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Jiang X, Boudreau MD, Fu PP, Yin JJ. Applications of electron spin resonance spectroscopy in photoinduced nanomaterial charge separation and reactive oxygen species generation. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART C, TOXICOLOGY AND CARCINOGENESIS 2021; 39:435-459. [PMID: 35895951 DOI: 10.1080/26896583.2021.1971477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Nano-metals, nano-metal oxides, and carbon-based nanomaterials exhibit superior solar-to-chemical/photo-electron transfer properties and are potential candidates for environmental remediations and energy transfer. Recent research effort focuses on enhancing the efficiency of photoinduced electron-hole separation to improve energy transfer in catalytic reactions. Electron spin resonance (ESR) spectroscopy has been used to monitor the generation of electron/hole and reactive oxygen species (ROS) during nanomaterial-mediated photocatalysis. Using ESR coupled with spin trapping and spin labeling techniques, the underlying photocatalytic mechanism involved in the nanomaterial-mediated photocatalysis was investigated. In this review, we briefly introduced ESR principle and summarized recent advancements using ESR spectroscopy to characterize electron-hole separation and ROS production by different types of nanomaterials.
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Affiliation(s)
- Xiumei Jiang
- Division of Analytical Chemistry, Center for Food Safety and Applied Nutrition, U.S. Food and Drug Administration, College Park, MD, USA
| | - Mary D Boudreau
- Division of Biochemical Toxicology, National Center for Toxicological Research, U.S. Food and Drug Administration, Jefferson, AR, USA
| | - Peter P Fu
- Division of Biochemical Toxicology, National Center for Toxicological Research, U.S. Food and Drug Administration, Jefferson, AR, USA
| | - Jun-Jie Yin
- Division of Analytical Chemistry, Center for Food Safety and Applied Nutrition, U.S. Food and Drug Administration, College Park, MD, USA
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2
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Barba FJ, Roohinejad S, Ishikawa K, Leong SY, El-Din A Bekhit A, Saraiva JA, Lebovka N. Electron spin resonance as a tool to monitor the influence of novel processing technologies on food properties. Trends Food Sci Technol 2020. [DOI: 10.1016/j.tifs.2020.03.032] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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3
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Jiang X, Gray P, Patel M, Zheng J, Yin JJ. Crossover between anti- and pro-oxidant activities of different manganese oxide nanoparticles and their biological implications. J Mater Chem B 2020; 8:1191-1201. [PMID: 31967629 DOI: 10.1039/c9tb02524c] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Manganese oxide nanoparticles (MnOx NPs) have been suggested to possess several enzyme-like activities. However, studies often used either color change or fluorescence to determine the catalytic activity. Despite the simplicity and sensitivity of these probes, these methods may give distracting artifacts or not reflect the catalytic activities in biological systems. To address this issue, herein, we used electron spin resonance (ESR) spectroscopy, a technique proven effective in identifying and quantifying the free radicals produced/scavenged in nanomaterial-catalyzed reactions, to systematically evaluate the catalytic activities of three MnOx NPs (MnO2, Mn2O3, and Mn3O4 NPs) towards biologically relevant antioxidants (ascorbate and glutathione (GSH)) and reactive oxygen species (ROS) (hydrogen peroxide (H2O2), superoxide anion, and hydroxyl radical). We found that all three MnOx NPs possess both pro- and anti-oxidant activities, including oxidase-, catalase-, and superoxide dismutase (SOD)-like activities but without peroxidase-like or hydroxyl radical scavenging activity. In addition, there are differences among these MnOx NPs in their catalytic activities towards different reactions. Mn2O3 shows the strongest ascorbate oxidation activity, followed by MnO2 and Mn3O4, while Mn3O4 shows the strongest oxidation efficiency towards GSH compared to Mn2O3 and MnO2. In the catalyzed decomposition of H2O2, MnO2 NPs show higher efficiency in the generation of molecular oxygen than Mn2O3 or Mn3O4. Cellular studies indicate that all three MnOx NPs induced concentration-dependent decreases in the cell viability, with Mn3O4 > Mn3O2 > MnO2. At lower concentrations (<100 μM), consistent with the enzyme-like activities detected in solution, all three NPs significantly decreased H2O2-induced cytotoxicity in Caco-2 cells. Our study determined the multi-enzymatic activities of MnOx NPs and exhibited differences among MnOx NPs of different valences in their enzyme-like activities and their biological implications; these results provide valuable information for safe and efficient applications of MnOx NPs as ROS-scavenging biomedical nanomaterials.
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Affiliation(s)
- Xiumei Jiang
- Division of Analytical Chemistry and Division of Bioanalytical Chemistry, Office of Regulatory Science, Center for Food Safety and Applied Nutrition, U.S. Food and Drug Administration, College Park, Maryland 20740, USA.
| | - Patrick Gray
- Division of Analytical Chemistry and Division of Bioanalytical Chemistry, Office of Regulatory Science, Center for Food Safety and Applied Nutrition, U.S. Food and Drug Administration, College Park, Maryland 20740, USA.
| | - Mehulkumar Patel
- Division of Biology, Chemistry and Materials Science, Office of Science and Engineering Laboratories, Center for Devices and Radiological Health, U.S. Food and Drug Administration, Silver Spring, Maryland 20993, USA
| | - Jiwen Zheng
- Division of Biology, Chemistry and Materials Science, Office of Science and Engineering Laboratories, Center for Devices and Radiological Health, U.S. Food and Drug Administration, Silver Spring, Maryland 20993, USA
| | - Jun-Jie Yin
- Division of Analytical Chemistry and Division of Bioanalytical Chemistry, Office of Regulatory Science, Center for Food Safety and Applied Nutrition, U.S. Food and Drug Administration, College Park, Maryland 20740, USA.
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Cao GJ, Fisher CM, Jiang X, Chong Y, Zhang H, Guo H, Zhang Q, Zheng J, Knolhoff AM, Croley TR, Yin JJ. Platinum nanoparticles: an avenue for enhancing the release of nitric oxide from S-nitroso-N-acetylpenicillamine and S-nitrosoglutathione. NANOSCALE 2018; 10:11176-11185. [PMID: 29873378 DOI: 10.1039/c8nr03874k] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Nitric oxide (NO) is an endogenous bioregulator with established roles in diverse fields. The difficulty in the modulation of NO release is still a significant obstacle to achieving successful clinical applications. We report herein our initial work using electron spin resonance (ESR) spectroscopy to detect NO generated from S-nitroso-N-acetylpenicillamine (SNAP) and S-nitrosoglutathione (GSNO) donors catalyzed by platinum nanoparticles (Pt NPs, 3 nm) under physiological conditions. With ESR spectroscopy coupled with spin trapping and spin labeling techniques, we identified that Pt NPs can significantly promote the generation of NO from SNAP and GSNO under physiological conditions. A classic NO colorimetric detection kit was also employed to verify that Pt NPs truly triggered the release of NO from its donors. Pt NPs can act as promising delivery vehicles for on-demand NO delivery based on time and dosage. These results, along with the detection of the resulting disulfide product, were confirmed with mass spectrometry. In addition, cellular experiments provided a convincing demonstration that the triggered release of NO from its donors by Pt NPs is efficient in killing human cancer cells in vitro. The catalytic mechanism was elucidated by X-ray photo-electron spectroscopy (XPS) and ultra-high performance liquid chromatography/high-resolution mass spectrometry (UHPLC-HRMS), which suggested that Pt-S bond formation occurs in the solution of Pt NPs and NO donors. Identification of Pt NPs capable of generating NO from S-nitrosothiols (RSNOs) is an important step in harnessing NO for investigations into its clinical applications and therapies.
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Affiliation(s)
- Gao-Juan Cao
- Department of Applied Chemistry, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
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Cao GJ, Jiang X, Zhang H, Croley TR, Yin JJ. Mimicking horseradish peroxidase and oxidase using ruthenium nanomaterials. RSC Adv 2017. [DOI: 10.1039/c7ra10370k] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Ru NPs could catalyze the oxidation of 3,3,5,5-tetramethylbenzidine, o-phenylenediamine and dopamine hydrochloride in the presence of H2O2, and also catalyze the oxidization of 3,3,5,5-tetramethylbenzidine and sodium l-ascorbate by dissolved oxygen.
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Affiliation(s)
- Gao-Juan Cao
- Department of Applied Chemistry
- College of Life Sciences
- Fujian Agriculture and Forestry University
- Fuzhou
- China
| | - Xiumei Jiang
- Division of Analytical Chemistry
- Office of Regulatory Science
- Center for Food Safety and Applied Nutrition
- U.S. Food and Drug Administration
- College Park
| | - Hui Zhang
- Division of Analytical Chemistry
- Office of Regulatory Science
- Center for Food Safety and Applied Nutrition
- U.S. Food and Drug Administration
- College Park
| | - Timothy R. Croley
- Division of Analytical Chemistry
- Office of Regulatory Science
- Center for Food Safety and Applied Nutrition
- U.S. Food and Drug Administration
- College Park
| | - Jun-Jie Yin
- Division of Analytical Chemistry
- Office of Regulatory Science
- Center for Food Safety and Applied Nutrition
- U.S. Food and Drug Administration
- College Park
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Liu CP, Wu TH, Lin YL, Liu CY, Wang S, Lin SY. Tailoring Enzyme-Like Activities of Gold Nanoclusters by Polymeric Tertiary Amines for Protecting Neurons Against Oxidative Stress. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2016; 12:4127-35. [PMID: 27346719 DOI: 10.1002/smll.201503919] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2015] [Revised: 05/06/2016] [Indexed: 05/18/2023]
Abstract
The cytotoxicity of nanozymes has drawn much attention recently because their peroxidase-like activity can decompose hydrogen peroxide (H2 O2 ) to produce highly toxic hydroxyl radicals (•OH) under acidic conditions. Although catalytic activities of nanozymes are highly associated with their surface properties, little is known about the mechanism underlying the surface coating-mediated enzyme-like activities. Herein, it is reported for the first time that amine-terminated PAMAM dendrimer-entrapped gold nanoclusters (AuNCs-NH2 ) unexpectedly lose their peroxidase-like activity while still retaining their catalase-like activity in physiological conditions. Surprisingly, the methylated form of AuNCs-NH2 (i.e., MAuNCs-N(+) R3 , where R = H or CH3 ) results in a dramatic recovery of the intrinsic peroxidase-like activity while blocking most primary and tertiary amines (1°- and 3°-amines) of dendrimers to form quaternary ammonium ions (4°-amines). However, the hidden peroxidase-like activity is also found in hydroxyl-terminated dendrimer-encapsulated AuNCs (AuNCs-OH, inside backbone with 3°-amines), indicating that 3°-amines are dominant in mediating the peroxidase-like activity. The possible mechanism is further confirmed that the enrichment of polymeric 3°-amines on the surface of dendrimer-encapsulated AuNCs provides sufficient suppression of the critical mediator •OH for the peroxidase-like activity. Finally, it is demonstrated that AuNCs-NH2 with diminished cytotoxicity have great potential for use in primary neuronal protection against oxidative damage.
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Affiliation(s)
- Ching-Ping Liu
- Institute of Biomedical Engineering and Nanomedicine, National Health Research Institutes, 35 Keyan Road, Zhunan, 350, Taiwan
- Department of Chemistry, Fu Jen Catholic University, 510 Zhongzheng Road, Xinzhuang District, New Taipei City, 242, Taiwan
| | - Te-Haw Wu
- Institute of Biomedical Engineering and Nanomedicine, National Health Research Institutes, 35 Keyan Road, Zhunan, 350, Taiwan
| | - Yu-Lung Lin
- Institute of Biomedical Engineering and Nanomedicine, National Health Research Institutes, 35 Keyan Road, Zhunan, 350, Taiwan
| | - Chia-Yeh Liu
- Institute of Biomedical Engineering and Nanomedicine, National Health Research Institutes, 35 Keyan Road, Zhunan, 350, Taiwan
| | - Sabrina Wang
- Institute of Anatomy and Cell Biology, School of Medicine, National Yang-Ming University, 155, Sec. 2, Linong Street, Taipei, 112, Taiwan
| | - Shu-Yi Lin
- Institute of Biomedical Engineering and Nanomedicine, National Health Research Institutes, 35 Keyan Road, Zhunan, 350, Taiwan
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Liu Y, Wu H, Chong Y, Wamer WG, Xia Q, Cai L, Nie Z, Fu PP, Yin JJ. Platinum Nanoparticles: Efficient and Stable Catechol Oxidase Mimetics. ACS APPLIED MATERIALS & INTERFACES 2015; 7:19709-19717. [PMID: 26305170 DOI: 10.1021/acsami.5b05180] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Although enzyme-like nanomaterials have been extensively investigated over the past decade, most research has focused on the peroxidase-like, catalase-like, or SOD-like activity of these nanomaterials. Identifying nanomaterials having oxidase-like activities has received less attention. In this study, we demonstrate that platinum nanoparticles (Pt NPs) exhibit catechol oxidase-like activity, oxidizing polyphenols into the corresponding o-quinones. Four unique approaches are employed to demonstrate the catechol oxidase-like activity exerted by Pt NPs. First, UV-vis spectroscopy is used to monitor the oxidation of polyphenols catalyzed by Pt NPs. Second, the oxidized products of polyphenols are identified by ultrahigh-performance liquid chromatography (UHPLC) separation followed by high-resolution mass spectrometry (HRMS) identification. Third, electron spin resonance (ESR) oximetry techniques are used to confirm the O2 consumption during the oxidation reaction. Fourth, the intermediate products of semiquinone radicals formed during the oxidation of polyphenols are determined by ESR using spin stabilization. These results indicate Pt NPs possess catechol oxidase-like activity. Because polyphenols and related bioactive substances have been explored as potent antioxidants that could be useful for the prevention of cancer and cardiovascular diseases, and Pt NPs have been widely used in the chemical industry and medical science, it is essential to understand the potential effects of Pt NPs for altering or influencing the antioxidant activity of polyphenols.
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Affiliation(s)
- Yi Liu
- Division of Analytical Chemistry, Office of Regulatory Science, Center for Food Safety and Applied Nutrition, U.S. Food and Drug Administration , College Park, Maryland 20740, United States
- Department of Chemistry and Biochemistry, University of Maryland , College Park, Maryland 20742, United States
| | - Haohao Wu
- Division of Analytical Chemistry, Office of Regulatory Science, Center for Food Safety and Applied Nutrition, U.S. Food and Drug Administration , College Park, Maryland 20740, United States
| | - Yu Chong
- Division of Analytical Chemistry, Office of Regulatory Science, Center for Food Safety and Applied Nutrition, U.S. Food and Drug Administration , College Park, Maryland 20740, United States
| | - Wayne G Wamer
- Division of Bioanalytical Chemistry, Office of Regulatory Science, Center for Food Safety and Applied Nutrition, U.S. Food and Drug Administration , College Park, Maryland 20740, United States
| | - Qingsu Xia
- Biochemical Toxicology Division, National Center for Toxicological Research, U.S. Food and Drug Administration , Jefferson, Arkansas 72079, United States
| | - Lining Cai
- Biotranex LLC , Monmouth Junction, New Jersey 08852, United States
| | - Zhihong Nie
- Department of Chemistry and Biochemistry, University of Maryland , College Park, Maryland 20742, United States
| | - Peter P Fu
- Biochemical Toxicology Division, National Center for Toxicological Research, U.S. Food and Drug Administration , Jefferson, Arkansas 72079, United States
| | - Jun-Jie Yin
- Division of Analytical Chemistry, Office of Regulatory Science, Center for Food Safety and Applied Nutrition, U.S. Food and Drug Administration , College Park, Maryland 20740, United States
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He W, Jia H, Yang D, Xiao P, Fan X, Zheng Z, Kim HK, Wamer WG, Yin JJ. Composition Directed Generation of Reactive Oxygen Species in Irradiated Mixed Metal Sulfides Correlated with Their Photocatalytic Activities. ACS APPLIED MATERIALS & INTERFACES 2015; 7:16440-16449. [PMID: 26158231 DOI: 10.1021/acsami.5b03626] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The ability of nanostructures to facilitate the generation of reactive oxygen species and charge carriers underlies many of their chemical and biological activities. Elucidating which factors are essential and how these influence the production of various active intermediates is fundamental to understanding potential applications of these nanostructures, as well as potential risks. Using electron spin resonance spectroscopy coupled with spin trapping and spin labeling techniques, we assessed 3 mixed metal sulfides of varying compositions for their abilities to generate reactive oxygen species, photogenerate electrons, and consume oxygen during photoirradiation. We found these irradiated mixed metal sulfides exhibited composition dependent generation of ROS: ZnIn2S4 can generate (•)OH, O2(-•) and (1)O2; CdIn2S4 can produce O2(-•) and (1)O2, while AgInS2 only produces O2(-•). Our characterizations of the reactivity of the photogenerated electrons and consumption of dissolved oxygen, performed using spin labeling, showed the same trend in activity: ZnIn2S4 > CdIn2S4 > AgInS2. These intrinsic abilities to generate ROS and the reactivity of charge carriers correlated closely with the photocatalytic degradation and photoassisted antibacterial activities of these nanomaterials.
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Affiliation(s)
- Weiwei He
- †Key Laboratory of Micro-Nano Materials for Energy Storage and Conversion of Henan Province, Institute of Surface Micro and Nano Materials, Xuchang University, Xuchang, Henan 461000, P. R. China
- ‡Division of Bioanalytical Chemistry and Division of Analytical Chemistry, Office of Regulatory Science, Center for Food Safety and Applied Nutrition, U.S. Food and Drug Administration, College Park, Maryland 20740, United States
| | - Huimin Jia
- †Key Laboratory of Micro-Nano Materials for Energy Storage and Conversion of Henan Province, Institute of Surface Micro and Nano Materials, Xuchang University, Xuchang, Henan 461000, P. R. China
| | - Dongfang Yang
- †Key Laboratory of Micro-Nano Materials for Energy Storage and Conversion of Henan Province, Institute of Surface Micro and Nano Materials, Xuchang University, Xuchang, Henan 461000, P. R. China
| | - Pin Xiao
- §School of Materials Science and Engineering, State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, China
| | - Xiaoli Fan
- §School of Materials Science and Engineering, State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, China
| | - Zhi Zheng
- †Key Laboratory of Micro-Nano Materials for Energy Storage and Conversion of Henan Province, Institute of Surface Micro and Nano Materials, Xuchang University, Xuchang, Henan 461000, P. R. China
| | - Hyun-Kyung Kim
- ∥Food Safety Bureau, Ministry of Food and Drug Safety, Osong Health Technology Administration Complex 363-700, Republic of Korea
| | - Wayne G Wamer
- ‡Division of Bioanalytical Chemistry and Division of Analytical Chemistry, Office of Regulatory Science, Center for Food Safety and Applied Nutrition, U.S. Food and Drug Administration, College Park, Maryland 20740, United States
| | - Jun-Jie Yin
- ‡Division of Bioanalytical Chemistry and Division of Analytical Chemistry, Office of Regulatory Science, Center for Food Safety and Applied Nutrition, U.S. Food and Drug Administration, College Park, Maryland 20740, United States
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Lee JW, Yoon S, Lo YM, Wu H, Lee SY, Moon B. Intrinsic polyphenol oxidase-like activity of gold@platinum nanoparticles. RSC Adv 2015. [DOI: 10.1039/c5ra07636f] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Au@Pt NPs showed PPO mimetic activity over a wider range of pH and temperatures compared to PPO. In the oxidation of all substrates, Au@Pt NPs exhibited higher affinity to the substrates, especially to catechol and pyrogallol, compared with PPO.
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Affiliation(s)
- Jo-Won Lee
- Department of Food & Nutrition
- Chung-Ang University
- Seoul 156-756
- Korea
| | - Sohee Yoon
- Department of Food & Nutrition
- Chung-Ang University
- Seoul 156-756
- Korea
| | | | - Haohao Wu
- College of Food Science and Engineering
- Ocean University of China
- China
| | - Sook-Young Lee
- Department of Food & Nutrition
- Chung-Ang University
- Seoul 156-756
- Korea
| | - BoKyung Moon
- Department of Food & Nutrition
- Chung-Ang University
- Seoul 156-756
- Korea
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Kerrihard AL, Pegg RB, Sarkar A, Craft BD. Update on the methods for monitoring UFA oxidation in food products. EUR J LIPID SCI TECH 2014. [DOI: 10.1002/ejlt.201400119] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Adrian L. Kerrihard
- Department of Food Science & Technology, College of Agricultural and Environmental Sciences; The University of Georgia; Athens GA USA
| | - Ronald B. Pegg
- Department of Food Science & Technology, College of Agricultural and Environmental Sciences; The University of Georgia; Athens GA USA
| | - Anwesha Sarkar
- Nestlé Research Center; Vers-chez-les-Blanc; Lausanne Switzerland
| | - Brian D. Craft
- Nestlé Purina PetCare; 1 Checkerboard Square-3s; St. Louis MO USA
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He W, Liu Y, Wamer WG, Yin JJ. Electron spin resonance spectroscopy for the study of nanomaterial-mediated generation of reactive oxygen species. J Food Drug Anal 2014; 22:49-63. [PMID: 24673903 PMCID: PMC9359146 DOI: 10.1016/j.jfda.2014.01.004] [Citation(s) in RCA: 103] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2013] [Revised: 12/20/2013] [Accepted: 12/21/2013] [Indexed: 12/18/2022] Open
Abstract
Many of the biological applications and effects of nanomaterials are attributed to their ability to facilitate the generation of reactive oxygen species (ROS). Electron spin resonance (ESR) spectroscopy is a direct and reliable method to identify and quantify free radicals in both chemical and biological environments. In this review, we discuss the use of ESR spectroscopy to study ROS generation mediated by nanomaterials, which have various applications in biological, chemical, and materials science. In addition to introducing the theory of ESR, we present some modifications of the method such as spin trapping and spin labeling, which ultimately aid in the detection of short-lived free radicals. The capability of metal nanoparticles in mediating ROS generation and the related mechanisms are also presented.
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Affiliation(s)
- Weiwei He
- Key Laboratory of Micro-Nano Materials for Energy Storage and Conversion of Henan Province, Institute of Surface Micro and Nano Materials, Xuchang University, Xuchang, Henan, China; Center for Food Safety and Applied Nutrition, US Food and Drug Administration, College Park, MD 20740, USA
| | - Yitong Liu
- Center for Food Safety and Applied Nutrition, US Food and Drug Administration, College Park, MD 20740, USA
| | - Wayne G Wamer
- Center for Food Safety and Applied Nutrition, US Food and Drug Administration, College Park, MD 20740, USA
| | - Jun-Jie Yin
- Center for Food Safety and Applied Nutrition, US Food and Drug Administration, College Park, MD 20740, USA.
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Zhou YT, He W, Wamer WG, Hu X, Wu X, Lo YM, Yin JJ. Enzyme-mimetic effects of gold@platinum nanorods on the antioxidant activity of ascorbic acid. NANOSCALE 2013; 5:1583-1591. [PMID: 23329011 DOI: 10.1039/c2nr33072e] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Au@Pt nanorods were prepared by growing platinum nanodots on gold nanorods. Using electron spin resonance (ESR), we determined that the mechanisms for oxidation of ascorbic acid (AA) by Au@Pt nanorods and ascorbic acid oxidase (AAO) were kinetically similar and yielded similar products. In addition we observed that Au@Pt nanorods were stable with respect to temperature and pH. Using UV-VIS spectroscopy, the apparent kinetics of enzyme-mimetic activity of Au@Pt nanorods were studied and compared with the activity of AAO. With the help of ESR, we found that Au@Pt nanorods did not scavenge hydroxyl radicals but inhibited the antioxidant ability of AA for scavenging hydroxyl radicals produced by photoirradiating solutions containing titanium dioxide and zinc oxide. Moreover, the Au@Pt nanorods reduced the ability of AA to scavenge DPPH radicals and superoxide radicals. These results demonstrate that Au@Pt nanorods can reduce the antioxidant activity of AA. Therefore, it is necessary to consider the effects of using Pt nanoparticles together with other reducing agents or antioxidants such as AA due to the oxidase-like property of Au@Pt nanorods.
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Affiliation(s)
- Yu-Ting Zhou
- Center for Food Safety and Applied Nutrition, US Food and Drug Administration, College Park, MD 20740, USA
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13
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Intrinsic catalytic activity of Au nanoparticles with respect to hydrogen peroxide decomposition and superoxide scavenging. Biomaterials 2013; 34:765-73. [DOI: 10.1016/j.biomaterials.2012.10.010] [Citation(s) in RCA: 253] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2012] [Accepted: 10/04/2012] [Indexed: 12/11/2022]
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He W, Zhou YT, Wamer WG, Boudreau MD, Yin JJ. Mechanisms of the pH dependent generation of hydroxyl radicals and oxygen induced by Ag nanoparticles. Biomaterials 2012; 33:7547-55. [PMID: 22809647 DOI: 10.1016/j.biomaterials.2012.06.076] [Citation(s) in RCA: 257] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2012] [Accepted: 06/26/2012] [Indexed: 01/29/2023]
Abstract
Many of the chemical and biological effects of silver nanoparticles (Ag NPs) are attributed to the generation of reactive oxygen species (ROS). ESR spectroscopy was used to provide direct evidence for generating ROS during decomposition of H(2)O(2) assisted by Ag NPs. Hydroxyl radical formation was observed under acidic conditions and was accompanied by dissolution of Ag NPs. In contrast, evolution of O(2) was observed in alkaline solutions containing H(2)O(2) and Ag NPs; however, no net dissolution of Ag NPs was observed due to re-reduction of Ag(+) as evidenced by a cyclic reaction. Since H(2)O(2) is a biologically relevant product being continuously generated in cells, these results obtained under conditions mimicking different biological microenvironments may provide insights for finding new biomedical applications for Ag NPs and for risk assessment.
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Affiliation(s)
- Weiwei He
- Center for Food Safety and Applied Nutrition, US Food and Drug Administration, College Park, MD 20740, USA
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