1
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Decha N, Thonglam J, Meesane J, Pornsuwan S, Tansakul C. Dual functional profluorescent nitroxides for the detection of reactive oxygen species and inhibition of collagen degradation during reassembly. Org Biomol Chem 2024; 22:1254-1268. [PMID: 38251273 DOI: 10.1039/d3ob01667f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2024]
Abstract
High content of reactive oxygen species (ROS) in the human body leads to oxidative stress and serious health problems, such as cancer and cardiovascular or bone diseases. It is also one of the agents that cause collagen damage. Herein, detection of ROS, scavenging of formed carbon-centered radicals and inhibition of collagen fragmentation were performed in a single operation using newly synthesized profluorescent nitroxide PN1via a switch-on approach. Reassembly of acid soluble collagen (ASC) in the presence of hydroxyl and hydroperoxyl radicals, representatives of ROS, was monitored to study the efficiency of the PN1 probe. Self-assembly curves of collagen fibril solution were in accordance with differential scanning calorimetry (DSC) and scanning electron microscopy (SEM) observations, and indicated that PN1 efficiently inhibited the collagen chain scission. In order to prevent the leakage of the probe in materials, a PN2 monomer was successfully incorporated with MMA to form a profluorescent copolymer probe. Furthermore, PN1 and PN2-MMA copolymer probes offered high sensitivity of detection of ROS in the presence of collagen fibrils with detection limits of 1.1 and 2.7 μM, respectively. The mechanism of ROS detection and inhibition of collagen degradation by profluorescent nitroxides was proposed.
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Affiliation(s)
- Nattawut Decha
- Division of Physical Science and Center of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand.
| | - Jutakan Thonglam
- Institute of Biomedical Engineering, Department of Biomedical Science and Biomedical Engineering, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla 90100, Thailand
| | - Jirut Meesane
- Institute of Biomedical Engineering, Department of Biomedical Science and Biomedical Engineering, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla 90100, Thailand
| | - Soraya Pornsuwan
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | - Chittreeya Tansakul
- Division of Physical Science and Center of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand.
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2
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Rayner CL, Bottle SE, Martyn AP, Barnett NL. Preserving Retinal Structure and Function with the Novel Nitroxide Antioxidant, DCTEIO. Neurochem Res 2023; 48:3402-3419. [PMID: 37450210 PMCID: PMC10514139 DOI: 10.1007/s11064-023-03978-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 06/16/2023] [Accepted: 06/27/2023] [Indexed: 07/18/2023]
Abstract
Oxidative stress is a major contributor to progressive neurodegenerative disease and may be a key target for the development of novel preventative and therapeutic strategies. Nitroxides have been successfully utilised to study changes in redox status (biological probes) and modulate radical-induced oxidative stress. This study investigates the efficacy of DCTEIO (5,6-dicarboxy-1,1,3,3-tetraethyllisoindolin-2-yloxyl), a stable, kinetically-persistent, nitroxide-based antioxidant, as a retinal neuroprotectant. The preservation of retinal function following an acute ischaemic/reperfusion (I/R) insult in the presence of DCTEIO was quantified by electroretinography (ERG). Inflammatory responses in retinal glia were analysed by GFAP and IBA-1 immunohistochemistry, and retinal integrity assessed by histology. A nitroxide probe combined with flow cytometry provided a rapid technique to assess oxidative stress and the mitigation offered by antioxidant compounds in cultured 661W photoreceptor cells. DCTEIO protected the retina from I/R-induced damage, maintaining retinal function. Histological analysis showed preservation of retinal integrity with reduced disruption and disorganisation of the inner and outer nuclear layers. I/R injury upregulated GFAP expression, indicative of retinal stress, which was significantly blunted by DCTEIO. The number of 'activated' microglia, particularly in the outer retina, in response to cellular stress was also significantly reduced by DCTEIO, potentially suggesting reduced inflammasome activation and cell death. DCTEIO mitigated oxidative stress in 661W retinal cell cultures, in a dose-dependent fashion. Together these findings demonstrate the potential of DCTEIO as a neuroprotective therapeutic for degenerative diseases of the CNS that involve an ROS-mediated component, including those of the retina e.g. age-related macular degeneration and glaucoma.
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Affiliation(s)
- Cassie L Rayner
- Clem Jones Centre for Regenerative Medicine, Faculty of Health Sciences and Medicine, Bond University, 14 University Drive, Robina, Gold Coast, QLD, 4226, Australia
- Queensland Eye Institute, South Brisbane, QLD, 4101, Australia
| | - Steven E Bottle
- School of Physical and Chemical Sciences, Queensland University of Technology, Brisbane, QLD, 4000, Australia
| | - Alexander P Martyn
- School of Physical and Chemical Sciences, Queensland University of Technology, Brisbane, QLD, 4000, Australia
- Cancer and Ageing Research Program (CARP), Princess Alexandra Hospital, Brisbane, QLD, 4102, Australia
| | - Nigel L Barnett
- Clem Jones Centre for Regenerative Medicine, Faculty of Health Sciences and Medicine, Bond University, 14 University Drive, Robina, Gold Coast, QLD, 4226, Australia.
- Queensland Eye Institute, South Brisbane, QLD, 4101, Australia.
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3
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Uddin MJ, Lo JHJ, Oltman CG, Crews BC, Huda T, Liu J, Kingsley PJ, Lin S, Milad M, Aleem AM, Asaduzzaman A, McIntyre JO, Duvall CL, Marnett LJ. Discovery of a Redox-Activatable Chemical Probe for Detection of Cyclooxygenase-2 in Cells and Animals. ACS Chem Biol 2022; 17:1714-1722. [PMID: 35786843 PMCID: PMC10464600 DOI: 10.1021/acschembio.1c00961] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Cyclooxygenase-2 (COX-2) expression is up-regulated in inflammatory tissues and many premalignant and malignant tumors. Assessment of COX-2 protein in vivo, therefore, promises to be a powerful strategy to distinguish pathologic cells from normal cells in a complex disease setting. Herein, we report the first redox-activatable COX-2 probe, fluorocoxib Q (FQ), for in vivo molecular imaging of pathogenesis. FQ inhibits COX-2 selectively in purified enzyme and cell-based assays. FQ exhibits extremely low fluorescence and displays time- and concentration-dependent fluorescence enhancement upon exposure to a redox environment. FQ enters the cells freely and binds to the COX-2 enzyme. FQ exhibits high circulation half-life and metabolic stability sufficient for target site accumulation and demonstrates COX-2-targeted uptake and retention in cancer cells and pathologic tissues. Once taken up, it undergoes redox-mediated transformation into a fluorescent compound fluorocoxib Q-H that results in high signal-to-noise contrast and differentiates pathologic tissues from non-pathologic tissues for real-time in vivo imaging.
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Affiliation(s)
- Md. Jashim Uddin
- Department of Biochemistry, Vanderbilt University, Nashville, Tennessee 37232 USA
| | - Justin Han-Je Lo
- Department of Biochemistry, Vanderbilt University, Nashville, Tennessee 37232 USA
- Division of Hematology and Oncology, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN 37232 USA
| | - Connor G. Oltman
- Department of Biochemistry, Vanderbilt University, Nashville, Tennessee 37232 USA
| | - Brenda C. Crews
- Department of Biochemistry, Vanderbilt University, Nashville, Tennessee 37232 USA
| | - Tamanna Huda
- Department of Biochemistry, Vanderbilt University, Nashville, Tennessee 37232 USA
| | - Justin Liu
- Department of Biochemistry, Vanderbilt University, Nashville, Tennessee 37232 USA
- Department of Neuroscience, Columbia University, New York City, New York, 10027 USA
| | - Philip J. Kingsley
- Department of Biochemistry, Vanderbilt University, Nashville, Tennessee 37232 USA
| | - Shuyang Lin
- Department of Biochemistry, Vanderbilt University, Nashville, Tennessee 37232 USA
| | - Mathew Milad
- Department of Biochemistry, Vanderbilt University, Nashville, Tennessee 37232 USA
| | - Ansari M. Aleem
- Department of Biochemistry, Vanderbilt University, Nashville, Tennessee 37232 USA
| | - Abu Asaduzzaman
- Department of Electrical Engineering and Computer Science, Wichita State University, Wichita, Kansas 67260 USA
| | - J. Oliver McIntyre
- Departments of Radiology and Radiological Sciences, and Pharmacology, Vanderbilt Institute of Imaging Science, Vanderbilt University School of Medicine, Nashville, Tennessee 37232 USA
| | - Craig L. Duvall
- Department of Biomedical Engineering, Vanderbilt University, Nashville, Tennessee 37232 USA
| | - Lawrence J. Marnett
- Departments of Biochemistry, Chemistry, and Pharmacology, Vanderbilt Institute of Chemical Biology, Vanderbilt-Ingram Cancer Center, Vanderbilt University School of Medicine, Nashville, Tennessee 37232 USA
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4
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Poljak M, Wohlrábová L, Palao E, Nociarová J, Míšek J, Slanina T, Klán P. Chalcogen-based ratiometric reversible BODIPY redox sensors for the determination of enantioselective methionine sulfoxide reductase activity. Chem Commun (Camb) 2022; 58:6389-6392. [PMID: 35543358 DOI: 10.1039/d2cc02016e] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Many serious diseases are associated with degenerative changes caused by oxidative stress triggered by elevated concentrations of reactive oxygen species (ROS) in cells. Therefore, the development of suitable probes for monitoring such processes is of great importance. Here, we introduce a series of sulfur- and selenium-substituted BODIPY derivatives as reversible redox sensors for ROS and enzymatic redox processes. Significant differences in emission maxima and fluorescence quantum yields between the reduced and oxidized forms make them excellent ratiometric turn-on/off probes. Installation of polar sulfonate groups improved their aqueous solubility while retaining their sensing properties, which allowed the probes to monitor the enzymatic activity of enantioselective methionine sulfoxide reductase.
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Affiliation(s)
- Michal Poljak
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic. .,RECETOX, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
| | - Lucie Wohlrábová
- Institute of Organic Chemistry and Biochemistry, Flemingovo náměstí 542, 160 00 Prague, Czech Republic.
| | - Eduardo Palao
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic. .,RECETOX, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
| | - Jela Nociarová
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic. .,RECETOX, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
| | - Jiří Míšek
- Department of Organic Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030/8, 12843 Prague 2, Czech Republic
| | - Tomáš Slanina
- Institute of Organic Chemistry and Biochemistry, Flemingovo náměstí 542, 160 00 Prague, Czech Republic.
| | - Petr Klán
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic. .,RECETOX, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
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5
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Mutlu H. Chemical design and synthesis of macromolecular profluorescent nitroxide systems as self-reporting probes. Polym Chem 2022. [DOI: 10.1039/d1py01645h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The objective of this mini-review article is to highlight the importance of the chemical design towards the synthesis of polymeric profluorescent nitroxides applicable as self-reporting probes.
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Affiliation(s)
- Hatice Mutlu
- Soft Matter Synthesis Laboratory, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
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6
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Dao NV, Ercole F, Li Y, Davis TP, Kaminskas LM, Sloan EK, Quinn JF, Whittaker MR. Nitroxide-functional PEGylated nanostars arrest cellular oxidative stress and exhibit preferential accumulation in co-cultured breast cancer cells. J Mater Chem B 2021; 9:7805-7820. [PMID: 34586131 DOI: 10.1039/d1tb00812a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The limited application of traditional antioxidants to reducing elevated levels of reactive oxygen species (ROS) is potentially due to their lack of stability and biocompatibility when tested in a biological milieu. For instance, the poor biological antioxidant performance of small molecular nitroxides arises from their limited diffusion across cell membranes and their significant side effects when applied at high doses. Herein, we describe the use of nanostructured carriers to improve the antioxidant activity of a typical nitroxide derivative, (2,2,6,6-tetramethylpiperidin-1-yl)oxyl (TEMPO). Polymers with star-shaped structures were synthesised and were further conjugated to TEMPO moieties via amide linkages. The TEMPO-loaded stars have small hydrodynamic sizes (<20 nm), and are better tolerated by cells than free TEMPO in a breast cancer-fibroblast co-culture, a system exhibiting elevated ROS levels. At a well-tolerated concentration, the polymer with the highest TEMPO-loading capacity successfully downregulated ROS production in co-cultured cells (a significant decrease of up to 50% vs. basal ROS levels), which was accompanied by a specific reduction in superoxide anion generation in the mitochondria. In contrast, the equivalent concentration of free TEMPO did not achieve the same outcome. Further investigation showed that the TEMPO-conjugated star polymers can be recycled inside the cells, thus providing longer term scavenging activity. Cell association studies demonstrated that the polymers can be taken up by both cell types in the co-culture, and are found to co-locate with the mitochondria. Interestingly the stars exhibited preferential mitochodria targeting in the co-cultured cancer cells compared to accompanying fibroblasts. The data suggest the potential of TEMPO-conjugated star polymers to arrest oxidative stress for various applications in cancer therapy.
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Affiliation(s)
- Nam V Dao
- Australian Research Council - Centre of Excellence in Convergent Bio-Nano Science and Technology, Drug Delivery, Disposition and Dynamics Theme, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia. .,Department of Physical Chemistry and Physics, Hanoi University of Pharmacy, Hanoi 10000, Vietnam
| | - Francesca Ercole
- Australian Research Council - Centre of Excellence in Convergent Bio-Nano Science and Technology, Drug Delivery, Disposition and Dynamics Theme, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia.
| | - Yuhuan Li
- Australian Research Council - Centre of Excellence in Convergent Bio-Nano Science and Technology, Drug Delivery, Disposition and Dynamics Theme, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia. .,Liver Cancer Institute, Zhongshan Hospital, Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, Fudan University, Shanghai 200032, China
| | - Thomas P Davis
- Australian Research Council - Centre of Excellence in Convergent Bio-Nano Science and Technology, Drug Delivery, Disposition and Dynamics Theme, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia. .,Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - Lisa M Kaminskas
- School of Biomedical Sciences, The University of Queensland, St Lucia, QLD 4072, Australia
| | - Erica K Sloan
- Drug Discovery Biology Theme, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia.,Peter MacCallum Cancer Centre, Division of Surgery, Melbournem, VIC 3000, Australia
| | - John F Quinn
- Australian Research Council - Centre of Excellence in Convergent Bio-Nano Science and Technology, Drug Delivery, Disposition and Dynamics Theme, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia. .,Department of Chemical Engineering, Faculty of Engineering, Monash University, Wellington Road, Clayton, Victoria 3800, Australia
| | - Michael R Whittaker
- Australian Research Council - Centre of Excellence in Convergent Bio-Nano Science and Technology, Drug Delivery, Disposition and Dynamics Theme, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia.
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7
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Kubota K, Toyoshima N, Miura D, Jiang J, Maeda S, Jin M, Ito H. Introduction of a Luminophore into Generic Polymers via Mechanoradical Coupling with a Prefluorescent Reagent. Angew Chem Int Ed Engl 2021; 60:16003-16008. [PMID: 33991023 DOI: 10.1002/anie.202105381] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 05/10/2021] [Indexed: 11/11/2022]
Abstract
Herein, we report a novel strategy for introducing a luminophore into generic polymers facilitated by mechanical stimulation. In this study, polymeric mechanoradicals were formed in situ under ball-milling conditions to undergo radical-radical coupling with a prefluorescent nitroxide-based reagent in order to incorporate a luminophore into the polymer main chains via a covalent bond. This method allowed the direct and conceptually simple preparation of luminescent polymeric materials from a wide range of generic polymers such as polystyrene, polymethyl methacrylate, and polyethylene. These results indicate that the present mechanoradical coupling strategy may help to transform existing commodity polymers into more valuable functional materials.
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Affiliation(s)
- Koji Kubota
- Division of Applied Chemistry, Graduate School of Engineering, Hokkaido University, Sapporo, Hokkaido, 060-8628, Japan.,Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo, Hokkaido, 060-8628, Japan
| | - Naoki Toyoshima
- Division of Applied Chemistry, Graduate School of Engineering, Hokkaido University, Sapporo, Hokkaido, 060-8628, Japan
| | - Daiyo Miura
- Division of Applied Chemistry, Graduate School of Engineering, Hokkaido University, Sapporo, Hokkaido, 060-8628, Japan
| | - Julong Jiang
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo, Hokkaido, 060-8628, Japan.,Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, Hokkaido, 060-8628, Japan
| | - Satoshi Maeda
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo, Hokkaido, 060-8628, Japan.,Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, Hokkaido, 060-8628, Japan
| | - Mingoo Jin
- Division of Applied Chemistry, Graduate School of Engineering, Hokkaido University, Sapporo, Hokkaido, 060-8628, Japan.,Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo, Hokkaido, 060-8628, Japan
| | - Hajime Ito
- Division of Applied Chemistry, Graduate School of Engineering, Hokkaido University, Sapporo, Hokkaido, 060-8628, Japan.,Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo, Hokkaido, 060-8628, Japan
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8
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Kubota K, Toyoshima N, Miura D, Jiang J, Maeda S, Jin M, Ito H. Introduction of a Luminophore into Generic Polymers via Mechanoradical Coupling with a Prefluorescent Reagent. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202105381] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Koji Kubota
- Division of Applied Chemistry Graduate School of Engineering Hokkaido University Sapporo Hokkaido 060-8628 Japan
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD) Hokkaido University Sapporo Hokkaido 060-8628 Japan
| | - Naoki Toyoshima
- Division of Applied Chemistry Graduate School of Engineering Hokkaido University Sapporo Hokkaido 060-8628 Japan
| | - Daiyo Miura
- Division of Applied Chemistry Graduate School of Engineering Hokkaido University Sapporo Hokkaido 060-8628 Japan
| | - Julong Jiang
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD) Hokkaido University Sapporo Hokkaido 060-8628 Japan
- Department of Chemistry Faculty of Science Hokkaido University Sapporo Hokkaido 060-8628 Japan
| | - Satoshi Maeda
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD) Hokkaido University Sapporo Hokkaido 060-8628 Japan
- Department of Chemistry Faculty of Science Hokkaido University Sapporo Hokkaido 060-8628 Japan
| | - Mingoo Jin
- Division of Applied Chemistry Graduate School of Engineering Hokkaido University Sapporo Hokkaido 060-8628 Japan
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD) Hokkaido University Sapporo Hokkaido 060-8628 Japan
| | - Hajime Ito
- Division of Applied Chemistry Graduate School of Engineering Hokkaido University Sapporo Hokkaido 060-8628 Japan
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD) Hokkaido University Sapporo Hokkaido 060-8628 Japan
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9
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Yokoi T, Murata K, Ishii K. Photochemistry of phthalocyanine based on spin angular momenta: a kinetic study of fluorescent probes for ascorbic acid. PURE APPL CHEM 2021. [DOI: 10.1515/pac-2021-0301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Ascorbic acid, i.e., vitamin C, is a well-known essential nutrient, and has attracted considerable attention as a new candidate for cancer therapy. Previously, R2c consisting of silicon tetra-tert-butylphthalocyanine (SiPc) and two 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) radicals has been encapsulated into the hydrophobic cavity of dimeric bovine serum albumin (BSA), i.e., R2c@(BSA)2, and the system was found to behave as a highly sensitive and selective fluorescent probe for detecting ascorbic acid not only in aqueous solutions but also in vivo. In this study, kinetics of the reaction of R2c@(BSA)2 with ascorbic acid have been studied based on the temporal evolution of fluorescence. Global fitting of the concentration dependence using the Runge-Kutta method revealed the existence of stepwise two proton-coupled electron transfer processes. The rate constants for the reactions with ascorbic acid (k
AA
) and ascorbate radical (k
AR
) were 3 × 10 and 1 × 105 min−1 M−1, respectively, suggesting that the reaction with ascorbate radical was much faster than that with ascorbic acid. These results were further corroborated by theoretical calculations of the Gibbs free energy differences and by spin statistical factors. The analysis presented herein will aid in understanding the two proton-coupled electron transfer processes in the reaction with ascorbic acid.
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Affiliation(s)
- Takanori Yokoi
- Institute of Industrial Science, The University of Tokyo , 4-6-1 Komaba Meguro-ku , Tokyo , 153-8505 , Japan
| | - Kei Murata
- Institute of Industrial Science, The University of Tokyo , 4-6-1 Komaba Meguro-ku , Tokyo , 153-8505 , Japan
| | - Kazuyuki Ishii
- Institute of Industrial Science, The University of Tokyo , 4-6-1 Komaba Meguro-ku , Tokyo , 153-8505 , Japan
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10
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Gurská M, Brezová V, Šalitroš I, Švorc Ľ, Špánik I, Moncoľ J, Pavlik J, Szolcsányi P. Polyradical PROXYL/TEMPO Conjugates Connected by Ester/Amide Bridges: Synthesis, Physicochemical Studies, and DFT Calculations. Chempluschem 2021; 86:396-405. [PMID: 33645915 DOI: 10.1002/cplu.202000803] [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: 12/17/2020] [Revised: 02/11/2021] [Indexed: 12/16/2022]
Abstract
A series of di-/trinitroxide esters and amides featuring PROXYL and/or TEMPO radicals connected with alicyclic bridges were prepared in 61-92 % yields and their properties were analysed by using multiple experimental techniques. The examination of EPR spectra of radicals in organic solvents augmented with DFT calculations brought valuable information on the conformational dynamics and spin exchange mechanisms. Cyclic voltammetry investigations revealed (quasi)reversible electrochemical behaviour of studied nitroxides with their half-wave potentials ranging from -51 to -17 mV. SQUID measurements of selected radicals revealed that the magnetism of di- and trinitroxides is significantly different, since antiferromagnetic coupling in biradicals is notably larger than in triradicals. The single-crystal X-ray analysis of selected biradicals revealed the existence of 3D supramolecular networks of molecules linked through hydrogen-bonding interactions. These polynitroxide radicals can serve as promising bridging or chelating ligands in the synthesis of transition-metal-based molecular magnets.
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Affiliation(s)
- Mária Gurská
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovak Republic.,Polymer Institute, Slovak Academy of Sciences, Dúbravská cesta 9, SK-845 41, Bratislava, Slovak Republic
| | - Vlasta Brezová
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovak Republic
| | - Ivan Šalitroš
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovak Republic.,Department of Inorganic Chemistry, Faculty of Science, Palacký University, 17. listopadu 12, 771 46, Olomouc, Czech Republic.,Central European Institute of Technology, Brno University of Technology, Purkyňova 123, 61200, Brno, Czech Republic
| | - Ľubomír Švorc
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovak Republic.,Department of Chemistry, Faculty of Natural Sciences, Matej Bel University, Tajovského 40, SK-974 00, Banská Bystrica, Slovak Republic
| | - Ivan Špánik
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovak Republic
| | - Ján Moncoľ
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovak Republic
| | - Ján Pavlik
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovak Republic
| | - Peter Szolcsányi
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovak Republic
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11
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Verderosa AD, Dhouib R, Fairfull-Smith KE, Totsika M. Profluorescent Fluoroquinolone-Nitroxides for Investigating Antibiotic⁻Bacterial Interactions. Antibiotics (Basel) 2019; 8:antibiotics8010019. [PMID: 30836686 PMCID: PMC6466543 DOI: 10.3390/antibiotics8010019] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Revised: 02/27/2019] [Accepted: 02/27/2019] [Indexed: 01/13/2023] Open
Abstract
Fluorescent probes are widely used for imaging and measuring dynamic processes in living cells. Fluorescent antibiotics are valuable tools for examining antibiotic⁻bacterial interactions, antimicrobial resistance and elucidating antibiotic modes of action. Profluorescent nitroxides are 'switch on' fluorescent probes used to visualize and monitor intracellular free radical and redox processes in biological systems. Here, we have combined the inherent fluorescent and antimicrobial properties of the fluoroquinolone core structure with the fluorescence suppression capabilities of a nitroxide to produce the first example of a profluorescent fluoroquinolone-nitroxide probe. Fluoroquinolone-nitroxide (FN) 14 exhibited significant suppression of fluorescence (>36-fold), which could be restored via radical trapping (fluoroquinolone-methoxyamine 17) or reduction to the corresponding hydroxylamine 20. Importantly, FN 14 was able to enter both Gram-positive and Gram-negative bacterial cells, emitted a measurable fluorescence signal upon cell entry (switch on), and retained antibacterial activity. In conclusion, profluorescent nitroxide antibiotics offer a new powerful tool for visualizing antibiotic⁻bacterial interactions and researching intracellular chemical processes.
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Affiliation(s)
- Anthony D Verderosa
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4001, Australia.
- Institute of Health and Biomedical Innovation, School of Biomedical Sciences, Queensland University of Technology, Brisbane, QLD 4006, Australia.
| | - Rabeb Dhouib
- Institute of Health and Biomedical Innovation, School of Biomedical Sciences, Queensland University of Technology, Brisbane, QLD 4006, Australia.
| | - Kathryn E Fairfull-Smith
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4001, Australia.
| | - Makrina Totsika
- Institute of Health and Biomedical Innovation, School of Biomedical Sciences, Queensland University of Technology, Brisbane, QLD 4006, Australia.
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12
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Chong KL, Chalmers BA, Cullen JK, Kaur A, Kolanowski JL, Morrow BJ, Fairfull-Smith KE, Lavin MJ, Barnett NL, New EJ, Murphy MP, Bottle SE. Pro-fluorescent mitochondria-targeted real-time responsive redox probes synthesised from carboxy isoindoline nitroxides: Sensitive probes of mitochondrial redox status in cells. Free Radic Biol Med 2018; 128:97-110. [PMID: 29567391 DOI: 10.1016/j.freeradbiomed.2018.03.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Revised: 02/12/2018] [Accepted: 03/06/2018] [Indexed: 11/28/2022]
Abstract
Here we describe new fluorescent probes based on fluorescein and rhodamine that provide reversible, real-time insight into cellular redox status. The new probes incorporate bio-imaging relevant fluorophores derived from fluorescein and rhodamine linked with stable nitroxide radicals such that they cannot be cleaved, either spontaneously or enzymatically by cellular processes. Overall fluorescence emission is determined by reversible reduction and oxidation, hence the steady state emission intensity reflects the balance between redox potentials of critical redox couples within the cell. The permanent positive charge on the rhodamine-based probes leads to their rapid localisation within mitochondria in cells. Reduction and oxidation also leads to marked changes in the fluorophore lifetime, enabling monitoring by fluorescence lifetime imaging microscopy. Finally, we demonstrate that administration of a methyl ester version of the rhodamine-based probe can be used at concentrations as low as 5 nM to generate a readily detected response to redox stress within cells as analysed by flow cytometry.
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Affiliation(s)
- Kok Leong Chong
- ARC Centre of Excellence for Free Radical Chemistry, Faculty of Science and Engineering, Queensland University of Technology (QUT), Brisbane, Queensland, Australia
| | - Benjamin A Chalmers
- ARC Centre of Excellence for Free Radical Chemistry, Faculty of Science and Engineering, Queensland University of Technology (QUT), Brisbane, Queensland, Australia
| | - Jason K Cullen
- Cell and Molecular Biology, Queensland Institute of Medical Research, Brisbane, Australia
| | - Amandeep Kaur
- School of Chemistry, University of Sydney, Australia
| | | | - Benjamin J Morrow
- ARC Centre of Excellence for Free Radical Chemistry, Faculty of Science and Engineering, Queensland University of Technology (QUT), Brisbane, Queensland, Australia
| | - Kathryn E Fairfull-Smith
- ARC Centre of Excellence for Free Radical Chemistry, Faculty of Science and Engineering, Queensland University of Technology (QUT), Brisbane, Queensland, Australia
| | - Martin J Lavin
- Cell and Molecular Biology, Queensland Institute of Medical Research, Brisbane, Australia; University of Queensland, Centre for Clinical Research, Brisbane, Australia
| | | | | | - Michael P Murphy
- MRC Mitochondrial Biology Unit, University of Cambridge, Cambridge CB2 0XY, UK
| | - Steven E Bottle
- ARC Centre of Excellence for Free Radical Chemistry, Faculty of Science and Engineering, Queensland University of Technology (QUT), Brisbane, Queensland, Australia.
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13
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Yokoi T, Ishii K. Dependence of phthalocyanine-based fluorescence on albumin structure: A fluorescent probe for ascorbic acid. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2018.05.036] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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14
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Thomas K, Moody TW, Jensen RT, Tong J, Rayner CL, Barnett NL, Fairfull-Smith KE, Ridnour LA, Wink DA, Bottle SE. Design, synthesis and biological evaluation of hybrid nitroxide-based non-steroidal anti-inflammatory drugs. Eur J Med Chem 2018; 147:34-47. [PMID: 29421569 PMCID: PMC8202972 DOI: 10.1016/j.ejmech.2018.01.077] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 01/15/2018] [Accepted: 01/23/2018] [Indexed: 11/23/2022]
Abstract
Dual-acting hybrid anti-oxidant/anti-inflammatory agents were developed employing the principle of pharmacophore hybridization. Hybrid agents were synthesized by combining stable anti-oxidant nitroxides with conventional non-steroidal anti-inflammatory drugs (NSAIDs). Several of the hybrid nitroxide-NSAID conjugates displayed promising anti-oxidant and anti-inflammatory effects on two Non-Small Cell Lung Cancer (NSCLC) cells (A549 and NCI-H1299) and in ameliorating oxidative stress induced in 661 W retinal cells. One ester-linked nitroxide-aspirin analogue (27) delivered better anti-inflammatory effects (cyclooxygenase inhibition) than the parent compound (aspirin), and also showed similar reactive oxygen scavenging activity to the anti-oxidant, Tempol. In addition, a nitroxide linked to the anti-inflammatory drug indomethacin (39) significantly ameliorated the effects of oxidative stress on 661 W retinal neurons at efficacies greater or equal to the anti-oxidant Lutein. Other examples of the hybrid conjugates displayed promising anti-cancer activity, as demonstrated by their inhibitory effects on the proliferation of A549 NSCLC cells.
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Affiliation(s)
- Komba Thomas
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, (QUT) GPO Box 2434, Brisbane, QLD 4001, Australia
| | - Terry W Moody
- Center for Cancer Research, National Cancer Institute, Cancer and Inflammation Program, Frederick, MD 21702-1201, USA
| | - Robert T Jensen
- Center for Cancer Research, National Cancer Institute, Cancer and Inflammation Program, Frederick, MD 21702-1201, USA
| | - Jason Tong
- Queensland Eye Institute, South Brisbane, Queensland, Australia
| | - Cassie L Rayner
- Queensland Eye Institute, South Brisbane, Queensland, Australia
| | - Nigel L Barnett
- Queensland Eye Institute, South Brisbane, Queensland, Australia; The University of Queensland, UQ Centre for Clinical Research, Herston, Queensland, Australia
| | - Kathryn E Fairfull-Smith
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, (QUT) GPO Box 2434, Brisbane, QLD 4001, Australia
| | - Lisa A Ridnour
- Center for Cancer Research, National Cancer Institute, Cancer and Inflammation Program, Frederick, MD 21702-1201, USA
| | - David A Wink
- Center for Cancer Research, National Cancer Institute, Cancer and Inflammation Program, Frederick, MD 21702-1201, USA
| | - Steven E Bottle
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, (QUT) GPO Box 2434, Brisbane, QLD 4001, Australia.
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15
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Hansen KA, Nerkar J, Thomas K, Bottle SE, O'Mullane AP, Talbot PC, Blinco JP. New Spin on Organic Radical Batteries-An Isoindoline Nitroxide-Based High-Voltage Cathode Material. ACS APPLIED MATERIALS & INTERFACES 2018; 10:7982-7988. [PMID: 29411960 DOI: 10.1021/acsami.7b18252] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Organic electrode materials are a highly promising and environmentally benign class of battery materials with radical polymers being at the forefront of this research. Herein, we report the first example of the 1,1,3,3-tetramethylisoindolin-2-yloxyl class of nitroxides as an organic electrode material and the synthesis and application of a novel styrenic nitroxide polymer, poly(5-vinyl-1,1,3,3-tetramethylisoindolin-2-yloxyl) (PVTMIO). The polymer was synthesized from the precursor monomer, 2-methoxy-5-vinyl-1,1,3,3-tetramethylisoindoline, and subsequent oxidative deprotection yielded the electroactive radical species. Cyclic voltammetry revealed a high oxidation potential of 3.7 V versus Li, placing it among the top of the nitroxide class of electrode materials. The suitability of PVTMIO for utilization in a high-voltage organic radical battery was confirmed with a discharge capacity of 104.7 mAh g-1, high rate performance, and stability under cycling conditions (90% capacity retention after 100 cycles), making it one of the highest reported organic p-dopable cathode materials.
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Affiliation(s)
- Kai-Anders Hansen
- School of Chemistry, Physics and Mechanical Engineering , Queensland University of Technology , 2 George Street , Brisbane , QLD 4000 , Australia
| | - Jawahar Nerkar
- School of Chemistry, Physics and Mechanical Engineering , Queensland University of Technology , 2 George Street , Brisbane , QLD 4000 , Australia
| | - Komba Thomas
- School of Chemistry, Physics and Mechanical Engineering , Queensland University of Technology , 2 George Street , Brisbane , QLD 4000 , Australia
| | - Steven E Bottle
- School of Chemistry, Physics and Mechanical Engineering , Queensland University of Technology , 2 George Street , Brisbane , QLD 4000 , Australia
| | - Anthony P O'Mullane
- School of Chemistry, Physics and Mechanical Engineering , Queensland University of Technology , 2 George Street , Brisbane , QLD 4000 , Australia
| | - Peter C Talbot
- School of Chemistry, Physics and Mechanical Engineering , Queensland University of Technology , 2 George Street , Brisbane , QLD 4000 , Australia
| | - James P Blinco
- School of Chemistry, Physics and Mechanical Engineering , Queensland University of Technology , 2 George Street , Brisbane , QLD 4000 , Australia
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16
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In vivo fluorescence bioimaging of ascorbic acid in mice: Development of an efficient probe consisting of phthalocyanine, TEMPO, and albumin. Sci Rep 2018; 8:1560. [PMID: 29367703 PMCID: PMC5784034 DOI: 10.1038/s41598-018-19762-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Accepted: 01/09/2018] [Indexed: 01/08/2023] Open
Abstract
After a groundbreaking study demonstrated that a high dose of ascorbic acid selectively kills cancer cells, the compound has been tested in the clinic against various forms of cancers, with some success. However, in vivo tracing of intravenously injected ascorbic acid has not been achieved. Herein, we successfully imaged ascorbic acid intravenously injected into mice based on the discovery of a novel, highly sensitive, and appropriately selective fluorescent probe consisting of silicon phthalocyanine (SiPc) and two 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) radicals, i.e., R2c. The radicals in this R2c were encapsulated in dimeric bovine serum albumin, and the sensitivity was >100-fold higher than those of other R2c-based probes. Ascorbic acid intravenously injected into mice was efficiently transported to the liver, heart, lung, and cholecyst. The present results provide opportunities to advance the use of ascorbic acid as cancer therapy.
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17
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Kaur A. Introduction. SPRINGER THESES 2018. [PMCID: PMC7122183 DOI: 10.1007/978-3-319-73405-7_1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Primordial life forms on earth comprised oxygen-sensitive organisms: the anaerobic fermenters and cyanobacteria, which released oxygen as a metabolic by-product, causing the oxygen levels in the atmosphere to rise Benzie (Eur J Nutr 39:53–61, 2000 [1]), Halliwell (Free Radic Res 31:261–272, 1999 [2]).
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Affiliation(s)
- Amandeep Kaur
- School of Chemistry, University of Sydney, Sydney, NSW Australia
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18
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Hansen KA, Blinco JP. Nitroxide radical polymers – a versatile material class for high-tech applications. Polym Chem 2018. [DOI: 10.1039/c7py02001e] [Citation(s) in RCA: 97] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A comprehensive summary of synthetic strategies for the preparation of nitroxide radical polymer materials and a state-of-the-art perspective on their latest and most exciting applications.
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Affiliation(s)
- Kai-Anders Hansen
- School of Chemistry
- Physics and Mechanical Engineering
- Queensland University of Technology
- Brisbane
- Australia
| | - James P. Blinco
- School of Chemistry
- Physics and Mechanical Engineering
- Queensland University of Technology
- Brisbane
- Australia
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19
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Jing Y, Cao Q, Hao L, Yang GG, Hu WL, Ji LN, Mao ZW. A self-assessed photosensitizer: inducing and dual-modal phosphorescence imaging of mitochondria oxidative stress. Chem Commun (Camb) 2018; 54:271-274. [DOI: 10.1039/c7cc07797a] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Mitochondria-targeted Ir(iii)–nitroxide conjugates act as self-assessed PDT agents by simultaneously inducing and dual-modal phosphorescence imaging of mitochondrial oxidative stress.
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Affiliation(s)
- Yang Jing
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University
- Guangzhou 510275
- China
| | - Qian Cao
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University
- Guangzhou 510275
- China
| | - Liang Hao
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University
- Guangzhou 510275
- China
| | - Gang-Gang Yang
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University
- Guangzhou 510275
- China
| | - Wei-Liang Hu
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University
- Guangzhou 510275
- China
| | - Liang-Nian Ji
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University
- Guangzhou 510275
- China
| | - Zong-Wan Mao
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University
- Guangzhou 510275
- China
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20
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Poprac P, Poliak P, Kavala M, Barbieriková Z, Zalibera M, Fronc M, Švorc Ľ, Vihonská Z, Olejníková P, Lušpai K, Lukeš V, Brezová V, Szolcsányi P. Polyradical PROXYL/TEMPO-Derived Amides: Synthesis, Physicochemical Studies, DFT Calculations, and Antimicrobial Activity. Chempluschem 2017; 82:1326-1340. [PMID: 31957189 DOI: 10.1002/cplu.201700343] [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] [Received: 08/08/2017] [Revised: 10/18/2017] [Indexed: 01/09/2023]
Abstract
A series of polynitroxide amides possessing 2,2,5,5-tetramethyl-1-pyrrolidinyloxy (PROXYL) and/or 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) units connected through various bridges were synthesized and their properties were analyzed. EPR spectroscopy provided detailed insight into their paramagnetic character and related properties. A thorough examination of the EPR spectra of dinitroxides in organic solvents provided valuable information on the intramolecular motions, thermodynamics, and spin-exchange mechanisms. Analysis of low-temperature X- and Q-band EPR spectra of the dissolved dinitroxides provided spin-spin distances that were comparable with the theoretical values obtained by DFT. Cyclic voltammetry investigations revealed (quasi)reversible electrochemical behavior for PROXYL-derived biradicals, whereas significant loss of the reversibility was found for TEMPO-containing bi- and polyradicals. The inhibitory activities of the nitroxides against model bacteria, yeasts, and filamentous fungi were assessed.
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Affiliation(s)
- Patrik Poprac
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovakia
| | - Peter Poliak
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovakia
| | - Miroslav Kavala
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovakia
| | - Zuzana Barbieriková
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovakia
| | - Michal Zalibera
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovakia
| | - Marek Fronc
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovakia
| | - Ľubomír Švorc
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovakia
| | - Zuzana Vihonská
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovakia
| | - Petra Olejníková
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovakia
| | - Karol Lušpai
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovakia
| | - Vladimír Lukeš
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovakia
| | - Vlasta Brezová
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovakia
| | - Peter Szolcsányi
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovakia
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21
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Li B, He Z, Zhou H, Zhang H, Cheng T. Reversible fluorescent probes for chemical and biological redox process. CHINESE CHEM LETT 2017. [DOI: 10.1016/j.cclet.2017.08.055] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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22
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Prescott C, Bottle SE. Biological Relevance of Free Radicals and Nitroxides. Cell Biochem Biophys 2017; 75:227-240. [PMID: 27709467 DOI: 10.1007/s12013-016-0759-0] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Accepted: 08/18/2016] [Indexed: 12/31/2022]
Abstract
Nitroxides are stable, kinetically-persistent free radicals which have been successfully used in the study and intervention of oxidative stress, a critical issue pertaining to cellular health which results from an imbalance in the levels of damaging free radicals and redox-active species in the cellular environment. This review gives an overview of some of the biological processes that produce radicals and other reactive oxygen species with relevance to oxidative stress, and then discusses interactions of nitroxides with these species in terms of the use of nitroxides as redox-sensitive probes and redox-active therapeutic agents.
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23
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Sasaki K, Ito T, Fujii HG, Sato S. Synthesis and Reduction Kinetics of Five Ibuprofen-Nitroxides for Ascorbic Acid and Methyl Radicals. Chem Pharm Bull (Tokyo) 2017; 64:1509-1513. [PMID: 27725505 DOI: 10.1248/cpb.c16-00347] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The hybrid compounds 1-5 comprised of five nitroxides with ibuprofen were synthesized and their reduction rate for ascorbic acid (AsA) and methyl radicals were measured in comparison with 3-hydroxy-tetramethylpyrrolidine-1-oxyl (PROXYL) 6. The rate constants in reduction reaction with 200-fold excess of AsA were determined in following order: 1 (0.42±0.06), 3 (0.17±0.06), 2 (0.10±0.05), and 6 (0.09±0.02 M-1s-1). The remaining two sterically shielded nitroxides 4 and 5 scarcely reacted with AsA. In the reaction with the more reactive methyl radicals, produced by 200-fold excess of Fenton's reagent, the reduction rates of 2, 4, and 5 were in the following decreasing order: 2 (1.1±0.2), 4 (0.76±0.09), and 5 (0.31±0.03 M-1s-1).
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Affiliation(s)
- Kota Sasaki
- Graduate School of Science and Engineering, Yamagata University
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24
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Allen JP, Pfrunder MC, McMurtrie JC, Bottle SE, Blinco JP, Fairfull‐Smith KE. BODIPY‐Based Profluorescent Probes Containing
Meso
‐ and β‐Substituted Isoindoline Nitroxides. European J Org Chem 2017. [DOI: 10.1002/ejoc.201601280] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Jesse P. Allen
- Faculty of Science and Engineering Queensland University of Technology (QUT) 2 George St 4001 Brisbane QLD Australia
| | - Michael C. Pfrunder
- Faculty of Science and Engineering Queensland University of Technology (QUT) 2 George St 4001 Brisbane QLD Australia
| | - John C. McMurtrie
- Faculty of Science and Engineering Queensland University of Technology (QUT) 2 George St 4001 Brisbane QLD Australia
| | - Steven E. Bottle
- Faculty of Science and Engineering Queensland University of Technology (QUT) 2 George St 4001 Brisbane QLD Australia
- ARC Centre of Excellence for Free Radical Chemistry and Biotechnology Faculty of Science and Engineering Queensland University of Technology (QUT) 2 George St 4001 Brisbane QLD Australia
| | - James P. Blinco
- Faculty of Science and Engineering Queensland University of Technology (QUT) 2 George St 4001 Brisbane QLD Australia
- ARC Centre of Excellence for Free Radical Chemistry and Biotechnology Faculty of Science and Engineering Queensland University of Technology (QUT) 2 George St 4001 Brisbane QLD Australia
| | - Kathryn E. Fairfull‐Smith
- Faculty of Science and Engineering Queensland University of Technology (QUT) 2 George St 4001 Brisbane QLD Australia
- ARC Centre of Excellence for Free Radical Chemistry and Biotechnology Faculty of Science and Engineering Queensland University of Technology (QUT) 2 George St 4001 Brisbane QLD Australia
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25
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Gao X, Feng G, Manghnani PN, Hu F, Jiang N, Liu J, Liu B, Sun JZ, Tang BZ. A two-channel responsive fluorescent probe with AIE characteristics and its application for selective imaging of superoxide anions in living cells. Chem Commun (Camb) 2017; 53:1653-1656. [DOI: 10.1039/c6cc09307h] [Citation(s) in RCA: 90] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A red-to-green two-channel responsive and AIE-active fluorescent probe was developed to selectively detect superoxide anions in living cells.
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Affiliation(s)
- Xiaoying Gao
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Guangxue Feng
- Department of Chemical and Biomolecular Engineering
- National University of Singapore
- Singapore
- Singapore
| | - Purnima Naresh Manghnani
- Department of Chemical and Biomolecular Engineering
- National University of Singapore
- Singapore
- Singapore
| | - Fang Hu
- Department of Chemical and Biomolecular Engineering
- National University of Singapore
- Singapore
- Singapore
| | - Nan Jiang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Jianzhao Liu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Bin Liu
- Department of Chemical and Biomolecular Engineering
- National University of Singapore
- Singapore
- Singapore
| | - Jing Zhi Sun
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Ben Zhong Tang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
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26
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Yang J, Cao Q, Hu WL, Ye RR, He L, Ji LN, Qin PZ, Mao ZW. Theranostic TEMPO-functionalized Ru(ii) complexes as photosensitizers and oxidative stress indicators. Dalton Trans 2017; 46:445-454. [DOI: 10.1039/c6dt04028d] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
New TEMPO-functionalized Ru(ii) polypyridyl complexes displayed greatly improved PDT efficacy, capable of simultaneously monitoring cellular oxidative stress during photodynamic therapy.
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Affiliation(s)
- Jing Yang
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry
- School of Chemistry and Chemical Engineering
- Sun Yat-Sen University
- Guangzhou 510275
- China
| | - Qian Cao
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry
- School of Chemistry and Chemical Engineering
- Sun Yat-Sen University
- Guangzhou 510275
- China
| | - Wei-Liang Hu
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry
- School of Chemistry and Chemical Engineering
- Sun Yat-Sen University
- Guangzhou 510275
- China
| | - Rui-Rong Ye
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry
- School of Chemistry and Chemical Engineering
- Sun Yat-Sen University
- Guangzhou 510275
- China
| | - Liang He
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry
- School of Chemistry and Chemical Engineering
- Sun Yat-Sen University
- Guangzhou 510275
- China
| | - Liang-Nian Ji
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry
- School of Chemistry and Chemical Engineering
- Sun Yat-Sen University
- Guangzhou 510275
- China
| | - Peter Z. Qin
- Department of Chemistry
- University of Southern California
- Los Angeles
- USA
| | - Zong-Wan Mao
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry
- School of Chemistry and Chemical Engineering
- Sun Yat-Sen University
- Guangzhou 510275
- China
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27
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Sato S, Endo S, Kurokawa Y, Yamaguchi M, Nagai A, Ito T, Ogata T. Synthesis and fluorescence properties of six fluorescein-nitroxide radical hybrid-compounds. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2016; 169:66-71. [PMID: 27337053 DOI: 10.1016/j.saa.2016.06.021] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Revised: 05/21/2016] [Accepted: 06/13/2016] [Indexed: 06/06/2023]
Abstract
Six fluorescein-nitroxide radical hybrid-compounds (2ab, 3ab, 4, and 5) were synthesized by the condensation of 5- or 6-carboxy-fluorescein and 4-amino-TEMPO (2ab), 5- or 6-aminofluorescein and 4-carboxy-TEMPO (3ab), and fluorescein and 4-carboxy-TEMPO (4), or by reaction of the 3-hydroxyl group of fluorescein with DPROXYL-3-ylmethyl methanesulfonate (5). Fluorescence intensities (around 520nm) after reduction of the radical increased to 1.43-, 1.38-, and 1.61-folds for 2a, 2b and 3b respectively; 3a alone exhibited a decrease in intensity on reduction. Since 4 was readily solvolyzed in PBS or even methanol to afford fluorescein and 4-carboxy-TEMPO, its fluorescence change could not be measured. Hybrid compound 5 containing an ether-linkage between the fluorescein phenol and 3-hydroxymethyl-DPROXYL hydroxyl centers, was stable and on reduction, showed a maximum increase (3.21-fold) in relative fluorescence intensity in PBS (pH5.0), despite its remarkably low absolute fluorescence intensity.
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Affiliation(s)
- Shingo Sato
- Graduate School of Science and Engineering, Yamagata University, Jonan 4-3-16, Yonezawa-shi, Yamagata 992-8510, Japan.
| | - Susumu Endo
- Graduate School of Science and Engineering, Yamagata University, Jonan 4-3-16, Yonezawa-shi, Yamagata 992-8510, Japan
| | - Yusuke Kurokawa
- Graduate School of Science and Engineering, Yamagata University, Jonan 4-3-16, Yonezawa-shi, Yamagata 992-8510, Japan
| | - Masaki Yamaguchi
- Graduate School of Science and Engineering, Yamagata University, Jonan 4-3-16, Yonezawa-shi, Yamagata 992-8510, Japan
| | - Akio Nagai
- Graduate School of Science and Engineering, Yamagata University, Jonan 4-3-16, Yonezawa-shi, Yamagata 992-8510, Japan
| | - Tomohiro Ito
- Graduate School of Science and Engineering, Yamagata University, Jonan 4-3-16, Yonezawa-shi, Yamagata 992-8510, Japan
| | - Tateaki Ogata
- Graduate School of Science and Engineering, Yamagata University, Jonan 4-3-16, Yonezawa-shi, Yamagata 992-8510, Japan
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Hansen KA, Fairfull-Smith KE, Bottle SE, Blinco JP. Development of a Redox-Responsive Polymeric Profluorescent Probe. MACROMOL CHEM PHYS 2016. [DOI: 10.1002/macp.201600147] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Kai-Anders Hansen
- School of Chemistry; Physics and Mechanical Engineering; Science and Engineering Faculty; Queensland University of Technology; Queensland 4001 Australia
| | - Kathryn E. Fairfull-Smith
- School of Chemistry; Physics and Mechanical Engineering; Science and Engineering Faculty; Queensland University of Technology; Queensland 4001 Australia
| | - Steven E. Bottle
- School of Chemistry; Physics and Mechanical Engineering; Science and Engineering Faculty; Queensland University of Technology; Queensland 4001 Australia
| | - James P. Blinco
- School of Chemistry; Physics and Mechanical Engineering; Science and Engineering Faculty; Queensland University of Technology; Queensland 4001 Australia
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29
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Yamada KI. Development of a Functional Contrast Agent for Targeting Lipid-derived Radicals. YAKUGAKU ZASSHI 2016; 136:1093-100. [PMID: 27477723 DOI: 10.1248/yakushi.15-00234-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Lipid derived radicals and their metabolic products are closely involved in the pathogenesis of oxidative stress diseases, such as inflammation and angiogenesis, through the formation of a protein or DNA complex. The starting point of lipid peroxide generation is lipid-derived radicals, which increase explosively via radical chain reaction. Therefore, the trapping of lipid-derived radicals is useful in understanding the mechanism of the formation of oxidative stress diseases, and in suppressing the following chain reaction. On the other hand, nitroxides with a stable unpaired electron allow for spin trapping with carbon-centered radicals. Hence, we focused on the following points to develop lipid radical detection methods. 1) Fluorescence will be quenched through interaction with nitroxide's unpaired electron. 2) Nitroxide can react with lipid-derived radicals via radical-radical reaction. 3) Fluorescence will recover from the loss of an unpaired electron in nitroxide, after reaction with the lipid-derived radicals, by using a profluorescent nitroxide. In this paper, I will discuss the development of a lipid-derived detection method using profluorescent nitroxide switching methods, and discuss its application to cell imaging.
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Kolanowski JL, Kaur A, New EJ. Selective and Reversible Approaches Toward Imaging Redox Signaling Using Small-Molecule Probes. Antioxid Redox Signal 2016; 24:713-30. [PMID: 26607478 DOI: 10.1089/ars.2015.6588] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
SIGNIFICANCE Recent research has identified key roles for reactive oxygen species (ROS)/reactive nitrogen species (RNS) in redox signaling, but much remains to be uncovered. Molecular imaging tools to study these processes must not only be selective to enable identification of the ROS/RNS involved but also reversible to distinguish signaling processes from oxidative stress. Fluorescent sensors offer the potential to image such processes with high spatial and temporal resolution. RECENT ADVANCES A broad array of strategies has been developed that enable the selective sensing of ROS/RNS. More recently, attention has turned to the design of reversible small-molecule sensors of global redox state, with a further set of probes capable of reversible sensing of individual ROS/RNS. CRITICAL ISSUES In this study, we discuss the key challenges in achieving simultaneous detection of reversible oxidative bursts with unambiguous determination of a particular ROS/RNS. FUTURE DIRECTIONS We have highlighted key design features of small-molecule probes that show promise in enabling the study of redox signaling, identifying essential parameters that must be assessed for any new probe. Antioxid. Redox Signal. 24, 713-730.
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Affiliation(s)
- Jacek L Kolanowski
- School of Chemistry, The University of Sydney , Sydney, New South Wales, Australia
| | - Amandeep Kaur
- School of Chemistry, The University of Sydney , Sydney, New South Wales, Australia
| | - Elizabeth J New
- School of Chemistry, The University of Sydney , Sydney, New South Wales, Australia
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31
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Matsuoka Y, Yamato M, Yamada KI. Fluorescence probe for the convenient and sensitive detection of ascorbic acid. J Clin Biochem Nutr 2016. [PMID: 26798193 DOI: 10.3164/jcbn.15.105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Ascorbic acid is an important antioxidant that plays an essential role in the biosynthesis of numerous bioactive substances. The detection of ascorbic acid has traditionally been achieved using high-performance liquid chromatography and absorption spectrophotometry assays. However, the development of fluorescence probes for this purpose is highly desired because they provide a much more convenient and highly sensitive technique for the detection of this material. OFF-ON-type fluorescent probes have been developed for the detection of non-fluorescent compounds. Photo-induced electron transfer and fluorescence resonance energy transfer are the two main fluorescence quenching mechanisms for the detection of ascorbic acid, and several fluorescence probes have been reported based on redox-responsive metals and quantum dots. Profluorescent nitroxide compounds have also been developed as non-metal organic fluorescence probes for ascorbic acid. These nitroxide systems have a stable unpaired electron and can therefore react with ascorbic acid and a strong fluorescence quencher. Furthermore, recent synthetic advances have allowed for the synthesis of α-substituted nitroxides with varying levels of reactivity towards ascorbic acid. In this review, we have discussed the design strategies used for the preparation of fluorescent probes for ascorbic acid, with particular emphasis on profluorescent nitroxides, which are unique radical-based redox-active fluorescent probes.
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Affiliation(s)
- Yuta Matsuoka
- Department of Bio-functional Science, Faculty of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Mayumi Yamato
- Innovation Center for Medical Redox Navigation, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Ken-Ichi Yamada
- Department of Bio-functional Science, Faculty of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan; Japan Science and Technology Agency, PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
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32
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Real-time quantification of oxidative stress and the protective effect of nitroxide antioxidants. Neurochem Int 2016; 92:1-12. [DOI: 10.1016/j.neuint.2015.11.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Revised: 10/28/2015] [Accepted: 11/10/2015] [Indexed: 11/18/2022]
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33
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Matsuoka Y, Ohkubo K, Yamasaki T, Yamato M, Ohtabu H, Shirouzu T, Fukuzumi S, Yamada KI. A profluorescent nitroxide probe for ascorbic acid detection and its application to quantitative analysis of diabetic rat plasma. RSC Adv 2016. [DOI: 10.1039/c6ra07693a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
15-((9-(Ethylimino)-10-methyl-9Hbenzo[a]phenoxazin-5-yl)amino)-3,11-dioxa-7-azadispiro[5.1.58.36]hexadecan-7-yloxyl, (Nile-DiPy) has been synthesized and examined as an off–on profluorescent nitroxide probe for measuring ascorbic acid in plasma.
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Affiliation(s)
- Yuta Matsuoka
- Department of Bio-functional Science
- Faculty of Pharmaceutical Sciences
- Kyushu University
- Fukuoka 812-8582
- Japan
| | - Kei Ohkubo
- Department of Material and Life Science
- Graduate School of Engineering
- Osaka University
- ALCA and SENTAN
- Japan Science and Technology Agency (JST)
| | - Toshihide Yamasaki
- Department of Bio-functional Science
- Faculty of Pharmaceutical Sciences
- Kyushu University
- Fukuoka 812-8582
- Japan
| | - Mayumi Yamato
- Innovation Center for Medical Redox Navigation
- Kyushu University
- Fukuoka 812-8582
- Japan
| | - Hiroshi Ohtabu
- Department of Bio-functional Science
- Faculty of Pharmaceutical Sciences
- Kyushu University
- Fukuoka 812-8582
- Japan
| | - Tomonori Shirouzu
- Department of Bio-functional Science
- Faculty of Pharmaceutical Sciences
- Kyushu University
- Fukuoka 812-8582
- Japan
| | - Shunichi Fukuzumi
- Department of Chemistry and Nano Science
- Ewha Womans University
- Seoul 120-750
- Korea
- Faculty of Science and Technology
| | - Ken-ichi Yamada
- Department of Bio-functional Science
- Faculty of Pharmaceutical Sciences
- Kyushu University
- Fukuoka 812-8582
- Japan
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34
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Matsuoka Y, Yamato M, Yamada KI. Fluorescence probe for the convenient and sensitive detection of ascorbic acid. J Clin Biochem Nutr 2015; 58:16-22. [PMID: 26798193 PMCID: PMC4706089 DOI: 10.3164/jcbn.15-105] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Accepted: 09/02/2015] [Indexed: 12/18/2022] Open
Abstract
Ascorbic acid is an important antioxidant that plays an essential role in the biosynthesis of numerous bioactive substances. The detection of ascorbic acid has traditionally been achieved using high-performance liquid chromatography and absorption spectrophotometry assays. However, the development of fluorescence probes for this purpose is highly desired because they provide a much more convenient and highly sensitive technique for the detection of this material. OFF-ON-type fluorescent probes have been developed for the detection of non-fluorescent compounds. Photo-induced electron transfer and fluorescence resonance energy transfer are the two main fluorescence quenching mechanisms for the detection of ascorbic acid, and several fluorescence probes have been reported based on redox-responsive metals and quantum dots. Profluorescent nitroxide compounds have also been developed as non-metal organic fluorescence probes for ascorbic acid. These nitroxide systems have a stable unpaired electron and can therefore react with ascorbic acid and a strong fluorescence quencher. Furthermore, recent synthetic advances have allowed for the synthesis of α-substituted nitroxides with varying levels of reactivity towards ascorbic acid. In this review, we have discussed the design strategies used for the preparation of fluorescent probes for ascorbic acid, with particular emphasis on profluorescent nitroxides, which are unique radical-based redox-active fluorescent probes.
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Affiliation(s)
- Yuta Matsuoka
- Department of Bio-functional Science, Faculty of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Mayumi Yamato
- Innovation Center for Medical Redox Navigation, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Ken-Ichi Yamada
- Department of Bio-functional Science, Faculty of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan; Japan Science and Technology Agency, PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
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35
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Kaur A, Kolanowski JL, New EJ. Reversible Fluorescent Probes for Biological Redox States. Angew Chem Int Ed Engl 2015; 55:1602-13. [DOI: 10.1002/anie.201506353] [Citation(s) in RCA: 102] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Indexed: 12/21/2022]
Affiliation(s)
- Amandeep Kaur
- School of Chemistry; The University of Sydney; NSW 2006 Australia
| | | | - Elizabeth J. New
- School of Chemistry; The University of Sydney; NSW 2006 Australia
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36
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Kaur A, Kolanowski JL, New EJ. Reversible Fluoreszenzsonden für biologische Redoxzustände. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201506353] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Amandeep Kaur
- School of Chemistry; The University of Sydney; NSW 2006 Australia
| | | | - Elizabeth J. New
- School of Chemistry; The University of Sydney; NSW 2006 Australia
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37
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Lussini VC, Blinco JP, Fairfull-Smith KE, Bottle SE. Polyaromatic Profluorescent Nitroxide Probes with Enhanced Photostability. Chemistry 2015; 21:18258-68. [DOI: 10.1002/chem.201503393] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Indexed: 12/20/2022]
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38
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Lederhose P, Haworth NL, Thomas K, Bottle SE, Coote ML, Barner-Kowollik C, Blinco JP. Design of Redox/Radical Sensing Molecules via Nitrile Imine-Mediated Tetrazole-ene Cycloaddition (NITEC). J Org Chem 2015; 80:8009-17. [DOI: 10.1021/acs.joc.5b01088] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Paul Lederhose
- School
of Chemistry, Physics and Mechanical Engineering, Faculty of Science
and Technology, Queensland University of Technology, Queensland 4001, Australia
- Preparative
Macromolecular Chemistry, Institut für Technische Chemie und
Polymerchemie, Karlsruhe Institute of Technology (KIT), Engesserstr. 18, 76131 Karlsruhe, Germany
- Institut
für Biologische Grenzflächen, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Naomi L. Haworth
- ARC
Centre of Excellence for Electromaterials Science, Research School
of Chemistry, The Australian National University, Canberra, ACT 2601, Australia
| | - Komba Thomas
- School
of Chemistry, Physics and Mechanical Engineering, Faculty of Science
and Technology, Queensland University of Technology, Queensland 4001, Australia
| | - Steven E. Bottle
- School
of Chemistry, Physics and Mechanical Engineering, Faculty of Science
and Technology, Queensland University of Technology, Queensland 4001, Australia
| | - Michelle L. Coote
- ARC
Centre of Excellence for Electromaterials Science, Research School
of Chemistry, The Australian National University, Canberra, ACT 2601, Australia
| | - Christopher Barner-Kowollik
- School
of Chemistry, Physics and Mechanical Engineering, Faculty of Science
and Technology, Queensland University of Technology, Queensland 4001, Australia
- Preparative
Macromolecular Chemistry, Institut für Technische Chemie und
Polymerchemie, Karlsruhe Institute of Technology (KIT), Engesserstr. 18, 76131 Karlsruhe, Germany
- Institut
für Biologische Grenzflächen, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - James P. Blinco
- School
of Chemistry, Physics and Mechanical Engineering, Faculty of Science
and Technology, Queensland University of Technology, Queensland 4001, Australia
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39
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Barzegar Amiri Olia M, Schiesser CH, Taylor MK. New reagents for detecting free radicals and oxidative stress. Org Biomol Chem 2015; 12:6757-66. [PMID: 25053503 DOI: 10.1039/c4ob01172d] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Free radicals and oxidative stress play important roles in the deterioration of materials, and free radicals are important intermediates in many biological processes. The ability to detect these reactive species is a key step on the road to their understanding and ultimate control. This short review highlights recent progress in the development of reagents for the detection of free radicals and reactive oxygen species with broad application to materials science as well as biology.
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40
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Morris JC, Walsh LA, Gomes BA, Gigmes D, Fairfull-Smith KE, Bottle SE, Blinco JP. Photo-induced proton coupled electron transfer from a benzophenone ‘antenna’ to an isoindoline nitroxide. RSC Adv 2015. [DOI: 10.1039/c5ra20100d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
When exposed to light, a novel nitroxide-benzophenone hybrid will undergo an energy transfer process whereby the nitroxide enters an excited state which induces an efficient hydrogen atom transfer from unactivated alkanes.
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Affiliation(s)
- Jason C. Morris
- School of Chemistry
- Physics and Mechanical Engineering
- Queensland University of Technology (QUT)
- Brisbane
- Australia
| | - Liam A. Walsh
- School of Chemistry
- Physics and Mechanical Engineering
- Queensland University of Technology (QUT)
- Brisbane
- Australia
| | - Brunell A. Gomes
- School of Chemistry
- Physics and Mechanical Engineering
- Queensland University of Technology (QUT)
- Brisbane
- Australia
| | - Didier Gigmes
- Aix Marseille Université
- CNRS
- ICR UMR 7273
- 13397 Marseille
- France
| | - Kathryn E. Fairfull-Smith
- School of Chemistry
- Physics and Mechanical Engineering
- Queensland University of Technology (QUT)
- Brisbane
- Australia
| | - Steven E. Bottle
- School of Chemistry
- Physics and Mechanical Engineering
- Queensland University of Technology (QUT)
- Brisbane
- Australia
| | - James P. Blinco
- School of Chemistry
- Physics and Mechanical Engineering
- Queensland University of Technology (QUT)
- Brisbane
- Australia
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41
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Simpson EM, Ristovski ZD, Bottle SE, Fairfull-Smith KE, Blinco JP. Modular design of profluorescent polymer sensors. Polym Chem 2015. [DOI: 10.1039/c5py00120j] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Through orthogonal coupling chemistries, the synthesis of profluorescent nitroxide containing polymers for applications as radical or redox sensors is achieved.
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Affiliation(s)
- Emily M. Simpson
- School of Chemistry
- Physics and Mechanical Engineering Queensland University of Technology (QUT)
- Brisbane
- Australia
| | - Zoran D. Ristovski
- School of Chemistry
- Physics and Mechanical Engineering Queensland University of Technology (QUT)
- Brisbane
- Australia
| | - Steven E. Bottle
- School of Chemistry
- Physics and Mechanical Engineering Queensland University of Technology (QUT)
- Brisbane
- Australia
| | - Kathryn E. Fairfull-Smith
- School of Chemistry
- Physics and Mechanical Engineering Queensland University of Technology (QUT)
- Brisbane
- Australia
| | - James P. Blinco
- School of Chemistry
- Physics and Mechanical Engineering Queensland University of Technology (QUT)
- Brisbane
- Australia
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42
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Dynamic, in vivo, real-time detection of retinal oxidative status in a model of elevated intraocular pressure using a novel, reversibly responsive, profluorescent nitroxide probe. Exp Eye Res 2014; 129:48-56. [DOI: 10.1016/j.exer.2014.10.013] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2014] [Revised: 10/15/2014] [Accepted: 10/16/2014] [Indexed: 12/15/2022]
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43
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Jagtap AP, Krstic I, Kunjir NC, Hänsel R, Prisner TF, Sigurdsson ST. Sterically shielded spin labels for in-cell EPR spectroscopy: Analysis of stability in reducing environment. Free Radic Res 2014; 49:78-85. [DOI: 10.3109/10715762.2014.979409] [Citation(s) in RCA: 108] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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44
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Sowers MA, McCombs JR, Wang Y, Paletta JT, Morton SW, Dreaden EC, Boska MD, Ottaviani MF, Hammond PT, Rajca A, Johnson JA. Redox-responsive branched-bottlebrush polymers for in vivo MRI and fluorescence imaging. Nat Commun 2014; 5:5460. [PMID: 25403521 PMCID: PMC4269368 DOI: 10.1038/ncomms6460] [Citation(s) in RCA: 199] [Impact Index Per Article: 19.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Accepted: 10/02/2014] [Indexed: 12/15/2022] Open
Abstract
Stimuli-responsive multimodality imaging agents have broad potential in medical diagnostics. Herein, we report the development of a new class of branched-bottlebrush polymer dual-modality organic radical contrast agents--ORCAFluors--for combined magnetic resonance and near-infrared fluorescence imaging in vivo. These nitroxide radical-based nanostructures have longitudinal and transverse relaxation times that are on par with commonly used heavy-metal-based magnetic resonance imaging (MRI) contrast agents. Furthermore, these materials display a unique compensatory redox response: fluorescence is partially quenched by surrounding nitroxides in the native state; exposure to ascorbate or ascorbate/glutathione leads to nitroxide reduction and a concomitant 2- to 3.5-fold increase in fluorescence emission. This behaviour enables correlation of MRI contrast, fluorescence intensity and spin concentration with tissues known to possess high concentrations of ascorbate in mice. Our in vitro and in vivo results, along with our modular synthetic approach, make ORCAFluors a promising new platform for multimodality molecular imaging.
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Affiliation(s)
- Molly A Sowers
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA
| | - Jessica R McCombs
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA
| | - Ying Wang
- Department of Chemistry, University of Nebraska, Lincoln, Nebraska 68588, USA
| | - Joseph T Paletta
- Department of Chemistry, University of Nebraska, Lincoln, Nebraska 68588, USA
| | - Stephen W Morton
- Department of Chemical Engineering, Koch Institute for Integrative Cancer Research, Institute for Soldier Nanotechnologies, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA
| | - Erik C Dreaden
- Department of Chemical Engineering, Koch Institute for Integrative Cancer Research, Institute for Soldier Nanotechnologies, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA
| | - Michael D Boska
- Department of Radiology, University of Nebraska Medical Center, Omaha, Nebraska 68198
| | - M Francesca Ottaviani
- Department of Earth, Life and Environmental Sciences, University of Urbino, Loc. Corcicchia, 61029 Urbino, Italy
| | - Paula T Hammond
- Department of Chemical Engineering, Koch Institute for Integrative Cancer Research, Institute for Soldier Nanotechnologies, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA
| | - Andrzej Rajca
- Department of Chemistry, University of Nebraska, Lincoln, Nebraska 68588, USA
| | - Jeremiah A Johnson
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA
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Chalmers BA, Saha S, Nguyen T, McMurtrie J, Sigurdsson ST, Bottle SE, Masters KS. TMIO-PyrImid Hybrids are Profluorescent, Site-Directed Spin Labels for Nucleic Acids. Org Lett 2014; 16:5528-31. [DOI: 10.1021/ol502003a] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Benjamin A. Chalmers
- Faculty
of Science and Engineering, Queensland University of Technology, P.O. Box 2434, 2 George Street, Brisbane, QLD 4001, Australia
| | - Subham Saha
- University of Iceland, Department of Chemistry, Science
Institute, Dunhaga 3, 107 Reykjavík, Iceland
| | | | | | - Snorri Th. Sigurdsson
- University of Iceland, Department of Chemistry, Science
Institute, Dunhaga 3, 107 Reykjavík, Iceland
| | - Steven E. Bottle
- Faculty
of Science and Engineering, Queensland University of Technology, P.O. Box 2434, 2 George Street, Brisbane, QLD 4001, Australia
| | - Kye-Simeon Masters
- Faculty
of Science and Engineering, Queensland University of Technology, P.O. Box 2434, 2 George Street, Brisbane, QLD 4001, Australia
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Mravljak J, Ojsteršek T, Pajk S, Sollner Dolenc M. Coumarin-based dual fluorescent spin-probes. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.07.084] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Cao L, Wu Q, Li Q, Shao S, Guo Y. Visualizing the changes in the cellular redox environment using a novel profluorescent rhodamine nitroxide probe. NEW J CHEM 2013. [DOI: 10.1039/c3nj00674c] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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48
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Jayawardena VC, Fairfull-Smith KE, Bottle SE. Improving the Yield of the Exhaustive Grignard Alkylation of N-Benzylphthalimide. Aust J Chem 2013. [DOI: 10.1071/ch12528] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The tetraalkylation of N-benzylphthalimide is the major yield limiting step in the common synthetic route to isoindoline nitroxides. The progress of this reaction was found to be limited by the formation of previously unobserved mono- and dialkyl side products that do not lead to the desired product. The yield for the tetraalkylation of N-benzylphthalimide with ethylmagnesium iodide could be increased (60 % over two steps) when a stepwise addition sequence was employed. The new two-step synthesis offers a practical preparative scale alternative to the current approach.
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Matsuoka Y, Yamato M, Yamasaki T, Mito F, Yamada KI. Rapid and convenient detection of ascorbic acid using a fluorescent nitroxide switch. Free Radic Biol Med 2012; 53:2112-8. [PMID: 23026412 DOI: 10.1016/j.freeradbiomed.2012.09.032] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/10/2012] [Revised: 08/23/2012] [Accepted: 09/24/2012] [Indexed: 11/29/2022]
Abstract
Ascorbic acid is a small-molecule reductant with multiple functions in vivo. Reducing ascorbic acid intake leads to a lack of hydroxylation of prolines and lysines, causing a looser triple helix and resulting in scurvy. Ascorbic acid also acts as an antioxidant to prevent oxidative stress. Because ascorbic acid is related to disease states, rapid and convenient detection of ascorbic acid should be useful in diagnosis. Nitroxide is reduced to the corresponding hydroxylamine by ascorbic acid and a sensitive and novel approach to its detection employs covalent coupling of nitroxide with a fluorophore, leading to intramolecular quenching of fluorescence emission by electron-exchange interactions. Here, we developed a new fluorophore-nitroxide probe, Naph-DiPy nitroxide, for ascorbic acid. Naph-DiPy nitroxide rapidly reacted with ascorbic acid and showed fluorescence enhancement, but not in response to other reductants or reactive oxygen species. To confirm the practical usefulness of the fluorophore-nitroxide probe, we demonstrated the use of Naph-DiPy nitroxide for the measurement of ascorbic acid in the plasma of osteogenic disorder Shionogi rats when fed an ascorbic acid-deficient diet. The results suggest that this novel fluorophore-nitroxide probe could sensitively and easily detect ascorbic acid and be useful as a tool for the diagnosis of disease states.
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Affiliation(s)
- Yuta Matsuoka
- Department of Bio-functional Science, Faculty of Pharmaceutical Sciences, Kyushu University, Fukuoka 812-8582, Japan
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Wang S, Li N, Pan W, Tang B. Advances in functional fluorescent and luminescent probes for imaging intracellular small-molecule reactive species. Trends Analyt Chem 2012. [DOI: 10.1016/j.trac.2012.07.010] [Citation(s) in RCA: 77] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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