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Zhang X, Liu S, Salim A, Seeger S. Hierarchical Structured Multifunctional Self-Cleaning Material with Durable Superhydrophobicity and Photocatalytic Functionalities. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1901822. [PMID: 31184439 DOI: 10.1002/smll.201901822] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 05/13/2019] [Indexed: 06/09/2023]
Abstract
Self-cleaning materials, which are inspired and derived from natural phenomena, have gained significant scientific and commercial interest in the past decades as they are energy- and labor-saving and environmentally friendly. Several technologies are developed to obtain self-cleaning materials. The combination of superhydrophobic and photocatalytic properties enables the efficient removal of solid particles and organic contaminations, which could reduce or damage the superhydrophobicity. However, the fragility of the nanoscale roughness of the superhydrophobic surface limits its practical application. Here, a hierarchical structure approach combining micro- and nanoscale architectures is created to protect the nanoscale surface roughness from mechanical damage. Glass beads of 75 µm are partially embedded into a low-density polyethylene film. This composite surface is coated with silicone nanofilaments (SNFs) via the droplet-assisted growth and shaping approach, providing the nanoscale surface roughness as well as the support for the photocatalyst with enlarged surface area. TiO2 nanoparticles, which serve as the photocatalyst, are synthesized in situ on SNFs through a hydrothermal reaction. The self-cleaning effect is proved using wettability measurements for various liquids, degradation of organic contamination under UV light, and antibacterial tests. The enhanced mechanical durability of the hierarchical structure of the composite material is verified with an abrasion test.
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Affiliation(s)
- Xiaotian Zhang
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland
| | - Shanqiu Liu
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland
| | - Alma Salim
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland
| | - Stefan Seeger
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland
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Capeness MJ, Imrie L, Mühlbauer LF, Le Bihan T, Horsfall LE. Shotgun proteomic analysis of nanoparticle-synthesizing Desulfovibrio alaskensis in response to platinum and palladium. MICROBIOLOGY-SGM 2019; 165:1282-1294. [PMID: 31361216 PMCID: PMC7376266 DOI: 10.1099/mic.0.000840] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Platinum and palladium are much sought-after metals of critical global importance in terms of abundance and availability. At the nano-scale these metals are of even higher value due to their catalytic abilities for industrial applications. Desulfovibrio alaskensis is able to capture ionic forms of both of these metals, reduce them and synthesize elemental nanoparticles. Despite this ability, very little is known about the biological pathways involved in the formation of these nanoparticles. Proteomic analysis of D. alaskensis in response to platinum and palladium has highlighted those proteins involved in both the reductive pathways and the wider stress-response system. A core set of 13 proteins was found in both treatments and consisted of proteins involved in metal transport and reduction. There were also seven proteins that were specific to either platinum or palladium. Overexpression of one of these platinum-specific genes, a NiFe hydrogenase small subunit (Dde_2137), resulted in the formation of larger nanoparticles. This study improves our understanding of the pathways involved in the metal resistance mechanism of Desulfovibrio and is informative regarding how we can tailor the bacterium for nanoparticle production, enhancing its application as a bioremediation tool and as a way to capture contaminant metals from the environment.
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Affiliation(s)
- Michael J Capeness
- Institute of Quantitative Biology, Biochemistry and Biotechnology/CSEC, School of Biological Sciences, University of Edinburgh, Edinburgh, EH9 3FF, UK
| | - Lisa Imrie
- EdinOmics, SynthSys, CH Waddington Building, Max Born Crescent, The King's Buildings, Edinburgh, EH9 3BF, UK
| | - Lukas F Mühlbauer
- Institute of Quantitative Biology, Biochemistry and Biotechnology/CSEC, School of Biological Sciences, University of Edinburgh, Edinburgh, EH9 3FF, UK
| | - Thierry Le Bihan
- Currently: Rapid Novor, Inc., Kitchener, Ontario N2G 4P3, Canada.,EdinOmics, SynthSys, CH Waddington Building, Max Born Crescent, The King's Buildings, Edinburgh, EH9 3BF, UK
| | - Louise E Horsfall
- Institute of Quantitative Biology, Biochemistry and Biotechnology/CSEC, School of Biological Sciences, University of Edinburgh, Edinburgh, EH9 3FF, UK
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103
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Sharma S, Sharma RK, Gaur K, Cátala Torres JF, Loza-Rosas SA, Torres A, Saxena M, Julin M, Tinoco AD. Fueling a Hot Debate on the Application of TiO 2 Nanoparticles in Sunscreen. MATERIALS (BASEL, SWITZERLAND) 2019; 12:E2317. [PMID: 31330764 PMCID: PMC6678326 DOI: 10.3390/ma12142317] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/30/2019] [Revised: 07/17/2019] [Accepted: 07/17/2019] [Indexed: 12/20/2022]
Abstract
Titanium is one of the most abundant elements in the earth's crust and while there are many examples of its bioactive properties and use by living organisms, there are few studies that have probed its biochemical reactivity in physiological environments. In the cosmetic industry, TiO2 nanoparticles are widely used. They are often incorporated in sunscreens as inorganic physical sun blockers, taking advantage of their semiconducting property, which facilitates absorbing ultraviolet (UV) radiation. Sunscreens are formulated to protect human skin from the redox activity of the TiO2 nanoparticles (NPs) and are mass-marketed as safe for people and the environment. By closely examining the biological use of TiO2 and the influence of biomolecules on its stability and solubility, we reassess the reactivity of the material in the presence and absence of UV energy. We also consider the alarming impact that TiO2 NP seepage into bodies of water can cause to the environment and aquatic life, and the effect that it can have on human skin and health, in general, especially if it penetrates into the human body and the bloodstream.
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Affiliation(s)
- Shweta Sharma
- Department of Environmental Sciences, University of Puerto Rico Río Piedras, 17 AVE Universidad STE 1701, San Juan, PR 00925-2537, USA
| | - Rohit K Sharma
- Department of Chemistry, University of Puerto Rico Río Piedras, 17 AVE Universidad STE 1701, San Juan, PR 00925-2537, USA
| | - Kavita Gaur
- Department of Chemistry, University of Puerto Rico Río Piedras, 17 AVE Universidad STE 1701, San Juan, PR 00925-2537, USA
| | - José F Cátala Torres
- Department of Chemistry, University of Puerto Rico Río Piedras, 17 AVE Universidad STE 1701, San Juan, PR 00925-2537, USA
| | - Sergio A Loza-Rosas
- Department of Chemistry, University of Puerto Rico Río Piedras, 17 AVE Universidad STE 1701, San Juan, PR 00925-2537, USA
| | - Anamaris Torres
- Biochemistry & Pharmacology Department, San Juan Bautista School of Medicine, Caguas, PR 00726, USA
| | - Manoj Saxena
- Department of Chemistry, University of Puerto Rico Río Piedras, 17 AVE Universidad STE 1701, San Juan, PR 00925-2537, USA
| | - Mara Julin
- Department of Chemistry, Syracuse University, Syracuse, NY 13244, USA
| | - Arthur D Tinoco
- Department of Chemistry, University of Puerto Rico Río Piedras, 17 AVE Universidad STE 1701, San Juan, PR 00925-2537, USA.
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Non-Resorbable Nanocomposite Membranes for Guided Bone Regeneration Based On Polysulfone-Quartz Fiber Grafted with Nano-TiO 2. NANOMATERIALS 2019; 9:nano9070985. [PMID: 31288413 PMCID: PMC6669488 DOI: 10.3390/nano9070985] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 06/29/2019] [Accepted: 07/01/2019] [Indexed: 12/11/2022]
Abstract
The polymer-inorganic nanoparticles composite membranes are the latest solutions for multiple physicochemical resistance and selectivity requirements of membrane processes. This paper presents the production of polysulfone-silica microfiber grafted with titanium dioxide nanoparticles (PSf-SiO2-TiO2) composite membranes. Silica microfiber of length 150-200 μm and diameter 12-15 μm were grafted with titanium dioxide nanoparticles, which aggregated as microspheres of 1-3 μm, applying the sol-gel method. The SiO2 microfibers grafted with nano-TiO2 were used to prepare 12% polysulfone-based nanocomposite membranes in N-methyl pyrrolidone through the inversion phase method by evaporation. The obtained nanocomposite membranes, PSf-SiO2-TiO2, have flux characteristics, retention, mechanical characteristics, and chemical oxidation resistance superior to both the polysulfone integral polymer membranes and the PSf-SiO2 composite membranes. The antimicrobial tests highlighted the inhibitory effect of the PSf-SiO2-TiO2 composite membranes on five Gram (-) microorganisms and did not allow the proliferation of Candida albicans strain, proving that they are suitable for usage in the oral environment. The designed membrane met the required characteristics for application as a functional barrier in guided bone regeneration.
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105
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Long GS, Hussen M, Dench J, Aris-Brosou S. Identifying genetic determinants of complex phenotypes from whole genome sequence data. BMC Genomics 2019; 20:470. [PMID: 31182025 PMCID: PMC6558885 DOI: 10.1186/s12864-019-5820-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Accepted: 05/21/2019] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND A critical goal in biology is to relate the phenotype to the genotype, that is, to find the genetic determinants of various traits. However, while simple monofactorial determinants are relatively easy to identify, the underpinnings of complex phenotypes are harder to predict. While traditional approaches rely on genome-wide association studies based on Single Nucleotide Polymorphism data, the ability of machine learning algorithms to find these determinants in whole proteome data is still not well known. RESULTS To better understand the applicability of machine learning in this case, we implemented two such algorithms, adaptive boosting (AB) and repeated random forest (RRF), and developed a chunking layer that facilitates the analysis of whole proteome data. We first assessed the performance of these algorithms and tuned them on an influenza data set, for which the determinants of three complex phenotypes (infectivity, transmissibility, and pathogenicity) are known based on experimental evidence. This allowed us to show that chunking improves runtimes by an order of magnitude. Based on simulations, we showed that chunking also increases sensitivity of the predictions, reaching 100% with as few as 20 sequences in a small proteome as in the influenza case (5k sites), but may require at least 30 sequences to reach 90% on larger alignments (500k sites). While RRF has less specificity than random forest, it was never <50%, and RRF sensitivity was significantly higher at smaller chunk sizes. We then used these algorithms to predict the determinants of three types of drug resistance (to Ciprofloxacin, Ceftazidime, and Gentamicin) in a bacterium, Pseudomonas aeruginosa. While both algorithms performed well in the case of the influenza data, results were more nuanced in the bacterial case, with RRF making more sensible predictions, with smaller errors rates, than AB. CONCLUSIONS Altogether, we demonstrated that ML algorithms can be used to identify genetic determinants in small proteomes (viruses), even when trained on small numbers of individuals. We further showed that our RRF algorithm may deserve more scrutiny, which should be facilitated by the decreasing costs of both sequencing and phenotyping of large cohorts of individuals.
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Affiliation(s)
- George S Long
- Department of Biology, University of Ottawa, Ottawa, Ontario, Canada
| | - Mohammed Hussen
- Department of Biology, University of Ottawa, Ottawa, Ontario, Canada
| | - Jonathan Dench
- Department of Biology, University of Ottawa, Ottawa, Ontario, Canada
| | - Stéphane Aris-Brosou
- Department of Biology, University of Ottawa, Ottawa, Ontario, Canada. .,Department of Mathematics and Statistics, University of Ottawa, Ottawa, Ontario, Canada.
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106
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Timmermans R, Mastwijk H, Berendsen L, Nederhoff A, Matser A, Van Boekel M, Nierop Groot M. Moderate intensity Pulsed Electric Fields (PEF) as alternative mild preservation technology for fruit juice. Int J Food Microbiol 2019; 298:63-73. [DOI: 10.1016/j.ijfoodmicro.2019.02.015] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Revised: 01/11/2019] [Accepted: 02/18/2019] [Indexed: 01/11/2023]
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107
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Souzandeh H, Wang Y, Netravali AN, Zhong WH. Towards Sustainable and Multifunctional Air-Filters: A Review on Biopolymer-Based Filtration Materials. POLYM REV 2019. [DOI: 10.1080/15583724.2019.1599391] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Hamid Souzandeh
- Fiber Science and Apparel Design, Cornell University, Ithaca, New York, USA
| | - Yu Wang
- School of Mechanical and Materials Engineering, Washington State University, Pullman, Washington, USA
| | - Anil N. Netravali
- Fiber Science and Apparel Design, Cornell University, Ithaca, New York, USA
| | - Wei-Hong Zhong
- School of Mechanical and Materials Engineering, Washington State University, Pullman, Washington, USA
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108
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Photocatalytic Activity of Nanostructured Titania Films Obtained by Electrochemical, Chemical, and Thermal Oxidation of Ti6Al4V Alloy—Comparative Analysis. Catalysts 2019. [DOI: 10.3390/catal9030279] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Three different Ti6Al4V surface oxidation methods have been applied to obtain three types of titania materials of different nanoarchitecture. Electrochemical oxidation of titanium alloy allowed for obtaining titania nanotubes (TNT), chemical oxidation led to obtain titania nanofibers (TNF), and thermal oxidation gave titania nanowires (TNW). My earlier investigations of these nanomaterials were focused mainly on the estimation of their bioactivity and potential application in modern implantology. In this article, the comparative analysis of the photocatalytic activity of produced systems, as well as the impact of their structure and morphology on this activity, are discussed. The activity of studied nanomaterials was estimated basis of UV-induced degradation of methylene blue and also acetone, and it was determined quantitatively according to the Langmuir–Hinshelwood reaction mechanism. The obtained results were compared to the activity of Pilkington Glass ActivTM (reference sample). Among analyzed systems, titania nanofibers obtained at 140 and 120 °C, possessing anatase and anatase/amorphous structure, as well as titania nanowires obtained at 475 and 500 °C, possessing anatase and anatase/rutile structure, were better photocatalyst than the reference sample. Completely amorphous titania nanotubes, turned out to be an interesting alternative for photocatalytic materials in the form of thin films, however, their photocatalytic activity is lower than for Pilkington Glass ActivTM.
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109
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Gajarska Z, Zelenka KC, Rathner P, Recktenwald D, Kollender JP, Shahzad K, Müller N, Hassel AW, Mardare CC. Insight into Antimicrobial Properties via Self-Acidification of Compounds from the Molybdenum–Tungsten–Oxygen System. ACS APPLIED BIO MATERIALS 2019; 2:1477-1489. [DOI: 10.1021/acsabm.8b00722] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zuzana Gajarska
- CEST Competence Center for Electrochemical Surface Technology, Viktor Kaplan Strasse 2, Wiener Neustadt 2700, Austria
- CEST Competence Center for Electrochemical Surface Technology, Altenberger Strasse 69, Linz 4040, Austria
| | - Karl Christian Zelenka
- CEST Competence Center for Electrochemical Surface Technology, Viktor Kaplan Strasse 2, Wiener Neustadt 2700, Austria
- CEST Competence Center for Electrochemical Surface Technology, Altenberger Strasse 69, Linz 4040, Austria
| | | | | | | | - Khurram Shahzad
- CEST Competence Center for Electrochemical Surface Technology, Viktor Kaplan Strasse 2, Wiener Neustadt 2700, Austria
- CEST Competence Center for Electrochemical Surface Technology, Altenberger Strasse 69, Linz 4040, Austria
| | | | - Achim Walter Hassel
- CEST Competence Center for Electrochemical Surface Technology, Viktor Kaplan Strasse 2, Wiener Neustadt 2700, Austria
- CEST Competence Center for Electrochemical Surface Technology, Altenberger Strasse 69, Linz 4040, Austria
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110
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Zhang J, Wang X, Suo X, Liu X, Liu B, Yuan M, Wang G, Liang C, Shi H. Cellular Response of Escherichia coli to Photocatalysis: Flagellar Assembly Variation and Beyond. ACS NANO 2019; 13:2004-2014. [PMID: 30721027 DOI: 10.1021/acsnano.8b08475] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Bacterial cells can be inactivated by external reactive oxygen species (ROS) produced by semiconductor photocatalysis. However, little is known about cellular responses to photocatalysis. For a better understanding of this issue, one strain of Escherichia coli ( E. coli, hereafter named as MT), which has an increased ability to metabolize carbon sources, was screened out from the wild-type (WT) E. coli K12 by repeated exposure to photocatalysis with palladium oxide modified nitrogen-doped titanium dioxide. In this study, transcriptome sequencing of the WT and MT strains that were exposed or unexposed to photocatalysis were carried out. Cellular responses to photocatalysis were inferred from the functions of genes whose transcripts were either increased or decreased. Upregulation of expression of bacterial flagellar assembly genes used for chemotaxis was detected in cells exposed to semilethal photocatalytic conditions of the WT E. coli. Increased capability to degrade superoxide radicals and decreased bacterial flagellar assembly and chemotaxis were observed in MT E. coli compared to WT cells. We conclude that the differences in motility and intracellular ROS between MT and WT are directly related to survivability of E. coli during exposure to photodisinfection.
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Affiliation(s)
- Jingtao Zhang
- Collaborative Innovation Centre of Food Production and Safety, Henan Key Laboratory of Cold Chain Food Quality and Safety Control, School of Food and Bioengineering , Zhengzhou University of Light Industry , Zhengzhou 450002 , China
| | - Xueying Wang
- Collaborative Innovation Centre of Food Production and Safety, Henan Key Laboratory of Cold Chain Food Quality and Safety Control, School of Food and Bioengineering , Zhengzhou University of Light Industry , Zhengzhou 450002 , China
| | - Xinying Suo
- Collaborative Innovation Centre of Food Production and Safety, Henan Key Laboratory of Cold Chain Food Quality and Safety Control, School of Food and Bioengineering , Zhengzhou University of Light Industry , Zhengzhou 450002 , China
| | - Xing Liu
- Collaborative Innovation Centre of Food Production and Safety, Henan Key Laboratory of Cold Chain Food Quality and Safety Control, School of Food and Bioengineering , Zhengzhou University of Light Industry , Zhengzhou 450002 , China
| | - Bingkun Liu
- School of Material and Chemical Engineering , Zhengzhou University of Light Industry , Zhengzhou 450002 , China
| | - Mingming Yuan
- Collaborative Innovation Centre of Food Production and Safety, Henan Key Laboratory of Cold Chain Food Quality and Safety Control, School of Food and Bioengineering , Zhengzhou University of Light Industry , Zhengzhou 450002 , China
| | - Guanglu Wang
- Collaborative Innovation Centre of Food Production and Safety, Henan Key Laboratory of Cold Chain Food Quality and Safety Control, School of Food and Bioengineering , Zhengzhou University of Light Industry , Zhengzhou 450002 , China
| | - Chengzhen Liang
- Biotechnology Research Institute , Chinese Academy of Agricultural Sciences , Beijing 100081 , China
| | - Hengzhen Shi
- School of Material and Chemical Engineering , Zhengzhou University of Light Industry , Zhengzhou 450002 , China
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111
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Muñoz-Bonilla A, Echeverria C, Sonseca Á, Arrieta MP, Fernández-García M. Bio-Based Polymers with Antimicrobial Properties towards Sustainable Development. MATERIALS (BASEL, SWITZERLAND) 2019; 12:E641. [PMID: 30791651 PMCID: PMC6416599 DOI: 10.3390/ma12040641] [Citation(s) in RCA: 74] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Revised: 02/13/2019] [Accepted: 02/15/2019] [Indexed: 12/11/2022]
Abstract
This article concisely reviews the most recent contributions to the development of sustainable bio-based polymers with antimicrobial properties. This is because some of the main problems that humanity faces, nowadays and in the future, are climate change and bacterial multi-resistance. Therefore, scientists are trying to provide solutions to these problems. In an attempt to organize these antimicrobial sustainable materials, we have classified them into the main families; i.e., polysaccharides, proteins/polypeptides, polyesters, and polyurethanes. The review then summarizes the most recent antimicrobial aspects of these sustainable materials with antimicrobial performance considering their main potential applications in the biomedical field and in the food industry. Furthermore, their use in other fields, such as water purification and coating technology, is also described. Finally, some concluding remarks will point out the promise of this theme.
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Affiliation(s)
- Alexandra Muñoz-Bonilla
- Instituto de Ciencia y Tecnología de Polímeros (ICTP-CSIC), C/Juan de la Cierva 3, 28006 Madrid, Spain.
| | - Coro Echeverria
- Instituto de Ciencia y Tecnología de Polímeros (ICTP-CSIC), C/Juan de la Cierva 3, 28006 Madrid, Spain.
| | - Águeda Sonseca
- Instituto de Ciencia y Tecnología de Polímeros (ICTP-CSIC), C/Juan de la Cierva 3, 28006 Madrid, Spain.
| | - Marina P Arrieta
- Facultad de Ciencias Químicas, Universidad Complutense de Madrid (UCM), Av. Complutense s/n, Ciudad Universitaria, 28040 Madrid, Spain.
| | - Marta Fernández-García
- Instituto de Ciencia y Tecnología de Polímeros (ICTP-CSIC), C/Juan de la Cierva 3, 28006 Madrid, Spain.
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112
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Lewis RW, Bertsch PM, McNear DH. Nanotoxicity of engineered nanomaterials (ENMs) to environmentally relevant beneficial soil bacteria - a critical review. Nanotoxicology 2019; 13:392-428. [PMID: 30760121 DOI: 10.1080/17435390.2018.1530391] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Deposition of engineered nanomaterials (ENMs) in various environmental compartments is projected to continue rising exponentially. Terrestrial environments are expected to be the largest repository for environmentally released ENMs. Because ENMs are enriched in biosolids during wastewater treatment, agriculturally applied biosolids facilitate ENM exposure of key soil micro-organisms, such as plant growth-promoting rhizobacteria (PGPR). The ecological ramifications of increasing levels of ENM exposure of terrestrial micro-organisms are not clearly understood, but a growing body of research has investigated the toxicity of ENMs to various soil bacteria using a myriad of toxicity end-points and experimental procedures. This review explores what is known regarding ENM toxicity to important soil bacteria, with a focus on ENMs which are expected to accumulate in terrestrial ecosystems at the highest concentrations and pose the greatest potential threat to soil micro-organisms having potential indirect detrimental effects on plant growth. Knowledge gaps in the fundamental understanding of nanotoxicity to bacteria are identified, including the role of physicochemical properties of ENMs in toxicity responses, particularly in agriculturally relevant micro-organisms. Strategies for improving the impact of future research through the implementation of in-depth ENM characterization and use of necessary experimental controls are proposed. The future of nanotoxicological research employing microbial ecoreceptors is also explored, highlighting the need for continued research utilizing bacterial isolates while concurrently expanding efforts to study ENM-bacteria interactions in more complex environmentally relevant media, e.g. soil. Additionally, the particular importance of future work to extensively examine nanotoxicity in the context of bacterial ecosystem function, especially of plant growth-promoting agents, is proposed.
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Affiliation(s)
- Ricky W Lewis
- a Rhizosphere Science Laboratory, Department of Plant and Soil Sciences , University of Kentucky , Lexington , KY , USA
| | - Paul M Bertsch
- a Rhizosphere Science Laboratory, Department of Plant and Soil Sciences , University of Kentucky , Lexington , KY , USA.,b CSIRO Land and Water , Ecosciences Precinct , Brisbane , Australia.,c Center for the Environmental Implications of Nanotechnology (CEINT) , Duke University , Durham , NC , USA
| | - David H McNear
- a Rhizosphere Science Laboratory, Department of Plant and Soil Sciences , University of Kentucky , Lexington , KY , USA
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113
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Anupama R, Lulu S, Madhusmita R, Vino S, Mukherjee A, Babu S. Insights into the interaction of key biofilm proteins in Pseudomonas aeruginosa PAO1 with TiO 2 nanoparticle: An in silico analysis. J Theor Biol 2019; 462:12-25. [PMID: 30391649 DOI: 10.1016/j.jtbi.2018.10.057] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Revised: 10/26/2018] [Accepted: 10/29/2018] [Indexed: 10/27/2022]
Abstract
Pseudomonas aeruginosa is a pathogenic biofilm forming bacteria which exist in wide range of environments such as water, soil and human body. In an earlier study, we used a system biology approach based analysis of biofilm forming genes of P. aeruginosa and their possible role in TiO2 nanoparticle binding. The major protein of P. aeruginosa targeted by TiO2 was found to be KatA, a major catalase required for H2O2 resistance and acute virulence and the direct interacting protein partners of KatA were found to be DnaK, Hfq, RpoA and RpoS. To understand the protein-protein physical interaction characteristic of these key proteins involved in biofilm related processes, homology modeling, docking and molecular dynamic simulation were performed. For all these proteins, physical and chemical properties, amino acid composition, nest and cleft analysis were performed using online tools. The interactions between TiO2NPs-KatA and four protein-protein complexes such as KatA-DnaK, KatA-Hfq, KatA-RpoA and KatA-RpoS were studied. Our results indicate that all four key proteins and TiO2NPs can have stable complexation with KatA. The study has given enough clues to understand the interaction of TiO2NPs with P. aeruginosa biofilm in natural environment. Further investigations could lead to development of TiO2NPs based therapeutic and sanitary interventions to combat this pathogenic bacterium.
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Affiliation(s)
- Rani Anupama
- School of Bio Sciences and Technology, Vellore Institute of Technology, Vellore 632014, Tamil Nadu, India
| | - Sajitha Lulu
- School of Bio Sciences and Technology, Vellore Institute of Technology, Vellore 632014, Tamil Nadu, India.
| | - Rout Madhusmita
- School of Bio Sciences and Technology, Vellore Institute of Technology, Vellore 632014, Tamil Nadu, India
| | - Sundararajan Vino
- School of Bio Sciences and Technology, Vellore Institute of Technology, Vellore 632014, Tamil Nadu, India.
| | - Amitava Mukherjee
- Centre for Nanobiotechnology, Vellore Institute of Technology, Vellore 632014, Tamil Nadu, India.
| | - Subramanian Babu
- School of Bio Sciences and Technology, Vellore Institute of Technology, Vellore 632014, Tamil Nadu, India.
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114
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Khan ST, Malik A. Engineered nanomaterials for water decontamination and purification: From lab to products. JOURNAL OF HAZARDOUS MATERIALS 2019; 363:295-308. [PMID: 30312926 DOI: 10.1016/j.jhazmat.2018.09.091] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2018] [Revised: 09/21/2018] [Accepted: 09/30/2018] [Indexed: 06/08/2023]
Abstract
Clean water is vital for life; it is required not only for drinking but also for the preparation of food and proper hygiene. Unfortunately, more than fifty percent of the world population mainly in China and India face a severe scarcity of water. Around 1.8 billion people inevitably drink water from sources having fecal contamination resulting in the death of about a million children every year. Scientists are developing various economic technologies to decontaminate and purify water. Nanomaterials-based technology offers an economic and effective alternative for water purification and decontamination. As nanomaterials are available globally, have remarkable antimicrobial activity and the ability to effectively remove organic and inorganic pollutants from water. This review discusses the potential role of nanomaterials in the purification of drinking water. As nanomaterials exhibit remarkable antimicrobial and antiparasitic activities against waterborne pathogens and parasites of primary concern like Shigella dysenteriae, Vibrio cholera, and Entamoeba histolytica. Nanomaterials also demonstrate the ability to absorb toxic chemicals like mercury and dyes from polluted water. However, for successful commercialization of the technology, some inherent bottlenecks need to be addressed adequately. These include nanoparticles aggregation, their seepage into drinking water and adverse effects on human health and the environment. Nanocomposites are being developed to overcome these problems and to combine two or more desirable properties for water purification. Widespread and large-scale use of nanomaterials for water purification soon may become a reality. Products containing nanomaterials such as Karofi, Lifestraw, and Tupperware for water purification are already available in the market.
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Affiliation(s)
- Shams Tabrez Khan
- Department of Agricultural Microbiology, Faculty of Agriculture Sciences, Aligarh Muslim University, Aligarh, UP, India.
| | - Abdul Malik
- Department of Agricultural Microbiology, Faculty of Agriculture Sciences, Aligarh Muslim University, Aligarh, UP, India
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115
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Shin W, Han HS, Le NTK, Kang K, Jang H. Antibacterial nanoparticles: enhanced antibacterial efficiency of coral-like crystalline rhodium nanoplates. RSC Adv 2019; 9:6241-6244. [PMID: 35517250 PMCID: PMC9060943 DOI: 10.1039/c9ra00214f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Accepted: 02/14/2019] [Indexed: 11/26/2022] Open
Abstract
This paper deals with the newly found antibacterial efficiency of coral-like crystalline Rh nanoplates. Rh nanoplates with rough surface morphology synthesized by inverse-directional galvanic replacement exhibited highly enhanced antibacterial efficiency compared to Rh3+ ion and Rh nanospheres. The observed antibacterial efficiency was comparable to Ag nanoplates, a well-known anticancer nano-agent. Results clearly demonstrate that the composition and morphology of a nanostructure play significant roles in antibacterial effects. This paper deals with the newly found antibacterial efficiency of coral-like crystalline Rh nanoplates.![]()
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Affiliation(s)
- Woojun Shin
- Department of Chemistry
- Kwangwoon University
- Seoul 01897
- Republic of Korea
| | - Hyuk Seung Han
- Department of Applied Chemistry
- Kyung Hee University
- Yongin
- Republic of Korea
| | - Nghia T. K. Le
- Department of Applied Chemistry
- Kyung Hee University
- Yongin
- Republic of Korea
| | - Kyungtae Kang
- Department of Applied Chemistry
- Kyung Hee University
- Yongin
- Republic of Korea
| | - Hongje Jang
- Department of Chemistry
- Kwangwoon University
- Seoul 01897
- Republic of Korea
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116
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Gomes SIL, Roca CP, von der Kammer F, Scott-Fordsmand JJ, Amorim MJB. Mechanisms of (photo)toxicity of TiO 2 nanomaterials (NM103, NM104, NM105): using high-throughput gene expression in Enchytraeus crypticus. NANOSCALE 2018; 10:21960-21970. [PMID: 30444228 DOI: 10.1039/c8nr03251c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Titanium dioxide (TiO2) based nanomaterials (NMs) are among the most produced NMs worldwide. When irradiated with light, particularly UV, TiO2 is photoactive, a property that is explored for several purposes. There are an increasing number of reports on the negative effects of photoactivated TiO2 on non-target organisms. We have here studied the effect of a suite of reference type TiO2 NMs (i.e. NM103, NM104, and NM105 and compared these to the bulk) with and without UV radiation to the oligochaete Enchytraeus crypticus. High-throughput gene expression was used to assess the molecular mechanisms, while also anchoring it to the known effects at the organism level (i.e., reproduction). Results showed that the photoactivity of TiO2 (UV exposed) played a major role in enhancing TiO2 toxicity, activating the transcription of oxidative stress, lysosome damage and apoptosis mechanisms. For non-UV activated TiO2, where toxicity at the organism level (reproduction) was lower, results showed potential for long-term effects (i.e., mutagenic and epigenetic). NM specific mechanisms were identified: NM103 affected transcription and translation, NM104_UV negatively affected the reproductive system/organs, and NM105_UV activated superoxide anion response. Results provided mechanistic information on UV-related phototoxicity of TiO2 materials and evidence for the potential long-term effects.
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Affiliation(s)
- Susana I L Gomes
- Department of Biology & CESAM, University of Aveiro, 3810-193 Aveiro, Portugal.
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117
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Mechanisms of the Antibacterial Effects of TiO2–FeOx under Solar or Visible Light: Schottky Barriers versus Surface Plasmon Resonance. COATINGS 2018. [DOI: 10.3390/coatings8110391] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
This study reports the significant mechanistic difference between binary-oxide antibacterial films with the same composition but different microstructures. Binary TiO2-FeOx films were found to present a faster bacterial inactivation kinetics under visible light irradiation than each single oxide acting independently. The interaction between the film active surface species and the bacteria within the disinfection period was followed by X-ray photoelectron spectroscopy (XPS) and provided the evidence for a redox catalysis taking place during the bacterial inactivation time. The optical and surface properties of the films were evaluated by appropriate surface analytical methods. A differential mechanism is suggested for each specific microstructure inducing bacterial inactivation. The surface FeOx plasmon resonance transferred electrons into the conduction band of TiO2 because of the Schottky barrier after Fermi level equilibration of the two components. An electric field at the interface between TiO2 and FeOx, favors the separation of the photo-generated charges leading to a faster bacterial inactivation by TiO2–FeOx compared to the bacterial inactivation kinetics by each of the single oxides.
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118
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Limo MJ, Sola-Rabada A, Boix E, Thota V, Westcott ZC, Puddu V, Perry CC. Interactions between Metal Oxides and Biomolecules: from Fundamental Understanding to Applications. Chem Rev 2018; 118:11118-11193. [PMID: 30362737 DOI: 10.1021/acs.chemrev.7b00660] [Citation(s) in RCA: 106] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Metallo-oxide (MO)-based bioinorganic nanocomposites promise unique structures, physicochemical properties, and novel biochemical functionalities, and within the past decade, investment in research on materials such as ZnO, TiO2, SiO2, and GeO2 has significantly increased. Besides traditional approaches, the synthesis, shaping, structural patterning, and postprocessing chemical functionalization of the materials surface is inspired by strategies which mimic processes in nature. Would such materials deliver new technologies? Answering this question requires the merging of historical knowledge and current research from different fields of science. Practically, we need an effective defragmentation of the research area. From our perspective, the superficial accounting of material properties, chemistry of the surfaces, and the behavior of biomolecules next to such surfaces is a problem. This is particularly of concern when we wish to bridge between technologies in vitro and biotechnologies in vivo. Further, besides the potential practical technological efficiency and advantages such materials might exhibit, we have to consider the wider long-term implications of material stability and toxicity. In this contribution, we present a critical review of recent advances in the chemistry and engineering of MO-based biocomposites, highlighting the role of interactions at the interface and the techniques by which these can be studied. At the end of the article, we outline the challenges which hamper progress in research and extrapolate to developing and promising directions including additive manufacturing and synthetic biology that could benefit from molecular level understanding of interactions occurring between inanimate (abiotic) and living (biotic) materials.
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Affiliation(s)
- Marion J Limo
- Interdisciplinary Biomedical Research Centre, School of Science and Technology , Nottingham Trent University , Clifton Lane, Nottingham NG11 8NS , United Kingdom.,Interface and Surface Analysis Centre, School of Pharmacy , University of Nottingham , University Park, Nottingham NG7 2RD , United Kingdom
| | - Anna Sola-Rabada
- Interdisciplinary Biomedical Research Centre, School of Science and Technology , Nottingham Trent University , Clifton Lane, Nottingham NG11 8NS , United Kingdom
| | - Estefania Boix
- Interdisciplinary Biomedical Research Centre, School of Science and Technology , Nottingham Trent University , Clifton Lane, Nottingham NG11 8NS , United Kingdom.,Department of Bioproducts and Biosystems , Aalto University , P.O. Box 16100, FI-00076 Aalto , Finland
| | - Veeranjaneyulu Thota
- Interdisciplinary Biomedical Research Centre, School of Science and Technology , Nottingham Trent University , Clifton Lane, Nottingham NG11 8NS , United Kingdom
| | - Zayd C Westcott
- Interdisciplinary Biomedical Research Centre, School of Science and Technology , Nottingham Trent University , Clifton Lane, Nottingham NG11 8NS , United Kingdom
| | - Valeria Puddu
- Interdisciplinary Biomedical Research Centre, School of Science and Technology , Nottingham Trent University , Clifton Lane, Nottingham NG11 8NS , United Kingdom
| | - Carole C Perry
- Interdisciplinary Biomedical Research Centre, School of Science and Technology , Nottingham Trent University , Clifton Lane, Nottingham NG11 8NS , United Kingdom
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119
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Kováčová M, Marković ZM, Humpolíček P, Mičušík M, Švajdlenková H, Kleinová A, Danko M, Kubát P, Vajďák J, Capáková Z, Lehocký M, Münster L, Todorović Marković BM, Špitalský Z. Carbon Quantum Dots Modified Polyurethane Nanocomposite as Effective Photocatalytic and Antibacterial Agents. ACS Biomater Sci Eng 2018; 4:3983-3993. [PMID: 33418799 DOI: 10.1021/acsbiomaterials.8b00582] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Development of new types of antibacterial coatings or nanocomposites is of great importance due to widespread multidrug-resistant infections including bacterial infections. Herein, we investigated biocompatibility as well as structural, photocatalytic, and antibacterial properties of photoactive hydrophobic carbon quantum dots/polyurethane nanocomposite. The swell-encapsulation-shrink method was applied for production of these nanocomposites. Hydrophobic carbon quantum dots/polyurethane nanocomposites were found to be highly effective generator of singlet oxygen upon irradiation by low-power blue light. Analysis of conducted antibacterial tests on Staphyloccocus aureus and Escherichia coli showed 5-log bactericidal effect of these nanocomposites within 60 min of irradiation. Very powerful degradation of dye (rose bengal) was observed within 180 min of blue light irradiation of the nanocomposites. Biocompatibility studies revealed that nanocomposites were not cytotoxic against mouse embryonic fibroblast cell line, whereas they showed moderate cytotoxicity toward adenocarcinomic human epithelial cell line. Minor hemolytic effect of these nanocomposites toward red blood cells was revealed.
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Affiliation(s)
- Mária Kováčová
- Polymer Institute, Slovak Academy of Sciences, Dúbravská cestá 9, 84541 Bratislava, Slovakia
| | - Zoran M Marković
- Polymer Institute, Slovak Academy of Sciences, Dúbravská cestá 9, 84541 Bratislava, Slovakia.,Vinča Institute of Nuclear Sciences, University of Belgrade, Mike Alasa 12-14, 11001 Belgrade, Serbia
| | - Petr Humpolíček
- Centre of Polymer Systems, Tomas Bata University in Zlín, Trida Tomase Bati, 5678 Zlín, Czech Republic
| | - Matej Mičušík
- Polymer Institute, Slovak Academy of Sciences, Dúbravská cestá 9, 84541 Bratislava, Slovakia
| | - Helena Švajdlenková
- Polymer Institute, Slovak Academy of Sciences, Dúbravská cestá 9, 84541 Bratislava, Slovakia
| | - Angela Kleinová
- Polymer Institute, Slovak Academy of Sciences, Dúbravská cestá 9, 84541 Bratislava, Slovakia
| | - Martin Danko
- Polymer Institute, Slovak Academy of Sciences, Dúbravská cestá 9, 84541 Bratislava, Slovakia
| | - Pavel Kubát
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, 182 23 Praha 8, Czech Republic
| | - Jan Vajďák
- Centre of Polymer Systems, Tomas Bata University in Zlín, Trida Tomase Bati, 5678 Zlín, Czech Republic
| | - Zdenka Capáková
- Centre of Polymer Systems, Tomas Bata University in Zlín, Trida Tomase Bati, 5678 Zlín, Czech Republic
| | - Marián Lehocký
- Centre of Polymer Systems, Tomas Bata University in Zlín, Trida Tomase Bati, 5678 Zlín, Czech Republic
| | - Lukaš Münster
- Centre of Polymer Systems, Tomas Bata University in Zlín, Trida Tomase Bati, 5678 Zlín, Czech Republic
| | | | - Zdeno Špitalský
- Polymer Institute, Slovak Academy of Sciences, Dúbravská cestá 9, 84541 Bratislava, Slovakia
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120
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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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121
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Gatto F, Bardi G. Metallic Nanoparticles: General Research Approaches to Immunological Characterization. NANOMATERIALS 2018; 8:nano8100753. [PMID: 30248990 PMCID: PMC6215296 DOI: 10.3390/nano8100753] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Revised: 09/18/2018] [Accepted: 09/19/2018] [Indexed: 12/12/2022]
Abstract
Our immunity is guaranteed by a complex system that includes specialized cells and active molecules working in a spatially and temporally coordinated manner. Interaction of nanomaterials with the immune system and their potential immunotoxicity are key aspects for an exhaustive biological characterization. Several assays can be used to unravel the immunological features of nanoparticles, each one giving information on specific pathways leading to immune activation or immune suppression. Size, shape, and surface chemistry determine the surrounding corona, mainly formed by soluble proteins, hence, the biological identity of nanoparticles released in cell culture conditions or in a living organism. Here, we review the main laboratory characterization steps and immunological approaches that can be used to understand and predict the responses of the immune system to frequently utilized metallic or metal-containing nanoparticles, in view of their potential uses in diagnostics and selected therapeutic treatments.
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Affiliation(s)
- Francesca Gatto
- Istituto Italiano di Tecnologia, Nanobiointeractions & Nanodiagnostics, Via Morego 30, 16163 Genova, Italy.
| | - Giuseppe Bardi
- Istituto Italiano di Tecnologia, Nanobiointeractions & Nanodiagnostics, Via Morego 30, 16163 Genova, Italy.
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122
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Visnapuu M, Rosenberg M, Truska E, Nõmmiste E, Šutka A, Kahru A, Rähn M, Vija H, Orupõld K, Kisand V, Ivask A. UVA-induced antimicrobial activity of ZnO/Ag nanocomposite covered surfaces. Colloids Surf B Biointerfaces 2018; 169:222-232. [DOI: 10.1016/j.colsurfb.2018.05.009] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Revised: 04/16/2018] [Accepted: 05/04/2018] [Indexed: 11/26/2022]
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123
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Mohandas A, Deepthi S, Biswas R, Jayakumar R. Chitosan based metallic nanocomposite scaffolds as antimicrobial wound dressings. Bioact Mater 2018; 3:267-277. [PMID: 29744466 PMCID: PMC5935789 DOI: 10.1016/j.bioactmat.2017.11.003] [Citation(s) in RCA: 115] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2017] [Revised: 11/17/2017] [Accepted: 11/17/2017] [Indexed: 12/20/2022] Open
Abstract
Chitosan based nanocomposite scaffolds have attracted wider applications in medicine, in the area of drug delivery, tissue engineering and wound healing. Chitosan matrix incorporated with nanometallic components has immense potential in the area of wound dressings due to its antimicrobial properties. This review focuses on the different combinations of Chitosan metal nanocomposites such as Chitosan/nAg, Chitosan/nAu, Chitosan/nCu, Chitosan/nZnO and Chitosan/nTiO2 towards enhancement of healing or infection control with special reference to the antimicrobial mechanism of action and toxicity.
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Affiliation(s)
| | | | | | - R. Jayakumar
- Centre for Nanosciences and Molecular Medicine, Amrita Institute of Medical Sciences and Research Center, Amrita Vishwa Vidyapeetham, Kochi, 682 041, India
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124
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Scalable novel PVDF based nanocomposite foam for direct blood contact and cardiac patch applications. J Mech Behav Biomed Mater 2018; 88:270-280. [PMID: 30196182 DOI: 10.1016/j.jmbbm.2018.08.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Revised: 08/13/2018] [Accepted: 08/19/2018] [Indexed: 11/23/2022]
Abstract
Scalable novel beta phase polyvinylidene fluoride-poly(methyl methacrylate) (PVDF-PMMA) polymer blend based nanocomposite foam with hydroxyapatite (HAp) and titanium dioxide (TiO2) as nanofillers (β-PVDF-PMMA/HAp/TiO2) (β-PPHT-f), was prepared by using salt etching assisted solution casting method. The prepared β-PPHT-f nanocomposite material was characterized using XRD, FT-IR, SEM-EDS. The XRD and FTIR results confirmed the formation of β phase of β-PPHT-f. The SEM and EDS results confirmed the formation of high porous structured closed cell type morphology of β-PPHT-f. It also, confirmed the uniform distribution of Ti, Ca, P, N and O, in β-PPHT-f. Contact angle measurements performed using sessile drop method with water and EDTA treated blood (EDTA blood) as probe liquids revealed that β-PPHT-f is hydrophilic with contact angle of 48.2° as well as hemophilic with contact angle of 13.7°. Porosity, fluid absorption and retention investigation by gravimetric analysis revealed that β-PPHT-f was 89.2% porous and can absorb and retain 139.15% and 87.05% of water and blood, respectively. The hemolysis assay performed as per ASTM F756 procedure revealed that β-PPHT-f is non hemolytic. Also, the Leishman stained blood smears prepared from whole blood incubated with β-PPHT-f for 3, 4, 5 and 6 h at 37 °C revealed that the blood cells were not affected by β-PPHT-f, its surface morphology and elemental composition. H9c2 cell line studies on a transparent film prepared using β-PPHT-f revealed that the elemental composition of the nanocomposite favored H9c2 cell adhesion and differentiation. All the characterization results indicate that the newly developed scalable novel β-PPHT-f is hemocompatible and cardiomyocyte compatible, suggesting it as a useful material for direct blood contact and cardiac patch applications.
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125
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Peddinti BST, Scholle F, Ghiladi RA, Spontak RJ. Photodynamic Polymers as Comprehensive Anti-Infective Materials: Staying Ahead of a Growing Global Threat. ACS APPLIED MATERIALS & INTERFACES 2018; 10:25955-25959. [PMID: 30044089 DOI: 10.1021/acsami.8b09139] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
To combat the global threat posed by surface-adhering pathogens that are becoming increasingly drug-resistant, we explore the anti-infective efficacy of bulk thermoplastic elastomer films containing ∼1 wt % zinc-tetra(4- N-methylpyridyl)porphine (ZnTMPyP4+), a photoactive antimicrobial that utilizes visible light to generate singlet oxygen. This photodynamic polymer is capable of inactivating five bacterial strains and two viruses with at least 99.89% and 99.95% success, respectively, after exposure to noncoherent light for 60 min. Unlike other anti-infective methodologies commonly requiring oxidizing chemicals, carcinogenic radiation, or toxic nanoparticles, our approach is nonspecific and safe/nontoxic, and sustainably relies on the availability of just oxygen and visible light.
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126
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Orapiriyakul W, Young PS, Damiati L, Tsimbouri PM. Antibacterial surface modification of titanium implants in orthopaedics. J Tissue Eng 2018; 9:2041731418789838. [PMID: 30083308 PMCID: PMC6071164 DOI: 10.1177/2041731418789838] [Citation(s) in RCA: 75] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Accepted: 06/29/2018] [Indexed: 12/18/2022] Open
Abstract
The use of biomaterials in orthopaedics for joint replacement, fracture healing and bone regeneration is a rapidly expanding field. Infection of these biomaterials is a major healthcare burden, leading to significant morbidity and mortality. Furthermore, the cost to healthcare systems is increasing dramatically. With advances in implant design and production, research has predominately focussed on osseointegration; however, modification of implant material, surface topography and chemistry can also provide antibacterial activity. With the increasing burden of infection, it is vitally important that we consider the bacterial interaction with the biomaterial and the host when designing and manufacturing future implants. During this review, we will elucidate the interaction between patient, biomaterial surface and bacteria. We aim to review current and developing surface modifications with a view towards antibacterial orthopaedic implants for clinical applications.
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Affiliation(s)
- Wich Orapiriyakul
- Centre for the Cellular Microenvironment, College of Medical, Veterinary & Life Sciences, Institute of Molecular, Cell and Systems Biology, University of Glasgow, Glasgow, UK
| | - Peter S Young
- Centre for the Cellular Microenvironment, College of Medical, Veterinary & Life Sciences, Institute of Molecular, Cell and Systems Biology, University of Glasgow, Glasgow, UK
| | - Laila Damiati
- Centre for the Cellular Microenvironment, College of Medical, Veterinary & Life Sciences, Institute of Molecular, Cell and Systems Biology, University of Glasgow, Glasgow, UK
| | - Penelope M Tsimbouri
- Centre for the Cellular Microenvironment, College of Medical, Veterinary & Life Sciences, Institute of Molecular, Cell and Systems Biology, University of Glasgow, Glasgow, UK
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127
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Matharu RK, Ciric L, Edirisinghe M. Nanocomposites: suitable alternatives as antimicrobial agents. NANOTECHNOLOGY 2018; 29:282001. [PMID: 29620531 DOI: 10.1088/1361-6528/aabbff] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The exploration of nanocomposites has gained a strong research following over the last decade. These materials have been heavily exploited in several fields, with applications ranging from biosensors to biomedicine. Among these applications, great advances have been made in the field of microbiology, specifically as antimicrobial agents. This review aims to provide a comprehensive account of various nanocomposites that elucidate promising antimicrobial activity. The composition, physical and chemical properties, as well as the antimicrobial performance of these nanocomposites, are discussed in detail.
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Affiliation(s)
- Rupy Kaur Matharu
- Department of Mechanical Engineering, University College London, Torrington Place, London, WC1E 7JE, United Kingdom. Department of Civil, Environmental & Geomatic Engineering, University College London, Chadwick Building, Gower Street, London, WC1E 6BT, United Kingdom
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128
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Arisoy FD, Kolewe KW, Homyak B, Kurtz IS, Schiffman JD, Watkins JJ. Bioinspired Photocatalytic Shark-Skin Surfaces with Antibacterial and Antifouling Activity via Nanoimprint Lithography. ACS APPLIED MATERIALS & INTERFACES 2018; 10:20055-20063. [PMID: 29790348 PMCID: PMC6013830 DOI: 10.1021/acsami.8b05066] [Citation(s) in RCA: 77] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
By combining antifouling shark-skin patterns with antibacterial titanium dioxide (TiO2) nanoparticles (NPs), we present a simple route toward producing durable multifunctional surfaces that decrease microbial attachment and inactivate attached microorganisms. Norland Optical Adhesive, a UV-crosslinkable adhesive material, was loaded with 0, 10, or 50 wt % TiO2 NPs from which shark-skin microstructures were imprinted using solvent-assisted soft nanoimprint lithography on a poly(ethylene terephthalate) (PET) substrate. To obtain coatings with an exceptional durability and an even higher concentration of TiO2 NPs, a solution containing 90 wt % TiO2 NPs and 10 wt % tetraethyl orthosilicate was prepared. These ceramic shark-skin-patterned surfaces were fabricated on a PET substrate and were quickly cured, requiring only 10 s of near infrared (NIR) irradiation. The water contact angle and the mechanical, antibacterial, and antifouling characteristics of the shark-skin-patterned surfaces were investigated as a function of TiO2 composition. Introducing TiO2 NPs increased the contact angle hysteresis from 30 to 100° on shark-skin surfaces. The hardness and modulus of the films were dramatically increased from 0.28 and 4.8 to 0.49 and 16 GPa, respectively, by creating ceramic shark-skin surfaces with 90 wt % TiO2 NPs. The photocatalytic shark-skin-patterned surfaces reduced the attachment of Escherichia coli by ∼70% compared with smooth films with the same chemical composition. By incorporating as low as 10 wt % TiO2 NPs into the chemical matrix, over 95% E. coli and up to 80% Staphylococcus aureus were inactivated within 1 h UV light exposure because of the photocatalytic properties of TiO2. The photocatalytic shark-skin-patterned surfaces presented here were fabricated using a solution-processable and roll-to-roll compatible technique, enabling the production of large-area high-performance coatings that repel and inactivate bacteria.
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Affiliation(s)
- Feyza Dundar Arisoy
- Department of Polymer Science and Engineering, University of Massachusetts Amherst, Amherst, Massachusetts 01003, United States
| | - Kristopher W. Kolewe
- Department of Chemical Engineering, University of Massachusetts Amherst, Amherst, Massachusetts 01003, United States
| | - Benjamin Homyak
- Department of Polymer Science and Engineering, University of Massachusetts Amherst, Amherst, Massachusetts 01003, United States
| | - Irene S. Kurtz
- Department of Chemical Engineering, University of Massachusetts Amherst, Amherst, Massachusetts 01003, United States
| | - Jessica D. Schiffman
- Department of Chemical Engineering, University of Massachusetts Amherst, Amherst, Massachusetts 01003, United States
| | - James J. Watkins
- Department of Polymer Science and Engineering, University of Massachusetts Amherst, Amherst, Massachusetts 01003, United States
- Corresponding Author:
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129
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Radhakrishnan VS, Reddy Mudiam MK, Kumar M, Dwivedi SP, Singh SP, Prasad T. Silver nanoparticles induced alterations in multiple cellular targets, which are critical for drug susceptibilities and pathogenicity in fungal pathogen ( Candida albicans). Int J Nanomedicine 2018; 13:2647-2663. [PMID: 29760548 PMCID: PMC5937493 DOI: 10.2147/ijn.s150648] [Citation(s) in RCA: 82] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Purpose A significant increase in the incidence of fungal infections and drug resistance has been observed in the past decades due to limited availability of broad-spectrum antifungal drugs. Nanomedicines have shown significant antimicrobial potential against various drug-resistant microbes. Silver nanoparticles (AgNps) are known for their antimicrobial properties and lower host toxicity; however, for clinical applications, evaluation of their impact at cellular and molecular levels is essential. The present study aims to understand the cellular and molecular mechanisms of AgNp-induced toxicity in a common fungal pathogen, Candida albicans. Methods AgNps were synthesized by chemical reduction method and characterized using UV-visible spectroscopy, X-ray powder diffraction, transmission electron microscopy, scanning electron microscopy-energy dispersive X-ray spectroscopy, energy dispersive X-ray fluorescence, and zeta potential. The anti-Candida activity of AgNps was assessed by broth microdilution and spot assays. Effects of AgNps on cellular and molecular targets were assessed by monitoring the intracellular reactive oxygen species (ROS) production in the absence and presence of natural antioxidant, changes in surface morphology, cellular ultrastructure, membrane microenvironment, membrane fluidity, membrane ergosterol, and fatty acids. Results Spherical AgNps (10-30 nm) showed minimum inhibitory concentration (minimum concentration required to inhibit the growth of 90% of organisms) at 40 μg/mL. Our results demonstrated that AgNps induced dose-dependent intracellular ROS which exerted antifungal effects; however, even scavenging ROS by antioxidant could not offer protection from AgNp mediated killing. Treatment with AgNps altered surface morphology, cellular ultrastructure, membrane microenvironment, membrane fluidity, ergosterol content, and fatty acid composition, especially oleic acid. Conclusion To summarize, AgNps affected multiple cellular targets crucial for drug resistance and pathogenicity in the fungal cells. The study revealed new cellular targets of AgNps which include fatty acids like oleic acid, vital for hyphal morphogenesis (a pathogenic trait of Candida). Yeast to hypha transition being pivotal for virulence and biofilm formation, targeting virulence might emerge as a new paradigm for developing nano silver-based therapy for clinical applications in fungal therapeutics.
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Affiliation(s)
- Venkatraman Srinivasan Radhakrishnan
- Advanced Instrumentation Research and Facility (AIRF), Jawaharlal Nehru University (JNU), New Delhi, Delhi, India.,Special Centre for Nano Sciences (SCNS), Jawaharlal Nehru University (JNU), New Delhi, Delhi, India
| | - Mohana Krishna Reddy Mudiam
- Analytical Chemistry Lab, Council for Scientific and Industrial Research (CSIR)-Indian Institute of Toxicology Research (IITR), Lucknow, Uttar Pradesh, India
| | - Manish Kumar
- Advanced Instrumentation Research and Facility (AIRF), Jawaharlal Nehru University (JNU), New Delhi, Delhi, India.,Special Centre for Nano Sciences (SCNS), Jawaharlal Nehru University (JNU), New Delhi, Delhi, India
| | | | | | - Tulika Prasad
- Advanced Instrumentation Research and Facility (AIRF), Jawaharlal Nehru University (JNU), New Delhi, Delhi, India.,Special Centre for Nano Sciences (SCNS), Jawaharlal Nehru University (JNU), New Delhi, Delhi, India
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130
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Pareek V, Gupta R, Panwar J. Do physico-chemical properties of silver nanoparticles decide their interaction with biological media and bactericidal action? A review. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 90:739-749. [PMID: 29853145 DOI: 10.1016/j.msec.2018.04.093] [Citation(s) in RCA: 99] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Revised: 04/02/2018] [Accepted: 04/30/2018] [Indexed: 02/01/2023]
Abstract
The unprecedented increase in antibiotic resistance in this era has resuscitated the attention of scientific community to exploit silver and its various species as antimicrobial agents. Plenty of studies have been done to measure the antimicrobial potential of silver species (cationic silver, metallic Ag0 or silver nanoparticles, silver oxide particulates etc.) and indicated that membrane damage, oxidative stress, protein dysfunction and DNA damage to be the possible cause of injury to the microbial cell. However, the precise molecular mechanism of their mode of action has remained unclear, which makes an obstacle towards the generation of potential antibacterial agent against various pathogenic and multidrug resistant (MDR) bacteria. In order to endeavor this issue, one should first have the complete understanding about the resistance mechanisms present in bacteria that can be a therapeutic target for the silver-based drug formulations. Apart from this, in-depth understanding of the interactions of various silver species (with the biological media) is a probable deciding factor for the synthesis of silver-based drug formulations because the particular form and physico-chemical properties of silver can ultimately decide their antimicrobial action. In context to above mentioned serious concerns, the present article aims to discuss the mechanisms behind the confrontation of bacteria against various drugs and the effect of physico-chemical properties of silver species on their bactericidal action as well as critically evaluates the available reports on bacterial transcriptomic and proteomic profiles upon the exposure of various silver species. Further, this review state the mechanism of action that needs to be followed for the complete understanding of toxic potential of silver nanoparticles, which will open a possibility to synthesize new silver nanoparticle based antimicrobial systems with desired properties to ensure their safe use, exposure over extended period and fate in human body and environment.
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Affiliation(s)
- Vikram Pareek
- Department of Biological Sciences, Birla Institute of Technology & Science, Pilani 333031, India
| | - Rinki Gupta
- Department of Biological Sciences, Birla Institute of Technology & Science, Pilani 333031, India
| | - Jitendra Panwar
- Department of Biological Sciences, Birla Institute of Technology & Science, Pilani 333031, India.
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131
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Abstract
Metal oxide materials have been applied in different fields due to their excellent functional properties. Metal oxides nanostructuration, preparation with the various morphologies, and their coupling with other structures enhance the unique properties of the materials and open new perspectives for their application in the food industry. Chemical gas sensors that are based on semiconducting metal oxide materials can detect the presence of toxins and volatile organic compounds that are produced in food products due to their spoilage and hazardous processes that may take place during the food aging and transportation. Metal oxide nanomaterials can be used in food processing, packaging, and the preservation industry as well. Moreover, the metal oxide-based nanocomposite structures can provide many advantageous features to the final food packaging material, such as antimicrobial activity, enzyme immobilization, oxygen scavenging, mechanical strength, increasing the stability and the shelf life of food, and securing the food against humidity, temperature, and other physiological factors. In this paper, we review the most recent achievements on the synthesis of metal oxide-based nanostructures and their applications in food quality monitoring and active and intelligent packaging.
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132
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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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133
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Martínez-Bartolomé S, Medina-Aunon JA, López-García MÁ, González-Tejedo C, Prieto G, Navajas R, Salazar-Donate E, Fernández-Costa C, Yates JR, Albar JP. PACOM: A Versatile Tool for Integrating, Filtering, Visualizing, and Comparing Multiple Large Mass Spectrometry Proteomics Data Sets. J Proteome Res 2018; 17:1547-1558. [DOI: 10.1021/acs.jproteome.7b00858] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Salvador Martínez-Bartolomé
- Proteomics Laboratory, National Center for Biotechnology, CSIC, Madrid 28049, Spain
- Department of Chemical Physiology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | | | | | | | - Gorka Prieto
- Department of Communications Engineering, University of the Basque Country (UPV/EHU), Bilbao 48013, Spain
| | - Rosana Navajas
- Proteomics Laboratory, National Center for Biotechnology, CSIC, Madrid 28049, Spain
| | | | - Carolina Fernández-Costa
- Department of Chemical Physiology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
- Immunology, Centro de Investigaciones Biomédicas (CINBIO), Centro singular de Investigación de Galicia: Instituto de Investigación Sanitaria Galicia Sur (IIS-GS), University of Vigo, Campus Universitario, s/n, Vigo 36310, Spain
| | - John R. Yates
- Department of Chemical Physiology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Juan Pablo Albar
- Proteomics Laboratory, National Center for Biotechnology, CSIC, Madrid 28049, Spain
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134
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Shuai C, Shuai C, Feng P, Gao C, Peng S, Yang Y. Antibacterial Capability, Physicochemical Properties, and Biocompatibility of nTiO₂ Incorporated Polymeric Scaffolds. Polymers (Basel) 2018; 10:E328. [PMID: 30966363 PMCID: PMC6415147 DOI: 10.3390/polym10030328] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Revised: 03/12/2018] [Accepted: 03/13/2018] [Indexed: 12/30/2022] Open
Abstract
Postoperative infection is a common risk which brings about failure in bone transplantation. In this study, nano titanium dioxide (nTiO₂) was incorporated into Polyetheretherketone/polyglycolicacid (PEEK/PGA) blends to construct antibacterial scaffolds via selective laser sintering. Antibacterial capability was assessed using Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus). The results demonstrated that the scaffolds with nTiO₂ presented an effective antibacterial activity, which might be attributed to that nTiO₂ would do the mechanical and oxidative damage to bacteria by occurring contact actions and generating reactive oxygen species (ROS), and thus killed bacteria from structure and function. Moreover, nTiO₂ could enhance the tensile strength and modulus of scaffolds due to the reinforcing effect and its uniform disperse. And the cell culture experiments showed that nTiO₂ stimulated cellular attachment and proliferation. Besides, it also elevated the hydrophily and thermal stability of scaffolds. These results suggested that the polymeric scaffolds incorporated nTiO₂ had potential application in bone tissue engineering.
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Affiliation(s)
- Cijun Shuai
- Jiangxi University of Science and Technology, Ganzhou 341000, China.
- State Key Laboratory of High Performance Complex Manufacturing, College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China.
- Key Laboratory of Organ Injury, Aging and Regenerative Medicine of Hunan Province, Changsha 410008, China.
| | - Chenying Shuai
- State Key Laboratory of High Performance Complex Manufacturing, College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China.
| | - Pei Feng
- State Key Laboratory of High Performance Complex Manufacturing, College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China.
| | - Chengde Gao
- State Key Laboratory of High Performance Complex Manufacturing, College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China.
| | - Shuping Peng
- The Key Laboratory of Carcinogenesis of the Chinese Ministry of Health, Xiangya Hospital, Cancer Research Institute, Central South University, Changsha 410008, China.
| | - Youwen Yang
- Jiangxi University of Science and Technology, Ganzhou 341000, China.
- State Key Laboratory of High Performance Complex Manufacturing, College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China.
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135
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Lee D, Seo Y, Khan MS, Hwang J, Jo Y, Son J, Lee K, Park C, Chavan S, Gilad AA, Choi J. Use of Nanoscale Materials for the Effective Prevention and Extermination of Bacterial Biofilms. BIOTECHNOL BIOPROC E 2018. [DOI: 10.1007/s12257-017-0348-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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136
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Popok VN, Jeppesen CM, Fojan P, Kuzminova A, Hanuš J, Kylián O. Comparative study of antibacterial properties of polystyrene films with TiO x and Cu nanoparticles fabricated using cluster beam technique. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2018; 9:861-869. [PMID: 29600147 PMCID: PMC5870157 DOI: 10.3762/bjnano.9.80] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Accepted: 02/20/2018] [Indexed: 06/08/2023]
Abstract
Background: Antibacterial materials are of high importance for medicine, and for the production and conservation of food. Among these materials, polymer films with metal nanoparticles (NPs) are of considerable interest for many practical applications. Results: The paper describes a novel approach for the formation of bactericidal polymer thin films (polystyrene in this case), produced by spin-coating, with Ti and Cu NPs deposited from cluster beams. Ti NPs are treated in three different ways in order to study different approaches for oxidation and, thus, efficiency in formation of the particles with semiconducting properties required for the catalytic formation of reactive oxygen species. Cu NPs are used as deposited. Partial NP embedding into polystyrene is realised in a controllable manner using thermal annealing in order to improve surface adhesion and make the particles resistant against wash-out. The formed composite films with TiO x and Cu species are tested as bactericidal media using E.coli bacteria as model microorganisms. Conclusion: The obtained results show considerable efficiency in destroying the bacteria and a good possibility of multiple re-use of the same composite films making the suggested approach attractive for the cases requiring reusable polymer-based antibacterial media.
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Affiliation(s)
- Vladimir N Popok
- Department of Materials and Production, Aalborg University, Skjernvej 4A, 9220 Aalborg, Denmark
| | - Cesarino M Jeppesen
- Department of Materials and Production, Aalborg University, Skjernvej 4A, 9220 Aalborg, Denmark
| | - Peter Fojan
- Department of Materials and Production, Aalborg University, Skjernvej 4A, 9220 Aalborg, Denmark
| | - Anna Kuzminova
- Department of Macromolecular Physics, Charles University, V Holešovičkách 2, 18000 Prague 8, Czech Republic
| | - Jan Hanuš
- Department of Macromolecular Physics, Charles University, V Holešovičkách 2, 18000 Prague 8, Czech Republic
| | - Ondřej Kylián
- Department of Macromolecular Physics, Charles University, V Holešovičkách 2, 18000 Prague 8, Czech Republic
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137
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Mesoporous silica nanoparticles as diagnostic and therapeutic tools: how can they combat bacterial infection? Ther Deliv 2018; 9:241-244. [PMID: 29495945 DOI: 10.4155/tde-2017-0111] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
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138
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Zhang R, Qin Q, Liu B, Qiao L. TiO2-Assisted Laser Desorption/Ionization Mass Spectrometry for Rapid Profiling of Candidate Metabolite Biomarkers from Antimicrobial-Resistant Bacteria. Anal Chem 2018; 90:3863-3870. [PMID: 29461808 DOI: 10.1021/acs.analchem.7b04565] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rutan Zhang
- Department of Chemistry, Shanghai Stomatological Hospital, Fudan University, Shanghai 200000, China
| | - Qin Qin
- The Second Military Medical University, Changhai Hospital, Shanghai 200433, China
| | - Baohong Liu
- Department of Chemistry, Shanghai Stomatological Hospital, Fudan University, Shanghai 200000, China
| | - Liang Qiao
- Department of Chemistry, Shanghai Stomatological Hospital, Fudan University, Shanghai 200000, China
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139
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Skowron K, Grudlewska K, Krawczyk A, Gospodarek-Komkowska E. The effectiveness of radiant catalytic ionization in inactivation of Listeria monocytogenes planktonic and biofilm cells from food and food contact surfaces as a method of food preservation. J Appl Microbiol 2018; 124:1493-1505. [PMID: 29392892 DOI: 10.1111/jam.13715] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2017] [Revised: 01/25/2018] [Accepted: 01/27/2018] [Indexed: 12/19/2022]
Abstract
AIMS The aim of the study was to evaluate the microbicidal effectiveness of radiant catalytic ionization (RCI) against Listeria monocytogenes strains in the form of planktonic cells and biofilm on food products and food contact surfaces as a method of food preservation. METHODS AND RESULTS The study material comprised six strains of L. monocytogenes, isolated from food. Samples of different types of food available by retail (raw carrot, frozen salmon filets, soft cheese) and the fragments of surfaces (stainless steel AISI 304, rubber, milled rock tiles, polypropylene) were used in the experiment. The obtained results showed the effectiveness of RCI in the inactivation of both forms of the tested L. monocytogenes strains on all the surfaces. The effectiveness of RCI for biofilm forms was lower as compared with planktonic forms. The PRR value ranged from 18·19 to 99·97% for planktonic form and from 3·92 to 70·10% for biofilm. CONCLUSIONS The RCI phenomenon induces the inactivation of L. monocytogenes on surfaces of food and materials used in the processing industry to a varying degree, depending on the manner of surface contamination, the properties of the contaminated materials as well as on the origin of the strain and the properties of surrounding dispersive environment in which the micro-organisms were suspended. SIGNIFICANCE AND IMPACT OF THE STUDY Searching of new actions aimed at the reduction of the microbial contamination of food and food contact surfaces are extremely important. RCI method has been already described as an effective technique of microbial and abiotic pollution removal from air. However, our studies provide new, additional data related to evaluation the RCI efficacy against microbes on different surfaces, both in planktonic and biofilm form.
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Affiliation(s)
- K Skowron
- Department of Microbiology, Nicolaus Copernicus University in Toruń, Collegium Medicum of L. Rydygier in Bydgoszcz, Bydgoszcz, Poland
| | - K Grudlewska
- Department of Microbiology, Nicolaus Copernicus University in Toruń, Collegium Medicum of L. Rydygier in Bydgoszcz, Bydgoszcz, Poland
| | - A Krawczyk
- Department of Microbiology, Nicolaus Copernicus University in Toruń, Collegium Medicum of L. Rydygier in Bydgoszcz, Bydgoszcz, Poland
| | - E Gospodarek-Komkowska
- Department of Microbiology, Nicolaus Copernicus University in Toruń, Collegium Medicum of L. Rydygier in Bydgoszcz, Bydgoszcz, Poland
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140
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Verma S, Jha E, Panda PK, Thirumurugan A, Parashar SKS, Patro S, Suar M. Mechanistic Insight into Size-Dependent Enhanced Cytotoxicity of Industrial Antibacterial Titanium Oxide Nanoparticles on Colon Cells Because of Reactive Oxygen Species Quenching and Neutral Lipid Alteration. ACS OMEGA 2018; 3:1244-1262. [PMID: 30023799 PMCID: PMC6044987 DOI: 10.1021/acsomega.7b01522] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Accepted: 01/15/2018] [Indexed: 06/08/2023]
Abstract
This study evaluates the impact of industrially prepared TiO2 nanoparticles on the biological system by using an in vitro model of colon cancer cell lines (HCT116). Industrial synthesis of titanium oxide nanoparticles was mimicked on the lab scale by the high-energy ball milling method by milling bulk titanium oxide particles for 5, 10, and 15 h in an ambient environment. The physiochemical characterization by field emission scanning electron microscopy, dynamic light scattering, and UV-visible spectroscopy revealed alteration in the size and surface charge with respect to increase in the milling time. The size was found to be reduced to 82 ± 14, 66 ± 12, and 42 ± 10 nm in 5, 10, and 15 h milled nano TiO2 from 105 ± 12 nm of bulk TiO2, whereas the zeta potential increased along with the milling time in all biological media. Cytotoxicity and genotoxicity assays performed with HCT116 cell lines by MTT assay, oxidative stress, intracellular lipid analysis, apoptosis, and cell cycle estimation depicted cytotoxicity as a consequence of reactive oxygen species quenching and lipid accumulation, inducing significant apoptosis and genotoxic cytotoxicity. In silico analysis depicted the role of Sod1, Sod2, p53, and VLDR proteins-TiO2 hydrogen bond interaction having a key role in determining the cytotoxicity. The particles exhibited significant antibacterial activities against Escherichia coli and Salmonella typhimurium.
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Affiliation(s)
- Suresh
K. Verma
- School
of Biotechnology, School of Applied Sciences, and Kalinga School of Medical Sciences, KIIT University, Bhubaneswar, Orissa 751024, India
| | - Ealisha Jha
- Department
of Physics and Physical Oceanography, Memorial
University of Newfoundland, St. John’s, Newfoundland and Labrador NL A1C 5S7, Canada
| | - Pritam Kumar Panda
- School
of Biotechnology, School of Applied Sciences, and Kalinga School of Medical Sciences, KIIT University, Bhubaneswar, Orissa 751024, India
| | - Arun Thirumurugan
- Advanced
Materials Laboratory, Department of Mechanical Engineering, Faculty
of Mathematical and Physical Sciences, University
of Chile, Av. Beauchef 851, piso 5, Santiago, Chile
| | - S. K. S. Parashar
- School
of Biotechnology, School of Applied Sciences, and Kalinga School of Medical Sciences, KIIT University, Bhubaneswar, Orissa 751024, India
| | - Shubhransu Patro
- School
of Biotechnology, School of Applied Sciences, and Kalinga School of Medical Sciences, KIIT University, Bhubaneswar, Orissa 751024, India
| | - Mrutyunjay Suar
- School
of Biotechnology, School of Applied Sciences, and Kalinga School of Medical Sciences, KIIT University, Bhubaneswar, Orissa 751024, India
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141
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Zhu Y, Gasilova N, Jović M, Qiao L, Liu B, Lovey LT, Pick H, Girault HH. Detection of antimicrobial resistance-associated proteins by titanium dioxide-facilitated intact bacteria mass spectrometry. Chem Sci 2018; 9:2212-2221. [PMID: 29719694 PMCID: PMC5897883 DOI: 10.1039/c7sc04089j] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Accepted: 01/18/2018] [Indexed: 01/05/2023] Open
Abstract
Titanium dioxide-modified target plates were developed to enhance intact bacteria analysis by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. The plates were designed to photocatalytically destroy the bacterial envelope structure and improve the ionization efficiency of intracellular components, thereby promoting the measurable mass range and the achievable detection sensitivity. Accordingly, a method for rapid detection of antimicrobial resistance-associated proteins, conferring bacterial resistance against antimicrobial drugs, was established by mass spectrometric fingerprinting of intact bacteria without the need for any sample pre-treatment. With this method, the variations in resistance proteins' expression levels within bacteria were quickly measured from the relative peak intensities. This approach of resistance protein detection directly from intact bacteria by mass spectrometry is useful for fast discrimination of antimicrobial-resistant bacteria from their non-resistant counterparts whilst performing species identification. Also, it could be used as a rapid and convenient way for initial determination of the underlying resistance mechanisms.
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Affiliation(s)
- Yingdi Zhu
- Laboratoire d'Electrochimie Physique et Analytique , École Polytechnique Fédérale de Lausanne , Rue de l'industrie 17 , CH-1951 Sion , Switzerland .
| | - Natalia Gasilova
- Laboratoire d'Electrochimie Physique et Analytique , École Polytechnique Fédérale de Lausanne , Rue de l'industrie 17 , CH-1951 Sion , Switzerland . .,ISIC-GE-VS , École Polytechnique Fédérale de Lausanne , Rue de l'industrie 17 , CH-1951 Sion , Switzerland
| | - Milica Jović
- Laboratoire d'Electrochimie Physique et Analytique , École Polytechnique Fédérale de Lausanne , Rue de l'industrie 17 , CH-1951 Sion , Switzerland .
| | - Liang Qiao
- Department of Chemistry , Fudan University , Handan Road 220 , 200433 Shanghai , China
| | - Baohong Liu
- Department of Chemistry , Fudan University , Handan Road 220 , 200433 Shanghai , China
| | | | - Horst Pick
- Laboratoire de Chimie Biophysique des Macromolécules , École Polytechnique Fédérale de Lausanne , CH-1015 Lausanne , Switzerland
| | - Hubert H Girault
- Laboratoire d'Electrochimie Physique et Analytique , École Polytechnique Fédérale de Lausanne , Rue de l'industrie 17 , CH-1951 Sion , Switzerland .
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142
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Mofazzal Jahromi MA, Sahandi Zangabad P, Moosavi Basri SM, Sahandi Zangabad K, Ghamarypour A, Aref AR, Karimi M, Hamblin MR. Nanomedicine and advanced technologies for burns: Preventing infection and facilitating wound healing. Adv Drug Deliv Rev 2018; 123:33-64. [PMID: 28782570 PMCID: PMC5742034 DOI: 10.1016/j.addr.2017.08.001] [Citation(s) in RCA: 250] [Impact Index Per Article: 41.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Revised: 07/20/2017] [Accepted: 08/01/2017] [Indexed: 12/11/2022]
Abstract
According to the latest report from the World Health Organization, an estimated 265,000 deaths still occur every year as a direct result of burn injuries. A widespread range of these deaths induced by burn wound happens in low- and middle-income countries, where survivors face a lifetime of morbidity. Most of the deaths occur due to infections when a high percentage of the external regions of the body area is affected. Microbial nutrient availability, skin barrier disruption, and vascular supply destruction in burn injuries as well as systemic immunosuppression are important parameters that cause burns to be susceptible to infections. Topical antimicrobials and dressings are generally employed to inhibit burn infections followed by a burn wound therapy, because systemic antibiotics have problems in reaching the infected site, coupled with increasing microbial drug resistance. Nanotechnology has provided a range of molecular designed nanostructures (NS) that can be used in both therapeutic and diagnostic applications in burns. These NSs can be divided into organic and non-organic (such as polymeric nanoparticles (NPs) and silver NPs, respectively), and many have been designed to display multifunctional activity. The present review covers the physiology of skin, burn classification, burn wound pathogenesis, animal models of burn wound infection, and various topical therapeutic approaches designed to combat infection and stimulate healing. These include biological based approaches (e.g. immune-based antimicrobial molecules, therapeutic microorganisms, antimicrobial agents, etc.), antimicrobial photo- and ultrasound-therapy, as well as nanotechnology-based wound healing approaches as a revolutionizing area. Thus, we focus on organic and non-organic NSs designed to deliver growth factors to burned skin, and scaffolds, dressings, etc. for exogenous stem cells to aid skin regeneration. Eventually, recent breakthroughs and technologies with substantial potentials in tissue regeneration and skin wound therapy (that are as the basis of burn wound therapies) are briefly taken into consideration including 3D-printing, cell-imprinted substrates, nano-architectured surfaces, and novel gene-editing tools such as CRISPR-Cas.
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Affiliation(s)
- Mirza Ali Mofazzal Jahromi
- Department of Advanced Medical Sciences & Technologies, School of Medicine, Jahrom University of Medical Sciences (JUMS), Jahrom, Iran; Research Center for Noncommunicable Diseases, School of Medicine, Jahrom University of Medical Sciences (JUMS), Jahrom, Iran
| | - Parham Sahandi Zangabad
- Research Center for Pharmaceutical Nanotechnology (RCPN), Tabriz University of Medical Science (TUOMS), Tabriz, Iran; Cellular and Molecular Research Center, Iran University of Medical Sciences, Tehran, Iran; Bio-Nano-Interfaces: Convergence of Sciences (BNICS), Universal Scientific Education and Research Network (USERN), Tehran, Iran; Department of Medical Nanotechnology, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Seyed Masoud Moosavi Basri
- Bio-Nano-Interfaces: Convergence of Sciences (BNICS), Universal Scientific Education and Research Network (USERN), Tehran, Iran; Bioenvironmental Research Center, Sharif University of Technology, Tehran, Iran; Civil & Environmental Engineering Department, Shahid Beheshti University, Tehran, Iran
| | - Keyvan Sahandi Zangabad
- Bio-Nano-Interfaces: Convergence of Sciences (BNICS), Universal Scientific Education and Research Network (USERN), Tehran, Iran; Department of Polymer Engineering, Sahand University of Technology, PO Box 51335-1996, Tabriz, Iran; Nanomedicine Research Association (NRA), Universal Scientific Education and Research Network (USERN), Tehran, Iran
| | - Ameneh Ghamarypour
- Bio-Nano-Interfaces: Convergence of Sciences (BNICS), Universal Scientific Education and Research Network (USERN), Tehran, Iran; Department of Biology, Science and Research Branch, Islamic Azad university, Tehran, Iran
| | - Amir R Aref
- Department of Medical Oncology, Belfer Center for Applied Cancer Science, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02215, USA
| | - Mahdi Karimi
- Cellular and Molecular Research Center, Iran University of Medical Sciences, Tehran, Iran; Department of Medical Nanotechnology, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, Iran; Research Center for Science and Technology in Medicine, Tehran University of Medical Sciences, Tehran, Iran; Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, Boston, USA.
| | - Michael R Hamblin
- Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, Boston, USA; Department of Dermatology, Harvard Medical School, Boston, USA; Harvard-MIT Division of Health Sciences and Technology, Cambridge, USA.
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143
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Abdulrazzaq Naji S, Jafarzadeh Kashi TS, Pourhajibagher M, Behroozibakhsh M, Masaeli R, Bahador A. Evaluation of Antimicrobial Properties of Conventional Poly(Methyl Methacrylate) Denture Base Resin Materials Containing Hydrothermally Synthesised Anatase TiO 2 Nanotubes against Cariogenic Bacteria and Candida albicans. IRANIAN JOURNAL OF PHARMACEUTICAL RESEARCH : IJPR 2018; 17:161-172. [PMID: 31011350 PMCID: PMC6447881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The purpose of this study was to investigate the antimicrobial properties of a conventional poly methyl methacrylate (PMMA) modified with hydrothermally synthesised titanium dioxide nanotubes (TNTs). Minimum inhibitory concentration (MIC), minimum bactericidal concentration (MBC), and minimum fungicidal concentrations (MFC) for planktonic cells of the TiO2 nanotubes solution against Lactobacillus acidophilus, Streptococcus mutans and Candida albicans were determined. The powder of conventional acrylic resin was modified using 2.5% and 5% by weight synthesised titanium dioxide (TiO2) nanotubes, and rectangular-shaped specimens (10 mm × 10 mm × 3 mm) were fabricated. The antimicrobial properties of ultraviolet (UV) and non-UV irradiated modified, and non-modified acrylic resins were evaluated using the estimation of planktonic cell count and biofilm formation of the three microorganisms mentioned above. The data were analysed by one-way analysis of variance (ANOVA), followed by a post-hoc Tukey's test at a significance level of 5%. MIC, for Streptococcus. mutans, Lactobacillus. acidophilus, and Candida. albicans, MBC for S. mutans and L. acidophilus and MFC for Candida. albicans were obtained more than 2100 µg/mL. The results of this study indicated a significant reduction in both planktonic cell count and biofilm formation of modified UV-activated acrylic specimens compared with the control group (p = 0.00). According to the results of the current study, it can be concluded that PMMA/TiO2 nanotube composite can be considered as a promising new material for antimicrobial approaches.
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Affiliation(s)
- Sahar Abdulrazzaq Naji
- Foundation of Technical Education, College of Health and Medical Technology, Baghdad, Iraq.,Department of Dental Biomaterials, School of Dentistry, International Campus, Tehran University of Medical Sciences (IC-TUMS), Tehran, Iran.
| | - Tahereh Sadat Jafarzadeh Kashi
- Department of Dental Biomaterials, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran. ,Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran.
| | - Maryam Pourhajibagher
- Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran.,Dental Implant Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran.,Department of Microbiology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran.
| | - Marjan Behroozibakhsh
- Department of Dental Biomaterials, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran. ,Research Center for Science and Technology in Medicine, Tehran University of Medical Sciences, Tehran, Iran.,Corresponding author: E-mail:
| | - Reza Masaeli
- Department of Dental Biomaterials, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran. ,Research Center for Science and Technology in Medicine, Tehran University of Medical Sciences, Tehran, Iran.
| | - Abbas Bahador
- Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran.,Department of Microbiology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran.
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144
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Ong HR, Khan MMR, Ramli R, Yunus RM, Rahman MW, Hong CS, Ahmad MS. Formation of CuO Nanoparticle in Glycerol and Its Catalytic Activity for Alkyd Resin Synthesis. ACTA ACUST UNITED AC 2018. [DOI: 10.1016/j.matpr.2018.01.124] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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145
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JAK/STAT and TGF-ß activation as potential adverse outcome pathway of TiO 2NPs phototoxicity in Caenorhabditis elegans. Sci Rep 2017; 7:17833. [PMID: 29259193 PMCID: PMC5736661 DOI: 10.1038/s41598-017-17495-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Accepted: 11/27/2017] [Indexed: 12/31/2022] Open
Abstract
Titanium dioxide nanoparticles (TiO2NPs) are widely used nanoparticles, whose catalytic activity is mainly due to photoactivation. In this study, the toxicity of TiO2NPs was investigated on the nematode Caenorhabditis elegans, with and without UV activation. Comparative analyses across the four treatments revealed that UV-activated TiO2NPs led to significant reproductive toxicity through oxidative stress. To understand the underlying molecular mechanism, transcriptomics and metabolomics analyses were conducted, followed by whole-genome network-based pathway analyses. Differential expression analysis from microarray data revealed only 4 DEGs by exposure to TiO2NPs alone, compared to 3,625 and 3,286 DEGs by UV alone and UV-activated TiO2NPs, respectively. Pathway analyses suggested the possible involvement of the JAK/STAT and TGF-ß pathways in the phototoxicity of TiO2NPs, which correlated with the observation of increased gene expression of those pathways. Comparative analysis of C. elegans response across UV activation and TiO2NPs exposure was performed using loss-of-function mutants of genes in these pathways. Results indicated that the JAK/STAT pathway was specific to TiO2NPs, whereas the TGF-ß pathway was specific to UV. Interestingly, crosstalk between these pathways was confirmed by further mutant analysis. We consider that these findings will contribute to understand the molecular mechanisms of toxicity of TiO2NPs in the natural environment.
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146
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Liu L, Bhatia R, Webster TJ. Atomic layer deposition of nano-TiO 2 thin films with enhanced biocompatibility and antimicrobial activity for orthopedic implants. Int J Nanomedicine 2017; 12:8711-8723. [PMID: 29263665 PMCID: PMC5724422 DOI: 10.2147/ijn.s148065] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Titanium (Ti) and its alloys have been extensively used as implant materials in orthopedic applications. Nevertheless, implants may fail due to a lack of osseointegration and/or infection. The aim of this in vitro study was to endow an implant surface with favorable biological properties by the dual modification of surface chemistry and nanostructured topography. The application of a nanostructured titanium dioxide (TiO2) coating on Ti-based implants has been proposed as a potential way to enhance tissue-implant interactions while inhibiting bacterial colonization simultaneously due to its chemical stability, biocompatibility, and antimicrobial properties. In this paper, temperature-controlled atomic layer deposition (ALD) was introduced for the first time to provide unique nanostructured TiO2 coatings on Ti substrates. The effect of nano-TiO2 coatings with different morphology and structure on human osteoblast and fibroblast functions and bacterial activities was investigated. In vitro results indicated that the TiO2 coating stimulated osteoblast adhesion and proliferation while suppressing fibroblast adhesion and proliferation compared to uncoated materials. In addition, the introduction of nano-TiO2 coatings was shown to inhibit gram-positive bacteria (Staphylococcus aureus), gram-negative bacteria (Escherichia coli), and antibiotic-resistant bacteria (methicillin-resistant Staphylococcus aureus), all without resorting to the use of antibiotics. Our results suggest that the increase in nanoscale roughness and greater surface hydrophilicity (surface energy) together could contribute to increased protein adsorption selectively, which may affect the cellular and bacterial activities. It was found that ALD-grown TiO2-coated samples with a moderate surface energy at 38.79 mJ/m2 showed relatively promising antibacterial properties and desirable cellular functions. The ALD technique provides a novel and effective strategy to produce TiO2 coatings with delicate control of surface nanotopography and surface energy to enhance the interfacial biocompatibility and mitigate bacterial infection, and could potentially be used for improving numerous orthopedic implants.
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Affiliation(s)
- Luting Liu
- Department of Chemical Engineering, Northeastern University, Boston
| | | | - Thomas J Webster
- Department of Chemical Engineering, Northeastern University, Boston
- Wenzhou Institute of Biomaterials and Engineering, Wenzhou Medical University, Wenzhou, People’s Republic of China
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147
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Abbas F, Maqbool Q, Nazar M, Jabeen N, Hussain SZ, Anwaar S, Mehmood N, Sheikh MS, Hussain T, Iftikhar S. Green synthesised zinc oxide nanostructures through Periploca aphylla extract shows tremendous antibacterial potential against multidrug resistant pathogens. IET Nanobiotechnol 2017; 11:935-941. [PMID: 29155392 PMCID: PMC8676301 DOI: 10.1049/iet-nbt.2016.0238] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Revised: 06/19/2017] [Accepted: 07/17/2017] [Indexed: 11/09/2023] Open
Abstract
To grapple with multidrug resistant bacterial infections, implementations of antibacterial nanomedicines have gained prime attention of the researchers across the globe. Nowadays, zinc oxide (ZnO) at nano-scale has emerged as a promising antibacterial therapeutic agent. Keeping this in view, ZnO nanostructures (ZnO-NS) have been synthesised through reduction by P. aphylla aqueous extract without the utilisation of any acid or base. Structural examinations via scanning electron microscopy (SEM) and X-ray diffraction have revealed pure phase morphology with highly homogenised average particle size of 18 nm. SEM findings were further supplemented by transmission electron microscopy examinations. The characteristic Zn-O peak has been observed around 363 nm using ultra-violet-visible spectroscopy. Fourier-transform infrared spectroscopy examination has also confirmed the formation of ZnO-NS through detection of Zn-O bond vibration frequencies. To check the superior antibacterial activity of ZnO-NS, the authors' team has performed disc diffusion assay and colony forming unit testing against multidrug resistant E. coli, S. marcescens and E. cloacae. Furthermore, protein kinase inhibition assay and cytotoxicity examinations have revealed that green fabricated ZnO-NS are non-hazardous, economical, environmental friendly and possess tremendous potential to treat lethal infections caused by multidrug resistant pathogens.
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Affiliation(s)
- Fazal Abbas
- Department of Physics, Government Post Graduate College, Chakwal 48800, Pakistan
| | - Qaisar Maqbool
- Preston University, Islamabad Campus, Islamabad, Pakistan.
| | - Mudassar Nazar
- Department of Biotechnology, Virtual University of Pakistan, Lahore 54000, Pakistan
| | - Nyla Jabeen
- Applied Biotechnology and Genetic Engineering Laboratory, Department of Bioinformatics and Biotechnology, International Islamic University, Islamabad, Pakistan
| | - Syed Zaheer Hussain
- Department of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Sadaf Anwaar
- Applied Biotechnology and Genetic Engineering Laboratory, Department of Bioinformatics and Biotechnology, International Islamic University, Islamabad, Pakistan
| | - Nasir Mehmood
- Department of Plant Pathology, PMAS-Arid Agriculture University, Rawalpindi, Pakistan
| | | | - Talib Hussain
- National Institute of Vacuum Science and Technology (NINVAST), Islamabad, Pakistan
| | - Sidra Iftikhar
- Department of Mathematics, Virtual University of Pakistan, Lahore 54000, Pakistan
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148
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Tomacheski D, Pittol M, Simões DN, Ribeiro VF, Santana RMC. Influence of natural ageing on mechanical, thermal and antimicrobial properties of thermoplastic elastomers containing silver nanoparticles and titanium dioxide. Polym Bull (Berl) 2017. [DOI: 10.1007/s00289-017-2245-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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149
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Yamaguchi Y, Usuki S, Kanai Y, Yamatoya K, Suzuki N, Katsumata KI, Terashima C, Suzuki T, Fujishima A, Sakai H, Kudo A, Nakata K. Selective Inactivation of Bacteriophage in the Presence of Bacteria by Use of Ground Rh-Doped SrTiO 3 Photocatalyst and Visible Light. ACS APPLIED MATERIALS & INTERFACES 2017; 9:31393-31400. [PMID: 28872820 DOI: 10.1021/acsami.7b07786] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Bacteriophage (denoted as phage) infection in the bacterial fermentation industry is a major problem, leading to the loss of fermented products such as alcohol and lactic acid. Currently, the prevention of phage infection is limited to biological approaches, which are difficult to apply in an industrial setting. Herein, we report an alternative chemical approach using ground Rh-doped SrTiO3 (denoted as g-STO:Rh) as a visible-light-driven photocatalyst. The g-STO:Rh showed selective inactivation of phage without bactericidal activity when irradiated with visible light (λ > 440 nm). After inactivation, the color of g-STO:Rh changed from gray to purple, suggesting that the Rh valence state partially changed from 3+ to 4+ induced by photocatalysis, as confirmed by diffuse reflectance spectroscopy. To study the effect of the Rh4+ ion on phage inactivation under visible-light irradiation, the survival rate of phage for g-STO:Rh was compared to that for ground Rh,Sb-codoped SrTiO3 (denoted as g-STO:Rh,Sb), where the change of Rh valence state from 3+ to 4+ is almost suppressed under visible-light irradiation due to charge compensation by the Sb5+ ion. Only g-STO:Rh effectively inactivated phage, which indicated that Rh4+ ion induced by photocatalysis particularly contributed to phage inactivation under visible-light irradiation. These results suggested that g-STO:Rh has potential as an antiphage material in bacterial fermentation.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Akihiko Kudo
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science , 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
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150
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Sharma C, Dhiman R, Rokana N, Panwar H. Nanotechnology: An Untapped Resource for Food Packaging. Front Microbiol 2017; 8:1735. [PMID: 28955314 PMCID: PMC5601076 DOI: 10.3389/fmicb.2017.01735] [Citation(s) in RCA: 87] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Accepted: 08/25/2017] [Indexed: 11/24/2022] Open
Abstract
Food commodities are packaged and hygienically transported to protect and preserve them from any un-acceptable alteration in quality, before reaching the end-consumer. Food packaging continues to evolve along-with the innovations in material science and technology, as well as in light of consumer's demand. Presently, the modern consumers of competitive economies demands for food with natural quality, assured safety, minimal processing, extended shelf-life and ready-to-eat concept. Innovative packaging systems, not only ascertains transit preservation and effective distribution, but also facilitates communication at the consumer levels. The technological advances in the domain of food packaging in twenty-first century are mainly chaired by nanotechnology, the science of nano-materials. Nanotechnology manipulates and creates nanometer scale materials, of commercial and scientific relevance. Introduction of nanotechnology in food packaging sector has significantly addressed the food quality, safety and stability concerns. Besides, nanotechnology based packaging intimate's consumers about the real time quality of food product. Additionally, nanotechnology has been explored for controlled release of preservatives/antimicrobials, extending the product shelf life within the package. The promising reports for nanotechnology interventions in food packaging have established this as an independent priority research area. Nanoparticles based food packages offer improved barrier and mechanical properties, along with food preservation and have gained welcoming response from market and end users. In contrary, recent advances and up-liftment in this area have raised various ethical, environmental and safety concerns. Policies and regulation regarding nanoparticles incorporation in food packaging are being reviewed. This review presents the existing knowledge, recent advances, concerns and future applications of nanotechnology in food packaging sector.
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Affiliation(s)
- Chetan Sharma
- Department of Dairy Microbiology, College of Dairy Science and Technology, Guru Angad Dev Veterinary and Animal Sciences UniversityLudhiana, India
| | - Romika Dhiman
- Department of Microbiology, D.A.V. College for GirlsYamuna Nagar, India
| | - Namita Rokana
- Department of Dairy Microbiology, College of Dairy Science and Technology, Guru Angad Dev Veterinary and Animal Sciences UniversityLudhiana, India
| | - Harsh Panwar
- Department of Dairy Microbiology, College of Dairy Science and Technology, Guru Angad Dev Veterinary and Animal Sciences UniversityLudhiana, India
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