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Sun X, Qin X, Liang G, Chang X, Zhu H, Zhang J, Zhang D, Sun Y, Feng S. Manganese dioxide nanoparticles provoke inflammatory damage in BV2 microglial cells via increasing reactive oxygen species to activate the p38 MAPK pathway. Toxicol Ind Health 2024; 40:244-253. [PMID: 38518383 DOI: 10.1177/07482337241242508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/24/2024]
Abstract
With the widespread use of manganese dioxide nanoparticles (nano MnO2), health hazards have also emerged. The inflammatory damage of brain tissues could result from nano MnO2, in which the underlying mechanism is still unclear. During this study, we aimed to investigate the role of ROS-mediated p38 MAPK pathway in nano MnO2-induced inflammatory response in BV2 microglial cells. The inflammatory injury model was established by treating BV2 cells with 2.5, 5.0, and 10.0 μg/mL nano MnO2 suspensions for 12 h. Then, the reactive oxygen species (ROS) scavenger (20 nM N-acetylcysteine, NAC) and the p38 MAPK pathway inhibitor (10 μM SB203580) were used to clarify the role of ROS and the p38 MAPK pathway in nano MnO2-induced inflammatory lesions in BV2 cells. The results indicated that nano MnO2 enhanced the expression of pro-inflammatory cytokines IL-1β and TNF-α, elevated intracellular ROS levels and activated the p38 MAPK pathway in BV2 cells. Controlling intracellular ROS levels with NAC inhibited p38 MAPK pathway activation and attenuated the inflammatory response induced by nano MnO2. Furthermore, inhibition of the p38 MAPK pathway with SB203580 led to a decrease in the production of inflammatory factors (IL-1β and TNF-α) in BV2 cells. In summary, nano MnO2 can induce inflammatory damage by increasing intracellular ROS levels and further activating the p38 MAPK pathway in BV2 microglial cells.
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Affiliation(s)
- Xingchang Sun
- Institute of Occupational Diseases, Lanzhou Petrochemical General Hospital, Lanzhou, China
| | - Xin Qin
- Department of Toxicology, School of Public Health, Lanzhou University, Lanzhou, China
| | - Gaofeng Liang
- Institute of Occupational Diseases, Lanzhou Petrochemical General Hospital, Lanzhou, China
| | - Xuhong Chang
- Department of Toxicology, School of Public Health, Lanzhou University, Lanzhou, China
| | - Huike Zhu
- Department of Toxicology, School of Public Health, Lanzhou University, Lanzhou, China
| | - Jiahao Zhang
- Department of Toxicology, School of Public Health, Lanzhou University, Lanzhou, China
| | - Dan Zhang
- Department of Toxicology, School of Public Health, Lanzhou University, Lanzhou, China
| | - Yingbiao Sun
- Department of Toxicology, School of Public Health, Lanzhou University, Lanzhou, China
| | - Sanwei Feng
- Institute of Occupational Diseases, Lanzhou Petrochemical General Hospital, Lanzhou, China
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2
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Zhai J, Xia Z, Zhou B, Wu H, Xue T, Chen X, Jiao J, Jia S, He M, Han B. Photo-thermal coupling to enhance CO 2 hydrogenation toward CH 4 over Ru/MnO/Mn 3O 4. Nat Commun 2024; 15:1109. [PMID: 38321049 PMCID: PMC10847166 DOI: 10.1038/s41467-024-45389-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Accepted: 01/19/2024] [Indexed: 02/08/2024] Open
Abstract
Upcycling of CO2 into fuels by virtually unlimited solar energy provides an ultimate solution for addressing the substantial challenges of energy crisis and climate change. In this work, we report an efficient nanostructured Ru/MnOx catalyst composed of well-defined Ru/MnO/Mn3O4 for photo-thermal catalytic CO2 hydrogenation to CH4, which is the result of a combination of external heating and irradiation. Remarkably, under relatively mild conditions of 200 °C, a considerable CH4 production rate of 166.7 mmol g-1 h-1 was achieved with a superior selectivity of 99.5% at CO2 conversion of 66.8%. The correlative spectroscopic and theoretical investigations suggest that the yield of CH4 is enhanced by coordinating photon energy with thermal energy to reduce the activation energy of reaction and promote formation of key intermediate COOH* species over the catalyst. This work opens up a new strategy for CO2 hydrogenation toward CH4.
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Affiliation(s)
- Jianxin Zhai
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, State Key Laboratory of Petroleum Molecular & Process Engineering, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China
- Institute of Eco-Chongming, Shanghai, 202162, China
| | - Zhanghui Xia
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, State Key Laboratory of Petroleum Molecular & Process Engineering, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China
- Institute of Eco-Chongming, Shanghai, 202162, China
| | - Baowen Zhou
- Key Laboratory for Power Machinery and Engineering of Ministry of Education, Research Center for Renewable Synthetic Fuel, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
| | - Haihong Wu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, State Key Laboratory of Petroleum Molecular & Process Engineering, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China.
- Institute of Eco-Chongming, Shanghai, 202162, China.
| | - Teng Xue
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, State Key Laboratory of Petroleum Molecular & Process Engineering, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China
- Institute of Eco-Chongming, Shanghai, 202162, China
| | - Xiao Chen
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, State Key Laboratory of Petroleum Molecular & Process Engineering, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China
- Institute of Eco-Chongming, Shanghai, 202162, China
| | - Jiapeng Jiao
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, State Key Laboratory of Petroleum Molecular & Process Engineering, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China
- Institute of Eco-Chongming, Shanghai, 202162, China
| | - Shuaiqiang Jia
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, State Key Laboratory of Petroleum Molecular & Process Engineering, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China
- Institute of Eco-Chongming, Shanghai, 202162, China
| | - Mingyuan He
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, State Key Laboratory of Petroleum Molecular & Process Engineering, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China.
- Institute of Eco-Chongming, Shanghai, 202162, China.
| | - Buxing Han
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, State Key Laboratory of Petroleum Molecular & Process Engineering, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China.
- Institute of Eco-Chongming, Shanghai, 202162, China.
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Colloid and Interface and Thermodynamics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
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3
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Johnston LJ, Du X, Zborowski A, Kennedy DC. Characterization and Cellular Toxicity Studies of Commercial Manganese Oxide Nanoparticles. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:198. [PMID: 38251162 PMCID: PMC10821457 DOI: 10.3390/nano14020198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 12/11/2023] [Accepted: 01/11/2024] [Indexed: 01/23/2024]
Abstract
Manganese oxide nanoparticles (MnOx NPs) are finding applications in several environmentally important areas such as farming and energy storage. MnOx NPs span a range of metal oxidation states that open up a wide range of applications in catalysis as well. As a result, it is important to understand how such materials can impact human health through incidental exposure. In this study, we examined a range of commercially available Mn2O3 NPs and compared our characterization data to those supplied by manufacturers. Discrepancies were noted and then measured values were used to assess the biological impact of these materials on three mammalian cell lines-A549, HepG2 and J774A.1 cells. Cell toxicity assays showed that all Mn2O3 particles exhibited cytotoxic effects that may be correlated, at least in part, to the production of reactive oxygen species. All eight nanoforms also activated caspase 3 but not caspase 1, although the magnitude of these changes varied greatly between materials.
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Affiliation(s)
- Linda J. Johnston
- Metrology, National Research Council Canada, 1200 Montreal Road, Ottawa, ON K1A 0R6, Canada;
| | - Xiaomei Du
- Energy, Mining and Environment, National Research Council Canada, 1200 Montreal Road, Ottawa, ON K1A 0R6, Canada; (X.D.); (A.Z.)
| | - Andre Zborowski
- Energy, Mining and Environment, National Research Council Canada, 1200 Montreal Road, Ottawa, ON K1A 0R6, Canada; (X.D.); (A.Z.)
| | - David C. Kennedy
- Metrology, National Research Council Canada, 1200 Montreal Road, Ottawa, ON K1A 0R6, Canada;
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Swathi R, Reddy GB, Rajkumar B, Ramakrishna D, Swamy PY. Jamun Seed-Derived Nitrogen-Doped Carbon Dots: A Novel Microwave-Assisted Synthesis for Ultra-Bright Fluorescence and Mn 7+ Detection. J Fluoresc 2023:10.1007/s10895-023-03438-2. [PMID: 37747598 DOI: 10.1007/s10895-023-03438-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Accepted: 09/08/2023] [Indexed: 09/26/2023]
Abstract
For the synthesis of heteroatom-doped carbon nanostructures, biomass is considered as a promising option. Utilizing the microwave-assisted method, we have demonstrated an easy and straightforward one-pot synthesis of nitrogen-doped luminous carbon dots (NCDs) from jamun seed powder and guanidine hydrochloride. Structural and morphological analyses were performed using various analytical techniques. Under ultraviolet light of 315 nm, NCDs emit a bright blue fluorescence, possess a high quantum yield of 26.90%, exhibit strong water dispersion, and demonstrated excellent stability. The average particle size of the NCDs was found to be 7.5±1.2 nm, with a spherical shape. NCDs exhibit high selectivity and sensitivity in fluorescence quenching when exposed to Mn7+ ions. Over a concentration range of 2-30 µM, the fluorescence response (F0/F) shows a linear relationship with Mn7+ concentration, with a detection limit of 0.81 µM. The probe exhibited negligible interference and proved to be effective in accurately quantifying Mn7+ in spiked real-water samples.
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Affiliation(s)
- R Swathi
- Department of Chemistry, Osmania University, Hyderabad, Telangana, 500008, India
| | - G Bhagavanth Reddy
- Department of Chemistry, Palamuru University, Wanaparthy, Telangana, 509001, India
| | - Bandi Rajkumar
- Department of Chemistry, Osmania University, Hyderabad, Telangana, 500008, India
| | - Dadigala Ramakrishna
- Department of Chemistry, Osmania University, Hyderabad, Telangana, 500008, India
| | - P Yadagiri Swamy
- Department of Chemistry, Osmania University, Hyderabad, Telangana, 500008, India.
- Department of Chemistry, Palamuru University, Wanaparthy, Telangana, 509001, India.
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5
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Vanadium doped OMS-2 catalysts for one-pot synthesis of imine from benzyl alcohol and aniline: Effects of vanadium content and precursor. CATAL COMMUN 2022. [DOI: 10.1016/j.catcom.2022.106540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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6
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Physicochemical Properties of Indoor and Outdoor Particulate Matter 2.5 in Selected Residential Areas near a Ferromanganese Smelter. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18178900. [PMID: 34501491 PMCID: PMC8431365 DOI: 10.3390/ijerph18178900] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 07/30/2021] [Accepted: 08/15/2021] [Indexed: 12/13/2022]
Abstract
Particulate matter (PM) of different sizes and elemental composition is a leading contributor to indoor and outdoor air pollution in residential areas. We sought to investigate similarities between indoor and outdoor PM2.5 in three residential areas near a ferromanganese smelter in Meyerton to apportion the emission source(s). Indoor and outdoor PM2.5 samples were collected concurrently, using GilAir300 plus samplers, at a flow rate of 2.75 L/min. PM2.5 was collected on polycarbonate membrane filters housed in 37 mm cassettes coupled with PM2.5 cyclones. Scanning electron microscopy coupled with energy-dispersive spectroscopy was used to study the morphology, and inductively coupled plasma-mass spectroscopy was used to analyse the elemental composition of the PM2.5. Mean indoor and outdoor PM2.5 mass concentrations were 10.99 and 24.95 µg/m3, respectively. Mean outdoor mass concentration was 2.27-fold higher than the indoor concentration. Indoor samples consisted of irregular and agglomerated particles, ranging from 0.09 to 1.06 µm, whereas outdoor samples consisted of irregular and spherical particles, ranging from 0.10 to 0.70 µm. Indoor and outdoor PM2.5 were dominated by manganese, silicon, and iron, however, outdoor PM2.5 had the highest concentration of all elements. The ferromanganese smelter was identified as the potential main contributing source of PM2.5 of different physicochemical properties.
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7
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Sit I, Wu H, Grassian VH. Environmental Aspects of Oxide Nanoparticles: Probing Oxide Nanoparticle Surface Processes Under Different Environmental Conditions. ANNUAL REVIEW OF ANALYTICAL CHEMISTRY (PALO ALTO, CALIF.) 2021; 14:489-514. [PMID: 33940931 DOI: 10.1146/annurev-anchem-091420-092928] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Surface chemistry affects the physiochemical properties of nanoparticles in a variety of ways. Therefore, there is great interest in understanding how nanoparticle surfaces evolve under different environmental conditions of pH and temperature. Here, we discuss the use of vibrational spectroscopy as a tool that allows for in situ observations of oxide nanoparticle surfaces and their evolution due to different surface processes. We highlight oxide nanoparticle surface chemistry, either engineered anthropogenic or naturally occurring geochemical nanoparticles, in complex media, with a focus on the impact of (a) pH on adsorption, intermolecular interactions, and conformational changes; (b) surface coatings and coadsorbates on protein adsorption kinetics and protein conformation; (c) surface adsorption on the temperature dependence of protein structure phase changes; and (d) the use of two-dimensional correlation spectroscopy to analyze spectroscopic results for complex systems. An outlook of the field and remaining challenges is also presented.
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Affiliation(s)
- Izaac Sit
- Department of Nanoengineering, University of California, San Diego, La Jolla, California 92093, USA; ,
| | - Haibin Wu
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, USA;
| | - Vicki H Grassian
- Department of Nanoengineering, University of California, San Diego, La Jolla, California 92093, USA; ,
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, USA;
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093, USA
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8
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A New Supported Manganese-Based Coordination Complex as a Nano-Catalyst for the Synthesis of Indazolophthalazinetriones and Investigation of Its Antibacterial Activity. CHEMISTRY 2021. [DOI: 10.3390/chemistry3030056] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
A new magnetic supported manganese-based coordination complex (Fe3O4@SiO2@CPTMS@MBOL@ Mn) was prepared in consecutive stages and characterized via various techniques (VSM, SEM, TEM, XRD, FT-IR, EDX, TG-DTA, and ICP). To evaluate its application, it was used for synthesis of divers Indazolophthalazinetriones in a simple procedure via the one-pot three-component condensation reaction of aldehydes, dimedone, and phthalhydrazide in ethanol under reflux conditions. The Mn catalyst can be recycled without any noticeable loss in catalytic activity. Additionally, the antibacterial properties of the nano-catalyst were studied against some bacterial strains.
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9
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Innes E, Yiu HHP, McLean P, Brown W, Boyles M. Simulated biological fluids - a systematic review of their biological relevance and use in relation to inhalation toxicology of particles and fibres. Crit Rev Toxicol 2021; 51:217-248. [PMID: 33905298 DOI: 10.1080/10408444.2021.1903386] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The use of simulated biological fluids (SBFs) is a promising in vitro technique to better understand the release mechanisms and possible in vivo behaviour of materials, including fibres, metal-containing particles and nanomaterials. Applications of SBFs in dissolution tests allow a measure of material biopersistence or, conversely, bioaccessibility that in turn can provide a useful inference of a materials biodistribution, its acute and long-term toxicity, as well as its pathogenicity. Given the wide range of SBFs reported in the literature, a review was conducted, with a focus on fluids used to replicate environments that may be encountered upon material inhalation, including extracellular and intracellular compartments. The review aims to identify when a fluid design can replicate realistic biological conditions, demonstrate operation validation, and/or provide robustness and reproducibility. The studies examined highlight simulated lung fluids (SLFs) that have been shown to suitably replicate physiological conditions, and identify specific components that play a pivotal role in dissolution mechanisms and biological activity; including organic molecules, redox-active species and chelating agents. Material dissolution was not always driven by pH, and likewise not only driven by SLF composition; specific materials and formulations correspond to specific dissolution mechanisms. It is recommended that SLF developments focus on biological predictivity and if not practical, on better biological mimicry, as such an approach ensures results are more likely to reflect in vivo behaviour regardless of the material under investigation.
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Affiliation(s)
- Emma Innes
- Institute of Occupational Medicine (IOM), Edinburgh, UK
| | - Humphrey H P Yiu
- Chemical Engineering, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, UK
| | - Polly McLean
- Institute of Occupational Medicine (IOM), Edinburgh, UK
| | - William Brown
- Institute of Occupational Medicine (IOM), Edinburgh, UK
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10
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Browning CL, Green A, Gray EP, Hurt R, Kane AB. Manganese dioxide nanosheets induce mitochondrial toxicity in fish gill epithelial cells. Nanotoxicology 2021; 15:400-417. [PMID: 33502918 PMCID: PMC8026737 DOI: 10.1080/17435390.2021.1874562] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 11/17/2020] [Accepted: 01/07/2021] [Indexed: 10/22/2022]
Abstract
The development and production of engineered 2D nanomaterials are expanding exponentially, increasing the risk of their release into the aquatic environment. A recent study showed 2D MnO2 nanosheets, under development for energy and biomedical applications, dissolve upon interaction with biological reducing agents, resulting in depletion of intracellular glutathione levels within fish gill cells. However, little is known concerning their toxicity and interactions with subcellular organelles. To address this gap, we examined cellular uptake, cytotoxicity and mitochondrial effects of 2D MnO2 nanosheets using an in vitro fish gill cell line to represent a target tissue of rainbow trout, a freshwater indicator species. The data demonstrate cellular uptake of MnO2 nanosheets into lysosomes and potential mechanisms of dissolution within the lysosomal compartment. MnO2 nanosheets induced severe mitochondrial dysfunction at sub-cytotoxic doses. Quantitative, single cell fluorescent imaging revealed mitochondrial fission and impaired mitochondrial membrane potential following MnO2 nanosheet exposure. Seahorse analyses for cellular respiration revealed that MnO2 nanosheets inhibited basal respiration, maximal respiration and the spare respiratory capacity of gill cells, indicating mitochondrial dysfunction and reduced cellular respiratory activity. MnO2 nanosheet exposure also inhibited ATP production, further supporting the suppression of mitochondrial function and cellular respiration. Together, these observations indicate that 2D MnO2 nanosheets impair the ability of gill cells to respond to energy demands or prolonged stress. Finally, our data demonstrate significant differences in the toxicity of the 2D MnO2 nanosheets and their microparticle counterparts. This exemplifies the importance of considering the unique physical characteristics of 2D nanomaterials when conducting safety assessments.
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Affiliation(s)
- Cynthia L. Browning
- Department of Pathology and Laboratory Medicine, Brown University, Providence, RI, USA
| | - Allen Green
- The School of Engineering, Brown University, Providence, RI, USA
| | - Evan P. Gray
- Civil Environmental and Construction Engineering Department, Texas Tech University, Lubbock, TX, USA
| | - Robert Hurt
- The School of Engineering, Brown University, Providence, RI, USA
| | - Agnes B. Kane
- Department of Pathology and Laboratory Medicine, Brown University, Providence, RI, USA
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11
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Illarionova NB, Morozova KN, Petrovskii DV, Sharapova MB, Romashchenko AV, Troitskii SY, Kiseleva E, Moshkin YM, Moshkin MP. 'Trojan-Horse' stress-granule formation mediated by manganese oxide nanoparticles. Nanotoxicology 2020; 14:1432-1444. [PMID: 33320703 DOI: 10.1080/17435390.2020.1856433] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Exposure to nanomaterials is considered as one of the risk factors for neurodegenerative pathology. In vitro inorganic nanoparticles (NPs) absorb intrinsically disordered proteins, many of which are the constituents of stress-granules (SGs). SGs normally form in response to cellular stress and, here, we addressed whether selected inorganic NPs could trigger SGs formation in cells. To this end, we have tested a series of inorganic NPs for their ability to induce SGs formation in human glioblastoma and fibroblast cell lines. Among tested NPs, only Mn3O4 NPs triggered SGs formation in cell-type-specific and metabolic-dependent manner. In human glioblastoma U87 MG cell line, Mn3O4 NPs entered cells within minutes and resided inside intracellular vesicles for at least 48 h. Mn3O4 NPs induced a strong reduction in oxidative phosphorylation rate, but not glycolysis. We showed that Mn3O4 NPs slowly dissolve producing a local net of Mn2+ cations, which are known to inhibit oxidative phosphorylation. Indeed, direct incubation of cells with equimolar amounts of Mn2+ cations triggered SGs formation and reduced cellular respiration rate. However, while SGs formed in response to Mn3O4 NPs persisted for hours, SGs formation by Mn2+ peaked and dropped within minutes. Finally, Mn3O4 NPs mediated SGs formation via the phosphorylation of eIF2α. Thus, we conclude that exposure of U87 MG cells to Mn3O4 NPs caused a 'Trojan-horse' prolonged SGs response.
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Affiliation(s)
| | - Ksenia N Morozova
- Institute of Cytology and Genetics SB RAS, Novosibirsk, Russia.,Department of Natural Sciences, Novosibirsk State University, Novosibirsk, Russia
| | - Dmitry V Petrovskii
- Institute of Cytology and Genetics SB RAS, Novosibirsk, Russia.,Department of Natural Sciences, Novosibirsk State University, Novosibirsk, Russia
| | | | | | - Sergey Y Troitskii
- Department of Heterogeneous Catalysis, Boreskov Institute of Catalysis, Siberian Branch of RAS, Novosibirsk, Russia
| | - Elena Kiseleva
- Institute of Cytology and Genetics SB RAS, Novosibirsk, Russia
| | - Yuri M Moshkin
- Institute of Cytology and Genetics SB RAS, Novosibirsk, Russia
| | - Mikhail P Moshkin
- Institute of Cytology and Genetics SB RAS, Novosibirsk, Russia.,National Research Tomsk State University, Tomsk, Russia
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12
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Highly selective oxidation of amines to imines by Mn2O3 catalyst under eco-friendly conditions. CHINESE CHEM LETT 2019. [DOI: 10.1016/j.cclet.2019.09.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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13
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Honarasa F, Peyravi F, Amirian H. C-dots/Mn3O4 nanocomposite as an oxidase nanozyme for colorimetric determination of ferrous ion. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2019. [DOI: 10.1007/s13738-019-01787-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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14
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Chen F, Zhao S, Yang T, Jiang T, Ni J, Xiong H, Zhang Q, Li X. Controllable synthesis of novel nanoporous manganese oxide catalysts for the direct synthesis of imines from alcohols and amines. Chin J Chem Eng 2019. [DOI: 10.1016/j.cjche.2019.01.038] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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15
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Gonzalez-Pech NI, Stebounova LV, Ustunol IB, Park JH, Anthony TR, Peters TM, Grassian VH. Size, composition, morphology, and health implications of airborne incidental metal-containing nanoparticles. JOURNAL OF OCCUPATIONAL AND ENVIRONMENTAL HYGIENE 2019; 16:387-399. [PMID: 30570411 PMCID: PMC7086472 DOI: 10.1080/15459624.2018.1559925] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
There is great concern regarding the adverse health implications of engineered nanoparticles. However, there are many circumstances where the production of incidental nanoparticles, i.e., nanoparticles unintentionally generated as a side product of some anthropogenic process, is of even greater concern. In this study, metal-based incidental nanoparticles were measured in two occupational settings: a machining center and a foundry. On-site characterization of substrate-deposited incidental nanoparticles using a field-portable X-ray fluorescence provided some insights into the chemical characteristics of these metal-containing particles. The same substrates were then used to carry out further off-site analysis including single-particle analysis using scanning electron microscopy and energy-dispersive X-ray spectroscopy. Between the two sites, there were similarities in the size and composition of the incidental nanoparticles as well as in the agglomeration and coagulation behavior of nanoparticles. In particular, incidental nanoparticles were identified in two forms: submicrometer fractal-like agglomerates from activities such as welding and supermicrometer particles with incidental nanoparticles coagulated to their surface, herein referenced as nanoparticle collectors. These agglomerates will affect deposition and transport inside the respiratory system of the respirable incidental nanoparticles and the corresponding health implications. The studies of incidental nanoparticles generated in occupational settings lay the groundwork on which occupational health and safety protocols should be built.
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Affiliation(s)
| | - Larissa V. Stebounova
- Department of Occupational and Environmental Health, The University of Iowa, Iowa City, IA
| | - Irem B. Ustunol
- Department of Nanoengineering, University of California San Diego, La Jolla, CA
| | - Jae Hong Park
- School of Health Sciences, Purdue University, West Lafayette, IN
| | - T. Renee Anthony
- Department of Occupational and Environmental Health, The University of Iowa, Iowa City, IA
| | - Thomas M. Peters
- Department of Occupational and Environmental Health, The University of Iowa, Iowa City, IA
| | - Vicki H. Grassian
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, CA
- Department of Nanoengineering, University of California San Diego, La Jolla, CA
- Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA
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16
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Manganese oxide nanoparticles induce genotoxicity and DNA hypomethylation in the moss Physcomitrella patens. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2019; 842:146-157. [DOI: 10.1016/j.mrgentox.2018.12.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Revised: 12/12/2018] [Accepted: 12/14/2018] [Indexed: 02/06/2023]
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