted: 06/29/2022] [Indexed: 02/01/2023] Open
Abstract
Coming into the second year of the pandemic, the acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and its variants continue to be a serious health hazard globally. A surge in the omicron wave, despite the discovery of the vaccines, has shifted the attention of research towards the discovery and use of bioactive compounds, being potential inhibitors of the viral structural proteins. The present study aimed at the green synthesis of zinc oxide (ZnO) nanoparticles with seed extracts of Nigella sativa and Pimpinella anisum—loaded nanostructured oil carriers (NLC)—using a mixture of olive and black seed essential oils. The synthesized ZnO NLC were extensively characterized. In addition, the constituent compounds in ZnO NLC were investigated as a potential inhibitor for the SARS-CoV-2 main protease (3CLpro or Mpro) where 27 bioactive constituents, along with ZnO in the nanostructure, were subjected to molecular docking studies. The resultant high-score compounds were further validated by molecular dynamics simulation. The study optimized the compounds dithymoquinone, δ-hederin, oleuropein, and zinc oxide with high docking energy scores (ranging from −7.9 to −9.9 kcal/mol). The RMSD and RMSF data that ensued also mirrored these results for the stability of proteins and ligands. RMSD and RMSF data showed no conformational change in the protein during the MD simulation. Histograms of every simulation trajectory explained the ligand properties and ligand–protein contacts. Nevertheless, further experimental investigations and validation of the selected candidates are imperative to take forward the applicability of the nanostructure as a potent inhibitor of COVID-19 (Coronavirus Disease 2019) for clinical trials.
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3
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Wang Y, Zhang Q, Tan Y, Lv W, Zhao C, Xiong M, Hou K, Wu M, Ren Y, Zeng N, Wu Y. Current Progress in Breast Implant-Associated Anaplastic Large Cell Lymphoma. Front Oncol 2022; 11:785887. [PMID: 35070989 PMCID: PMC8770274 DOI: 10.3389/fonc.2021.785887] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Accepted: 12/13/2021] [Indexed: 11/13/2022] Open
Abstract
Breast implant-associated anaplastic large-cell lymphoma (BIA-ALCL) is an uncommon type of T-cell lymphoma. Although with a low incidence, the epidemiological data raised the biosafety and health concerns of breast reconstruction and breast augmentation for BIA-ALCL. Emerging evidence confirms that genetic features, bacterial contamination, chronic inflammation, and textured breast implant are the relevant factors leading to the development of BIA-ALCL. Almost all reported cases with a medical history involve breast implants with a textured surface, which reflects the role of implant surface characteristics in BIA-ALCL. With this review, we expect to highlight the most significant features on etiology, pathogenesis, diagnosis, and therapy of BIA-ALCL, as well as we review the physical characteristics of breast implants and their potential pathogenic effect and hopefully provide a foundation for optimal choice of type of implant with minimal morbidity.
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Affiliation(s)
| | | | | | | | | | | | | | - Min Wu
- Department of Plastic and Cosmetic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yuping Ren
- Department of Plastic and Cosmetic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Ning Zeng
- Department of Plastic and Cosmetic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yiping Wu
- *Correspondence: Yiping Wu, ; Min Wu, ; Yuping Ren, ; Ning Zeng,
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4
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Lam M, Migonney V, Falentin-Daudre C. Review of silicone surface modification techniques and coatings for antibacterial/antimicrobial applications to improve breast implant surfaces. Acta Biomater 2021; 121:68-88. [PMID: 33212233 DOI: 10.1016/j.actbio.2020.11.020] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 11/12/2020] [Accepted: 11/12/2020] [Indexed: 12/19/2022]
Abstract
Silicone implants are widely used in the medical field for plastic or reconstructive surgeries for the purpose of soft tissue issues. However, as with any implanted object, healthcare-associated infections are not completely avoidable. The material suffers from a lack of biocompatibility and is often subject to bacterial/microbial infections characterized by biofilm growth. Numerous strategies have been developed to either prevent, reduce, or fight bacterial adhesion by providing an antibacterial property. The present review summarizes the diverse approaches to deal with bacterial infections on silicone surfaces along with the different methods to activate/oxidize the surface before any surface modifications. It includes antibacterial coatings with antibiotics or nanoparticles, covalent attachment of active bacterial molecules like peptides or polymers. Regarding silicone surfaces, the activation step is essential to render the surface reactive for any further modifications using energy sources (plasma, UV, ozone) or chemicals (acid solutions, sol-gel strategies, chemical vapor deposition). Meanwhile, corresponding work on breast silicone prosthesis is discussed. The latter is currently in the line of sight for causing severe capsular contractures. Specifically, to that end, besides chemical modifications, the antibacterial effect can also be achieved by physical surface modifications by adjusting the surface roughness and topography for instance.
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5
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Abebe B, Murthy HCA, Zereffa EA. Multifunctional application of PVA-aided Zn-Fe-Mn coupled oxide nanocomposite. NANOSCALE RESEARCH LETTERS 2021; 16:1. [PMID: 33387075 PMCID: PMC7778673 DOI: 10.1186/s11671-020-03464-0] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Accepted: 12/11/2020] [Indexed: 05/28/2023]
Abstract
Zinc oxide (ZnO) is a fascinating semiconductor material with many applications such as adsorption, photocatalysis, sensor, and antibacterial activities. By using a poly (vinyl alcohol) (PVA) polymer as a capping agent and metal oxides (iron and manganese) as a couple, the porous PVA-aided Zn/Fe/Mn ternary oxide nanocomposite material (PTMO-NCM) was synthesized. The thermal, optical, crystallinity, chemical bonding, porosity, morphological, charge transfer properties of the synthesized materials were confirmed by DTG/DSC, UV-Vis-DRS, XRD, FT-IR, BET, SEM-EDAX/TEM-HRTEM-SAED, and CV/EIS/amperometric analytical techniques, respectively. The PTMO-NCM showed an enhanced surface area and charge transfer capability, compared to ZnO. Using the XRD pattern and TEM image analysis, the crystalline size of the materials was confirmed to be in the nanometer range. The porosity and superior charge transfer capabilities of the PTMO-NCM were confirmed from the BET, HRTEM (IFFT)/SAED, and CV/EIS analysis. The adsorption kinetics (adsorption reaction/adsorption diffusion) and adsorption isotherm test confirmed the presence of a chemisorption type of adsorbate/methylene blue dye-adsorbent/PTMO-NCM interaction. The photocatalytic performance was tested on the Congo red and Acid Orange-8 dyes. The superior ascorbic acid sensing capability of the material was understood from CV and amperometric analysis. The noble antibacterial activities of the material were also confirmed on both gram-negative and gram-positive bacteria.
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Affiliation(s)
- Buzuayehu Abebe
- Department of Applied Chemistry, School of Applied Natural Science, Adama Science and Technology University, P O Box 1888, Adama, Ethiopia.
| | - H C Ananda Murthy
- Department of Applied Chemistry, School of Applied Natural Science, Adama Science and Technology University, P O Box 1888, Adama, Ethiopia.
| | - Enyew Amare Zereffa
- Department of Applied Chemistry, School of Applied Natural Science, Adama Science and Technology University, P O Box 1888, Adama, Ethiopia
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Bhattacharya P, Dey A, Neogi S. An insight into the mechanism of antibacterial activity by magnesium oxide nanoparticles. J Mater Chem B 2021; 9:5329-5339. [PMID: 34143165 DOI: 10.1039/d1tb00875g] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The exact mechanism behind the antibacterial efficacy of nanoparticles has remained unexplored to date. This study aims to shed light the mechanism adopted using magnesium oxide nanoparticles prepared in ethyl alcohol against gram-negative and gram-positive bacterial cells, and the generation of reactive oxygen species (ROS) is proposed to be the dominant mechanism. This paradigm is supported by the quantification of the hydroxyl radical and superoxide anions produced in the nanoparticle treated and untreated bacterial solutions, and by the reduction of the antibacterial efficiency after the addition of a radical scavenger. The production of free Mg2+ ions from the nanoparticle is supposed to be the causative agent behind this uncontrolled ROS generation, resulting in excessive oxidative stress, which the antioxidants of the bacterial cells are unable to nullify, leading to cell damage. The amount of proteins, carbohydrates and lipids leaked due to the distortion of the cellular membrane is also quantified, and it is observed that their leakage trend varies on the structure of the bacterial cell. FESEM images taken at certain time intervals show the gradual internalization of the nanoparticles, and increasing rupture of bacterial cell membranes, leading to cell necrosis.
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Affiliation(s)
| | - Aishee Dey
- Indian Institute of Technology Kharagpur, 721302, India.
| | - Sudarsan Neogi
- Indian Institute of Technology Kharagpur, 721302, India.
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7
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Ozkan E, Mondal A, Singha P, Douglass M, Hopkins SP, Devine R, Garren M, Manuel J, Warnock J, Handa H. Fabrication of Bacteria- and Blood-Repellent Superhydrophobic Polyurethane Sponge Materials. ACS APPLIED MATERIALS & INTERFACES 2020; 12:51160-51173. [PMID: 33143413 DOI: 10.1021/acsami.0c13098] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Biofilm and thrombus formation on surfaces results in significant morbidity and mortality worldwide, which highlights the importance of the development of efficacious fouling-prevention approaches. In this work, novel highly robust and superhydrophobic coatings with outstanding multiliquid repellency, bactericidal performance, and extremely low bacterial and blood adhesion are fabricated by a simple two-step dip-coating method. The coatings are prepared combining 1H,1H,2H,2H-perfluorooctyltriethoxysilane (FAS-17)-coated hydrophobic zinc oxide and copper nanoparticles to construct hierarchical micro/nanostructures on commercial polyurethane (PU) sponges followed by polydimethylsiloxane (PDMS) treatment that is used to improve the binding degree between the nanoparticles and the sponge surface. The micro/nanotextured samples can repel various liquids including water, milk, coffee, juice, and blood. Relative to the original PU, the superhydrophobic characteristics of the fabricated sponge cause a significant reduction in the adhesion of bacteria (Staphylococcus aureus) by up to 99.9% over a 4-day period in a continuous drip-flow bioreactor. The sponge is also highly resistant to the adhesion of fibrinogen and activated platelets with ∼76 and 64% reduction, respectively, hence reducing the risk of blood coagulation and thrombus formation. More importantly, the sponge can sustain its superhydrophobicity even after being subjected to different types of harsh mechanical damage such as finger-wiping, knife-scratching, tape-peeling, hand-kneading, hand-rubbing, bending, compress-release (1000 cycles) tests, and 1000 cm sandpaper abrasion under 250 g of loading. Hence, this novel hybrid surface with robustness and the ability to resist blood adhesion and bacterial contamination makes it an attractive candidate for use in diverse application areas.
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Affiliation(s)
- Ekrem Ozkan
- School of Chemical, Materials and Biomedical Engineering, College of Engineering, University of Georgia, Athens, Georgia 30602, United States
| | - Arnab Mondal
- School of Chemical, Materials and Biomedical Engineering, College of Engineering, University of Georgia, Athens, Georgia 30602, United States
| | - Priyadarshini Singha
- School of Chemical, Materials and Biomedical Engineering, College of Engineering, University of Georgia, Athens, Georgia 30602, United States
| | - Megan Douglass
- School of Chemical, Materials and Biomedical Engineering, College of Engineering, University of Georgia, Athens, Georgia 30602, United States
| | - Sean P Hopkins
- School of Chemical, Materials and Biomedical Engineering, College of Engineering, University of Georgia, Athens, Georgia 30602, United States
| | - Ryan Devine
- School of Chemical, Materials and Biomedical Engineering, College of Engineering, University of Georgia, Athens, Georgia 30602, United States
| | - Mark Garren
- School of Chemical, Materials and Biomedical Engineering, College of Engineering, University of Georgia, Athens, Georgia 30602, United States
| | - James Manuel
- School of Chemical, Materials and Biomedical Engineering, College of Engineering, University of Georgia, Athens, Georgia 30602, United States
| | - James Warnock
- School of Chemical, Materials and Biomedical Engineering, College of Engineering, University of Georgia, Athens, Georgia 30602, United States
| | - Hitesh Handa
- School of Chemical, Materials and Biomedical Engineering, College of Engineering, University of Georgia, Athens, Georgia 30602, United States
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8
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Thamilvanan D, Jeevanandam J, Hii YS, Chan YS. Sol‐gel coupled ultrasound synthesis of photo‐activated magnesium oxide nanoparticles: Optimization and antibacterial studies. CAN J CHEM ENG 2020. [DOI: 10.1002/cjce.23861] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
| | - Jaison Jeevanandam
- Department of Chemical Engineering Curtin University Malaysia Miri Malaysia
| | - Yiik S. Hii
- Department of Chemical Engineering Curtin University Malaysia Miri Malaysia
| | - Yen S. Chan
- Department of Chemical Engineering Curtin University Malaysia Miri Malaysia
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9
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Sehmi SK, Lourenco C, Alkhuder K, Pike SD, Noimark S, Williams CK, Shaffer MSP, Parkin IP, MacRobert AJ, Allan E. Antibacterial Surfaces with Activity against Antimicrobial Resistant Bacterial Pathogens and Endospores. ACS Infect Dis 2020; 6:939-946. [PMID: 32126763 DOI: 10.1021/acsinfecdis.9b00279] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Hospital-acquired bacterial infections are a significant burden on healthcare systems worldwide causing an increased duration of hospital stays and prolonged patient suffering. We show that polyurethane containing crystal violet (CV) and 3-4 nm zinc oxide nanoparticles (ZnO NPs) possesses excellent bactericidal activity against hospital-acquired pathogens including multidrug resistant Escherichia coli (E. coli), Pseudomonas aeruginosa, methicillin-resistant Staphylococcus aureus (MRSA), and even highly resistant endospores of Clostridioides (Clostridium) difficile. Importantly, we used clinical isolates of bacterial strains, a protocol to mimic the environmental conditions of a real exposure in the healthcare setting, and low light intensity equivalent to that encountered in UK hospitals (∼500 lux). Our data shows that ZnO NPs enhance the photobactericidal activity of CV under low intensity light even with short exposure times, and we show that this involves both Type I and Type II photochemical pathways. Interestingly, polyurethane containing ZnO NPs alone showed significant bactericidal activity in the dark against one strain of E. coli, indicating that the NPs possess both light-activated synergistic activity with CV and inherent bactericidal activity that is independent of light. These new antibacterial polymers are potentially useful in healthcare facilties to reduce the transmission of pathogens between people and the environment.
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Affiliation(s)
- Sandeep K. Sehmi
- Division of Microbial Disease, UCL Eastman Dental Institute, University College London, 256 Gray’s Inn Road, London WC1X 8LD, United Kingdom
- Materials Chemistry Research Centre, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom
- UCL Division of Surgery and Interventional Science, University College London, Royal Free Campus, Rowland Hill Street, London NW3 2PF, United Kingdom
| | - Claudio Lourenco
- Division of Microbial Disease, UCL Eastman Dental Institute, University College London, 256 Gray’s Inn Road, London WC1X 8LD, United Kingdom
- Materials Chemistry Research Centre, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom
| | - Khaled Alkhuder
- Division of Microbial Disease, UCL Eastman Dental Institute, University College London, 256 Gray’s Inn Road, London WC1X 8LD, United Kingdom
| | - Sebastian D. Pike
- Department of Chemistry, Imperial College London, Imperial College Road, London SW7 2AZ, United Kingdom
| | - Sacha Noimark
- Department of Medical Physics and Biomedical Engineering, University College London, Gower Street, London WC1E 6BT, United Kingdom
| | - Charlotte K. Williams
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Milo S. P. Shaffer
- Department of Chemistry, Imperial College London, Imperial College Road, London SW7 2AZ, United Kingdom
| | - Ivan P. Parkin
- Materials Chemistry Research Centre, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom
| | - Alexander J. MacRobert
- UCL Division of Surgery and Interventional Science, University College London, Royal Free Campus, Rowland Hill Street, London NW3 2PF, United Kingdom
| | - Elaine Allan
- Division of Microbial Disease, UCL Eastman Dental Institute, University College London, 256 Gray’s Inn Road, London WC1X 8LD, United Kingdom
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Li J, Zhu Q, Su Y, Wang D, Xing Z, Fang L. High-efficiency bacteriostatic material modified by nano zinc oxide and polyelectrolyte diallyl dimethylammonium chloride based on red mud. Colloids Surf B Biointerfaces 2019; 177:260-266. [DOI: 10.1016/j.colsurfb.2019.02.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 01/09/2019] [Accepted: 02/03/2019] [Indexed: 11/26/2022]
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12
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Synthesis of ZnO nanoparticles-decorated spindle-shaped graphene oxide for application in synergistic antibacterial activity. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2018; 183:293-301. [DOI: 10.1016/j.jphotobiol.2018.04.048] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Revised: 04/27/2018] [Accepted: 04/30/2018] [Indexed: 11/21/2022]
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13
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Ozkan E, Allan E, Parkin IP. White-Light-Activated Antibacterial Surfaces Generated by Synergy between Zinc Oxide Nanoparticles and Crystal Violet. ACS OMEGA 2018; 3:3190-3199. [PMID: 30023864 PMCID: PMC6045480 DOI: 10.1021/acsomega.7b01473] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Accepted: 02/20/2018] [Indexed: 05/29/2023]
Abstract
The prevalence of hospital-acquired infections (HAIs) caused by multidrug-resistant bacteria is a growing public health concern worldwide. Herein, a facile, easily scalable technique is reported to fabricate white-light-activated bactericidal surfaces by incorporating zinc oxide (ZnO) nanoparticles and crystal violet (CV) dye into poly(dimethylsiloxane). The effect of ZnO concentration on photobactericidal activity of CV is investigated, and we show that there is synergy between ZnO and CV. These materials showed highly significant antibacterial activity when tested against Staphylococcus aureus and Escherichia coli under white light conditions. These surfaces have potential to be used in healthcare environments to decrease the impact of HAIs.
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Affiliation(s)
- Ekrem Ozkan
- Materials
Chemistry Research Centre, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom
| | - Elaine Allan
- Department
of Microbial Diseases, UCL Eastman Dental Institute, University College London, 256 Gray’s Inn Road, London WC1X 8LD, United Kingdom
| | - Ivan P. Parkin
- Materials
Chemistry Research Centre, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom
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Ong HR, Khan MMR, Ramli R, Yunus RM, Rahman MW, Hong CS, Ahmad MS. Formation of CuO Nanoparticle in Glycerol and Its Catalytic Activity for Alkyd Resin Synthesis. ACTA ACUST UNITED AC 2018. [DOI: 10.1016/j.matpr.2018.01.124] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Hassan IA, Sathasivam S, Nair SP, Carmalt CJ. Antimicrobial Properties of Copper-Doped ZnO Coatings under Darkness and White Light Illumination. ACS OMEGA 2017; 2:4556-4562. [PMID: 30023724 PMCID: PMC6044572 DOI: 10.1021/acsomega.7b00759] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Accepted: 07/27/2017] [Indexed: 05/14/2023]
Abstract
We report the first antimicrobial study of transparent and robust Cu-doped ZnO coatings that displayed potent antimicrobial activity that resulted in bacterial (Escherichia coli) reduction below detection limits within 6 h of illumination via a white light source that is found in hospital environments. The same bacterial reduction rate was observed even under darkness for 4.0 atom % Cu-doped ZnO films thus providing an efficient 24 h disinfection. All films were produced via a novel, inexpensive, and easily scalable route and were also thoroughly analyzed for their material properties.
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Affiliation(s)
- Iman A. Hassan
- Materials
Chemistry Centre, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K.
| | - Sanjayan Sathasivam
- Materials
Chemistry Centre, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K.
| | - Sean P. Nair
- Department
of Microbial Diseases, UCL Eastman Dental
Institute, 256 Gray’s
Inn Road, London WC1X 8LD, U.K.
| | - Claire J. Carmalt
- Materials
Chemistry Centre, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K.
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Kottmann A, Mejía E, Hémery T, Klein J, Kragl U. Recent Developments in the Preparation of Silicones with Antimicrobial Properties. Chem Asian J 2017; 12:1168-1179. [PMID: 28393471 DOI: 10.1002/asia.201700244] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Revised: 04/10/2017] [Indexed: 01/24/2023]
Abstract
This Focus Review describes state-of-the-art methods for the preparation of antimicrobial silicones. Given the diversity of antimicrobial activity and their mechanisms, the performance of these materials is highly dependent on the characteristics of the polymeric matrix. Therefore, different synthetic routes have been developed, such as 1) physical treatments, 2) chemical transformations, and 3) copolymerization. This classification is not exclusive, so some products belong to more than one class. Herein, we attempt to present a handy overview of the development of antimicrobial silicones, their most important application fields, the most relevant antimicrobial assays, and, as the title suggests, an overview of the most relevant preparation methods.
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Affiliation(s)
- Annika Kottmann
- Leibniz Institute for Catalysis, Albert-Einstein-Straße 29a, 18059, Rostock, Germany
| | - Esteban Mejía
- Leibniz Institute for Catalysis, Albert-Einstein-Straße 29a, 18059, Rostock, Germany
| | - Thérèse Hémery
- Henkel AG & Co. KGaA, Henkelstraße 67, 40589, Düsseldorf, Germany
| | - Johann Klein
- Henkel AG & Co. KGaA, Henkelstraße 67, 40589, Düsseldorf, Germany
| | - Udo Kragl
- Leibniz Institute for Catalysis, Albert-Einstein-Straße 29a, 18059, Rostock, Germany.,University of Rostock, Institute of Chemistry, Albert-Einstein-Str. 3a, 18059, Rostock, Germany
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18
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Álvarez-Paino M, Muñoz-Bonilla A, Fernández-García M. Antimicrobial Polymers in the Nano-World. NANOMATERIALS (BASEL, SWITZERLAND) 2017; 7:E48. [PMID: 28336882 PMCID: PMC5333033 DOI: 10.3390/nano7020048] [Citation(s) in RCA: 81] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/06/2016] [Revised: 01/11/2017] [Accepted: 01/24/2017] [Indexed: 02/08/2023]
Abstract
Infections are one of the main concerns of our era due to antibiotic-resistant infections and the increasing costs in the health-care sector. Within this context, antimicrobial polymers present a great alternative to combat these problems since their mechanisms of action differ from those of antibiotics. Therefore, the microorganisms' resistance to these polymeric materials is avoided. Antimicrobial polymers are not only applied in the health-care sector, they are also used in many other areas. This review presents different strategies that combine nanoscience and nanotechnology in the polymer world to combat contaminations from bacteria, fungi or algae. It focuses on the most relevant areas of application of these materials, viz. health, food, agriculture, and textiles.
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Affiliation(s)
- Marta Álvarez-Paino
- Centre for Biomolecular Sciences, School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK.
| | - Alexandra Muñoz-Bonilla
- Instituto de Ciencia y Tecnología de Polímeros (ICTP-CSIC); C/ Juan de la Cierva 3, Madrid 28006, Spain.
| | - Marta Fernández-García
- Instituto de Ciencia y Tecnología de Polímeros (ICTP-CSIC); C/ Juan de la Cierva 3, Madrid 28006, Spain.
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Sehmi S, Noimark S, Pike S, Bear JC, Peveler WJ, Williams CK, Shaffer MSP, Allan E, Parkin IP, MacRobert AJ. Enhancing the Antibacterial Activity of Light-Activated Surfaces Containing Crystal Violet and ZnO Nanoparticles: Investigation of Nanoparticle Size, Capping Ligand, and Dopants. ACS OMEGA 2016; 1:334-343. [PMID: 27840856 PMCID: PMC5098237 DOI: 10.1021/acsomega.6b00017] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Accepted: 08/23/2016] [Indexed: 05/19/2023]
Abstract
Healthcare-associated infections pose a serious risk for patients, staff, and visitors and are a severe burden on the National Health Service, costing at least £1 billion annually. Antimicrobial surfaces significantly contribute toward reducing the incidence of infections as they prevent bacterial adhesion and cause bacterial cell death. Using a simple, easily upscalable swell-encapsulation-shrink method, novel antimicrobial surfaces have been developed by incorporating metal oxide nanoparticles (NPs) and crystal violet (CV) dye into medical-grade polyurethane sheets. This study compares the bactericidal effects of polyurethane incorporating ZnO, Mg-doped ZnO, and MgO. All metal oxide NPs are well defined, with average diameters ranging from 2 to 18 nm. These materials demonstrate potent bactericidal activity when tested against clinically relevant bacteria such as Escherichia coli and Staphylococcus aureus. Additionally, these composites are tested against an epidemic strain of methicillin-resistant Staphylococcus aureus (MRSA) that is rife in hospitals throughout the UK. Furthermore, we have tested these materials using a low light intensity (∼500 lx), similar to that present in many clinical environments. The highest activity is achieved from polymer composites incorporating CV and ∼3 nm ZnO NPs, and the different performances of the metal oxides have been discussed.
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Affiliation(s)
- Sandeep
K. Sehmi
- UCL
Division of Surgery and Interventional Science, University College London, Royal Free Campus, Rowland Hill Street, London NW3 2PF, U.K.
- Materials
Chemistry Research Centre, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K.
- Division
of Microbial Disease, UCL Eastman Dental Institute, University College London, 256 Gray’s Inn Road, London WC1X 8LD, U.K.
| | - Sacha Noimark
- Department
of Medical Physics and Biomedical Engineering, University College London, Gower Street, London WC1E
6BT, U.K.
| | - Sebastian
D. Pike
- Department
of Chemistry, Imperial College London, Imperial College Road, London SW7 2AZ, U.K.
| | - Joseph C. Bear
- Materials
Chemistry Research Centre, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K.
| | - William J. Peveler
- Materials
Chemistry Research Centre, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K.
| | - Charlotte K. Williams
- Department
of Chemistry, Imperial College London, Imperial College Road, London SW7 2AZ, U.K.
| | - Milo S. P. Shaffer
- Department
of Chemistry, Imperial College London, Imperial College Road, London SW7 2AZ, U.K.
| | - Elaine Allan
- Division
of Microbial Disease, UCL Eastman Dental Institute, University College London, 256 Gray’s Inn Road, London WC1X 8LD, U.K.
| | - Ivan P. Parkin
- Materials
Chemistry Research Centre, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K.
| | - Alexander J. MacRobert
- UCL
Division of Surgery and Interventional Science, University College London, Royal Free Campus, Rowland Hill Street, London NW3 2PF, U.K.
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20
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Yang CT, Lee WW, Lin HP, Dai YM, Chi HT, Chen CC. A novel heterojunction photocatalyst, Bi2SiO5/g-C3N4: synthesis, characterization, photocatalytic activity, and mechanism. RSC Adv 2016. [DOI: 10.1039/c6ra02299e] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
A new type of heterojunction photocatalyst, Bi2SiO5/g-C3N4, was prepared using a controlled hydrothermal method.
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Affiliation(s)
| | - Wenlian William Lee
- Department of Occupational Safety and Health
- Chung-Shan Medical University
- Taiwan
| | - Ho-Pan Lin
- National Taichung University of Education
- Taiwan
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21
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Ma YY, Ding H, Xiong HM. Folic acid functionalized ZnO quantum dots for targeted cancer cell imaging. NANOTECHNOLOGY 2015; 26:305702. [PMID: 26148516 DOI: 10.1088/0957-4484/26/30/305702] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Aqueous stable luminescent ZnO quantum dots (QDs) were successfully synthesized with primary amine groups on the surface, which were designed to conjugate with folic acid (FA) to produce the final ZnO-FA QDs. Such ZnO-FA QDs were able to target some specific cancer cells with overexpressed FA receptors on the membranes and thus differentiate the MCF-7 cancer cells from the normal 293T cells. The nanoparticle uptaking experiments by different cells were carried out in parallel and tracked by confocal laser microscopy dynamically. The results confirmed the specificity of our ZnO-FA QDs towards the FA-receptor overexpressed cancer cells, which had potential for diagnosing cancers in vitro.
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Affiliation(s)
- Ying-Ying Ma
- Department of Chemistry, Fudan University, Shanghai 200433, People's Republic of China
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22
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Ong HR, Khan MMR, Ramli R, Rahman MW, Yunus RM. Tailoring base catalyzed synthesis of palm oil based alkyd resin through CuO nanoparticles. RSC Adv 2015. [DOI: 10.1039/c5ra19575f] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Palm oil based alkyd resin was synthesized by an alcoholysis–polyesterification process over a base catalyst tailored by copper oxide (CuO) nanoparticles.
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Affiliation(s)
- Huei Ruey Ong
- Faculty of Chemical & Natural Resources Engineering
- Universiti Malaysia Pahang
- Malaysia
- Malaysian Palm Oil Board (MPOB)
- 43000 Kajang
| | | | | | - Md. Wasikur Rahman
- Faculty of Chemical & Natural Resources Engineering
- Universiti Malaysia Pahang
- Malaysia
| | - Rosli Mohd Yunus
- Faculty of Chemical & Natural Resources Engineering
- Universiti Malaysia Pahang
- Malaysia
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23
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Ong HR, Rahman Khan MM, Ramli R, Yunus RM. Effect of CuO Nanoparticle on Mechanical and Thermal Properties of Palm Oil Based Alkyd/Epoxy Resin Blend. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.proche.2015.12.101] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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