Academic Journal
Multi-spin Redox Sensor for Electron Paramagnetic Resonance Studies of Tissue Redox State In Vivo: Validation of Data With a Conventional Spin Probe.
| Τίτλος: | Multi-spin Redox Sensor for Electron Paramagnetic Resonance Studies of Tissue Redox State In Vivo: Validation of Data With a Conventional Spin Probe. |
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| Συγγραφείς: | Lazarova D; Faculty of Medicine, Sofia University 'St. Kliment Ohridski', Sofia, Bulgaria., Nikolova B; Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Sofia, Bulgaria., Zhelev Z; Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Sofia, Bulgaria.; Faculty of Medicine, Trakia University, Stara Zagora, Bulgaria., Getsov P; Faculty of Medicine, Medical University, Sofia, Bulgaria., Mileva M; Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, Bulgaria., Bakalova R; Faculty of Medicine, Sofia University 'St. Kliment Ohridski', Sofia, Bulgaria; ra_bakalova@yahoo.com., Aoki I; Institute for Quantum Medical Science, National Institutes for Quantum Science and Technology (QST), Chiba, Japan. |
| Πηγή: | In vivo (Athens, Greece) [In Vivo] 2025 Sep-Oct; Vol. 39 (5), pp. 2703-2710. |
| Τύπος έκδοσης: | Journal Article |
| Γλώσσα: | English |
| Στοιχεία περιοδικού: | Publisher: International Institute of Anticancer Research Country of Publication: Greece NLM ID: 8806809 Publication Model: Print Cited Medium: Internet ISSN: 1791-7549 (Electronic) Linking ISSN: 0258851X NLM ISO Abbreviation: In Vivo Subsets: MEDLINE |
| Imprint Name(s): | Publication: <2000- > : Attiki, Greece : International Institute of Anticancer Research Original Publication: Athens : Dr. J.G. Delinassios |
| Ιατρικοί όροι (MeSH): | Spin Labels*, Electron Spin Resonance Spectroscopy/methods ; Cyclic N-Oxides/chemistry ; Quantum Dots/chemistry ; Nitrogen Oxides/chemistry ; Animals ; Oxidation-Reduction ; Mice ; Magnetic Resonance Imaging ; Tissue Distribution |
| Περίληψη: | Background/aim: Redox imaging is one of the fastest growing areas in diagnostics of pathologies accompanied by redox imbalance. We describe a multi-spin redox sensor (RS) and its application for redox imaging in mice using electron paramagnetic resonance (EPR) spectroscopy. Materials and Methods: The probe is composed of a quantum dot functionalized with a cyclodextrin shell, conjugated with nitroxide residues (TEMPO) and triphenylphosphonium to achieve intracellular delivery. The data were validated with a conventional spin probe, mito-TEMPO. Nitroxide probe (RS or mito-TEMPO) was injected intravenously in mice under anesthesia. Blood samples were collected from the tail vein at four time intervals within 2 hours and subjected immediately to analysis using EPR spectroscopy. Two hours after injection, mice were sacrificed, five organs were isolated, and tissue homogenates were prepared and subjected to EPR analysis. Results: RS had the same EPR contrast and significantly higher MRI contrast compared to mito-TEMPO. RS circulated longer in the bloodstream than mito-TEMPO, with both substances undergoing reduction in the blood. The distribution of RS and mito-TEMPO in different organs was equal, except for the brain. No adverse side effects were found in mice at the selected dose. Conclusion: Using a non-toxic nanoparticle in the chemical structure of RS as a carrier of nitroxide residues would enhance its translational relevance. (Copyright © 2025, International Institute of Anticancer Research (Dr. George J. Delinasios), All rights reserved.) |
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| Contributed Indexing: | Keywords: Redox state; electron paramagnetic resonance imaging; mito-TEMPO; redox sensor |
| Substance Nomenclature: | 0 (Spin Labels) 0 (Cyclic N-Oxides) VQN7359ICQ (TEMPO) 0 (Nitrogen Oxides) |
| Entry Date(s): | Date Created: 20250828 Date Completed: 20250828 Latest Revision: 20250831 |
| Update Code: | 20260130 |
| PubMed Central ID: | PMC12396052 |
| DOI: | 10.21873/invivo.14069 |
| PMID: | 40877177 |
| Βάση Δεδομένων: | MEDLINE |
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