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Beirne DF, Dalla Via M, Velasco-Torrijos T, Montagner D. Metal-Tyrosine Kinase Inhibitors: Targeted metal-drug conjugates. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2022.214655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Xu VW, Nizami MZI, Yin IX, Yu OY, Lung CYK, Chu CH. Application of Copper Nanoparticles in Dentistry. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:805. [PMID: 35269293 PMCID: PMC8912653 DOI: 10.3390/nano12050805] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 02/25/2022] [Accepted: 02/25/2022] [Indexed: 02/07/2023]
Abstract
Nanoparticles based on metal and metallic oxides have become a novel trend for dental applications. Metal nanoparticles are commonly used in dentistry for their exclusive shape-dependent properties, including their variable nano-sizes and forms, unique distribution, and large surface-area-to-volume ratio. These properties enhance the bio-physio-chemical functionalization, antimicrobial activity, and biocompatibility of the nanoparticles. Copper is an earth-abundant inexpensive metal, and its nanoparticle synthesis is cost effective. Copper nanoparticles readily intermix and bind with other metals, ceramics, and polymers, and they exhibit physiochemical stability in the compounds. Hence, copper nanoparticles are among the commonly used metal nanoparticles in dentistry. Copper nanoparticles have been used to enhance the physical and chemical properties of various dental materials, such as dental amalgam, restorative cements, adhesives, resins, endodontic-irrigation solutions, obturation materials, dental implants, and orthodontic archwires and brackets. The objective of this review is to provide an overview of copper nanoparticles and their applications in dentistry.
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Affiliation(s)
| | - Mohammed Zahedul Islam Nizami
- Faculty of Dentistry, University of Hong Kong, Hong Kong 999077, China; (V.W.X.); (I.X.Y.); (O.Y.Y.); (C.Y.K.L.); (C.H.C.)
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Endogenous nitric oxide-generating surfaces via polydopamine-copper coatings for preventing biofilm dispersal and promoting microbial killing. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 128:112297. [PMID: 34474848 DOI: 10.1016/j.msec.2021.112297] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 06/20/2021] [Accepted: 06/30/2021] [Indexed: 01/14/2023]
Abstract
INTRODUCTION Peri-implantitis is a bacterially induced inflammatory disease which affects the hard and soft tissues around a dental implant. Microbial biofilm formation is an important causative factor in peri-implantitis. The aim of this study is to develop an effective multifunctional surface coating for antimicrobial property and to counteract oral biofilm-associated infections via a single polydopamine copper coating (PDAM@Cu) on titanium implant surface to regulate endogenous nitric oxide (NO) generation. METHODS PDAM@Cu coatings were made with different concentrations of CuCl2 on titanium surfaces with a simple dip coating technique. Coatings were characterised to evaluate Cu concentrations as well as NO release rates from the coatings. Further, salivary biofilms were made on the coatings using Brain Heart Infusion (BHI) media in an anaerobic chamber. Biofilms were prepared with three different mixtures, one of which was saliva only, the second had an addition of sheep's blood, and the third was prepared with NO donors S-nitrosoglutathione (GSNO) and L-glutathione (GSH) in the mixture of saliva and blood to evaluate the effects of endogenously produced NO on biofilms. The effectiveness of coated surfaces on biofilms were assessed using four different methods, namely, crystal violet assay, scanning electron microscopy imaging, 2,3-bis (2-methoxy-4-nitro-5-sulfophenyl)-5-[(phenylamino) carbonyl]-2H-tetrazolium hydroxide (XTT) metabolic assay, and live/dead staining. RESULTS NO release rates could be controlled with different Cu concentration in PDAM@Cu coatings. NO generated from the PDAM@Cu coatings effectively induced dispersal of biofilms shown by the reduction in biofilm biomass as well as reduced biofilm attachment in samples prepared with blood and NO donors. Cu ions released from the PDAM@Cu coatings resulted in killing of the dispersed bacteria, which was evidenced by the live/dead cell staining and reduced metabolic activity noted from the XTT assay. In contrast, samples prepared with saliva showed no significant reduction in biofilms, indicating the important effect of endogenously generated NO on biofilm dispersal. CONCLUSION In conclusion, PDAM@Cu coatings with NO generating surfaces have a dual anti-biofilm function, with a synergistic effect on biofilm dispersal from regulated NO generation and bactericidal effects from Cu ions from the coatings.
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da Silva PB, Araújo VHS, Fonseca-Santos B, Solcia MC, Ribeiro CM, da Silva IC, Alves RC, Pironi AM, Silva ACL, Victorelli FD, Fernandes MA, Ferreira PS, da Silva GH, Pavan FR, Chorilli M. Highlights Regarding the Use of Metallic Nanoparticles against Pathogens Considered a Priority by the World Health Organization. Curr Med Chem 2021; 28:1906-1956. [PMID: 32400324 DOI: 10.2174/0929867327666200513080719] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Revised: 02/11/2020] [Accepted: 03/20/2020] [Indexed: 11/22/2022]
Abstract
The indiscriminate use of antibiotics has facilitated the growing resistance of bacteria, and this has become a serious public health problem worldwide. Several microorganisms are still resistant to multiple antibiotics and are particularly dangerous in the hospital and nursing home environment, and to patients whose care requires devices, such as ventilators and intravenous catheters. A list of twelve pathogenic genera, which especially included bacteria that were not affected by different antibiotics, was released by the World Health Organization (WHO) in 2017, and the research and development of new antibiotics against these genera has been considered a priority. The nanotechnology is a tool that offers an effective platform for altering the physicalchemical properties of different materials, thereby enabling the development of several biomedical applications. Owing to their large surface area and high reactivity, metallic particles on the nanometric scale have remarkable physical, chemical, and biological properties. Nanoparticles with sizes between 1 and 100 nm have several applications, mainly as new antimicrobial agents for the control of microorganisms. In the present review, more than 200 reports of various metallic nanoparticles, especially those containing copper, gold, platinum, silver, titanium, and zinc were analyzed with regard to their anti-bacterial activity. However, of these 200 studies, only 42 reported about trials conducted against the resistant bacteria considered a priority by the WHO. All studies are in the initial stage, and none are in the clinical phase of research.
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Affiliation(s)
- Patricia Bento da Silva
- Sao Paulo State University (UNESP), School of Pharmaceutical Sciences, Araraquara-SP, Brazil
| | | | - Bruno Fonseca-Santos
- Sao Paulo State University (UNESP), School of Pharmaceutical Sciences, Araraquara-SP, Brazil
| | - Mariana Cristina Solcia
- Sao Paulo State University (UNESP), School of Pharmaceutical Sciences, Araraquara-SP, Brazil
| | | | | | - Renata Carolina Alves
- Sao Paulo State University (UNESP), School of Pharmaceutical Sciences, Araraquara-SP, Brazil
| | - Andressa Maria Pironi
- Sao Paulo State University (UNESP), School of Pharmaceutical Sciences, Araraquara-SP, Brazil
| | | | | | - Mariza Aires Fernandes
- Sao Paulo State University (UNESP), School of Pharmaceutical Sciences, Araraquara-SP, Brazil
| | - Paula Scanavez Ferreira
- Sao Paulo State University (UNESP), School of Pharmaceutical Sciences, Araraquara-SP, Brazil
| | - Gilmar Hanck da Silva
- Sao Paulo State University (UNESP), School of Pharmaceutical Sciences, Araraquara-SP, Brazil
| | - Fernando Rogério Pavan
- Sao Paulo State University (UNESP), School of Pharmaceutical Sciences, Araraquara-SP, Brazil
| | - Marlus Chorilli
- Sao Paulo State University (UNESP), School of Pharmaceutical Sciences, Araraquara-SP, Brazil
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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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Hao X, Zhu J, Rensing C, Liu Y, Gao S, Chen W, Huang Q, Liu YR. Recent advances in exploring the heavy metal(loid) resistant microbiome. Comput Struct Biotechnol J 2020; 19:94-109. [PMID: 33425244 PMCID: PMC7771044 DOI: 10.1016/j.csbj.2020.12.006] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2020] [Revised: 12/03/2020] [Accepted: 12/05/2020] [Indexed: 12/18/2022] Open
Abstract
Heavy metal(loid)s exert selective pressure on microbial communities and evolution of metal resistance determinants. Despite increasing knowledge concerning the impact of metal pollution on microbial community and ecological function, it is still a challenge to identify a consistent pattern of microbial community composition along gradients of elevated metal(loid)s in natural environments. Further, our current knowledge of the microbial metal resistome at the community level has been lagging behind compared to the state-of-the-art genetic profiling of bacterial metal resistance mechanisms in a pure culture system. This review provides an overview of the core metal resistant microbiome, development of metal resistance strategies, and potential factors driving the diversity and distribution of metal resistance determinants in natural environments. The impacts of biotic factors regulating the bacterial metal resistome are highlighted. We finally discuss the advances in multiple technologies, research challenges, and future directions to better understand the interface of the environmental microbiome with the metal resistome. This review aims to highlight the diversity and wide distribution of heavy metal(loid)s and their corresponding resistance determinants, helping to better understand the resistance strategy at the community level.
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Affiliation(s)
- Xiuli Hao
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China
- College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
- Hubei Key Laboratory of Soil Environment and Pollution Remediation, Huazhong Agricultural University, Wuhan 430070, China
- Corresponding authors at: State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China.
| | - Jiaojiao Zhu
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China
- College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Christopher Rensing
- Institute of Environmental Microbiology, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
| | - Ying Liu
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China
- College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Shenghan Gao
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China
- College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Wenli Chen
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China
| | - Qiaoyun Huang
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China
- College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
- Hubei Key Laboratory of Soil Environment and Pollution Remediation, Huazhong Agricultural University, Wuhan 430070, China
| | - Yu-Rong Liu
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China
- College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
- Hubei Key Laboratory of Soil Environment and Pollution Remediation, Huazhong Agricultural University, Wuhan 430070, China
- Corresponding authors at: State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China.
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Rai R, Gummadi SN, Chand DK. Cuprous Oxide- or Copper-Coated Jute Stick Pieces at an Air-Water Interface for Prevention of Aerial Contamination in Potable Water. ACS OMEGA 2019; 4:22514-22520. [PMID: 31909334 PMCID: PMC6941366 DOI: 10.1021/acsomega.9b03184] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Accepted: 11/29/2019] [Indexed: 06/10/2023]
Abstract
Cuprous oxide and copper have been synthesized via the solvothermal process using basic copper carbonate as the source of copper. Pure Cu2O or Cu could be afforded by simply varying the solvent while keeping the temperature and time constant. In this study, copper-based materials were coated on jute stick pieces (JSP) in situ. Cu2O-coated JSP (Cu2O-JSP) and Cu-coated JSP (Cu-JSP) were characterized by powder X-ray diffraction (PXRD) and scanning electron microscopy (SEM). Cu2O-JSP and Cu-JSP were found to be active against Escherichia coli NCIM 2931 (Gram-negative bacteria) and Staphylococcus aureus (Gram-positive bacteria). The antibacterial nature of the material and the buoyant nature of Cu2O-JSP and Cu-JSP were exploited to develop beaded necklace-like strands that could be floated on potable water to effectively prevent aerial contamination. Leaching of copper from both Cu2O-JSP and Cu-JSP into water was found to be below the permissible limit for copper in drinking water.
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Affiliation(s)
- Randhir Rai
- Department
of Chemistry and Department of Biotechnology, Bhupat and Jyoti
Mehta School of Biosciences, IIT Madras, Chennai 600036, India
| | - Sathyanarayana N. Gummadi
- Department
of Chemistry and Department of Biotechnology, Bhupat and Jyoti
Mehta School of Biosciences, IIT Madras, Chennai 600036, India
| | - Dillip Kumar Chand
- Department
of Chemistry and Department of Biotechnology, Bhupat and Jyoti
Mehta School of Biosciences, IIT Madras, Chennai 600036, India
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Ognik K, Cholewińska E, Juśkiewicz J, Zduńczyk Z, Tutaj K, Szlązak R. The effect of copper nanoparticles and copper (II) salt on redox reactions and epigenetic changes in a rat model. J Anim Physiol Anim Nutr (Berl) 2019; 103:675-686. [PMID: 30618103 DOI: 10.1111/jpn.13025] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2018] [Revised: 09/28/2018] [Accepted: 10/25/2018] [Indexed: 12/26/2022]
Abstract
The aim of the study was to evaluate the effects of a diet containing different levels of Cu in two different chemical forms (carbonate and nanoparticles) on redox reactions and epigenetic changes in a rat model. For 4 weeks, five experimental groups (eight rats in each) were fed diets with two dosages of added Cu (standard-6.5 mg/kg or half of the standard dosage-3.25 mg/kg, and as a negative control no additional Cu in the mineral mixture) in two forms (standard-CuCO3 and copper nanoparticles). Addition of Cu nanoparticles resulted in higher Cp (ceruloplasmin) activity and LOOH (lipid peroxides) and MDA (malondialdehyde) content, as well as decrease the CAT (catalase) activity and level of PC (protein carbonyl), 3-NT (3-nitrotyrosine), 8-OHdG (8-hydroxydeoxyguanosine), GSH + GSSG (total glutathione) and DNA methylation. Reducing the dose of copper resulted in a decrease in the level of LOOH and GSH + GSSG as well as CAT activity, but increased the level of PC and methylated DNA. Based on these evidence, we concluded that addition of copper nanoparticles in the diet reduces protein oxidation and nitration as well as DNA oxidation and methylation. Lowering the level of Cu in the diet increases the oxidation of proteins and DNA methylation.
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Affiliation(s)
- Katarzyna Ognik
- Department of Biochemistry and Toxicology, Faculty of Biology, Animal Sciences and Bioeconomy, University of Life Science in Lublin, Lublin, Poland
| | - Ewelina Cholewińska
- Department of Biochemistry and Toxicology, Faculty of Biology, Animal Sciences and Bioeconomy, University of Life Science in Lublin, Lublin, Poland
| | - Jerzy Juśkiewicz
- Division of Food Science, Institute of Animal Reproduction and Food Research of the Polish Academy of Sciences, Olsztyn, Poland
| | - Zenon Zduńczyk
- Division of Food Science, Institute of Animal Reproduction and Food Research of the Polish Academy of Sciences, Olsztyn, Poland
| | - Krzysztof Tutaj
- Department of Biochemistry and Toxicology, Faculty of Biology, Animal Sciences and Bioeconomy, University of Life Science in Lublin, Lublin, Poland.,Faculty of Medicine, Centre for Innovative Research in Medical and Natural Sciences, University of Rzeszów, Rzeszów, Poland
| | - Radosław Szlązak
- Department of Metrology and Modelling of Agrophysical Processes, Bohdan Dobrzański Institute of Agrophysics of the Polish Academy of Sciences, Lublin, Poland
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9
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Saharudin KA, Sreekantan S, Mydin RBSMN, Aziz SNQAA, Govindasamy GA. Nano TiO2 for Biomedical Applications. NANOTECHNOLOGY: APPLICATIONS IN ENERGY, DRUG AND FOOD 2019:267-281. [DOI: 10.1007/978-3-319-99602-8_13] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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10
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Govindan K, Angelin A, Rangarajan M. Critical evaluation of mechanism responsible for biomass abatement during electrochemical coagulation (EC) process: A critical review. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2018; 227:335-353. [PMID: 30199730 DOI: 10.1016/j.jenvman.2018.08.100] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Revised: 08/15/2018] [Accepted: 08/26/2018] [Indexed: 06/08/2023]
Abstract
This is a first review paper that delineates fundamental disinfection mechanism undergoes during the simple electrochemical coagulation (EC) process. The elucidation of detailed mechanistic phenomenon of EC process involved would help to enhance the disinfection efficiency. In this context, the biomass (bacteria, virus and algae) abatement mechanism by EC is critically reviewed and rationalized based on the experimental demonstration performed from the recent decade. Whereas, the effect of most significant abiotic operating parameters, dissolved contents and bacteria cell wall composition on biomass reduction are explored in detail. From these analyses, physical removal and chemical inactivation routes are identified for bacteria abatement mechanism during the EC process using sacrificial electrodes. Which includes (i) enmeshment of microbial contaminants by EC flocs, (ii) sweeping flocculation is preferentially for destabilization of negatively charged biomass, and (iii) inactivation/attenuation of micro-organism cell walls by electrochemically induced reactive oxygen species (ROS) or direct interaction of electric field. Perhaps, the overall abatement mechanism attributes due to the aforementioned phenomenon endures independently and/or synergistically during the EC process. Nonetheless, to obtain better understanding of virus and algae abatement mechanism, we require more experimental investigation on algae and virus removal. Eventually, more intensive research efforts on biomass attenuation by EC are most important to reinforce this claim.
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Affiliation(s)
- Kadarkarai Govindan
- Center of Excellence in Advanced Materials and Green Technologies, Department of Chemical Engineering and Material Science, Amrita School of Engineering Coimbatore, Amrita Vishwa Vidyapeetham, Amrita University, Coimbatore, Tamil Nadu, 641 112, India.
| | - Arumugam Angelin
- Department of Biotechnology, Karunya Institute of Technology and Sciences, Coimbatore, 641 114, Tamil Nadu, India
| | - Murali Rangarajan
- Center of Excellence in Advanced Materials and Green Technologies, Department of Chemical Engineering and Material Science, Amrita School of Engineering Coimbatore, Amrita Vishwa Vidyapeetham, Amrita University, Coimbatore, Tamil Nadu, 641 112, India
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Kim JB, Kim JK, Kim H, Cho EJ, Park YJ, Lee HK. Inhibitory Effect of Metal Surface on the Antimicrobial Resistance Microorganism. ANNALS OF CLINICAL MICROBIOLOGY 2018. [DOI: 10.5145/acm.2018.21.4.80] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Affiliation(s)
- Jung-Beom Kim
- Department of Food Science and Technology, Sunchon National University, Suncheon, Korea
| | - Jae-Kwang Kim
- Department of Laboratory Medicine, The Catholic University of Korea, Uijeongbu St. Mary's Hospital, Seoul, Korea
| | - Hyunjung Kim
- Department of Laboratory Medicine, The Catholic University of Korea, Uijeongbu St. Mary's Hospital, Seoul, Korea
| | - Eun Jung Cho
- Department of Laboratory Medicine, The Catholic University of Korea, Uijeongbu St. Mary's Hospital, Seoul, Korea
| | - Yeon-Joon Park
- Department of Laboratory Medicine, The Catholic University of Korea, Seoul St. Mary's Hospital, Seoul, Korea
| | - Hae Kyung Lee
- Department of Laboratory Medicine, The Catholic University of Korea, Uijeongbu St. Mary's Hospital, Seoul, Korea
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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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13
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Antimicrobial Properties of Selected Copper Alloys on Staphylococcus aureus and Escherichia coli in Different Simulations of Environmental Conditions: With vs. without Organic Contamination. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2017; 14:ijerph14070813. [PMID: 28726753 PMCID: PMC5551251 DOI: 10.3390/ijerph14070813] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Revised: 07/10/2017] [Accepted: 07/14/2017] [Indexed: 11/23/2022]
Abstract
Background: Hospital equipment made from copper alloys can play an important role in complementing traditional methods of disinfection. Aims of the study: The aim of this study was to assess the dynamics of the antimicrobial properties of selected copper alloys in different simulations of environmental conditions (with organic contamination vs. without organic contamination), and to test alternatives to the currently used testing methods. Materials and Methods: A modification of Japanese standard JIS Z 2801 as well as Staphylococcus aureus (SA) and Escherichia coli (EC) suspended in NaCl vs. tryptic soy broth (TSB) were used in tests performed on seven commonly used copper alloys, copper, and stainless steel. Results: A much faster reduction of the bacterial suspension was observed for the inoculum prepared in NaCl than in TSB. A faster reduction for EC than for SA was observed in the inoculum prepared in NaCl. The opposite results were found for the inoculum based on TSB. A significant correlation between the copper concentration in the copper alloys and the time and degree of bacterial suspension reduction was only observed in the case of EC. Conclusions: This study confirmed the antimicrobial properties of copper alloys, and additionally showed that Staphylococcus aureus was more resistant than Escherichia coli in the variant of the experiment without organic contamination. However, even for SA, a total reduction of the bacterial inoculum’s density took no longer than 2 h. Under conditions simulating organic contamination, all of the tested alloys were shown to have bactericidal or bacteriostatic properties, which was contrary to the results from stainless steel.
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14
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Tripathi A, Melo JS. Development of Nano-Antimicrobial Biomaterials for Biomedical Applications. ADVANCES IN BIOMATERIALS FOR BIOMEDICAL APPLICATIONS 2017; 66. [PMCID: PMC7122509 DOI: 10.1007/978-981-10-3328-5_12] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Around the globe, there is a great concern about controlling growth of pathogenic microorganisms for the prevention of infectious diseases. Moreover, the greater incidences of cross contamination and overuse of drugs has contributed towards the development of drug resistant microbial strains making conditions even worse. Hospital acquired infections pose one of the leading complications associated with implantation of any biomaterial after surgery and critical care. In this regard, developing non-conventional antimicrobial agents which would prevent the aforementioned causes is under the quest. The rapid development in nanoscience and nanotechnology has shown promising potential for developing novel biocidal agents that would integrate with a biomaterial to prevent bacterial colonization and biofilm formation. Metals with inherent antimicrobial properties such as silver, copper, zinc at nano scale constitute a special class of antimicrobials which have broad spectrum antimicrobial nature and pose minimum toxicity to humans. Hence, novel biomaterials that inhibit microbial growth would be of great significance to eliminate medical device/instruments associated infections. This chapter comprises the state-of-art advancements in the development of nano-antimicrobial biomaterials for biomedical applications. Several strategies have been targeted to satisfy few important concern such as enhanced long term antimicrobial activity and stability, minimize leaching of antimicrobial material and promote reuse. The proposed strategies to develop new hybrid antimicrobial biomaterials would offer a potent antibacterial solution in healthcare sector such as wound healing applications, tissue scaffolds, medical implants, surgical devices and instruments.
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Affiliation(s)
- Anuj Tripathi
- Nuclear Agriculture & Biotechnology Div, Bhabha Atomic Research Centre, Mumbai, Maharashtra India
| | - Jose Savio Melo
- Nuclear Agriculture & Biotechnology Div, Bhabha Atomic Research Centre, Mumbai, Maharashtra India
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15
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Inkinen J, Mäkinen R, Keinänen-Toivola MM, Nordström K, Ahonen M. Copper as an antibacterial material in different facilities. Lett Appl Microbiol 2016; 64:19-26. [PMID: 27718259 DOI: 10.1111/lam.12680] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Revised: 08/17/2016] [Accepted: 08/20/2016] [Indexed: 11/26/2022]
Abstract
The present study was performed in real life settings in different facilities (hospital, kindergarten, retirement home, office building) with copper and copper alloy touch surface products (floor drain lids, toilet flush buttons, door handles, light switches, closet touch surfaces, corridor hand rails, front door handles and toilet support rails) in parallel to reference products. Pure copper surfaces supported lower total bacterial counts (16 ± 45 vs 105 ± 430 CFU cm-2 , n = 214, P < 0·001) and a lower occurrence of Staphylococcus aureus (2·6 vs 14%, n = 157, P < 0·01) and Gram-negatives (21 vs 34%, n = 214, P < 0·05) respectively than did reference surfaces, whereas the occurrence of enterococci (15%, n = 214, P > 0·05) was similar. The studied products could be assigned to three categories according to their bacterial loads as follows (P < 0·001): floor drain lids (300 ± 730 CFU cm-2 , n = 32), small area touch surfaces (8·0 ± 7·1 to 62 ± 160 CFU cm-2 , n = 90) and large area touch surfaces (1·1 ± 1·1 to 1·7 ± 2·4 CFU cm-2 , n = 92). In conclusion, copper touch surface products can function as antibacterial materials to reduce the bacterial load, especially on frequently touched small surfaces. SIGNIFICANCE AND IMPACT OF THE STUDY The efficiency of copper as an antimicrobial material has been noted in laboratory studies and in the hospital environment. The present study further shows that copper exerted an antibacterial effect in different facilities, i.e. in a hospital, a kindergarten, an office building and in a retirement home for the elderly. The study suggests that copper has potential use as an antibacterial material and therefore might serve as a means to lower the incidence of transmission of infectious agents from inanimate surfaces in different facilities, with everyday functions.
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Affiliation(s)
- J Inkinen
- Faculty of Technology, WANDER Nordic Water and Materials Institute, Satakunta University of Applied Sciences, Rauma, Finland.,Department of Civil Engineering, School of Engineering, Aalto University, Espoo, Finland
| | - R Mäkinen
- Faculty of Technology, WANDER Nordic Water and Materials Institute, Satakunta University of Applied Sciences, Rauma, Finland
| | - M M Keinänen-Toivola
- Faculty of Technology, WANDER Nordic Water and Materials Institute, Satakunta University of Applied Sciences, Rauma, Finland
| | - K Nordström
- Department of Biotechnology and Chemical Technology, School of Chemical Technology, Aalto University, Espoo, Finland
| | - M Ahonen
- Faculty of Technology, WANDER Nordic Water and Materials Institute, Satakunta University of Applied Sciences, Rauma, Finland
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16
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Sputtered Cu-polyethylene films inducing bacteria inactivation in the dark and under low intensity sunlight. J Photochem Photobiol A Chem 2016. [DOI: 10.1016/j.jphotochem.2016.08.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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17
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Barry DM, McGrath PB. Rotation Disk Process to Assess the Influence of Metals and Voltage on the Growth of Biofilm. MATERIALS 2016; 9:ma9070568. [PMID: 28773689 PMCID: PMC5456865 DOI: 10.3390/ma9070568] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Revised: 07/05/2016] [Accepted: 07/07/2016] [Indexed: 11/16/2022]
Abstract
Biofilms consist of not only bacteria but also extracellular polymer substrates (EPS). They are groups of microorganisms that adhere to each other on a surface, especially as a result of exposure to water and bacteria. They can pose health risks to humans as they grow in hospital settings that include medical supplies and devices. In a previous study, the researchers discovered that bacteria/biofilm grew well on wetted external latex, male catheters. These results concerned the investigators and encouraged them to find ways for prohibiting the growth of bacteria/biofilm on the male catheters (which are made of natural rubber). They carried out a new study to assess the influence of metals and voltage for the growth of bacteria on these latex samples. For this purpose, a unique Rotation Disk Reactor was used to accelerate biofilm formation on external male catheter samples. This setup included a dip tank containing water and a rotating wheel with the attached latex samples (some of which had single electrodes while others had paired electrodes with applied voltage). The process allowed the samples to become wetted and also exposed them to microorganisms in the ambient air during each revolution of the wheel. The results (as viewed from SEM images) showed that when compared to the control sample, the presence of metals (brass, stainless steel, and silver) was generally effective in preventing bacterial growth. Also the use of voltage (9.5 volt battery) essentially eliminated the appearance of rod shaped bacteria in some of the samples. It can be concluded that the presence of metals significantly reduced bacterial growth on latex and the application of voltage was able to essentially eliminate bacteria, providing appropriate electrode combinations were used.
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Affiliation(s)
- Dana M Barry
- Departments of Chemical & Biomolecular Engineering, Clarkson University, Potsdam, NY 13699, USA.
- Department of Electrical and Computer Engineering, Clarkson University, Potsdam, NY 13699, USA.
- Center for Advanced Materials Processing (CAMP), Clarkson University, Potsdam, NY 13699, USA.
| | - Paul B McGrath
- Department of Electrical and Computer Engineering, Clarkson University, Potsdam, NY 13699, USA.
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18
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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: 149] [Impact Index Per Article: 18.6] [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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19
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Rtimi S, Sanjines R, Pulgarin C, Kiwi J. Quasi-Instantaneous Bacterial Inactivation on Cu-Ag Nanoparticulate 3D Catheters in the Dark and Under Light: Mechanism and Dynamics. ACS APPLIED MATERIALS & INTERFACES 2016; 8:47-55. [PMID: 26699928 DOI: 10.1021/acsami.5b09730] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The first evidence for Cu-Ag (50%/50%) nanoparticulate hybrid coatings is presented leading to a complete and almost instantaneous bacterial inactivation in the dark (≤5 min). Dark bacterial inactivation times on Cu-Ag (50%/50%) were observed to coincide with the times required by actinic light irradiation. This provides the evidence that the bimetal Cu-Ag driven inactivation predominates over a CuO/Cu2O and Ag2O oxides inducing a semiconductor driven behavior. Cu- or Ag-coated polyurethane (PU) catheters led to bacterial inactivation needing about ∼30 min. The accelerated bacterial inactivation by Cu-Ag coated on 3D catheters sputtered was investigated in a detailed way. The release of Cu/Ag ions during bacterial inactivation was followed by inductively coupled plasma mass-spectrometry (ICP-MS) and the amount of Cu and Ag-ions released were below the cytotoxicity levels permitted by the sanitary regulations. By stereomicroscopy the amount of live/dead cells were followed during the bacterial inactivation time. By Fourier transform infrared spectroscopy (FTIR), the systematic shift of the -(CH2) band stretching of the outer lipo-polysaccharide bilayer (LPS) was followed to monitor the changes leading to cell lysis. A hydrophobic to hydrophilic transformation of the Cu-Ag PU catheter surface under light was observed within 30 min followed concomitantly to a longer back transformation to the hydrophobic initial state in the dark. Physical insight is provided for the superior performance of Cu-Ag films compared to Cu or Ag films in view of the drastic acceleration of the bacterial inactivation observed on bimetal Cu-Ag films coating PU catheters. A mechanism of bacterial inactivation is suggested that is consistent with the findings reported in this study.
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Affiliation(s)
- Sami Rtimi
- EPFL-SB-ISIC-GPAO, Ecole Polytechnique Fédérale de Lausanne , Station 6, CH-1015 Lausanne, Switzerland
| | - Rosendo Sanjines
- EPFL-SB-IPMC-LNNME, Ecole Polytechnique Fédérale de Lausanne , Station 3, CH-1015 Lausanne, Switzerland
| | - Cesar Pulgarin
- EPFL-SB-ISIC-GPAO, Ecole Polytechnique Fédérale de Lausanne , Station 6, CH-1015 Lausanne, Switzerland
| | - John Kiwi
- EPFL-SB-ISIC-GPAO, Ecole Polytechnique Fédérale de Lausanne , Station 6, CH-1015 Lausanne, Switzerland
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20
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Rohullah R, Azam A, Qiao S, Islam MU, Ali J, Wahab A, Khan MA, Farhan F, Hameed A. Facile synthesis of hair-extract-capped gold and silver nanoparticles and their biological applications. RSC Adv 2016. [DOI: 10.1039/c6ra21455j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Hair is a waste keratinous biomaterial.
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Affiliation(s)
- Rohullah Rohullah
- Department of Chemistry
- Kohat University of Science and Technology
- Pakistan
| | - Andaleeb Azam
- Department of Chemistry
- Women University Swabi
- Swabi
- Pakistan
| | - Shanlin Qiao
- National Center for Nanoscience and Technology
- University of Chinese Academy
- Beijing
- China
| | - Mazhar Ul Islam
- Department of Chemical Engineering
- College of Engineering
- Dhofar University
- Salalah
- Oman
| | - Javed Ali
- Department of Chemistry
- Kohat University of Science and Technology
- Pakistan
| | - Abdul Wahab
- Department of Pharmacy
- Kohat University of Science and Technology
- Pakistan
| | - Murad Ali Khan
- Department of Chemistry
- Kohat University of Science and Technology
- Pakistan
| | - Farhan Farhan
- Department of Chemistry
- Kohat University of Science and Technology
- Pakistan
| | - Abdul Hameed
- National Center for Nanoscience and Technology
- University of Chinese Academy
- Beijing
- China
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21
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Alotaibi AM, Sathasivam S, Nair SP, Parkin IP. Antibacterial properties of Cu–ZrO2thin films prepared via aerosol assisted chemical vapour deposition. J Mater Chem B 2016; 4:666-671. [DOI: 10.1039/c5tb02312b] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The antibacterial properties of a Cu–ZrO2film grownviaaerosol assisted chemical vapour deposition are presented.
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Affiliation(s)
- Abdullah M. Alotaibi
- Materials Chemistry Centre
- Department of Chemistry
- University College London
- London WC1H 0AJ
- UK
| | - Sanjayan Sathasivam
- Materials Chemistry Centre
- Department of Chemistry
- University College London
- London WC1H 0AJ
- UK
| | - Sean P. Nair
- Department of Microbial Diseases
- University College London Eastman Dental Institute
- London
- UK
| | - Ivan P. Parkin
- Materials Chemistry Centre
- Department of Chemistry
- University College London
- London WC1H 0AJ
- UK
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22
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Eser OK, Ergin A, Hascelik G. Antimicrobial Activity of Copper Alloys Against Invasive Multidrug-Resistant Nosocomial Pathogens. Curr Microbiol 2015; 71:291-5. [PMID: 26044991 DOI: 10.1007/s00284-015-0840-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2014] [Accepted: 04/18/2015] [Indexed: 02/04/2023]
Abstract
The emergence and spread of antibiotic resistance demanded novel approaches for the prevention of nosocomial infections, and metallic copper surfaces have been suggested as an alternative for the control of multidrug-resistant (MDR) bacteria in surfaces in the hospital environment. This study aimed to evaluate the antimicrobial activity of copper material for invasive MDR nosocomial pathogens isolated over time, in comparison to stainless steel. Clinical isolates of methicillin-resistant Staphylococcus aureus (MRSA) (n:4), OXA-23 and OXA-58 positive, MDR Acinetobacter baumannii (n:6) and Pseudomonas aeruginosa (n:4) were evaluated. The antimicrobial activity of coupons containing 99 % copper and a brass alloy containing 63 % copper was assessed against stainless steel. All the materials demonstrated statistically significant differences within each other for the logarithmic reduction of microorganisms. Among the three materials, the highest reduction of microorganisms was seen in 99 % copper and the least in stainless steel. The result was statistically significant especially for 0, 2, and 4 h (P = 0.05). 99 % copper showed a bactericidal effect at less than 1 h for MRSA and at 2 h for P. aeruginosa. 63 % copper showed a bactericidal effect at 24 h for P. aeruginosa strains only. Stainless steel surfaces exhibited a bacteriostatic effect after 6 h for P. aeruginosa strains only. 99 % copper reduced the number of bacteria used significantly, produced a bactericidal effect and was more effective than 63 % copper. The use of metallic copper material could aid in reducing the concentration of bacteria, especially for invasive nosocomial pathogens on hard surfaces in the hospital environment.
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Affiliation(s)
- Ozgen Koseoglu Eser
- Department of Medical Microbiology, Faculty of Medicine, Hacettepe University, Ankara, Turkey,
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23
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Gião MS, Wilks SA, Keevil CW. Influence of copper surfaces on biofilm formation by Legionella pneumophila in potable water. Biometals 2015; 28:329-39. [PMID: 25686789 DOI: 10.1007/s10534-015-9835-y] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2015] [Accepted: 02/10/2015] [Indexed: 11/30/2022]
Abstract
Legionella pneumophila is a waterborne pathogen that can cause Legionnaires' disease, a fatal pneumonia, or Pontiac fever, a mild form of disease. Copper is an antimicrobial material used for thousands of years. Its incorporation in several surface materials to control the transmission of pathogens has been gaining importance in the past decade. In this work, the ability of copper to control the survival of L. pneumophila in biofilms was studied. For that, the incorporation of L. pneumophila in polymicrobial drinking water biofilms formed on copper, PVC and PEX, and L. pneumophila mono-species biofilms formed on copper and uPVC were studied by comparing cultivable and total numbers (quantified by peptide nucleic acid (PNA) hybridisation). L. pneumophila was never recovered by culture from heterotrophic biofilms; however, PNA-positive numbers were slightly higher in biofilms formed on copper (5.9 × 10(5) cells cm(-2)) than on PVC (2.8 × 10(5) cells cm(-2)) and PEX (1.7 × 10(5) cells cm(-2)). L. pneumophila mono-species biofilms grown on copper gave 6.9 × 10(5) cells cm(-2) for PNA-positive cells and 4.8 × 10(5) CFU cm(-2) for cultivable numbers, showing that copper is not directly effective in killing L. pneumophila. Therefore previous published studies showing inactivation of L. pneumophila by copper surfaces in potable water polymicrobial species biofilms must be carefully interpreted.
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Affiliation(s)
- M S Gião
- Environmental Healthcare Unit, Centre for Biological Sciences, Life Sciences Building, Highfield Campus, University of Southampton, Southampton, SO17 1BJ, UK,
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24
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Xiong L, Xiao H, Zeng Q, Wang B, Wen S, Li B, Ding Y, Yu H. Direct transformation of metallic copper to copper nanostructures by simple alcohol thermal treatment and their photoactivity. RSC Adv 2015. [DOI: 10.1039/c5ra17965c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Evolution scheme for the morphology of Cu sheets with ATT for different times (left). Inactivation of E. coli by untreated Cu sheet and Cu nanobelts, nanowires and nanoparticles in the dark and under light irradiation (right).
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Affiliation(s)
- Liangbin Xiong
- School of Physics and Electronic-information Engineering
- Hubei Engineering University
- Xiaogan
- China
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education of China
| | - Huaqing Xiao
- School of Physics and Electronic-information Engineering
- Hubei Engineering University
- Xiaogan
- China
| | - Qingdong Zeng
- School of Physics and Electronic-information Engineering
- Hubei Engineering University
- Xiaogan
- China
| | - Boyun Wang
- School of Physics and Electronic-information Engineering
- Hubei Engineering University
- Xiaogan
- China
| | - Sheng Wen
- College of Chemistry and Materials Science
- Hubei Engineering University
- Xiaogan 432000
- China
| | - Bihui Li
- College of Chemistry and Materials Science
- Hubei Engineering University
- Xiaogan 432000
- China
| | - Yaoming Ding
- School of Physics and Electronic-information Engineering
- Hubei Engineering University
- Xiaogan
- China
| | - Huaqing Yu
- School of Physics and Electronic-information Engineering
- Hubei Engineering University
- Xiaogan
- China
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25
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Barrera-Díaz CE, Frontana-Uribe BA, Roa-Morales G, Bilyeu BW. Reduction of pollutants and disinfection of industrial wastewater by an integrated system of copper electrocoagulation and electrochemically generated hydrogen peroxide. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2015; 50:406-413. [PMID: 25723067 DOI: 10.1080/10934529.2015.987547] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The objective of this study was to evaluate the effect of copper electrocoagulation and hydrogen peroxide on COD, color, turbidity, and bacterial activity in a mixed industry wastewater. The integrated system of copper electrocoagulation and hydrogen peroxide is effective at reducing the organic and bacterial content of industrial wastewater. The copper electrocoagulation alone reduces COD by 56% in 30 min at pH 2.8, but the combined system reduces COD by 78%, biochemical oxygen demand (BOD5) by 81%, and color by 97% under the same conditions. Colloidal particles are flocculated effectively, as shown by the reduction of zeta potential and the 84% reduction in turbidity and 99% reduction in total solids. Additionally, the total coliforms, fecal coliforms, and bacteria are all reduced by 99%. The integrated system is effective and practical for the reduction of both organic and bacterial content in industrial wastewater.
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Affiliation(s)
- Carlos E Barrera-Díaz
- a Centro Conjunto de Investigación en Química Sustentable, UAEM-UNAM , Toluca , Estado de México , México
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26
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Monk AB, Kanmukhla V, Trinder K, Borkow G. Potent bactericidal efficacy of copper oxide impregnated non-porous solid surfaces. BMC Microbiol 2014; 14:57. [PMID: 24606672 PMCID: PMC3973859 DOI: 10.1186/1471-2180-14-57] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Accepted: 02/28/2014] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND The role of fomites and the environment in nosocomial infections is becoming widely recognized. In this paper we discuss the use of Cupron copper oxide impregnated non-porous solid surface in the hospital setting and present in vitro testing data via USA Environmental Protection Agency (EPA) approved testing protocols that demonstrate the efficacy of these products to assist in reduction in environmental contamination and potentially nosocomial infections. RESULTS The two countertops tested passed all the acceptance criteria by the EPA (>99.9% kill within 2 hours of exposure) killing a range of bacterial pathogens on the surface of the countertops even after repeated exposure of the countertops to the pathogen, and multiple wet and dry abrasion cycles. CONCLUSIONS Cupron enhanced EOS countertops thus may be an important adjunct to be used in hospital settings to reduce environmental bioburden and potentially nosocomial infections.
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Affiliation(s)
- Alastair B Monk
- Cupron Inc, 800 East Leigh Street, Suite 123, Richmond, VA 23219, USA
| | - Vikram Kanmukhla
- Cupron Inc, 800 East Leigh Street, Suite 123, Richmond, VA 23219, USA
| | | | - Gadi Borkow
- Cupron Inc, 800 East Leigh Street, Suite 123, Richmond, VA 23219, USA
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27
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Sierra M, Sanhueza A, Alcántara R, Sánchez G. Antimicrobial evaluation of copper sulfate (II) on strains of Enterococcus faecalis. In vitro study. JOURNAL OF ORAL RESEARCH 2013. [DOI: 10.17126/joralres.2013.026] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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28
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Varghese S, ElFakhri SO, Sheel DW, Sheel P, Bolton FJE, Foster HA. Antimicrobial activity of novel nanostructured Cu-SiO2 coatings prepared by chemical vapour deposition against hospital related pathogens. AMB Express 2013; 3:53. [PMID: 24007899 PMCID: PMC3846808 DOI: 10.1186/2191-0855-3-53] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2013] [Accepted: 08/28/2013] [Indexed: 02/07/2023] Open
Abstract
There is increasing recognition that the healthcare environment acts as an important reservoir for transmission of healthcare acquired infections (HCAI). One method of reducing environmental contamination would be use of antimicrobial materials. The antimicrobial activity of thin silica-copper films prepared by chemical vapour deposition was evaluated against standard strains of bacteria used for disinfectant testing and bacteria of current interest in HCAI. The structure of the coatings was determined using Scanning Electron Microscopy and their hardness and adhesion to the substrate determined. Antimicrobial activity was tested using a method based on BS ISO 22196:2007. The coatings had a pale green-brown colour and had a similar hardness to steel. SEM showed nano-structured aggregates of Cu within a silica matrix. A log10 reduction in viability of >5 could be obtained within 4 h for the disinfectant test strains and within 6 h for producing Acinetobacter baumannii, Klebsiella pneumoniae and Stenotrophomonas maltophilia. Activity against the other hospital isolates was slower but still gave log10 reduction factors of >5 for extended spectrum β-lactamase producing Escherichia coli and >3 for vancomycin resistant Enterococcus faecium, methicillin resistant Staphylococcus aureus and Pseudomonas aeruginosa within 24 h. The results demonstrate the importance of testing antimicrobial materials destined for healthcare use against isolates of current interest in hospitals as well as standard test strains. The coatings used here can also be applied to substrates such as metals and ceramics and have potential applications where reduction of microbial environmental contamination is desirable.
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29
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Schneider PM. New technologies and trends in sterilization and disinfection. Am J Infect Control 2013; 41:S81-6. [PMID: 23622756 DOI: 10.1016/j.ajic.2012.12.007] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2012] [Revised: 11/14/2012] [Accepted: 12/04/2012] [Indexed: 11/18/2022]
Abstract
Continued improvements in low-temperature sterilization systems have resulted in reduced processing times and expanded capabilities for instrument reprocessing. As the relationship of environmental surface contamination and health care-associated infections has become more defined, area disinfection systems and antimicrobial surface technologies have emerged as new strategies for disinfection of surfaces.
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Klein TY, Wehling J, Treccani L, Rezwan K. Effective bacterial inactivation and removal of copper by porous ceramics with high surface area. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2013; 47:1065-1072. [PMID: 23273049 DOI: 10.1021/es3045828] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
In this study, we present porous ceramics combining the antibacterial effect of copper with an integrated copper removal adsorbent. After preparing and characterizing the antibacterial copper-doped microbeads and monoliths (CuBs and CuMs), their antibacterial efficiency is probed against different nonpathogenic and pathogenic bacteria (Bacillus subtilis, Escherichia coli, Staphylococcus aureus, and Pseudomonas aeruginosa). An antibacterial efficiency of 100% is reached within 15 min to 3 h for all tested strains under static conditions. Dynamic tests with B. subtilis and E. coli showed high antibacterial efficiency up to 99.93% even at continuous flux. To avoid any adverse effects on the environment, continuous removal of released copper-ions is accomplished with porous, high surface area monolithic adsorbents (MAds). MAds are prepared similarly to the CuMs but without adding copper during the manufacturing process. MAds reduce the amount of copper released from the CuMs ≥ 99% during the first 15 min, ≥90% up to 2 h, and after 22 h of continuous filtration up to 56% of the released copper is removed.
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31
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Møretrø T, Langsrud S. Effects of materials containing antimicrobial compounds on food hygiene. J Food Prot 2011; 74:1200-11. [PMID: 21740725 DOI: 10.4315/0362-028x.jfp-11-042] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Surfaces with microorganisms may transfer unwanted microorganisms to food through cross-contamination during processing and preparation. A high hygienic status of surfaces that come in contact with food is important in order to reduce the risk of cross-contamination. During the last decade, products containing antimicrobial compounds, such as cutting boards, knives, countertops, kitchen utensils, refrigerators, and conveyor belts, have been introduced to the market, claiming hygienic effects. Such products are often referred to as "treated articles." Here we review various aspects related to treated articles intended for use during preparation and processing of food. Regulatory issues and methods to assess antibacterial effects are covered. Different concepts for treated articles as well as their antibacterial activity are reviewed. The effects of products with antimicrobials on food hygiene and safety are discussed.
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Selection of fecal enterococci exhibiting tcrB-mediated copper resistance in pigs fed diets supplemented with copper. Appl Environ Microbiol 2011; 77:5597-603. [PMID: 21705534 DOI: 10.1128/aem.00364-11] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Copper, as copper sulfate, is increasingly used as an alternative to in-feed antibiotics for growth promotion in weaned piglets. Acquired copper resistance, conferred by a plasmid-borne, transferable copper resistance (tcrB) gene, has been reported in Enterococcus faecium and E. faecalis. A longitudinal field study was undertaken to determine the relationship between copper supplementation and the prevalence of tcrB-positive enterococci in piglets. The study was done with weaned piglets, housed in 10 pens with 6 piglets per pen, fed diets supplemented with a normal (16.5 ppm; control) or an elevated (125 ppm) level of copper. Fecal samples were randomly collected from three piglets per pen on days 0, 14, 28, and 42 and plated on M-Enterococcus agar, and three enterococcal isolates were obtained from each sample. The overall prevalence of tcrB-positive enterococci was 21.1% (38/180) in piglets fed elevated copper and 2.8% (5/180) in the control. Among the 43 tcrB-positive isolates, 35 were E. faecium and 8 were E. faecalis. The mean MICs of copper for tcrB-negative and tcrB-positive enterococci were 6.2 and 22.2 mM, respectively. The restriction digestion of the genomic DNA of E. faecium or E. faecalis with S1 nuclease yielded a band of ∼194-kbp size to which both tcrB and the erm(B) gene probes hybridized. A conjugation assay demonstrated cotransfer of tcrB and erm(B) genes between E. faecium and E. faecalis strains. The higher prevalence of tcrB-positive enterococci in piglets fed elevated copper compared to that in piglets fed normal copper suggests that supplementation of copper in swine diets selected for resistance.
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Amachawadi RG, Shelton NW, Jacob ME, Shi X, Narayanan SK, Zurek L, Dritz SS, Nelssen JL, Tokach MD, Nagaraja T. Occurrence oftcrB, a Transferable Copper Resistance Gene, in Fecal Enterococci of Swine. Foodborne Pathog Dis 2010; 7:1089-97. [DOI: 10.1089/fpd.2010.0540] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
| | - Nick W. Shelton
- Department of Animal Sciences and Industry, Kansas State University, Manhattan, Kansas
| | - Megan E. Jacob
- Department of Diagnostic Medicine/Pathobiology, Kansas State University, Manhattan, Kansas
| | - Xiaorong Shi
- Department of Diagnostic Medicine/Pathobiology, Kansas State University, Manhattan, Kansas
| | - Sanjeev K. Narayanan
- Department of Diagnostic Medicine/Pathobiology, Kansas State University, Manhattan, Kansas
| | - Ludek Zurek
- Department of Diagnostic Medicine/Pathobiology, Kansas State University, Manhattan, Kansas
| | - Steve S. Dritz
- Department of Animal Sciences and Industry, Kansas State University, Manhattan, Kansas
| | - Jim L. Nelssen
- Department of Animal Sciences and Industry, Kansas State University, Manhattan, Kansas
| | - Mike D. Tokach
- Department of Animal Sciences and Industry, Kansas State University, Manhattan, Kansas
| | - T.G. Nagaraja
- Department of Diagnostic Medicine/Pathobiology, Kansas State University, Manhattan, Kansas
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