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Gupta AR, Rank M, Singh A, Sharma S. Design and Fabrication of Broad-Spectrum Antimicrobial Porous Metallo-Polymeric Microsphere for Water Disinfection. Macromol Biosci 2024; 24:e2400004. [PMID: 38520297 DOI: 10.1002/mabi.202400004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Revised: 03/19/2024] [Indexed: 03/25/2024]
Abstract
An expedient and efficient approach is used to synthesize a new class of metallo-polymeric microspheres (MPMs) as antimicrobials to succumb the wide range of bacteria from water. Three types of MPMs, that is, poly[Silver (I)-methacrylate-co-methylmethacrylate] (pAgMA), poly[Copper (II)-methacrylate-co-methyl methacrylate] (pCuMA), and poly[Nickel (II)-methacrylate-co-methylmethacrylate] (pNiMA), are prepared via radical suspension polymerization technique in 3D shape with porous texture. The structural and morphological characterization of the prepared microspheres are examined by analytical techniques. The antimicrobial potentialities of prepared MPMs are investigated at the laboratory scale study, revealing that the MPMs exhibit strong antibacterial activity (≈99.9% killing) against Gram-negative and Gram-positive bacteria [Enterobacter hormaechei (EH), Bacillus megatarium (BM), and Bacillus bataviensis (BB)]. The MacConkey agar medium test reveals that MPMs have substantial biocidal efficacy against broad-spectrum Gram-negative bacteria present in tap water. The MPMs exhibit significant antimicrobial efficacy via contact killing owe to the presence of integrated biocidal metal moiety, which represents that the MPMs are safe for water disinfection.
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Affiliation(s)
- Anil R Gupta
- Membrane Science & Separation Technology Division, CSIR-Central Salt & Marine Chemicals Research Institute, G. B. Marg, Bhavnagar, Gujarat, 364002, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Monika Rank
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
- Applied Phycology and Biotechnology Division, CSIR-Central Salt & Marine Chemicals Research Institute, G. B. Marg, Bhavnagar, Gujarat, 364002, India
| | - Aneesha Singh
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
- Applied Phycology and Biotechnology Division, CSIR-Central Salt & Marine Chemicals Research Institute, G. B. Marg, Bhavnagar, Gujarat, 364002, India
| | - Saroj Sharma
- Membrane Science & Separation Technology Division, CSIR-Central Salt & Marine Chemicals Research Institute, G. B. Marg, Bhavnagar, Gujarat, 364002, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
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Hassan SS, Aly SA, Al-Sulami AI, Albohy SAH, Salem MF, Nasr GM, Abdalla EM. Synthesis, characterization, PXRD studies, and theoretical calculation of the effect of gamma irradiation and antimicrobial studies on novel Pd(II), Cu(II), and Cu(I) complexes. Front Chem 2024; 12:1357330. [PMID: 38410818 PMCID: PMC10894937 DOI: 10.3389/fchem.2024.1357330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2023] [Accepted: 01/22/2024] [Indexed: 02/28/2024] Open
Abstract
The main objective of this study is to synthesize and characterize of a new three complexes of Pd (II), Cu (II), and Cu (I) metal ions with novel ligand ((Z)-2-(phenylamino)-N'-(thiophen-2-ylmethylene)acetohydrazide) H2LB. The structural composition of new compounds was assessed using several analytical techniques including FT-IR, 1H-NMR, electronic spectra, powder X-ray diffraction, and thermal behavior analysis. The Gaussian09 program employed the Density Functional Theory (DFT) approach to optimize the geometry of all synthesized compounds, therefore obtaining the most favorable structures and crucial parameters. An investigation was conducted to examine the impact of γ-irradiation on ligands and complexes. Before and after γ-irradiation, the antimicrobial efficiency was investigated for the activity of ligands and their chelates. The Cu(I) complex demonstrated enhanced antibacterial activity after irradiation, as well as other standard medications such as ampicillin and gentamicin. Similarly, the Cu(I) complex exhibited superior activity against antifungal species relative to the standard drug Nystatin. The docking investigation utilized the target location of the topoisomerase enzyme (2xct) chain A.
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Affiliation(s)
- Safaa S. Hassan
- Chemistry Department, Faculty of Science, Cairo University, Giza, Egypt
| | - Samar A. Aly
- Department of Environmental Biotechnology, Genetic Engineering and Biotechnology Research Institute, University of Sadat City, Sadat, Egypt
| | - Ahlam I. Al-Sulami
- Department of Chemistry, College of Science, University of Jeddah, Jeddah, Saudi Arabia
| | - Salwa A. H. Albohy
- Chemistry Department, Faculty of Science (Girls), Al-Azhar University, Nasr, Cairo, Egypt
| | - Mohamed F. Salem
- Department of Environmental Biotechnology, Genetic Engineering and Biotechnology Research Institute, University of Sadat City, Sadat, Egypt
| | - Ghada M. Nasr
- Department of Molecular Diagnostics and Therapeutics, Genetic Engineering and Biotechnology Research Institute, University of Sadat City, Sadat, Egypt
| | - Ehab M. Abdalla
- Chemistry Department, Faculty of Science, New Valley University, El-Kharga, Egypt
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Fiore C, Lekhan A, Bordignon S, Chierotti MR, Gobetto R, Grepioni F, Turner RJ, Braga D. Mechanochemical Preparation, Solid-State Characterization, and Antimicrobial Performance of Copper and Silver Nitrate Coordination Polymers with L- and DL-Arginine and Histidine. Int J Mol Sci 2023; 24:ijms24065180. [PMID: 36982258 PMCID: PMC10049651 DOI: 10.3390/ijms24065180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 02/15/2023] [Accepted: 03/01/2023] [Indexed: 03/11/2023] Open
Abstract
The antimicrobial activity of the novel coordination polymers obtained by co-crystallizing the amino acids arginine or histidine, as both enantiopure L and racemic DL forms, with the salts Cu(NO3)2 and AgNO3 has been investigated to explore the effect of chirality in the cases of enantiopure and racemic forms. The compounds [Cu·AA·(NO3)2]CPs and [Ag·AA·NO3]CPs (AA = L-Arg, DL-Arg, L-His, DL-His) were prepared by mechanochemical, slurry, and solution methods and characterized by X-ray single-crystal and powder diffraction in the cases of the copper coordination polymers, and by powder diffraction and by solid-state NMR spectroscopy in the cases of the silver compounds. The two pairs of coordination polymers, [Cu·L-Arg·(NO3)2·H2O]CP and [Cu·DL-Arg·(NO3)2·H2O]CP, and [Cu·L-Hys·(NO3)2·H2O]CP and [Cu·DL-His·(NO3)2·H2O]CP, have been shown to be isostructural in spite of the different chirality of the amino acid ligands. A similar structural analogy could be established for the silver complexes on the basis of SSNMR. The activity against the bacterial pathogens Pseudomonas aeruginosa, Escherichia coli, and Staphylococcus aureus was assessed by carrying out disk diffusion assays on lysogeny agar media showing that, while there is no significant effect arising from the use of enantiopure or chiral amino acids, the coordination polymers exert an appreciable antimicrobial activity comparable, when not superior, to that of the metal salts alone.
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Affiliation(s)
- Cecilia Fiore
- Dipartimento di Chimica “Giacomo Ciamician”, University of Bologna, Via Selmi, 2, 40126 Bologna, Italy
| | - Andrii Lekhan
- Department of Biological Sciences, University of Calgary, 2500 University Drive NW, Calgary, AB T2N 1N4, Canada
| | - Simone Bordignon
- Dipartimento di Chimica and NIS Centre, University of Torino, Via P. Giuria, 7, 10125 Torino, Italy
| | - Michele R. Chierotti
- Dipartimento di Chimica and NIS Centre, University of Torino, Via P. Giuria, 7, 10125 Torino, Italy
| | - Roberto Gobetto
- Dipartimento di Chimica and NIS Centre, University of Torino, Via P. Giuria, 7, 10125 Torino, Italy
| | - Fabrizia Grepioni
- Dipartimento di Chimica “Giacomo Ciamician”, University of Bologna, Via Selmi, 2, 40126 Bologna, Italy
| | - Raymond J. Turner
- Department of Biological Sciences, University of Calgary, 2500 University Drive NW, Calgary, AB T2N 1N4, Canada
- Correspondence: (R.J.T.); (D.B.)
| | - Dario Braga
- Dipartimento di Chimica “Giacomo Ciamician”, University of Bologna, Via Selmi, 2, 40126 Bologna, Italy
- Correspondence: (R.J.T.); (D.B.)
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Lazou M, Hatzidimitriou AG, Papadopoulos AN, Psomas G. Transition metal(II) complexes with the non–steroidal anti–inflammatory drug oxaprozin: Characterization and biological profile. J Inorg Biochem 2023; 243:112196. [PMID: 36966675 DOI: 10.1016/j.jinorgbio.2023.112196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 03/02/2023] [Accepted: 03/16/2023] [Indexed: 03/19/2023]
Abstract
A series of copper(II), nickel(II) and cobalt(II) complexes with the non-steroidal anti-inflammatory drug oxaprozin (Hoxa) have been synthesized and characterized by diverse techniques. The crystal structures of two copper(II) complexes, namely the dinuclear complex [Cu2(oxa)4(DMF)2] (1) and the polymeric complex {[Cu2(oxa)4]·2MeOH·0.5MeOH}2 (12) were determined by single-crystal X-ray diffraction studies. In order to evaluate in vitro the antioxidant activity of the resultant complexes, their scavenging ability towards 1,1-diphenyl-picrylhydrazyl (DPPH), hydroxyl and 2,2'-azinobis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) radicals was investigated revealing their high effectiveness against these radicals. The binding of the complexes to bovine serum albumin and human serum albumin was examined and the corresponding determined albumin-binding constants showed a tight and reversible interaction. The interaction of the complexes with calf-thymus DNA was monitored by diverse techniques including UV-vis spectroscopy, cyclic voltammetry, DNA-viscosity measurements and competitive studies with ethidium bromide. Intercalation may be proposed as the most possible DNA-interaction mode of the complexes.
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Christidou A, Zavalani K, Hatzidimitriou AG, Psomas G. Copper(II) complexes with 3,5-dihalogeno-salicylaldehydes: Synthesis, structure and interaction with DNA and albumins. J Inorg Biochem 2023; 238:112049. [PMID: 36327500 DOI: 10.1016/j.jinorgbio.2022.112049] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 10/12/2022] [Accepted: 10/21/2022] [Indexed: 11/21/2022]
Abstract
Eight copper(II) complexes of 3,5-dichloro-salicyladehyde or 3,5-dibromo-salicyladehyde (3,5-diX-saloH, X = Br or Cl) were synthesized in the absence or presence of a N,N'-donor co-ligand such as 2,2'-bipyridylamine, 1,10-phenanthroline, or 2,2'-bipyridine. The resultant compounds were formulated as [Cu(3,5-diX-salo)2(MeOH)2] (1-2) and [Cu(3,5-diX-salo)(N,N'-donor)Cl] (3-8) and were characterized by diverse techniques. The crystal structures of three complexes were determined by single-crystal X-ray crystallography. Diverse techniques were employed in order to investigate the interaction of the complexes with calf-thymus DNA which showed intercalation as the most possible mode of their interaction. The affinity of the complexes for bovine serum albumin and human serum albumin was evaluated by fluorescence emission spectroscopy in order to calculate the binding constants which suggested a tight and reversible binding. SYNOPSIS: A series of copper(II) complexes with 3,5-dihalogen-substituted salicylaldehydes as ligands were isolated and characterized. In vitro biological studies showed the intercalation of the compounds with calf-thymus DNA and their tight and reversible binding with serum albumins.
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Affiliation(s)
- Aphrodite Christidou
- Laboratory of Inorganic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, GR 54124 Thessaloniki, Greece
| | - Konstantina Zavalani
- Laboratory of Inorganic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, GR 54124 Thessaloniki, Greece
| | - Antonios G Hatzidimitriou
- Laboratory of Inorganic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, GR 54124 Thessaloniki, Greece
| | - George Psomas
- Laboratory of Inorganic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, GR 54124 Thessaloniki, Greece.
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Ma X, Zhou S, Xu X, Du Q. Copper-containing nanoparticles: Mechanism of antimicrobial effect and application in dentistry-a narrative review. Front Surg 2022; 9:905892. [PMID: 35990090 PMCID: PMC9388913 DOI: 10.3389/fsurg.2022.905892] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Accepted: 07/19/2022] [Indexed: 11/18/2022] Open
Abstract
Copper has been used as an antimicrobial agent long time ago. Nowadays, copper-containing nanoparticles (NPs) with antimicrobial properties have been widely used in all aspects of our daily life. Copper-containing NPs may also be incorporated or coated on the surface of dental materials to inhibit oral pathogenic microorganisms. This review aims to detail copper-containing NPs' antimicrobial mechanism, cytotoxic effect and their application in dentistry.
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Affiliation(s)
- Xinru Ma
- Department of Stomatology, Sichuan Provincial People’s Hospital, University of Electronic Science and Technology of China, Chengdu, China
- Department of Stomatology, Hospital of Chengdu Office of People's Government of Tibetan Autonomous Region (West China Hospital Sichuan University Tibet Chengdu Branch Hospital), Chengdu, China
| | - Shiyu Zhou
- Department of Stomatology, Sichuan Provincial People’s Hospital, University of Electronic Science and Technology of China, Chengdu, China
| | - Xiaoling Xu
- School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, China
| | - Qin Du
- Department of Stomatology, Sichuan Provincial People’s Hospital, University of Electronic Science and Technology of China, Chengdu, China
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7
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Borthakur A, Chhour KL, Gayle HL, Prehn SR, Stenstrom MK, Mohanty SK. Natural aging of expanded shale, clay, and slate (ESCS) amendment with heavy metals in stormwater increases its antibacterial properties: Implications on biofilter design. JOURNAL OF HAZARDOUS MATERIALS 2022; 429:128309. [PMID: 35077973 DOI: 10.1016/j.jhazmat.2022.128309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 01/15/2022] [Accepted: 01/17/2022] [Indexed: 06/14/2023]
Abstract
Aging is often expected to decrease the pathogen removal capacity of media because of exhaustion of attachment sites by adsorption of co-contaminants and dissolved organics. In contrast, the adsorption of metals naturally present in stormwater during aging could have a positive impact on pathogen removal. To examine the effect of adsorbed metals on pathogen removal, biofilter media amended with expanded clay, shale, and slate (ESCS) aggregates, a lightweight aggregate, were exposed to metals by intermittently injecting natural stormwater spiked with Cu, Pb, and Zn, and the capacity of aged and unaged media to remove Escherichia coli (E. coli), a pathogen indicator, were compared. Metal adsorption on ESCS media decreased their net negative surface charge and altered the surface properties as confirmed by zeta potential measurement and Fourier-Transform Infrared Spectroscopy (FTIR) analysis. These changes increased the E. coli adsorption capacity of aged media compared with unaged media and decreased overall remobilization of attached E. coli during intermittent infiltration of stormwater. A live-dead analysis confirmed that the adsorbed metals inactivated attached E. coli, thereby replenishing the adsorption capacity. Overall, the results confirmed that natural aging of biofilter media with adsorbed metals could indeed have a net positive effect on E. coli removal in biofilters and therefore should be included in the conceptual model predicting long-term removal of pathogens from stormwater containing mixed pollutants.
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Affiliation(s)
- Annesh Borthakur
- Department of Civil and Environmental Engineering, University of California, Los Angeles, CA, USA.
| | - Kristida L Chhour
- Department of Civil and Environmental Engineering, University of California, Los Angeles, CA, USA
| | - Hannah L Gayle
- Department of Civil Engineering, California State University, Long Beach, CA, USA
| | - Samantha R Prehn
- Department of Chemistry and Biochemistry, University of California, Los Angeles, CA, USA
| | - Michael K Stenstrom
- Department of Civil and Environmental Engineering, University of California, Los Angeles, CA, USA
| | - Sanjay K Mohanty
- Department of Civil and Environmental Engineering, University of California, Los Angeles, CA, USA.
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Liu LT, Chin AWH, Yu P, Poon LLM, Huang MX. Anti-pathogen stainless steel combating COVID-19. CHEMICAL ENGINEERING JOURNAL (LAUSANNE, SWITZERLAND : 1996) 2022; 433:133783. [PMID: 34853550 PMCID: PMC8613009 DOI: 10.1016/j.cej.2021.133783] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 10/05/2021] [Accepted: 11/19/2021] [Indexed: 05/05/2023]
Abstract
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) exhibits strong stability on conventional stainless steel (SS) surface, with infectious virus detected even after two days, posing a high risk of virus transmission via surface touching in public areas. In order to mitigate the surface toughing transmission, the present study develops the first SS with excellent anti-pathogen properties against SARS-COV-2. The stabilities of SARS-CoV-2, H1N1 influenza A virus (H1N1), and Escherichia coli (E.coli) on the surfaces of Cu-contained SS, pure Cu, Ag-contained SS, and pure Ag were investigated. It is discovered that pure Ag and Ag-contained SS surfaces do not display apparent inhibitory effects on SARS-CoV-2 and H1N1. In comparison, both pure Cu and Cu-contained SS with a high Cu content exhibit significant antiviral properties. Significantly, the developed anti-pathogen SS with 20 wt% Cu can distinctly reduce 99.75% and 99.99% of viable SARS-CoV-2 on its surface within 3 and 6 h, respectively. In addition, the present anti-pathogen SS also exhibits an excellent inactivation ability for H1N1 influenza A virus (H1N1), and Escherichia coli (E.coli). Interestingly, the Cu ion concentration released from the anti-pathogen SS with 10 wt% and 20 wt% Cu was notably higher than the Ag ion concentration released from Ag and the Ag-contained SS. Lift buttons made of the present anti-pathogen SS are produced using mature powder metallurgy technique, demonstrating its potential applications in public areas and fighting the transmission of SARS-CoV-2 and other pathogens via surface touching.
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Affiliation(s)
- L T Liu
- Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, PR China
- Department of Materials Science and Engineering, Southern University of Science and Technology, 1088 Xueyuan Avenue, Shenzhen 518000, PR China
| | - A W H Chin
- School of Public Health, LKS Faculty of Medicine, The University of Hong Kong, 21 Sassoon Road, Hong Kong, PR China
- Centre for Immunity and Infection, Hong Kong Science Park, Hong Kong, PR China
| | - P Yu
- Department of Materials Science and Engineering, Southern University of Science and Technology, 1088 Xueyuan Avenue, Shenzhen 518000, PR China
| | - L L M Poon
- School of Public Health, LKS Faculty of Medicine, The University of Hong Kong, 21 Sassoon Road, Hong Kong, PR China
- Centre for Immunity and Infection, Hong Kong Science Park, Hong Kong, PR China
- HKU-Pasteur Research Pole, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong, PR China
| | - M X Huang
- Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, PR China
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Malis G, Geromichalou E, Geromichalos GD, Hatzidimitriou AG, Psomas G. Copper(II) complexes with non-steroidal anti-inflammatory drugs: Structural characterization, in vitro and in silico biological profile. J Inorg Biochem 2021; 224:111563. [PMID: 34399232 DOI: 10.1016/j.jinorgbio.2021.111563] [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] [Received: 06/15/2021] [Revised: 07/11/2021] [Accepted: 07/30/2021] [Indexed: 01/25/2023]
Abstract
Six novel copper(II) complexes with the non-steroidal anti-inflammatory drugs ibuprofen, loxoprofen, fenoprofen and clonixin as ligands were synthesized and characterized by diverse techniques including single-crystal X-ray crystallography. The in vitro scavenging activity of the complexes against 1,1-diphenyl-picrylhydrazyl and 2,2'-azinobis(3-ethylbenzothiazoline-6-sulfonic acid) free radicals and the ability to reduce H2O2 were studied in the context of the antioxidant activity studies. The complexes may interact with calf-thymus DNA via intercalation as revealed by the techniques employed. The affinity of the complexes for bovine and human serum albumins was evaluated by fluorescence emission spectroscopy and the corresponding binding constants were determined. Molecular docking simulations on the crystal structure of calf-thymus DNA, human and bovine serum albumins were also employed in order to study in silico the ability of the studied compounds to bind to these target biomacromolecules, in terms of impairment of DNA and transportation through serum albumins, to explain the observed in vitro activity and to establish a possible mechanism of action.
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Affiliation(s)
- Georgios Malis
- Department of General and Inorganic Chemistry, Faculty of Chemistry, Aristotle University of Thessaloniki, GR -54124 Thessaloniki, Greece
| | - Elena Geromichalou
- Laboratory of Pharmacology, Medical School, National and Kapodistrian University of Athens, 75 Mikras Asias Street, Athens 11527, Greece
| | - George D Geromichalos
- Department of General and Inorganic Chemistry, Faculty of Chemistry, Aristotle University of Thessaloniki, GR -54124 Thessaloniki, Greece
| | - Antonios G Hatzidimitriou
- Department of General and Inorganic Chemistry, Faculty of Chemistry, Aristotle University of Thessaloniki, GR -54124 Thessaloniki, Greece
| | - George Psomas
- Department of General and Inorganic Chemistry, Faculty of Chemistry, Aristotle University of Thessaloniki, GR -54124 Thessaloniki, Greece.
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Salah I, Parkin IP, Allan E. Copper as an antimicrobial agent: recent advances. RSC Adv 2021; 11:18179-18186. [PMID: 35480904 PMCID: PMC9033467 DOI: 10.1039/d1ra02149d] [Citation(s) in RCA: 75] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Accepted: 05/11/2021] [Indexed: 12/13/2022] Open
Abstract
From its uses in ancient civilisations, copper has an established history as an antimicrobial agent. Extensive research has determined the efficacy and mechanism of copper's antimicrobial activity against microorganisms. The process is multifaceted with the main mechanism of bactericidal activity being the generation of reactive oxygen species (ROS), which irreversibly damages membranes. Copper ions released from surfaces lead to RNA degradation and membrane disruption of enveloped viruses. For fungi, the mechanism involves the physical deterioration of the membrane and copper ion influx. Due to variations in the experimental parameters, it is difficult to compare studies directly. In this review article, we outline the importance of the experimental conditions currently employed and how they bear little resemblance to real-world conditions. We endorse previous recommendations calling for an update to industrial standard tests. The causes of death for each microorganism by CuNPs and metallic copper is summarised.![]()
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Affiliation(s)
- Intisar Salah
- Materials Chemistry Research Centre, Department of Chemistry, University College London 20 Gordon Street London UK
| | - Ivan P Parkin
- Materials Chemistry Research Centre, Department of Chemistry, University College London 20 Gordon Street London UK
| | - Elaine Allan
- Department of Microbial Diseases, Eastman Dental Institute, University College London Royal Free Campus, Rowland Hill Street London UK
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Singh NK, Kumbhar AA, Pokharel YR, Yadav PN. Anticancer potency of copper(II) complexes of thiosemicarbazones. J Inorg Biochem 2020; 210:111134. [DOI: 10.1016/j.jinorgbio.2020.111134] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Revised: 05/31/2020] [Accepted: 06/06/2020] [Indexed: 12/20/2022]
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Maertens L, Coninx I, Claesen J, Leys N, Matroule JY, Van Houdt R. Copper Resistance Mediates Long-Term Survival of Cupriavidus metallidurans in Wet Contact With Metallic Copper. Front Microbiol 2020; 11:1208. [PMID: 32582116 PMCID: PMC7284064 DOI: 10.3389/fmicb.2020.01208] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Accepted: 05/12/2020] [Indexed: 11/13/2022] Open
Abstract
Metallic copper to combat bacterial proliferation in drinking water systems is being investigated as an attractive alternative to existing strategies. A potential obstacle to this approach is the induction of metal resistance mechanisms in contaminating bacteria, that could severely impact inactivation efficacy. Thus far, the role of these resistance mechanisms has not been studied in conditions relevant to drinking water systems. Therefore, we evaluated the inactivation kinetics of Cupriavidus metallidurans CH34 in contact with metallic copper in drinking water. Viability and membrane permeability were examined for 9 days through viable counts and flow cytometry. After an initial drop in viable count, a significant recovery was observed starting after 48 h. This behavior could be explained by either a recovery from an injured/viable-but-non-culturable state or regrowth of surviving cells metabolizing lysed cells. Either hypothesis would necessitate an induction of copper resistance mechanisms, since no recovery was seen in a CH34 mutant strain lacking metal resistance mechanisms, while being more pronounced when copper resistance mechanisms were pre-induced. Interestingly, no biofilms were formed on the copper surface, while extensive biofilm formation was observed on the stainless steel control plates. When CH34 cells in water were supplied with CuSO4, a similar initial decrease in viable counts was observed, but cells recovered fully after 7 days. In conclusion, we have shown that long-term bacterial survival in the presence of a copper surface is possible upon the induction of metal resistance mechanisms. This observation may have important consequences in the context of the increasing use of copper as an antimicrobial surface, especially in light of potential co-selection for metal and antimicrobial resistance.
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Affiliation(s)
- Laurens Maertens
- Microbiology Unit, Interdisciplinary Biosciences, Belgian Nuclear Research Centre (SCK CEN), Mol, Belgium
- Research Unit in Microorganisms Biology (URBM), Narilis Institute, University of Namur, Namur, Belgium
| | - Ilse Coninx
- Microbiology Unit, Interdisciplinary Biosciences, Belgian Nuclear Research Centre (SCK CEN), Mol, Belgium
| | - Jürgen Claesen
- Microbiology Unit, Interdisciplinary Biosciences, Belgian Nuclear Research Centre (SCK CEN), Mol, Belgium
| | - Natalie Leys
- Microbiology Unit, Interdisciplinary Biosciences, Belgian Nuclear Research Centre (SCK CEN), Mol, Belgium
| | - Jean-Yves Matroule
- Research Unit in Microorganisms Biology (URBM), Narilis Institute, University of Namur, Namur, Belgium
| | - Rob Van Houdt
- Microbiology Unit, Interdisciplinary Biosciences, Belgian Nuclear Research Centre (SCK CEN), Mol, Belgium
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Psomas G. Copper(II) and zinc(II) coordination compounds of non-steroidal anti-inflammatory drugs: Structural features and antioxidant activity. Coord Chem Rev 2020. [DOI: 10.1016/j.ccr.2020.213259] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Lazou M, Tarushi A, Gritzapis P, Psomas G. Transition metal complexes with a novel guanine-based (E)-2-(2-(pyridin-2-ylmethylene)hydrazinyl)quinazolin-4(3H)-one: Synthesis, characterization, interaction with DNA and albumins and antioxidant activity. J Inorg Biochem 2020; 206:111019. [DOI: 10.1016/j.jinorgbio.2020.111019] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 01/20/2020] [Accepted: 02/04/2020] [Indexed: 10/25/2022]
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15
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Ma Y, Yu H, Liu W, Qin Y, Xing R, Li P. Integrated proteomics and metabolomics analysis reveals the antifungal mechanism of the C-coordinated O-carboxymethyl chitosan Cu(II) complex. Int J Biol Macromol 2019; 155:1491-1509. [PMID: 31751736 DOI: 10.1016/j.ijbiomac.2019.11.127] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2019] [Revised: 11/06/2019] [Accepted: 11/14/2019] [Indexed: 12/31/2022]
Abstract
With wide application in agriculture, copper fungicides have undergone three stages of development: inorganic copper, synthetic organic copper, and natural organic copper. Using chitin/chitosan (CS) as a substrate, the natural organic copper fungicide C-coordinated O-carboxymethyl chitosan Cu(II) complex (O-CSLn-Cu) was developed in the laboratory. Taking Phytophthora capsici Leonian as an example, we explored the antifungal mechanism of O-CSLn-Cu by combining tandem mass tag (TMT)-based proteomics with non-targeted liquid chromatography-mass spectrometry (LC-MS)-based metabolomics. A total of 1172 differentially expressed proteins were identified by proteomics analysis. According to the metabolomics analysis, 93 differentially metabolites were identified. Acetyl-CoA-related and membrane localized proteins showed significant differences in the proteomics analysis. Most of the differential expressed metabolites were distributed in the cytoplasm, followed by mitochondria. The integrated analysis revealed that O-CSLn-Cu could induce the "Warburg effect", with increased glycolysis in the cytoplasm and decreased metabolism in the mitochondria. Therefore, P. capsici Leonian had to compensate for ATP loss in the TCA cycle by increasing the glycolysis rate. However, this metabolic shift could not prevent the death of P. capsici Leonian. To verify this hypothesis, a series of biological experiments, such as scanning electron microscopy (SEM), transmission electron microscopy (TEM), and enzyme activity measurements were carried out. The results suggest that O-CSLn-Cu causes mitochondrial injury, which consequently leads to excessive ROS levels and insufficient ATP levels, thereby killing P. capsici Leonian.
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Affiliation(s)
- Yuzhen Ma
- Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), No. 1 Wenhai Road, Qingdao 266237, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Huahua Yu
- Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), No. 1 Wenhai Road, Qingdao 266237, China.
| | - Weixiang Liu
- Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), No. 1 Wenhai Road, Qingdao 266237, China
| | - Yukun Qin
- Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), No. 1 Wenhai Road, Qingdao 266237, China
| | - Ronge Xing
- Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), No. 1 Wenhai Road, Qingdao 266237, China
| | - Pengcheng Li
- Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), No. 1 Wenhai Road, Qingdao 266237, China.
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16
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Singh N, Paknikar KM, Rajwade J. Gene expression is influenced due to 'nano' and 'ionic' copper in pre-formed Pseudomonas aeruginosa biofilms. ENVIRONMENTAL RESEARCH 2019; 175:367-375. [PMID: 31153105 DOI: 10.1016/j.envres.2019.05.034] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 05/20/2019] [Accepted: 05/21/2019] [Indexed: 06/09/2023]
Abstract
Today, researchers across the globe suggest the use of antimicrobial coatings containing copper nanoparticles (CuNPs) complementing the traditional protocols to prevent hospital-acquired infections (HAIs). Since Pseudomonas aeruginosa is one of the commonest opportunistic pathogens, we assessed the anti-biofilm activity of CuNPs in P. aeruginosa MTCC 3541 and compared it with Cu2+ (copper sulphate) since the latter continues to be used as an antimicrobial-of-choice in food industries, agriculture and water treatment. In this study, we synthesized and characterized stable poly-acrylic acid (PAA) coated CuNPs with a size of 66-150 nm and zeta potential -13 mV. Pseudomonas aeruginosa MTCC 3541 biofilms were highly resistant to both CuNPs and Cu2+ (minimum biofilm inhibitory concentration, MBIC 300 and >600 μg/mL respectively). Scanning electron microscopy revealed alterations in cell morphology upon treatment with CuNPs. A closer analysis of the biofilm-specific gene expression (qRT-PCR) revealed that CuNPs downregulated the genes involved in biofilm matrix formation, motility, efflux, membrane lipoprotein synthesis and DNA replication. Both, CuNPs and Cu2+ up regulated copper resistance and biofilm dispersion genes. Copper did not affect the bacterial communication system as evidenced by downregulation of the negative regulator of quorum sensing. The gene expression analysis reveals multiple cellular targets for CuNPs and ionic Cu. The present study highlights the fact that CuNPs affect the membrane functions adversely damaging the cell surface. In pre-formed biofilms, CuNPs were more toxic and displayed distinct responses attributable due to 'nano' and 'ionic' copper. Our findings thus support the use of CuNPs for curbing HAIs.
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Affiliation(s)
- Nimisha Singh
- Nanobioscience Group, Agharkar Research Institute, G. G. Agarkar Road, Pune, 411 004, Maharashtra, India; Savitribai Phule Pune University, Ganeshkind Road, Pune, 41107, Maharashtra, India
| | - Kishore M Paknikar
- Nanobioscience Group, Agharkar Research Institute, G. G. Agarkar Road, Pune, 411 004, Maharashtra, India; Savitribai Phule Pune University, Ganeshkind Road, Pune, 41107, Maharashtra, India.
| | - Jyutika Rajwade
- Nanobioscience Group, Agharkar Research Institute, G. G. Agarkar Road, Pune, 411 004, Maharashtra, India; Savitribai Phule Pune University, Ganeshkind Road, Pune, 41107, Maharashtra, India.
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17
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Synthesis and structural characterization of antimicrobial binuclear copper(II) coordination compounds bridged by hydroxy- and/or thiodipropionic acid. J Inorg Biochem 2019; 191:8-20. [DOI: 10.1016/j.jinorgbio.2018.10.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Revised: 10/19/2018] [Accepted: 10/23/2018] [Indexed: 11/22/2022]
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18
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Kumar S, Sharma RP, Venugopalan P, Ferretti V, Perontsis S, Psomas G. Copper(II) diclofenac complexes: Synthesis, structural studies and interaction with albumins and calf-thymus DNA. J Inorg Biochem 2018; 187:97-108. [DOI: 10.1016/j.jinorgbio.2018.07.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2018] [Revised: 06/30/2018] [Accepted: 07/19/2018] [Indexed: 12/24/2022]
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19
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The Cu-containing TiO 2 coatings with modulatory effects on macrophage polarization and bactericidal capacity prepared by micro-arc oxidation on titanium substrates. Colloids Surf B Biointerfaces 2018; 170:242-250. [PMID: 29933233 DOI: 10.1016/j.colsurfb.2018.06.020] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 05/15/2018] [Accepted: 06/14/2018] [Indexed: 10/28/2022]
Abstract
The implant materials with both osteogenic and anti-bacterial properties are promising for orthopedic and dental applications. Moreover, the inflammatory response induced by biomaterials has been recently recognized as one of the critical factors in determining implantation fate. A new generation of implant materials should have modulatory effects on the local inflammatory environment such that it favors osteogenesis and osteointegration instead of being bio-inert. In this study, the micro-arc oxidation (MAO) technique was employed to fabricate Cu-containing ceramic coatings on titanium substrates. The macrophages cultured on Cu-containing MAO-fabricated surfaces were polarized to M1 phenotype, evidenced by the high expression levels of inducible nitric oxide synthase (iNOS), low expression levels of arginase1 (Arg1), enhanced pro-inflammatory cytokine interleukin-6 (IL-6) release and inhibited IL-4 and IL-10 (anti-inflammatory cytokines) release. The MAO-treated surface incorporated with larger amounts of Cu (referred as Cu(h)-MAO) could modulate a favorable inflammatory microenvironment for osteoblast-like cell differentiation. Moreover, the macrophages cultured on Cu(h)-MAO surface exhibited enhanced bacteria uptake and killing rate, indicating that the Cu(h)-MAO surface promoted the bactericidal capacity of macrophages. Together, Cu could be used as a promising modulatory agent for macrophage functions. The integration of Cu in biomaterials could lead to enhanced macrophage-mediated osteogenesis and bactericidal capacity.
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20
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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: 272] [Impact Index Per Article: 45.3] [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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21
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Rau JV, Wu VM, Graziani V, Fadeeva IV, Fomin AS, Fosca M, Uskoković V. The Bone Building Blues: Self-hardening copper-doped calcium phosphate cement and its in vitro assessment against mammalian cells and bacteria. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017. [PMID: 28629018 DOI: 10.1016/j.msec.2017.05.052] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
A blue calcium phosphate cement with optimal self-hardening properties was synthesized by doping whitlockite (β-TCP) with copper ions. The mechanism and the kinetics of the cement solidification process were studied using energy dispersive X-ray diffraction and it was found out that hardening was accompanied by the phase transition from TCP to brushite. Reduced lattice parameters in all crystallographic directions resulting from the rather low (1:180) substitution rate of copper for calcium was consistent with the higher ionic radius of the latter. The lower cationic hydration resulting from the partial Ca→Cu substitution facilitated the release of constitutive hydroxyls and lowered the energy of formation of TCP from the apatite precursor at elevated temperatures. Addition of copper thus effectively inhibited the formation of apatite as the secondary phase. The copper-doped cement exhibited an antibacterial effect, though exclusively against Gram-negative bacteria, including E. coli, P. aeruginosa and S. enteritidis. This antibacterial effect was due to copper ions, as demonstrated by an almost negligible antibacterial effect of the pure, copper-free cement. Also, the antibacterial activity of the copper-containing cement was significantly higher than that of its precursor powder. Since there was no significant difference between the kinetics of the release of copper from the precursor TCP powder and from the final, brushite phase of the hardened cement, this has suggested that the antibacterial effect was not solely due to copper ions, but due to the synergy between cationic copper and a particular phase and aggregation state of calcium phosphate. Though inhibitory to bacteria, the copper-doped cement increased the viability of human glial E297 cells, murine osteoblastic K7M2 cells and especially human primary lung fibroblasts. That this effect was also due to copper ions was evidenced by the null effect on viability increase exhibited by the copper-free cements. The difference in the mechanism of protection of dehydratases in prokaryotes and eukaryotes was used as a rationale for explaining the hereby evidenced selectivity in biological response. It presents the basis for the consideration of copper as a dually effective ion when synergized with calcium phosphates: toxic for bacteria and beneficial for the healthy cells.
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Affiliation(s)
- Julietta V Rau
- Istituto di Struttura della Materia, Consiglio Nazionale delle Ricerche (ISM-CNR), Via del Fosso del Cavaliere, 100-00133 Rome, Italy.
| | - Victoria M Wu
- Department of Biomedical and Pharmaceutical Sciences, Center for Targeted Drug Delivery, Chapman University, Irvine, CA 92618-1908, USA
| | - Valerio Graziani
- Istituto di Struttura della Materia, Consiglio Nazionale delle Ricerche (ISM-CNR), Via del Fosso del Cavaliere, 100-00133 Rome, Italy
| | - Inna V Fadeeva
- AA Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Leninsky prospect 49, 119991 Moscow, Russia
| | - Alexander S Fomin
- AA Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Leninsky prospect 49, 119991 Moscow, Russia
| | - Marco Fosca
- Istituto di Struttura della Materia, Consiglio Nazionale delle Ricerche (ISM-CNR), Via del Fosso del Cavaliere, 100-00133 Rome, Italy
| | - Vuk Uskoković
- Department of Biomedical and Pharmaceutical Sciences, Center for Targeted Drug Delivery, Chapman University, Irvine, CA 92618-1908, USA.
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22
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Kostelidou A, Kalogiannis S, Begou OA, Perdih F, Turel I, Psomas G. Synthesis, structure and biological activity of copper(II) complexes with gatifloxacin. Polyhedron 2016. [DOI: 10.1016/j.poly.2016.09.012] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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23
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Ahire JJ, Hattingh M, Neveling DP, Dicks LMT. Copper-Containing Anti-Biofilm Nanofiber Scaffolds as a Wound Dressing Material. PLoS One 2016; 11:e0152755. [PMID: 27028292 PMCID: PMC4814046 DOI: 10.1371/journal.pone.0152755] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Accepted: 03/18/2016] [Indexed: 12/15/2022] Open
Abstract
Copper particles were incorporated into nanofibers during the electrospinning of poly-D,L-lactide (PDLLA) and poly(ethylene oxide) (PEO). The ability of the nanofibers to prevent Pseudomonas aeruginosa PA01 and Staphylococcus aureus (strain Xen 30) to form biofilms was tested. Nanofibers containing copper particles (Cu-F) were thinner (326 ± 149 nm in diameter), compared to nanofibers without copper (CF; 445 ± 93 nm in diameter). The crystalline structure of the copper particles in Cu-F was confirmed by X-ray diffraction (XRD). Copper crystals were encapsulated, but also attached to the surface of Cu-F, as shown scanning transmission electron microscopy (STEM) and transmission electron microscopy (TEM), respectively. The copper particles had no effect on the thermal degradation and thermal behaviour of Cu-F, as shown by thermogravimetric analysis (TGA) and differential scanning calorimeter (DSC). After 48 h in the presence of Cu-F, biofilm formation by P. aeruginosa PA01 and S. aureus Xen 30 was reduced by 41% and 50%, respectively. Reduction in biofilm formation was ascribed to copper released from the nanofibers. Copper-containing nanofibers may be incorporated into wound dressings.
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Affiliation(s)
- Jayesh J. Ahire
- Department of Microbiology, University of Stellenbosch, 7602 Matieland (Stellenbosch), South Africa
| | - Melanie Hattingh
- Department of Microbiology, University of Stellenbosch, 7602 Matieland (Stellenbosch), South Africa
| | - Deon P. Neveling
- Department of Microbiology, University of Stellenbosch, 7602 Matieland (Stellenbosch), South Africa
| | - Leon M. T. Dicks
- Department of Microbiology, University of Stellenbosch, 7602 Matieland (Stellenbosch), South Africa
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24
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Physicochemical properties of copper important for its antibacterial activity and development of a unified model. Biointerphases 2016; 11:018902. [DOI: 10.1116/1.4935853] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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25
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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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26
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Copper Reduction and Contact Killing of Bacteria by Iron Surfaces. Appl Environ Microbiol 2015; 81:6399-403. [PMID: 26150470 DOI: 10.1128/aem.01725-15] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2015] [Accepted: 07/02/2015] [Indexed: 01/02/2023] Open
Abstract
The well-established killing of bacteria by copper surfaces, also called contact killing, is currently believed to be a combined effect of bacterial contact with the copper surface and the dissolution of copper, resulting in lethal bacterial damage. Iron can similarly be released in ionic form from iron surfaces and would thus be expected to also exhibit contact killing, although essentially no contact killing is observed by iron surfaces. However, we show here that the exposure of bacteria to iron surfaces in the presence of copper ions results in efficient contact killing. The process involves reduction of Cu(2+) to Cu(+) by iron; Cu(+) has been shown to be considerably more toxic to cells than Cu(2+). The specific Cu(+) chelator, bicinchoninic acid, suppresses contact killing by chelating the Cu(+) ions. These findings underline the importance of Cu(+) ions in the contact killing process and infer that iron-based alloys containing copper could provide novel antimicrobial materials.
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27
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Medici S, Peana M, Nurchi VM, Lachowicz JI, Crisponi G, Zoroddu MA. Noble metals in medicine: Latest advances. Coord Chem Rev 2015. [DOI: 10.1016/j.ccr.2014.08.002] [Citation(s) in RCA: 373] [Impact Index Per Article: 41.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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28
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Chen CW, Hsu CY, Lai SM, Syu WJ, Wang TY, Lai PS. Metal nanobullets for multidrug resistant bacteria and biofilms. Adv Drug Deliv Rev 2014; 78:88-104. [PMID: 25138828 DOI: 10.1016/j.addr.2014.08.004] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2013] [Revised: 06/27/2014] [Accepted: 08/11/2014] [Indexed: 12/19/2022]
Abstract
Infectious diseases were one of the major causes of mortality until now because drug-resistant bacteria have arisen under broad use and abuse of antibacterial drugs. These multidrug-resistant bacteria pose a major challenge to the effective control of bacterial infections and this threat has prompted the development of alternative strategies to treat bacterial diseases. Recently, use of metallic nanoparticles (NPs) as antibacterial agents is one of the promising strategies against bacterial drug resistance. This review first describes mechanisms of bacterial drug resistance and then focuses on the properties and applications of metallic NPs as antibiotic agents to deal with antibiotic-sensitive and -resistant bacteria. We also provide an overview of metallic NPs as bactericidal agents combating antibiotic-resistant bacteria and their potential in vivo toxicology for further drug development.
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Affiliation(s)
- Ching-Wen Chen
- Department of Chemistry, National Chung Hsing University, 250, Kuo Kuang Rd., Taichung 402, Taiwan
| | - Chia-Yen Hsu
- Department of Chemistry, National Chung Hsing University, 250, Kuo Kuang Rd., Taichung 402, Taiwan
| | - Syu-Ming Lai
- Department of Chemistry, National Chung Hsing University, 250, Kuo Kuang Rd., Taichung 402, Taiwan
| | - Wei-Jhe Syu
- Department of Chemistry, National Chung Hsing University, 250, Kuo Kuang Rd., Taichung 402, Taiwan
| | - Ting-Yi Wang
- Department of Chemistry, National Chung Hsing University, 250, Kuo Kuang Rd., Taichung 402, Taiwan
| | - Ping-Shan Lai
- Department of Chemistry, National Chung Hsing University, 250, Kuo Kuang Rd., Taichung 402, Taiwan; Research Center for Sustainable Energy and Nanotechnology, National Chung Hsing University, 250, Kuo Kuang Rd., Taichung 402, Taiwan.
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29
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Cui Z, Ibrahim M, Yang C, Fang Y, Annam H, Li B, Wang Y, Xie GL, Sun G. Susceptibility of opportunistic Burkholderia glumae to copper surfaces following wet or dry surface contact. Molecules 2014; 19:9975-85. [PMID: 25010469 PMCID: PMC6271097 DOI: 10.3390/molecules19079975] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2014] [Revised: 07/03/2014] [Accepted: 07/04/2014] [Indexed: 11/16/2022] Open
Abstract
Burkholderia glumae has been proposed to have a potential risk to vulnerable communities. In this work, we investigated the antibacterial activity and mechanism of copper surfaces against multi-drug resistant B. glumae from both patients and rice plants. The susceptibility of B. glumae to copper surfaces was noted by a significant decline in viable bacterial counts, relative to the slight reduction of stainless steel and polyvinylchloride, both of which were used as control surfaces. The mode of action of bacterial killing was determined by examing the mutagenicity, DNA damage, copper ions accumulation, and membrane damage in bacterial cells. The results indicated that the cells exposed to copper surfaces did not cause severe DNA lesions or increase the mutation frequencies, but resulted in a loss of cell membrane integrity within minutes. Furthermore, bacterial cells exposed to copper surfaces accumulated significantly higher amounts of copper compared to control surfaces. Overall, this study showed that metallic copper had strong antibacterial effect against B. glumae by causing DNA and membrane damage, cellular accumulation of copper, and cell death following DNA degradation, which could be utilized to reduce the risk of bacterial contamination and infection.
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Affiliation(s)
- Zhouqi Cui
- State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China; E-Mails: (Z.C.); (C.Y.); (G.-L.X.)
| | - Muhammad Ibrahim
- State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China; E-Mails: (Z.C.); (C.Y.); (G.-L.X.)
- Department of Biosciences, COMSATS Institute of Information Technology, Sahiwal 57000, Pakistan; E-Mails: (M.I.); (H.A.)
| | - Chunlan Yang
- State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China; E-Mails: (Z.C.); (C.Y.); (G.-L.X.)
| | - Yuan Fang
- College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, China; E-Mail:
| | - Hussain Annam
- Department of Biosciences, COMSATS Institute of Information Technology, Sahiwal 57000, Pakistan; E-Mails: (M.I.); (H.A.)
| | - Bin Li
- State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China; E-Mails: (Z.C.); (C.Y.); (G.-L.X.)
| | - Yanli Wang
- Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China; E-Mail:
| | - Guan-Lin Xie
- State Key Laboratory of Rice Biology, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China; E-Mails: (Z.C.); (C.Y.); (G.-L.X.)
| | - Guochang Sun
- Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China; E-Mail:
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30
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Chen W, Ye D, Wang H, Lin D, Huang J, Sun H, Zhong W. Binding of oxo-Cu2 clusters to ferric ion-binding protein A from Neisseria gonorrhoeae: a structural insight. Metallomics 2014; 5:1430-9. [PMID: 23884152 DOI: 10.1039/c3mt00091e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The ferric ion-binding protein A (FbpA), a member of transferrin superfamily, is a periplasmic iron transporter employed by many Gram-negative pathogens. Our experiments indicated copper(ii) could bind with Neisseria gonorrhoeae FbpA (NgFbpA), and the binding constant reached up to (8.7 ± 0.2) × 10(8) M(-1)via UV-vis titration. The crystal structure of recombinant Cu-NgFbpA at 2.1 Å revealed that the oxo-Cu2 clusters (dinuclear centres) assembled in the iron binding cleft and were bound to the two adjacent tyrosine residues (Y195 and Y196) of the protein, two Cu ions coordinated with two tyrosines, Y195 and Y196, respectively, which was different from the binding model of Fe ion with FbpA, in which Y195 and Y196 coordinated together with one Fe ion. While this was similar to the binding of Zr and Hf ion clusters, Y195 and Y196 coordinated with two metal ions and the μ-oxo-bridges linking the metal ions. Structural superimposition demonstrated that oxo-Cu2-NgFbpA still keeping an open conformation, similar to the apo-form of NgFbpA. The structure presented additional information towards an understanding of the function of FbpA, and provided a detailed binding model for FbpA protein with the possible metal ions in a biological system.
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Affiliation(s)
- Weijing Chen
- School of Pharmacy, Second Military Medical University, Shanghai, P. R. China.
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de Abreu-Neto JB, Turchetto-Zolet AC, de Oliveira LFV, Zanettini MHB, Margis-Pinheiro M. Heavy metal-associated isoprenylated plant protein (HIPP): characterization of a family of proteins exclusive to plants. FEBS J 2013; 280:1604-16. [PMID: 23368984 DOI: 10.1111/febs.12159] [Citation(s) in RCA: 139] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2012] [Revised: 12/15/2012] [Accepted: 01/29/2013] [Indexed: 11/29/2022]
Abstract
Metallochaperones are key proteins for the safe transport of metallic ions inside the cell. HIPPs (heavy metal-associated isoprenylated plant proteins) are metallochaperones that contain a metal binding domain (HMA) and a C-terminal isoprenylation motif. In this study, we provide evidence that proteins of this family are found only in vascular plants and may be separated into five distinct clusters. HIPPs may be involved in (a) heavy metal homeostasis and detoxification mechanisms, especially those involved in cadmium tolerance, (b) transcriptional responses to cold and drought, and (c) plant-pathogen interactions. In particular, our results show that the rice (Oryza sativa) HIPP OsHIPP41 gene is highly expressed in response to cold and drought stresses, and its product is localized in the cytosol and the nucleus. The results suggest that HIPPs play an important role in the development of vascular plants and in plant responses to environmental changes.
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Affiliation(s)
- João Braga de Abreu-Neto
- Programa de Pós-Graduação em Biologia Celular e Molecular, Universidade Federal do Rio Grande do Sul, Brazil
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Contact killing of bacteria on copper is suppressed if bacterial-metal contact is prevented and is induced on iron by copper ions. Appl Environ Microbiol 2013; 79:2605-11. [PMID: 23396344 DOI: 10.1128/aem.03608-12] [Citation(s) in RCA: 110] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Bacteria are rapidly killed on copper surfaces, and copper ions released from the surface have been proposed to play a major role in the killing process. However, it has remained unclear whether contact of the bacteria with the copper surface is also an important factor. Using laser interference lithography, we engineered copper surfaces which were covered with a grid of an inert polymer which prevented contact of the bacteria with the surface. Using Enterococcus hirae as a model organism, we showed that the release of ionic copper from these modified surfaces was not significantly reduced. In contrast, killing of bacteria was strongly attenuated. When E. hirae cells were exposed to a solid iron surface, the loss of cell viability was the same as on glass. However, exposing cells to iron in the presence of 4 mM CuSO4 led to complete killing in 100 min. These experiments suggest that contact killing proceeds by a mechanism whereby the metal-bacterial contact damages the cell envelope, which, in turn, makes the cells susceptible to further damage by copper ions.
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