1
|
Pei Z, Ma J, Li L, Xie J, Wang L, Wen B, Zhang S, Xing B. Synergetic mediation of reduced graphene oxide and Cu(II) on the oxidation of 2-naphthol in water. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 252:689-696. [PMID: 31185358 DOI: 10.1016/j.envpol.2019.05.126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Revised: 04/27/2019] [Accepted: 05/24/2019] [Indexed: 06/09/2023]
Abstract
Reduced graphene oxide (rGO) is one of the most widely used carbon nanomaterials. When it is released into the environment, rGO can markedly affect the transformation of many pollutants, and change their fate and risk. In this work, the synergetic effects of rGO and Cu(II) on the oxidation of 2-naphthol were examined in water in the dark. It was found that the coexistence of rGO and Cu(II) significantly promoted the oxidation of 2-naphthol. Corresponding products were identified as the coupling oligomers of 2-naphthol (dimer, trimer and tetramer) and hydroxylated compounds (OH-2-naphthol, OH-dimer, di-OH-dimer and naphthoquinone derivatives). In the oxidation reaction, rGO played dual roles, i.e. adsorbent and electron-transfer mediator. rGO firstly adsorbed Cu(II) and 2-naphthol on its surface, and then transferred electrons from 2-naphthol to Cu(II) to yield 2-naphthol radicals and Cu(I). 2-Naphthol radicals coupled to each other to form different oligomers of 2-naphthol. Cu(I) was re-oxidized back to Cu(II) by dissolved oxygen, which sustained the continuous oxidation of 2-naphthol. During the autoxidation of Cu(I), reactive oxygen species were generated, which further reacted with 2-naphthol to form hydroxylated products. These findings provide new insights into the risk assessment of rGO and 2-naphthol in aquatic environments.
Collapse
Affiliation(s)
- Zhiguo Pei
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, PO Box 2871, Beijing, 100085, China; Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA, 01003, USA.
| | - Jie Ma
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, PO Box 2871, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - Lingyun Li
- Key Laboratory of Vegetables Quality and Safety Control, Ministry of Agriculture and Rural Affairs of China, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.
| | - Jieli Xie
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, PO Box 2871, Beijing, 100085, China.
| | - Lingqing Wang
- Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China.
| | - Bei Wen
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, PO Box 2871, Beijing, 100085, China.
| | - Shuzhen Zhang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, PO Box 2871, Beijing, 100085, China.
| | - Baoshan Xing
- Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA, 01003, USA.
| |
Collapse
|
2
|
|
3
|
Comparative Degradation of Atrazine by Anodic Oxidation at Graphite and Platinum Electrodes and Insights into Electrochemical Behavior of Graphite Anode. Electrocatalysis (N Y) 2018. [DOI: 10.1007/s12678-018-0493-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
4
|
Young BR, Aminayi P. Single-walled carbon nanotube (SWNT)-carboxymethylcellulose (CMC) dispersions in aqueous solution and electronic transport properties when dried as thin film conductors. J DISPER SCI TECHNOL 2018. [DOI: 10.1080/01932691.2018.1452759] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- B. R. Young
- Chemical and Paper Engineering, College of Engineering and Applied Sciences, Western Michigan University, Kalamazoo, Michigan, USA
| | - P. Aminayi
- Chemical and Paper Engineering, College of Engineering and Applied Sciences, Western Michigan University, Kalamazoo, Michigan, USA
| |
Collapse
|
5
|
Lu K, Hu J, Gao S, Mao L. Multi-walled carbon nanotubes facilitated the removal of tetrabromobisphenol a mediated by horseradish peroxidase. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2017; 231:863-870. [PMID: 28881310 DOI: 10.1016/j.envpol.2017.08.093] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Revised: 08/15/2017] [Accepted: 08/28/2017] [Indexed: 06/07/2023]
Abstract
In this study, we systematically investigated the effect of multiwall carbon nanotubes (MWCNTs) on the removal of tetrabromobisphenol A (TBBPA) mediated by horseradish peroxidase (HRP) at varying important conditions. The results suggested that the presence of MWCNTs significantly enhanced the removal of TBBPA mediated by HRP and the reaction rate constant was linear with the MWCNTs dosage. The enhancement of MWCNTs on the HRP-mediated reaction was attributed to two facts, one is that MWCNTs protected HRP from inactivation, the other is that the presence of MWCNTs made the homogeneous reaction of TBBPA be heterogeneous reaction by adsorbing TBBPA on its surface. Moreover, the influence of MWCNTs on TBBPA products distribution was further elucidated. We found that the species of reaction product had no difference between the HRP-mediated systems with and without the presence of MWCNTs. However, the presence of MWCNTs significantly decreased the yields of each product. These results give insight into the role of MWCNTs in HRP-mediated TBBPA reactions and provide theoretical foundation for potential development of novel enzymatic methods to control TBBPA contamination. MWCNTs enhanced the removal of TBBPA mediated by HRP/H2O2, because it protected HRP from inactivation and adsorbed TBBPA on its surface to form a heterogeneous reaction process.
Collapse
Affiliation(s)
- Kun Lu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, China
| | - Jinyuan Hu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, China
| | - Shixiang Gao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, China
| | - Liang Mao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, China.
| |
Collapse
|
6
|
Monserrat JM, Seixas ALR, Ferreira-Cravo M, Bürguer-Mendonça M, Garcia SC, Kaufmann CG, Ventura-Lima J. Interference of single walled carbon nanotubes (SWCNT) in the measurement of lipid peroxidation in aquatic organisms through TBARS assay. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2017; 140:103-108. [PMID: 28254719 DOI: 10.1016/j.ecoenv.2017.02.034] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Revised: 02/22/2017] [Accepted: 02/23/2017] [Indexed: 06/06/2023]
Abstract
Nanomaterials (NM) exhibit unique properties due their size and relative area, but the mechanisms and effects in the living organisms are yet to be unfold in their totality. Potential toxicity mechanisms concerning NM as carbon nanotubes include oxidative stress generation. Several fluorimetric and colorimetric methods have been systematically used to measure NM toxicity, and controversial results have been reported. One of the problems can be related to the interference effects induced by NM, leading to artifacts that can lead to misleading conclusions. In present study, it was performed in vitro assays with two aquatic species: the zebrafish Danio rerio and the polychaete Laeonereis acuta to evaluate the potential interference capacity of single-wall carbon nanotubes (SWCNT) in a fluorometric method (TBARS assay) to measure lipid peroxidation. Obtained results indicated that gills and brain of zebrafish presented a lowered fluorescence only at extremely high concentrations (50 and 500mg/L). Determinations in anterior, middle, and posterior body regions of L. acuta showed a quite different pattern: high fluorescence at low SWCNT concentrations (0.5mg/L) and lowering at the highest (500mg/L). To eliminate matrix effect of biological samples, tests employing the standard for TBARS assay, 1,3,3-tetramethoxipropane, were run and the results showed again higher fluorescence values at low concentrations (0.5-5mg SWCNT/L), a technique artifact that could lead to misleading conclusions since higher fluorescence values implicate higher TBARS concentration, implying oxidative stress. Using the colorimetric FOX assay with cumene hydroperoxide as standard presented remarkable better results since no artifacts were observed in the same SWCNT concentration range that employed with the TBARS technique.
Collapse
Affiliation(s)
- J M Monserrat
- Instituto de Ciências Biológicas (ICB), Universidade Federal do Rio Grande - FURG, Rio Grande, RS, Brazil; Programa de Pós-Graduação em Ciências Fisiológicas - Fisiologia Animal Comparada - ICB-FURG, Brazil; Instituto Nacional de Ciência e Tecnologia em Nanomateriais de Carbono (CNPq), Brazil; Rede de Nanotoxicologia (MCTI/CNPq), Brazil.
| | - A L R Seixas
- Programa de Pós-Graduação em Ciências Fisiológicas - Fisiologia Animal Comparada - ICB-FURG, Brazil; Rede de Nanotoxicologia (MCTI/CNPq), Brazil
| | - M Ferreira-Cravo
- Programa de Pós-Graduação em Ciências Fisiológicas - Fisiologia Animal Comparada - ICB-FURG, Brazil; Rede de Nanotoxicologia (MCTI/CNPq), Brazil
| | - M Bürguer-Mendonça
- Programa de Pós-Graduação em Ciências Fisiológicas - Fisiologia Animal Comparada - ICB-FURG, Brazil; Rede de Nanotoxicologia (MCTI/CNPq), Brazil
| | - S C Garcia
- Universidade Federal do Rio Grande do Sul (UFRGS), Lab. de Toxicologia, Porto Alegre, RS, Brazil; Programa de Pós-graduação em Ciências Farmacéuticas, UFRGS, Brazil
| | - C G Kaufmann
- Departamento de Materiais, Lab. de Materiais Cerámicos, UFRGS, Brazil
| | - J Ventura-Lima
- Instituto de Ciências Biológicas (ICB), Universidade Federal do Rio Grande - FURG, Rio Grande, RS, Brazil; Programa de Pós-Graduação em Ciências Fisiológicas - Fisiologia Animal Comparada - ICB-FURG, Brazil; Instituto Nacional de Ciência e Tecnologia em Nanomateriais de Carbono (CNPq), Brazil; Rede de Nanotoxicologia (MCTI/CNPq), Brazil
| |
Collapse
|
7
|
Hirano A, Kameda T, Sakuraba S, Wada M, Tanaka T, Kataura H. Disulfide bond formation of thiols by using carbon nanotubes. NANOSCALE 2017; 9:5389-5393. [PMID: 28422249 DOI: 10.1039/c7nr01001j] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Clarification of the interactions between carbon nanotubes (CNTs) and proteinogenic amino acids is a key approach to understanding CNT-protein interactions. Previous studies have addressed the mechanism of the physical adsorption of amino acids onto CNTs. However, little is known about their chemical reactions in aqueous solutions. Here, we established dispersant-free systems to clarify intrinsic CNT-thiol interactions. We demonstrated that the redox reaction of CNTs with cysteine, containing a thiol group, leads to disulfide bond formation between cysteine molecules, even under acidic conditions. The generality of the redox reaction is validated using other thiols such as dithiothreitol and glutathione. The present results suggest that structures of proteins and peptides containing free thiol groups are chemically modified and misfolded on CNT surfaces by this disulfide bond formation in biological systems.
Collapse
Affiliation(s)
- A Hirano
- Nanomaterials Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8565, Japan.
| | | | | | | | | | | |
Collapse
|
8
|
Zhou Z, Song J, Nie L, Chen X. Reactive oxygen species generating systems meeting challenges of photodynamic cancer therapy. Chem Soc Rev 2016; 45:6597-6626. [PMID: 27722328 PMCID: PMC5118097 DOI: 10.1039/c6cs00271d] [Citation(s) in RCA: 1195] [Impact Index Per Article: 149.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The reactive oxygen species (ROS)-mediated mechanism is the major cause underlying the efficacy of photodynamic therapy (PDT). The PDT procedure is based on the cascade of synergistic effects between light, a photosensitizer (PS) and oxygen, which greatly favors the spatiotemporal control of the treatment. This procedure has also evoked several unresolved challenges at different levels including (i) the limited penetration depth of light, which restricts traditional PDT to superficial tumours; (ii) oxygen reliance does not allow PDT treatment of hypoxic tumours; (iii) light can complicate the phototherapeutic outcomes because of the concurrent heat generation; (iv) specific delivery of PSs to sub-cellular organelles for exerting effective toxicity remains an issue; and (v) side effects from undesirable white-light activation and self-catalysation of traditional PSs. Recent advances in nanotechnology and nanomedicine have provided new opportunities to develop ROS-generating systems through photodynamic or non-photodynamic procedures while tackling the challenges of the current PDT approaches. In this review, we summarize the current status and discuss the possible opportunities for ROS generation for cancer therapy. We hope this review will spur pre-clinical research and clinical practice for ROS-mediated tumour treatments.
Collapse
Affiliation(s)
- Zijian Zhou
- Center for Molecular Imaging and Translational Medicine, State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, School of Public Health, Xiamen University, Xiamen 361102, China. and Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, MD 20892, USA.
| | - Jibin Song
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, MD 20892, USA.
| | - Liming Nie
- Center for Molecular Imaging and Translational Medicine, State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, School of Public Health, Xiamen University, Xiamen 361102, China.
| | - Xiaoyuan Chen
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, MD 20892, USA.
| |
Collapse
|
9
|
Highly Efficient and Stable Novel NanoBiohybrid Catalyst to Avert 3,4-Dihydroxybenzoic Acid Pollutant in Water. Sci Rep 2016; 6:33572. [PMID: 27721429 PMCID: PMC5056344 DOI: 10.1038/srep33572] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Accepted: 08/25/2016] [Indexed: 11/08/2022] Open
Abstract
The present study reported for the first time covalent immobilization of protocatechuate 3,4-dioxygenase (3,4-POD) onto functionalized multi-walled carbon nanotubes (F-MWCNT) for degrading the toxic 3,4-dihydroxybenzoic acid (3,4-DHBA) pollutant in water. The F-MWCNTs had a maximum 3,4-POD loading of 1060 μg/mg. Immobilized 3,4 POD had 44% of relative structural changes to its free configurations. Nevertheless, >90% of relative activity and about 50% of catalytic efficiency were retained to the free enzyme. Immobilized 3,4-POD demonstrated higher alkaline stability and thermostability than the free 3,4-POD. The free and immobilized 3,4-POD lost 82% and 66% of relative activities, respectively after 180 min of incubations at 90 °C. Excellent shelf-life was observed for the immobilized 3,4-POD with residual activity of 56% compared with 41% and 39% of the free 3,4-POD at 4 °C and 25 °C over 30 days storage. Immobilized 3,4-POD showed >60% of catalytic activity retention even after ten-cycle uses, defraying the expenses of free 3,4-POD productions for long term uses. Finally, the immobilized 3,4-POD removed 71% of 3,4-DHBA from water in <4 h, paving its future application for water purification with reduced costs and time.
Collapse
|
10
|
Biopersistence of PEGylated Carbon Nanotubes Promotes a Delayed Antioxidant Response after Infusion into the Rat Hippocampus. PLoS One 2015; 10:e0129156. [PMID: 26075787 PMCID: PMC4468090 DOI: 10.1371/journal.pone.0129156] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2014] [Accepted: 05/05/2015] [Indexed: 12/20/2022] Open
Abstract
Carbon nanotubes are promising nanomaterials for the diagnosis and treatment of brain disorders. However, the ability of these nanomaterials to cross cell membranes and interact with neural cells brings the need for the assessment of their potential adverse effects on the nervous system. This study aimed to investigate the biopersistence of single-walled carbon nanotubes functionalized with polyethylene glycol (SWCNT-PEG) directly infused into the rat hippocampus. Contextual fear conditioning, Y-maze and open field tasks were performed to evaluate the effects of SWCNT-PEG on memory and locomotor activity. The effects of SWCNT-PEG on oxidative stress and morphology of the hippocampus were assessed 1 and 7 days after infusion of the dispersions at 0.5, 1.0 and 2.1 mg/mL. Raman analysis of the hippocampal homogenates indicates the biopersistence of SWCNT-PEG in the hippocampus 7 days post-injection. The infusion of the dispersions had no effect on the acquisition or persistence of the contextual fear memory; likewise, the spatial recognition memory and locomotor activity were not affected by SWCNT-PEG. Histological examination revealed no remarkable morphological alterations after nanomaterial exposure. One day after the infusion, SWCNT-PEG dispersions at 0.5 and 1.0 mg/mL were able to decrease total antioxidant capacity without modifying the levels of reactive oxygen species or lipid hydroperoxides in the hippocampus. Moreover, SWCNT-PEG dispersions at all concentrations induced antioxidant defenses and reduced reactive oxygen species production in the hippocampus at 7 days post-injection. In this work, we found a time-dependent change in antioxidant defenses after the exposure to SWCNT-PEG. We hypothesized that the persistence of the nanomaterial in the tissue can induce an antioxidant response that might have provided resistance to an initial insult. Such antioxidant delayed response may constitute an adaptive response to the biopersistence of SWCNT-PEG in the hippocampus.
Collapse
|
11
|
|
12
|
Liu Y, Ren L, Yan D, Zhong W. Mechanistic Study on the Reduction of SWCNT-induced Cytotoxicity by Albumin Coating. PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION : MEASUREMENT AND DESCRIPTION OF PARTICLE PROPERTIES AND BEHAVIOR IN POWDERS AND OTHER DISPERSE SYSTEMS 2014; 31:1244-1251. [PMID: 25580058 PMCID: PMC4286347 DOI: 10.1002/ppsc.201400145] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Indexed: 05/04/2023]
Abstract
Single walled carbon nanotubes (SWCNTs) are utilized in many areas, accompanied with the ever rising safety concerns. Coating the SWCNTs by serum albumin has shown promises in reduction of their cytotoxicity. The cause of toxicity reduction could be due to the blockage of cellular protein adsorption by bovine serum albumin (BSA). Here, our study explored the mechanism of toxicity reduction from the point of view of protein adsorption. Different loadings of BSA led to varied surface coverage of the SWCNTs, which was positively related to the level of cytotoxicity. In addition, the BSA-coated SWCNTs were tested for their surface morphology change, cellular uptake, and adsorption of cellular proteins. BSA could be competed off the SWCNT surface by the cytosol proteins, and thus a higher BSA loading was needed to provide better protection to the cells. Cellular uptake was also reduced with a higher BSA loading. Moreover, the BSA coating changed the surface property of SWCNTs, and as a consequence, altered the types of proteins adsorbed by the SWCNTs. Our results support that adsorption of BSA reduces cellular uptake of SWCNTs as well as adsorption of cellular proteins on SWCNTs, both contributing to the much lower cytotoxicity observed for the BSA-coated SWCNTs.
Collapse
Affiliation(s)
- Yang Liu
- Environmental Toxicology Graduate Program, University of California, Riverside, CA 92521, USA
| | - Lei Ren
- Environmental Toxicology Graduate Program, University of California, Riverside, CA 92521, USA
| | - Dong Yan
- Center for Nanoscale Science and Engineering, University of California, Riverside, CA 92521, USA
| | - Wenwan Zhong
- Environmental Toxicology Graduate Program and Department of Chemistry, University of California, Riverside, CA 92521, USA
| |
Collapse
|
13
|
Hsieh HS, Wu R, Jafvert CT. Light-independent reactive oxygen species (ROS) formation through electron transfer from carboxylated single-walled carbon nanotubes in water. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2014; 48:11330-11336. [PMID: 25171301 DOI: 10.1021/es503163w] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Promising developments in application of carbon nanotubes (CNTs) have raised concern regarding potential biological and environmental effects upon their inevitable release to the environment. Although some CNTs have been reported to generate reactive oxygen species (ROS) under light, limited information exists on ROS generation by these materials in the dark. In this study, generation of ROS was examined, initiated by electron transfer from biological electron donors through carboxylated single-walled carbon nanotubes (C-SWCNT) to molecular oxygen in water in the dark. In the presence of C-SWCNT, the oxidation of NADH (β-nicotinamide adenine dinucleotide, reduced form) and DTTre (DL-dithiothreitol, reduced form) was confirmed by light absorbance shifts (340 nm to 260 nm during oxidation of NADH to NAD(+), and increased light absorbance at 280 nm during oxidation of DTTre). Production of superoxide anion (O2(•-)) was detected by its selective reaction with a tetrazolium salt (NBT(2+)), forming a formazan product that is visible at 530 nm. A modified acid-quenched N,N-diethyl-p-phenylenediamine (DPD) assay was used to measure the accumulation of H2O2 in C-SWCNT suspensions containing O2 and NADH. In the same suspensions (i.e., containing C-SWCNT, NADH, and O2), pBR322 DNA plasmid was cleaved, although •OH was not detected when using •OH scavenging molecular probes. These results indicate that the oxidation of electron donors by C-SWCNT can be a light-independent source of ROS in water, and that electron shuttling through CNTs to molecular oxygen may be a potential mechanism for DNA damage by this specific CNT and potentially other carbon-based nanomaterials.
Collapse
Affiliation(s)
- Hsin-Se Hsieh
- Purdue University , Lyles School of Civil Engineering and Division of Environmental and Ecological Engineering, West Lafayette, Indiana 47907, United States
| | | | | |
Collapse
|
14
|
Subrizi F, Crucianelli M, Grossi V, Passacantando M, Pesci L, Saladino R. Carbon Nanotubes as Activating Tyrosinase Supports for the Selective Synthesis of Catechols. ACS Catal 2014. [DOI: 10.1021/cs400856e] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Fabiana Subrizi
- Department
of Physical and Chemical Sciences, University of L’Aquila, Via
Vetoio, I-67100 Coppito, AQ, Italy
| | - Marcello Crucianelli
- Department
of Physical and Chemical Sciences, University of L’Aquila, Via
Vetoio, I-67100 Coppito, AQ, Italy
| | - Valentina Grossi
- Department
of Physical and Chemical Sciences, University of L’Aquila, Via
Vetoio, I-67100 Coppito, AQ, Italy
| | - Maurizio Passacantando
- Department
of Physical and Chemical Sciences, University of L’Aquila, Via
Vetoio, I-67100 Coppito, AQ, Italy
| | - Lorenzo Pesci
- Department
of Ecology and Biology, University of Tuscia, Largo dell’Università, 01100 Viterbo, VT, Italy
| | - Raffaele Saladino
- Department
of Ecology and Biology, University of Tuscia, Largo dell’Università, 01100 Viterbo, VT, Italy
| |
Collapse
|
15
|
Kim JY, Kim KH, Yoon SB, Kim HK, Park SH, Kim KB. In situ chemical synthesis of ruthenium oxide/reduced graphene oxide nanocomposites for electrochemical capacitor applications. NANOSCALE 2013; 5:6804-6811. [PMID: 23765196 DOI: 10.1039/c3nr01233f] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
An in situ chemical synthesis approach has been developed to prepare ruthenium oxide/reduced graphene oxide (RGO) nanocomposites. It is found that as the C/O ratio increases, the number density of RuO2 nanoparticles decreases, because the chemical interaction between the Ru ions and the oxygen-containing functional groups provides anchoring sites where the nucleation of particles takes place. For electrochemical capacitor applications, the microwave-hydrothermal process was carried out to improve the conductivity of RGO in RuO2/RGO nanocomposites. The significant improvement in capacitance and high rate capability might result from the RuO2 nanoparticles used as spacers that make the interior layers of the reduced graphene oxide electrode available for electrolyte access.
Collapse
Affiliation(s)
- Ji-Young Kim
- Department of Material Science and Engineering, Yonsei University, 134 Shinchon-dong, Seodaemun-ku, Seoul, Korea 120-749
| | | | | | | | | | | |
Collapse
|
16
|
Song M, Zeng L, Yuan S, Yin J, Wang H, Jiang G. Study of cytotoxic effects of single-walled carbon nanotubes functionalized with different chemical groups on human MCF7 cells. CHEMOSPHERE 2013; 92:576-582. [PMID: 23648328 DOI: 10.1016/j.chemosphere.2013.03.058] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2012] [Revised: 03/06/2013] [Accepted: 03/22/2013] [Indexed: 06/02/2023]
Abstract
Functionalization is an important technique to increase the solubility and biocompatibility of single-wall carbon nanotubes (SWCNTs). In this study, we investigated the cytotoxicity of four types of SWCNTs functionalized with hydroxyl, amino, carboxyl and polyethyleneglycol on MCF7 cells. These functionalized SWCNTs (f-SWCNTs) have insignificant effects on mitochondrial activity and ROS production in MCF7 cells at all test concentrations. However, explicit results revealed that all the tested f-SWCNTs could cause changes of cell morphology, induce cell membrane damage, decrease cell adhesion, and increase cell apoptosis. Therefore, this study shows the potential side effects of f-SWCNTs accompanying with the increase of dispersibility and stability in environment or serum (to prevent their aggregation), and highlights the need for further research to examine the potential toxicity of f-SWCNTs before they are used in the environmental and biomedical fields.
Collapse
Affiliation(s)
- Maoyong Song
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China
| | | | | | | | | | | |
Collapse
|
17
|
da Rocha AM, Ferreira JR, Barros DM, Pereira TCB, Bogo MR, Oliveira S, Geraldo V, Lacerda RG, Ferlauto AS, Ladeira LO, Pinheiro MVB, Monserrat JM. Gene expression and biochemical responses in brain of zebrafish Danio rerio exposed to organic nanomaterials: carbon nanotubes (SWCNT) and fullerenol (C60(OH)18-22(OK4)). Comp Biochem Physiol A Mol Integr Physiol 2013; 165:460-7. [PMID: 23542748 DOI: 10.1016/j.cbpa.2013.03.025] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2012] [Revised: 03/17/2013] [Accepted: 03/21/2013] [Indexed: 12/31/2022]
Abstract
Nanomaterials (NM) industry had grown in the last decade, although there are few studies concerning its potential toxicity effects on aquatic organisms. In this study the freshwater zebrafish (Danio rerio) was exposed to two kinds of carbon NM, single-wall carbon nanotubes (SWCNT) and fullerenol [C60(OH)18-22(OK4)] to analyze oxidative stress responses on fish brain. Adult zebrafish (mean mass: 0.52±0.01g) were submitted to intraperitoneal injections of SWCNT suspension and fullerenol solution (30mg/kg of fish), receiving one or two doses with a time interval of 24h. Results showed that total antioxidant capacity was lowered in brains of fish exposed 24h to fullerenol when compared to those from SWCNT treatment (p<0.05). After 48h, fullerenol induced higher expression of both catalytic and regulatory subunits of enzyme glutamate cysteine ligase when compared to control group (p<0.05), indicating an antioxidant behavior. In vitro assays showed a dual effect of SWCNT, since a pro-oxidant behavior was observed at low concentrations (0.1 and 1.0mg/L) and an antioxidant one at the highest concentration (10.0mg/L). Few biological responses were altered by this NM: decrease in total antioxidant capacity and induction of the expression of the transcription factor Nrf2 when compared to control group.
Collapse
|
18
|
Patel HJ, Kwon S. Length-dependent effect of single-walled carbon nanotube exposure in a dynamic cell growth environment of human alveolar epithelial cells. JOURNAL OF EXPOSURE SCIENCE & ENVIRONMENTAL EPIDEMIOLOGY 2013; 23:101-108. [PMID: 22854519 DOI: 10.1038/jes.2012.75] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2012] [Accepted: 06/11/2012] [Indexed: 06/01/2023]
Abstract
Despite the great use of nanomaterials for engineering and medical applications, nanomaterials may have adverse consequences by accidental exposure, because of their nanoscale size, composition and shape. Like many nanomaterials, carbon nanotubes (CNTs) have been used for many proven applications, but the size of the CNTs makes them more readily become airborne and can therefore create the risk of being inhaled by a worker. In this study, we evaluated single-walled CNT (SWCNT)-induced effects on cellular responses such as cell proliferation, inflammatory response and oxidative stress in dynamic cell growth condition. A dynamic cell growth environment was established to mimic the dynamic changes in the amount of circumferential and longitudinal expansion and contraction occurred during normal breathing movement in the lung. Two different length (short: outer diameter (OD) 1-2 nm, length 0.5-2 μm; long: OD 1-2 nm, length 5-30 μm) of SWCNTs were used at different exposure concentrations (5, 10 and 20 μg/ml) during the different exposure duration (24, 48 and 72 h). Dynamic environment facilitated altered interaction between SWCNTs and A549 monolayer. Cellular responses in dynamic condition were significantly different from those in static condition. Moreover, cellular responses were dependent on the length of SWCNTs both in static and dynamic cell growth conditions.
Collapse
Affiliation(s)
- Hemang J Patel
- Department of Biological Engineering, Utah State University, Logan, Utah 84322, USA
| | | |
Collapse
|
19
|
Ren L, Yan D, Zhong W. Enhanced enzyme activity through electron transfer between single-walled carbon nanotubes and horseradish peroxidase. CARBON 2012; 50:1303-1310. [PMID: 22228910 PMCID: PMC3249833 DOI: 10.1016/j.carbon.2011.10.053] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Better understanding of electron transfer (ET) taking place at the nano-bio interface can guide design of more effective functional materials used in fuel cells, biosensors, and medical devices. Single-walled carbon nanotube (SWCNT) coupled with biological enzymes serves as a model system for studying the ET mechanism, as demonstrated in the present study. SWCNT enhanced the activity of horseradish peroxidase (HRP) in the solution-based redox reaction by binding to HRP at a site proximate to the enzyme's activity center and participating in the ET process. ET to and from SWCNT was clearly observable using near-infrared spectroscopy. The capability of SWCNT in receiving electrons and the direct attachment of HRP to the surface of SWCNT strongly affected the enzyme activity due to the direct involvement of SWCNT in ET.
Collapse
Affiliation(s)
- Lei Ren
- Environmental Toxicology Graduate Program, University of California, Riverside, CA, 92521, USA
| | - Dong Yan
- Center for Nanoscale Science and Engineering, University of California, Riverside, CA, 92521, USA
| | - Wenwan Zhong
- Environmental Toxicology Graduate Program, University of California, Riverside, CA, 92521, USA
- Department of Chemistry, University of California, Riverside, CA, 92521, USA
- Corresponding Author. Tel: +1 951 8274925.
| |
Collapse
|
20
|
Liu X, Sen S, Liu J, Kulaots I, Geohegan D, Kane A, Puretzky AA, Rouleau CM, More KL, Palmore GTR, Hurt RH. Antioxidant deactivation on graphenic nanocarbon surfaces. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2011; 7:2775-85. [PMID: 21818846 PMCID: PMC3634619 DOI: 10.1002/smll.201100651] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2011] [Revised: 05/25/2011] [Indexed: 05/18/2023]
Abstract
This article reports a direct chemical pathway for antioxidant deactivation on the surfaces of carbon nanomaterials. In the absence of cells, carbon nanotubes are shown to deplete the key physiological antioxidant glutathione (GSH) in a reaction involving dissolved dioxygen that yields the oxidized dimer, GSSG, as the primary product. In both chemical and electrochemical experiments, oxygen is only consumed at a significant steady-state rate in the presence of both nanotubes and GSH. GSH deactivation occurs for single- and multi-walled nanotubes, graphene oxide, nanohorns, and carbon black at varying rates that are characteristic of the material. The GSH depletion rates can be partially unified by surface area normalization, are accelerated by nitrogen doping, and suppressed by defect annealing or addition of proteins or surfactants. It is proposed that dioxygen reacts with active sites on graphenic carbon surfaces to produce surface-bound oxygen intermediates that react heterogeneously with glutathione to restore the carbon surface and complete a catalytic cycle. The direct catalytic reaction between nanomaterial surfaces and antioxidants may contribute to oxidative stress pathways in nanotoxicity, and the dependence on surface area and structural defects suggest strategies for safe material design.
Collapse
Affiliation(s)
- Xinyuan Liu
- Department of Chemistry, Brown University, Providence, RI
| | - Sujat Sen
- Department of Chemistry, Brown University, Providence, RI
| | - Jingyu Liu
- Department of Chemistry, Brown University, Providence, RI
| | | | - David Geohegan
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN
| | - Agnes Kane
- Department of Pathology and Laboratory Medicine, Brown University, Providence, RI
- Institute for Molecular and Nanoscale Innovation, Brown University, Providence, RI
| | - Alex A. Puretzky
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN
| | | | - Karren L. More
- Shared Research Equipment Facility, Oak Ridge National Laboratory, Oak Ridge, TN
| | - G. Tayhas R. Palmore
- Department of Chemistry, Brown University, Providence, RI
- School of Engineering, Brown University, Providence, RI
- Institute for Molecular and Nanoscale Innovation, Brown University, Providence, RI
| | - Robert H. Hurt
- School of Engineering, Brown University, Providence, RI
- Institute for Molecular and Nanoscale Innovation, Brown University, Providence, RI
| |
Collapse
|