1
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Fernandez M, Thompson J, Calle A. Novel feed additive delivers antimicrobial copper and influences fecal microbiota in pigs. Microbiol Spectr 2024; 12:e0428023. [PMID: 38629838 DOI: 10.1128/spectrum.04280-23] [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: 12/22/2023] [Accepted: 03/18/2024] [Indexed: 06/06/2024] Open
Abstract
Dehydrated alginate beads formulated with copper were synthesized and tested as a feed additive to influence the microbiota in finishing pigs and potentially use them as a preharvest intervention to reduce fecal pathogen shedding. The efficacy of the copper beads was tested in vitro and in vivo. In vitro, Salmonella was significantly (P < 0.05) reduced when in contact with the copper beads solution for up to 6 h, with a 5.4 log CFU/mL reduction over the first hour. Chemical analysis of the soak solutions demonstrated the beads delivered their copper payload gradually over the same period the bactericidal effect was observed. For the in vivo experiments, pigs (n = 48) supplemented with the copper beads experienced significant shifts in their microbiota. Enterobacteriaceae (EB) increased by 1.07 log CFU/g (P < 0.05), while lactic acid bacteria (LAB) decreased by 1.22 log CFU/g (P < 0.05) during the treatment period. When beads were removed from the feed, EB and LAB concentrations returned to baseline, indicating copper beads led to measurable and significant changes in microbial loads. Fecal microbiome analysis conducted to explore additional changes by copper bead supplementation demonstrated that, at the phylum level, there was an increase in Firmicutes, Euryarchaeota, and Acidobacteriota, while at the genus level, an increase in Methanosphaera and Pseudomonas was observed. Measures of copper in swine feces showed values ~20 times higher in the treatment group than in the control group during the treatment period, suggesting that dehydrated alginate copper beads were effective in delivering antimicrobial copper to the animal hindgut.IMPORTANCECopper has long been known to have antimicrobial properties. However, when water-soluble salts are fed to livestock, the copper may rapidly dissolve in gastric contents and fail to reach the gut. Here, specially formulated copper beads are seamlessly incorporated into feed and allow copper to remain longer in the gastrointestinal tract of animals, reach deep into both the foregut and hindgut, and shift microbial populations. The technology delivers antimicrobial copper to the animal hindgut and potentially reduces pathogenic microorganisms before animal slaughter.
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Affiliation(s)
- Mariana Fernandez
- Texas Tech University, School of Veterinary Medicine, Amarillo, Texas, USA
| | - Jonathan Thompson
- Texas Tech University, School of Veterinary Medicine, Amarillo, Texas, USA
| | - Alexandra Calle
- Texas Tech University, School of Veterinary Medicine, Amarillo, Texas, USA
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2
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Gu G, Murphy CM, Hamilton AM, Zheng J, Nou X, Rideout SL, Strawn LK. Effect of pesticide application on
Salmonella
survival on inoculated tomato leaves. J Food Saf 2023. [DOI: 10.1111/jfs.13043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Ganyu Gu
- School of Plant and Environmental Sciences Virginia Tech Blacksburg Virginia USA
- Environmental Microbial and Food Safety Laboratory United States Department of Agriculture‐Agricultural Research Service Beltsville Maryland USA
| | - Claire M. Murphy
- Department of Food Science and Technology Virginia Tech Blacksburg Virginia USA
| | - Alexis M. Hamilton
- Department of Food Science and Technology Virginia Tech Blacksburg Virginia USA
| | - Jie Zheng
- Center for Food Safety and Applied Nutrition US Food and Drug Administration College Park Maryland USA
| | - Xiangwu Nou
- Environmental Microbial and Food Safety Laboratory United States Department of Agriculture‐Agricultural Research Service Beltsville Maryland USA
| | - Steven L. Rideout
- School of Plant and Environmental Sciences Virginia Tech Blacksburg Virginia USA
| | - Laura K. Strawn
- Department of Food Science and Technology Virginia Tech Blacksburg Virginia USA
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3
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Jiang Y, Zhang WJ, Mi XJ, Huang GJ, Xie HF, Feng X, Peng LJ, Yang Z. Antibacterial property, corrosion and discoloration resistance of pure copper containing Zn or Ni. RARE METALS 2022; 41:4041-4046. [PMID: 36157376 PMCID: PMC9483388 DOI: 10.1007/s12598-022-02098-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 04/20/2022] [Accepted: 05/08/2022] [Indexed: 06/16/2023]
Abstract
UNLABELLED This study focused on the effects of Zn and Ni addition on the antibacterial properties and corrosion resistance of copper alloys. The antimicrobial properties of copper and copper alloys were evaluated using Escherichia coli ATCC 8739 bacterial strain by employing the overlay and plate counting methods. X-ray photoelectron spectroscopy (XPS) was used to analyze the surface composition of the alloy after contact with bacteria. A salt spray method was used to simulate an artificial sweat contact environment to test the discoloration and corrosion resistance of the alloy, and scanning electron microscopy (SEM) was used to analyze the film layer and surface material composition of the corroded samples. The addition of Ni reduced the antibacterial performance of pure copper; however, the antibacterial performance of the alloy remained fast and efficient after the addition of Zn. Moreover, the addition of Zn and Ni significantly improved the corrosion resistance and surface discoloration of copper alloys in artificial sweat environments. This study provided support for the future application of copper alloys as antimicrobial surface-contact materials with safer public and medical environments in the face of diseases spread by large populations. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s12598-022-02098-8.
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Affiliation(s)
- Yun Jiang
- State Key Laboratory of Nonferrous Metals and Processes, GRINM Group Co., Ltd, Beijing, 100088 China
- GRIMAT Engineering Institute Co., Ltd, Beijing, 101407 China
- General Research Institute for Nonferrous Metals, Beijing, 100088 China
| | - Wen-Jing Zhang
- State Key Laboratory of Nonferrous Metals and Processes, GRINM Group Co., Ltd, Beijing, 100088 China
- GRIMAT Engineering Institute Co., Ltd, Beijing, 101407 China
- General Research Institute for Nonferrous Metals, Beijing, 100088 China
| | - Xu-Jun Mi
- State Key Laboratory of Nonferrous Metals and Processes, GRINM Group Co., Ltd, Beijing, 100088 China
- GRIMAT Engineering Institute Co., Ltd, Beijing, 101407 China
- General Research Institute for Nonferrous Metals, Beijing, 100088 China
| | - Guo-Jie Huang
- State Key Laboratory of Nonferrous Metals and Processes, GRINM Group Co., Ltd, Beijing, 100088 China
- GRIMAT Engineering Institute Co., Ltd, Beijing, 101407 China
- General Research Institute for Nonferrous Metals, Beijing, 100088 China
| | - Hao-Feng Xie
- State Key Laboratory of Nonferrous Metals and Processes, GRINM Group Co., Ltd, Beijing, 100088 China
- GRIMAT Engineering Institute Co., Ltd, Beijing, 101407 China
- General Research Institute for Nonferrous Metals, Beijing, 100088 China
| | - Xue Feng
- State Key Laboratory of Nonferrous Metals and Processes, GRINM Group Co., Ltd, Beijing, 100088 China
- GRIMAT Engineering Institute Co., Ltd, Beijing, 101407 China
- General Research Institute for Nonferrous Metals, Beijing, 100088 China
| | - Li-Jun Peng
- State Key Laboratory of Nonferrous Metals and Processes, GRINM Group Co., Ltd, Beijing, 100088 China
- GRIMAT Engineering Institute Co., Ltd, Beijing, 101407 China
- General Research Institute for Nonferrous Metals, Beijing, 100088 China
| | - Zhen Yang
- State Key Laboratory of Nonferrous Metals and Processes, GRINM Group Co., Ltd, Beijing, 100088 China
- GRIMAT Engineering Institute Co., Ltd, Beijing, 101407 China
- General Research Institute for Nonferrous Metals, Beijing, 100088 China
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4
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Recent Advances in Metal-Based Antimicrobial Coatings for High-Touch Surfaces. Int J Mol Sci 2022; 23:ijms23031162. [PMID: 35163084 PMCID: PMC8835042 DOI: 10.3390/ijms23031162] [Citation(s) in RCA: 34] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 01/14/2022] [Accepted: 01/19/2022] [Indexed: 02/06/2023] Open
Abstract
International interest in metal-based antimicrobial coatings to control the spread of bacteria, fungi, and viruses via high contact human touch surfaces are growing at an exponential rate. This interest recently reached an all-time high with the outbreak of the deadly COVID-19 disease, which has already claimed the lives of more than 5 million people worldwide. This global pandemic has highlighted the major role that antimicrobial coatings can play in controlling the spread of deadly viruses such as SARS-CoV-2 and scientists and engineers are now working harder than ever to develop the next generation of antimicrobial materials. This article begins with a review of three discrete microorganism-killing phenomena of contact-killing surfaces, nanoprotrusions, and superhydrophobic surfaces. The antimicrobial properties of metals such as copper (Cu), silver (Ag), and zinc (Zn) are reviewed along with the effects of combining them with titanium dioxide (TiO2) to create a binary or ternary contact-killing surface coatings. The self-cleaning and bacterial resistance of purely structural superhydrophobic surfaces and the potential of physical surface nanoprotrusions to damage microbial cells are then considered. The article then gives a detailed discussion on recent advances in attempting to combine these individual phenomena to create super-antimicrobial metal-based coatings with binary or ternary killing potential against a broad range of microorganisms, including SARS-CoV-2, for high-touch surface applications such as hand rails, door plates, and water fittings on public transport and in healthcare, care home and leisure settings as well as personal protective equipment commonly used in hospitals and in the current COVID-19 pandemic.
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5
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Bäumler W, Eckl D, Holzmann T, Schneider-Brachert W. Antimicrobial coatings for environmental surfaces in hospitals: a potential new pillar for prevention strategies in hygiene. Crit Rev Microbiol 2021; 48:531-564. [PMID: 34699296 DOI: 10.1080/1040841x.2021.1991271] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Recent reports provide evidence that contaminated healthcare environments represent major sources for the acquisition and transmission of pathogens. Antimicrobial coatings (AMC) may permanently and autonomously reduce the contamination of such environmental surfaces complementing standard hygiene procedures. This review provides an overview of the current status of AMC and the demands to enable a rational application of AMC in health care settings. Firstly, a suitable laboratory test norm is required that adequately quantifies the efficacy of AMC. In particular, the frequently used wet testing (e.g. ISO 22196) must be replaced by testing under realistic, dry surface conditions. Secondly, field studies should be mandatory to provide evidence for antimicrobial efficacy under real-life conditions. The antimicrobial efficacy should be correlated to the rate of nosocomial transmission at least. Thirdly, the respective AMC technology should not add additional bacterial resistance development induced by the biocidal agents and co- or cross-resistance with antibiotic substances. Lastly, the biocidal substances used in AMC should be safe for humans and the environment. These measures should help to achieve a broader acceptance for AMC in healthcare settings and beyond. Technologies like the photodynamic approach already fulfil most of these AMC requirements.
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Affiliation(s)
- Wolfgang Bäumler
- Department of Dermatology, University Hospital, Regensburg, Germany
| | - Daniel Eckl
- Department of Microbiology, University of Regensburg, Regensburg, Germany
| | - Thomas Holzmann
- Department of Infection Control and Infectious Diseases, University Hospital, Regensburg, Germany
| | - Wulf Schneider-Brachert
- Department of Infection Control and Infectious Diseases, University Hospital, Regensburg, Germany
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6
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Abraham J, Dowling K, Florentine S. Can Copper Products and Surfaces Reduce the Spread of Infectious Microorganisms and Hospital-Acquired Infections? MATERIALS (BASEL, SWITZERLAND) 2021; 14:3444. [PMID: 34206230 PMCID: PMC8269470 DOI: 10.3390/ma14133444] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 06/17/2021] [Accepted: 06/19/2021] [Indexed: 01/04/2023]
Abstract
Pathogen transfer and infection in the built environment are globally significant events, leading to the spread of disease and an increase in subsequent morbidity and mortality rates. There are numerous strategies followed in healthcare facilities to minimize pathogen transfer, but complete infection control has not, as yet, been achieved. However, based on traditional use in many cultures, the introduction of copper products and surfaces to significantly and positively retard pathogen transmission invites further investigation. For example, many microbes are rendered unviable upon contact exposure to copper or copper alloys, either immediately or within a short time. In addition, many disease-causing bacteria such as E. coli O157:H7, hospital superbugs, and several viruses (including SARS-CoV-2) are also susceptible to exposure to copper surfaces. It is thus suggested that replacing common touch surfaces in healthcare facilities, food industries, and public places (including public transport) with copper or alloys of copper may substantially contribute to limiting transmission. Subsequent hospital admissions and mortality rates will consequently be lowered, with a concomitant saving of lives and considerable levels of resources. This consideration is very significant in times of the COVID-19 pandemic and the upcoming epidemics, as it is becoming clear that all forms of possible infection control measures should be practiced in order to protect community well-being and promote healthy outcomes.
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Affiliation(s)
- Joji Abraham
- School of Engineering, Information Technology and Physical Sciences, Mt Helen Campus, Ballarat, VIC 3353, Australia;
| | - Kim Dowling
- School of Engineering, Information Technology and Physical Sciences, Mt Helen Campus, Ballarat, VIC 3353, Australia;
- Department of Geology, University of Johannesburg, Johannesburg 2006, South Africa
| | - Singarayer Florentine
- Future Regions Research Centre, School of Science, Psychology and Sport, Federation University Australia, Mt Helen Campus, Ballarat, VIC 3353, Australia;
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7
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Chatzipanagiotou KR, Soekhoe V, Jourdin L, Buisman CJN, Bitter JH, Strik DPBTB. Catalytic Cooperation between a Copper Oxide Electrocatalyst and a Microbial Community for Microbial Electrosynthesis. Chempluschem 2021; 86:763-777. [PMID: 33973736 DOI: 10.1002/cplu.202100119] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2021] [Revised: 04/26/2021] [Indexed: 11/06/2022]
Abstract
Electrocatalytic metals and microorganisms can be combined for CO2 conversion in microbial electrosynthesis (MES). However, a systematic investigation on the nature of interactions between metals and MES is still lacking. To investigate this nature, we integrated a copper electrocatalyst, converting CO2 to formate, with microorganisms, converting CO2 to acetate. A co-catalytic (i. e. metabolic) relationship was evident, as up to 140 mg L-1 of formate was produced solely by copper oxide, while formate was also evidently produced by copper and consumed by microorganisms producing acetate. Due to non-metabolic interactions, current density decreased by over 4 times, though acetate yield increased by 3.3 times. Despite the antimicrobial role of copper, biofilm formation was possible on a pure copper surface. Overall, we show for the first time that a CO2 -reducing copper electrocatalyst can be combined with MES under biological conditions, resulting in metabolic and non-metabolic interactions.
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Affiliation(s)
- Konstantina-Roxani Chatzipanagiotou
- Biobased Chemistry and Technology, Wageningen University & Research, Bornse Weilanden 9, 6708 WG, Wageningen, The Netherlands.,Environmental Technology, Wageningen University & Research, Bornse Weilanden 9, 6708 WG, Wageningen, The Netherlands
| | - Virangni Soekhoe
- Biobased Chemistry and Technology, Wageningen University & Research, Bornse Weilanden 9, 6708 WG, Wageningen, The Netherlands.,Environmental Technology, Wageningen University & Research, Bornse Weilanden 9, 6708 WG, Wageningen, The Netherlands
| | - Ludovic Jourdin
- Environmental Technology, Wageningen University & Research, Bornse Weilanden 9, 6708 WG, Wageningen, The Netherlands.,Currently at Department of Biotechnology, Delft University of Technology, van der Maasweg 9, 2629 HZ, Delft, The Netherlands
| | - Cees J N Buisman
- Environmental Technology, Wageningen University & Research, Bornse Weilanden 9, 6708 WG, Wageningen, The Netherlands
| | - J Harry Bitter
- Biobased Chemistry and Technology, Wageningen University & Research, Bornse Weilanden 9, 6708 WG, Wageningen, The Netherlands
| | - David P B T B Strik
- Environmental Technology, Wageningen University & Research, Bornse Weilanden 9, 6708 WG, Wageningen, The Netherlands
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8
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Xiong S, Zhang P, Xia Y, Zou Q, Jiang M, Gai J. Unique antimicrobial/thermally conductive polymer composites for use in medical electronic devices. J Appl Polym Sci 2021. [DOI: 10.1002/app.50113] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Si‐Wei Xiong
- State Key Laboratory of Polymer Materials Engineering Polymer Research Institute of Sichuan University Chengdu Sichuan China
| | - Pan Zhang
- State Key Laboratory of Polymer Materials Engineering Polymer Research Institute of Sichuan University Chengdu Sichuan China
| | - Yu Xia
- State Key Laboratory of Polymer Materials Engineering Polymer Research Institute of Sichuan University Chengdu Sichuan China
| | - Qian Zou
- State Key Laboratory of Polymer Materials Engineering Polymer Research Institute of Sichuan University Chengdu Sichuan China
| | - Meng‐ying Jiang
- State Key Laboratory of Polymer Materials Engineering Polymer Research Institute of Sichuan University Chengdu Sichuan China
| | - Jing‐Gang Gai
- State Key Laboratory of Polymer Materials Engineering Polymer Research Institute of Sichuan University Chengdu Sichuan China
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9
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Rajan ST, Das M, Kumar PS, Arockiarajan A, Subramanian B. Biological performance of metal metalloid (TiCuZrPd:B) TFMG fabricated by pulsed laser deposition. Colloids Surf B Biointerfaces 2021; 202:111684. [PMID: 33721806 DOI: 10.1016/j.colsurfb.2021.111684] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 02/23/2021] [Accepted: 03/04/2021] [Indexed: 10/22/2022]
Abstract
The aim of our study is to investigate the effect of boron with different ratios in Ti-Cu-Pd-Zr metallic glass (MG) matrix (Ti-Cu-Pd-Zr:B) fabricated by Pulsed Laser Deposition (PLD) for biomedical implants. The Ti based Thin Film Metallic Glasses (TFMGs) in combination with boron (in different atomic %) was assessed in attaining the combined properties, like outstanding corrosion resistant properties and good biocompatibility in this work. The disordered structure and amorphous nature of the Ti-Cu-Pd-Zr:B thin films systems were achieved by the PLD process and affirmed by XRD and transmission electron microscopy. The boron incorporation in the TFMG has been elucidated by XPS analysis. The boron containing films displays distribution of boron protuberances interleaved in the amorphous matrix was stated from SEM analysis. It is found that increase in atomic percentage of boron contents in TFMG results in the improvement in glass transition temperatures. The electrochemical parameters suggest better corrosion resistance and capabilities of passivity when boron percentage was increased in the film thereby preventing adverse biological reactions. TFMGs exhibited excellent hemocompatibility by preventing the platelet activation. MTT assay manifests increase in cell concentration with culture period on the TFMGs for the MC3T3-E1 preosteoblasts cells. Cell morphology was also studied which confirmed the viable state of the cells on the TFMG surfaces. The combination of such distinctive properties marks these TFMG systems as prospective aspirants for biomedical implants.
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Affiliation(s)
- S Thanka Rajan
- CSIR-Central Electrochemical Research Institute (CSIR-CECRI), Karaikudi, 630 006, India; Department of Applied Mechanics, Indian Institute of Technology Madras, Chennai, 600 036, India
| | - Mitun Das
- Bioceramics and Coating Division, CSIR-Central Glass & Ceramic Research Institute, Kolkata, 700032, India
| | - P Sasi Kumar
- CSIR-Central Electrochemical Research Institute (CSIR-CECRI), Karaikudi, 630 006, India
| | - A Arockiarajan
- Department of Applied Mechanics, Indian Institute of Technology Madras, Chennai, 600 036, India
| | - B Subramanian
- CSIR-Central Electrochemical Research Institute (CSIR-CECRI), Karaikudi, 630 006, India.
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10
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Dauvergne E, Mullié C. Brass Alloys: Copper-Bottomed Solutions against Hospital-Acquired Infections? Antibiotics (Basel) 2021; 10:antibiotics10030286. [PMID: 33801855 PMCID: PMC7999369 DOI: 10.3390/antibiotics10030286] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 02/26/2021] [Accepted: 03/08/2021] [Indexed: 12/26/2022] Open
Abstract
Copper has been used for its antimicrobial properties since Antiquity. Nowadays, touch surfaces made of copper-based alloys such as brasses are used in healthcare settings in an attempt to reduce the bioburden and limit environmental transmission of nosocomial pathogens. After a brief history of brass uses, the various mechanisms that are thought to be at the basis of brass antimicrobial action will be described. Evidence shows that direct contact with the surface as well as cupric and cuprous ions arising from brass surfaces are instrumental in the antimicrobial effectiveness. These copper ions can lead to oxidative stress, membrane alterations, protein malfunctions, and/or DNA damages. Laboratory studies back up a broad spectrum of activity of brass surfaces on bacteria with the possible exception of bacteria in their sporulated form. Various parameters influencing the antimicrobial activity such as relative humidity, temperature, wet/dry inoculation or wear have been identified, making it mandatory to standardize antibacterial testing. Field trials using brass and copper surfaces consistently report reductions in the bacterial bioburden but, evidence is still sparse as to a significant impact on hospital acquired infections. Further work is also needed to assess the long-term effects of chemical/physical wear on their antimicrobial effectiveness.
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Affiliation(s)
- Emilie Dauvergne
- Laboratoire AGIR-UR UPJV 4294, UFR de Pharmacie, Université de Picardie Jules Verne, 80037 Amiens, France;
- FAVI Limited Company, 80490 Hallencourt, France
| | - Catherine Mullié
- Laboratoire AGIR-UR UPJV 4294, UFR de Pharmacie, Université de Picardie Jules Verne, 80037 Amiens, France;
- Laboratoire Hygiène, Risque Biologique et Environnement, Centre Hospitalier Universitaire Amiens-Picardie, 80025 Amiens, France
- Correspondence:
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11
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Chang T, Sepati M, Herting G, Leygraf C, Rajarao GK, Butina K, Richter-Dahlfors A, Blomberg E, Odnevall Wallinder I. A novel methodology to study antimicrobial properties of high-touch surfaces used for indoor hygiene applications-A study on Cu metal. PLoS One 2021; 16:e0247081. [PMID: 33630868 PMCID: PMC7906481 DOI: 10.1371/journal.pone.0247081] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Accepted: 02/01/2021] [Indexed: 01/30/2023] Open
Abstract
Metal-based high-touch surfaces used for indoor applications such as doorknobs, light switches, handles and desks need to remain their antimicrobial properties even when tarnished or degraded. A novel laboratory methodology of relevance for indoor atmospheric conditions and fingerprint contact has therefore been elaborated for combined studies of both tarnishing/corrosion and antimicrobial properties of such high-touch surfaces. Cu metal was used as a benchmark material. The protocol includes pre-tarnishing/corrosion of the high touch surface for different time periods in a climatic chamber at repeated dry/wet conditions and artificial sweat deposition followed by the introduction of bacteria onto the surfaces via artificial sweat droplets. This methodology provides a more realistic and reproducible approach compared with other reported procedures to determine the antimicrobial efficiency of high-touch surfaces. It provides further a possibility to link the antimicrobial characteristics to physical and chemical properties such as surface composition, chemical reactivity, tarnishing/corrosion, surface roughness and surface wettability. The results elucidate that bacteria interactions as well as differences in extent of tarnishing can alter the physical properties (e.g. surface wettability, surface roughness) as well as the extent of metal release. The results clearly elucidate the importance to consider changes in chemical and physical properties of indoor hygiene surfaces when assessing their antimicrobial properties.
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Affiliation(s)
- T. Chang
- Department of Chemistry, KTH Royal Institute of Technology, Div. Surface and Corrosion Science, School of Engineering Sciences in Chemistry, Biotechnology and Health, Stockholm, Sweden
- AIMES—Center for the Advancement of Integrated Medical and Engineering Sciences at Karolinska Institutet and KTH Royal Institute of Technology, Stockholm, Sweden
- Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - M. Sepati
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Milan, Italy
| | - G. Herting
- Department of Chemistry, KTH Royal Institute of Technology, Div. Surface and Corrosion Science, School of Engineering Sciences in Chemistry, Biotechnology and Health, Stockholm, Sweden
| | - C. Leygraf
- Department of Chemistry, KTH Royal Institute of Technology, Div. Surface and Corrosion Science, School of Engineering Sciences in Chemistry, Biotechnology and Health, Stockholm, Sweden
| | - G. Kuttuva Rajarao
- Department of Industrial Biotechnology, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Stockholm, Sweden
| | - K. Butina
- AIMES—Center for the Advancement of Integrated Medical and Engineering Sciences at Karolinska Institutet and KTH Royal Institute of Technology, Stockholm, Sweden
- Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - A. Richter-Dahlfors
- AIMES—Center for the Advancement of Integrated Medical and Engineering Sciences at Karolinska Institutet and KTH Royal Institute of Technology, Stockholm, Sweden
- Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden
- KTH Royal Institute of Technology, School of Engineering Sciences in Chemistry, Biotechnology and Health, Fibre and Polymer Technology, Stockholm, Sweden
| | - E. Blomberg
- Department of Chemistry, KTH Royal Institute of Technology, Div. Surface and Corrosion Science, School of Engineering Sciences in Chemistry, Biotechnology and Health, Stockholm, Sweden
| | - I. Odnevall Wallinder
- Department of Chemistry, KTH Royal Institute of Technology, Div. Surface and Corrosion Science, School of Engineering Sciences in Chemistry, Biotechnology and Health, Stockholm, Sweden
- AIMES—Center for the Advancement of Integrated Medical and Engineering Sciences at Karolinska Institutet and KTH Royal Institute of Technology, Stockholm, Sweden
- Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden
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12
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Zhang E, Zhao X, Hu J, Wang R, Fu S, Qin G. Antibacterial metals and alloys for potential biomedical implants. Bioact Mater 2021; 6:2569-2612. [PMID: 33615045 PMCID: PMC7876544 DOI: 10.1016/j.bioactmat.2021.01.030] [Citation(s) in RCA: 142] [Impact Index Per Article: 47.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 01/11/2021] [Accepted: 01/27/2021] [Indexed: 02/07/2023] Open
Abstract
Metals and alloys, including stainless steel, titanium and its alloys, cobalt alloys, and other metals and alloys have been widely used clinically as implant materials, but implant-related infection or inflammation is still one of the main causes of implantation failure. The bacterial infection or inflammation that seriously threatens human health has already become a worldwide complaint. Antibacterial metals and alloys recently have attracted wide attention for their long-term stable antibacterial ability, good mechanical properties and good biocompatibility in vitro and in vivo. In this review, common antibacterial alloying elements, antibacterial standards and testing methods were introduced. Recent developments in the design and manufacturing of antibacterial metal alloys containing various antibacterial agents were described in detail, including antibacterial stainless steel, antibacterial titanium alloy, antibacterial zinc and alloy, antibacterial magnesium and alloy, antibacterial cobalt alloy, and other antibacterial metals and alloys. Researches on the antibacterial properties, mechanical properties, corrosion resistance and biocompatibility of antibacterial metals and alloys have been summarized in detail for the first time. It is hoped that this review could help researchers understand the development of antibacterial alloys in a timely manner, thereby could promote the development of antibacterial metal alloys and the clinical application. This paper focuses the recent development of several antibacterial metals and alloys as biomedical materials. The possible antibacterial mechanisms of antibacterial metals and alloys are summarized in this paper. This review discusses the feasibility of antibacterial metals and alloys as biomedical implants in the future.
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Affiliation(s)
- Erlin Zhang
- Key Lab. for Anisotropy and Texture of Materials, Education Ministry of China, School of Materials Science and Engineering, Northeastern University, Shenyang, 150819, China.,Research Center for Metallic Wires, Northeastern University, Shenyang, 110819, China
| | - Xiaotong Zhao
- Key Lab. for Anisotropy and Texture of Materials, Education Ministry of China, School of Materials Science and Engineering, Northeastern University, Shenyang, 150819, China
| | - Jiali Hu
- Key Lab. for Anisotropy and Texture of Materials, Education Ministry of China, School of Materials Science and Engineering, Northeastern University, Shenyang, 150819, China
| | - Ruoxian Wang
- Key Lab. for Anisotropy and Texture of Materials, Education Ministry of China, School of Materials Science and Engineering, Northeastern University, Shenyang, 150819, China
| | - Shan Fu
- Key Lab. for Anisotropy and Texture of Materials, Education Ministry of China, School of Materials Science and Engineering, Northeastern University, Shenyang, 150819, China
| | - Gaowu Qin
- Key Lab. for Anisotropy and Texture of Materials, Education Ministry of China, School of Materials Science and Engineering, Northeastern University, Shenyang, 150819, China.,Research Center for Metallic Wires, Northeastern University, Shenyang, 110819, China
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13
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Pontin KP, Borges KA, Furian TQ, Carvalho D, Wilsmann DE, Cardoso HRP, Alves AK, Chitolina GZ, Salle CTP, Moraes HLDS, do Nascimento VP. Antimicrobial activity of copper surfaces against biofilm formation by Salmonella Enteritidis and its potential application in the poultry industry. Food Microbiol 2020; 94:103645. [PMID: 33279070 DOI: 10.1016/j.fm.2020.103645] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 09/04/2020] [Accepted: 09/15/2020] [Indexed: 10/23/2022]
Abstract
As a consequence of developing antimicrobial resistance to disinfectants, copper, which exhibits antimicrobial activity, has been studied as a possible alternative to the use of stainless steel surfaces. The aim was to evaluate the antimicrobial activity of copper surfaces in preventing biofilm formation by Salmonella Enteritidis and to determine their corrosive capacity. Strains of S. Enteritidis were incubated at 4 °C, 12 °C, and 25 °C with 1 cm2 coupons of electrolytic copper (99.9% Cu), brass (70% Cu), copper coated with tin, and stainless steel (control). A planktonic cell-suspension assay was used, followed by serial dilutions and bacterial counts. The corrosion test was performed with two disinfectants: benzalkonium chloride and sodium hypochlorite (100, 200, and 400 ppm). There was a significant reduction in biofilm production (log10 CFU cm-2) on the copper (2.64 at 4 °C, 4.20 at 12 °C, 4.56 at 25 °C) and brass (2.79 at 4 °C, 3.49 at 12 °C, 4.55 at 25 °C) surfaces compared to the control (5.68 at 4 °C, 5.89 at 12 °C, 6.01 at 25 °C). The antimicrobial surfaces showed uniform corrosion similar to that of surfaces generally used. These results demonstrated the effectiveness of copper surfaces in reducing S. Enteritidis and suggest they can be used as a complementary antimicrobial to control for this pathogen.
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Affiliation(s)
- Karine Patrin Pontin
- Centro de Diagnóstico e Pesquisa em Patologia Aviária, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves 8824, 91540-00, Porto Alegre, RS, Brazil.
| | - Karen Apellanis Borges
- Centro de Diagnóstico e Pesquisa em Patologia Aviária, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves 8824, 91540-00, Porto Alegre, RS, Brazil.
| | - Thales Quedi Furian
- Centro de Diagnóstico e Pesquisa em Patologia Aviária, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves 8824, 91540-00, Porto Alegre, RS, Brazil.
| | - Daiane Carvalho
- Centro de Diagnóstico e Pesquisa em Patologia Aviária, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves 8824, 91540-00, Porto Alegre, RS, Brazil.
| | - Daiane Elisa Wilsmann
- Centro de Diagnóstico e Pesquisa em Patologia Aviária, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves 8824, 91540-00, Porto Alegre, RS, Brazil.
| | - Henrique Ribeiro Piaggio Cardoso
- Laboratório de Metalurgia Física, Escola de Engenharia, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves 9500, 91501-970, Porto Alegre, RS, Brazil.
| | - Annelise Kopp Alves
- Departamento de Materiais, Escola de Engenharia, Universidade Federal do Rio Grande do Sul, Avenida Osvaldo Aranha 99, 90035-190, Porto Alegre, RS, Brazil.
| | - Gabriela Zottis Chitolina
- Centro de Diagnóstico e Pesquisa em Patologia Aviária, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves 8824, 91540-00, Porto Alegre, RS, Brazil.
| | - Carlos Tadeu Pippi Salle
- Centro de Diagnóstico e Pesquisa em Patologia Aviária, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves 8824, 91540-00, Porto Alegre, RS, Brazil.
| | - Hamilton Luiz de Souza Moraes
- Centro de Diagnóstico e Pesquisa em Patologia Aviária, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves 8824, 91540-00, Porto Alegre, RS, Brazil.
| | - Vladimir Pinheiro do Nascimento
- Centro de Diagnóstico e Pesquisa em Patologia Aviária, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves 8824, 91540-00, Porto Alegre, RS, Brazil.
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14
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Moreira Martins PM, Gong T, de Souza AA, Wood TK. Copper Kills Escherichia coli Persister Cells. Antibiotics (Basel) 2020; 9:antibiotics9080506. [PMID: 32806704 PMCID: PMC7459663 DOI: 10.3390/antibiotics9080506] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Revised: 08/07/2020] [Accepted: 08/10/2020] [Indexed: 02/04/2023] Open
Abstract
Due to their reduced metabolism, persister cells can survive most antimicrobial treatments, which usually rely on corrupting active biochemical pathways. Therefore, molecules that kill bacterial persisters should function in a metabolism-independent manner. Some anti-persister compounds have been found previously, such as the DNA-crosslinkers mitomycin C and cisplatin, but more effective and lower cost alternatives are needed. Copper alloys have been used since ancient times due to their antimicrobial properties, and they are still used in agriculture to control plant bacterial diseases. By stopping transcription with rifampicin and by treating with ampicillin to remove non-persister cells, we created a population that consists solely of Escherichia coli persister cells. Using this population of persister cells, we demonstrate that cupric compounds kill E. coli persister cells. Hence, copper ions may be used in controlling the spread of important bacterial strains that withstand treatment with conventional antimicrobials by forming persister cells.
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Affiliation(s)
- Paula Maria Moreira Martins
- Department of Chemical Engineering, Pennsylvania State University, University Park, PA 16802, USA; (P.M.M.M.); (T.G.)
- Biotechnology Lab, Centro de Citricultura Sylvio Moreira, Instituto Agronômico de Campinas, Cordeirópolis-SP 13490-970, Brazil;
| | - Ting Gong
- Department of Chemical Engineering, Pennsylvania State University, University Park, PA 16802, USA; (P.M.M.M.); (T.G.)
| | - Alessandra A. de Souza
- Biotechnology Lab, Centro de Citricultura Sylvio Moreira, Instituto Agronômico de Campinas, Cordeirópolis-SP 13490-970, Brazil;
| | - Thomas K. Wood
- Department of Chemical Engineering, Pennsylvania State University, University Park, PA 16802, USA; (P.M.M.M.); (T.G.)
- Correspondence:
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15
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The Use of Copper as an Antimicrobial Agent in Health Care, Including Obstetrics and Gynecology. Clin Microbiol Rev 2019; 32:32/4/e00125-18. [PMID: 31413046 DOI: 10.1128/cmr.00125-18] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Health care-associated infections (HAIs) are a global problem associated with significant morbidity and mortality. Controlling the spread of antimicrobial-resistant bacteria is a major public health challenge, and antimicrobial resistance has become one of the most important global problems in current times. The antimicrobial effect of copper has been known for centuries, and ongoing research is being conducted on the use of copper-coated hard and soft surfaces for reduction of microbial contamination and, subsequently, reduction of HAIs. This review provides an overview of the historical and current evidence of the antimicrobial and wound-healing properties of copper and explores its possible utility in obstetrics and gynecology.
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16
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Wang X, Dong H, Liu J, Qin G, Chen D, Zhang E. In vivo antibacterial property of Ti-Cu sintered alloy implant. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 100:38-47. [DOI: 10.1016/j.msec.2019.02.084] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2017] [Revised: 01/21/2019] [Accepted: 02/21/2019] [Indexed: 12/21/2022]
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17
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Quesille-Villalobos AM, Parra A, Maza F, Navarrete P, González M, Latorre M, Toro M, Reyes-Jara A. The Combined Effect of Cold and Copper Stresses on the Proliferation and Transcriptional Response of Listeria monocytogenes. Front Microbiol 2019; 10:612. [PMID: 30984140 PMCID: PMC6447683 DOI: 10.3389/fmicb.2019.00612] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Accepted: 03/11/2019] [Indexed: 11/13/2022] Open
Abstract
Listeria monocytogenes is a foodborne pathogen that can cause severe disease in susceptible humans. This microorganism has the ability to adapt to hostile environmental conditions such as the low temperatures used by the food industry for controlling microorganisms. Bacteria are able to adjust their transcriptional response to adapt to stressful conditions in order to maintain cell homeostasis. Understanding the transcriptional response of L. monocytogenes to stressing conditions could be relevant to develop new strategies to control the pathogen. A possible alternative for controlling microorganisms in the food industry could be to use copper as an antimicrobial agent. The present study characterized three L. monocytogenes strains (List2-2, Apa13-2, and Al152-2A) adapted to low temperature and challenged with different copper concentrations. Similar MIC-Cu values were observed among studied strains, but growth kinetic parameters revealed that strain List2-2 was the least affected by the presence of copper at 8°C. This strain was selected for a global transcriptional response study after a 1 h exposition to 0.5 mM of CuSO4 × 5H2O at 8 and 37°C. The results showed that L. monocytogenes apparently decreases its metabolism in response to copper, and this reduction is greater at 8°C than at 37°C. The most affected metabolic pathways were carbohydrates, lipids and nucleotides synthesis. Finally, 15 genes were selected to evaluate the conservation of the transcriptional response in the other two strains. Results indicated that only genes related to copper homeostasis showed a high degree of conservation between the strains studied, suggesting that a low number of genes is implicated in the response to copper stress in L. monocytogenes. These results contribute to the understanding of the molecular mechanisms used by bacteria to overcome a combination of stresses. This study concluded that the application of copper in low concentrations in cold environments may help to control foodborne pathogens as L. monocytogenes in the industry.
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Affiliation(s)
- Ana María Quesille-Villalobos
- Laboratorio de Microbiología y Probióticos, Instituto de Nutrición y Tecnología de los Alimentos (INTA), Universidad de Chile, Santiago, Chile
| | - Angel Parra
- Laboratorio de Microbiología y Probióticos, Instituto de Nutrición y Tecnología de los Alimentos (INTA), Universidad de Chile, Santiago, Chile
| | - Felipe Maza
- Laboratorio de Microbiología y Probióticos, Instituto de Nutrición y Tecnología de los Alimentos (INTA), Universidad de Chile, Santiago, Chile
| | - Paola Navarrete
- Laboratorio de Microbiología y Probióticos, Instituto de Nutrición y Tecnología de los Alimentos (INTA), Universidad de Chile, Santiago, Chile
- Millennium Nucleus in the Biology of Intestinal Microbiota, Santiago, Chile
| | - Mauricio González
- Laboratorio de Bioinformática y Expresión Génica, Instituto de Nutrición y Tecnología de los Alimentos (INTA), Universidad de Chile, Santiago, Chile
- FONDAP Center for Genome Regulation (CGR), Santiago, Chile
- Mathomics, Center for Mathematical Modeling, Universidad de Chile, Santiago, Chile
| | - Mauricio Latorre
- Laboratorio de Bioinformática y Expresión Génica, Instituto de Nutrición y Tecnología de los Alimentos (INTA), Universidad de Chile, Santiago, Chile
- FONDAP Center for Genome Regulation (CGR), Santiago, Chile
- Mathomics, Center for Mathematical Modeling, Universidad de Chile, Santiago, Chile
- Instituto de Ciencias de la Ingeniería, Universidad de O’Higgins, Rancagua, Chile
| | - Magaly Toro
- Laboratorio de Microbiología y Probióticos, Instituto de Nutrición y Tecnología de los Alimentos (INTA), Universidad de Chile, Santiago, Chile
| | - Angélica Reyes-Jara
- Laboratorio de Microbiología y Probióticos, Instituto de Nutrición y Tecnología de los Alimentos (INTA), Universidad de Chile, Santiago, Chile
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18
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Parra A, Toro M, Jacob R, Navarrete P, Troncoso M, Figueroa G, Reyes-Jara A. Antimicrobial effect of copper surfaces on bacteria isolated from poultry meat. Braz J Microbiol 2018; 49 Suppl 1:113-118. [PMID: 30181050 PMCID: PMC6328842 DOI: 10.1016/j.bjm.2018.06.008] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Revised: 05/15/2018] [Accepted: 06/05/2018] [Indexed: 01/08/2023] Open
Abstract
Poultry meat is a food product that usually carries high rates of microbial contamination, including foodborne pathogens. The poultry industry has established different systems to minimize these hazards. In recent years, extensive literature has demonstrated the antimicrobial activity of different contact surfaces made of copper to effectively reduce microbial loads. The aim of the present study was to evaluate the antibacterial effect of copper surfaces on the transmission of two foodborne pathogens – Salmonella enterica and Listeria monocytogenes – and a poultry native microbiota bacterial species – Enterobacter cloacae. We also evaluated the impact of the poultry meat matrix on the antimicrobial activity of a copper surface. Our results indicated that copper surfaces reduced the bacterial load quickly (<than 4 min) when the microorganisms were exposed to polished copper surfaces. Even when bacteria were inoculated on copper surfaces soiled with the organic matrix (washing water from poultry carcasses) and survival rates were significantly higher, an antimicrobial effect was still observed. Survival rates of two microorganisms simultaneously exposed to copper did not show significant differences. We found an antimicrobial effect over pathogenic and non-pathogenic microorganisms. Results suggest a potential role for copper surfaces in the control of microbiological hazards in the poultry industry.
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Affiliation(s)
- Angel Parra
- Laboratory of Microbiology and Probiotics, Institute of Nutrition and Food Technology (INTA), University of Chile, Santiago, Chile
| | - Magaly Toro
- Laboratory of Microbiology and Probiotics, Institute of Nutrition and Food Technology (INTA), University of Chile, Santiago, Chile
| | - Ricardo Jacob
- Laboratory of Microbiology and Probiotics, Institute of Nutrition and Food Technology (INTA), University of Chile, Santiago, Chile
| | - Paola Navarrete
- Laboratory of Microbiology and Probiotics, Institute of Nutrition and Food Technology (INTA), University of Chile, Santiago, Chile
| | - Miriam Troncoso
- Laboratory of Microbiology and Probiotics, Institute of Nutrition and Food Technology (INTA), University of Chile, Santiago, Chile
| | - Guillermo Figueroa
- Laboratory of Microbiology and Probiotics, Institute of Nutrition and Food Technology (INTA), University of Chile, Santiago, Chile
| | - Angélica Reyes-Jara
- Laboratory of Microbiology and Probiotics, Institute of Nutrition and Food Technology (INTA), University of Chile, Santiago, Chile.
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19
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Steinhauer K, Meyer S, Pfannebecker J, Teckemeyer K, Ockenfeld K, Weber K, Becker B. Antimicrobial efficacy and compatibility of solid copper alloys with chemical disinfectants. PLoS One 2018; 13:e0200748. [PMID: 30096209 PMCID: PMC6086424 DOI: 10.1371/journal.pone.0200748] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Accepted: 06/06/2018] [Indexed: 11/19/2022] Open
Abstract
INTRODUCTION Chemical disinfection is state of the art in preventing spread of infectious agents in the healthcare setting. Additionally, the antimicrobial properties of solid copper alloy surfaces against various microorganisms have recently been substantiated. Thus, antimicrobially active copper surfaces may serve as an additional barrier against distribution of pathogenic microorganisms and be combined with chemical disinfection measures in the hospital. The aim of this study was therefore to investigate on a quantitative basis whether the combination of chemical disinfectants with copper alloy surfaces results in an overall compromised, combined or even synergistic antimicrobial efficacy. METHODS Experiments were carried out using the quantitative carrier test devised by the German Society for Hygiene and Microbiology (DGHM) to study antimicrobial efficacy of chemical disinfectants. Requirements for microbicidal efficacy as defined by prEN 14885 were applied. The chemical disinfectants tested in our study contained alcohols (ethanol, 1-propanol), quaternary ammonium compounds (benzalkonium chloride) and glutaraldehyde as actives. Quantitative carrier tests were carried out on different carriers (tiles, copper alloy discs, stainless steel discs) using Pseudomonas aeruginosa, Staphylococcus aureus, Kocuria rhizophila and Candida albicans as test organisms. RESULTS For the alcohol-based disinfectant no difference in antimicrobial efficacy was observed when applied to antimicrobial active copper alloy carriers, tiles or stainless steel discs. For all test organisms microbial contamination was reduced to the detection limit of < 1 log (CFU/ml) within a contact time of 2 min indicating a ≥ 5 log reduction for the tested bacteria and a ≥ 4 log reduction for the yeast, as being requested for chemical disinfectants by prEN 14885. In order to elucidate a potential synergism the chemical disinfectant based on quaternary ammonium compounds (benzalkonium chloride) and glutaraldehyde was used at a sub-effective concentration. Hence, no complete reduction of microbial contamination was achieved on stainless steel or tile carriers for Pseudomonas aeruginosa and Candida albicans. Interestingly, when using copper alloy carriers complete reduction indicating a ≥ 5 log reduction for P. aeruginosa and a ≥ 4 log reduction for C. albicans was detected. Thus, data of this study indicates that solid copper alloy surfaces and disinfectants synergize. CONCLUSIONS According to this data, commercially available disinfectants based on alcohol, quaternary ammonium compounds and aldehyde can effectively be combined in a dual strategy with solid copper alloy surfaces to reduce microbial contamination.
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Affiliation(s)
- Katrin Steinhauer
- Research & Regulatory Affairs, Schülke & Mayr GmbH, Norderstedt, Germany
- * E-mail:
| | - Sonja Meyer
- Ostwestfalen-Lippe University of Applied Sciences, Department Life Science Technologies, Microbiology, Lemgo, Germany
| | - Jens Pfannebecker
- Ostwestfalen-Lippe University of Applied Sciences, Department Life Science Technologies, Microbiology, Lemgo, Germany
| | - Karin Teckemeyer
- Research & Regulatory Affairs, Schülke & Mayr GmbH, Norderstedt, Germany
| | - Klaus Ockenfeld
- Environment and Health, Deutsches Kupferinstitut Berufsverband e.V., Düsseldorf, Germany
| | - Klaus Weber
- Research & Regulatory Affairs, Schülke & Mayr GmbH, Norderstedt, Germany
| | - Barbara Becker
- Ostwestfalen-Lippe University of Applied Sciences, Department Life Science Technologies, Microbiology, Lemgo, Germany
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20
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Antimicrobial properties of ternary eutectic aluminum alloys. Biometals 2018; 31:759-770. [PMID: 29946993 DOI: 10.1007/s10534-018-0119-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Accepted: 06/12/2018] [Indexed: 01/05/2023]
Abstract
Several Escherichia coli deletion mutants of the Keio collection were selected for analysis to better understand which genes may play a key role in copper or silver homeostasis. Each of the selected E. coli mutants had a deletion of a single gene predicted to encode proteins for homologous recombination or contained functions directly linked to copper or silver transport or transformation. The survival of these strains on pure copper surfaces, stainless steel, and alloys of aluminum, copper and/or silver was investigated. When exposed to pure copper surfaces, E. coli ΔcueO was the most sensitive, whereas E. coli ΔcopA was the most resistant amongst the different strains tested. However, we observed a different trend in sensitivities in E. coli strains upon exposure to alloys of the system Al-Ag-Cu. While minor antimicrobial effects were detected after exposure of E. coli ΔcopA and E. coli ΔrecA to Al-Ag alloys, no effect was detected after exposure to Al-Cu alloys. The release of copper ions and cell-associated copper ion concentrations were determined for E. coli ΔcopA and the wild-type E. coli after exposure to pure copper surfaces. Altogether, compared to binary alloys, ternary eutectic alloys (Al-Ag-Cu) had the highest antimicrobial effect and thus, warrant further investigation.
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21
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Vincent M, Duval RE, Hartemann P, Engels-Deutsch M. Contact killing and antimicrobial properties of copper. J Appl Microbiol 2018; 124:1032-1046. [PMID: 29280540 DOI: 10.1111/jam.13681] [Citation(s) in RCA: 270] [Impact Index Per Article: 45.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2017] [Revised: 12/06/2017] [Accepted: 12/20/2017] [Indexed: 12/15/2022]
Abstract
With the emergence of antibiotic resistance, the interest for antimicrobial agents has recently increased again in public health. Copper was recognized in 2008 by the United States Environmental Protection Agency (EPA) as the first metallic antimicrobial agent. This led to many investigations of the various properties of copper as an antibacterial, antifungal and antiviral agent. This review summarizes the latest findings about 'contact killing', the mechanism of action of copper nanoparticles and the different ways micro-organisms develop resistance to copper.
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Affiliation(s)
- M Vincent
- CNRS, LEMTA, UMR 7563, Vandœuvre-lès-Nancy, France.,Université de Lorraine, LEMTA, UMR 7563, Vandœuvre-lès Nancy, France
| | - R E Duval
- CNRS, UMR 7565, SRSMC, Vandœuvre-lès-Nancy, France.,Université de Lorraine, UMR 7565, SRSMC, Nancy, France.,ABC Platform®, Nancy, France
| | - P Hartemann
- Faculté de Médecine, EA 7298, ERAMBO, DESP, Vandœuvre-lès-Nancy, France
| | - M Engels-Deutsch
- CNRS, LEMTA, UMR 7563, Vandœuvre-lès-Nancy, France.,Université de Lorraine, LEMTA, UMR 7563, Vandœuvre-lès Nancy, France.,Faculté de Médecine, EA 7298, ERAMBO, DESP, Vandœuvre-lès-Nancy, France
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22
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Araújo IMS, Silva RR, Pacheco G, Lustri WR, Tercjak A, Gutierrez J, Júnior JRS, Azevedo FHC, Figuêredo GS, Vega ML, Ribeiro SJL, Barud HS. Hydrothermal synthesis of bacterial cellulose-copper oxide nanocomposites and evaluation of their antimicrobial activity. Carbohydr Polym 2017; 179:341-349. [PMID: 29111060 DOI: 10.1016/j.carbpol.2017.09.081] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Revised: 09/12/2017] [Accepted: 09/25/2017] [Indexed: 01/01/2023]
Abstract
In this work, for the first time bacterial cellulose (BC) hydrogel membranes were used for the fabrication of antimicrobial cellulosic nanocomposites by hydrothermal deposition of Cu derivative nanoparticles (i.e.Cu(0) and CuxOy species). BC-Cu nanocomposites were characterized by FTIR, SEM, AFM, XRD and TGA, to study the effect of hydrothermal processing time on the final physicochemical properties of final products. XRD result show that depending on heating time (3-48h), different CuxOy phases were achieved. SEM and AFM analyses unveil the presence of the Cu(0) and copper CuxOy nanoparticles over BC fibrils while the surface of 3D network became more compact and smother for longer heating times. Furthermore, the increase of heating time placed deleterious effect on the structure of BC network leading to decrease of BC crystallinity as well as of the on-set degradation temperature. Notwithstanding, BC-Cu nanocomposites showed excellent antimicrobial activity against E. coli, S. aureus and Salmonella bacteria suggesting potential applications as bactericidal films.
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Affiliation(s)
- Inês M S Araújo
- Universidade Federal do Piauí, Departamento de Química, Campus Ministro Petrônio Portela, Uninga, 64049-550,Teresina, PI, Brazil.
| | - Robson R Silva
- Universidade Estadual Paulista Júlio de Mesquita Filho, Instituto de Química de Araraquara, Departamento de Química Geral e Inorgânica, Rua Professor Francisco Degni, 55, Jardim Quitandinha, 14.800-060, Araraquara, SP, Brazil; Instituto de Física de São Carlos, Universidade São Paulo, 13560-970, São Carlos, SP, Brazil..
| | - Guilherme Pacheco
- Universidade de Araraquara, Uniara, Laboratório de Biopolímeros e Biomateriais (BIOPOLMAT), Rua. Carlos Gomes, 1217, 14.801-320, Araraquara, SP, Brazil.
| | - Wilton R Lustri
- Universidade de Araraquara, Uniara, Laboratório de Biopolímeros e Biomateriais (BIOPOLMAT), Rua. Carlos Gomes, 1217, 14.801-320, Araraquara, SP, Brazil.
| | - Agnieszka Tercjak
- University of the Basque Country (UPV/EHU), Dpto. Ingeniería Química y del Medio Ambiente, Escuela Politécnica Donostia-San Sebastián, Pza. Europa 1, 20018, Donostia-San Sebastián, Spain.
| | - Junkal Gutierrez
- University of the Basque Country (UPV/EHU), Dpto. Ingeniería Química y del Medio Ambiente, Escuela Politécnica Donostia-San Sebastián, Pza. Europa 1, 20018, Donostia-San Sebastián, Spain.
| | - José R S Júnior
- Universidade Federal do Piauí, Departamento de Química, Campus Ministro Petrônio Portela, Uninga, 64049-550,Teresina, PI, Brazil.
| | - Francisco H C Azevedo
- Universidade Luterana do Brasil, Programa de Pós Graduação Em Genética e Toxicologia Aplicada, Av. Farroupilha, 8001, Prédio 01, São Luís, 92.450-900, Canoas, RS, Brazil.
| | - Girlene S Figuêredo
- Universidade Federal do Piauí, Departamento de Química, Campus Ministro Petrônio Portela, Uninga, 64049-550,Teresina, PI, Brazil.
| | - Maria L Vega
- Universidade Federal do Piauí, Departamento de Química, Campus Ministro Petrônio Portela, Uninga, 64049-550,Teresina, PI, Brazil.
| | - Sidney J L Ribeiro
- Universidade Estadual Paulista Júlio de Mesquita Filho, Instituto de Química de Araraquara, Departamento de Química Geral e Inorgânica, Rua Professor Francisco Degni, 55, Jardim Quitandinha, 14.800-060, Araraquara, SP, Brazil.
| | - Hernane S Barud
- Universidade de Araraquara, Uniara, Laboratório de Biopolímeros e Biomateriais (BIOPOLMAT), Rua. Carlos Gomes, 1217, 14.801-320, Araraquara, SP, Brazil.
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23
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Bai B, Zhang E, Liu J, Zhu J. The anti-bacterial activity of titanium-copper sintered alloy against Porphyromonas gingivalis in vitro. Dent Mater J 2017; 35:659-67. [PMID: 27477233 DOI: 10.4012/dmj.2016-001] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This study investigates the anti-bacterial property of Ti-Cu sintered alloys against Porphyromonas gingivalis. The anti-anaerobic property of Ti-Cu sintered alloys against P. gingivalis was investigated by antibacterial activity test, DNA measurement, DAPI staining and morphology observation. The antibacterial rates of the Ti-5Cu against P. gingivalis after 18 and 24 h incubation were 36.04 and 54.39%, and those of Ti-10Cu were 68.69 and 75.39%, which were lower than their anti-aerobic abilities. The concentration of P. gingivalis DNA gradually decreased with the increasing Cu content, which was nearly 50% after 24 h incubation on Ti-10Cu. SEM results showed that the shape of P. gingivalis changed and the bacteria broke apart with the addition of Cu and the extension of the culture time. Ti-Cu sintered alloys could not only kill anaerobic bacteria but also reduce the activity of the survived bacteria. The anti-anaerobic mechanism was thought to be in associated with the Cu ion released from Ti-Cu alloy.
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Affiliation(s)
- Bing Bai
- Department of Prosthodontics, School of Stomatology, China Medical University
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Hoseinnejad M, Jafari SM, Katouzian I. Inorganic and metal nanoparticles and their antimicrobial activity in food packaging applications. Crit Rev Microbiol 2017; 44:161-181. [DOI: 10.1080/1040841x.2017.1332001] [Citation(s) in RCA: 166] [Impact Index Per Article: 23.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Mahmoud Hoseinnejad
- Department of Food Materials and Process Design Engineering, Gorgan University of Agricultural Science and Natural Resources, Gorgan, Iran
| | - Seid Mahdi Jafari
- Department of Food Materials and Process Design Engineering, Gorgan University of Agricultural Science and Natural Resources, Gorgan, Iran
| | - Iman Katouzian
- Department of Food Materials and Process Design Engineering, Gorgan University of Agricultural Science and Natural Resources, Gorgan, Iran
- Nano-encapsulation in the Food, Nutraceutical, and Pharmaceutical Industries Group (NFNPIG), Universal Scientific Education and Research Network (USERN), Tehran, Iran
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25
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Killing of bacteria by copper, cadmium, and silver surfaces reveals relevant physicochemical parameters. Biointerphases 2017; 12:020301. [DOI: 10.1116/1.4980127] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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26
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Druvari D, Koromilas ND, Lainioti GC, Bokias G, Vasilopoulos G, Vantarakis A, Baras I, Dourala N, Kallitsis JK. Polymeric Quaternary Ammonium-Containing Coatings with Potential Dual Contact-Based and Release-Based Antimicrobial Activity. ACS APPLIED MATERIALS & INTERFACES 2016; 8:35593-35605. [PMID: 27976854 DOI: 10.1021/acsami.6b14463] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In the present work, reactive blending of copolymers with complementary functional groups was applied to control their antimicrobial activity and antifouling action in real conditions. For this purpose, two series of copolymers, poly(4-vinylbenzyl chloride-co-acrylic acid), P(VBC-co-AAx), and poly(sodium 4-styrenesulfonate-co-glycidyl methacrylate), P(SSNa-co-GMAx), were synthesized via free radical copolymerization and further modified by the incorporation of biocidal units either covalently (4-vinyl benzyl dimethylhexadecylammonium chloride, VBCHAM) or electrostatically bound (cetyltrimethylammonium 4-styrenesulfonate, SSAmC16). The cross-linking reaction of the carboxylic group of acrylic acid (AA) with the epoxide group of glycidyl methacrylate (GMA) of these two series of reactive antimicrobial copolymers was explored in blends obtained through solution casting after curing at various temperatures. The combined results from the ATR-FTIR characterization of the membranes, solubility tests, turbidimetry, and TEM suggest that the reaction occurs already at 80 °C, leading mostly to graft samples, while at higher curing temperatures (120 or 150 °C) insoluble cross-linked samples are usually obtained. Controlled release experiments of selected membranes were performed in pure water and aqueous 1 M NaCl solutions for a period of two months. The released material was followed through gravimetry and TOC/TN measurements, while the evolution of the integrity and the morphology of the membranes were followed visually and through SEM, respectively. Antimicrobial tests also revealed that the cross-linked membranes presented strong antimicrobial activity against S. aureus and P. aeruginosa. Finally, a specific blend combination was applied on aquaculture nets and cured at 80 °C. The modified nets, emerged in the sea for 15 and 35 days, exhibited high antifouling action as compared to blank nets.
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Affiliation(s)
- Denisa Druvari
- Department of Chemistry, University of Patras , GR-26504, Patras, Greece
| | - Nikos D Koromilas
- Department of Chemistry, University of Patras , GR-26504, Patras, Greece
| | - Georgia Ch Lainioti
- Department of Chemistry, University of Patras , GR-26504, Patras, Greece
- FORTH/ICE-HT, Stadiou Street, P.O. Box 1414, GR-26504, Rio-Patras, Greece
| | - Georgios Bokias
- Department of Chemistry, University of Patras , GR-26504, Patras, Greece
- FORTH/ICE-HT, Stadiou Street, P.O. Box 1414, GR-26504, Rio-Patras, Greece
| | - Gavriil Vasilopoulos
- Environmental Microbiology, Department of Public Health, Medical School, University of Patras , Patras, GR-26504, Greece
| | - Apostolos Vantarakis
- Environmental Microbiology, Department of Public Health, Medical School, University of Patras , Patras, GR-26504, Greece
| | - Ilias Baras
- SELONDA Aquaculture SA, 30 Navarchou Nikodimou Street, Athens, GR-10556, Greece
| | - Nancy Dourala
- SELONDA Aquaculture SA, 30 Navarchou Nikodimou Street, Athens, GR-10556, Greece
| | - Joannis K Kallitsis
- Department of Chemistry, University of Patras , GR-26504, Patras, Greece
- FORTH/ICE-HT, Stadiou Street, P.O. Box 1414, GR-26504, Rio-Patras, Greece
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A new antibacterial Co-Cr-Mo-Cu alloy: Preparation, biocorrosion, mechanical and antibacterial property. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 69:134-43. [DOI: 10.1016/j.msec.2016.05.028] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Revised: 04/06/2016] [Accepted: 05/03/2016] [Indexed: 11/23/2022]
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Antibacterial Metallic Touch Surfaces. MATERIALS 2016; 9:ma9090736. [PMID: 28773856 PMCID: PMC5457048 DOI: 10.3390/ma9090736] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Revised: 08/17/2016] [Accepted: 08/24/2016] [Indexed: 12/20/2022]
Abstract
Our aim is to present a comprehensive review of the development of modern antibacterial metallic materials as touch surfaces in healthcare settings. Initially we compare Japanese, European and US standards for the assessment of antimicrobial activity. The variations in methodologies defined in these standards are highlighted. Our review will also cover the most relevant factors that define the antimicrobial performance of metals, namely, the effect of humidity, material geometry, chemistry, physical properties and oxidation of the material. The state of the art in contact-killing materials will be described. Finally, the effect of cleaning products, including disinfectants, on the antimicrobial performance, either by direct contact or by altering the touch surface chemistry on which the microbes attach, will be discussed. We offer our outlook, identifying research areas that require further development and an overview of potential future directions of this exciting field.
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Sikora P, Augustyniak A, Cendrowski K, Horszczaruk E, Rucinska T, Nawrotek P, Mijowska E. Characterization of Mechanical and Bactericidal Properties of Cement Mortars Containing Waste Glass Aggregate and Nanomaterials. MATERIALS 2016; 9:ma9080701. [PMID: 28773823 PMCID: PMC5512523 DOI: 10.3390/ma9080701] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Revised: 08/07/2016] [Accepted: 08/10/2016] [Indexed: 12/25/2022]
Abstract
The recycling of waste glass is a major problem for municipalities worldwide. The problem concerns especially colored waste glass which, due to its low recycling rate as result of high level of impurity, has mostly been dumped into landfills. In recent years, a new use was found for it: instead of creating waste, it can be recycled as an additive in building materials. The aim of the study was to evaluate the possibility of manufacturing sustainable and self-cleaning cement mortars with use of commercially available nanomaterials and brown soda-lime waste glass. Mechanical and bactericidal properties of cement mortars containing brown soda-lime waste glass and commercially available nanomaterials (amorphous nanosilica and cement containing nanocrystalline titanium dioxide) were analyzed in terms of waste glass content and the effectiveness of nanomaterials. Quartz sand is replaced with brown waste glass at ratios of 25%, 50%, 75% and 100% by weight. Study has shown that waste glass can act as a successful replacement for sand (up to 100%) to produce cement mortars while nanosilica is incorporated. Additionally, a positive effect of waste glass aggregate for bactericidal properties of cement mortars was observed.
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Affiliation(s)
- Pawel Sikora
- Faculty of Civil Engineering and Architecture, West Pomeranian University of Technology, Al. Piastow 50, Szczecin 71-311, Poland.
| | - Adrian Augustyniak
- Faculty of Biotechnology and Animal Husbandry, West Pomeranian University of Technology, Doktora Judyma st. 26, Szczecin 71-466, Poland.
| | - Krzysztof Cendrowski
- Faculty of Chemical Technology and Engineering, Institute of Chemical and Environment Engineering, West Pomeranian University of Technology, Al. Piastow 45, Szczecin 71-311, Poland.
| | - Elzbieta Horszczaruk
- Faculty of Civil Engineering and Architecture, West Pomeranian University of Technology, Al. Piastow 50, Szczecin 71-311, Poland.
| | - Teresa Rucinska
- Faculty of Civil Engineering and Architecture, West Pomeranian University of Technology, Al. Piastow 50, Szczecin 71-311, Poland.
| | - Pawel Nawrotek
- Faculty of Biotechnology and Animal Husbandry, West Pomeranian University of Technology, Doktora Judyma st. 26, Szczecin 71-466, Poland.
| | - Ewa Mijowska
- Faculty of Chemical Technology and Engineering, Institute of Chemical and Environment Engineering, West Pomeranian University of Technology, Al. Piastow 45, Szczecin 71-311, Poland.
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Vincent M, Hartemann P, Engels-Deutsch M. Antimicrobial applications of copper. Int J Hyg Environ Health 2016; 219:585-591. [PMID: 27318723 DOI: 10.1016/j.ijheh.2016.06.003] [Citation(s) in RCA: 144] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Revised: 05/16/2016] [Accepted: 06/02/2016] [Indexed: 01/23/2023]
Abstract
Copper has long been known to have antimicrobial activity and is used in drinking water treatment and transportation. It has been recognized by the American Environmental Protection Agency as the first metallic antimicrobial agent in 2008. With ongoing waterborne hospital-acquired infections and antibiotic resistance, research on copper as an antimicrobial agent is again very attractive. Many studies have shown that the use of copper surface and copper particles could significantly reduce the environmental bioburden. This review highlights in its first part all the conditions described in the literature to enhance copper antimicrobial activity. Secondly, the different antimicrobial applications of copper in water treatment, hospital care units and public applications are presented. Finally, the future research needs on copper as an antimicrobial agent are discussed.
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Affiliation(s)
- Marin Vincent
- CNRS, LEMTA, UMR 7563, Vandœuvre-lès-Nancy F-54500, France; Université de Lorraine, LEMTA, UMR 7563, Vandœuvre-lès-Nancy F-54500, France
| | - Philippe Hartemann
- Université de Lorraine, DESP, Faculté de Médecine, INSERM EA 7298, Vandœuvre-lès-Nancy F-54500, France
| | - Marc Engels-Deutsch
- CNRS, LEMTA, UMR 7563, Vandœuvre-lès-Nancy F-54500, France; Université de Lorraine, LEMTA, UMR 7563, Vandœuvre-lès-Nancy F-54500, France; Université de Lorraine, DESP, Faculté de Médecine, INSERM EA 7298, Vandœuvre-lès-Nancy F-54500, France.
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Blanquer A, Hynowska A, Nogués C, Ibáñez E, Sort J, Baró MD, Özkale B, Pané S, Pellicer E, Barrios L. Effect of Surface Modifications of Ti40Zr10Cu38Pd12 Bulk Metallic Glass and Ti-6Al-4V Alloy on Human Osteoblasts In Vitro Biocompatibility. PLoS One 2016; 11:e0156644. [PMID: 27243628 PMCID: PMC4887090 DOI: 10.1371/journal.pone.0156644] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Accepted: 05/17/2016] [Indexed: 01/03/2023] Open
Abstract
The use of biocompatible materials, including bulk metallic glasses (BMGs), for tissue regeneration and transplantation is increasing. The good mechanical and corrosion properties of Ti40Zr10Cu38Pd12 BMG and its previously described biocompatibility makes it a potential candidate for medical applications. However, it is known that surface properties like topography might play an important role in regulating cell adhesion, proliferation and differentiation. Thus, in the present study, Ti40Zr10Cu38Pd12 BMG and Ti6-Al-4V alloy were surface-modified electrochemically (nanomesh) or physically (microscratched) to investigate the effect of material topography on human osteoblasts cells (Saos-2) adhesion, proliferation and differentiation. For comparative purposes, the effect of mirror-like polished surfaces was also studied. Electrochemical treatments led to a highly interconnected hierarchical porous structure rich in oxides, which have been described to improve corrosion resistance, whereas microscratched surfaces showed a groove pattern with parallel trenches. Cell viability was higher than 96% for the three topographies tested and for both alloy compositions. In all cases, cells were able to adhere, proliferate and differentiate on the alloys, hence indicating that surface topography plays a minor role on these processes, although a clear cell orientation was observed on microscratched surfaces. Overall, our results provide further evidence that Ti40Zr10Cu38Pd12 BMG is an excellent candidate, in the present two topographies, for bone repair purposes.
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Affiliation(s)
- Andreu Blanquer
- Departament de Biologia Cel·lular, Fisiologia i Immunologia, Universitat Autònoma de Barcelona, Edifici Cc, Bellaterra, Spain
| | - Anna Hynowska
- Departament de Física, Universitat Autònoma de Barcelona, Edifici Cc, Bellaterra, Spain
| | - Carme Nogués
- Departament de Biologia Cel·lular, Fisiologia i Immunologia, Universitat Autònoma de Barcelona, Edifici Cc, Bellaterra, Spain
| | - Elena Ibáñez
- Departament de Biologia Cel·lular, Fisiologia i Immunologia, Universitat Autònoma de Barcelona, Edifici Cc, Bellaterra, Spain
| | - Jordi Sort
- Departament de Física, Universitat Autònoma de Barcelona, Edifici Cc, Bellaterra, Spain
- Institució Catalana de Recerca i Estudis Avançats, Barcelona, Spain
| | - Maria Dolors Baró
- Departament de Física, Universitat Autònoma de Barcelona, Edifici Cc, Bellaterra, Spain
| | - Berna Özkale
- Multi-Scale Robotics Lab, Institute of Robotics and Intelligent Systems, ETH Zurich, Zurich, Switzerland
| | - Salvador Pané
- Multi-Scale Robotics Lab, Institute of Robotics and Intelligent Systems, ETH Zurich, Zurich, Switzerland
| | - Eva Pellicer
- Departament de Física, Universitat Autònoma de Barcelona, Edifici Cc, Bellaterra, Spain
| | - Leonardo Barrios
- Departament de Biologia Cel·lular, Fisiologia i Immunologia, Universitat Autònoma de Barcelona, Edifici Cc, Bellaterra, Spain
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Reyes-Jara A, Cordero N, Aguirre J, Troncoso M, Figueroa G. Antibacterial Effect of Copper on Microorganisms Isolated from Bovine Mastitis. Front Microbiol 2016; 7:626. [PMID: 27199953 PMCID: PMC4848319 DOI: 10.3389/fmicb.2016.00626] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Accepted: 04/15/2016] [Indexed: 11/13/2022] Open
Abstract
The antimicrobial properties of copper have been recognized for several years; applying these properties to the prevention of diseases such as bovine mastitis is a new area of research. The aim of the present study was to evaluate in vitro the antimicrobial activity of copper on bacteria isolated from subclinical and clinical mastitis milk samples from two regions in Chile. A total of 327 microorganisms were recovered between March and September 2013, with different prevalence by sample origin (25 and 75% from the central and southern regions of Chile, respectively). In the central region, Escherichia coli and coagulase negative Staphylococci (CNS) were the most frequently detected in clinical mastitis cases (33%), while in the southern region S. uberis, S. aureus, and CNS were detected with frequencies of 22, 21, and 18%, respectively. Antibiotic susceptibility studies revealed that 34% of isolates were resistant to one or more antibiotics and the resistance profile was different between bacterial species and origins of isolation of the bacteria. The minimum inhibitory concentration of copper (MIC-Cu) was evaluated in all the isolates; results revealed that a concentration as low as 250 ppm copper was able to inhibit the great majority of microorganisms analyzed (65% of isolates). The remaining isolates showed a MIC-Cu between 375 and 700 ppm copper, and no growth was observed at 1000 ppm. A linear relationship was found between the logarithm of viable bacteria number and time of contact with copper. With the application of the same concentration of copper (250 ppm), CNS showed the highest tolerance to copper, followed by S. uberis and S. aureus; the least resistant was E. coli. Based on these in vitro results, copper preparations could represent a good alternative to dipping solutions, aimed at preventing the presence and multiplication of potentially pathogenic microorganisms involved in bovine mastitis disease.
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Affiliation(s)
- Angelica Reyes-Jara
- Laboratorio de Microbiología y Probióticos, Instituto de Nutricion y Tecnologia de los Alimentos, Universidad de Chile Santiago, Chile
| | - Ninoska Cordero
- Laboratorio de Microbiología y Probióticos, Instituto de Nutricion y Tecnologia de los Alimentos, Universidad de Chile Santiago, Chile
| | - Juan Aguirre
- Laboratorio de Microbiología y Probióticos, Instituto de Nutricion y Tecnologia de los Alimentos, Universidad de ChileSantiago, Chile; Departamento de Nutricion, Bromatología y Tecnología de los Alimentos, Facultad de Veterinaria, Universidad Complutense of MadridMadrid, Spain
| | - Miriam Troncoso
- Laboratorio de Microbiología y Probióticos, Instituto de Nutricion y Tecnologia de los Alimentos, Universidad de Chile Santiago, Chile
| | - Guillermo Figueroa
- Laboratorio de Microbiología y Probióticos, Instituto de Nutricion y Tecnologia de los Alimentos, Universidad de Chile Santiago, Chile
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Kougia E, Tselepi M, Vasilopoulos G, Lainioti GC, Koromilas ND, Druvari D, Bokias G, Vantarakis A, Kallitsis JK. Evaluation of Antimicrobial Efficiency of New Polymers Comprised by Covalently Attached and/or Electrostatically Bound Bacteriostatic Species, Based on Quaternary Ammonium Compounds. Molecules 2015; 20:21313-27. [PMID: 26633329 PMCID: PMC6332343 DOI: 10.3390/molecules201219768] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2015] [Revised: 11/22/2015] [Accepted: 11/24/2015] [Indexed: 11/26/2022] Open
Abstract
In the present work a detailed study of new bacteriostatic copolymers with quaternized ammonium groups introduced in the polymer chain through covalent attachment or electrostatic interaction, was performed. Different copolymers have been considered since beside the active species, the hydrophobic/hydrophilic nature of the co-monomer was also evaluated in the case of covalently attached bacteriostatic groups, aiming at achieving permanent antibacterial activity. Homopolymers with quaternized ammonium/phosphonium groups were also tested for comparison reasons. The antimicrobial activity of the synthesized polymers after 3 and 24 h of exposure at 4 and 22 °C was investigated on cultures of Gram-negative (P. aeruginosa, E. coli) and Gram-positive (S. aureus, E. faecalis) bacteria. It was found that the combination of the hydrophilic monomer acrylic acid (AA), at low contents, with the covalently attached bacteriostatic group vinyl benzyl dimethylhexadecylammonium chloride (VBCHAM) in the copolymer P(AA-co-VBCHAM88), resulted in a high bacteriostatic activity against P. aeruginosa and E. faecalis (6 log reduction in certain cases). Moreover, the combination of covalently attached VBCHAM units with electrostatically bound cetyltrimethylammonium 4-styrene sulfonate (SSAmC16) units in the P(SSAmC16-co-VBCHAMx) copolymers led to efficient antimicrobial materials, especially against Gram-positive bacteria, where a log reduction between 4.9 and 6.2 was verified. These materials remain remarkably efficient even when they are incorporated in polysulfone membranes.
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Affiliation(s)
- Efstathia Kougia
- Environmental Microbiology, Department of Public Health, Medical School, University of Patras, 26504 Patras, Greece.
| | - Maria Tselepi
- Environmental Microbiology, Department of Public Health, Medical School, University of Patras, 26504 Patras, Greece.
| | - Gavriil Vasilopoulos
- Environmental Microbiology, Department of Public Health, Medical School, University of Patras, 26504 Patras, Greece.
| | | | - Nikos D Koromilas
- Department of Chemistry, University of Patras, 26504 Patras, Greece.
| | - Denisa Druvari
- Department of Chemistry, University of Patras, 26504 Patras, Greece.
| | - Georgios Bokias
- Department of Chemistry, University of Patras, 26504 Patras, Greece.
| | - Apostolos Vantarakis
- Environmental Microbiology, Department of Public Health, Medical School, University of Patras, 26504 Patras, Greece.
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San K, Long J, Michels CA, Gadura N. Antimicrobial copper alloy surfaces are effective against vegetative but not sporulated cells of gram-positive Bacillus subtilis. Microbiologyopen 2015; 4:753-63. [PMID: 26185055 PMCID: PMC4618608 DOI: 10.1002/mbo3.276] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Revised: 05/25/2015] [Accepted: 06/15/2015] [Indexed: 12/11/2022] Open
Abstract
This study explores the role of membrane phospholipid peroxidation in the copper alloy mediated contact killing of Bacillus subtilis, a spore-forming gram-positive bacterial species. We found that B. subtilis endospores exhibited significant resistance to copper alloy surface killing but vegetative cells were highly sensitive to copper surface exposure. Cell death and lipid peroxidation occurred in B. subtilis upon copper alloy surface exposure. In a sporulation-defective strain carrying a deletion of almost the entire SpoIIA operon, lipid peroxidation directly correlated with cell death. Moreover, killing and lipid peroxidation initiated immediately and at a constant rate upon exposure to the copper surface without the delay observed previously in E. coli. These findings support the hypothesis that membrane lipid peroxidation is the initiating event causing copper surface induced cell death of B. subtilis vegetative cells. The findings suggest that the observed differences in the kinetics of copper-induced killing compared to E. coli result from differences in cell envelop structure. As demonstrated in E. coli, DNA degradation was shown to be a secondary effect of copper exposure in a B. subtilis sporulation-defective strain.
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Affiliation(s)
- Kaungmyat San
- Department of Biological Sciences and Geology, Queensborough Community College - CUNY, 222-05 56th Avenue, Bayside, New York, 11364
| | - Janet Long
- Department of Biological Sciences and Geology, Queensborough Community College - CUNY, 222-05 56th Avenue, Bayside, New York, 11364
| | - Corinne A Michels
- Biology Department, Queens College - CUNY, 65-30 Kissena Boulevard, Flushing, New York, 11367
| | - Nidhi Gadura
- Department of Biological Sciences and Geology, Queensborough Community College - CUNY, 222-05 56th Avenue, Bayside, New York, 11364
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Liu C, Zhang E. Biocorrosion properties of antibacterial Ti-10Cu sintered alloy in several simulated biological solutions. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2015; 26:142. [PMID: 25737127 DOI: 10.1007/s10856-015-5459-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2014] [Accepted: 01/18/2015] [Indexed: 06/04/2023]
Abstract
Ti-10Cu sintered alloy has shown strong antibacterial properties against S. aureus and E. coli and good cell biocompatibility, which displays potential application in dental application. The corrosion behaviors of the alloy in five different simulated biological solutions have been investigated by electrochemical technology, surface observation, roughness measurement and immersion test. Five different simulated solutions were chosen to simulate oral condition, oral condition with F(-) ion, human body fluids with different pH values and blood system. It has been shown that Ti-10Cu alloy exhibits high corrosion rate in Saliva pH 3.5 solution and Saliva pH 6.8 + 0.2F solution but low corrosion rate in Hank's, Tyrode's and Saliva pH 6.8 solutions. The corrosion rate of Ti-10Cu alloy was in a order of Hank's, Tyrode's, Saliva pH 6.8, Saliva-pH 3.5 and Saliva pH 6.8 + 0.2F from slow to fast. All results indicated acid and F(-) containing conditions prompt the corrosion reaction of Ti-Cu alloy. It was suggested that the Cu ion release in the biological environments, especially in the acid and F(-) containing condition would lead to high antibacterial properties without any cell toxicity, displaying wide potential application of this alloy.
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Affiliation(s)
- Cong Liu
- School of Materials Science and Engineering, Jiamusi University, Jiamusi, 154007, China
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Chen YH, Wu GW, He JL. Antimicrobial brass coatings prepared on poly(ethylene terephthalate) textile by high power impulse magnetron sputtering. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 48:41-7. [DOI: 10.1016/j.msec.2014.11.017] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2013] [Revised: 06/05/2014] [Accepted: 11/06/2014] [Indexed: 10/24/2022]
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Genome Sequences of Three Highly Copper-Resistant Salmonella enterica subsp. I Serovar Typhimurium Strains Isolated from Pigs in Denmark. GENOME ANNOUNCEMENTS 2014; 2:2/6/e01334-14. [PMID: 25540347 PMCID: PMC4276825 DOI: 10.1128/genomea.01334-14] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Salmonella typhimurium is the causative agent of typhoid fever, which causes nearly 21.7 million illnesses and 217,000 deaths around the world each year. Here, we describe the draft genome sequences of the Salmonella typhimurium strains S7, S15, and S23, isolated from copper-fed pigs in Denmark and containing additional putative determinants conferring resistances to copper and other metals and metalloids.
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Zhang E, Zheng L, Liu J, Bai B, Liu C. Influence of Cu content on the cell biocompatibility of Ti-Cu sintered alloys. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 46:148-57. [PMID: 25491971 DOI: 10.1016/j.msec.2014.10.021] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2014] [Revised: 09/21/2014] [Accepted: 10/08/2014] [Indexed: 10/24/2022]
Abstract
The cell toxicity and the cell function of Ti-Cu sintered alloys with different Cu contents (2, 5, 10 and 25 wt.%, respectively) have been investigated in comparison with commercial pure titanium in order to assess the influence of Cu content on the cell biocompatibility of the Ti-Cu alloys. The cytotoxicity was studied by examining the MG63 cell response by CCK8 assessment. The cell morphology was evaluated by acridine orange/ethidium bromide (AO/EB) fluorescence and observed under scanning electronic microscopy (SEM). The cell function was monitored by measuring the AKP activity. It has been shown by the AO/EB morphology results that the cell death on both cp-Ti sample and Ti-Cu samples is due to apoptosis rather than necrosis. Although more apoptotic cells were found on the Ti-2Cu and Ti-5Cu samples, no evidence of Cu content dependent manner of apoptosis has been found. SEM observation indicated very good cell adhesion and spread on the cp-Ti sample and the Ti-Cu samples with different Cu contents. CCK8 results displayed that increase in the Cu content in Ti-Cu alloys does not bring about any difference in the cell viability. In addition, AKP test results indicated that no difference in the differentiation of MG63 was found between the cp-Ti and the Ti-Cu samples and among the Ti-Cu samples. All results indicated that Ti-Cu alloys exhibit very good cell biocompatibility and the Cu content up to 25 wt.% in the Ti-Cu alloys has no influence on the cell proliferation and differentiation.
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Affiliation(s)
- Erlin Zhang
- Key Lab. for Anisotropy and Texture of Materials, Education Ministry of China, Northeastern University, Shenyang 110819, PR China; Jiamusi University, Jiamusi 154007, PR China.
| | | | - Jie Liu
- Key Lab. for Anisotropy and Texture of Materials, Education Ministry of China, Northeastern University, Shenyang 110819, PR China; Dept. of Prosthodontics, The Affiliated Hospital of Medical College, Qingdao University, Qingdao 266003, PR China
| | - Bing Bai
- Dept. of Prosthodontics, School of Stomatology, China Medical University, Liaoning Institute of Dental Research, Shenyang 110001, PR China
| | - Cong Liu
- Jiamusi University, Jiamusi 154007, PR China
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Survival of Escherichia coli cells on solid copper surfaces is increased by glutathione. Appl Environ Microbiol 2014; 80:7071-8. [PMID: 25192999 DOI: 10.1128/aem.02842-14] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Bacteria are rapidly killed on solid copper surfaces, so this material could be useful to limit the spread of multiple-drug-resistant bacteria in hospitals. In Escherichia coli, the DNA-protecting Dps protein and the NADH:ubiquinone oxidoreductase II Ndh were not involved in tolerance to copper ions or survival on solid copper surfaces. Decreased copper tolerance under anaerobic growth conditions in the presence of ascorbate and with melibiose as the carbon source indicated that sodium-dependent symport systems may provide an import route for Cu(I) into the cytoplasm. Glutathione-free ΔcopA ΔgshA double mutants of E. coli were more rapidly inactivated on solid copper surfaces than glutathione-containing wild-type cells. Therefore, while DNA protection by Dps was not required, glutathione was needed to protect the cytoplasm and the DNA against damage mediated by solid copper surfaces, which may explain the differences in the molecular mechanisms of killing between glutathione-containing Gram-negative and glutathione-free Gram-positive bacteria.
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Zhu L, Chirase N, Ravishankar S. Use of Fulvic Acid or Sodium Silicate-Based Sanitizers to Inactivate L
isteria monocytogenes
, S
almonella
Typhimurium and P
seudomonas aeruginosa
on Food Contact Surfaces. J Food Saf 2014. [DOI: 10.1111/jfs.12106] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Libin Zhu
- School of Animal and Comparative Biomedical Sciences; University of Arizona; 1117 E. Lowell Street Tucson AZ 85721
| | | | - Sadhana Ravishankar
- School of Animal and Comparative Biomedical Sciences; University of Arizona; 1117 E. Lowell Street Tucson AZ 85721
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Zeiger M, Solioz M, Edongué H, Arzt E, Schneider AS. Surface structure influences contact killing of bacteria by copper. Microbiologyopen 2014; 3:327-32. [PMID: 24740976 PMCID: PMC4082706 DOI: 10.1002/mbo3.170] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2014] [Revised: 03/02/2014] [Accepted: 03/04/2014] [Indexed: 01/11/2023] Open
Abstract
Copper kills bacteria rapidly by a mechanism that is not yet fully resolved. The antibacterial property of copper has raised interest in its use in hospitals, in place of plastic or stainless steel. On the latter surfaces, bacteria can survive for days or even weeks. Copper surfaces could thus provide a powerful accessory measure to curb nosocomial infections. We here investigated the effect of the copper surface structure on the efficiency of contact killing of Escherichia coli, an aspect which so far has received very little attention. It was shown that electroplated copper surfaces killed bacteria more rapidly than either polished copper or native rolled copper. The release of ionic copper was also more rapid from electroplated copper compared to the other materials. Scanning electron microscopy revealed that the bacteria nudged into the grooves between the copper grains of deposited copper. The findings suggest that, in terms of contact killing, more efficient copper surfaces can be engineered.
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Affiliation(s)
- Marco Zeiger
- INM - Leibniz Institute for New Materials, Campus D2 2, 66123, Saarbrücken, Germany
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Synthesis of 6-(2-Methoxynaphthyl)-2,3-dihydro-1,2,4-triazine-3-thione as a New Reagent for Spectrophotometric Determination of Copper. Int J Anal Chem 2014; 2014:260179. [PMID: 24639872 PMCID: PMC3930163 DOI: 10.1155/2014/260179] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2013] [Accepted: 12/06/2013] [Indexed: 11/17/2022] Open
Abstract
A simple, sensitive, accurate, and green spectrophotometric method for the determination of Cu(II) using newly synthesized reagent, 6-(2-methoxynaphthyl)-2,3-dihydro-1,2,4-triazine-3-thione (MNDTT), has been developed. MNDTT was synthesized based on the acylation of methoxy naphthalene and reaction of the product with amyl nitrite, which upon reaction with thiosemicarbazide yielded 6-(2-meyhoxynaphthyl)-2,3-dihydro-1,2,4-triazine-3-thione. MNDTT produces a dark red complex with copper in methanol according to the 1 : 2 stoichiometry. Beer's law was obeyed over the concentration range of 2.5-20 µg/mL with r (2) = 0.992. The limit of detection and limit of quantification were 0.33 and 1.10 µg/mL, respectively. Within-day and between-day precision values were less than 3.68%. Finally, the method has been applied to a dental alloy (110-plus) successfully and the results were compared with atomic absorption method. The results showed that there was no significant difference between the two methods (P > 0.05).
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Liu J, Zhang X, Wang H, Li F, Li M, Yang K, Zhang E. The antibacterial properties and biocompatibility of a Ti–Cu sintered alloy for biomedical application. Biomed Mater 2014; 9:025013. [DOI: 10.1088/1748-6041/9/2/025013] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Zhang E, Li F, Wang H, Liu J, Wang C, Li M, Yang K. A new antibacterial titanium–copper sintered alloy: Preparation and antibacterial property. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 33:4280-7. [DOI: 10.1016/j.msec.2013.06.016] [Citation(s) in RCA: 198] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2013] [Revised: 05/19/2013] [Accepted: 06/18/2013] [Indexed: 02/07/2023]
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Wang Z, Zhu L, Li W, Liu H. Rapid reversible superhydrophobicity-to-superhydrophilicity transition on alternating current etched brass. ACS APPLIED MATERIALS & INTERFACES 2013; 5:4808-4814. [PMID: 23627251 DOI: 10.1021/am400299f] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Reversible surface wetting behavior is a hot topic of research because of the potential engineering applications. In the present work, a hierarchical micro/nanostructure is fabricated on brass by alternate current (AC) etching. The superhydrophilic as-prepared etched brass (EB) turns into superhydrophobic after the modification of stearic acid for 1 min. After annealing at 350 °C for 5 min, the superhydrophobic modified EB surface becomes superhydrophilic again. Furthermore, the annealed EB can restore the superhydrophobicity with the remodification of stearic acid. The wetting transition is realized by stearic acid modification and annealing rapidly in 6 min. The wetting transition mechanism is discussed based on the surface chemical analysis. This method is facile and suitable for the construction of large-scale and complex brass surfaces with tunable wetting behaviors.
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Affiliation(s)
- Zhiwei Wang
- Key Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, Beijing 100191, China
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