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Raza S, Wdowiak M, Paczesny J. An Overview of Diverse Strategies To Inactivate Enterobacteriaceae-Targeting Bacteriophages. EcoSal Plus 2023; 11:eesp00192022. [PMID: 36651738 PMCID: PMC10729933 DOI: 10.1128/ecosalplus.esp-0019-2022] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Accepted: 12/20/2022] [Indexed: 01/19/2023]
Abstract
Bacteriophages are viruses that infect bacteria and thus threaten industrial processes relying on the production executed by bacterial cells. Industries bear huge economic losses due to such recurring and resilient infections. Depending on the specificity of the process, there is a need for appropriate methods of bacteriophage inactivation, with an emphasis on being inexpensive and high efficiency. In this review, we summarize the reports on antiphagents, i.e., antibacteriophage agents on inactivation of bacteriophages. We focused on bacteriophages targeting the representatives of the Enterobacteriaceae family, as its representative, Escherichia coli, is most commonly used in the bio-industry. The review is divided into sections dealing with bacteriophage inactivation by physical factors, chemical factors, and nanotechnology-based solutions.
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Affiliation(s)
- Sada Raza
- Institute of Physical Chemistry, Polish Academy of Sciences, Warsaw, Poland
| | - Mateusz Wdowiak
- Institute of Physical Chemistry, Polish Academy of Sciences, Warsaw, Poland
| | - Jan Paczesny
- Institute of Physical Chemistry, Polish Academy of Sciences, Warsaw, Poland
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2
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Reyes-Carmona L, Sepúlveda-Robles OA, Almaguer-Flores A, Bello-Lopez JM, Ramos-Vilchis C, Rodil SE. Antimicrobial activity of silver-copper coating against aerosols containing surrogate respiratory viruses and bacteria. PLoS One 2023; 18:e0294972. [PMID: 38079398 PMCID: PMC10712891 DOI: 10.1371/journal.pone.0294972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Accepted: 11/10/2023] [Indexed: 12/18/2023] Open
Abstract
The transmission of bacteria and respiratory viruses through expelled saliva microdroplets and aerosols is a significant concern for healthcare workers, further highlighted during the SARS-CoV-2 pandemic. To address this issue, the development of nanomaterials with antimicrobial properties for use as nanolayers in respiratory protection equipment, such as facemasks or respirators, has emerged as a potential solution. In this study, a silver and copper nanolayer called SakCu® was deposited on one side of a spun-bond polypropylene fabric using the magnetron sputtering technique. The antibacterial and antiviral activity of the AgCu nanolayer was evaluated against droplets falling on the material and aerosols passing through it. The effectiveness of the nanolayer was assessed by measuring viral loads of the enveloped virus SARS-CoV-2 and viability assays using respiratory surrogate viruses, including PaMx54, PaMx60, PaMx61 (ssRNA, Leviviridae), and PhiX174 (ssDNA, Microviridae) as representatives of non-enveloped viruses. Colony forming unit (CFU) determination was employed to evaluate the survival of aerobic and anaerobic bacteria. The results demonstrated a nearly exponential reduction in SARS-CoV-2 viral load, achieving complete viral load reduction after 24 hours of contact incubation with the AgCu nanolayer. Viability assays with the surrogate viruses showed a significant reduction in viral replication between 2-4 hours after contact. The simulated viral filtration system demonstrated inhibition of viral replication ranging from 39% to 64%. The viability assays with PhiX174 exhibited a 2-log reduction in viral replication after 24 hours of contact and a 16.31% inhibition in viral filtration assays. Bacterial growth inhibition varied depending on the species, with reductions ranging from 70% to 92% for aerobic bacteria and over 90% for anaerobic strains. In conclusion, the AgCu nanolayer displayed high bactericidal and antiviral activity in contact and aerosol conditions. Therefore, it holds the potential for incorporation into personal protective equipment to effectively reduce and prevent the transmission of aerosol-borne pathogenic bacteria and respiratory viruses.
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Affiliation(s)
- Lorena Reyes-Carmona
- Laboratorio de Biointerfases, DEPeI, Facultad de Odontología, Universidad Nacional Autónoma de México, CDMX, México
- Programa de Maestría y Doctorado en Ciencias Médicas Odontológicas y de la Salud, Facultad de Odontología, Universidad Nacional Autónoma de México, CDMX, México
| | - Omar A. Sepúlveda-Robles
- Unidad de Investigación Médica en Genética Humana, UMAE Hospital de Pediatría, Centro Médico Nacional "Siglo XXI", Instituto Mexicano del Seguro Social (IMSS), CDMX, México
| | - Argelia Almaguer-Flores
- Laboratorio de Biointerfases, DEPeI, Facultad de Odontología, Universidad Nacional Autónoma de México, CDMX, México
| | - Juan Manuel Bello-Lopez
- Dirección de Investigación, Hospital Juárez de México, Magdalena de las Salinas, CDMX, México
| | - Carlos Ramos-Vilchis
- Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, CDMX, México
| | - Sandra E. Rodil
- Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, CDMX, México
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Richter-Bisson ZW, Doktor A, Hedberg YS. Serum Albumin Aggregation Facilitated by Cobalt and Chromium Metal Ions. ACS APPLIED BIO MATERIALS 2023; 6:3832-3841. [PMID: 37610418 DOI: 10.1021/acsabm.3c00463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/24/2023]
Abstract
The interaction of serum proteins with cobalt (Co) and chromium (Cr) ions is poorly understood, but it is suspected to result in protein aggregation, which may alter the corrosion process of biomedical CoCr alloys or result in adverse health effects. Here, we study the aggregation ability and mechanism of bovine serum albumin (BSA) induced or accelerated by aqueous Co(II) and Cr(III) ions. The metal salts were selected by chemical speciation modeling, and they did not affect the pH or precipitate under simulated physiological conditions (150 mM NaCl and pH 7.3). The counterion of Cr(III) influenced the binding to BSA only at physiologically irrelevant low ionic strength. This study used a variety of spectroscopic and light scattering methods. It was determined that both metal ions and an equimolar mixture of metal ions have the potential to induce protein aggregation. Melting curves collected by circular dichroism spectroscopy indicate that Co(II) significantly reduced BSA's melting temperature when compared with Cr(III) or an equimolar mixture of Co(II) and Cr(III), both of which increased the melting temperature of BSA. The metal ions in solution preferentially interacted with BSA, resulting in the depletion of metal ions from the surrounding protein-free solution. Finally, this study suggests that the likely mechanism for Co(II)- and Cr(III)-induced BSA aggregation is salt bridging between protein molecules.
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Affiliation(s)
| | - Aleksandra Doktor
- Department of Chemistry, Western University, London, ON N6A 5B7, Canada
| | - Yolanda Susanne Hedberg
- Department of Chemistry, Western University, London, ON N6A 5B7, Canada
- Surface Science Western, Western University, London, ON N6G 0J3, Canada
- Lawson Health Research Institute, London, ON N6C2R5, Canada
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Gauthier K, Pankovic D, Nikolic M, Hobert M, Germeier CU, Ordon F, Perovic D, Niehl A. Nutrients and soil structure influence furovirus infection of wheat. FRONTIERS IN PLANT SCIENCE 2023; 14:1200674. [PMID: 37600210 PMCID: PMC10436314 DOI: 10.3389/fpls.2023.1200674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Accepted: 07/14/2023] [Indexed: 08/22/2023]
Abstract
Soil-borne wheat mosaic virus (SBWMV) and Soil-borne cereal mosaic virus (SBCMV), genus Furovirus, family Virgaviridae, cause significant crop losses in cereals. The viruses are transmitted by the soil-borne plasmodiophorid Polymyxa graminis. Inside P. graminis resting spores, the viruses persist in the soil for long time, which makes the disease difficult to combat. To open up novel possibilities for virus control, we explored the influence of physical and chemical soil properties on infection of wheat with SBWMV and SBCMV. Moreover, we investigated, whether infection rates are influenced by the nutritional state of the plants. Infection rates of susceptible wheat lines were correlated to soil structure parameters and nutrient contents in soil and plants. Our results show that SBWMV and SBCMV infection rates decrease the more water-impermeable the soil is and that virus transmission depends on pH. Moreover, we found that contents of several nutrients in the soil (e.g. phosphorous, magnesium, zinc) and in planta (e.g. nitrogen, carbon, boron, sulfur, calcium) affect SBWMV and SBCMV infection rates. The knowledge generated may help paving the way towards development of a microenvironment-adapted agriculture.
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Affiliation(s)
- Kevin Gauthier
- Julius Kühn Institute (JKI) – Federal Research Centre for Cultivated Plants, Institute for Epidemiology and Pathogen Diagnostics, Brunswick, Germany
| | - Dejana Pankovic
- Julius Kühn Institute (JKI) – Federal Research Centre for Cultivated Plants, Institute for Resistance Research and Stress Tolerance, Quedlinburg, Germany
| | - Miroslav Nikolic
- Institute for Multidisciplinary Research, University of Belgrade, Belgrade, Serbia
| | - Mirko Hobert
- State Institute for Agriculture and Horticulture Saxony-Anhalt, Centre for Agricultural Investigations, Bernburg, Germany
| | - Christoph U. Germeier
- Julius Kühn Institute (JKI) – Federal Research Centre for Cultivated Plants, Institute for Breeding Research on Agricultural Crops, Quedlinburg, Germany
| | - Frank Ordon
- Julius Kühn Institute (JKI) – Federal Research Centre for Cultivated Plants, Institute for Resistance Research and Stress Tolerance, Quedlinburg, Germany
| | - Dragan Perovic
- Julius Kühn Institute (JKI) – Federal Research Centre for Cultivated Plants, Institute for Resistance Research and Stress Tolerance, Quedlinburg, Germany
| | - Annette Niehl
- Julius Kühn Institute (JKI) – Federal Research Centre for Cultivated Plants, Institute for Epidemiology and Pathogen Diagnostics, Brunswick, Germany
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Soliman MYM, Medema G, van Halem D. Enhanced virus inactivation by copper and silver ions in the presence of natural organic matter in water. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 882:163614. [PMID: 37086991 DOI: 10.1016/j.scitotenv.2023.163614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 04/16/2023] [Accepted: 04/16/2023] [Indexed: 05/03/2023]
Abstract
Natural organic matter (NOM) is present in water matrix that serves as a drinking water source. This study examined the effect of low and high NOM concentrations on inactivation kinetics of a model RNA virus (MS2) and a model DNA virus (PhiX 174) by copper (Cu2+) and/or silver (Ag+) ions. Cu and Ag are increasingly applied in household water treatment (HHWT) systems. However, the impact of NOM on their inactivation kinetics remains elusive despite its importance for their application. The presence of NOM in water led to faster virus inactivation by Cu2+ but slower by Ag+. The fastest inactivation kinetics of MS2 (Kobs = 4.8 h-1) were observed by Cu in water containing high NOM (20 mg C/L). Meanwhile, for PhiX 174, the fastest inactivation kinetics (av. Kobs = 3.5 h-1) were observed by Cu and Ag synergism in water containing high NOM. Altogether, it can be concluded that the combination of Cu and Ag is promising as a virus disinfectant in treatment options allowing for multiple hours of residence time such as safe water storage tanks.
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Affiliation(s)
- Mona Y M Soliman
- Department of Water Management, Delft University of Technology, Stevinweg 1, 2628 CN Delft, the Netherlands.
| | - Gertjan Medema
- Department of Water Management, Delft University of Technology, Stevinweg 1, 2628 CN Delft, the Netherlands; KWR Watercycle Research Institute, P.O. Box 1072, 3430 BB Nieuwegein, the Netherlands
| | - Doris van Halem
- Department of Water Management, Delft University of Technology, Stevinweg 1, 2628 CN Delft, the Netherlands
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Karczewska M, Strzelecki P, Szalewska-Pałasz A, Nowicki D. How to Tackle Bacteriophages: The Review of Approaches with Mechanistic Insight. Int J Mol Sci 2023; 24:ijms24054447. [PMID: 36901878 PMCID: PMC10003480 DOI: 10.3390/ijms24054447] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Revised: 02/21/2023] [Accepted: 02/22/2023] [Indexed: 02/26/2023] Open
Abstract
Bacteriophage-based applications have a renaissance today, increasingly marking their use in industry, medicine, food processing, biotechnology, and more. However, phages are considered resistant to various harsh environmental conditions; besides, they are characterized by high intra-group variability. Phage-related contaminations may therefore pose new challenges in the future due to the wider use of phages in industry and health care. Therefore, in this review, we summarize the current knowledge of bacteriophage disinfection methods, as well as highlight new technologies and approaches. We discuss the need for systematic solutions to improve bacteriophage control, taking into account their structural and environmental diversity.
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Affiliation(s)
- Monika Karczewska
- Department of Bacterial Molecular Genetics, Faculty of Biology, University of Gdansk, Wita Stwosza 59, 80-308 Gdansk, Poland
| | - Patryk Strzelecki
- Department of Bacterial Molecular Genetics, Faculty of Biology, University of Gdansk, Wita Stwosza 59, 80-308 Gdansk, Poland
- Institut de Physique et Chimie des Matériaux de Strasbourg, Université de Strasbourg, CNRS, UMR7504, 23 rue du Loess, CEDEX 2, F-67034 Strasbourg, France
| | - Agnieszka Szalewska-Pałasz
- Department of Bacterial Molecular Genetics, Faculty of Biology, University of Gdansk, Wita Stwosza 59, 80-308 Gdansk, Poland
| | - Dariusz Nowicki
- Department of Bacterial Molecular Genetics, Faculty of Biology, University of Gdansk, Wita Stwosza 59, 80-308 Gdansk, Poland
- Correspondence: ; Tel.: +48-58-523-6065
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Pacho MO, Deeney D, Johnson EA, Bravo BN, Patel K, Latta MA, Belshan MA, Gross SM. Characterization of Ag-Ion Releasing Zeolite Filled 3D Printed Resins. J Funct Biomater 2022; 14:jfb14010007. [PMID: 36662054 PMCID: PMC9861246 DOI: 10.3390/jfb14010007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 12/16/2022] [Accepted: 12/20/2022] [Indexed: 12/24/2022] Open
Abstract
There has been profound growth in the use of 3D printed materials in dentistry in general, including orthodontics. The opportunity to impart antimicrobial properties to 3D printed parts from existing resins requires the capability of forming a stable colloid incorporating antimicrobial fillers. The objective of this research was to characterize a colloid consisting of a 3D printable resin mixed with Ag-ion releasing zeolites and fumed silica to create 3D printed parts with antiviral properties. The final composite was tested for antiviral properties against SARS-CoV-2 and HIV-1. Antiviral activity was measured in terms of the half-life of SARS-CoV-2 and HIV-1 on the composite surface. The inclusion of the zeolite did not interfere with the kinetics measured on the surface of the ATR crystal. While the depth of cure, measured following ISO4049 guidelines, was reduced from 3.8 mm to 1.4 mm in 5 s, this greatly exceeded the resolution required for 3D printing. The colloid was stable for at least 6 months and the rheological behavior was dependent upon the fumed silica loading. The inclusion of zeolites and fumed silica significantly increased the flexural strength of the composite as measured by a 3 point bend test. The composite released approximately 2500 μg/L of silver ion per gram of composite as determined by potentiometry. There was a significant reduction of the average half-life of SARS-CoV-2 (1.9 fold) and HIV-1 (2.7 fold) on the surface of the composite. The inclusion of Ag-ion releasing zeolites into 3D-printable resin can result in stable colloids that generate composites with improved mechanical properties and antiviral properties.
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Affiliation(s)
- Marian O. Pacho
- Department of Oral Biology, School of Dentistry, Creighton University, Omaha, NE 68178, USA
| | - Dylan Deeney
- Department of Medical Microbiology and Immunology, Creighton University, Omaha, NE 68178, USA
| | - Emily A. Johnson
- Department of Oral Biology, School of Dentistry, Creighton University, Omaha, NE 68178, USA
| | - Bryanna N. Bravo
- Department of Chemistry, College of Arts and Sciences, Creighton University, Omaha, NE 68178, USA
| | - Kishen Patel
- Department of Chemistry, College of Arts and Sciences, Creighton University, Omaha, NE 68178, USA
| | - Mark A. Latta
- Department of Oral Biology, School of Dentistry, Creighton University, Omaha, NE 68178, USA
| | - Michael A. Belshan
- Department of Medical Microbiology and Immunology, Creighton University, Omaha, NE 68178, USA
| | - Stephen M. Gross
- Department of Oral Biology, School of Dentistry, Creighton University, Omaha, NE 68178, USA
- Department of Chemistry, College of Arts and Sciences, Creighton University, Omaha, NE 68178, USA
- Correspondence:
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Sahihi M, Faraudo J. Computer Simulation of the Interaction between SARS-CoV-2 Spike Protein and the Surface of Coinage Metals. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:14673-14685. [PMID: 36418228 PMCID: PMC9730903 DOI: 10.1021/acs.langmuir.2c02120] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Revised: 11/07/2022] [Indexed: 06/16/2023]
Abstract
A prominent feature of the SARS-CoV-2 virus is the presence of a large glycoprotein spike protruding from the virus envelope. The spike determines the interaction of the virus with the environment and the host. Here, we used an all-atom molecular dynamics simulation method to investigate the interaction of up- and down-conformations of the S1 subunit of the SARS-CoV-2 spike with the (100) surface of Au, Ag, and Cu. Our results revealed that the spike protein is adsorbed onto the surface of these metals, with Cu being the metal with the highest interaction with the spike. In our simulations, we considered the spike protein in both its up-conformation Sup (one receptor binding domain exposed) and down-conformation Sdown (no exposed receptor binding domain). We found that the affinity of the metals for the up-conformation was higher than their affinity for the down-conformation. The structural changes in the spike in the up-conformation were also larger than the changes in the down-conformation. Comparing the present results for metals with those obtained in our previous MD simulations of Sup with other materials (cellulose, graphite, and human skin models), we see that Au induces the highest structural change in Sup, larger than those obtained in our previous studies.
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Nguyen TN, Do QH, Vu TTD, Nguyen TT, Nguyen DT, Nguyen TBN, Tran TTH, Vu TKO, Nghiem THL, Hoa TMT, Nguyen TMH, Bui PN, Nguyen MH, Pham DM, Tran TCT. Enhancement of antibacterial activity by a copper(II) and zinc(II) in chelation with ethylenediaminetetra-acetic acid and urea complex. CHEMICAL PAPERS 2022. [DOI: 10.1007/s11696-022-02361-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Tian H, He B, Yin Y, Liu L, Shi J, Hu L, Jiang G. Chemical Nature of Metals and Metal-Based Materials in Inactivation of Viruses. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:2345. [PMID: 35889570 PMCID: PMC9323642 DOI: 10.3390/nano12142345] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Revised: 07/05/2022] [Accepted: 07/06/2022] [Indexed: 02/04/2023]
Abstract
In response to the enormous threat to human survival and development caused by the large number of viruses, it is necessary to strengthen the defense against and elimination of viruses. Metallic materials have been used against viruses for thousands of years due to their broad-spectrum antiviral properties, wide sources and excellent physicochemical properties; in particular, metal nanoparticles have advanced biomedical research. However, researchers in different fields hold dissimilar views on the antiviral mechanisms, which has slowed down the antiviral application of metal nanoparticles. As such, this review begins with an exhaustive compilation of previously published work on the antiviral capacity of metal nanoparticles and other materials. Afterwards, the discussion is centered on the antiviral mechanisms of metal nanoparticles at the biological and physicochemical levels. Emphasis is placed on the fact that the strong reducibility of metal nanoparticles may be the main reason for their efficient inactivation of viruses. We hope that this review will benefit the promotion of metal nanoparticles in the antiviral field and expedite the construction of a barrier between humans and viruses.
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Affiliation(s)
- Haozhong Tian
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Beijing 100085, China; (H.T.); (B.H.); (Y.Y.); (L.L.); (J.S.); (G.J.)
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Bin He
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Beijing 100085, China; (H.T.); (B.H.); (Y.Y.); (L.L.); (J.S.); (G.J.)
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
- School of Environment, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China
| | - Yongguang Yin
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Beijing 100085, China; (H.T.); (B.H.); (Y.Y.); (L.L.); (J.S.); (G.J.)
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
- School of Environment, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China
| | - Lihong Liu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Beijing 100085, China; (H.T.); (B.H.); (Y.Y.); (L.L.); (J.S.); (G.J.)
| | - Jianbo Shi
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Beijing 100085, China; (H.T.); (B.H.); (Y.Y.); (L.L.); (J.S.); (G.J.)
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
- School of Environment and Health, Jianghan University, Wuhan 430056, China
| | - Ligang Hu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Beijing 100085, China; (H.T.); (B.H.); (Y.Y.); (L.L.); (J.S.); (G.J.)
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
- School of Environment, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China
- School of Environment and Health, Jianghan University, Wuhan 430056, China
| | - Guibin Jiang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Beijing 100085, China; (H.T.); (B.H.); (Y.Y.); (L.L.); (J.S.); (G.J.)
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
- School of Environment, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China
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Field and Laboratory Assessment of a New Electrolytic Point-of-Use Water Treatment Technology. WATER 2022. [DOI: 10.3390/w14071077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
This research creates and implements a new electrolytic point-of-use water treatment (POUWT) device. Device development began by applying two voltages common to commercially available batteries to an apparatus with either two silver or copper wires submerged into synthetic groundwater. The effects of wire diameter, ionic strength of groundwater, and other POUWT parameters on metallic ion release were analyzed. We determined that the silver wire apparatus need only to be run for 2 min at 9 V to yield the target 50 µg/L concentration for water treatment. The 50 µg/L silver yielded up to a 5-log reduction in E. coli bacteria. The copper wire apparatus was excluded in prototype fabrication because it required 62 min to release the target 500 µg/L for disinfection when nine volts were applied to the system and was less effective in disinfection than silver wires. The electrolytic prototype was evaluated in 20 households in Limpopo, South Africa, over a four-week period. The device achieved a 2-log reduction in total coliform bacteria in household drinking water, which is comparable to the field performance of other POUWT devices in low-resource settings. The device also consistently released enough silver sufficient for disinfection while remaining below the WHO drinking water guideline.
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Fate and Transportation of Viruses from Reclaimed Water into a Floatation System. WATER 2022. [DOI: 10.3390/w14050781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The fate and transport of viruses in floatation systems is considerably important for accurate determination of the safety of reusing reclaimed water in the flotation process. Herein, simulation experiments on the floatation, adsorption and desorption were performed to examine the effect of initial virus concentration, pH and floatation reagents on the adsorption of viruses ΦΧ174 and MS2 onto copper–molybdenum ores. The transport of viruses in the flotation systems was also investigated. The viruses in the reclaimed water were rapidly adsorbed onto the ore particles, suggesting that tailing wastewater can be safely reused for floatation. However, the adsorbed viruses in the concentrates, middlings and tailings may pose health risks at certain exposure levels. The transport of viruses was dominated by their attachment to ore particles, with most being inactivated or irreversibly adsorbed. The removal and adsorption rates decreased as the initial virus concentration increased, and the removal rate decreased as pH was increased from 7.5 to 9.5. In comparison with MS2, ΦΧ174 was removed more effectively. This suggested that electrostatic repulsion is an important mechanism because MS2 has a greater negative charge. The attachment of both ΦΧ174 and MS2 onto the mineral particles increased significantly in the presence of PJ053 and CaO.
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Understanding the antibacterial mechanisms of copper ion treatment on Mycobacterium avium subsp. paratuberculosis. Vet Microbiol 2022; 268:109412. [DOI: 10.1016/j.vetmic.2022.109412] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 03/18/2022] [Accepted: 03/26/2022] [Indexed: 11/23/2022]
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Molan K, Rahmani R, Krklec D, Brojan M, Stopar D. Phi 6 Bacteriophage Inactivation by Metal Salts, Metal Powders, and Metal Surfaces. Viruses 2022; 14:204. [PMID: 35215798 PMCID: PMC8877498 DOI: 10.3390/v14020204] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 01/17/2022] [Accepted: 01/17/2022] [Indexed: 12/12/2022] Open
Abstract
The interaction of phages with abiotic environmental surfaces is usually an understudied field of phage ecology. In this study, we investigated the virucidal potential of different metal salts, metal and ceramic powders doped with Ag and Cu ions, and newly fabricated ceramic and metal surfaces against Phi6 bacteriophage. The new materials were fabricated by spark plasma sintering (SPS) and/or selective laser melting (SLM) techniques and had different surface free energies and infiltration features. We show that inactivation of Phi6 in solutions with Ag and Cu ions can be as effective as inactivation by pH, temperature, or UV. Adding powder to Ag and Cu ion solutions decreased their virucidal effect. The newly fabricated ceramic and metal surfaces showed very good virucidal activity. In particular, 45%TiO2 + 5%Ag + 45%ZrO2 + 5%Cu, in addition to virus adhesion, showed virucidal and infiltration properties. The results indicate that more than 99.99% of viruses deposited on the new ceramic surface were inactivated or irreversibly attached to it.
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Affiliation(s)
- Katja Molan
- Department of Microbiology, Biotechnical Faculty, University of Ljubljana, Večna pot 111, 1000 Ljubljana, Slovenia; (K.M.); (D.K.)
| | - Ramin Rahmani
- Department of Mechanical and Industrial Engineering, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia;
| | - Daniel Krklec
- Department of Microbiology, Biotechnical Faculty, University of Ljubljana, Večna pot 111, 1000 Ljubljana, Slovenia; (K.M.); (D.K.)
| | - Miha Brojan
- Laboratory for Nonlinear Mechanics, Faculty of Mechanical Engineering, University of Ljubljana, Aškerčeva cesta 6, 1000 Ljubljana, Slovenia;
| | - David Stopar
- Department of Microbiology, Biotechnical Faculty, University of Ljubljana, Večna pot 111, 1000 Ljubljana, Slovenia; (K.M.); (D.K.)
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15
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Population balance modeling of homogeneous viral aggregation. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2021.117035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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16
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Hofmann L, Hirsch M, Ruthstein S. Advances in Understanding of the Copper Homeostasis in Pseudomonas aeruginosa. Int J Mol Sci 2021; 22:2050. [PMID: 33669570 PMCID: PMC7922089 DOI: 10.3390/ijms22042050] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Revised: 02/10/2021] [Accepted: 02/15/2021] [Indexed: 12/12/2022] Open
Abstract
Thirty-five thousand people die as a result of more than 2.8 million antibiotic-resistant infections in the United States of America per year. Pseudomonas aeruginosa (P. aeruginosa) is classified a serious threat, the second-highest threat category of the U.S. Department of Health and Human Services. Among others, the World Health Organization (WHO) encourages the discovery and development of novel antibiotic classes with new targets and mechanisms of action without cross-resistance to existing classes. To find potential new target sites in pathogenic bacteria, such as P. aeruginosa, it is inevitable to fully understand the molecular mechanism of homeostasis, metabolism, regulation, growth, and resistances thereof. P. aeruginosa maintains a sophisticated copper defense cascade comprising three stages, resembling those of public safety organizations. These stages include copper scavenging, first responder, and second responder. Similar mechanisms are found in numerous pathogens. Here we compare the copper-dependent transcription regulators cueR and copRS of Escherichia coli (E. coli) and P. aeruginosa. Further, phylogenetic analysis and structural modelling of mexPQ-opmE reveal that this efflux pump is unlikely to be involved in the copper export of P. aeruginosa. Altogether, we present current understandings of the copper homeostasis in P. aeruginosa and potential new target sites for antimicrobial agents or a combinatorial drug regimen in the fight against multidrug resistant pathogens.
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Affiliation(s)
| | | | - Sharon Ruthstein
- Institute of Nanotechnology and Advanced Materials & Department of Chemistry, Faculty of Exact Sciences, Bar-Ilan University, Ramat-Gan 5290002, Israel; (L.H.); (M.H.)
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