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Wang X, Li F, Teng Y, Ji C, Wu H. Characterization of oxidative damage induced by nanoparticles via mechanism-driven machine learning approaches. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 871:162103. [PMID: 36764549 DOI: 10.1016/j.scitotenv.2023.162103] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 01/19/2023] [Accepted: 02/04/2023] [Indexed: 06/18/2023]
Abstract
The wide application of TiO2-based engineered nanoparticles (nTiO2) inevitably led to release into aquatic ecosystems. Importantly, increasing studies have emphasized the high risks of nTiO2 to coastal environments. Bivalves, the representative benthic filter feeders in coastal zones, acted as important roles to assess and monitor the toxic effects of nanoparticles. Oxidative damage was one of the main toxic mechanisms of nTiO2 on bivalves, but the experimental variables/nanomaterial characteristics were diverse and the toxicity mechanism was complex. Therefore, it was very necessary to develop machine learning model to characterize and predict the potential toxicity. In this study, thirty-six machine learning models were built by nanodescriptors combined with six machine learning algorithms. Among them, random forest (RF) - catalase (CAT), k-neighbors classifier (KNN) - glutathione peroxidase (GPx), neural networks - multilayer perceptron (ANN) - glutathione s-transferase (GST), random forest (RF) - malondialdehyde (MDA), random forest (RF) - reactive oxygen species (ROS), and extreme gradient boosting decision tree (XGB) - superoxide dismutase (SOD) models performed good with high accuracy and balanced accuracy for both training sets and external validation sets. Furthermore, the best model revealed the predominant factors (exposure concentration, exposure periods, and exposure matrix) influencing the oxidative stress induced by nTiO2. These results showed that high exposure concentrations and short exposure-intervals tended to cause oxidative damage to bivalves. In addition, gills and digestive glands could be vulnerable to nTiO2-induced oxidative damage as tissues/organs differences were the important factors controlling MDA activity. This study provided insights into important nano-features responsible for the different indicators of oxidative stress and thereby extended the application of machine learning approaches in toxicological assessment for nanoparticles.
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Affiliation(s)
- Xiaoqing Wang
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences (CAS), Shandong Key Laboratory of Coastal Environmental Processes, YICCAS, Yantai 264003, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Fei Li
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences (CAS), Shandong Key Laboratory of Coastal Environmental Processes, YICCAS, Yantai 264003, PR China; Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, PR China.
| | - Yuefa Teng
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences (CAS), Shandong Key Laboratory of Coastal Environmental Processes, YICCAS, Yantai 264003, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Chenglong Ji
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences (CAS), Shandong Key Laboratory of Coastal Environmental Processes, YICCAS, Yantai 264003, PR China; Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, PR China
| | - Huifeng Wu
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences (CAS), Shandong Key Laboratory of Coastal Environmental Processes, YICCAS, Yantai 264003, PR China; Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, PR China
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2
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Fu H, Yaniv V, Betzalel Y, Mamane H, Gray KA. Creating anti-viral high-touch surfaces using photocatalytic transparent films. CHEMOSPHERE 2023; 323:138280. [PMID: 36868422 DOI: 10.1016/j.chemosphere.2023.138280] [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: 01/08/2023] [Revised: 02/27/2023] [Accepted: 02/28/2023] [Indexed: 06/18/2023]
Abstract
Antimicrobial and self-cleaning surface coatings are promising tools to combat the growing global threat of infectious diseases and related healthcare-associated infections (HAIs). Although many engineered TiO2-based coating technologies are reporting antibacterial performance, the antiviral performance of these coatings has not been explored. Furthermore, previous studies have underscored the importance of the "transparency" of the coating for surfaces such as the touch screens of medical devices. Hence, in this study, we fabricated a variety of nanoscale TiO2-based transparent thin films (anatase TiO2, anatase/rutile mixed phase TiO2, silver-anatase TiO2 composite, and carbon nanotube-anatase TiO2 composite) via dipping and airbrush spray coating technologies and evaluated their antiviral performance (Bacteriophage MS2 as the model) under dark and illuminated conditions. The thin films showed high surface coverage (ranging from 40 to 85%), low surface roughness (maximum average roughness 70 nm), super-hydrophilicity (water contact angle 6-38.4°), and high transparency (70-80% transmittance under visible light). Antiviral performance of the coatings revealed that silver-anatase TiO2 composite (nAg/nTiO2) coated samples achieved the highest antiviral efficacy (5-6 log reduction) while the other TiO2 coated samples showed fair antiviral results (1.5-3.5 log reduction) after 90 min LED irradiation at 365 nm. Those findings indicate that TiO2-based composite coatings are effective in creating antiviral high-touch surfaces with the potential to control infectious diseases and HAIs.
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Affiliation(s)
- Han Fu
- Department of Civil and Environmental Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Vered Yaniv
- Water Technologies Laboratory, Faculty of Engineering, Tel Aviv University, Tel Aviv, 69978, Israel
| | - Yifaat Betzalel
- Water Technologies Laboratory, Faculty of Engineering, Tel Aviv University, Tel Aviv, 69978, Israel
| | - Hadas Mamane
- School of Mechanical Engineering, Faculty of Engineering, Tel-Aviv University, Tel Aviv, 69978, Israel.
| | - Kimberly A Gray
- Department of Civil and Environmental Engineering, Northwestern University, Evanston, IL, 60208, USA.
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3
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Zhang X, Hou X, Ma L, Shi Y, Zhang D, Qu K. Analytical methods for assessing antimicrobial activity of nanomaterials in complex media: advances, challenges, and perspectives. J Nanobiotechnology 2023; 21:97. [PMID: 36941596 PMCID: PMC10026445 DOI: 10.1186/s12951-023-01851-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Accepted: 03/07/2023] [Indexed: 03/23/2023] Open
Abstract
Assessing the antimicrobial activity of engineered nanomaterials (ENMs), especially in realistic scenarios, is of great significance for both basic research and applications. Multiple analytical methods are available for analysis via off-line or on-line measurements. Real-world samples are often complex with inorganic and organic components, which complicates the measurements of microbial viability and/or metabolic activity. This article highlights the recent advances achieved in analytical methods including typical applications and specifics regarding their accuracy, cost, efficiency, and user-friendliness. Methodological drawbacks, technique gaps, and future perspectives are also discussed. This review aims to help researchers select suitable methods for gaining insight into antimicrobial activities of targeted ENMs in artificial and natural complex matrices.
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Affiliation(s)
- Xuzhi Zhang
- Laboratory for Marine Fisheries Science and Food Production Processes, Pilot National Laboratory for Marine Science and Technology, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071, China
| | - Xiangyi Hou
- School of Marine Ecology and Environment, Shanghai Ocean University, Shanghai, 201306, China
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China
| | - Liangyu Ma
- Laboratory for Marine Fisheries Science and Food Production Processes, Pilot National Laboratory for Marine Science and Technology, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071, China
| | - Yaqi Shi
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China
| | - Dahai Zhang
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China.
| | - Keming Qu
- Laboratory for Marine Fisheries Science and Food Production Processes, Pilot National Laboratory for Marine Science and Technology, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071, China.
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Shang C, Bu J, Song C. Preparation, Antimicrobial Properties under Different Light Sources, Mechanisms and Applications of TiO 2: A Review. MATERIALS (BASEL, SWITZERLAND) 2022; 15:ma15175820. [PMID: 36079203 PMCID: PMC9457460 DOI: 10.3390/ma15175820] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 08/05/2022] [Accepted: 08/06/2022] [Indexed: 05/27/2023]
Abstract
Traditional antimicrobial methods, such as antibiotics and disinfectants, may cause adverse effects, such as bacterial resistance and allergic reactions. Photocatalysts based on titanium dioxide (TiO2) have shown great potential in the field of antimicrobials because of their high efficiency, lack of pollution, and lack of side effects. This paper focuses on the antimicrobial activity of TiO2 under different light sources. To improve the photocatalytic efficiency of TiO2, we can reduce electron-hole recombination and extend the photocatalytic activity to the visible light region by doping with different ions or compounds and compounding with polymers. We can also improve the surface properties of materials, increase the contact area with microorganisms, and further enhance the resistance to microorganisms. In addition, we also reviewed their main synthesis methods, related mechanisms, and main application fields to provide new ideas for the enhancement of photocatalytic microorganism performance and application popularization in the future.
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5
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Li H, Chang F, Li Z, Cui F. The Role of Extracellular Polymeric Substances in the Toxicity Response of Anaerobic Granule Sludge to Different Metal Oxide Nanoparticles. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19095371. [PMID: 35564766 PMCID: PMC9100327 DOI: 10.3390/ijerph19095371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 04/15/2022] [Accepted: 04/18/2022] [Indexed: 11/17/2022]
Abstract
Wastewater treatment plants (WWTP) are regarded as the last barriers for the release of incompletely separated and recycled nanoparticles (NPs) into the environment. Despite the importance and ubiquity of microbial extracellular polymeric substances (EPSs) in the complex wastewater matrix, the interaction between NPs and EPSs of anaerobic microflora involved in wastewater treatment and the resultant impact on the biomass metabolomics are unclear. Thus, the impacts of different metal oxide (TiO2, ZnO, and CuO) NPs on functional bacteria in anaerobic granular sludge (AGS) and the possible toxicity mechanisms were investigated. In particular, the binding quality, enhanced resistance mechanism, and chemical fractional contribution of EPSs from AGS against the nanotoxicity of different NPs was assessed. The results showed that CuO NPs caused the most severe inhibition towards acetoclastic and hydrogenotrophic methanogens, followed by ZnO NPs, whereas TiO2 NPs caused no inhibition to methanogenesis. Excessive EPS production, especially the protein-like substances, was an effective strategy for reducing certain NPs’ toxicity by immobilizing NPs away from AGS cells, whereas the metabolism restriction on inner microorganisms of AGS induced by CuO NPs can deteriorate the protective role of EPS, indicating that the roles of EPS may not be amenable to generalizations. Further investigations with lactate dehydrogenase (LDH) and reactive oxygen species (ROS) assays indicated that there are greatly essential differences between the toxicity mechanisms of metal NPs to AGS, which varied depending on the NPs’ type and dosage. In addition, dynamic changes in the responses of EPS content to different NPs can result in a significant shift in methanogenic and acidogenic microbial communities. Thus, the production and composition of EPSs will be a key factor in determining the fate and potential effect of NPs in the complex biological matrix. In conclusion, this study broadens the understanding of the inhibition mechanisms of metal oxide NPs on the AGS process, and the influence of EPSs on the fate, behavior, and toxicity of NPs.
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Affiliation(s)
- Huiting Li
- Tianjin Research Institute for Water Transport Engineering, M. O. T, Tianjin 300000, China; (H.L.); (F.C.); (Z.L.)
| | - Fang Chang
- Tianjin Research Institute for Water Transport Engineering, M. O. T, Tianjin 300000, China; (H.L.); (F.C.); (Z.L.)
| | - Zhendong Li
- Tianjin Research Institute for Water Transport Engineering, M. O. T, Tianjin 300000, China; (H.L.); (F.C.); (Z.L.)
| | - Fuyi Cui
- College of Environment and Ecology, Chongqing University, Chongqing 400045, China
- Correspondence:
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6
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Syngouna VI, Kourtaki KI, Georgopoulou MP, Chrysikopoulos CV. The role of nanoparticles (titanium dioxide, graphene oxide) on the inactivation of co-existing bacteria in the presence and absence of quartz sand. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:19199-19211. [PMID: 34709550 DOI: 10.1007/s11356-021-17086-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Accepted: 10/13/2021] [Indexed: 06/13/2023]
Abstract
The increased mass production and application of engineered nanomaterials (ENMs) have resulted in the release of nanoparticles (NPs) in the environment, raising uncertainties regarding their environmental impacts. This study examines the effect of graphene oxide (GO) and titanium dioxide (TiO2) NPs on the inactivation of the three model bacteria originated by mammalians including humans: Escherichia (E.) coli, Enterococcus (E.) faecalis, and Staphylococcus (S.) aureus. A series of dynamic batch experiments were conducted at constant room temperature (22 °C) in order to examine the inactivation of co-existing bacteria by NPs, in the presence and absence of quartz sand. The inactivation experimental data were satisfactorily fitted with a pseudo-first order expression with a time dependent rate coefficient. The inactivation of E. coli and S. aureus was shown to increase in the co-presence of GO or TiO2 NPs and quartz sand comparing with the presence of GO or TiO2 NPs alone. For E. faecalis, no clear trend was observed. Moreover, quartz sand was shown to affect inactivation of bacteria by GO and TiO2 NPs. Among the bacteria examined, the highest inactivation rates were observed for S. aureus.
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Affiliation(s)
- Vasiliki I Syngouna
- School of Chemical and Environmental Engineering, Technical University of Crete, 73100, Chania, Greece.
- Department of Environment, Ionian University, 29100, Zakynthos, Greece.
| | - Kleanthi I Kourtaki
- School of Chemical and Environmental Engineering, Technical University of Crete, 73100, Chania, Greece
| | - Maria P Georgopoulou
- School of Chemical and Environmental Engineering, Technical University of Crete, 73100, Chania, Greece
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7
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Fu H, Gray KA. TiO 2 (Core)/Crumpled Graphene Oxide (Shell) Nanocomposites Show Enhanced Photodegradation of Carbamazepine. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:2087. [PMID: 34443917 PMCID: PMC8401461 DOI: 10.3390/nano11082087] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 08/10/2021] [Accepted: 08/12/2021] [Indexed: 11/16/2022]
Abstract
The presence of pharmaceuticals and personal care products (PPCPs) in aquatic systems is a serious threat to human and ecological health. The photocatalytic degradation of PPCPs via titanium oxide (TiO2) is a well-researched potential solution, but its efficacy is limited by a variety of environmental conditions, such as the presence of natural organic macromolecules (NOM). In this study, we investigate the synthesis and performance of a novel photoreactive composite: a three-dimensional (3D) core (TiO2)-shell (crumpled graphene oxide) composite (TiGC) used as a powerful tool for PPCP removal and degradation in complex aqueous environments. TiGC exhibited a high adsorption capacity (maximum capacity 11.2 mg/g, 100 times larger than bare TiO2) and a 30% enhancement of photodegradation (compared to bare TiO2) in experiments with a persistent PPCP model, carbamazepine (CBZ). Furthermore, the TiGC performance was tested under various conditions of NOM concentration, light intensity, CBZ initial concentration, and multiple cycles of CBZ addition, in order to illustrate that TiGC performance is stable over a range of field conditions (including NOM). The enhanced and stable performance of TiCG to adsorb and degrade CBZ in water extends from its core-shell composite nanostructure: the crumpled graphene oxide shell provides an adsorptive surface that favors CBZ sorption over NOM, and optical and electronic interactions between TiO2 and graphene oxide result in higher hydroxyl radical (•OH) yields than bare TiO2.
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Affiliation(s)
| | - Kimberly A. Gray
- Department of Civil and Environmental Engineering, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA;
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8
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Lu Y, Zhang H, Wang H, Ma N, Sun T, Cui B. Humic acid mediated toxicity of faceted TiO 2 nanocrystals to Daphnia magna. JOURNAL OF HAZARDOUS MATERIALS 2021; 416:126112. [PMID: 34492909 DOI: 10.1016/j.jhazmat.2021.126112] [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: 11/26/2020] [Revised: 03/29/2021] [Accepted: 05/11/2021] [Indexed: 06/13/2023]
Abstract
Nano-bio interface is of great importance in dictating the interaction between the nanomaterials and biological system and thus the toxicity to aquatic organisms. Herein, two specific faceted TiO2 nanocrystals, {101} and {001} facet, were exposed to Daphnia magna to explore facet-dependent toxicological responses in aquatic environment. Due to the different influences on oxidative stress process, the half-maximal effective concentration (EC50) value of {001} TiO2 (1.27 g L-1) to D. magna was less than that of {101} TiO2 (1.68 g L-1). Suwannee river humic acid (SRHA) could significantly reduce the oxidative stress responses of TiO2 nanocrystals and thus alleviate their toxicities to D. magna in aquatic environment. The protective effect of SRHA against TiO2 toxicity exhibited a facet-dependent manner. Compared to {101} TiO2, a more obvious detoxification effect was observed for {001} TiO2. The high SRHA concentration could endow both faceted TiO2 nanocrystals with a similar toxicity due to the formation of SRHA-corona on TiO2 surface. This facet-affected toxicity of nanomaterials in aquatic environment would provide us new insights in predicting the exposure risk of nanomaterials in nature waters.
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Affiliation(s)
- Yi Lu
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China; School of Fisheries and Life Science, Dalian Ocean University, Dalian 116023, China
| | - Hui Zhang
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China.
| | - Hua Wang
- School of Fisheries and Life Science, Dalian Ocean University, Dalian 116023, China
| | - Ning Ma
- Beijing Key Laboratory of Water Environmental and Ecological Technology for River Basins, Beijing Water Science and Technology Institute, Beijing 100048, China
| | - Tao Sun
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Baoshan Cui
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China.
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Wu S, Gaillard JF, Gray KA. The impacts of metal-based engineered nanomaterial mixtures on microbial systems: A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 780:146496. [PMID: 34030287 DOI: 10.1016/j.scitotenv.2021.146496] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 02/23/2021] [Accepted: 03/11/2021] [Indexed: 05/24/2023]
Abstract
The last decade has witnessed tremendous growth in the commercial use of metal-based engineered nanomaterials (ENMs) for a wide range of products and processes. Consequently, direct and indirect release into environmental systems may no longer be considered negligible or insignificant. Yet, there is an active debate as to whether there are real risks to human or ecological health with environmental exposure to ENMs. Previous research has focused primarily on the acute effects of individual ENMs using pure cultures under controlled laboratory environments, which may not accurately reveal the ecological impacts of ENMs under real environmental conditions. The goal of this review is to assess our current understanding of ENM effects as we move from exposure of single to multiple ENMs or microbial species. For instance, are ENMs' impacts on microbial communities predicted by their intrinsic physical or chemical characteristics or their effects on single microbial populations; how do chronic ENM interactions compare to acute toxicity; does behavior under simplified laboratory conditions reflect that in environmental media; finally, is biological stress modified by interactions in ENM mixtures relative to that of individual ENM? This review summarizes key findings and our evolving understanding of the ecological effects of ENMs under complex environmental conditions on microbial systems, identifies the gaps in our current knowledge, and indicates the direction of future research.
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Affiliation(s)
- Shushan Wu
- Department of Civil and Environmental Engineering, Northwestern University, USA.
| | | | - Kimberly A Gray
- Department of Civil and Environmental Engineering, Northwestern University, USA.
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10
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Pagnout C, Razafitianamaharavo A, Sohm B, Caillet C, Beaussart A, Delatour E, Bihannic I, Offroy M, Duval JFL. Osmotic stress and vesiculation as key mechanisms controlling bacterial sensitivity and resistance to TiO 2 nanoparticles. Commun Biol 2021; 4:678. [PMID: 34083706 PMCID: PMC8175758 DOI: 10.1038/s42003-021-02213-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Accepted: 05/11/2021] [Indexed: 02/04/2023] Open
Abstract
Toxicity mechanisms of metal oxide nanoparticles towards bacteria and underlying roles of membrane composition are still debated. Herein, the response of lipopolysaccharide-truncated Escherichia coli K12 mutants to TiO2 nanoparticles (TiO2NPs, exposure in dark) is addressed at the molecular, single cell, and population levels by transcriptomics, fluorescence assays, cell nanomechanics and electrohydrodynamics. We show that outer core-free lipopolysaccharides featuring intact inner core increase cell sensitivity to TiO2NPs. TiO2NPs operate as membrane strippers, which induce osmotic stress, inactivate cell osmoregulation and initiate lipid peroxidation, which ultimately leads to genesis of membrane vesicles. In itself, truncation of lipopolysaccharide inner core triggers membrane permeabilization/depolarization, lipid peroxidation and hypervesiculation. In turn, it favors the regulation of TiO2NP-mediated changes in cell Turgor stress and leads to efficient vesicle-facilitated release of damaged membrane components. Remarkably, vesicles further act as electrostatic baits for TiO2NPs, thereby mitigating TiO2NPs toxicity. Altogether, we highlight antagonistic lipopolysaccharide-dependent bacterial responses to nanoparticles and we show that the destabilized membrane can generate unexpected resistance phenotype.
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Affiliation(s)
| | | | | | | | | | - Eva Delatour
- Université de Lorraine, CNRS, LIEC, Metz, France
| | | | - Marc Offroy
- Université de Lorraine, CNRS, LIEC, Nancy, France
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11
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Metryka O, Wasilkowski D, Nowak A, Adamczyk-Habrajska M, Mrozik A. Impact of an Engineered Copper-Titanium Dioxide Nanocomposite and Parent Substrates on the Bacteria Viability, Antioxidant Enzymes and Fatty Acid Profiling. Int J Mol Sci 2020; 21:E9089. [PMID: 33260385 PMCID: PMC7731063 DOI: 10.3390/ijms21239089] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 11/12/2020] [Accepted: 11/27/2020] [Indexed: 11/25/2022] Open
Abstract
Due to the systematic increase in the production of nanomaterials (NMs) and their applications in many areas of life, issues associated with their toxicity are inevitable. In particular, the performance of heterogeneous NMs, such as nanocomposites (NCs), is unpredictable as they may inherit the properties of their individual components. Therefore, the purpose of this work was to assess the biological activity of newly synthesized Cu/TiO2-NC and the parent nanoparticle substrates Cu-NPs and TiO2-NPs on the bacterial viability, antioxidant potential and fatty acid composition of the reference Escherichia coli and Bacillus subtilis strains. Based on the toxicological parameters, it was found that B. subtilis was more sensitive to NMs than E. coli. Furthermore, Cu/TiO2-NC and Cu-NPs had an opposite effect on both strains, while TiO2-NPs had a comparable mode of action. Simultaneously, the tested strains exhibited varied responses of the antioxidant enzymes after exposure to the NMs, with Cu-NPs having the strongest impact on their activity. The most considerable alternations in the fatty acid profiles were found after the bacteria were exposed to Cu/TiO2-NC and Cu-NPs. Microscopic images indicated distinct interactions of the NMs with the bacterial outer layers, especially in regard to B. subtilis. Cu/TiO2-NC generally proved to have less distinctive antimicrobial properties on B. subtilis than E. coli compared to its parent components. Presumably, the biocidal effects of the tested NMs can be attributed to the induction of oxidative stress, the release of metal ions and specific electrochemical interactions with the bacterial cells.
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Affiliation(s)
- Oliwia Metryka
- Doctoral School, University of Silesia, Bankowa 14, 40-032 Katowice, Poland
| | - Daniel Wasilkowski
- Institute of Biology, Biotechnology and Environmental Protection, Faculty of Natural Sciences, University of Silesia, Jagiellońska 28, 40-032 Katowice, Poland;
| | - Anna Nowak
- Institute of Nuclear Physics, Polish Academy of Sciences, PL-31342 Kraków, Poland;
| | - Małgorzata Adamczyk-Habrajska
- Institute of Materials Engineering, Faculty of Science and Technology, University of Silesia, Żytnia 12, 41-200 Sosnowiec, Poland;
| | - Agnieszka Mrozik
- Institute of Biology, Biotechnology and Environmental Protection, Faculty of Natural Sciences, University of Silesia, Jagiellońska 28, 40-032 Katowice, Poland;
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12
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Delgado LP, Figueroa-Torres MZ, Ceballos-Chuc MC, García-Rodríguez R, Alvarado-Gil JJ, Oskam G, Rodriguez-Gattorno G. "Tailoring the TiO 2 phases through microwave-assisted hydrothermal synthesis: Comparative assessment of bactericidal activity". MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 117:111290. [PMID: 32919651 DOI: 10.1016/j.msec.2020.111290] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Revised: 06/26/2020] [Accepted: 07/12/2020] [Indexed: 11/15/2022]
Abstract
Nanocrystalline titania (TiO2) is one of the most investigated crystalline nanostructured systems in the field of materials science. The technological applications of this material are related to its optoelectronic and photocatalytic properties, which in turn are strongly dependent on the crystal phase (i.e., anatase, brookite, and rutile), particle size, and surface structure. However, systematic comparative studies of all its crystal phases are scarce in literature due to difficulties in providing a controlled synthesis, which is primarily important in obtaining the brookite phase. In this report, the synthesis of TiO2 nanoparticles in the anatase, brookite, and rutile structures was explored, using amorphous TiO2 as a common precursor under microwave-assisted hydrothermal conditions. The influence of parameters such as temperature, acidity, and precursor concentration on phase crystallization were investigated. The TiO2 materials (amorphous and crystalline phases as well as commercial Degussa P25) were systematically characterized using Raman spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, UV-visible reflectance spectroscopy, and dynamic and electrophoretic light scattering. The bactericidal activity and photocatalytic antibacterial effectiveness of each material were evaluated through the determination of the minimum inhibitory and bactericidal concentrations, and via the mortality kinetic method under ultraviolet (UV) illumination under similar conditions with two bacterial groups of unique cellular structures: Gram-negative Escherichia coli (E. coli) and Gram-positive Staphylococcus aureus (S. aureus). The results are discussed with particular emphasis on the relationship between the synthesis parameters (acidity, precursor concentration, temperature and reaction time) and the bactericidal properties.
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Affiliation(s)
- L P Delgado
- Departamento de Física Aplicada, CINVESTAV-I. P. N., Cordemex, 97310 Mérida, Yucatán, Mexico
| | - M Z Figueroa-Torres
- Universidad Autónoma de Nuevo León, Facultad de Ingeniería Civil-IIC, San Nicolás de Los Garza, Nuevo León 66455, Mexico
| | - M C Ceballos-Chuc
- Departamento de Física Aplicada, CINVESTAV-I. P. N., Cordemex, 97310 Mérida, Yucatán, Mexico
| | - R García-Rodríguez
- Departamento de Física Aplicada, CINVESTAV-I. P. N., Cordemex, 97310 Mérida, Yucatán, Mexico
| | - J J Alvarado-Gil
- Departamento de Física Aplicada, CINVESTAV-I. P. N., Cordemex, 97310 Mérida, Yucatán, Mexico
| | - G Oskam
- Departamento de Física Aplicada, CINVESTAV-I. P. N., Cordemex, 97310 Mérida, Yucatán, Mexico
| | - G Rodriguez-Gattorno
- Departamento de Física Aplicada, CINVESTAV-I. P. N., Cordemex, 97310 Mérida, Yucatán, Mexico.
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13
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Treatment of Produced Water with Photocatalysis: Recent Advances, Affecting Factors and Future Research Prospects. Catalysts 2020. [DOI: 10.3390/catal10080924] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Produced water is the largest byproduct of oil and gas production. Due to the complexity of produced water, especially dissolved petroleum hydrocarbons and high salinity, efficient water treatment technologies are required prior to beneficial use of such waste streams. Photocatalysis has been demonstrated to be effective at degrading recalcitrant organic contaminants, however, there is limited understanding about its application to treating produced water that has a complex and highly variable water composition. Therefore, the determination of the appropriate photocatalysis technique and the operating parameters are critical to achieve the maximum removal of recalcitrant compounds at the lowest cost. The objective of this review is to examine the feasibility of photocatalysis-involved treatment for the removal of contaminants in produced water. Recent studies revealed that photocatalysis was effective at decomposing recalcitrant organic compounds but not for mineralization. The factors affecting decontamination and strategies to improve photocatalysis efficiency are discussed. Further, recent developments and future research prospects on photocatalysis-derived systems for produced water treatment are addressed. Photocatalysis is proposed to be combined with other treatment processes, such as biological treatments, to partially reduce total organic carbon, break down macromolecular organic compounds, increase biodegradability, and reduce the toxicity of produced water.
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14
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A decoloration/recoloration cycling-associated photo-stimulated fuel cell to assess potential health risks caused by TiO2 nanoparticles and tris(hydroxymethyl)aminomethane. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2020.114126] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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15
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Antimicrobial food packaging based on sustainable Bio-based materials for reducing foodborne Pathogens: A review. Food Chem 2020; 310:125915. [DOI: 10.1016/j.foodchem.2019.125915] [Citation(s) in RCA: 184] [Impact Index Per Article: 46.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 10/28/2019] [Accepted: 11/14/2019] [Indexed: 12/14/2022]
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16
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Fabrication & Characterization of Chitosan Coated Biologically Synthesized TiO2 Nanoparticles against PDR E. coli of Veterinary Origin. ADVANCES IN POLYMER TECHNOLOGY 2020. [DOI: 10.1155/2020/8456024] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Treatment of pandrug resistant (PDR) Escherichia coli strain is the leading causative agent of bovine mastitis worldwide. Hence, becoming a potential threat to veterinary and public health. Therefore, to control the infection new nontoxic, biocompatible antimicrobial formulation with enhanced antibacterial activity is massively required. Current study was planned to synthesize chitosan coated titanium dioxide nanoparticles (CS-NPs coated TiO2). Coating was being done by chitosan nanoparticles (CS-NPs) using ionic gelation method. Aqueous solution of Moringa concanensis leaf extract was used to synthesize titanium dioxide nanoparticles (TiO2 NPs). The synthesized nanoformulations were characterized by using XRD, SEM, and FTIR. X-ray diffraction (XRD) analysis indicated the crystalline phase of TiO2 NPs and CS-NPs coated TiO2 NPs. Scanning Electron Microscopy (SEM) confirmed spherical shaped nanoparticles size of chitosan NPs ranging from 19–25 nm and TiO2 NPs 35–50 nm. Thesize of CS-NPs coated TiO2 NPs was in the range of 65–75 nm. The UV-Vis Spectra and band gap values illustrated the red shift in CS-NPs coated TiO2 NPs. Fourier transform infrared (FTIR) spectroscopy confirmed the linkages between TiO2 NPs and chitosan biopolymer, Zeta potential confirmed the stability of CS-NPs coated TiO2 NPs by showing 95 mV peak value. In-vitro antibacterial activity of CS-NPs coated TiO2 NPs and Uncoated TiO2 NPs was evaluated by disc diffusion method against PDR strain of E. coli isolated from mastitic milk samples. The antibacterial activity of all the synthesized nanoformulations were noted and highest antibacterial activity was shown by CS-NPs coated TiO2-NPs against pandrug resistant (PDR) E. coli strain with the prominent zone of inhibition of 23 mm. Morphological changes of E. coli cells after the treatment with MIC concentration (0.78 μg/ml) of CS-NPs coated TiO2 NPs were studied by transmission electron microscopy TEM showedrigorous morphological defectand has distorted the general appearance of the E. coli cells. Cytotoxicity (HepG2 cell line) and hemolytic (human blood) studies confirmed nontoxic/biocompatible nature of CS-NPs coated biologically synthesized TiO2 NPs. The results suggested that biologically synthesized and surface modified TiO2 NPs by mucoadhesive polysaccharides (e.g. chitosan) coating would be an effective and non-toxic alternative therapeutic agent to be used in livestock industry to control drug resistant veterinary pathogens.
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17
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Li X, Ma Q, Liu T, Dong Z, Fan W. Effect of TiO2-nanoparticles on copper toxicity to bacteria: role of bacterial surface. RSC Adv 2020; 10:5058-5065. [PMID: 35498301 PMCID: PMC9049159 DOI: 10.1039/c9ra08270k] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Accepted: 01/04/2020] [Indexed: 11/21/2022] Open
Abstract
The impact of titanium dioxide nanoparticles (nano-TiO2) on the aquatic environment is an important issue due to their increasing application. Although nano-TiO2 was reported to show an effect on heavy metal toxicity to aquatic organisms, the underlying mechanism is not well understood. In this study, two bacterial species (Bacillus thuringiensis (B. thuringiensis) and Bacillus megaterium (B. megaterium)) from sediment were selected to study the effects of nano-TiO2 on copper toxicity. Nano-TiO2 was found to inhibit the growth of B. thuringiensis and enhance the oxidative stress damage caused by copper, whereas these effects were not observed for B. megaterium. Transmission electron microscopy and flow cytometry showed that B. thuringiensis has stronger association ability to nano-TiO2 than B. megaterium. The existence of the S-layer on the surface of B. thuringiensis might be the possible reason, leading to the difference in copper toxicity. This indicates that the characteristics of bacterial surfaces might be important to the toxicity responses of nanoparticles. Different surface characteristics of bacteria, for example, S-layer or exopolysaccharides, might lead to different effects of nanomaterials on metal toxicity.![]()
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Affiliation(s)
- Xiaomin Li
- School of Space and Environment
- Beihang University
- Beijing 100191
- P. R. China
| | - Qingquan Ma
- School of Space and Environment
- Beihang University
- Beijing 100191
- P. R. China
| | - Tong Liu
- School of Space and Environment
- Beihang University
- Beijing 100191
- P. R. China
| | - Zhaomin Dong
- School of Space and Environment
- Beihang University
- Beijing 100191
- P. R. China
- Beijing Advanced Innovation Center for Big Data-Based Precision Medicine
| | - Wenhong Fan
- School of Space and Environment
- Beihang University
- Beijing 100191
- P. R. China
- Beijing Advanced Innovation Center for Big Data-Based Precision Medicine
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18
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Guo MT, Tian XB. Impacts on antibiotic-resistant bacteria and their horizontal gene transfer by graphene-based TiO 2&Ag composite photocatalysts under solar irradiation. JOURNAL OF HAZARDOUS MATERIALS 2019; 380:120877. [PMID: 31330386 DOI: 10.1016/j.jhazmat.2019.120877] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 06/28/2019] [Accepted: 07/06/2019] [Indexed: 06/10/2023]
Abstract
In recent years, photocatalysis has been considered as a promising method, which provides measures to environmental pollution. Antibiotic resistant bacteria (ARB) and their antibiotic resistance genes (ARGs), as the emerging environmental pollutants, are released into the environment, resulting in antibiotic resistance spread. TiO2-based nanocomposites, as the most common photocatalytic material, may influence ARB and ARGs under photocatalytic conditions. However, the research on this aspect is rare. A novel nanocomposite synthesized from Ag, TiO2 and graphene oxide (GO), was selected as a representative of nanomaterials for investigation. The experimental results indicated that TiO2/Ag/GO nanocomposites significantly affected ARB vitality. 100 mg/L TiO2/Ag/GO will reduce bacterial survival to 12.2% in 10 min under simulated sunlight irradiation. Chloramphenicol as the most representative antibiotic in the water, reduces the effect of ARB inactivation under photocatalytic conditions. The addition of TiO2/Ag/GO could affect tetracycline antibiotic resistance. The level of bacterial tolerance to tetracycline had a significant reduction. The horizontal gene transfer was promoted from 1 to 2 folds with the addition of TiO2/Ag/GO. Even high TiO2/Ag/GO concentration (100 mg/L) sample had a limited promotion, suggesting that TiO2/Ag/GO will not increase the risk of antibiotic resistance spread compared to other nano materials.
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Affiliation(s)
- Mei-Ting Guo
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, 200092, Shanghai, China.
| | - Xiao-Bo Tian
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, 200092, Shanghai, China
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19
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Abo‐zeid Y, Williams GR. The potential anti‐infective applications of metal oxide nanoparticles: A systematic review. WILEY INTERDISCIPLINARY REVIEWS-NANOMEDICINE AND NANOBIOTECHNOLOGY 2019; 12:e1592. [DOI: 10.1002/wnan.1592] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2019] [Revised: 09/01/2019] [Accepted: 09/04/2019] [Indexed: 12/13/2022]
Affiliation(s)
- Yasmin Abo‐zeid
- School of Pharmacy Helwan University Cairo Egypt
- UCL School of Pharmacy University College London London UK
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20
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Monteiro R, Costa S, Coppola F, Freitas R, Vale C, Pereira E. Evidences of metabolic alterations and cellular damage in mussels after short pulses of Ti contamination. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 650:987-995. [PMID: 30308873 DOI: 10.1016/j.scitotenv.2018.08.314] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Revised: 08/22/2018] [Accepted: 08/23/2018] [Indexed: 06/08/2023]
Abstract
Mytilus galloprovincialis mussels were exposed to seawater contaminated with Ti. Initial concentrations were 4.1, 32, and 66 μg L-1 that declined during the first 24 h of the experiments, and after 48 h values were <2 μg L-1. Experiments were run in triplicate, under constant salinity and temperature. Mussels were fed every two days, and water renewed every seven days and Ti concentrations re-stabilized. During the first 28 days of experimental period, mussels were exposed to four short pulses of contamination, followed by few days of low Ti concentration between weekly contamination renewals. Then mussels were exposed to additional 14-day exposure to Ti uncontaminated seawater. Only residual Ti concentrations were measured in mussels' whole soft tissue after the four pulses of Ti contamination, indicating low Ti accumulation by the organisms. Nevertheless, the biomarkers related to mussels' metabolic capacity (electron transport system activity, ETS), oxidative damage (lipid peroxidation, LPO and reduced glutathione content, GSH), and defense mechanisms (antioxidant and biotransformation enzymes) evidenced the impact of Ti during the 28 days of experimental period. The biomarkers that better indicated the recovery of mussels' biochemical performance were the ETS, LPO, GSH, and the antioxidant enzyme glutathione peroxidase (GPx). LPO was the prime indicator among the analyzed biochemical responses. Organisms appear to hold coping mechanisms to lower the damage induced by Ti, and to recover, albeit the 14 days period of exposure to uncontaminated seawater following the four Ti pulses were not enough for full recovery, as evidenced by results on LPO levels and GSH concentrations. Despite the low solubility of Ti in seawater, the toxicity of this element to a model marine organism was demonstrated.
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Affiliation(s)
- Rui Monteiro
- Departamento de Química & CESAM, Universidade de Aveiro, 3810-193 Aveiro, Portugal; CIIMAR, Universidade do Porto, 4050-123 Porto, Portugal
| | - Silvana Costa
- Departamento de Biologia & CESAM, Universidade de Aveiro, 3810-193 Aveiro, Portugal
| | - Francesca Coppola
- Departamento de Biologia & CESAM, Universidade de Aveiro, 3810-193 Aveiro, Portugal
| | - Rosa Freitas
- Departamento de Biologia & CESAM, Universidade de Aveiro, 3810-193 Aveiro, Portugal.
| | - Carlos Vale
- CIIMAR, Universidade do Porto, 4050-123 Porto, Portugal
| | - Eduarda Pereira
- Departamento de Química & CESAM, Universidade de Aveiro, 3810-193 Aveiro, Portugal
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21
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Monteiro R, Costa S, Coppola F, Freitas R, Vale C, Pereira E. Toxicity beyond accumulation of Titanium after exposure of Mytilus galloprovincialis to spiked seawater. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 244:845-854. [PMID: 30390458 DOI: 10.1016/j.envpol.2018.10.035] [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: 07/19/2018] [Revised: 10/02/2018] [Accepted: 10/05/2018] [Indexed: 05/06/2023]
Abstract
Mytilus galloprovincialis was exposed to seawater spiked with 5, 50 and 100 μg L-1 of Titanium (Ti) for 14 days. Seawater was renewed after 96 h and new addition of Ti was done. A parallel experiment conducted in the absence of mussels showed that during the first 24 h after spiking, Ti concentrations in seawater rapidly decreased to values below 2 μg L-1. For this reason, along the entire experimental period (14 days) mussels were exposed to Ti during two short periods, in the beginning of the experiment and after seawater renewal. At 96 h, mussels exhibited low Ti concentrations (<2.5 μg g-1), close or not significantly different from a control condition (1.6 μg g-1 in the absence of Ti). Despite the low accumulated Ti in mussels' tissues after both experimental periods (96 h and 14 days), biochemical markers indicated that mussels developed two main strategies: reduction of their metabolic capacity to avoid the uptake of Ti, and antioxidant and biotransformation defense mechanisms, such as the activation of SOD, CAT, GPx and GSTs enzymes that were triggered to prevent cellular damages. Nevertheless, oxidative stress occurred after 96 h or 14 days. The current study highlights that alterations of biological activity of M. galloprovincialis exposed to Ti goes beyond its accumulation in tissues.
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Affiliation(s)
- Rui Monteiro
- Departamento de Química & CESAM, Universidade de Aveiro, 3810-193, Aveiro, Portugal; CIIMAR, Universidade do Porto, 4450-208, Matosinhos, Portugal
| | - Silvana Costa
- Departamento de Biologia & CESAM, Universidade de Aveiro, 3810-193, Aveiro, Portugal
| | - Francesca Coppola
- Departamento de Biologia & CESAM, Universidade de Aveiro, 3810-193, Aveiro, Portugal
| | - Rosa Freitas
- Departamento de Biologia & CESAM, Universidade de Aveiro, 3810-193, Aveiro, Portugal.
| | - Carlos Vale
- CIIMAR, Universidade do Porto, 4450-208, Matosinhos, Portugal
| | - Eduarda Pereira
- Departamento de Química & CESAM, Universidade de Aveiro, 3810-193, Aveiro, Portugal
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22
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Hou J, Wang L, Wang C, Zhang S, Liu H, Li S, Wang X. Toxicity and mechanisms of action of titanium dioxide nanoparticles in living organisms. J Environ Sci (China) 2019; 75:40-53. [PMID: 30473306 DOI: 10.1016/j.jes.2018.06.010] [Citation(s) in RCA: 139] [Impact Index Per Article: 27.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2017] [Revised: 06/13/2018] [Accepted: 06/14/2018] [Indexed: 05/26/2023]
Abstract
Titanium dioxide nanoparticles (TiO2 NPs) are one of the most widely used nanomaterials in the consumer products, agriculture, and energy sectors. Their large demand and widespread applications will inevitably cause damage to organisms and ecosystems. A better understanding of TiO2 NP toxicity in living organisms may promote risk assessment and safe use practices of these nanomaterials. This review summarizes the toxic effects of TiO2 NPs on multiple taxa of microorganisms, algae, plants, invertebrates, and vertebrates. The mechanism of TiO2 NP toxicity to organisms can be outlined in three aspects: The Reactive Oxygen Species (ROS) produced by TiO2 NPs following the induction of electron-hole pairs; cell wall damage and lipid peroxidation of the cell membrane caused by NP-cell attachment by electrostatic force owing to the large surface area of TiO2 NPs; and TiO2 NP attachment to intracellular organelles and biological macromolecules following damage to the cell membranes.
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Affiliation(s)
- Jing Hou
- College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China.
| | - Luyao Wang
- College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China
| | - Chunjie Wang
- College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China
| | - Songlin Zhang
- College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China
| | - Haiqiang Liu
- College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China
| | - Shiguo Li
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
| | - Xiangke Wang
- College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China.
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23
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Won Y, Schwartzenberg K, Gray KA. TiO 2-based transparent coatings create self-cleaning surfaces. CHEMOSPHERE 2018; 208:899-906. [PMID: 30068033 DOI: 10.1016/j.chemosphere.2018.06.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Revised: 06/01/2018] [Accepted: 06/02/2018] [Indexed: 06/08/2023]
Abstract
Implementation of self-cleaning surfaces is gaining attention as a tool to combat the healthcare associated infections (HAIs). In this study, we prepared TiO2-based transparent coatings as one such potential self-cleaning surface for touchscreen application and evaluated their antimicrobial efficacy under dark and illuminated conditions. To maintain high transparency and TiO2 coverage, clean borosilicate glass slides were dip-coated multiple times in a suspension of TiO2-based materials at a low concentration. The as-prepared samples were tested for their roughness and hydrophilicity via atomic force microscopy (AFM) and contact angle analysis, respectively. To screen the antimicrobial performance of the TiO2 coated samples, the number and viability of attached bacteria on the film surfaces were recorded after submerging them in a bacterial suspension for 45 min under dark or ultraviolet (UV) illuminated conditions. The antimicrobial performance of the commercially available regular and Ag-coated antimicrobial Corning® Gorilla® Glass were also evaluated under the same conditions and compared with those of the TiO2 coated samples. Among the test samples, n-Ag/TiO2 (<100 nm) coated samples achieved greater than 80% bactericidal efficacy with the lowest bacterial attachment after the UV exposure. TiO2-based transparent coatings show promise as an effective tool against bacterial attachment and displays greater bactericidal activity in comparison to commercial antibacterial glass.
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Affiliation(s)
- Yechan Won
- Department of Civil and Environmental Engineering, Northwestern University, Evanston, IL 60208-3109, USA
| | - Kevin Schwartzenberg
- Department of Civil and Environmental Engineering, Northwestern University, Evanston, IL 60208-3109, USA
| | - Kimberly A Gray
- Department of Civil and Environmental Engineering, Northwestern University, Evanston, IL 60208-3109, USA.
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24
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Lebedev A, Anariba F, Tan JC, Li X, Wu P. A review of physiochemical and photocatalytic properties of metal oxides against Escherichia coli. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2018.04.013] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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25
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Richter JW, Shull GM, Fountain JH, Guo Z, Musselman LP, Fiumera AC, Mahler GJ. Titanium dioxide nanoparticle exposure alters metabolic homeostasis in a cell culture model of the intestinal epithelium and Drosophila melanogaster. Nanotoxicology 2018; 12:390-406. [PMID: 29600885 DOI: 10.1080/17435390.2018.1457189] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Nanosized titanium dioxide (TiO2) is a common additive in food and cosmetic products. The goal of this study was to investigate if TiO2 nanoparticles affect intestinal epithelial tissues, normal intestinal function, or metabolic homeostasis using in vitro and in vivo methods. An in vitro model of intestinal epithelial tissue was created by seeding co-cultures of Caco-2 and HT29-MTX cells on a Transwell permeable support. These experiments were repeated with monolayers that had been cultured with the beneficial commensal bacteria Lactobacillus rhamnosus GG (L. rhamnosus). Glucose uptake and transport in the presence of TiO2 nanoparticles was assessed using fluorescent glucose analog 2-(N-(7-nitrobenz-2-oxa-1,3-diazol-4-yl)amino)-2-deoxyglucose (2-NBDG). When the cell monolayers were exposed to physiologically relevant doses of TiO2, a statistically significant reduction in glucose transport was observed. These differences in glucose absorption were eliminated in the presence of beneficial bacteria. The decrease in glucose absorption was caused by damage to intestinal microvilli, which decreased the surface area available for absorption. Damage to microvilli was ameliorated in the presence of L. rhamnosus. Complimentary studies in Drosophila melanogaster showed that TiO2 ingestion resulted in decreased body size and glucose content. The results suggest that TiO2 nanoparticles alter glucose transport across the intestinal epithelium, and that TiO2 nanoparticle ingestion may have physiological consequences.
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Affiliation(s)
- Jonathan W Richter
- a Department of Biomedical Engineering , Binghamton University , Binghamton , NY , USA
| | - Gabriella M Shull
- a Department of Biomedical Engineering , Binghamton University , Binghamton , NY , USA
| | - John H Fountain
- b Department of Biological Sciences , Binghamton University , Binghamton , NY , USA
| | - Zhongyuan Guo
- a Department of Biomedical Engineering , Binghamton University , Binghamton , NY , USA
| | - Laura P Musselman
- b Department of Biological Sciences , Binghamton University , Binghamton , NY , USA
| | - Anthony C Fiumera
- b Department of Biological Sciences , Binghamton University , Binghamton , NY , USA
| | - Gretchen J Mahler
- a Department of Biomedical Engineering , Binghamton University , Binghamton , NY , USA
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26
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Wilke CM, Wunderlich B, Gaillard JF, Gray KA. Synergistic Bacterial Stress Results from Exposure to Nano-Ag and Nano-TiO 2 Mixtures under Light in Environmental Media. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:3185-3194. [PMID: 29393629 DOI: 10.1021/acs.est.7b05629] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Due to their widespread use and subsequent release, engineered nanomaterials (ENMs) will create complex mixtures and emergent systems in the natural environment where their chemical interactions may cause toxic stress to microorganisms. We previously showed that under dark conditions n-TiO2 attenuated bacterial stress caused by low concentrations of n-Ag (<20 μg L-1) due to Ag+ adsorption, yet, since both n-Ag and n-TiO2 are photoactive, their photochemistries may play a key role in their interactions. In this work, we study the chemical interactions of n-Ag and n-TiO2 mixtures in a natural aqueous medium under simulated solar irradiation to investigate photoinduced stress. Using ATP levels and cell membrane integrity as probes, we observe that n-Ag and n-TiO2 together exert synergistic toxic stress in Escherichia coli. We find increased production of hydrogen peroxide by the n-Ag/n-TiO2 mixture, revealing that the enhanced photocatalytic activity and production of ROS likely contribute to the stress response observed. Based on STEM-EDS evidence, we propose that a new composite Ag/TiO2 nanomaterial forms under these conditions and explains the synergistic effects of the ENM mixture. Overall, this work reveals that environmental transformations of ENM mixtures under irradiation can enhance biological stress beyond that of individual components.
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Affiliation(s)
- Carolyn M Wilke
- Department of Civil and Environmental Engineering , Northwestern University , 2145 Sheridan Road , Evanston , Illinois 60208 , United States
| | - Bettina Wunderlich
- Department of Civil and Environmental Engineering , Northwestern University , 2145 Sheridan Road , Evanston , Illinois 60208 , 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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27
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Zhu B, Xia X, Zhang S, Tang Y. Attenuation of bacterial cytotoxicity of carbon nanotubes by riverine suspended solids in water. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2018; 234:581-589. [PMID: 29223815 DOI: 10.1016/j.envpol.2017.11.086] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2017] [Revised: 11/23/2017] [Accepted: 11/27/2017] [Indexed: 06/07/2023]
Abstract
The impact of solid particles on ecotoxicity of nanomaterials in water environments is poorly understood. This study investigated the effect of natural riverine suspended solids (SPS) on the cytotoxicity of single-walled carbon nanotubes (SWCNTs) towards a bacterium, Ochrobactrum sp. in water. Compared with SWCNT suspension without SPS, the presence of SPS at different concentrations ranging from 20 to 400 mg L-1 markedly increased the survival rates of bacteria exposed to 50 mg L-1 SWCNTs and bacterial survival rates increased with SPS concentrations by a power law. Sedimentation experiments and field emission scanning electron microscopy revealed the occurrence of heteroaggregation between SWCNTs and SPS, probably responsible for the reduced SWCNT toxicity. Furthermore, the extended Derjaguin-Landau-Verwey-Overbeek (ExDLVO) calculation showed the mitigated toxicity might also result from the decreased SWCNT-bacterium interaction energy with the increased SPS concentrations and the stronger SPS-SWCNT interaction than the SWCNT-bacterium interaction. This work provides new insights into our understanding of environmental hazards of engineered nanomaterials in aquatic systems.
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Affiliation(s)
- Baotong Zhu
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Xinghui Xia
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China.
| | - Sibo Zhang
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Yuchen Tang
- Department of Civil Engineering, University of Bristol, Bristol BS82AA, United Kingdom
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28
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Londono N, Donovan AR, Shi H, Geisler M, Liang Y. Impact of TiO 2 and ZnO nanoparticles on an aquatic microbial community: effect at environmentally relevant concentrations. Nanotoxicology 2017; 11:1140-1156. [PMID: 29125011 DOI: 10.1080/17435390.2017.1401141] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
To investigate effects of engineered nanoparticles (ENPs) at environmentally relevant concentrations to aquatic microbial communities, TiO2 at 700 µg/L and ZnO at 70 µg/L were spiked to river water samples either separately or combined. Compared to controls where no ENPs were added, the addition of TiO2 ENPs alone at the tested concentration had no statistically significant effect on both the bacterial and eukaryotic communities. The presence of added ENPs: ZnO or ZnO + TiO2 led to significant shift of the microbial community structure and genus distribution. This shift was more obvious for the bacteria than the eukaryotes. Based on results from single particle - inductively coupled plasma - mass spectrometry (SP-ICP-MS), all ENPs aggregated rapidly in water and resulted in much larger particles sizes than the original counterparts. "Dissolved" (including particles smaller than the size detection limits and dissolved ions) concentrations of Ti and Zn increased, too in treatment groups vs. the controls.
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Affiliation(s)
- Nathalia Londono
- a Department of Civil and Environmental Engineering , Southern Illinois University , Carbondale , IL , USA
| | - Ariel R Donovan
- b Department of Chemistry , Missouri University of Science and Technology , Rolla , MO , USA
| | - Honglan Shi
- b Department of Chemistry , Missouri University of Science and Technology , Rolla , MO , USA.,c Center for Single Nanoparticle, Single Cell, and Single Molecule Monitoring (CS3M) , Rolla , MO , USA
| | - Matthew Geisler
- d Department of Plant Biology , Life Science II, Southern Illinois University , Carbondale , IL , USA
| | - Yanna Liang
- a Department of Civil and Environmental Engineering , Southern Illinois University , Carbondale , IL , USA.,e Department of Environmental and Sustainable Engineering , University at Albany, State University of New York , Albany , NY , USA
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Wang L, Lu Y, Yang C, Chen C, Huang W, Dang Z. Effects of Cd(II) on the stability of humic acid-coated nano-TiO 2 particles in aquatic environments. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:23144-23152. [PMID: 28828557 DOI: 10.1007/s11356-017-9905-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2017] [Accepted: 08/03/2017] [Indexed: 06/07/2023]
Abstract
The stability of nanoparticles (NPs) in aquatic environments is important to evaluate their adverse effects on aquatic ecosystems and human health. Nanoparticle stability is known to be influenced by coexisting ions and dissolved organic matter. This study was designed to investigate the effects of coexisting low-level Cd(II) on the stability of humic acid-coated nano-TiO2 (HA-TiO2) particles in aquatic environments by measuring their aggregation kinetics through time-resolved dynamic light scattering (DLS) and monitoring suspended HA-TiO2 concentrations via optical absorbance changes over time. The particles exhibited aggregation behavior consistent with the classic Derjaguin-Landau-Verwey-Overbeek (DLVO) theory. The results showed that Cd(II) concentration, pH, and ionic strength had various effects on the aggregation kinetics of the HA-TiO2 NPs. The HA-TiO2 particles aggregated faster as the Cd(II) concentration increased whereas the stability of the nanoparticles increased as the solution pH increased or ionic strength decreased regardless of the Cd(II) concentration. At the fixed pH and ionic strength conditions, the addition of Cd(II) promoted aggregation of nanoparticles, leading to higher attachment efficiencies. The enhanced aggregation of the HA-TiO2 NPs in the presence of coexisting cadmium ions in aqueous solutions indicated that the fate and transport of nanoparticles could be greatly affected by heavy metals in aquatic environments.
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Affiliation(s)
- Li Wang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
| | - Yixin Lu
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
| | - Chen Yang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China.
| | - Chengyu Chen
- Department of Environmental Sciences, Rutgers, The State University of New Jersey, New Brunswick, NJ, 08901, USA
| | - Weilin Huang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
- Department of Environmental Sciences, Rutgers, The State University of New Jersey, New Brunswick, NJ, 08901, USA
| | - Zhi Dang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
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Aderibigbe BA. Metal-Based Nanoparticles for the Treatment of Infectious Diseases. Molecules 2017; 22:E1370. [PMID: 28820471 PMCID: PMC6152252 DOI: 10.3390/molecules22081370] [Citation(s) in RCA: 135] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Accepted: 08/15/2017] [Indexed: 11/16/2022] Open
Abstract
Infectious diseases can be transmitted and they cause a significant burden on public health globally. They are the greatest world killers and it is estimated that they are responsible for the demise of over 17 million people annually. The impact of these diseases is greater in the developing countries. People with compromised immune systems and children are the most affected. Infectious diseases may be caused by bacteria, viruses, and protozoa. The treatment of infectious diseases is hampered by simultaneous resistance to multiple drugs, indicating that there is a serious and pressing need to develop new therapeutics that can overcome drug resistance. This review will focus on the recent reports of metal-based nanoparticles that are potential therapeutics for the treatment of infectious diseases and their biological efficacy (in vitro and in vivo).
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Affiliation(s)
- Blessing Atim Aderibigbe
- Department of Chemistry, University of Fort Hare, Alice Campus, Eastern Cape 5700, South Africa.
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31
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Zhou Z, Tang X, Dai W, Shi J, Chen H. Nano-QSAR models for predicting cytotoxicity of metal oxide nanoparticles (MONPs) to E. coli. CAN J CHEM 2017. [DOI: 10.1139/cjc-2017-0172] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Nanotechnology has been applied to many aspects of human life. Meanwhile, concerns regarding the toxicity of engineered nanomaterials to the environment have also been growing. Herein, an economic and convenient approach based on quantitative structure–activity relationship for nanomaterials (nano-QSAR) was proposed to evaluate the cytotoxicity of metal oxide nanoparticles (MONPs) to E. coli. Six molecular descriptors of 17 MONPs were selected and calculated using Gaussian98 software and DFT-B3LYP method on the LANL2DZ basis set. Two multivariable models, linear and nonlinear, were built based on the calculated molecular descriptors using multiple linear regression (MLR) and support vector machine (SVM) methods, respectively. Results demonstrated that both models presented high reliability, good predictive performance, and fine generalization ability, with all R2 values greater than 0.84. It was also revealed that the lowest unoccupied molecular orbital (LUMO) and molar heat capacity (Cp) were the two key descriptors influencing the cytotoxicity of MONPs.
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Affiliation(s)
- Zhengwei Zhou
- School of Environmental & Safety Engineering, Changzhou University, Changzhou 213164, Jiangsu, China
- School of Environmental & Safety Engineering, Changzhou University, Changzhou 213164, Jiangsu, China
| | - Xinwen Tang
- School of Environmental & Safety Engineering, Changzhou University, Changzhou 213164, Jiangsu, China
- School of Environmental & Safety Engineering, Changzhou University, Changzhou 213164, Jiangsu, China
| | - Wen Dai
- School of Environmental & Safety Engineering, Changzhou University, Changzhou 213164, Jiangsu, China
- School of Environmental & Safety Engineering, Changzhou University, Changzhou 213164, Jiangsu, China
| | - Jingjie Shi
- School of Environmental & Safety Engineering, Changzhou University, Changzhou 213164, Jiangsu, China
- School of Environmental & Safety Engineering, Changzhou University, Changzhou 213164, Jiangsu, China
| | - Haiqun Chen
- School of Environmental & Safety Engineering, Changzhou University, Changzhou 213164, Jiangsu, China
- School of Environmental & Safety Engineering, Changzhou University, Changzhou 213164, Jiangsu, China
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32
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Barrick A, Châtel A, Bruneau M, Mouneyrac C. The role of high-throughput screening in ecotoxicology and engineered nanomaterials. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2017; 36:1704-1714. [PMID: 28440957 DOI: 10.1002/etc.3811] [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: 12/13/2016] [Revised: 01/20/2017] [Accepted: 03/27/2017] [Indexed: 06/07/2023]
Abstract
The field of environmental toxicology developed as a result of growing concerns about anthropogenic influences on the environment and how to ameliorate ecological impact. Many governmental bodies are beginning to emphasize prevention rather than mitigation when addressing novel products, leading to more of a focus on identifying potential toxicity prior to release. With the exponential advances in their development and sale, novel metamaterials and biotechnology are set to dramatically outpace the capabilities of current testing strategies. To address the need for a fast, cost-effective means of testing chemicals, high-throughput screening (HTS) is currently being used in toxicology and being adapted to ecotoxicology in projects such as ToxCast and Tox21. Despite the growth of research using HTS platforms, its role in ecotoxicology is still uncertain, particularly in how it should be applied in regulation. The aim of the present review is to discuss common test strategies used in designing HTS platforms, the current potential applications for ecotoxicological research, its role in regulatory policies, and its ability to address growing concerns such as engineered nanomaterials. Environ Toxicol Chem 2017;36:1704-1714. © 2017 SETAC.
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Affiliation(s)
- Andrew Barrick
- Mer Molécules Sante, Université Catholique de l'Ouest, Angers Cedex, France
| | - Amélie Châtel
- Mer Molécules Sante, Université Catholique de l'Ouest, Angers Cedex, France
| | - Mélanie Bruneau
- Mer Molécules Sante, Université Catholique de l'Ouest, Angers Cedex, France
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Huang G, Ng TW, An T, Li G, Wang B, Wu D, Yip HY, Zhao H, Wong PK. Interaction between bacterial cell membranes and nano-TiO 2 revealed by two-dimensional FTIR correlation spectroscopy using bacterial ghost as a model cell envelope. WATER RESEARCH 2017; 118:104-113. [PMID: 28414961 DOI: 10.1016/j.watres.2017.04.023] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Revised: 04/04/2017] [Accepted: 04/08/2017] [Indexed: 05/28/2023]
Abstract
The interaction between microorganisms and nanoparticles is a crucial step towards understanding the subsequent biological effect. In this study, the interaction between TiO2 nanoparticles and bacterial cell membrane was investigated by Two-dimensional Correlation Fourier Transformation Infrared spectroscopy (2D-FTIR-COS) using bacterial ghosts (BGs), which are non-living bacterial cell envelopes devoid of cytoplasm. The synchronous map of 2D-FTIR-COS results indicated that the functionalities in proteins of BGs preferentially interacted with TiO2 nanoparticles; whereas the interaction of TiO2 nanoparticles with characteristic functionality in polysaccharides (COH) and phospholipids (PO) were very weak or insensitive. This conclusion was further corroborated by settling of TiO2 nanoparticles in the presence of pure protein, polysaccharide and phospholipid represented by bovine serum albumin (BSA), alginate and phosphatidylethanolamine (PE). Additionally, the asynchronous map of 2D-FTIR-COS indicated a sequential order of functionalities bonded to TiO2 nanoparticles with the order of: COO- > aromatic CC stretching > NH, amide II > CO, ketone. These findings contribute to deeper understanding of the interaction between TiO2 nanoparticles and bacterial cell membrane in aquatic systems.
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Affiliation(s)
- Guocheng Huang
- School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China
| | - Tsz Wai Ng
- School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China
| | - Taicheng An
- Institute of Environmental Health and Pollution Control, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, China.
| | - Guiying Li
- Institute of Environmental Health and Pollution Control, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, China
| | - Bo Wang
- School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China
| | - Dan Wu
- School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China
| | - Ho Yin Yip
- School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China
| | - Huijun Zhao
- Centre for Clean Environment and Energy, Griffith Scholl of Environment, Griffith University, Queensland, 4222, Australia; Laboratory of Nanomaterials and Nanostructures, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, Anhui, China
| | - Po Keung Wong
- School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China.
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34
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Li H, Cui F, Liu Z, Li D. Transport, fate, and long-term impacts of metal oxide nanoparticles on the stability of an anaerobic methanogenic system with anaerobic granular sludge. BIORESOURCE TECHNOLOGY 2017; 234:448-455. [PMID: 28347965 DOI: 10.1016/j.biortech.2017.03.027] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2016] [Revised: 02/27/2017] [Accepted: 03/05/2017] [Indexed: 06/06/2023]
Abstract
The fate and long-term effect of different metal oxide (TiO2, CuO and ZnO) nanoparticles (NPs) on anaerobic granular sludge (AGS) was evaluated in an anaerobic methanogenic system. Operation stability and structural characteristics of the granules were compared, the metabolism changes in the microbial community were quantified, and NPs fate were investigated. CuO NPs had greatest toxic effect on AGS after extended exposure, whereas ZnO NPs benefited methanogenesis temporarily (no more than 5d). The inhibition on AGS caused by NPs varied due to the unique structure of AGS and different toxic mechanism. Structural changes of AGS provided new evidence that tested NPs have different toxicity.
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Affiliation(s)
- Huiting Li
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Fuyi Cui
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
| | - Zhiquan Liu
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Dapeng Li
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
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35
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Qiu TA, Meyer BM, Christenson KG, Klaper RD, Haynes CL. A mechanistic study of TiO 2 nanoparticle toxicity on Shewanella oneidensis MR-1 with UV-containing simulated solar irradiation: Bacterial growth, riboflavin secretion, and gene expression. CHEMOSPHERE 2017; 168:1158-1168. [PMID: 27823777 DOI: 10.1016/j.chemosphere.2016.10.085] [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: 07/26/2016] [Revised: 10/14/2016] [Accepted: 10/22/2016] [Indexed: 06/06/2023]
Abstract
Toxicity of nanomaterials to ecological systems has recently emerged as an important field of research, and thus, many researchers are exploring the mechanisms of how nanoparticles impact organisms. Herein, we probe the mechanisms of bacteria-nanoparticle interaction by investigating how TiO2 nanoparticles impact a model organism, the metal-reducing bacterium Shewanella oneidensis MR-1. In addition to examining the effect of TiO2 exposure, the effect of synergistic simulated solar irradiation containing UV was explored in this study, as TiO2 nanoparticles are known photocatalysts. The data reveal that TiO2 nanoparticles cause an inhibition of S. oneidensis growth at high dosage without compromising cell viability, yet co-exposure of nanoparticles and illumination does not increase the adverse effects on bacterial growth relative to TiO2 alone. Measurements of intracellular reactive oxygen species and riboflavin secretion, on the same nanoparticle-exposed bacteria, reveal that TiO2 nanoparticles have no effect on these cell functions, but application of UV-containing illumination with TiO2 nanoparticles has an impact on the level of riboflavin outside bacterial cells. Finally, gene expression studies were employed to explore how cells respond to TiO2 nanoparticles and illumination, and these results were correlated with cell growth and cell function assessment. Together these data suggest a minimal impact of TiO2 NPs and simulated solar irradiation containing UV on S. oneidensis MR-1, and the minimal impact could be accounted for by the nutrient-rich medium used in this work. These measurements demonstrate a comprehensive scheme combining various analytical tools to enable a mechanistic understanding of nanoparticle-cell interactions and to evaluate the potential adverse effects of nanoparticles beyond viability/growth considerations.
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Affiliation(s)
- Tian A Qiu
- Department of Chemistry, University of Minnesota, 207 Pleasant St SE, Minneapolis, MN 55455, United States
| | - Ben M Meyer
- Department of Chemistry, University of Minnesota, 207 Pleasant St SE, Minneapolis, MN 55455, United States
| | - Ky G Christenson
- Department of Chemistry, University of Minnesota, 207 Pleasant St SE, Minneapolis, MN 55455, United States
| | - Rebecca D Klaper
- School of Freshwater Sciences, University of Wisconsin Milwaukee, 600 E. Greenfield Ave, Milwaukee, WI 53204, United States
| | - Christy L Haynes
- Department of Chemistry, University of Minnesota, 207 Pleasant St SE, Minneapolis, MN 55455, United States.
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36
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Friehs E, AlSalka Y, Jonczyk R, Lavrentieva A, Jochums A, Walter JG, Stahl F, Scheper T, Bahnemann D. Toxicity, phototoxicity and biocidal activity of nanoparticles employed in photocatalysis. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS 2016. [DOI: 10.1016/j.jphotochemrev.2016.09.001] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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37
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Fan W, Peng R, Li X, Ren J, Liu T, Wang X. Effect of titanium dioxide nanoparticles on copper toxicity to Daphnia magna in water: Role of organic matter. WATER RESEARCH 2016; 105:129-137. [PMID: 27611640 DOI: 10.1016/j.watres.2016.08.060] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2016] [Revised: 08/16/2016] [Accepted: 08/28/2016] [Indexed: 05/29/2023]
Abstract
Inevitably released into natural water, titanium dioxide nanoparticles (nano-TiO2) may affect the toxicity of other contaminants. Ubiquitous organic matter (OM) may influence their combined toxicity, which has been rarely reported. This study investigated the effect of nano-TiO2 on Cu toxicity to Daphnia magna and the role of OM (dissolved or particle surface bound) in inducing combined effects. The effect of nano-TiO2 on heavy metal accumulation depended on the adsorption capacity for heavy metals of nano-TiO2 and the uptake of nano-TiO2-metal complexes by organisms. Nano-TiO2 significantly decreased Cu accumulation in D. magna, but the reducing effect of nano-TiO2 was eliminated in the presence of humic acid (HA, a model OM). In the Cu and HA solution, nano-TiO2 slightly affected the bioavailability of Cu2+ and Cu-HA complexes and thus slightly influenced Cu toxicity. The nanoparticle surface-bound HA reduced the effect of nano-TiO2 on the speciation of the accumulated Cu; therefore, the combined effects of nano-TiO2 and Cu on biomarkers similarly weakened. HA-altered Cu speciation may be the main factor responsible for the influence of HA on the combined effects of nano-TiO2 and Cu. This study provides insights into the combined effects of nano-TiO2 and heavy metals in natural water.
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Affiliation(s)
- Wenhong Fan
- Department of Environmental Science and Engineering, School of Space and Environment, Beihang University, Beijing 100191, PR China.
| | - Ruishuang Peng
- Department of Environmental Science and Engineering, School of Space and Environment, Beihang University, Beijing 100191, PR China
| | - Xiaomin Li
- Department of Environmental Science and Engineering, School of Space and Environment, Beihang University, Beijing 100191, PR China
| | - Jinqian Ren
- Department of Environmental Science and Engineering, School of Space and Environment, Beihang University, Beijing 100191, PR China
| | - Tong Liu
- Department of Environmental Science and Engineering, School of Space and Environment, Beihang University, Beijing 100191, PR China
| | - Xiangrui Wang
- Department of Environmental Science and Engineering, School of Space and Environment, Beihang University, Beijing 100191, PR China
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38
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Caballero-Díaz E, Valcárcel Cases M. Analytical methodologies for nanotoxicity assessment. Trends Analyt Chem 2016. [DOI: 10.1016/j.trac.2016.03.007] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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39
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Fan W, Liu T, Li X, Peng R, Zhang Y. Nano-TiO 2 affects Cu speciation, extracellular enzyme activity, and bacterial communities in sediments. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2016; 218:77-85. [PMID: 27552040 DOI: 10.1016/j.envpol.2016.08.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Revised: 08/01/2016] [Accepted: 08/04/2016] [Indexed: 06/06/2023]
Abstract
In aquatic ecosystems, titanium dioxide nanoparticles (nano-TiO2) coexist with heavy metals and influence the existing forms and toxicities of the metal in water. However, limited information is available regarding the ecological risk of this coexistence in sediments. In this study, the effect of nano-TiO2 on Cu speciation in sediments was investigated using sequential extraction. The microcosm approach was also employed to analyze the effects of the coexistence of nano-TiO2 and Cu on extracellular enzyme activity and bacterial communities in sediments. Results showed that nano-TiO2 decreased the organic matter-bound fraction of Cu and increased the corresponding residual fraction Cu. As a result, speciation of exogenous Cu in sediments changed. During the course of the 30-day experiment, the presence of nano-TiO2 did not affect Cu-induced changes in bacterial community structure. However, the coexistence of nano-TiO2 and Cu restrained the activity of bacterial extracellular enzymes, such as alkaline phosphatase and β-glucosidase. The degree of inhibition also varied because of the different properties of extracellular enzymes. This research highlighted the importance of understanding and predicting the effects of the coexistence of nanomaterials and other pollutants in sediments.
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Affiliation(s)
- Wenhong Fan
- Department of Environmental Science and Engineering, School of Space and Environment, Beihang University, Beijing 100191, PR China.
| | - Tong Liu
- Department of Environmental Science and Engineering, School of Space and Environment, Beihang University, Beijing 100191, PR China
| | - Xiaomin Li
- Department of Environmental Science and Engineering, School of Space and Environment, Beihang University, Beijing 100191, PR China
| | - Ruishuang Peng
- Department of Environmental Science and Engineering, School of Space and Environment, Beihang University, Beijing 100191, PR China
| | - Yilin Zhang
- Department of Environmental Science and Engineering, School of Space and Environment, Beihang University, Beijing 100191, PR China
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40
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Wilke CM, Tong T, Gaillard JF, Gray KA. Attenuation of Microbial Stress Due to Nano-Ag and Nano-TiO 2 Interactions under Dark Conditions. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:11302-11310. [PMID: 27635658 DOI: 10.1021/acs.est.6b02271] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Engineered nanomaterials (ENMs) are incorporated into thousands of commercial products, and their release into environmental systems creates complex mixtures with unknown toxicological outcomes. To explore this scenario, we probe the chemical and toxicological interactions of nanosilver (n-Ag) and nanotitania (n-TiO2) in Lake Michigan water, a natural aqueous medium, under dark conditions. We find that the presence of n-Ag induces a stress response in Escherichia coli, as indicated by a decrease in ATP production observed at low concentrations (in the μg L-1 range), with levels that are environmentally relevant. However, when n-Ag and n-TiO2 are present together in a mixture, n-TiO2 attenuates the toxicity of n-Ag at and below 20 μg L-1 by adsorbing Ag+(aq). We observe, however, that toxic stress cannot be explained by dissolved silver concentrations alone and, therefore, must also depend on silver associated with the nanoscale fraction. Although the attenuating effect of n-TiO2 on n-Ag's toxicity is limited, this study emphasizes the importance of probing the toxicity of ENM mixtures under environmental conditions to assess how chemical interactions between nanoparticles change the toxicological effects of single ENMs in unexpected ways.
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Affiliation(s)
- Carolyn M Wilke
- Department of Civil and Environmental Engineering, Northwestern University , 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Tiezheng Tong
- Department of Civil and Environmental Engineering, Northwestern University , 2145 Sheridan Road, Evanston, Illinois 60208, 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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41
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Hu X, Li D, Gao Y, Mu L, Zhou Q. Knowledge gaps between nanotoxicological research and nanomaterial safety. ENVIRONMENT INTERNATIONAL 2016; 94:8-23. [PMID: 27203780 DOI: 10.1016/j.envint.2016.05.001] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2016] [Revised: 05/01/2016] [Accepted: 05/02/2016] [Indexed: 06/05/2023]
Abstract
With the wide research and application of nanomaterials in various fields, the safety of nanomaterials attracts much attention. An increasing number of reports in the literature have shown the adverse effects of nanomaterials, representing the quick development of nanotoxicology. However, many studies in nanotoxicology have not reflected the real nanomaterial safety, and the knowledge gaps between nanotoxicological research and nanomaterial safety remain large. Considering the remarkable influence of biological or environmental matrices (e.g., biological corona) on nanotoxicity, the situation of performing nanotoxicological experiments should be relevant to the environment and humans. Given the possibility of long-term and low-concentration exposure of nanomaterials, the reversibility of and adaptation to nanotoxicity, and the transgenerational effects should not be ignored. Different from common pollutants, the specific analysis methodology for nanotoxicology need development and exploration furthermore. High-throughput assay integrating with omics was highlighted in the present review to globally investigate nanotoxicity. In addition, the biological responses beyond individual levels, special mechanisms and control of nanotoxicity deserve more attention. The progress of nanotoxicology has been reviewed by previous articles. This review focuses on the blind spots in nanotoxicological research and provides insight into what we should do in future work to support the healthy development of nanotechnology and the evaluation of real nanomaterial safety.
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Affiliation(s)
- Xiangang Hu
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China.
| | - Dandan Li
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China
| | - Yue Gao
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China
| | - Li Mu
- Institute of Agro-Environmental Protection, Ministry of Agriculture, Tianjin 300191, China
| | - Qixing Zhou
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China.
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42
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Li Y, Niu J, Shang E, Crittenden JC. Influence of dissolved organic matter on photogenerated reactive oxygen species and metal-oxide nanoparticle toxicity. WATER RESEARCH 2016; 98:9-18. [PMID: 27064207 DOI: 10.1016/j.watres.2016.03.050] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Revised: 03/21/2016] [Accepted: 03/22/2016] [Indexed: 06/05/2023]
Abstract
The effect of humic acid (HA) or fulvic acid (FA) on reactive oxygen species (ROS) generation by six metal-oxide nanoparticles (NPs) and their toxicities toward Escherichia coli was investigated under UV irradiation. Dissolved organic matter (DOM) decreased OH generation by TiO2, ZnO, and Fe2O3, with FA inhibiting OH generation more than HA. The generated OH in NPs/DOM mixtures was higher than the measured concentrations because DOM consumes OH faster than its molecular probe. None of NPs/FA mixtures produced O2(-). The generated O2(-) concentrations in NPs/HA mixtures (except Fe2O3/HA) were higher than the sum of O2(-) concentrations that produced as NPs and HA were presented by themselves. Synergistic O2(-) generation in NPs/HA mixtures resulted from O2 reduction by electron transferred from photoionized HA to NPs. DOM increased (1)O2 generation by TiO2, CuO, CeO2, and SiO2, and FA promoted (1)O2 generation more than HA. Enhanced (1)O2 generation resulted from DOM sensitization of NPs. HA did not increase (1)O2 generation by ZnO and Fe2O3 primarily because released ions quenched (1)O2 precursor ((3)HA*). Linear correlation was developed between total ROS concentrations generated by NPs/DOM mixtures and bacterial survival rates (R(2) ≥ 0.80). The results implied the necessity of considering DOM when investigating the photoreactivity of NPs.
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Affiliation(s)
- Yang Li
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, PR China
| | - Junfeng Niu
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, PR China.
| | - Enxiang Shang
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, PR China
| | - John Charles Crittenden
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, PR China; School of Civil and Environmental Engineering and the Brook Byers Institute for Sustainable Systems, Georgia Institute of Technology, Atlanta, GA 30332, United States
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Ozaki A, Adams E, Binh CTT, Tong T, Gaillard JF, Gray KA, Kelly JJ. One-Time Addition of Nano-TiO2 Triggers Short-Term Responses in Benthic Bacterial Communities in Artificial Streams. MICROBIAL ECOLOGY 2016; 71:266-275. [PMID: 26156053 DOI: 10.1007/s00248-015-0646-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2015] [Accepted: 06/25/2015] [Indexed: 06/04/2023]
Abstract
Nano-TiO2 is an engineered nanomaterial whose production and use are increasing rapidly. Hence, aquatic habitats are at risk for nano-TiO2 contamination due to potential inputs from urban and suburban runoff and domestic wastewater. Nano-TiO2 has been shown to be toxic to a wide range of aquatic organisms, but little is known about the effects of nano-TiO2 on benthic microbial communities. This study used artificial stream mesocosms to assess the effects of a single addition of nano-TiO2 (P25 at a final concentration of 1 mg l(-1)) on the abundance, activity, and community composition of sediment-associated bacterial communities. The addition of nano-TiO2 resulted in a rapid (within 1 day) decrease in bacterial abundance in artificial stream sediments, but bacterial abundance returned to control levels within 3 weeks. Pyrosequencing of partial 16S rRNA genes did not indicate any significant changes in the relative abundance of any bacterial taxa with nano-TiO2 treatment, indicating that nano-TiO2 was toxic to a broad range of bacterial taxa and that recovery of the bacterial communities was not driven by changes in community composition. Addition of nano-TiO2 also resulted in short-term increases in respiration rates and denitrification enzyme activity, with both returning to control levels within 3 weeks. The results of this study demonstrate that single-pulse additions of nano-TiO2 to aquatic habitats have the potential to significantly affect the abundance and activity of benthic microbial communities and suggest that interactions of TiO2 nanoparticles with environmental matrices may limit the duration of their toxicity.
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Affiliation(s)
- Alexandra Ozaki
- Department of Biology, Loyola University Chicago, 1032 West Sheridan Road, Chicago, IL, 60660, USA
| | - Erin Adams
- Department of Biology, Loyola University Chicago, 1032 West Sheridan Road, Chicago, IL, 60660, USA
| | - Chu Thi Thanh Binh
- Department of Biology, Loyola University Chicago, 1032 West Sheridan Road, Chicago, IL, 60660, USA
| | - Tiezheng Tong
- Department of Civil and Environmental Engineering, Northwestern University, 2145 Sheridan Road, Evanston, IL, 60208, USA
| | - Jean-François Gaillard
- Department of Civil and Environmental Engineering, Northwestern University, 2145 Sheridan Road, Evanston, IL, 60208, USA
| | - Kimberly A Gray
- Department of Civil and Environmental Engineering, Northwestern University, 2145 Sheridan Road, Evanston, IL, 60208, USA
| | - John J Kelly
- Department of Biology, Loyola University Chicago, 1032 West Sheridan Road, Chicago, IL, 60660, USA.
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Wyrwoll AJ, Lautenschläger P, Bach A, Hellack B, Dybowska A, Kuhlbusch TAJ, Hollert H, Schäffer A, Maes HM. Size matters--The phototoxicity of TiO2 nanomaterials. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2016; 208:859-867. [PMID: 26613672 DOI: 10.1016/j.envpol.2015.10.035] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Revised: 10/10/2015] [Accepted: 10/21/2015] [Indexed: 06/05/2023]
Abstract
Under solar radiation several titanium dioxide nanoparticles (nano-TiO2) are known to be phototoxic for daphnids. We investigated the influence of primary particle size (10, 25, and 220 nm) and ionic strength (IS) of the test medium on the acute phototoxicity of anatase TiO2 particles to Daphnia magna. The intermediate sized particles (25 nm) showed the highest phototoxicity followed by the 10 nm and 220 nm sized particles (median effective concentrations (EC50): 0.53, 1.28, 3.88 mg/L). Photoactivity was specified by differentiating free OH radicals (therephthalic acid method) and on the other hand surface adsorbed, as well as free OH, electron holes, and O2(-) (electron paramagnetic resonance spectroscopy, EPR). We show that the formation of free OH radicals increased with a decrease in primary particle size (terephthalic acid method), whereas the total measured ROS content was highest at an intermediate particle size of 25 nm, which consequently revealed the highest photoxicity. The photoactivities of the 10 and 220 nm particles as measured by EPR were comparable. We suggest that phototoxicity depends additionally on the particle-daphnia interaction area, which explains the higher photoxicity of the 10 nm particles compared to the 220 nm particles. Thus, phototoxicity is a function of the generation of different ROS and the particle-daphnia interaction area, both depending on particle size. Phototoxicity of the 10 nm and 25 nm sized nanoparticles decreased as IS of the test medium increased (EC50: 2.9 and 1.1 mg/L). In conformity with the Derjaguin-Landau-Verwey-Overbeek (DLVO) theory we suggest that the precipitation of nano-TiO2 was more pronounced in high than in low IS medium, causing a lower phototoxicity. In summary, primary particle size and IS of the medium were identified as factors influencing phototoxicity of anatase nano-TiO2 to D. magna.
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Affiliation(s)
- Anne J Wyrwoll
- Department of Environmental Biology and Chemodynamics, Institute for Environmental Research, RWTH-Aachen University, Worringerweg 1, 52074 Aachen, Germany.
| | - Petra Lautenschläger
- Department of Environmental Biology and Chemodynamics, Institute for Environmental Research, RWTH-Aachen University, Worringerweg 1, 52074 Aachen, Germany.
| | - Alexander Bach
- Department of Environmental Biology and Chemodynamics, Institute for Environmental Research, RWTH-Aachen University, Worringerweg 1, 52074 Aachen, Germany.
| | - Bryan Hellack
- Institute for Energy and Environmental Technology e.V., Bliersheimer Str. 58-60, 47229 Duisburg, Germany.
| | | | - Thomas A J Kuhlbusch
- Institute for Energy and Environmental Technology e.V., Bliersheimer Str. 58-60, 47229 Duisburg, Germany.
| | - Henner Hollert
- Department of Ecosystem Analysis, Institute for Environmental Research, RWTH-Aachen University, Worringerweg 1, 52074 Aachen, Germany; College of Resources and Environmental Science, Chongqing University, 1 Tiansheng Road, Beibei, Chongqing 400715, China; College of Environmental Science and Engineering and State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, 1239 Siping Road, Shanghai, China; State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, China.
| | - Andreas Schäffer
- Department of Environmental Biology and Chemodynamics, Institute for Environmental Research, RWTH-Aachen University, Worringerweg 1, 52074 Aachen, Germany; College of Resources and Environmental Science, Chongqing University, 1 Tiansheng Road, Beibei, Chongqing 400715, China; State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, China.
| | - Hanna M Maes
- Department of Environmental Biology and Chemodynamics, Institute for Environmental Research, RWTH-Aachen University, Worringerweg 1, 52074 Aachen, Germany.
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Bogdan J, Zarzyńska J, Pławińska-Czarnak J. Comparison of Infectious Agents Susceptibility to Photocatalytic Effects of Nanosized Titanium and Zinc Oxides: A Practical Approach. NANOSCALE RESEARCH LETTERS 2015; 10:1023. [PMID: 26239879 PMCID: PMC4523504 DOI: 10.1186/s11671-015-1023-z] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Accepted: 07/27/2015] [Indexed: 05/20/2023]
Abstract
Nanotechnology contributes towards a more effective eradication of pathogens that have emerged in hospitals, veterinary clinics, and food processing plants and that are resistant to traditional drugs or disinfectants. Since new methods of pathogens eradication must be invented and implemented, nanotechnology seems to have become the response to that acute need. A remarkable achievement in this field of science was the creation of self-disinfecting surfaces that base on advanced oxidation processes (AOPs). Thus, the phenomenon of photocatalysis was practically applied. Among the AOPs that have been most studied in respect of their ability to eradicate viruses, prions, bacteria, yeasts, and molds, there are the processes of TiO2/UV and ZnO/UV. Titanium dioxide (TiO2) and zinc oxide (ZnO) act as photocatalysts, after they have been powdered to nanoparticles. Ultraviolet (UV) radiation is an agent that determines their excitation. Methods using photocatalytic properties of nanosized TiO2 and ZnO prove to be highly efficient in inactivation of infectious agents. Therefore, they are being applied on a growing scale. AOP-based disinfection is regarded as a very promising tool that might help overcome problems in food hygiene and public health protection. The susceptibility of infectious agents to photocatalylic processes can be generally arranged in the following order: viruses > prions > Gram-negative bacteria > Gram-positive bacteria > yeasts > molds.
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Affiliation(s)
- Janusz Bogdan
- Department of Food Hygiene and Public Health Protection Faculty of Veterinary Medicine, Warsaw University of Life Sciences—SGGW, Nowoursynowska 159, 02-776 Warsaw, Poland
| | - Joanna Zarzyńska
- Department of Food Hygiene and Public Health Protection Faculty of Veterinary Medicine, Warsaw University of Life Sciences—SGGW, Nowoursynowska 159, 02-776 Warsaw, Poland
| | - Joanna Pławińska-Czarnak
- Department of Food Hygiene and Public Health Protection Faculty of Veterinary Medicine, Warsaw University of Life Sciences—SGGW, Nowoursynowska 159, 02-776 Warsaw, Poland
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Schaumann GE, Philippe A, Bundschuh M, Metreveli G, Klitzke S, Rakcheev D, Grün A, Kumahor SK, Kühn M, Baumann T, Lang F, Manz W, Schulz R, Vogel HJ. Understanding the fate and biological effects of Ag- and TiO₂-nanoparticles in the environment: The quest for advanced analytics and interdisciplinary concepts. THE SCIENCE OF THE TOTAL ENVIRONMENT 2015; 535:3-19. [PMID: 25455109 DOI: 10.1016/j.scitotenv.2014.10.035] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Revised: 10/10/2014] [Accepted: 10/10/2014] [Indexed: 05/29/2023]
Abstract
Engineered inorganic nanoparticles (EINP) from consumers' products and industrial applications, especially silver and titanium dioxide nanoparticles (NP), are emitted into the aquatic and terrestrial environments in increasing amounts. However, the current knowledge on their environmental fate and biological effects is diverse and renders reliable predictions complicated. This review critically evaluates existing knowledge on colloidal aging mechanisms, biological functioning and transport of Ag NP and TiO2 NP in water and soil and it discusses challenges for concepts, experimental approaches and analytical methods in order to obtain a comprehensive understanding of the processes linking NP fate and effects. Ag NP undergo dissolution and oxidation with Ag2S as a thermodynamically determined endpoint. Nonetheless, Ag NP also undergo colloidal transformations in the nanoparticulate state and may act as carriers for other substances. Ag NP and TiO2 NP can have adverse biological effects on organisms. Whereas Ag NP reveal higher colloidal stability and mobility, the efficiency of NOM as a stabilizing agent is greater towards TiO2 NP than towards Ag NP, and multivalent cations can dominate the colloidal behavior over NOM. Many of the past analytical obstacles have been overcome just recently. Single particle ICP-MS based methods in combination with field flow fractionation techniques and hydrodynamic chromatography have the potential to fill the gaps currently hampering a comprehensive understanding of fate and effects also at a low field relevant concentrations. These analytical developments will allow for mechanistically orientated research and transfer to a larger set of EINP. This includes separating processes driven by NP specific properties and bulk chemical properties, categorization of effect-triggering pathways directing the EINP effects towards specific recipients, and identification of dominant environmental parameters triggering fate and effect of EINP in specific ecosystems (e.g. soil, lake, or riverine systems).
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Affiliation(s)
- Gabriele E Schaumann
- Universität Koblenz-Landau, Institute for Environmental Sciences, Group of Environmental and Soil Chemistry, Fortstr. 7, D-76829 Landau, Germany.
| | - Allan Philippe
- Universität Koblenz-Landau, Institute for Environmental Sciences, Group of Environmental and Soil Chemistry, Fortstr. 7, D-76829 Landau, Germany.
| | - Mirco Bundschuh
- Universität Koblenz-Landau, Institute for Environmental Sciences, Group of Ecotoxicology and Environment, Fortstr. 7, D-76829 Landau, Germany; Swedish University of Agricultural Sciences, Department of Aquatic Sciences and Assessment, Lennart Hjelms väg 9, SE-75007 Uppsala, Sweden.
| | - George Metreveli
- Universität Koblenz-Landau, Institute for Environmental Sciences, Group of Environmental and Soil Chemistry, Fortstr. 7, D-76829 Landau, Germany.
| | - Sondra Klitzke
- Albert-Ludwigs-Universität Freiburg, Institute of Forest Sciences, Chair of Soil Ecology, 79085 Freiburg i.Br., Germany; Berlin University of Technology, Institute of Ecology, Department of Soil Science, Ernst-Reuter-Platz 1, D-10587 Berlin, Germany.
| | - Denis Rakcheev
- Universität Koblenz-Landau, Institute for Environmental Sciences, Group of Environmental and Soil Chemistry, Fortstr. 7, D-76829 Landau, Germany.
| | - Alexandra Grün
- Universität Koblenz-Landau, Institute for Integrated Natural Sciences, Dept. of Biology, Universitätsstr. 1, D-56070 Koblenz, Germany.
| | - Samuel K Kumahor
- Helmholtz Centre for Environmental Research - UFZ, Department of Soil Physics, Theodor-Lieser-Strasse 4, D-06120 Halle, Germany.
| | - Melanie Kühn
- Technische Universität München, Institute of Hydrochemistry, Marchioninistr. 17, D-81377 Munich, Germany.
| | - Thomas Baumann
- Technische Universität München, Institute of Hydrochemistry, Marchioninistr. 17, D-81377 Munich, Germany.
| | - Friederike Lang
- Albert-Ludwigs-Universität Freiburg, Institute of Forest Sciences, Chair of Soil Ecology, 79085 Freiburg i.Br., Germany.
| | - Werner Manz
- Universität Koblenz-Landau, Institute for Integrated Natural Sciences, Dept. of Biology, Universitätsstr. 1, D-56070 Koblenz, Germany.
| | - Ralf Schulz
- Universität Koblenz-Landau, Institute for Environmental Sciences, Group of Ecotoxicology and Environment, Fortstr. 7, D-76829 Landau, Germany.
| | - Hans-Jörg Vogel
- Helmholtz Centre for Environmental Research - UFZ, Department of Soil Physics, Theodor-Lieser-Strasse 4, D-06120 Halle, Germany; Martin-Luther-University Halle-Wittenberg, Institute of Soil Science and Plant Nutrition, Von-Seckendorff-Platz 3, 06120 Halle/Saale, Germany.
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47
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Development of silver/titanium dioxide/chitosan adipate nanocomposite as an antibacterial coating for fruit storage. Lebensm Wiss Technol 2015. [DOI: 10.1016/j.lwt.2015.04.049] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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48
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Wang Y, Yao C, Li C, Ding L, Liu J, Dong P, Fang H, Lei Z, Shi G, Wu M. Excess titanium dioxide nanoparticles on the cell surface induce cytotoxicity by hindering ion exchange and disrupting exocytosis processes. NANOSCALE 2015; 7:13105-13115. [PMID: 26176908 DOI: 10.1039/c5nr03269e] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
To date, considerable effort has been devoted to determine the potential toxicity of nanoparticles to cells and organisms. However, determining the mechanism of cytotoxicity induced by different types of nanoparticles remains challenging. Herein, typically low toxicity nanomaterials were used as a model to investigate the mechanism of cytotoxicity induced by low toxicity nanomaterials. We studied the effect of nano-TiO2, nano-Al2O3 and nano-SiO2 deposition films on the ion concentration on a cell-free system simulating the cell membrane. The results showed that the ion concentration of K(+), Ca(2+), Na(+), Mg(2+) and SO4(2-) decreased significantly following filtration of the prepared deposition films. More specifically, at a high nano-TiO2 concentration (200 mg L(-1)) and a long nano-TiO2 deposition time (48 h), the concentration of Na(+) decreased from 2958.01 to 2775.72, 2749.86, 2757.36, and 2719.82 mg L(-1), respectively, for the four types of nano-TiO2 studied. Likewise, the concentration of SO4(2-) decreased from 38.83 to 35.00, 35.80, 35.40, and 35.27 mg L(-1), respectively. The other two kinds of typical low toxicity nanomaterials (nano-Al2O3 and nano-SiO2) have a similar impact on the ion concentration change trend. Adsorption of ions on nanoparticles and the hydrated shell around the ions strongly hindered the ions through the nanoparticle films. The endocytosed nanoparticles could be released from the cells without inducing cytotoxicity. Hindering the ion exchange and disrupting the exocytosis process are the main factors that induce cytotoxicity in the presence of excess nano-TiO2 on the cell surface. The current findings may offer a universal principle for understanding the mechanism of cytotoxicity induced by low toxicity nanomaterials.
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Affiliation(s)
- Yanli Wang
- Institute of Nanochemistry and Nanobiology, Shanghai University, Shanghai 200444, P.R. China.
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49
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Decolorization characteristics of a newly isolated salt-tolerant Bacillus sp. strain and its application for azo dye-containing wastewater in immobilized form. Appl Microbiol Biotechnol 2015; 99:9277-87. [PMID: 26175104 DOI: 10.1007/s00253-015-6798-4] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Revised: 06/22/2015] [Accepted: 06/24/2015] [Indexed: 10/23/2022]
Abstract
Strain CICC 23870 capable of decolorization of various azo dyes under high saline conditions was isolated from saline-alkali soil. The oxygen-insensitive azoreductase in crude extracts exhibited a wide substrate adaptively in the presence of NADH as a cofactor. The decolorization process by free cells followed first-order kinetics, with a high Methyl Orange (MO) tolerance concentration up to 100 mg l(-1) estimated by Haldane model. The average decolorization rate of free cell system was 26.30 mg g(-1) h(-1) at initial MO concentration of 32.7 mg l(-1). However, the values for the systems of immobilized cells (4 mm) in alginate, alginate and nano-TiO2, and alginate and powered activated carbon (PAC) were 6.83, 4.64, and 11.34 mg g(-1) h(-1), respectively. The effective diffusion factors in the tree different matrices were calculated by diffusion-based mathematic model. The diffusion step controls the overall decolorization rate, and the effective diffusion coefficients varied with internal structure of the bead matrices. The diffusion coefficients were increased from 4.98 × 10(-9) to 2.25 × 10(-8) cm(2) s(-1) when PAC was added, but decreased to 6.62 × 10(-10) cm(2) s(-1) when nano-TiO2 was added. The immobilized matrices could be reused for at least three cycles but with a decreased decolorization rate, possibly due to the breakage of beads at the end of each cycle, which led to the loss of immobilized bacteria.
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50
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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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