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Gravina F, Dobrzanski T, Olchanheski LR, Galvão CW, Reche PM, Pileggi SA, Azevedo RA, Sadowsky MJ, Pileggi M. Metabolic Interference of sod gene mutations on catalase activity in Escherichia coli exposed to Gramoxone® (paraquat) herbicide. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2017; 139:89-96. [PMID: 28113116 DOI: 10.1016/j.ecoenv.2017.01.027] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Revised: 01/05/2017] [Accepted: 01/17/2017] [Indexed: 06/06/2023]
Abstract
Herbicides are continuously used to minimize the loss of crop productivity in agricultural environments. They can, however, cause damage by inhibiting the growth of microbiota via oxidative stress, due to the increased production of reactive oxygen species (ROS). Cellular responses to ROS involve the action of enzymes, including superoxide dismutase (SOD) and catalase (CAT). The objective of this study was to evaluate adaptive responses in Escherichia coli K-12 to paraquat, the active ingredient in the herbicide Gramoxone®. Mutant bacterial strains carrying deletions in genes encoding Mn-SOD (sodA) and Fe-SOD (sodB) were used and resulted in distinct levels of hydrogen peroxide production, interference in malondialdehyde, and viability. Mutations also resulted in different levels of interference with the activity of CAT isoenzymes and in the inactivation of Cu/Zn-SOD activity. These mutations may be responsible for metabolic differences among the evaluated strains, resulting in different patterns of antioxidative responses, depending on mutation background. While damage to the ΔsodB strain was minor at late log phase, the reverse was true at mid log phase for the ΔsodA strain. These results demonstrate the important role of these genes in defense against oxidative stress in different periods of growth. Furthermore, the lack of Cu/Zn-SOD activity in both mutant strains indicated that common metal cofactors likely interfere in SOD activity regulation. These results also indicate that E. coli K-12, a classical non-environmental strain, constitutes a model of phenotypic plasticity for adaptation to a redox-cycling herbicide through redundancy of different isoforms of SOD and CAT enzymes.
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Affiliation(s)
- Fernanda Gravina
- Departamento de Biologia Estrutural, Molecular e Genética, Universidade Estadual de Ponta Grossa, Campus Universitário de Uvaranas, Av. Carlos Cavalcanti, 4748, 84030-900 Ponta Grossa, Paraná, Brazil
| | - Tatiane Dobrzanski
- Departamento de Biologia Estrutural, Molecular e Genética, Universidade Estadual de Ponta Grossa, Campus Universitário de Uvaranas, Av. Carlos Cavalcanti, 4748, 84030-900 Ponta Grossa, Paraná, Brazil
| | - Luiz R Olchanheski
- Departamento de Microbiologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, 05508-000 São Paulo, Brazil
| | - Carolina W Galvão
- Departamento de Biologia Estrutural, Molecular e Genética, Universidade Estadual de Ponta Grossa, Campus Universitário de Uvaranas, Av. Carlos Cavalcanti, 4748, 84030-900 Ponta Grossa, Paraná, Brazil
| | - Péricles M Reche
- Departamento de Enfermagem e Saúde Pública, Universidade Estadual de Ponta Grossa, Campus Universitário de Uvaranas, Av. Carlos Cavalcanti, 4748, 84030-900 Ponta Grossa, Paraná, Brazil
| | - Sonia A Pileggi
- Departamento de Biologia Estrutural, Molecular e Genética, Universidade Estadual de Ponta Grossa, Campus Universitário de Uvaranas, Av. Carlos Cavalcanti, 4748, 84030-900 Ponta Grossa, Paraná, Brazil
| | - Ricardo A Azevedo
- Departamento de Genética, Escola Superior de Agricultura Luiz de Queiroz, Universidade de São Paulo, Av. Pádua Dias, 11, 13418-900 Piracicaba, São Paulo, Brazil
| | - Michael J Sadowsky
- Department of Soil, Water, and Climate, and The BioTechnology Institute, University of Minnesota, St. Paul, MN 55108, USA
| | - Marcos Pileggi
- Departamento de Biologia Estrutural, Molecular e Genética, Universidade Estadual de Ponta Grossa, Campus Universitário de Uvaranas, Av. Carlos Cavalcanti, 4748, 84030-900 Ponta Grossa, Paraná, Brazil.
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Podporska-Carroll J, Myles A, Quilty B, McCormack DE, Fagan R, Hinder SJ, Dionysiou DD, Pillai SC. Antibacterial properties of F-doped ZnO visible light photocatalyst. JOURNAL OF HAZARDOUS MATERIALS 2017; 324:39-47. [PMID: 26782784 DOI: 10.1016/j.jhazmat.2015.12.038] [Citation(s) in RCA: 76] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Revised: 12/04/2015] [Accepted: 12/20/2015] [Indexed: 05/14/2023]
Abstract
Nanocrystalline ZnO photocatalysts were prepared by a sol-gel method and modified with fluorine to improve their photocatalytic anti-bacterial activity in visible light. Pathogenic bacteria such as Escherichia coli (Gram-negative) and Staphylococcus aureus (Gram-positive) were employed to evaluate the antimicrobial properties of synthesized materials. The interaction with biological systems was assessed by analysis of the antibacterial properties of bacteria suspended in 2% (w/w) powder solutions. The F-doping was found to be effective against S. aureus (99.99% antibacterial activity) and E. coli (99.87% antibacterial activity) when irradiated with visible light. Production of reactive oxygen species is one of the major factors that negatively impact bacterial growth. In addition, the nanosize of the ZnO particles can also be toxic to microorganisms. The small size and high surface-to-volume ratio of the ZnO nanoparticles are believed to play a role in enhancing antimicrobial activity.
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Affiliation(s)
- Joanna Podporska-Carroll
- Center for Research in Engineering Surface Technology (CREST), DIT FOCAS Institute, Kevin St., Dublin, Ireland.
| | - Adam Myles
- Center for Research in Engineering Surface Technology (CREST), DIT FOCAS Institute, Kevin St., Dublin, Ireland; School of Chemical and Pharmaceutical Sciences, Dublin Institute of Technology, Kevin St., Dublin, Ireland
| | - Brid Quilty
- School of Biotechnology, Dublin City University, Dublin, Ireland
| | - Declan E McCormack
- Center for Research in Engineering Surface Technology (CREST), DIT FOCAS Institute, Kevin St., Dublin, Ireland; School of Chemical and Pharmaceutical Sciences, Dublin Institute of Technology, Kevin St., Dublin, Ireland
| | - Rachel Fagan
- Center for Research in Engineering Surface Technology (CREST), DIT FOCAS Institute, Kevin St., Dublin, Ireland; School of Chemical and Pharmaceutical Sciences, Dublin Institute of Technology, Kevin St., Dublin, Ireland
| | - Steven J Hinder
- The Surface Analysis Laboratory, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom
| | - Dionysios D Dionysiou
- Environmental Engineering and Science Program, Department of Biomedical, Chemical and Environmental Engineering (DBCEE), 705 Engineering Research Center, University of Cincinnati, Cincinnati, OH 45221-0012, USA.
| | - Suresh C Pillai
- Center for Research in Engineering Surface Technology (CREST), DIT FOCAS Institute, Kevin St., Dublin, Ireland; Nanotechnology Research Group, Department of Environmental Science, PEM Centre, Institute of Technology Sligo, Sligo, Ireland.
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Moussa H, Merlin C, Dezanet C, Balan L, Medjahdi G, Ben-Attia M, Schneider R. Trace amounts of Cu²⁺ ions influence ROS production and cytotoxicity of ZnO quantum dots. JOURNAL OF HAZARDOUS MATERIALS 2016; 304:532-542. [PMID: 26619052 DOI: 10.1016/j.jhazmat.2015.11.013] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Revised: 11/08/2015] [Accepted: 11/09/2015] [Indexed: 06/05/2023]
Abstract
3-Aminopropyltrimethoxysilane (APTMS) was used as ligand to prepare ZnO@APTMS, Cu(2+)-doped ZnO (ZnO:Cu@APTMS) and ZnO quantum dots (QDs) with chemisorbed Cu(2+) ions at their surface (ZnO@APTMS/Cu). The dots have a diameter of ca. 5 nm and their crystalline and phase purities and composition were established by X-ray diffraction, transmission electron microscopy, UV-visible and fluorescence spectroscopies and by X-ray photoelectron spectroscopy. The effect of Cu(2+) location on the ability of the QDs to generate reactive oxygen species (ROS) under light irradiation was investigated. Results obtained demonstrate that all dots are able to produce ROS (OH, O2(-), H2O2 and (1)O2) and that ZnO@APTMS/Cu QDs generate more OH and O2(-) radicals and H2O2 than ZnO@APTMS and ZnO:Cu@APTMS QDs probably via mechanisms associating photo-induced charge carriers and Fenton reactions. In cytotoxicity experiments conducted in the dark or under light exposure, ZnO@APTMS/Cu QDs appeared slightly more deleterious to Escherichia coli cells than the two other QDs, therefore pointing out the importance of the presence of Cu(2+) ions at the periphery of the nanocrystals. On the other hand, with the lack of photo-induced toxicity, it can be inferred that ROS production cannot explain the cytotoxicity associated to the QDs. Our study demonstrates that both the production of ROS from ZnO QDs and their toxicity may be enhanced by chemisorbed Cu(2+) ions, which could be useful for medical or photocatalytic applications.
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Affiliation(s)
- Hatem Moussa
- CNRS and Université de Lorraine, Laboratoire Réactions et Génie des Procédés (LRGP), CNRS UMR 7274, 1 rue Grandville, 54001 Nancy, France; Laboratoire de Biosurveillance de l'Environnement, Université de Carthage, Faculté des Sciences de Bizerte, 7021 Jarzouna, Bizerte, Tunisia
| | - Christophe Merlin
- CNRS and Université de Lorraine, Laboratoire de Chimie Physique et Microbiologie pour l'Environnement (LCPME), CNRS UMR 7564, 15 Avenue du Charmois, 54500 Vandœuvre-lès-Nancy, France
| | - Clément Dezanet
- CNRS and Université de Lorraine, Laboratoire Réactions et Génie des Procédés (LRGP), CNRS UMR 7274, 1 rue Grandville, 54001 Nancy, France
| | - Lavinia Balan
- Institut de Science des Matériaux de Mulhouse (IS2M), CNRS UMR 7361, 15 rue Jean Starcky, 68093 Mulhouse, France
| | - Ghouti Medjahdi
- CNRS and Université de Lorraine, Institut Jean Lamour (IJL), UMR CNRS 7198, BP 70239, 54506 Vandoeuvre-lès-Nancy Cedex, France
| | - Mossadok Ben-Attia
- Laboratoire de Biosurveillance de l'Environnement, Université de Carthage, Faculté des Sciences de Bizerte, 7021 Jarzouna, Bizerte, Tunisia
| | - Raphaël Schneider
- CNRS and Université de Lorraine, Laboratoire Réactions et Génie des Procédés (LRGP), CNRS UMR 7274, 1 rue Grandville, 54001 Nancy, France.
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Vale G, Mehennaoui K, Cambier S, Libralato G, Jomini S, Domingos RF. Manufactured nanoparticles in the aquatic environment-biochemical responses on freshwater organisms: A critical overview. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2016; 170:162-174. [PMID: 26655660 DOI: 10.1016/j.aquatox.2015.11.019] [Citation(s) in RCA: 121] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Revised: 11/16/2015] [Accepted: 11/19/2015] [Indexed: 05/02/2023]
Abstract
The enormous investments in nanotechnology have led to an exponential increase of new manufactured nano-enabled materials whose impact in the aquatic systems is still largely unknown. Ecotoxicity and nanosafety studies mostly resulted in contradictory results and generally failed to clearly identify biological patterns that could be related specifically to nanotoxicity. Generation of reactive oxygen species (ROS) is one of the most discussed nanotoxicity mechanism in literature. ROS can induce oxidative stress (OS), resulting in cyto- and genotoxicity. The ROS overproduction can trigger the induction of anti-oxidant enzymes such as catalase (CAT), superoxide dismutase (SOD) and glutathione peroxidases (GPx), which are used as biomarkers of response. A critical overview of the biochemical responses induced by the presence of NPs on freshwater organisms is performed with a strong interest on indicators of ROS and general stress. A special focus will be given to the NPs transformations, including aggregation, and dissolution, in the exposure media and the produced biochemical endpoints.
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Affiliation(s)
- Gonçalo Vale
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Torre Sul Av. Rovisco Pais, 1049-001 Lisboa, Portugal; Department of Molecular Genetics, University of Texas Southwestern Medical Center, Harry Dallas, TX 75390, USA.
| | - Kahina Mehennaoui
- Luxembourg Institute of Science and Technology, Environmental Research and Innovation (ERIN) Department, Belvaux, Luxembourg.
| | - Sebastien Cambier
- Luxembourg Institute of Science and Technology, Environmental Research and Innovation (ERIN) Department, Belvaux, Luxembourg.
| | - Giovanni Libralato
- Department of Environmental Sciences, Informatics and Statistics, University Ca' Foscari Venice, Via Torino 155, 30172, Mestre, Venice, Italy.
| | - Stéphane Jomini
- Laboratoire Interdisciplinaire des Environements Continentaux (LIEC), Université de Lorraine, UMR 7360, Campus Bridoux rue du Général Delestraint, 57070 Metz, France.
| | - Rute F Domingos
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Torre Sul Av. Rovisco Pais, 1049-001 Lisboa, Portugal; Institut de Physique du Globe de Paris, Sorbonne Paris Cité, UMR CNRS 7154, Université Paris Diderot, 75205 Paris Cedex 05, France.
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Tong T, Wilke CM, Wu J, Binh CTT, Kelly JJ, Gaillard JF, Gray KA. Combined Toxicity of Nano-ZnO and Nano-TiO2: From Single- to Multinanomaterial Systems. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2015; 49:8113-23. [PMID: 26070110 DOI: 10.1021/acs.est.5b02148] [Citation(s) in RCA: 85] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Previous studies on the toxicity of engineered nanomaterials (ENMs) have been primarily based on testing individual ENMs, so little is known about the interactions and combined toxicity of multiple ENMs. In this study the toxicity of chemically stable nano-TiO2 and soluble nano-ZnO was investigated individually and in combination, by monitoring bacterial cell membrane integrity and ATP levels in a natural aqueous medium (Lake Michigan water). Both nano-TiO2 and nano-ZnO damage bacterial cell membranes under simulated solar irradiation (SSI), but their phototoxicity is not additive. Nano-ZnO at 1 mg/L, for example, surprisingly eliminates the damaging effect of nano-TiO2 at 10 mg/L. This phenomenon does not correlate with reactive oxygen species production, but is explained by a reduced extent of bacteria/nano-TiO2 contact in the presence of both nano-ZnO and dissolved zinc. The presence of nano-ZnO also exerts a significant decrease in bacterial ATP levels both under SSI and in the dark, a stress effect not captured by measuring bacterial cell membrane integrity. This inhibitory effect of nano-ZnO, however, is reduced somewhat by nano-TiO2 due to the adsorption of Zn(2+). Therefore, our results reveal that nanoparticle interactions and surface complexation reactions alter the original toxicity of individual nanoparticles and that comprehensive assessments of potential ENM toxicity in the environment require careful integration of complex physicochemical interactions between ENMs and various biological responses.
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Affiliation(s)
- Tiezheng Tong
- †Department of Civil and Environmental Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Carolyn M Wilke
- †Department of Civil and Environmental Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Jinsong Wu
- ‡Department of Materials Science and Engineering, NUANCE Center, Northwestern University, Evanston, Illinois 60208, United States
| | - Chu Thi Thanh Binh
- §Department of Biology, Loyola University Chicago, 1032 West Sheridan Road, Chicago, Illinois 60660, United States
| | - John J Kelly
- §Department of Biology, Loyola University Chicago, 1032 West Sheridan Road, Chicago, Illinois 60660, United States
| | - Jean-François Gaillard
- †Department of Civil and Environmental Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Kimberly A Gray
- †Department of Civil and Environmental Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
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Qureshi A, Pandey A, Chouhan RS, Gurbuz Y, Niazi JH. Whole-cell based label-free capacitive biosensor for rapid nanosize-dependent toxicity detection. Biosens Bioelectron 2014; 67:100-6. [PMID: 25088079 DOI: 10.1016/j.bios.2014.07.038] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2014] [Revised: 07/16/2014] [Accepted: 07/17/2014] [Indexed: 11/28/2022]
Abstract
Despite intensive studies on examining the toxicity of nanomaterials (NMs), our current understanding on potential toxicity in relation to size and cellular responses has remained limited. In this work, we have developed a whole-cell based capacitive biosensor (WCB) to determine the biological toxicity of nanoparticles (NPs) using iron oxide (Fe3O4) NPs as models. This WCB chip comprised of an array of capacitor sensors made of gold interdigitated microelectrodes on which living Escherichia coli cells were immobilized. Cells-on-chip was then allowed to interact with different sizes of Fe3O4 NPs (5, 20 and 100 nm) and concentration-depended cellular-responses were measured in terms of change in dielectric properties (capacitance) as a function of applied AC frequency. The WCB response showed smaller-sized Fe3O4 NPs (5 nm) induced maximum change in surface capacitance because of their effective cellular interaction with E. coli cells-on-chip indicating that the cells suffered from severe cellular deformation, which was confirmed by scanning electron microscopic (SEM) examination. Further our results were validated through their cell viability and E. coli responses at the interface of cell-membrane and NPs as a proof-of-concept. WCB response showed a size-dependent shift in maximum response level from 2 µg/ml of 5 nm sized NPs to 4 µg/ml with NP-sizes greater than 20 nm. The developed WCB offered real-time, label-free and noninvasive detection of cellular responses against Fe3O4 NPs' toxicity with speed, simplicity and sensitivity that can be extended to toxicity screening of various other NPs.
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Affiliation(s)
- Anjum Qureshi
- Sabanci University Nanotechnology Research and Application Center, Orta Mah., 34956 Istanbul, Turkey.
| | - Ashish Pandey
- Sabanci University Nanotechnology Research and Application Center, Orta Mah., 34956 Istanbul, Turkey; Faculty of Engineering and Natural Sciences, Sabanci University Orhanli, 34956 Istanbul, Turkey
| | - Raghuraj S Chouhan
- Sabanci University Nanotechnology Research and Application Center, Orta Mah., 34956 Istanbul, Turkey
| | - Yasar Gurbuz
- Faculty of Engineering and Natural Sciences, Sabanci University Orhanli, 34956 Istanbul, Turkey
| | - Javed H Niazi
- Sabanci University Nanotechnology Research and Application Center, Orta Mah., 34956 Istanbul, Turkey.
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