101
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Osumi K, Matsuda S, Fujimura N, Matsubara K, Kitago M, Itano O, Ogino C, Shimizu N, Obara H, Kitagawa Y. Acceleration of wound healing by ultrasound activation of TiO2
in Escherichia coli
-infected wounds in mice. J Biomed Mater Res B Appl Biomater 2016; 105:2344-2351. [DOI: 10.1002/jbm.b.33774] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2016] [Revised: 07/22/2016] [Accepted: 08/01/2016] [Indexed: 01/13/2023]
Affiliation(s)
- Koji Osumi
- Department of Surgery; Tokyo Medical Center; Tokyo Japan
| | - Sachiko Matsuda
- Department of Surgery; Keio University School of Medicine; Tokyo Japan
| | - Naoki Fujimura
- Department of Surgery; Keio University School of Medicine; Tokyo Japan
| | - Kentaro Matsubara
- Department of Surgery; Keio University School of Medicine; Tokyo Japan
| | - Minoru Kitago
- Department of Surgery; Keio University School of Medicine; Tokyo Japan
| | - Osamu Itano
- Department of Surgery; Keio University School of Medicine; Tokyo Japan
| | - Chiaki Ogino
- Department of Chemical Science and Engineering, Graduate School of Engineering; Kobe University; Kobe Japan
| | - Nobuaki Shimizu
- Institute of Nature and Environmental Technology, Kanazawa University; Kanazawa Japan
| | - Hideaki Obara
- Department of Surgery; Keio University School of Medicine; Tokyo Japan
| | - Yuko Kitagawa
- Department of Surgery; Keio University School of Medicine; Tokyo Japan
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102
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Zhiyuan L, Shuili Y, Heedeung P, Qingbin Y, Guicai L, Qi L. Impact of titanium dioxide nanoparticles on the bacterial communities of biological activated carbon filter intended for drinking water treatment. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:15574-15583. [PMID: 27126871 DOI: 10.1007/s11356-016-6742-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2015] [Accepted: 04/22/2016] [Indexed: 06/05/2023]
Abstract
Titanium dioxide nanoparticles (TiO2 NPs) are inevitably present in the aquatic environment owing to their increasing production and use. However, knowledge of the potential effects of TiO2 NPs on the treatment of drinking water is scarce. Herein, the effects of two types of anatase TiO2 NPs (TP1, 25 nm; TP2, 100 nm) on the bacterial community in a biological activated carbon (BAC) filter were investigated via quantitative polymerase chain reaction (Q-PCR) analysis, ATP quantification, and 454 pyrosequencing analysis. Both TP1 and TP2 significantly inhibited the bacterial ATP level (p < 0.01) and induced a decrease in the abundance of bacterial 16S rDNA gene copies at doses of 0.1 and 100 mg L(-1). Simultaneously, the diversity and evenness of the bacterial communities were considerably reduced. The relative abundances of bacteria annotated to OTUs from Nitrospira class and Betaproteobacteria class decreased upon TiO2 NP treatment, whereas those of Bacilli class and Gammaproteobacteria class increased. TiO2 NP size showed a greater effect on the bacterial composition than did the dose based on Bray-Curtis distances. These findings identified negative effects of TiO2 NPs on the bacterial community in the BAC filter. Given the fact that BAC filters are used widely in drinking water treatment plants, these results suggested a potential threat by TiO2 NP to drinking water treatment system.
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Affiliation(s)
- Liu Zhiyuan
- State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai, 200092, China
| | - Yu Shuili
- State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai, 200092, China.
- College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China.
| | - Park Heedeung
- School of Civil, Environmental and Architectural Engineering, Korea University, Seoul, 136-714, South Korea
| | - Yuan Qingbin
- State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai, 200092, China
| | - Liu Guicai
- State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai, 200092, China
| | - Li Qi
- State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai, 200092, China
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103
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Liu G, Zhang S, Yang K, Zhu L, Lin D. Toxicity of perfluorooctane sulfonate and perfluorooctanoic acid to Escherichia coli: Membrane disruption, oxidative stress, and DNA damage induced cell inactivation and/or death. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2016; 214:806-815. [PMID: 27155098 DOI: 10.1016/j.envpol.2016.04.089] [Citation(s) in RCA: 94] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2016] [Revised: 04/19/2016] [Accepted: 04/25/2016] [Indexed: 06/05/2023]
Abstract
Perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) are two widely used polyfluorinated compounds (PFCs) and are persistent in the environment. This study for the first time systematically investigated their toxicities and the underlying mechanisms to Escherichia coli. Much higher toxicity was observed for PFOA than PFOS, with the 3 h half growth inhibition concentrations (IC50) determined to be 10.6 ± 1.0 and 374 ± 3 mg L(-1), respectively, while the bacterial accumulation of PFOS was much greater than that of PFOA. The PFC exposures disrupted cell membranes as evidenced by the dose-dependent variations of cell structures (by transmission electron microscopy observations), surface properties (electronegativity, hydrophobicity, and membrane fluidity), and membrane compositions (by gas chromatogram and Fourier transform infrared spectroscopy analyses). The increases in the contents of intracellular reactive oxygen species (ROS) and malondialdehyde and the activity of superoxide dismutase indicated the increment of oxidative stress induced by the PFCs in the bacterial cells. The fact that the cell growth inhibition was mitigated by the addition of ROS scavenger (N-acetyl cysteine) further evidenced the important role of oxidative damage in the toxicities of PFOS and PFOA. Eighteen genes involved in cell division, membrane instability, oxidative stress, and DNA damage of the exposed cells were up or down expressed, indicating the DNA damage by the PFCs. The toxicities of PFOS and PFOA to E. coli were therefore ascribed to the membrane disruption, oxidative stress, and DNA damage induced cell inactivation and/or death. The difference in the bactericidal effect between PFOS and PFOA was supposed to be related to their different dominating toxicity mechanisms, i.e., membrane disruption and oxidative damage, respectively. The outcomes will shed new light on the assessment of ecological effects of PFCs.
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Affiliation(s)
- Gesheng Liu
- Department of Environmental Science, Zhejiang University, Hangzhou 310058, China
| | - Shuai Zhang
- Department of Environmental Science, Zhejiang University, Hangzhou 310058, China
| | - Kun Yang
- Department of Environmental Science, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Zhejiang University, Hangzhou 310058, China
| | - Lizhong Zhu
- Department of Environmental Science, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Zhejiang University, Hangzhou 310058, China
| | - Daohui Lin
- Department of Environmental Science, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Zhejiang University, Hangzhou 310058, China.
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104
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Countering drug resistance, infectious diseases, and sepsis using metal and metal oxides nanoparticles: Current status. Colloids Surf B Biointerfaces 2016; 146:70-83. [PMID: 27259161 DOI: 10.1016/j.colsurfb.2016.05.046] [Citation(s) in RCA: 111] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2016] [Revised: 05/12/2016] [Accepted: 05/16/2016] [Indexed: 12/12/2022]
Abstract
One fourth of the global mortalities is still caused by microbial infections largely due to the development of resistance against conventional antibiotics among pathogens, the resurgence of old infectious diseases and the emergence of hundreds of new infectious diseases. The lack of funds and resources for the discovery of new antibiotics necessitates the search for economic and effective alternative antimicrobial agents. Metal and metal oxide nanoparticles including silver and zinc oxide exhibit remarkable antimicrobial activities against pathogens and hence are one of the most propitious alternative antimicrobial agents. These engineered nanomaterials are approved by regulatory agencies such as USFDA and Korea's FITI, for use as antimicrobial agents, supplementary antimicrobials, food packaging, skin care products, oral hygiene, and for fortifying devices prone to microbial infections. Nevertheless, detailed studies, on molecular and biochemical mechanisms underlying their antimicrobial activity are missing. To take the full advantage of this emerging technology selective antimicrobial activity of these nanoparticles against pathogens should be studied. Optimization of these nanomaterials through functionalization to increase their efficacy and biocompatibility is also required. Urgent in vivo studies on the toxicity of nanomaterials at realistic doses are also needed before their clinical translation.
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105
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Moll J, Okupnik A, Gogos A, Knauer K, Bucheli TD, van der Heijden MGA, Widmer F. Effects of Titanium Dioxide Nanoparticles on Red Clover and Its Rhizobial Symbiont. PLoS One 2016; 11:e0155111. [PMID: 27171465 PMCID: PMC4865228 DOI: 10.1371/journal.pone.0155111] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Accepted: 04/25/2016] [Indexed: 12/03/2022] Open
Abstract
Titanium dioxide nanoparticles (TiO2 NPs) are in consideration to be used in plant protection products. Before these products can be placed on the market, ecotoxicological tests have to be performed. In this study, the nitrogen fixing bacterium Rhizobium trifolii and red clover were exposed to two TiO2 NPs, i.e., P25, E171 and a non-nanomaterial TiO2. Growth of both organisms individually and their symbiotic root nodulation were investigated in liquid and hydroponic systems. While 23 and 18 mg l-1 of E171 and non-nanomaterial TiO2 decreased the growth rate of R. trifolii by 43 and 23% respectively, P25 did not cause effects. Shoot length of red clover decreased between 41 and 62% for all tested TiO2 NPs. In 21% of the TiO2 NP treated plants, no nodules were found. At high concentrations certain TiO2 NPs impaired R. trifolii as well as red clover growth and their symbiosis in the hydroponic systems.
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Affiliation(s)
- Janine Moll
- Institute for Sustainability Sciences ISS, Agroscope, Zurich, Switzerland
- Plant-Microbe-Interactions, Department of Biology, Utrecht University, Utrecht, the Netherlands
| | - Annette Okupnik
- Institute for Sustainability Sciences ISS, Agroscope, Zurich, Switzerland
| | - Alexander Gogos
- Institute for Sustainability Sciences ISS, Agroscope, Zurich, Switzerland
| | - Katja Knauer
- Federal Office for Agriculture FOAG, Berne, Switzerland
| | - Thomas D. Bucheli
- Institute for Sustainability Sciences ISS, Agroscope, Zurich, Switzerland
| | - Marcel G. A. van der Heijden
- Institute for Sustainability Sciences ISS, Agroscope, Zurich, Switzerland
- Plant-Microbe-Interactions, Department of Biology, Utrecht University, Utrecht, the Netherlands
- Institute of Evolutionary Biology and Environmental Studies, University of Zurich, Zurich, Switzerland
| | - Franco Widmer
- Institute for Sustainability Sciences ISS, Agroscope, Zurich, Switzerland
- * E-mail:
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106
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Yamada I, Nomura K, Iwahashi H, Horie M. The effect of titanium dioxide (TiO2) nano-objects, and their aggregates and agglomerates greater than 100nm (NOAA) on microbes under UV irradiation. CHEMOSPHERE 2016; 143:123-127. [PMID: 25956024 DOI: 10.1016/j.chemosphere.2015.04.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2014] [Revised: 04/03/2015] [Accepted: 04/07/2015] [Indexed: 06/04/2023]
Abstract
Today, nanoparticles are used in many products. One of the most common nanoparticles is titanium dioxide (TiO2). These particles generate reactive oxygen species (ROS) upon UV irradiation. Although nanoparticles are very useful in many products, there are concerns about their biological and ecological effects when released into the environment. Thus, it was assessed that the effect of TiO2 nano-objects, and their aggregates and agglomerates greater than 100nm (NOAA) on microbes under UV irradiation by using Escherichia coli and Saccharomyces cerevisiae. ROS generation was evaluated by adding TiO2 nanoparticles and methylene blue to distilled water. We also assessed growth inhibition by adding TiO2 nanoparticles and microbes in minimal agar medium. Moreover, microbial inactivation was assessed by adding TiO2 nanoparticles and microbes to PBS. Upon UV irradiation, TiO2-NOAAs decomposed methylene blue and generated ROS. TiO2-NOAAs also decomposed methylene blue in minimal agar medium under UV irradiation; however, they did not inhibit microbial growth. Surprisingly, TiO2-NOAAs in the medium protect microbes from UV irradiation as colony formation was observed only near TiO2-NOAAs. In PBS, TiO2-NOAAs did not inactivate microbes but instead protected microbes from lethal UV irradiation. These results suggest that the amount of ROS generated by TiO2-NOAAs is not enough to inactivate microbes. In fact, our results suggest that TiO2-NOAAs may protect microbes from UV irradiations.
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Affiliation(s)
- Ikuho Yamada
- Division of Food Science and Life Science, Graduate School of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu, Gifu 501-1193, Japan.
| | - Kazuki Nomura
- Division of Food Science and Life Science, Graduate School of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu, Gifu 501-1193, Japan
| | - Hitoshi Iwahashi
- Division of Food Science and Life Science, Graduate School of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu, Gifu 501-1193, Japan
| | - Masanori Horie
- Health Research Institute, National Institute of Advanced Industrial Science and Technology, 2217-14 Hayashimachi, Takamatsu, Kagawa 761-14, Japan
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107
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Song B, Liu J, Feng X, Wei L, Shao L. A review on potential neurotoxicity of titanium dioxide nanoparticles. NANOSCALE RESEARCH LETTERS 2015; 10:1042. [PMID: 26306536 PMCID: PMC4549355 DOI: 10.1186/s11671-015-1042-9] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Accepted: 07/27/2015] [Indexed: 05/24/2023]
Abstract
As the rapid development of nanotechnology in the past three decades, titanium dioxide nanoparticles (TiO2 NPs), for their peculiar physicochemical properties, are widely applied in consumer products, food additives, cosmetics, drug carriers, and so on. However, little is known about their potential exposure and neurotoxic effects. Once NPs are unintentionally exposed to human beings, they could be absorbed, and then accumulated in the brain regions by passing through the blood-brain barrier (BBB) or through the nose-to-brain pathway, potentially leading to dysfunctions of central nerve system (CNS). Besides, NPs may affect the brain development of embryo by crossing the placental barrier. A few in vivo and in vitro researches have demonstrated that the morphology and function of neuronal or glial cells could be impaired by TiO2 NPs which might induce cell necrosis. Cellular components, such as mitochondrial, lysosome, and cytoskeleton, could also be influenced as well. The recognition ability, spatial memory, and learning ability of TiO2 NPs-treated rodents were significantly impaired, which meant that accumulation of TiO2 NPs in the brain could lead to neurodegeneration. However, conclusions obtained from those studies were not consistent with each other as researchers may choose different experimental parameters, including administration ways, dosage, size, and crystal structure of TiO2 NPs. Therefore, in order to fully understand the potential risks of TiO2 NPs to brain health, figure out research areas where further studies are required, and improve its bio-safety for applications in the near future, how TiO2 NPs interact with the brain is investigated in this review by summarizing the current researches on neurotoxicity induced by TiO2 NPs.
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Affiliation(s)
- Bin Song
- />Guizhou Provincial People’s Hospital, Guiyang, 550002 China
- />Nanfang Hospital, Southern Medical University, Guangzhou, 510515 China
| | - Jia Liu
- />Nanfang Hospital, Southern Medical University, Guangzhou, 510515 China
| | - Xiaoli Feng
- />Nanfang Hospital, Southern Medical University, Guangzhou, 510515 China
| | - Limin Wei
- />Nanfang Hospital, Southern Medical University, Guangzhou, 510515 China
| | - Longquan Shao
- />Nanfang Hospital, Southern Medical University, Guangzhou, 510515 China
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108
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Erdem A, Metzler D, Cha DK, Huang CP. The short-term toxic effects of TiO₂nanoparticles toward bacteria through viability, cellular respiration, and lipid peroxidation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:17917-17924. [PMID: 26165996 DOI: 10.1007/s11356-015-5018-1] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Accepted: 07/01/2015] [Indexed: 06/04/2023]
Abstract
To better understand the potential impacts of metal oxide nanoparticles (NPs) on Gram(+) Bacillus subtilis and Gram(-) Escherichia coli (K12) bacteria, eight different nanosized titanium dioxide (TiO2) suspensions with five different concentrations were used. Water quality parameters (pH, temperature, and ionic strength), light sources, and light intensities were also changed to achieve different environmental conditions. The photosensitive TiO2 NPs were found to be harmful to varying degrees under ambient conditions, with antibacterial activity increasing with primary particle sizes from 16 to 20 nm. The presence of light was a significant factor under most conditions tested, presumably due to its role in promoting generation of reactive oxygen species (ROS). However, bacterial growth inhibition was also observed under dark conditions and different water quality parameters, indicating that undetermined mechanisms additional to photocatalytic ROS production were responsible for toxicity. The results also indicated that nano-TiO2 particles in the absence and the presence of photoactivation induced lipid peroxidation and cellular respiration disruption.
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Affiliation(s)
- Ayca Erdem
- Department of Environmental Engineering, Akdeniz University, Antalya, 07058, Turkey.
- Department of Civil and Environmental Engineering, University of Delaware, Newark, DE, 19716, USA.
| | - David Metzler
- Department of Civil and Environmental Engineering, University of Delaware, Newark, DE, 19716, USA
| | - Daniel K Cha
- Department of Civil and Environmental Engineering, University of Delaware, Newark, DE, 19716, USA
| | - C P Huang
- Department of Civil and Environmental Engineering, University of Delaware, Newark, DE, 19716, USA
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109
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Adam V, Loyaux-Lawniczak S, Quaranta G. Characterization of engineered TiO₂ nanomaterials in a life cycle and risk assessments perspective. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:11175-92. [PMID: 25994264 DOI: 10.1007/s11356-015-4661-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Accepted: 05/04/2015] [Indexed: 04/16/2023]
Abstract
For the last 10 years, engineered nanomaterials (ENMs) have raised interest to industrials due to their properties. They are present in a large variety of products from cosmetics to building materials through food additives, and their value on the market was estimated to reach $3 trillion in 2014 (Technology Strategy Board 2009). TiO2 NMs represent the second most important part of ENMs production worldwide (550-5500 t/year). However, a gap of knowledge remains regarding the fate and the effects of these, and consequently, impact and risk assessments are challenging. This is due to difficulties in not only characterizing NMs but also in selecting the NM properties which could contribute most to ecotoxicity and human toxicity. Characterizing NMs should thus rely on various analytical techniques in order to evaluate several properties and to crosscheck the results. The aims of this review are to understand the fate and effects of TiO2 NMs in water, sediment, and soil and to determine which of their properties need to be characterized, to assess the analytical techniques available for their characterization, and to discuss the integration of specific properties in the Life Cycle Assessment and Risk Assessment calculations. This study underlines the need to take into account nano-specific properties in the modeling of their fate and effects. Among them, crystallinity, size, aggregation state, surface area, and particle number are most significant. This highlights the need for adapting ecotoxicological studies to NP-specific properties via new methods of measurement and new metrics for ecotoxicity thresholds.
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Affiliation(s)
- Véronique Adam
- Laboratoire d'Hydrologie et de Géochimie de Strasbourg/EOST/UDS, 1, rue Blessig, 67084, Strasbourg Cedex, France,
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110
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Tomaszewski KA, Radomski MW, Santos-Martinez MJ. Nanodiagnostics, nanopharmacology and nanotoxicology of platelet–vessel wall interactions. Nanomedicine (Lond) 2015; 10:1451-75. [DOI: 10.2217/nnm.14.232] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
In physiological conditions, the interactions between blood platelets and endothelial cells play a major role in vascular reactivity and hemostasis. By contrast, increased platelet activation contributes to the pathogenesis of vascular pathology such as atherosclerosis, thrombosis, diabetes mellitus, hypertension and carcinogenesis. Nanomedicine, including nanodiagnostics and nanotherapeutics is poised to be used in the management of vascular diseases. However, the inherent risk and potential toxicity resultant from the use of nanosized (<100 nm) materials need to be carefully considered. This review, basing on a systematic search of literature provides state-of-the-art and focuses on new discoveries, as well as the potential benefits and threats in the field of nanodiagnostics, nanopharmacology and nanotoxicology of platelet–vessel wall interactions.
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Affiliation(s)
- Krzysztof A Tomaszewski
- School of Pharmacy & Pharmaceutical Sciences & Trinity Biomedical Sciences Institute, The University of Dublin Trinity College, Dublin, Ireland
- Department of Anatomy, Jagiellonian University Medical College, 12 Kopernika St, 31–034 Krakow, Poland
| | - Marek W Radomski
- School of Pharmacy & Pharmaceutical Sciences & Trinity Biomedical Sciences Institute, The University of Dublin Trinity College, Dublin, Ireland
- Kardio-Med Silesia, Zabrze, Poland
- Medical University of Silesia, Katowice, Poland
| | - Maria Jose Santos-Martinez
- School of Pharmacy & Pharmaceutical Sciences & Trinity Biomedical Sciences Institute, The University of Dublin Trinity College, Dublin, Ireland
- School of Medicine, The University of Dublin Trinity College, Dublin, Ireland
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