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Takakusagi Y, Kobayashi R, Saito K, Kishimoto S, Krishna MC, Murugesan R, Matsumoto KI. EPR and Related Magnetic Resonance Imaging Techniques in Cancer Research. Metabolites 2023; 13:metabo13010069. [PMID: 36676994 PMCID: PMC9862119 DOI: 10.3390/metabo13010069] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 12/26/2022] [Accepted: 12/28/2022] [Indexed: 01/04/2023] Open
Abstract
Imaging tumor microenvironments such as hypoxia, oxygenation, redox status, and/or glycolytic metabolism in tissues/cells is useful for diagnostic and prognostic purposes. New imaging modalities are under development for imaging various aspects of tumor microenvironments. Electron Paramagnetic Resonance Imaging (EPRI) though similar to NMR/MRI is unique in its ability to provide quantitative images of pO2 in vivo. The short electron spin relaxation times have been posing formidable challenge to the technology development for clinical application. With the availability of the narrow line width trityl compounds, pulsed EPR imaging techniques were developed for pO2 imaging. EPRI visualizes the exogenously administered spin probes/contrast agents and hence lacks the complementary morphological information. Dynamic nuclear polarization (DNP), a phenomenon that transfers the high electron spin polarization to the surrounding nuclear spins (1H and 13C) opened new capabilities in molecular imaging. DNP of 13C nuclei is utilized in metabolic imaging of 13C-labeled compounds by imaging specific enzyme kinetics. In this article, imaging strategies mapping physiologic and metabolic aspects in vivo are reviewed within the framework of their application in cancer research, highlighting the potential and challenges of each of them.
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Affiliation(s)
- Yoichi Takakusagi
- Quantum Hyperpolarized MRI Research Team, Institute for Quantum Life Science, Quantum Life and Medical Science Directorate, National Institutes for Quantum Science and Technology, 4-9-1 Anagawa, Inage-Ku, Chiba 263-8555, Japan
- Department of Quantum Life Science, Graduate School of Science, Chiba University, Chiba 265-8522, Japan
- Correspondence: (Y.T.); (K.-i.M.); Tel.: +81-43-382-4297 (Y.T.); +81-43-206-3123 (K.-i.M.)
| | - Ryoma Kobayashi
- Quantum Hyperpolarized MRI Research Team, Institute for Quantum Life Science, Quantum Life and Medical Science Directorate, National Institutes for Quantum Science and Technology, 4-9-1 Anagawa, Inage-Ku, Chiba 263-8555, Japan
| | - Keita Saito
- Quantum Hyperpolarized MRI Research Team, Institute for Quantum Life Science, Quantum Life and Medical Science Directorate, National Institutes for Quantum Science and Technology, 4-9-1 Anagawa, Inage-Ku, Chiba 263-8555, Japan
| | - Shun Kishimoto
- Radiation Biology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892-1002, USA
| | - Murali C. Krishna
- Radiation Biology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892-1002, USA
| | - Ramachandran Murugesan
- Karpaga Vinayaga Institute of Medical Sciences and Research Center, Palayanoor (PO), Chengalpattu 603308, India
| | - Ken-ichiro Matsumoto
- Quantitative RedOx Sensing Group, Department of Radiation Regulatory Science Research, National Institute of Radiological Sciences, Quantum Life and Medical Science Directorate, National Institutes for Quantum Science and Technology, 4-9-1 Anagawa, Inage-Ku, Chiba 263-8555, Japan
- Correspondence: (Y.T.); (K.-i.M.); Tel.: +81-43-382-4297 (Y.T.); +81-43-206-3123 (K.-i.M.)
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2
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Matsumoto KI, Nakanishi I, Zhelev Z, Bakalova R, Aoki I. Nitroxyl Radical as a Theranostic Contrast Agent in Magnetic Resonance Redox Imaging. Antioxid Redox Signal 2022; 36:95-121. [PMID: 34148403 PMCID: PMC8792502 DOI: 10.1089/ars.2021.0110] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Significance:In vivo assessment of paramagnetic and diamagnetic conversions of nitroxyl radicals based on cyclic redox mechanism can be an index of tissue redox status. The redox mechanism of nitroxyl radicals, which enables their use as a normal tissue-selective radioprotector, is seen as being attractive on planning radiation therapy. Recent Advances:In vivo redox imaging using nitroxyl radicals as redox-sensitive contrast agents has been developed to assess tissue redox status. Chemical and biological behaviors depending on chemical structures of nitroxyl radical compounds have been understood in detail. Polymer types of nitroxyl radical contrast agents and/or nitroxyl radical-labeled drugs were designed for approaching theranostics. Critical Issues: Nitroxyl radicals as magnetic resonance imaging (MRI) contrast agents have several advantages compared with those used in electron paramagnetic resonance (EPR) imaging, while support by EPR spectroscopy is important to understand information from MRI. Redox-sensitive paramagnetic contrast agents having a medicinal benefit, that is, nitroxyl-labeled drug, have been developed and proposed. Future Directions: A development of suitable nitroxyl contrast agent for translational theranostic applications with high reaction specificity and low normal tissue toxicity is under progress. Nitroxyl radicals as redox-sensitive magnetic resonance contrast agents can be a useful tool to detect an abnormal tissue redox status such as disordered oxidative stress. Antioxid. Redox Signal. 36, 95-121.
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Affiliation(s)
- Ken-Ichiro Matsumoto
- Quantitative RedOx Sensing Group, Department of Radiation Regulatory Science Research, National Institute of Radiological Sciences, Quantum Life and Medical Science Directorate, National Institutes for Quantum and Radiological Science and Technology, Chiba-shi, Japan
| | - Ikuo Nakanishi
- Quantum RedOx Chemistry Group, Institute for Quantum Life Science, Quantum Life and Medical Science Directorate, National Institutes for Quantum and Radiological Science and Technology, Chiba-shi, Japan
| | - Zhivko Zhelev
- Medical Faculty, Trakia University, Stara Zagora, Bulgaria.,Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Rumiana Bakalova
- Functional and Molecular Imaging Goup, Department of Molecular Imaging and Theranostics, Institute for Quantum Medical Science, Quantum Life and Medical Science Directorate, National Institutes for Quantum and Radiological Science and Technology, Chiba-shi, Japan
| | - Ichio Aoki
- Functional and Molecular Imaging Goup, Department of Molecular Imaging and Theranostics, Institute for Quantum Medical Science, Quantum Life and Medical Science Directorate, National Institutes for Quantum and Radiological Science and Technology, Chiba-shi, Japan
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Saito K, Okazaki S, Tachibana Y, Anzai K, Ozawa T, Takeshita K. In vivo ESR imaging of redox status in mice after X-ray irradiation, measured by acyl-protected hydroxylamine probe, ACP. Free Radic Biol Med 2020; 160:596-603. [PMID: 32891759 DOI: 10.1016/j.freeradbiomed.2020.08.028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Revised: 08/27/2020] [Accepted: 08/30/2020] [Indexed: 11/30/2022]
Abstract
More detailed investigations on the in vivo redox status are needed to elucidate the mechanisms contributing to damage caused by ionizing radiation. In the present study, the in vivo redox status of mice was examined using in vivo electron spin resonance (ESR) imaging after an intraperitoneal injection of 1-acetoxy-3-carbamoyl-2,2,5,5-tetramethylpyrrolidine (ACP) as a probe. ACP is easily hydrolyzed to its hydroxylamine form in the mouse body, and the interconversion between hydroxylamine and the corresponding nitroxyl radical reflects the biological redox status. Liver damage, based on changes in liver weight and plasma aspartate aminotransferase levels, was detected in mice 4 days after X-ray irradiation at 7.5 Gy. ESR imaging showed that the signal intensity of the nitroxyl radical was high at the liver area in both damaged and healthy mice after administration of ACP. Whereas the signal decayed at the liver area for healthy mouse, the decay was negligible in damaged mice. Unlike healthy mouse, signal in the chest for damaged mouse increased with time. The distribution of the sum of hydroxylamine and the nitroxyl radical was similar in damaged and healthy mice. X-ray irradiation slightly lowered the reduction activity of the liver microsomal fraction for the nitroxyl radical. Thiobarbituric acid reactive substances in the liver were higher in damaged mice than in healthy mice; however, no significant differences were noted in reduced glutathione. The present results indicate that the redox status of mice exposed to X-ray irradiation is more oxidative than that in healthy mice.
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Affiliation(s)
- Keita Saito
- National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba, 263-8555, Japan
| | - Shoko Okazaki
- Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Kumamoto, 860-0082, Japan
| | - Yoko Tachibana
- Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Kumamoto, 860-0082, Japan
| | - Kazunori Anzai
- National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba, 263-8555, Japan; Nihon Pharmaceutical University, 10281 Komuro, Ina-machi, Kita-Adachi-gun, Saitama, 362-0806, Japan
| | - Toshihiko Ozawa
- National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba, 263-8555, Japan; Nihon Pharmaceutical University, 10281 Komuro, Ina-machi, Kita-Adachi-gun, Saitama, 362-0806, Japan
| | - Keizo Takeshita
- National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba, 263-8555, Japan; Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Kumamoto, 860-0082, Japan.
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Peng WK, Chen L, Boehm BO, Han J, Loh TP. Molecular phenotyping of oxidative stress in diabetes mellitus with point-of-care NMR system. NPJ Aging Mech Dis 2020; 6:11. [PMID: 33083002 PMCID: PMC7536436 DOI: 10.1038/s41514-020-00049-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Accepted: 09/09/2020] [Indexed: 12/18/2022] Open
Abstract
Diabetes mellitus is one of the fastest-growing health burdens globally. Oxidative stress, which has been implicated in the pathogenesis of diabetes complication (e.g., cardiovascular event), remains poorly understood. We report a new approach to rapidly manipulate and evaluate the redox states of blood using a point-of-care NMR system. Various redox states of the hemoglobin were mapped out using the newly proposed (pseudo) two-dimensional map known as T1-T2 magnetic state diagram. We exploit the fact that oxidative stress changes the subtle molecular motion of water proton in the blood, and thus inducing a measurable shift in magnetic resonance relaxation properties. We demonstrated the clinical utilities of this technique to rapidly stratify diabetes subjects based on their oxidative status in conjunction to the traditional glycemic level to improve the patient stratification and thus the overall outcome of clinical diabetes care and management.
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Affiliation(s)
- Weng Kung Peng
- Precision Medicine–Engineering Group, International Iberian Nanotechnology Laboratory, Braga, Portugal
- BioSystems & Micromechanics IRG (BioSyM), Singapore-MIT Alliance for Research and Technology (SMART) Centre, Singapore, Singapore
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, Singapore
| | - Lan Chen
- BioSystems & Micromechanics IRG (BioSyM), Singapore-MIT Alliance for Research and Technology (SMART) Centre, Singapore, Singapore
| | - Bernhard O. Boehm
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, Singapore
- Ulm University Medical Centre, Department of Internal Medicine 1, Ulm University, Ulm, Germany
- Imperial College London, London, UK
| | - Jongyoon Han
- BioSystems & Micromechanics IRG (BioSyM), Singapore-MIT Alliance for Research and Technology (SMART) Centre, Singapore, Singapore
- Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, 36-841, 77 Massachusetts Avenue, Cambridge, MA 02139 USA
- Department of Biological Engineering, Massachusetts Institute of Technology, 36-841, 77 Massachusetts Avenue, Cambridge, MA 02139 USA
| | - Tze Ping Loh
- Department of Laboratory Medicine, National University Hospital, 5 Lower Kent Ridge Road, Singapore, 119074 Singapore
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Takeshita K, Okazaki H, Tsukamoto M, Okazaki S. Differences in pharmacokinetic behaviors of two lipophilic 3-substituted 2,2,5,5-tetramethylpyrrolidine-N-oxyl radicals, in vivo probes to assess the redox status in the brain using magnetic resonance techniques. Magn Reson Med 2020; 85:560-569. [PMID: 32905631 DOI: 10.1002/mrm.28499] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 07/29/2020] [Accepted: 08/05/2020] [Indexed: 12/15/2022]
Abstract
PURPOSE The pharmacokinetics of 3-methoxycarbonyl- and 3-hydroxymethyl-2,2,5,5-tetramethylpyrrolidine-N-oxyl radicals (MCP and HMP, respectively), magnetic resonance probes to assess the brain redox status, were examined in healthy mouse brains. METHODS The time course of the concentration of the radical form of the probe in the brain was examined by signal enhancements on T1 -weighted MR image after an intravenous injection. The distribution of the total probe (sum of radical and reduced forms) was investigated using brain homogenates. RESULTS MCP distributed to the brain more than HMP. MCP exhibited biphasic decay with fast and slow components, whereas HMP exhibited monophasic decay with a similar rate constant to the slow component of MCP. Similar profiles were observed in various regions of the brain. The total probe for MCP exhibited monophasic decay at a similar rate constant to the slow component of the radical form; however, the initial content of the total probe was similar to its radical form. For HMP, decay of the total probe coincided with that of the radical form. CONCLUSION The decay of MCP needs to consider the reduction of the probe in and its elimination from the brain, while the decay of HMP may mainly result from its elimination from the brain.
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Affiliation(s)
- Keizo Takeshita
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Sojo University, Kumamoto, Japan.,DDS Research Institute, Sojo University, Kumamoto, Japan
| | - Hana Okazaki
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Sojo University, Kumamoto, Japan
| | - Megumi Tsukamoto
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Sojo University, Kumamoto, Japan
| | - Shoko Okazaki
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Sojo University, Kumamoto, Japan
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Sun HJ, Lee WT, Leng B, Wu ZY, Yang Y, Bian JS. Nitroxyl as a Potential Theranostic in the Cancer Arena. Antioxid Redox Signal 2020; 32:331-349. [PMID: 31617376 DOI: 10.1089/ars.2019.7904] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Significance: As one-electron reduced molecule of nitric oxide (NO), nitroxyl (HNO) has gained enormous attention because of its novel physiological or pharmacological properties, ranging from cardiovascular protective actions to antitumoricidal effects. Recent Advances: HNO is emerging as a new entity with therapeutic advantages over its redox sibling, NO. The interests in the chemical, pharmacological, and biological characteristics of HNO have broadened our current understanding of its role in physiology and pathophysiology. Critical Issues: In particular, the experimental evidence suggests the therapeutic potential of HNO in tumor pharmacology, such as neuroblastoma, gastrointestinal tumor, ovarian, lung, and breast cancers. Indeed, HNO donors have been demonstrated to attenuate tumor proliferation and angiogenesis. Future Directions: In this review, the generation and detection of HNO are outlined, and the roles of HNO in cancer progression are further discussed. We anticipate that the completion of this review might give novel insights into the roles of HNO in cancer pharmacology and open up a novel field of cancer therapy based on HNO.
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Affiliation(s)
- Hai-Jian Sun
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Wei-Thye Lee
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Bin Leng
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Zhi-Yuan Wu
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Yong Yang
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Drug Discovery for Metabolic Disease, Center for New Drug Safety Evaluation and Research, China Pharmaceutical University, Nanjing, China
| | - Jin-Song Bian
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.,National University of Singapore (Suzhou) Research Institute, Suzhou, China
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Buchanan LA, Rinard GA, Quine RW, Eaton SS, Eaton GR. Tabletop 700 MHz electron paramagnetic resonance imaging spectrometer. CONCEPTS IN MAGNETIC RESONANCE. PART B, MAGNETIC RESONANCE ENGINEERING 2018; 48B:e21384. [PMID: 30804714 PMCID: PMC6386469 DOI: 10.1002/cmr.b.21384] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Accepted: 08/11/2018] [Indexed: 06/05/2023]
Abstract
Low frequency electron paramagnetic resonance imaging is a powerful tool to non-invasively measure the physiological status of tumors. Here, we report on the design and functionality of a rapid scan and pulse table-top imaging spectrometer based around an arbitrary waveform generator and 25mm cross-loop resonator operating at 700 MHz. Two and four-dimensional rapid scan spectral-spatial images are presented. This table-top imager is a prototype for future pre-clinical imagers.
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Affiliation(s)
- Laura A. Buchanan
- Department of Chemistry and Biochemistry and Center for EPR Imaging of In Vivo Physiology, University of
Denver, Denver, CO 80210
| | - George A. Rinard
- School of Engineering and Computer Science and Center for EPR Imaging of In Vivo Physiology, University of
Denver, Denver, CO 80210
| | - Richard W. Quine
- School of Engineering and Computer Science and Center for EPR Imaging of In Vivo Physiology, University of
Denver, Denver, CO 80210
| | - Sandra S. Eaton
- Department of Chemistry and Biochemistry and Center for EPR Imaging of In Vivo Physiology, University of
Denver, Denver, CO 80210
| | - Gareth R. Eaton
- Department of Chemistry and Biochemistry and Center for EPR Imaging of In Vivo Physiology, University of
Denver, Denver, CO 80210
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Egea J, Fabregat I, Frapart YM, Ghezzi P, Görlach A, Kietzmann T, Kubaichuk K, Knaus UG, Lopez MG, Olaso-Gonzalez G, Petry A, Schulz R, Vina J, Winyard P, Abbas K, Ademowo OS, Afonso CB, Andreadou I, Antelmann H, Antunes F, Aslan M, Bachschmid MM, Barbosa RM, Belousov V, Berndt C, Bernlohr D, Bertrán E, Bindoli A, Bottari SP, Brito PM, Carrara G, Casas AI, Chatzi A, Chondrogianni N, Conrad M, Cooke MS, Costa JG, Cuadrado A, My-Chan Dang P, De Smet B, Debelec-Butuner B, Dias IHK, Dunn JD, Edson AJ, El Assar M, El-Benna J, Ferdinandy P, Fernandes AS, Fladmark KE, Förstermann U, Giniatullin R, Giricz Z, Görbe A, Griffiths H, Hampl V, Hanf A, Herget J, Hernansanz-Agustín P, Hillion M, Huang J, Ilikay S, Jansen-Dürr P, Jaquet V, Joles JA, Kalyanaraman B, Kaminskyy D, Karbaschi M, Kleanthous M, Klotz LO, Korac B, Korkmaz KS, Koziel R, Kračun D, Krause KH, Křen V, Krieg T, Laranjinha J, Lazou A, Li H, Martínez-Ruiz A, Matsui R, McBean GJ, Meredith SP, Messens J, Miguel V, Mikhed Y, Milisav I, Milković L, Miranda-Vizuete A, Mojović M, Monsalve M, Mouthuy PA, Mulvey J, Münzel T, Muzykantov V, Nguyen ITN, Oelze M, Oliveira NG, Palmeira CM, Papaevgeniou N, Pavićević A, Pedre B, Peyrot F, Phylactides M, Pircalabioru GG, Pitt AR, Poulsen HE, Prieto I, Rigobello MP, Robledinos-Antón N, Rodríguez-Mañas L, Rolo AP, Rousset F, Ruskovska T, Saraiva N, Sasson S, Schröder K, Semen K, Seredenina T, Shakirzyanova A, Smith GL, Soldati T, Sousa BC, Spickett CM, Stancic A, Stasia MJ, Steinbrenner H, Stepanić V, Steven S, Tokatlidis K, Tuncay E, Turan B, Ursini F, Vacek J, Vajnerova O, Valentová K, Van Breusegem F, Varisli L, Veal EA, Yalçın AS, Yelisyeyeva O, Žarković N, Zatloukalová M, Zielonka J, Touyz RM, Papapetropoulos A, Grune T, Lamas S, Schmidt HHHW, Di Lisa F, Daiber A. European contribution to the study of ROS: A summary of the findings and prospects for the future from the COST action BM1203 (EU-ROS). Redox Biol 2017; 13:94-162. [PMID: 28577489 PMCID: PMC5458069 DOI: 10.1016/j.redox.2017.05.007] [Citation(s) in RCA: 202] [Impact Index Per Article: 28.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Accepted: 05/08/2017] [Indexed: 12/12/2022] Open
Abstract
The European Cooperation in Science and Technology (COST) provides an ideal framework to establish multi-disciplinary research networks. COST Action BM1203 (EU-ROS) represents a consortium of researchers from different disciplines who are dedicated to providing new insights and tools for better understanding redox biology and medicine and, in the long run, to finding new therapeutic strategies to target dysregulated redox processes in various diseases. This report highlights the major achievements of EU-ROS as well as research updates and new perspectives arising from its members. The EU-ROS consortium comprised more than 140 active members who worked together for four years on the topics briefly described below. The formation of reactive oxygen and nitrogen species (RONS) is an established hallmark of our aerobic environment and metabolism but RONS also act as messengers via redox regulation of essential cellular processes. The fact that many diseases have been found to be associated with oxidative stress established the theory of oxidative stress as a trigger of diseases that can be corrected by antioxidant therapy. However, while experimental studies support this thesis, clinical studies still generate controversial results, due to complex pathophysiology of oxidative stress in humans. For future improvement of antioxidant therapy and better understanding of redox-associated disease progression detailed knowledge on the sources and targets of RONS formation and discrimination of their detrimental or beneficial roles is required. In order to advance this important area of biology and medicine, highly synergistic approaches combining a variety of diverse and contrasting disciplines are needed.
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Affiliation(s)
- Javier Egea
- Institute Teofilo Hernando, Department of Pharmacology, School of Medicine. Univerisdad Autonoma de Madrid, Spain
| | - Isabel Fabregat
- Bellvitge Biomedical Research Institute (IDIBELL) and University of Barcelona (UB), L'Hospitalet, Barcelona, Spain
| | - Yves M Frapart
- LCBPT, UMR 8601 CNRS - Paris Descartes University, Sorbonne Paris Cité, Paris, France
| | | | - Agnes Görlach
- Experimental and Molecular Pediatric Cardiology, German Heart Center Munich at the Technical University Munich, Munich, Germany; DZHK (German Centre for Cardiovascular Research), partner site Munich Heart Alliance, Munich, Germany
| | - Thomas Kietzmann
- Faculty of Biochemistry and Molecular Medicine, and Biocenter Oulu, University of Oulu, Oulu, Finland
| | - Kateryna Kubaichuk
- Faculty of Biochemistry and Molecular Medicine, and Biocenter Oulu, University of Oulu, Oulu, Finland
| | - Ulla G Knaus
- Conway Institute, School of Medicine, University College Dublin, Dublin, Ireland
| | - Manuela G Lopez
- Institute Teofilo Hernando, Department of Pharmacology, School of Medicine. Univerisdad Autonoma de Madrid, Spain
| | | | - Andreas Petry
- Experimental and Molecular Pediatric Cardiology, German Heart Center Munich at the Technical University Munich, Munich, Germany
| | - Rainer Schulz
- Institute of Physiology, JLU Giessen, Giessen, Germany
| | - Jose Vina
- Department of Physiology, University of Valencia, Spain
| | - Paul Winyard
- University of Exeter Medical School, St Luke's Campus, Exeter EX1 2LU, UK
| | - Kahina Abbas
- LCBPT, UMR 8601 CNRS - Paris Descartes University, Sorbonne Paris Cité, Paris, France
| | - Opeyemi S Ademowo
- Life & Health Sciences and Aston Research Centre for Healthy Ageing, Aston University, Aston Triangle, Birmingham B4 7ET, UK
| | - Catarina B Afonso
- School of Life & Health Sciences, Aston University, Aston Triangle, Birmingham B47ET, UK
| | - Ioanna Andreadou
- Laboratory of Pharmacology, Faculty of Pharmacy, National and Kapodistrian University of Athens, Greece
| | - Haike Antelmann
- Institute for Biology-Microbiology, Freie Universität Berlin, Berlin, Germany
| | - Fernando Antunes
- Departamento de Química e Bioquímica and Centro de Química e Bioquímica, Faculdade de Ciências, Portugal
| | - Mutay Aslan
- Department of Medical Biochemistry, Faculty of Medicine, Akdeniz University, Antalya, Turkey
| | - Markus M Bachschmid
- Vascular Biology Section & Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, MA, USA
| | - Rui M Barbosa
- Center for Neurosciences and Cell Biology, University of Coimbra and Faculty of Pharmacy, University of Coimbra, Coimbra, Portugal
| | - Vsevolod Belousov
- Molecular technologies laboratory, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Miklukho-Maklaya 16/10, Moscow 117997, Russia
| | - Carsten Berndt
- Department of Neurology, Medical Faculty, Heinrich-Heine University, Düsseldorf, Germany
| | - David Bernlohr
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota - Twin Cities, USA
| | - Esther Bertrán
- Bellvitge Biomedical Research Institute (IDIBELL) and University of Barcelona (UB), L'Hospitalet, Barcelona, Spain
| | | | - Serge P Bottari
- GETI, Institute for Advanced Biosciences, INSERM U1029, CNRS UMR 5309, Grenoble-Alpes University and Radio-analysis Laboratory, CHU de Grenoble, Grenoble, France
| | - Paula M Brito
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Lisboa, Portugal; Faculdade de Ciências da Saúde, Universidade da Beira Interior, Covilhã, Portugal
| | - Guia Carrara
- Department of Pathology, University of Cambridge, Cambridge, UK
| | - Ana I Casas
- Department of Pharmacology & Personalized Medicine, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, The Netherlands
| | - Afroditi Chatzi
- Institute of Molecular Cell and Systems Biology, College of Medical Veterinary and Life Sciences, University of Glasgow, University Avenue, Glasgow, UK
| | - Niki Chondrogianni
- National Hellenic Research Foundation, Institute of Biology, Medicinal Chemistry and Biotechnology, 48 Vas. Constantinou Ave., 116 35 Athens, Greece
| | - Marcus Conrad
- Helmholtz Center Munich, Institute of Developmental Genetics, Neuherberg, Germany
| | - Marcus S Cooke
- Oxidative Stress Group, Dept. Environmental & Occupational Health, Florida International University, Miami, FL 33199, USA
| | - João G Costa
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Lisboa, Portugal; CBIOS, Universidade Lusófona Research Center for Biosciences & Health Technologies, Lisboa, Portugal
| | - Antonio Cuadrado
- Instituto de Investigaciones Biomédicas "Alberto Sols" UAM-CSIC, Instituto de Investigación Sanitaria La Paz (IdiPaz), Department of Biochemistry, Faculty of Medicine, Autonomous University of Madrid. Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - Pham My-Chan Dang
- Université Paris Diderot, Sorbonne Paris Cité, INSERM-U1149, CNRS-ERL8252, Centre de Recherche sur l'Inflammation, Laboratoire d'Excellence Inflamex, Faculté de Médecine Xavier Bichat, Paris, France
| | - Barbara De Smet
- Department of Plant Systems Biology, VIB, 9052 Ghent, Belgium; Structural Biology Research Center, VIB, 1050 Brussels, Belgium; Department of Biomedical Sciences and CNR Institute of Neuroscience, University of Padova, Padova, Italy; Pharmahungary Group, Szeged, Hungary
| | - Bilge Debelec-Butuner
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Ege University, Bornova, Izmir 35100, Turkey
| | - Irundika H K Dias
- Life & Health Sciences and Aston Research Centre for Healthy Ageing, Aston University, Aston Triangle, Birmingham B4 7ET, UK
| | - Joe Dan Dunn
- Department of Biochemistry, Science II, University of Geneva, 30 quai Ernest-Ansermet, 1211 Geneva-4, Switzerland
| | - Amanda J Edson
- Department of Molecular Biology, University of Bergen, Bergen, Norway
| | - Mariam El Assar
- Fundación para la Investigación Biomédica del Hospital Universitario de Getafe, Getafe, Spain
| | - Jamel El-Benna
- Université Paris Diderot, Sorbonne Paris Cité, INSERM-U1149, CNRS-ERL8252, Centre de Recherche sur l'Inflammation, Laboratoire d'Excellence Inflamex, Faculté de Médecine Xavier Bichat, Paris, France
| | - Péter Ferdinandy
- Department of Pharmacology and Pharmacotherapy, Medical Faculty, Semmelweis University, Budapest, Hungary; Pharmahungary Group, Szeged, Hungary
| | - Ana S Fernandes
- CBIOS, Universidade Lusófona Research Center for Biosciences & Health Technologies, Lisboa, Portugal
| | - Kari E Fladmark
- Department of Molecular Biology, University of Bergen, Bergen, Norway
| | - Ulrich Förstermann
- Department of Pharmacology, Johannes Gutenberg University Medical Center, Mainz, Germany
| | - Rashid Giniatullin
- A.I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, Kuopio, Finland
| | - Zoltán Giricz
- Department of Pharmacology and Pharmacotherapy, Medical Faculty, Semmelweis University, Budapest, Hungary; Pharmahungary Group, Szeged, Hungary
| | - Anikó Görbe
- Department of Pharmacology and Pharmacotherapy, Medical Faculty, Semmelweis University, Budapest, Hungary; Pharmahungary Group, Szeged, Hungary
| | - Helen Griffiths
- Life & Health Sciences and Aston Research Centre for Healthy Ageing, Aston University, Aston Triangle, Birmingham B4 7ET, UK; Faculty of Health and Medical Sciences, University of Surrey, Guildford GU2 7XH, UK
| | - Vaclav Hampl
- Department of Physiology, 2nd Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Alina Hanf
- Molecular Cardiology, Center for Cardiology, Cardiology 1, University Medical Center Mainz, Mainz, Germany
| | - Jan Herget
- Department of Physiology, 2nd Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Pablo Hernansanz-Agustín
- Servicio de Immunología, Hospital Universitario de La Princesa, Instituto de Investigación Sanitaria Princesa (IIS-IP), Madrid, Spain; Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de Madrid (UAM) and Instituto de Investigaciones Biomédicas Alberto Sols, Madrid, Spain
| | - Melanie Hillion
- Institute for Biology-Microbiology, Freie Universität Berlin, Berlin, Germany
| | - Jingjing Huang
- Department of Plant Systems Biology, VIB, 9052 Ghent, Belgium; Structural Biology Research Center, VIB, 1050 Brussels, Belgium; Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium; Brussels Center for Redox Biology, Structural Biology Brussels, Vrije Universiteit Brussel, 1050 Brussels, Belgium
| | - Serap Ilikay
- Harran University, Arts and Science Faculty, Department of Biology, Cancer Biology Lab, Osmanbey Campus, Sanliurfa, Turkey
| | - Pidder Jansen-Dürr
- Institute for Biomedical Aging Research, University of Innsbruck, Innsbruck, Austria
| | - Vincent Jaquet
- Dept. of Pathology and Immunology, Centre Médical Universitaire, Geneva, Switzerland
| | - Jaap A Joles
- Department of Nephrology & Hypertension, University Medical Center Utrecht, The Netherlands
| | | | | | - Mahsa Karbaschi
- Oxidative Stress Group, Dept. Environmental & Occupational Health, Florida International University, Miami, FL 33199, USA
| | - Marina Kleanthous
- Molecular Genetics Thalassaemia Department, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
| | - Lars-Oliver Klotz
- Institute of Nutrition, Department of Nutrigenomics, Friedrich Schiller University, Jena, Germany
| | - Bato Korac
- University of Belgrade, Institute for Biological Research "Sinisa Stankovic" and Faculty of Biology, Belgrade, Serbia
| | - Kemal Sami Korkmaz
- Department of Bioengineering, Cancer Biology Laboratory, Faculty of Engineering, Ege University, Bornova, 35100 Izmir, Turkey
| | - Rafal Koziel
- Institute for Biomedical Aging Research, University of Innsbruck, Innsbruck, Austria
| | - Damir Kračun
- Experimental and Molecular Pediatric Cardiology, German Heart Center Munich at the Technical University Munich, Munich, Germany
| | - Karl-Heinz Krause
- Dept. of Pathology and Immunology, Centre Médical Universitaire, Geneva, Switzerland
| | - Vladimír Křen
- Institute of Microbiology, Laboratory of Biotransformation, Czech Academy of Sciences, Videnska 1083, CZ-142 20 Prague, Czech Republic
| | - Thomas Krieg
- Department of Medicine, University of Cambridge, UK
| | - João Laranjinha
- Center for Neurosciences and Cell Biology, University of Coimbra and Faculty of Pharmacy, University of Coimbra, Coimbra, Portugal
| | - Antigone Lazou
- School of Biology, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| | - Huige Li
- Department of Pharmacology, Johannes Gutenberg University Medical Center, Mainz, Germany
| | - Antonio Martínez-Ruiz
- Servicio de Immunología, Hospital Universitario de La Princesa, Instituto de Investigación Sanitaria Princesa (IIS-IP), Madrid, Spain; Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain
| | - Reiko Matsui
- Vascular Biology Section & Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, MA, USA
| | - Gethin J McBean
- School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin, Dublin, Ireland
| | - Stuart P Meredith
- School of Life & Health Sciences, Aston University, Aston Triangle, Birmingham B47ET, UK
| | - Joris Messens
- Structural Biology Research Center, VIB, 1050 Brussels, Belgium; Brussels Center for Redox Biology, Structural Biology Brussels, Vrije Universiteit Brussel, 1050 Brussels, Belgium
| | - Verónica Miguel
- Centro de Biología Molecular "Severo Ochoa" (CSIC-UAM), Madrid, Spain
| | - Yuliya Mikhed
- Molecular Cardiology, Center for Cardiology, Cardiology 1, University Medical Center Mainz, Mainz, Germany
| | - Irina Milisav
- University of Ljubljana, Faculty of Medicine, Institute of Pathophysiology and Faculty of Health Sciences, Ljubljana, Slovenia
| | - Lidija Milković
- Ruđer Bošković Institute, Division of Molecular Medicine, Zagreb, Croatia
| | - Antonio Miranda-Vizuete
- Instituto de Biomedicina de Sevilla, Hospital Universitario Virgen del Rocío/CSIC/Universidad de Sevilla, Sevilla, Spain
| | - Miloš Mojović
- University of Belgrade, Faculty of Physical Chemistry, Studentski trg 12-16, 11000 Belgrade, Serbia
| | - María Monsalve
- Instituto de Investigaciones Biomédicas "Alberto Sols" (CSIC-UAM), Madrid, Spain
| | - Pierre-Alexis Mouthuy
- Laboratory for Oxidative Stress, Rudjer Boskovic Institute, Bijenicka 54, 10000 Zagreb, Croatia
| | - John Mulvey
- Department of Medicine, University of Cambridge, UK
| | - Thomas Münzel
- Molecular Cardiology, Center for Cardiology, Cardiology 1, University Medical Center Mainz, Mainz, Germany
| | - Vladimir Muzykantov
- Department of Pharmacology, Center for Targeted Therapeutics & Translational Nanomedicine, ITMAT/CTSA Translational Research Center University of Pennsylvania The Perelman School of Medicine, Philadelphia, PA, USA
| | - Isabel T N Nguyen
- Department of Nephrology & Hypertension, University Medical Center Utrecht, The Netherlands
| | - Matthias Oelze
- Molecular Cardiology, Center for Cardiology, Cardiology 1, University Medical Center Mainz, Mainz, Germany
| | - Nuno G Oliveira
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Lisboa, Portugal
| | - Carlos M Palmeira
- Center for Neurosciences & Cell Biology of the University of Coimbra, Coimbra, Portugal; Department of Life Sciences of the Faculty of Sciences & Technology of the University of Coimbra, Coimbra, Portugal
| | - Nikoletta Papaevgeniou
- National Hellenic Research Foundation, Institute of Biology, Medicinal Chemistry and Biotechnology, 48 Vas. Constantinou Ave., 116 35 Athens, Greece
| | - Aleksandra Pavićević
- University of Belgrade, Faculty of Physical Chemistry, Studentski trg 12-16, 11000 Belgrade, Serbia
| | - Brandán Pedre
- Structural Biology Research Center, VIB, 1050 Brussels, Belgium; Brussels Center for Redox Biology, Structural Biology Brussels, Vrije Universiteit Brussel, 1050 Brussels, Belgium
| | - Fabienne Peyrot
- LCBPT, UMR 8601 CNRS - Paris Descartes University, Sorbonne Paris Cité, Paris, France; ESPE of Paris, Paris Sorbonne University, Paris, France
| | - Marios Phylactides
- Molecular Genetics Thalassaemia Department, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
| | | | - Andrew R Pitt
- School of Life & Health Sciences, Aston University, Aston Triangle, Birmingham B47ET, UK
| | - Henrik E Poulsen
- Laboratory of Clinical Pharmacology, Rigshospitalet, University Hospital Copenhagen, Denmark; Department of Clinical Pharmacology, Bispebjerg Frederiksberg Hospital, University Hospital Copenhagen, Denmark; Department Q7642, Rigshospitalet, Blegdamsvej 9, DK-2100 Copenhagen, Denmark
| | - Ignacio Prieto
- Instituto de Investigaciones Biomédicas "Alberto Sols" (CSIC-UAM), Madrid, Spain
| | - Maria Pia Rigobello
- Department of Biomedical Sciences, University of Padova, via Ugo Bassi 58/b, 35131 Padova, Italy
| | - Natalia Robledinos-Antón
- Instituto de Investigaciones Biomédicas "Alberto Sols" UAM-CSIC, Instituto de Investigación Sanitaria La Paz (IdiPaz), Department of Biochemistry, Faculty of Medicine, Autonomous University of Madrid. Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - Leocadio Rodríguez-Mañas
- Fundación para la Investigación Biomédica del Hospital Universitario de Getafe, Getafe, Spain; Servicio de Geriatría, Hospital Universitario de Getafe, Getafe, Spain
| | - Anabela P Rolo
- Center for Neurosciences & Cell Biology of the University of Coimbra, Coimbra, Portugal; Department of Life Sciences of the Faculty of Sciences & Technology of the University of Coimbra, Coimbra, Portugal
| | - Francis Rousset
- Dept. of Pathology and Immunology, Centre Médical Universitaire, Geneva, Switzerland
| | - Tatjana Ruskovska
- Faculty of Medical Sciences, Goce Delcev University, Stip, Republic of Macedonia
| | - Nuno Saraiva
- CBIOS, Universidade Lusófona Research Center for Biosciences & Health Technologies, Lisboa, Portugal
| | - Shlomo Sasson
- Institute for Drug Research, Section of Pharmacology, Diabetes Research Unit, The Hebrew University Faculty of Medicine, Jerusalem, Israel
| | - Katrin Schröder
- Institute for Cardiovascular Physiology, Goethe-University, Frankfurt, Germany; DZHK (German Centre for Cardiovascular Research), partner site Rhine-Main, Mainz, Germany
| | - Khrystyna Semen
- Danylo Halytsky Lviv National Medical University, Lviv, Ukraine
| | - Tamara Seredenina
- Dept. of Pathology and Immunology, Centre Médical Universitaire, Geneva, Switzerland
| | - Anastasia Shakirzyanova
- A.I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, Kuopio, Finland
| | | | - Thierry Soldati
- Department of Biochemistry, Science II, University of Geneva, 30 quai Ernest-Ansermet, 1211 Geneva-4, Switzerland
| | - Bebiana C Sousa
- School of Life & Health Sciences, Aston University, Aston Triangle, Birmingham B47ET, UK
| | - Corinne M Spickett
- Life & Health Sciences and Aston Research Centre for Healthy Ageing, Aston University, Aston Triangle, Birmingham B4 7ET, UK
| | - Ana Stancic
- University of Belgrade, Institute for Biological Research "Sinisa Stankovic" and Faculty of Biology, Belgrade, Serbia
| | - Marie José Stasia
- Université Grenoble Alpes, CNRS, Grenoble INP, CHU Grenoble Alpes, TIMC-IMAG, F38000 Grenoble, France; CDiReC, Pôle Biologie, CHU de Grenoble, Grenoble, F-38043, France
| | - Holger Steinbrenner
- Institute of Nutrition, Department of Nutrigenomics, Friedrich Schiller University, Jena, Germany
| | - Višnja Stepanić
- Ruđer Bošković Institute, Division of Molecular Medicine, Zagreb, Croatia
| | - Sebastian Steven
- Molecular Cardiology, Center for Cardiology, Cardiology 1, University Medical Center Mainz, Mainz, Germany
| | - Kostas Tokatlidis
- Institute of Molecular Cell and Systems Biology, College of Medical Veterinary and Life Sciences, University of Glasgow, University Avenue, Glasgow, UK
| | - Erkan Tuncay
- Department of Biophysics, Ankara University, Faculty of Medicine, 06100 Ankara, Turkey
| | - Belma Turan
- Department of Biophysics, Ankara University, Faculty of Medicine, 06100 Ankara, Turkey
| | - Fulvio Ursini
- Department of Molecular Medicine, University of Padova, Padova, Italy
| | - Jan Vacek
- Department of Medical Chemistry and Biochemistry, Faculty of Medicine and Dentistry, Palacký University, Hnevotinska 3, Olomouc 77515, Czech Republic
| | - Olga Vajnerova
- Department of Physiology, 2nd Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Kateřina Valentová
- Institute of Microbiology, Laboratory of Biotransformation, Czech Academy of Sciences, Videnska 1083, CZ-142 20 Prague, Czech Republic
| | - Frank Van Breusegem
- Department of Plant Systems Biology, VIB, 9052 Ghent, Belgium; Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium
| | - Lokman Varisli
- Harran University, Arts and Science Faculty, Department of Biology, Cancer Biology Lab, Osmanbey Campus, Sanliurfa, Turkey
| | - Elizabeth A Veal
- Institute for Cell and Molecular Biosciences, and Institute for Ageing, Newcastle University, Framlington Place, Newcastle upon Tyne, UK
| | - A Suha Yalçın
- Department of Biochemistry, School of Medicine, Marmara University, İstanbul, Turkey
| | | | - Neven Žarković
- Laboratory for Oxidative Stress, Rudjer Boskovic Institute, Bijenicka 54, 10000 Zagreb, Croatia
| | - Martina Zatloukalová
- Department of Medical Chemistry and Biochemistry, Faculty of Medicine and Dentistry, Palacký University, Hnevotinska 3, Olomouc 77515, Czech Republic
| | | | - Rhian M Touyz
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, UK
| | - Andreas Papapetropoulos
- Laboratoty of Pharmacology, Faculty of Pharmacy, National and Kapodistrian University of Athens, Greece
| | - Tilman Grune
- German Institute of Human Nutrition, Department of Toxicology, Arthur-Scheunert-Allee 114-116, 14558 Nuthetal, Germany
| | - Santiago Lamas
- Centro de Biología Molecular "Severo Ochoa" (CSIC-UAM), Madrid, Spain
| | - Harald H H W Schmidt
- Department of Pharmacology & Personalized Medicine, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, The Netherlands
| | - Fabio Di Lisa
- Department of Biomedical Sciences and CNR Institute of Neuroscience, University of Padova, Padova, Italy.
| | - Andreas Daiber
- Molecular Cardiology, Center for Cardiology, Cardiology 1, University Medical Center Mainz, Mainz, Germany; DZHK (German Centre for Cardiovascular Research), partner site Rhine-Main, Mainz, Germany.
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Takeshita K, Okazaki S, Shinada K, Shibamoto Y. Application of a Compact Magnetic Resonance Imaging System with 1.5 T Permanent Magnets to Visualize Release from and the Disintegration of Capsule Formulations in Vitro and in Vivo. Biol Pharm Bull 2017; 40:1268-1274. [PMID: 28769009 DOI: 10.1248/bpb.b17-00154] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Although magnetic resonance imaging (MRI) has potential in assessments of formulations, few studies have been conducted because of the size and expense of the instrument. In the present study, the processes of in vitro and in vivo release in a gelatin capsule formulation model were visualized using a compact MRI system with 1.5 T permanent magnets, which is more convenient than the superconducting MRI systems typically used for clinical and experimental purposes. A Gd-chelate of diethylenetriamine-N,N,N',N″,N″-pentaacetic acid, a contrast agent that markedly enhances proton signals via close contact with water, was incorporated into capsule formulations as a marker compound. In vitro experiments could clearly demonstrate the preparation-dependent differences in the release/disintegration of the formulations. In some preparations, the penetration of water into the formulation and generation of bubbles in the capsule were also observed prior to the disintegration of the formulation. When capsule formulations were orally administered to rats, the release of the marker into the stomach and its transit to the duodenum were visualized. These results strongly indicate that the compact MRI system is a powerful tool for pharmaceutical studies.
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Affiliation(s)
- Keizo Takeshita
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Sojo University.,DDS Research Institute, Sojo University
| | - Shoko Okazaki
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Sojo University
| | - Kyosuke Shinada
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Sojo University
| | - Yuma Shibamoto
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Sojo University
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10
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David Jebaraj D, Utsumi H, Milton Franklin Benial A. Electron spin resonance studies on deuterated nitroxyl spin probes used in Overhauser-enhanced magnetic resonance imaging. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2017; 55:700-705. [PMID: 28052402 DOI: 10.1002/mrc.4576] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Accepted: 12/30/2016] [Indexed: 06/06/2023]
Abstract
The electron spin resonance studies were carried out for 2 mm concentration of 14 N-labeled and 15 N-labeled 3-carbamoyl-2,2,5,5-tetramethyl-pyrrolidine-1-oxyl, 3-carboxy-2,2,5,5-tetramethyl-pyrrolidine-1-oxyl, 3-methoxycarbonyl-2,2,5,5-tetramethyl-pyrrolidine-1-oxyl and their deuterated nitroxyl radicals using X-band electron spin resonance spectrometer. The electron spin resonance line shape analysis was carried out. The electron spin resonance parameters such as linewidth, Lorentzian component, signal intensity ratio, rotational correlation time, hyperfine coupling constant and g-factor were estimated. The deuterated nitroxyl radicals have narrow linewidth and an increase in Lorentzian component, compared with undeuterated nitroxyl radicals. The dynamic nuclear polarization factor was observed for all nitroxyl radicals. Upon 2 H labeling, about 70% and 40% increase in dynamic nuclear polarization factor were observed for 14 N-labeled and 15 N-labeled nitroxyl radicals, respectively. The signal intensity ratio and g-value indicate the isotropic nature of the nitroxyl radicals in pure water. Therefore, the deuterated nitroxyl radicals are suitable spin probes for in vivo/in vitro electron spin resonance and Overhauser-enhanced magnetic resonance imaging modalities. Copyright © 2017 John Wiley & Sons, Ltd.
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Affiliation(s)
- D David Jebaraj
- Department of Physics, The American College, Madurai, 625 002, Tamilnadu, India
| | - Hideo Utsumi
- Innovation Center for Medical Redox Navigation, Kyushu University, Fukuoka, 812 8582, Japan
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11
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Abstract
Molecular oxygen (O2) is essential to brain function and mechanisms necessary to regulate variations in delivery or utilization of O2 are crucial to support normal brain homeostasis, physiology and energy metabolism. Any imbalance in cerebral tissue partial pressure of O2 (pO2) levels may lead to pathophysiological complications including increased reactive O2 species generation leading to oxidative stress when tissue O2 level is too high or too low. Accordingly, the need for oximetry methods, which assess cerebral pO2in vivo and in real time, is imperative to understand the role of O2 in various metabolic and disease states, including the effects of treatment and therapy options. In this review, we provide a brief overview of the common in vivo oximetry methodologies for measuring cerebral pO2. We discuss the advantages and limitations of oximetry methodologies to measure cerebral pO2in vivo followed by a more in-depth review of electron paramagnetic resonance oximetry spectroscopy and imaging using several examples of current electron paramagnetic resonance oximetry applications in the brain.
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Affiliation(s)
- John M Weaver
- Department of Pharmaceutical Sciences, College of Pharmacy, University of New Mexico Health Sciences Center, Albuquerque, NM, USA.,Center of Biomedical Research Excellence, College of Pharmacy, University of New Mexico Health Sciences Center, Albuquerque, NM, USA
| | - Ke Jian Liu
- Department of Pharmaceutical Sciences, College of Pharmacy, University of New Mexico Health Sciences Center, Albuquerque, NM, USA.,Center of Biomedical Research Excellence, College of Pharmacy, University of New Mexico Health Sciences Center, Albuquerque, NM, USA.,Department of Neurology, University of New Mexico Health Sciences Center, Albuquerque, NM, USA
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12
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Meenakumari V, Utsumi H, Jawahar A, Franklin Benial AM. Concentration dependence of nitroxyl spin probes in liposomal solution: electron spin resonance and overhauser-enhanced magnetic resonance studies. J Liposome Res 2016; 28:87-96. [PMID: 27892752 DOI: 10.1080/08982104.2016.1264960] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
In this work, the detailed studies of electron spin resonance (ESR) and overhauser-enhanced magnetic resonance imaging (OMRI) were carried out for permeable nitroxyl spin probe, MC-PROXYL as a function of agent concentration in liposomal solution. In order to compare the impermeable nature of nitroxyl radical, the study was also carried out only at 2 mM concentration of carboxy-PROXYL. The ESR parameters were estimated using L-band and 300 MHz ESR spectrometers. The line width broadening was measured as a function of agent concentration in liposomal solution. The estimated rotational correlation time is proportional to the agent concentration, which indicates that less mobile nature of nitroxyl spin probe in liposomal solution. The partition parameter and permeability values indicate that the diffusion of nitroxyl spin probe distribution into the lipid phase is maximum at 2 mM concentration of MC-PROXYL. The dynamic nuclear polarization (DNP) parameters such as DNP factor, longitudinal relaxivity, saturation parameter, leakage factor and coupling factor were estimated for 2 mM MC-PROXYL in 400 mM liposomal dispersion. The spin lattice relaxation time was shortened in liposomal solution, which leads to the high relaxivity. Reduction in coupling factor is due to less interaction between the electron and nuclear spins, which causes the reduction in enhancement. The leakage factor increases with increasing agent concentration. The increase in DNP enhancement was significant up to 2 mM in liposomal solution. These results paves the way for choosing optimum agent concentration and OMRI scan parameters used in intra and extra membrane water by loading the liposome vesicles with a lipid permeable nitroxyl spin probes in OMRI experiments.
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Affiliation(s)
- V Meenakumari
- a Department of Physics , NMSSVN College , Madurai , Tamilnadu India
| | - Hideo Utsumi
- b Innovation Center for Medical Redox Navigation, Kyushu University , Fukuoka , Japan , and
| | - A Jawahar
- c Department of Chemistry , NMSSVN College , Madurai , Tamilnadu , India
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13
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Takeshita K, Matsumoto KI. Development of Magnetic Resonance Based Functional Imaging Techniques Heading Up to Theranostics ~Creating Next Generation Functional Contrast Agents~. YAKUGAKU ZASSHI 2016; 136:1073-4. [DOI: 10.1248/yakushi.15-00234-f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Keizo Takeshita
- Laboratory of Analytical Sciences, Faculty of Pharmaceutical Sciences, Sojo University
| | - Ken-ichiro Matsumoto
- Quantitative RedOx Sensing Team, Department of Basic Medical Sciences for Radiation Damages, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology
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14
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Takeshita K, Okazaki S, Hirose Y. Pharmacokinetics of lipophilically different 3-substituted 2,2,5,5-tetramethylpyrrolidine-N-oxyl radicals frequently used as redox probes in in vivo magnetic resonance studies. Free Radic Biol Med 2016; 97:263-273. [PMID: 27302159 DOI: 10.1016/j.freeradbiomed.2016.06.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Revised: 06/09/2016] [Accepted: 06/10/2016] [Indexed: 12/25/2022]
Abstract
3-Carboxy-, 3-carbamoyl-, 3-hydroxymethyl, and 3-methoxycarbonyl-2,2,5,5-tetramethylpyrrolidine-N-oxyl radicals (CxP, CmP, HMP, and MCP, respectively) have been widely used as redox probes in in vivo magnetic resonance studies. Knowledge of the pharmacokinetics of these probes is essential for redox analyses. The apparent partition coefficient (Kp) of these probes at neutral pH was in the order of MCP>HMP>CmP>CxP. After these probes had been injected intravenously, their blood levels decayed in a bi-phasic manner, namely, fast decay followed by slow decay. The order of the area under the curve (AUC) was CxP»HMP>MCP≥CmP, which roughly coincided with that of Kp in the opposite direction, except for CmP. Decay in the slow phase largely affected the AUC of these probes. The reduction of these probes contributed to their decay in the slow phase. A two-compartment model analysis of blood levels, cyclic voltammetry, and magnetic resonance imaging provided the following pharmacokinetic information. The distribution of the probes between the central and peripheral compartments rapidly reached an equilibrium. In addition to lipophilicity, reduction potential may also be involved in the rate of in vivo reduction of the probes. Hydrophilic probes, such as CxP and CmP, were predominantly excreted in the urine. MCP was distributed to the peripheral tissues and then rapidly reduced. HMP was unique due to its moderate lipophilicity and slower reduction. Among the probes examined, the liver and kidney appear to be included in the central compartment in the two-compartment model analysis. MCP and HMP were rapidly distributed to the brain.
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Affiliation(s)
- Keizo Takeshita
- Faculty of Pharmaceutical Sciences, Sojo University, Kumamoto 860-0082, Japan.
| | - Shoko Okazaki
- Faculty of Pharmaceutical Sciences, Sojo University, Kumamoto 860-0082, Japan
| | - Yuriko Hirose
- Faculty of Pharmaceutical Sciences, Sojo University, Kumamoto 860-0082, Japan
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Habel J, Ogbonna A, Larsen N, Cherré S, Kynde S, Midtgaard SR, Kinoshita K, Krabbe S, Jensen GV, Hansen JS, Almdal K, Hèlix-Nielsen C. Selecting analytical tools for characterization of polymersomes in aqueous solution. RSC Adv 2015. [DOI: 10.1039/c5ra16403f] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
We present 17 techniques to analyze polymersomes, in terms of their size, bilayer properties, elastic properties or surface charge.
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Affiliation(s)
- Joachim Habel
- Technical University of Denmark
- Department of Environmental Engineering
- 2800 Kgs. Lyngby
- Denmark
- Aquaporin A/S
| | | | - Nanna Larsen
- University of Copenhagen
- Copenhagen Biocenter
- 2200 Copenhagen
- Denmark
| | - Solène Cherré
- Technical University of Denmark
- Department of Micro- and Nanotechnology
- 2800 Kgs. Lyngby
- Denmark
| | - Søren Kynde
- University of Copenhagen
- Niels Bohr Institute
- 2100 Copenhagen
- Denmark
| | | | - Koji Kinoshita
- University of Southern Denmark
- Department of Physics
- Chemistry and Pharmacy
- 5230 Odense
- Denmark
| | - Simon Krabbe
- University of Copenhagen
- Department of Biology
- 2100 Copenhagen
- Denmark
| | | | | | - Kristoffer Almdal
- Technical University of Denmark
- Department of Micro- and Nanotechnology
- 2800 Kgs. Lyngby
- Denmark
| | - Claus Hèlix-Nielsen
- Technical University of Denmark
- Department of Environmental Engineering
- 2800 Kgs. Lyngby
- Denmark
- Aquaporin A/S
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16
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Okazaki S, Tachibana Y, Koga-Ogawa Y, Takeshita K. Redox evaluation in sepsis model mice by the in vivo ESR technique using acyl-protected hydroxylamine. Free Radic Biol Med 2014; 68:72-9. [PMID: 24296247 DOI: 10.1016/j.freeradbiomed.2013.11.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/25/2013] [Revised: 11/11/2013] [Accepted: 11/12/2013] [Indexed: 12/22/2022]
Abstract
In vivo electron spin resonance (ESR) spectroscopy is a noninvasive technique that measures the oxidative stress in living experimental animals. The rate of decay of the ESR signal right after an injection of nitroxyl radical has been measured to evaluate the oxidative stress in animals, although the probe's disposition could also affect this rate. Because the amount of probes forming the redox pair of hydroxyl amine and its corresponding nitroxyl radical was shown to be nearly constant in most organs or tissues 10min after the injection of 1-acetoxy-3-carbamoyl-2,2,5,5-tetramethylpyrrolidine (ACP) in mice, we evaluated the oxidative stress in sepsis model mice induced by lipopolysaccharide (LPS) by intravenously injecting ACP as a precursor of redox probes. The in vivo ESR signal increased up to 7-8min after the ACP injection and then decreased. Decay of the in vivo signal in LPS-treated mice was significantly slower than that in healthy mice, whereas no significant difference was observed in the rate of change in the total amount of redox probes in the blood and liver between these groups. ESR imaging showed that the in vivo signals observed at the chest and upper abdomen decayed slowly in LPS-treated mice. Suppression of the decay in LPS-treated mice was canceled by the administration of a combination of pegylated superoxide dismutase and catalase, or an inhibitor of nitric oxide synthase, or gadolinium chloride. These results indicate that the LPS-treated mouse is under oxidative stress and that reactive oxygen species, such as superoxide and peroxynitrite, related to macrophages are mainly involved in the oxidative stress.
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Affiliation(s)
- Shoko Okazaki
- Faculty of Pharmaceutical Sciences, Sojo University, Kumamoto 860-0082, Japan
| | - Yoko Tachibana
- Faculty of Pharmaceutical Sciences, Sojo University, Kumamoto 860-0082, Japan
| | - Yukari Koga-Ogawa
- Faculty of Pharmaceutical Sciences, Sojo University, Kumamoto 860-0082, Japan
| | - Keizo Takeshita
- Faculty of Pharmaceutical Sciences, Sojo University, Kumamoto 860-0082, Japan; National Institute of Radiological Sciences, Chiba 263-8555, Japan.
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17
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Takeshita K, Okazaki S, Itoda A. Nitroxyl Radicals Remarkably Enhanced the Superoxide Anion Radical-Induced Chemiluminescence of Cypridina Luciferin Analogues. Anal Chem 2013; 85:6833-9. [DOI: 10.1021/ac401002v] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Keizo Takeshita
- Laboratory
of Analytical Chemistry, Faculty of Pharmaceutical
Sciences, Sojo University, 4-22-1 Ikeda,
Nishi-ku, Kumamoto 860-0082, Japan
| | - Shoko Okazaki
- Laboratory
of Analytical Chemistry, Faculty of Pharmaceutical
Sciences, Sojo University, 4-22-1 Ikeda,
Nishi-ku, Kumamoto 860-0082, Japan
| | - Akiko Itoda
- Laboratory
of Analytical Chemistry, Faculty of Pharmaceutical
Sciences, Sojo University, 4-22-1 Ikeda,
Nishi-ku, Kumamoto 860-0082, Japan
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18
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Frecus B, Rinkevicius Z, Ågren H. π-Stacking effects on the EPR parameters of a prototypical DNA spin label. Phys Chem Chem Phys 2013; 15:10466-71. [PMID: 23685812 DOI: 10.1039/c3cp51129d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The character and value of spin labels for probing environments like double-stranded DNA depend on the degree of change in the spin Hamiltonian parameters of the spin label induced by the environment. Herein we provide a systematic theoretical investigation of this issue, based on a density functional theory method applied to a spin labeled DNA model system, focusing on the dependence of the EPR properties of the spin label on the π stacking and hydrogen bonding that occur upon incorporating the spin label into the selected base pair inside DNA. It is found that the EPR spin Hamiltonian parameters of the spin label are only negligibly affected by its incorporation into DNA, when compared to its free form. This result gives a theoretical ground for the common empirical assumption regarding the behaviour of spin Hamiltonian parameters made in EPR based measurements of the distance between spin labels incorporated into DNA.
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Affiliation(s)
- Bogdan Frecus
- KTH Royal Institute of Technology, School of Biotechnology, Division of Theoretical Chemistry & Biology, SE-106 91 Stockholm, Sweden.
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19
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Müller D, Adelsberger K, Imming P. Organic Preparations with Molar Amounts of Volatile Malodorous Thiols. SYNTHETIC COMMUN 2013. [DOI: 10.1080/00397911.2011.640968] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Diana Müller
- a Institut für Pharmazie, Martin-Luther-Universität , Halle , Germany
| | - Klaus Adelsberger
- b Luft- und Thermotechnik Bayreuth GmbH & Co. , Goldkronach , Germany
| | - Peter Imming
- a Institut für Pharmazie, Martin-Luther-Universität , Halle , Germany
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20
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Frecus B, Rinkevicius Z, Murugan NA, Vahtras O, Kongsted J, Ågren H. EPR spin Hamiltonian parameters of encapsulated spin-labels: impact of the hydrogen bonding topology. Phys Chem Chem Phys 2013; 15:2427-34. [DOI: 10.1039/c2cp43951d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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21
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Matsumoto KI, Nyui M, Kamibayashi M, Ozawa T, Nakanishi I, Anzai K. Temperature-dependent free radical reaction in water. J Clin Biochem Nutr 2011; 50:40-6. [PMID: 22247599 PMCID: PMC3246181 DOI: 10.3164/jcbn.10-145] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2010] [Accepted: 03/15/2011] [Indexed: 11/24/2022] Open
Abstract
Temperature-dependent free radical reactions were investigated using nitroxyl radicals as redox probes. Reactions of two types of nitroxyl radicals, TEMPOL (4-hydroxyl-2,2,6,6-tetramethylpiperidine-N-oxyl) and carbamoyl-PROXYL (3-carbamoyl-2,2,5,5-tetramethylpyrrolidine-N-oxyl), were tested in this paper. Heating a solution containing a nitroxyl radical and a reduced form of glutathione (GSH) caused temperature-dependent decay of electron paramagnetic resonance (EPR) signal of the nitroxyl radical. Heating a solution of the corresponding hydroxylamine form of the nitroxyl radical showed EPR signal recovery. The GSH-dependent reduction of nitroxyl radicals at 70°C was suppressed by antioxidants, spin trapping agents, and/or bubbling N2 gas, although heating carbamoyl-PROXYL with GSH showed temporarily enhanced signal decay by bubbling N2 gas. Since SOD could restrict the GSH-dependent EPR signal decay of TEMPOL, O2•− is related with this reaction. O2•− was probably generated from dissolved oxygen in the reaction mixture. Oxidation of the hydroxylamines at 70°C was also suppressed by bubbling N2 gas. Heating a solution of spin trapping agent, DMPO (5,5-dimethyl-1-pyrroline-N-oxide) showed a temperature-dependent increase of the EPR signal of the hydroxyl radical adduct of DMPO. Synthesis of hydroxyl radical adduct of DMPO at 70°C was suppressed by antioxidants and/or bubbling N2 gas. The results suggested that heating an aqueous solution containing oxygen can generate O2•−.
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Affiliation(s)
- Ken-Ichiro Matsumoto
- Radiation Modifier Research Team, Heavy-Ion Radiobiology Research Group, Research Center for Charged Particle Therapy, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba-shi, Chiba 263-8555, Japan
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22
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Freinbichler W, Colivicchi MA, Stefanini C, Bianchi L, Ballini C, Misini B, Weinberger P, Linert W, Varešlija D, Tipton KF, Della Corte L. Highly reactive oxygen species: detection, formation, and possible functions. Cell Mol Life Sci 2011; 68:2067-79. [PMID: 21533983 PMCID: PMC11114910 DOI: 10.1007/s00018-011-0682-x] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2010] [Revised: 02/27/2011] [Accepted: 03/29/2011] [Indexed: 12/16/2022]
Abstract
The so-called reactive oxygen species (ROS) are defined as oxygen-containing species that are more reactive than O(2) itself, which include hydrogen peroxide and superoxide. Although these are quite stable, they may be converted in the presence of transition metal ions, such as Fe(II), to the highly reactive oxygen species (hROS). hROS may exist as free hydroxyl radicals (HO·), as bound ("crypto") radicals or as Fe(IV)-oxo (ferryl) species and the somewhat less reactive, non-radical species, singlet oxygen. This review outlines the processes by which hROS may be formed, their damaging potential, and the evidence that they might have signaling functions. Since our understanding of the formation and actions of hROS depends on reliable procedures for their detection, particular attention is given to procedures for hROS detection and quantitation and their applicability to in vivo studies.
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Affiliation(s)
- Wolfhardt Freinbichler
- Institute for Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9/163-AC, 1060 Vienna, Austria
| | - Maria A. Colivicchi
- Dipartimento di Farmacologia Preclinica e Clinica M. Aiazzi Mancini, Università degli Studi di Firenze, Viale G. Pieraccini 6, 50139 Florence, Italy
| | - Chiara Stefanini
- Dipartimento di Farmacologia Preclinica e Clinica M. Aiazzi Mancini, Università degli Studi di Firenze, Viale G. Pieraccini 6, 50139 Florence, Italy
| | - Loria Bianchi
- Dipartimento di Farmacologia Preclinica e Clinica M. Aiazzi Mancini, Università degli Studi di Firenze, Viale G. Pieraccini 6, 50139 Florence, Italy
- Present Address: Azienda USL 3 di Pistoia, 51100 Pistoia, Italy
| | - Chiara Ballini
- Dipartimento di Farmacologia Preclinica e Clinica M. Aiazzi Mancini, Università degli Studi di Firenze, Viale G. Pieraccini 6, 50139 Florence, Italy
| | - Bashkim Misini
- Institute for Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9/163-AC, 1060 Vienna, Austria
| | - Peter Weinberger
- Institute for Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9/163-AC, 1060 Vienna, Austria
| | - Wolfgang Linert
- Institute for Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9/163-AC, 1060 Vienna, Austria
| | - Damir Varešlija
- Department of Biochemistry, Trinity College, Dublin 2, Ireland
| | - Keith F. Tipton
- Department of Biochemistry, Trinity College, Dublin 2, Ireland
| | - Laura Della Corte
- Dipartimento di Farmacologia Preclinica e Clinica M. Aiazzi Mancini, Università degli Studi di Firenze, Viale G. Pieraccini 6, 50139 Florence, Italy
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23
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Mitochondrial ROS production under cellular stress: comparison of different detection methods. Anal Bioanal Chem 2011; 400:2383-90. [PMID: 21336935 DOI: 10.1007/s00216-011-4764-2] [Citation(s) in RCA: 126] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2010] [Revised: 01/03/2011] [Accepted: 02/02/2011] [Indexed: 12/12/2022]
Abstract
Reactive oxygen species (ROS) are involved in the regulation of many physiological processes. However, overproduction of ROS under various cellular stresses results in cell death and organ injury and thus contributes to a broad spectrum of diseases and pathological conditions. The existence of different cellular sources for ROS and the distinct properties of individual ROS (their reactivity, lifetime, etc.) require adequate detection methods. We therefore compared different models of cellular stress and various ROS-sensitive dyes-2',7'-dichlorodihydrofluorescein diacetate (DCF-DA), MitoSOX™, and MitoTracker® red CM-H(2)XRos-using a confocal fluorescent imaging approach, which has the advantage of not only detecting but also of localizing intracellular sources for ROS. Confocal acquisition of DCF-DA fluorescence can be combined with ROS detection by the mitochondria-specific probes MitoSOX™ and MitoTracker® red CM-H(2)XRos. Specificity was controlled using various antioxidants such as Trolox and N-acetylcysteine. Using different fluorescent ROS-sensitive probes, we detected higher ROS production equally under cell starvation (IL-3 or serum depletion), hypoxia-reoxygenation, or treatment of cells with prooxidants. The detected increase in ROS was approximately threefold in IL-3-depleted 32D cells, approximately 3.5-fold in serum-deprived NIH cells, and 2.5-fold to threefold in hypoxic HL-1 cells, and these findings agree well with previously published spectrofluorometric measurements. In some cases, electron spin resonance (ESR) spectroscopy was used for the validation of results from confocal fluorescent imaging. Our data show that confocal fluorescent imaging and ESR data are in good agreement. Under cellular stress, mitochondrial ROS are released into the cytoplasm and may participate in many processes, but they do not escape from the cell.
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24
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HOU H, DONG R, LARIVIERE JP, MUPPARAJU SP, SWARTZ HM, KHAN N. Synergistic combination of hyperoxygenation and radiotherapy by repeated assessments of tumor pO2 with EPR oximetry. JOURNAL OF RADIATION RESEARCH 2011; 52:568-74. [PMID: 21799293 PMCID: PMC3955714 DOI: 10.1269/jrr.11028] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
The effect of hyperoxygenation with carbogen (95% O(2) + 5% CO(2)) inhalation on RIF-1 tumor pO(2 )and its consequence on growth inhibition with fractionated radiotherapy is reported. The temporal changes in the tumor pO(2) were assessed by in vivo Electron Paramagnetic Resonance (EPR) oximetry in mice breathing 30% O(2) or carbogen and the tumors were irradiated with 4 Gy/day for 5 consecutive days; a protocol that emulates the clinical application of carbogen. The RIF-1 tumors were hypoxic with a tissue pO(2) of 5-9 mmHg. Carbogen (CB) breathing significantly increased tumor pO(2), with a maximum increase at 22.9-31.2 min on days 1-5, however, the magnitude of increase in pO(2) declined on day 5. Radiotherapy during carbogen inhalation (CB/RT) resulted in a significant tumor growth inhibition from day 3 to day 6 as compared to 30%O(2)/RT and carbogen (CB/Sham RT) groups. The results provide unambiguous quantitative information on the effect of carbogen inhalation on tumor pO(2) over the course of 5 days. Tumor growth inhibition in the CB/RT group confirms that the tumor oxygenation with carbogen was radiobiologically significant. Repeated tumor pO(2) measurements by EPR oximetry can provide temporal information that could be used to improve therapeutic outcomes by scheduling doses at times of improved tumor oxygenation.
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Affiliation(s)
- Huagang HOU
- EPR Center for Viable Systems, Dartmouth Medical School, Hanover,
NH, 03755, USA
- Norris Cotton Cancer Center, Dartmouth-Hitchcock Medical Center,
Lebanon, NH 03756, USA
| | - Ruhong DONG
- EPR Center for Viable Systems, Dartmouth Medical School, Hanover,
NH, 03755, USA
- Norris Cotton Cancer Center, Dartmouth-Hitchcock Medical Center,
Lebanon, NH 03756, USA
| | - Jean P. LARIVIERE
- EPR Center for Viable Systems, Dartmouth Medical School, Hanover,
NH, 03755, USA
- Norris Cotton Cancer Center, Dartmouth-Hitchcock Medical Center,
Lebanon, NH 03756, USA
| | - Sriram P. MUPPARAJU
- EPR Center for Viable Systems, Dartmouth Medical School, Hanover,
NH, 03755, USA
- Norris Cotton Cancer Center, Dartmouth-Hitchcock Medical Center,
Lebanon, NH 03756, USA
| | - Harold M. SWARTZ
- EPR Center for Viable Systems, Dartmouth Medical School, Hanover,
NH, 03755, USA
- Norris Cotton Cancer Center, Dartmouth-Hitchcock Medical Center,
Lebanon, NH 03756, USA
| | - Nadeem KHAN
- EPR Center for Viable Systems, Dartmouth Medical School, Hanover,
NH, 03755, USA
- Norris Cotton Cancer Center, Dartmouth-Hitchcock Medical Center,
Lebanon, NH 03756, USA
- Contact information, Phone: 1-603-6533591, Fax: 1-603-6501717,
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25
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Takeshita K, Okazaki S, Kansui H. Effect of Cholesterol on Distribution of Stable, Hydrophobic Perchlorotriphenylmethyl Triethylester Radical Incorporated in Lecithin Liposomal Membranes. Chem Pharm Bull (Tokyo) 2011; 59:624-8. [DOI: 10.1248/cpb.59.624] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Keizo Takeshita
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Sojo University
| | - Shoko Okazaki
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Sojo University
| | - Hisao Kansui
- Laboratory of Organic Chemistry, Faculty of Pharmaceutical Sciences, Sojo University
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26
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Takeshita K, Kawaguchi K, Fujii-Aikawa K, Ueno M, Okazaki S, Ono M, Krishna MC, Kuppusamy P, Ozawa T, Ikota N. Heterogeneity of regional redox status and relation of the redox status to oxygenation in a tumor model, evaluated using electron paramagnetic resonance imaging. Cancer Res 2010; 70:4133-40. [PMID: 20442282 DOI: 10.1158/0008-5472.can-09-4369] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
It is widely accepted that redox status, along with the partial pressure of oxygen (pO(2)), determines the efficacy of some therapeutic methods applied to treat tumors, including radiation. Redox status, evaluated by the reduction of a nitroxyl probe, was reportedly heterogeneous in a mouse tumor model. However, neither variation of heterogeneity of the redox status among mice nor the relation of the redox status to pO(2) in tumors has been characterized sufficiently. In this study, the regional reduction status in a mouse radiation-induced fibrosarcoma tumor model was evaluated using sequential three-dimensional electron paramagnetic resonance (EPR) imaging after i.v. injection of a tissue-permeable nitroxyl probe, HM-PROXYL. The regional decay of HM-PROXYL signal obeyed first-order kinetics, and the amplitude of the reduction rate and extent of its heterogeneity in a tumor varied among six mice. The tissue pO(2) was measured using EPR oximetry with lithium phthalocyanine (LiPc) microcrystals implanted within the tumor. The location of LiPc was determined with EPR imaging. A sequential image was obtained following the injection of HM-PROXYL, even after LiPc implantation, by choosing an HM-PROXYL signal peak which does not overlap with the signal of LiPc. The relationship between pO(2) and the reduction rate at the region of pO(2) measurement was found to be low (r = 0.357) in 13 tumor-bearing mice, indicating that the extent of oxygenation does not necessarily affect the redox status under air-breathing conditions. The results strongly indicate the necessity of measurements of both redox status and oxygenation in every tumor to characterize tumor physiology.
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Affiliation(s)
- Keizo Takeshita
- Faculty of Pharmaceutical Sciences, Sojo University, Kumamoto, Japan.
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27
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Hatano B, Araya H, Yoshimura Y, Sato H, Ito T, Ogata T, Kijima T. Facile Synthesis of 3-Methoxycarbonyl-2,2,5,5-tetra-methylpyrrolidine-1-oxyl and Derivatives. HETEROCYCLES 2010. [DOI: 10.3987/com-09-11861] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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28
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Zhelev Z, Bakalova R, Aoki I, Matsumoto KI, Gadjeva V, Anzai K, Kanno I. Nitroxyl radicals for labeling of conventional therapeutics and noninvasive magnetic resonance imaging of their permeability for blood-brain barrier: relationship between structure, blood clearance, and MRI signal dynamic in the brain. Mol Pharm 2009; 6:504-12. [PMID: 19718801 DOI: 10.1021/mp800175k] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The present study describes a novel nonradioactive methodology for in vivo noninvasive, real-time imaging of blood-brain barrier (BBB) permeability for conventional drugs, using nitroxyl radicals as spin-labels and magnetic resonance imaging (MRI). Two TEMPO-labeled analogues (SLENU and SLCNUgly) of the anticancer drug lomustine [1-(2-chloroethyl)-3-cyclohexyl-1-nitrosourea] were synthesized, using a substitution of the cyclohexyl part with nitroxyl radical. Nonmodified nitroxyl radical TEMPOL was used for comparison. The nitroxyl derivatives were injected intravenously in healthy mice via the tail vein, and MR imaging of the brain was performed on a 7.0 T MRI. The MRI signal dynamic of SLENU and SLCNUgly followed the same kinetics as nonmodified TEMPO radical. SLENU and SLCNUgly were rapidly transported and randomly distributed in the brain tissue, which indicated that the exchange of cyclohexyl part of lomustine with TEMPO radical did not suppress the permeability of the anticancer drug for BBB. The selected nitroxyl derivatives possessed different hydrophobicity, cell permeabilization ability, and blood clearance. Based on these differences, we investigated the relationship betweenthe structure of nitroxyl derivatives, their half-life in the circulation, and their MRI signal dynamic in the brain. This information was important for estimation of the merits and demerits of the described methodology and finding pathways for overcoming the restrictions.
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Affiliation(s)
- Zhivko Zhelev
- Department of Biophysics, Molecular Imaging Center, and Center for Heavy-ion Particle Therapy, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan
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29
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Matsumoto KI, Okajo A, Nagata K, Degraff WG, Nyui M, Ueno M, Nakanishi I, Ozawa T, Mitchell JB, Krishna MC, Yamamoto H, Endo K, Anzai K. Detection of free radical reactions in an aqueous sample induced by low linear-energy-transfer irradiation. Biol Pharm Bull 2009; 32:542-7. [PMID: 19336881 DOI: 10.1248/bpb.32.542] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Quantitative detection of free radical reactions induced by low linear-energy-transfer (LET) irradiation in an aqueous solution was attempted using nitroxyl radicals. The stability and reactivity of reaction mixtures containing a nitroxyl radical and a hydrogen donor, i.e., glutathione (GSH), nicotinamide adenine dinucleotide (NADH), or nicotinamide adenine dinucleotide phosphate (NADPH), were tested. X-band electron paramagnetic resonance (EPR) measurements of several reaction mixtures were performed to find a suitable preparation to quantitatively detect free radical reactions produced by low LET irradiation. The EPR signal intensity of nitroxyl radicals was decreased by low LET irradiation when a hydrogen donor coexisted in the reaction mixture. The combination of 4-hydroxy-2,2,6,6-tetramethylpiperidine-N-oxyl (4-hydroxy-TEMPO, known as TEMPOL) and GSH was most preferable among other preparations tested in this paper, because of the sensitivity and irreversible reaction. The extent of the free radical reaction, i.e., formation of reactive oxygen species, in the reaction mixture depended on the radiation energy when an identical dose was given.
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Affiliation(s)
- Ken-Ichiro Matsumoto
- Radiation Modifier Research Team, Heavy-Ion Radiobiology Research Group, Research Center for Charged Particle Therapy, National Institute of Radiological Sciences, Japan.
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30
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Okajo A, Ui I, Manda S, Nakanishi I, Matsumoto KI, Anzai K, Endo K. Intracellular and Extracellular Redox Environments Surrounding Redox-Sensitive Contrast Agents under Oxidative Atmosphere. Biol Pharm Bull 2009; 32:535-41. [DOI: 10.1248/bpb.32.535] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Aya Okajo
- Department of Physical Chemistry, Showa Pharmaceutical University
| | - Iori Ui
- Department of Physical Chemistry, Showa Pharmaceutical University
| | - Sushma Manda
- Radiation Modifier Research Team, Heavy-Ion Radiobiology Research Group, Research Center for Charged Particle Therapy, National Institute of Radiological Sciences
| | - Ikuo Nakanishi
- Radiation Modifier Research Team, Heavy-Ion Radiobiology Research Group, Research Center for Charged Particle Therapy, National Institute of Radiological Sciences
| | - Ken-ichiro Matsumoto
- Radiation Modifier Research Team, Heavy-Ion Radiobiology Research Group, Research Center for Charged Particle Therapy, National Institute of Radiological Sciences
| | - Kazunori Anzai
- Radiation Modifier Research Team, Heavy-Ion Radiobiology Research Group, Research Center for Charged Particle Therapy, National Institute of Radiological Sciences
| | - Kazutoyo Endo
- Department of Physical Chemistry, Showa Pharmaceutical University
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31
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Zhelev Z, Bakalova R, Aoki I, Matsumoto KI, Gadjeva V, Anzai K, Kanno I. Nitroxyl radicals as low toxic spin-labels for non-invasive magnetic resonance imaging of blood-brain barrier permeability for conventional therapeutics. Chem Commun (Camb) 2008:53-5. [PMID: 19081996 DOI: 10.1039/b816878d] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The present study describes a novel non-radioactive methodology for in vivo non-invasive, real-time imaging of blood-brain barrier (BBB) permeability for conventional drugs, using nitroxyl radicals as spin-labels and magnetic resonance imaging (MRI).
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Affiliation(s)
- Zhivko Zhelev
- Department of Biophysics, Molecular Imaging Center, National Institute of Radiological Sciences, Inage-ku, Chiba 263-8555, Japan
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32
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Okazaki S, Mannan MA, Sawai K, Masumizu T, Miura Y, Takeshita K. Enzymatic reduction-resistant nitroxyl spin probes with spirocyclohexyl rings. Free Radic Res 2007; 41:1069-77. [PMID: 17886028 DOI: 10.1080/10715760701449302] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
To suppress enzymatic reduction of nitroxyl group of spin probes, this study designed two new nitroxyl probes, 4-hydroxy and 4-oxopiperidine-N-oxyls having 4'-hydroxyspirocyclohexyl groups at the 2- and 6-positions of the piperidine ring (hydroxy-DICPO and oxo-DICPO, respectively). The decay of the EPR signal of these probes in mouse liver homogenates was significantly suppressed compared with that of 4-hydroxy- and 4-oxo-2,2,6,6-tetramethylpiperidine-N-oxyl (hydroxy-TEMPO and oxo-TEMPO, respectively), although hydroxy-DICPO and oxo-DICPO showed no difference in the reactivities with ascorbic acid. While both hydroxy- and oxo-DICPO reacted with hydroxyl radicals, only hydoxy-DICPO lost its EPR signal by the reaction with superoxide anion radical in the presence of cysteine. This feature is similar to that observed for hydroxy- and oxo-TEMPO. These results suggest that the introduction of spirocyclohexyl groups to nitroxyl spin probes is effective for protecting the nitroxyl group against enzymatic reduction without changing the characteristics of the reaction with oxygen radicals.
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Affiliation(s)
- Shoko Okazaki
- Faculty of Pharmaceutical Sciences, Sojo University, Kumamoto, Japan
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Manda S, Nakanishi I, Ohkubo K, Kawashima T, Matsumoto KI, Ozawa T, Fukuzumi S, Ikota N, Anzai K. Effect of Solvent Polarity on the One-electron Oxidation of Cyclic Nitroxyl Radicals. CHEM LETT 2007. [DOI: 10.1246/cl.2007.914] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Nakanishi I, Kawaguchi K, Ohkubo K, Kawashima T, Manda S, Kanazawa H, Takeshita K, Anzai K, Ozawa T, Fukuzumi S, Ikota N. Scandium Ion-accelerated Scavenging Reaction of Cumylperoxyl Radical by a Cyclic Nitroxyl Radical via Electron Transfer. CHEM LETT 2007. [DOI: 10.1246/cl.2007.378] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Hirayama A, Nagase S. Electron paramagnetic resonance imaging of oxidative stress in renal disease. Nephron Clin Pract 2006; 103:c71-6. [PMID: 16543759 DOI: 10.1159/000090612] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
The importance of analyzing the kinetics of reactive oxygen species or related substances in vivo is increasing. Electron paramagnetic resonance (EPR) is currently a powerful method for in vivo, non-invasive analysis of oxidative stress. We have applied EPR imaging for murine renal ischemia-reperfusion injury, as a model of acute renal damage, and NF-E2-related factor 2 (Nrf2)-deficient mice, a model for chronic progressive renal disease. In the ischemia-reperfusion model, EPR imaging revealed that the renal radical-reducing activity showed only partial recovery when serum creatinine and BUN have recovered. In the Nrf2-deficient mice, we have revealed that the impaired antioxidant activity is brought by both Nrf2 deficiency and the aging process and may play a key role in the onset of autoimmune nephritis in this model. In addition, EPR imaging is recently being applied to the redox analysis of several nephrosis models, hypertensive rats and streptozotocin-induced diabetic rats. This article summarizes the nephrological application of EPR imaging and in vivo EPR.
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Affiliation(s)
- Aki Hirayama
- Department of Nephrology, Medical Sciences for Control of Pathological Processes, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Japan.
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Takeshita K, Chi C, Hirata H, Ono M, Ozawa T. In vivo generation of free radicals in the skin of live mice under ultraviolet light, measured by L-band EPR spectroscopy. Free Radic Biol Med 2006; 40:876-85. [PMID: 16520239 DOI: 10.1016/j.freeradbiomed.2005.10.049] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2005] [Revised: 09/27/2005] [Accepted: 10/16/2005] [Indexed: 11/18/2022]
Abstract
Although free radicals may be involved in various types of UV-induced injuries, only a few in vivo studies of the generation of free radicals, including oxygen radicals, during exposure to ultraviolet light (UV) have been reported. In this study, the nitroxyl probe 3-carbamoyl-2,2,5,5-tetramethylpyrrolidine-N-oxyl was intravenously injected into hairless mice, and its decay was monitored in the skin with an in vivo EPR spectrometer equipped with a surface-coil-type resonator. The rate of decay of the EPR signal increased during UV (UVA+B) irradiation. This increase in signal decay was suppressed by preadministration of a spin trap, N-tert-butyl-alpha-phenylnitrone (PBN). PBN did not change the rate of signal decay in nonirradiated mice. The correlation between signal decay rate and physiological parameters such as blood velocity, blood mass, or skin temperature was low. The decay rate responded rapidly and reversibly to starting and stopping the UV illumination. Hydroxyl and peroxyl radicals caused reduction of the probe signal in vitro, and PBN inhibited only the peroxyl radical-induced signal reduction. These observations suggest that peroxyl radicals are generated in the skin of live mice during UVA+B irradiation.
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Affiliation(s)
- Keizo Takeshita
- Faculty of Pharmaceutical Sciences, Sojo University, Ikeda, Kumamoto, Japan.
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37
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Ivannikov A, Zhumadilov K, Tieliewuhan E, Jiao L, Zharlyganova D, Apsalikov KN, Berekenova G, Zhumadilov Z, Toyoda S, Miyazawa C, Skvortsov V, Stepanenko V, Endo S, Tanaka K, Hoshi M. Results of EPR dosimetry for population in the vicinity of the most contaminating radioactive fallout trace after the first nuclear test in the Semipalatinsk test site. JOURNAL OF RADIATION RESEARCH 2006; 47 Suppl A:A39-46. [PMID: 16571943 DOI: 10.1269/jrr.47.a39] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
The method of electron paramagnetic resonance (EPR) spectroscopy for tooth enamel is applied to individual radiation dose determination to residents of two villages (Dolon and Mostik) in the vicinity of the Semipalatinsk nuclear test site in Kazakhstan. These villages are located near the central axis of the radioactive fallout trace of the most contaminating surface nuclear test conducted in 1949. It is found that excess doses obtained by subtraction of natural background dose from dose absorbed in enamel range up to 440 mGy to residents of Dolon, whose enamel was formed before 1949, and do not exceed 120 mGy to younger residents. To residents of Mostik, excess doses do not exceed 100 mGy regardless of age except for one resident with an extremely high dose of 1.25 Gy. These results are in agreement with the pattern of radioactive contamination of the territory after the nuclear test of 1949 except one case of extremely high dose, which should be additionally investigated.
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Affiliation(s)
- Alexander Ivannikov
- Research Institute for Radiation Biology and Medicine (RIRBM), Hiroshima University, Japan.
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Toyoda S, Imata H, Romanyukha A, Hoshi M. Toward high sensitivity ESR dosimetry of mammal teeth: the effect of chemical treatment. JOURNAL OF RADIATION RESEARCH 2006; 47 Suppl A:A71-4. [PMID: 16571947 DOI: 10.1269/jrr.47.a71] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Investigations were conducted into chemical treatments suitable for concentrating enamel from cow teeth. Cow teeth could be used as alternative to human teeth for retrospective dosimetry when human teeth are not available. It is essential to remove dentin from tooth enamel for low dose radiation dosimetry in order to avoid interference to the ESR signal from organic radicals. Increasing the period of chemical treatment with KOH and NaOH reduced the signal intensity of the organic radicals. The sensitivity of the dosimetric signal from inorganic radicals increased slightly with length of treatment with NaOH, which is consistent with removal of dentin, and rose to a maximum of 20% after 5 h with KOH (40 degrees C).
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Affiliation(s)
- Shin Toyoda
- Department of Applied Physics, Okayama University of Science, Japan.
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Skvortsov V, Ivannikov A, Tikunov D, Stepanenko V, Borysheva N, Orlenko S, Nalapko M, Hoshi M. Considerations regarding the implementation of EPR dosimetry for the population in the vicinity of Semipalatinsk nuclear test site based on experience from other radiation accidents. JOURNAL OF RADIATION RESEARCH 2006; 47 Suppl A:A61-9. [PMID: 16571946 DOI: 10.1269/jrr.47.a61] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
General aspects of applying the method of retrospective dose estimation by electron paramagnetic resonance spectroscopy of human tooth enamel (EPR dosimetry) to the population residing in the vicinity of the Semipalatinsk nuclear test site are analyzed and summarized. The analysis is based on the results obtained during 20 years of investigations conducted in the Medical Radiological Research Center regarding the development and practical application of this method for wide-scale dosimetrical investigation of populations exposed to radiation after the Chernobyl accident and other radiation accidents.
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40
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Zhumadilov K, Ivannikov A, Apsalikov KN, Zhumadilov Z, Toyoda S, Zharlyganova D, Tieliewuhan E, Endo S, Tanaka K, Miyazawa C, Okamoto T, Hoshi M. Radiation dose estimation by tooth enamel EPR dosimetry for residents of Dolon and Bodene. JOURNAL OF RADIATION RESEARCH 2006; 47 Suppl A:A47-53. [PMID: 16571944 DOI: 10.1269/jrr.47.a47] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
The method of electron paramagnetic resonance (EPR) dosimetry was applied to the enamel of the teeth extracted from the residents of the Dolon and Bodene settlements of the Beskaragay district, which is the area adjacent to the radioactive fallout of the most contaminating nuclear test of 1949. The individual accidental radiation doses due to the fallout were obtained from the amplitude of the radiation induced EPR signal from the CO2- radical using the calibration method, after determining the parameters of EPR measurements to obtain the best reproducibility of the signal intensities. It was shown that after subtracting the natural background dose from the total absorbed dose obtained by EPR the residents of Dolon and Bodene received accidental radiation doses up to 356 mGy with an average value of 74.1+/-45.5 mGy before 1949 while the younger population received up to about 100 mGy with an average value of 11.5+/-37.7 mGy.
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Affiliation(s)
- Kassym Zhumadilov
- Research Institute for Radiation Biology and Medicine, Hiroshima University, Japan.
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41
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Tanaka K, Endo S, Ivannikov A, Toyoda S, Tieliewuhan E, Zhumadilov K, Miyazawa C, Suga S, Kitagawa K, Hoshi M. Study on influence of X-ray baggage scan on ESR dosimetry for SNTS using human tooth enamel. JOURNAL OF RADIATION RESEARCH 2006; 47 Suppl A:A81-3. [PMID: 16571949 DOI: 10.1269/jrr.47.a81] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
The influence of X-ray baggage scanning on electron spin resonance (ESR) dosimetry studies around the Semipalatinsk Nuclear Test Site (SNTS) has been examined at Incheon Airport in Korea, which is a transfer point of the routes from Kazakhstan to Japan. Utilized dosimeters are Japanese human tooth enamel for ESR and glass dosimeters. The difference between the estimated doses with the X-ray scan and those without it is below the evaluation errors for both ESR and the glass dosimeters. For glass dosimeters, the dose from the X-ray scan is estimated to be lower than the detection limit for the utilized glass dosimeters of ten microGy. This supports the absence of significant difference for the ESR results, which have an error in the order of ten mGy. Since ESR dosimetry for SNTS usually has similar errors, the dose by the X-ray scan in this study is concluded to be negligible in ESR dosimetry using tooth enamel from residents near SNTS.
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Affiliation(s)
- Kenichi Tanaka
- Research Institute for Radiation Biology and Medicine, Hiroshima University, Japan
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Kopáni M, Celec P, Danisovic L, Michalka P, Biró C. Oxidative stress and electron spin resonance. Clin Chim Acta 2005; 364:61-6. [PMID: 16125687 DOI: 10.1016/j.cca.2005.05.016] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2005] [Revised: 05/06/2005] [Accepted: 05/06/2005] [Indexed: 12/16/2022]
Abstract
The body constantly reacts with oxygen as part of the energy producing processes of cells. Oxidative stress is a dysbalance between the production of free radicals as products of these reactions and antioxidant properties of cells. The factors influencing the production of free radicals are physical agents, chemical agents and biological agents. Free radicals are paramagnetic molecules with short time-period for their detection by electron spin resonance (ESR) spectroscopy. The free radical stabilization can be gained by freezing a solution of an organic radical or bonding to spin trapping agents. The spin trapping agents are diamagnetic compounds which rapidly scavenge transient radicals to form stable paramagnetic spin adducts radicals. Because this secondary radical retains an unpaired electron, it can often be detected by electron spin resonance. From ESR spectra can be obtained structural information and kinetic information, information about the formation and decay of the radicals. To study the process of free radical generation is an important step towards reducing the deteriorating effects of oxidative stress.
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Affiliation(s)
- Martin Kopáni
- Comenius University, School of Medicine, Institute of Pathology, Sasinkova 4, 811 08 Bratislava, Slovakia.
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