1
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Highly selective and sensitive colorimetric detection for glyphosate based on β-CD@DNA-CuNCs enzyme mimics. Anal Chim Acta 2022; 1222:339992. [DOI: 10.1016/j.aca.2022.339992] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 04/16/2022] [Accepted: 05/23/2022] [Indexed: 11/19/2022]
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2
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Iron Metabolism in Aging and Age-Related Diseases. Int J Mol Sci 2022; 23:ijms23073612. [PMID: 35408967 PMCID: PMC8998315 DOI: 10.3390/ijms23073612] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 03/21/2022] [Accepted: 03/23/2022] [Indexed: 02/06/2023] Open
Abstract
Iron is a trace metal element necessary to maintain life and is also involved in a variety of biological processes. Aging refers to the natural life process in which the physiological functions of the various systems, organs, and tissues decline, affected by genetic and environmental factors. Therefore, it is imperative to investigate the relationship between iron metabolism and aging-related diseases, including neurodegenerative diseases. During aging, the accumulation of nonheme iron destroys the stability of the intracellular environment. The destruction of iron homeostasis can induce cell damage by producing hydroxyl free radicals, leading to mitochondrial dysfunction, brain aging, and even organismal aging. In this review, we have briefly summarized the role of the metabolic process of iron in the body, then discussed recent developments of iron metabolism in aging and age-related neurodegenerative diseases, and finally, explored some iron chelators as treatment strategies for those disorders. Understanding the roles of iron metabolism in aging and neurodegenerative diseases will fill the knowledge gap in the field. This review could provide new insights into the research on iron metabolism and age-related neurodegenerative diseases.
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3
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Saxon E, Peng X. Recent Advances in Hydrogen Peroxide Responsive Organoborons for Biological and Biomedical Applications. Chembiochem 2021; 23:e202100366. [PMID: 34636113 DOI: 10.1002/cbic.202100366] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 10/10/2021] [Indexed: 12/26/2022]
Abstract
Hydrogen peroxide is the most stable reactive oxygen species generated endogenously, participating in numerous physiological processes and abnormal pathological conditions. Mounting evidence suggests that a higher level of H2 O2 exists in various disease conditions. Thus, H2 O2 functions as an ideal target for site-specific bioimaging and therapeutic targeting. The unique reactivity of organoborons with H2 O2 provides a method for developing chemoselective molecules for biological and biomedical applications. This review highlights the design and application of boron-derived molecules for H2 O2 detection, and the utility of boron moieties toward masking reactive compounds leading to the development of metal prochelators and prodrugs for selectively delivering an active species at the target sites with elevated H2 O2 levels. Additionally, the emergence of H2 O2 -responsive theranostic agents consisting of both therapeutic and diagnostic moieties in one integrated system are discussed. The purpose of this review is to provide a better understanding of the role of boron-derived molecules toward biological and pharmacological applications.
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Affiliation(s)
- Eron Saxon
- University of Wisconsin-Milwaukee, Milwaukee, USA
| | - Xiaohua Peng
- University of Wisconsin-Milwaukee, Milwaukee, USA
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4
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Wang X, Niu X, Sha W, Feng X, Yu L, Zhang Z, Wang W, Yuan Z. An oxidation responsive nano-radiosensitizer increases radiotherapy efficacy by remolding tumor vasculature. Biomater Sci 2021; 9:6308-6324. [PMID: 34519724 DOI: 10.1039/d1bm00834j] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
As an excellent candidate material for nano-sensitizers, gold nanostructures have shown great potential in radiotherapy. Nevertheless, severe hypoxia and low accumulation of nanomedicine caused by poor perfusion at the tumor site have significantly reduced radiotherapy efficacy. Vascular normalization has gained attention owing to its ability to relieve hypoxia and increase perfusion. The synergistic therapy of tumor vascular normalization and radiotherapy has become a new option to increase anti-cancer efficacy. However, the commonly used strategy of suppressing a single growth factor to induce vascular normalization is limited by tumor compensatory effects. In this work, we developed a strategy to inhibit oxidative stress in tumors by generating chelating agents in response to hydrogen peroxide, thereby inhibiting multi-angiogenic factors simultaneously to normalize blood vessels. Concretely, sodium alginate (SA) reacted with 8-quinoline boric acid (QBA) to form SA-QBA. Then gold nanoparticles (Au NPs) were modified with SA-QBA to obtain Au@SA-QBA. The system was simple in structure and could generate 8HQ in response to H2O2in vitro to inhibit oxidative stress and reduce the expression of VEGF, bFGF, and Ang-2. In vivo, the perfusion unit (PU) increased by 78% after Au@SA-QBA treatment, and the coverage of pericytes increased by 32%, which in turn induced vascular normalization. In addition, blood routine and blood biochemical tests confirmed its good biocompatibility and 8HQ was not detected in the supernatant after homogenization of major organs. More importantly, after the synergistic treatment of vascular normalization and radiotherapy (4 Gy), the tumor growth inhibition rate was increased by 38.6% compared to the Au@SA-treated group with negligible side effects to normal tissues.
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Affiliation(s)
- Xiaohui Wang
- Key Laboratory of Functional Polymer Materials, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.
| | - Xiaoyan Niu
- Key Laboratory of Functional Polymer Materials, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.
| | - Weizhou Sha
- Key Laboratory of Functional Polymer Materials, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.
| | - Xiaoyue Feng
- Key Laboratory of Functional Polymer Materials, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.
| | - Licheng Yu
- Key Laboratory of Functional Polymer Materials, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.
| | - Zhenjie Zhang
- Key Laboratory of Functional Polymer Materials, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.
| | - Wei Wang
- Key Laboratory of Functional Polymer Materials, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.
| | - Zhi Yuan
- Key Laboratory of Functional Polymer Materials, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.
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5
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Fluorescent Copper Nanoclusters for Highly Sensitive Monitoring of Hypoxanthine in Fish. JOURNAL OF ANALYSIS AND TESTING 2021. [DOI: 10.1007/s41664-021-00166-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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6
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Chai YL, Gao ZB, Li Z, He LL, Yu F, Yu SC, Wang J, Tian YM, Liu LE, Wang YL, Wu YJ. A novel fluorescent nanoprobe that based on poly(thymine) single strand DNA-templated copper nanocluster for the detection of hydrogen peroxide. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 239:118546. [PMID: 32505107 DOI: 10.1016/j.saa.2020.118546] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 05/22/2020] [Accepted: 05/22/2020] [Indexed: 06/11/2023]
Abstract
In this paper, a label-free fluorescence nanoprobe is constructed based on poly(thymine) single strand DNA-templated Copper nanocluster (denote as: T-CuNCs) for the detection of hydrogen peroxide. In the assay, the fluorescent T-CuNCs will generate though the reaction of Cu2+, poly(thymine) and sodium ascorbate. However, the hydroxyl radical (.OH) will generated in the presence of H2O2, which is able to induced the oxidative lesions of poly(thymine) single chain DNA and lead to the poly(thymine) being splitted into shorter or single oligonucleotide fragments and lose the ability to template the fluorescent T-CuNCs again. Therefore, H2O2 can be detected by monitoring the fluorescence strength change of T-CuNCs. The experimental results show that the fluorescence intensity change of T-CuNCs has fantastic linearity versus H2O2 concentration in the range of 1-30 μM (R2 = 0.9947) and 30-80 μM (R2 = 0.9972) with the limit of detection (LOD) as low as 0.5 μM (S/N = 3). More important, the fluorescent nanoprobe was also successfully utilized on the detection of H2O2 in serum samples. Therefore, a label-free, costless and effective fluorescence method has been established for the detection of H2O2, the intrinsic properties of the nanoprobe endow its more potential applications in chemical and biological study.
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Affiliation(s)
- Yi-Lin Chai
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - Zi-Bo Gao
- College of Public Health, Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - Zhuang Li
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, People's Republic of China
| | - Lei-Liang He
- College of Public Health, Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - Fei Yu
- College of Public Health, Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - Song-Cheng Yu
- College of Public Health, Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - Jia Wang
- College of Public Health, Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - Yong-Mei Tian
- College of Public Health, Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - Li-E Liu
- College of Public Health, Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - Yi-Lin Wang
- College of Public Health, Zhengzhou University, Zhengzhou 450001, People's Republic of China.
| | - Yong-Jun Wu
- College of Public Health, Zhengzhou University, Zhengzhou 450001, People's Republic of China.
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7
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Rakshit A, Khatua K, Shanbhag V, Comba P, Datta A. Cu 2+ selective chelators relieve copper-induced oxidative stress in vivo. Chem Sci 2018; 9:7916-7930. [PMID: 30450181 PMCID: PMC6202919 DOI: 10.1039/c8sc04041a] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Accepted: 09/29/2018] [Indexed: 02/06/2023] Open
Abstract
Copper ions are essential for biological function yet are severely detrimental when present in excess. At the molecular level, copper ions catalyze the production of hydroxyl radicals that can irreversibly alter essential bio-molecules. Hence, selective copper chelators that can remove excess copper ions and alleviate oxidative stress will help assuage copper-overload diseases. However, most currently available chelators are non-specific leading to multiple undesirable side-effects. The challenge is to build chelators that can bind to copper ions with high affinity but leave the levels of essential metal ions unaltered. Here we report the design and development of redox-state selective Cu ion chelators that have 108 times higher conditional stability constants toward Cu2+ compared to both Cu+ and other biologically relevant metal ions. This unique selectivity allows the specific removal of Cu2+ ions that would be available only under pathophysiological metal overload and oxidative stress conditions and provides access to effective removal of the aberrant redox-cycling Cu ion pool without affecting the essential non-redox cycling Cu+ labile pool. We have shown that the chelators provide distinct protection against copper-induced oxidative stress in vitro and in live cells via selective Cu2+ ion chelation. Notably, the chelators afford significant reduction in Cu-induced oxidative damage in Atp7a-/- Menkes disease model cells that have endogenously high levels of Cu ions. Finally, in vivo testing of our chelators in a live zebrafish larval model demonstrate their protective properties against copper-induced oxidative stress.
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Affiliation(s)
- Ananya Rakshit
- Department of Chemical Sciences , Tata Institute of Fundamental Research , 1 Homi Bhabha Road, Colaba , Mumbai-400005 , India .
| | - Kaustav Khatua
- Department of Chemical Sciences , Tata Institute of Fundamental Research , 1 Homi Bhabha Road, Colaba , Mumbai-400005 , India .
| | - Vinit Shanbhag
- Department of Biochemistry , Christopher S. Bond Life Science Center , University of Missouri , Columbia , USA
| | - Peter Comba
- Universität Heidelberg , Anorganisch-Chemisches Institut , Interdisciplinary Center for Scientific Computing , INF 270 , D-69120 Heidelberg , Germany
| | - Ankona Datta
- Department of Chemical Sciences , Tata Institute of Fundamental Research , 1 Homi Bhabha Road, Colaba , Mumbai-400005 , India .
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8
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Wang Q, Franz KJ. Modifying aroylhydrazone prochelators for hydrolytic stability and improved cytoprotection against oxidative stress. Bioorg Med Chem 2018; 26:5962-5972. [PMID: 30429096 DOI: 10.1016/j.bmc.2018.11.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 10/26/2018] [Accepted: 11/04/2018] [Indexed: 12/22/2022]
Abstract
BSIH ((E)-N'-(2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzylidene)isonicotinohydrazide) is a prodrug version of the metal chelator SIH ((E)-N'-(2-hydroxybenzylidene)isonicotinohydrazide) in which a boronate group prevents metal chelation until reaction with hydrogen peroxide releases SIH, which is then available for sequestering iron(III) and inhibiting iron-catalyzed oxidative damage. While BSIH has shown promise for conditionally targeting iron sequestration in cells under oxidative stress, the yield of SIH is limited by the fact that BSIH exists in cell culture media as an equilibrium mixture with its hydrolysis products isoniazid and 2-formylphenyl boronic acid. In the current study, several BSIH analogs were evaluated for their hydrolytic stability, reaction outcomes with H2O2, and prochelator-to-chelator conversion efficiency. Notably, the para-methoxy derivative (p-OMe)BSIH ((E)-N'-(5-methoxy-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzylidene)isonicotinohydrazide) and the meta-, para-double substituted (MD)BSIH ((E)-N'-((6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzo[d][1,3]dioxol-5-yl)methylene)isonicotinohydrazide) showed 1.3- and 1.9-fold improved hydrolytic stability compared to BSIH, respectively, leading to a 22 and 50% increase in chelator released. Moreover, both prochelators were found to protect retinal pigment epithelial cells stressed with either H2O2 or paraquat insult.
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Affiliation(s)
- Qin Wang
- Duke University, Department of Chemistry, 124 Science Dr., Durham, NC 27708, USA
| | - Katherine J Franz
- Duke University, Department of Chemistry, 124 Science Dr., Durham, NC 27708, USA.
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9
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Abstract
Metal ions are essential for a wide range of physiological processes, but they can also be toxic if not appropriately regulated by a complex network of metal trafficking proteins. Intervention in cellular metal distribution with small-molecule or peptide chelating agents has promising therapeutic potential to harness metals to fight disease. Molecular outcomes associated with forming metal-chelate interactions in situ include altering the concentration and subcellular metal distribution, inhibiting metalloenzymes, enhancing the reactivity of a metal species to elicit a favorable biological response, or passivating the reactivity of a metal species to prevent deleterious reactivity. The systemic administration of metal chelating agents, however, raises safety concerns due to the potential risks of indiscriminate extraction of metals from critical metalloproteins and inhibition of metalloenzymes. One can estimate that chelators capable of complexing metal ions with dissociation constants in the submicromolar range are thermodynamically capable of extracting metal ions from some metalloproteins and disrupting regular function. Such dissociation constants are easily attainable for multidentate chelators interacting with first-row d-block metal cations in relevant +1, + 2, and +3 oxidation states. To overcome this challenge of indiscriminate metal chelation, we have pursued a prodrug strategy for chelating agents in which the resulting "prochelator" has negligible metal binding affinity until a specific stimulus generates a favorable metal binding site. The prochelator strategy enables conditional metal chelation to occur preferentially in locations affected by disease- or therapy-associated stimuli, thereby minimizing off-target metal chelation. Our design of responsive prochelators encompasses three general approaches of activation: the "removal" approach operates by eliminating a masking group that blocks a potential metal chelation site to reveal the complete binding site under the desired conditions; the molecular "switch" approach involves a reversible conformational change between inactive and active forms of a chelator with differential metal binding affinity under specific conditions; and the "addition" approach adds a new ligand donor arm to the prochelator to constitute a complete metal chelation site. Adopting these approaches, we have created four categories of triggerable prochelators that respond to (1) reactive oxygen species, (2) light, (3) specific enzymes, and (4) biological regulatory events. This Account highlights progress from our group on building prochelators that showcase these four categories of responsive metal chelating agents for manipulating cellular metals. The creation and chemical understanding of such stimulus-responsive prochelators enables exciting applications for understanding the cell biology of metals and for developing therapies based on metal-dependent processes in a variety of diseases.
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Affiliation(s)
- Qin Wang
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
| | - Katherine J. Franz
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
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10
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Thiele NA, Abboud KA, Sloan KB. Novel double prodrugs of the iron chelator N,N'-bis(2-hydroxybenzyl)ethylenediamine-N,N'-diacetic acid (HBED): Synthesis, characterization, and investigation of activation by chemical hydrolysis and oxidation. Eur J Med Chem 2016; 118:193-207. [PMID: 27128183 DOI: 10.1016/j.ejmech.2016.04.037] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Revised: 03/23/2016] [Accepted: 04/13/2016] [Indexed: 11/26/2022]
Abstract
The development of iron chelators suitable for the chronic treatment of diseases where iron accumulation and subsequent oxidative stress are implicated in disease pathogenesis is an active area of research. The clinical use of the strong chelator N,N'-bis(2-hydroxybenzyl)ethylenediamine-N,N'-diacetic acid (HBED) and its alkyl ester prodrugs has been hindered by poor oral bioavailability and lack of conversion to the parent chelator, respectively. Here, we present novel double prodrugs of HBED that have the carboxylate and phenolate donors of HBED masked with carboxylate esters and boronic acids/esters, respectively. These double prodrugs were successfully synthesized as free bases (7a-f) or as dimesylate salts (8a-c,e), and were characterized by (1)H, (13)C, and (11)B NMR; MP; MS; and elemental analysis. The crystal structure of 8a was solved. Three of the double prodrugs (8a-c) were selected for further investigation into their abilities to convert to HBED by stepwise hydrolysis and H2O2 oxidation. The serial hydrolysis of the pinacol and methyl esters of N,N'-bis(2-boronic acid pinacol ester benzyl)ethylenediamine-N,N'-diacetic acid methyl ester dimesylate (8a) was verified by LC-MS. The macro half-lives for the hydrolyses of 8a-c, measured by UV, ranged from 3.8 to 26.3 h at 37 °C in pH 7.5 phosphate buffer containing 50% MeOH. 9, the product of hydrolysis of 8a-c and the intermediate in the conversion pathway, showed little-to-no affinity for iron or copper in UV competition experiments. 9 underwent a serial oxidative deboronation by H2O2 in N-methylmorpholine buffer to generate HBED (k = 10.3 M(-1) min(-1)). The requirement of this second step, oxidation, before conversion to the active chelator is complete may confer site specificity when only localized iron chelation is needed. Overall, these results provide proof of principle for the activation of the double prodrugs by chemical hydrolysis and H2O2 oxidation, and merit further investigation into the protective capabilities of the prodrugs against H2O2-induced cell death.
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Affiliation(s)
- Nikki A Thiele
- Department of Medicinal Chemistry, University of Florida, Gainesville, FL 32610, USA.
| | - Khalil A Abboud
- Department of Chemistry, University of Florida, Gainesville, FL 32611, USA.
| | - Kenneth B Sloan
- Department of Medicinal Chemistry, University of Florida, Gainesville, FL 32610, USA.
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11
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Tapeinos C, Pandit A. Physical, Chemical, and Biological Structures based on ROS-Sensitive Moieties that are Able to Respond to Oxidative Microenvironments. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:5553-85. [PMID: 27184711 DOI: 10.1002/adma.201505376] [Citation(s) in RCA: 154] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2015] [Revised: 12/27/2015] [Indexed: 05/17/2023]
Abstract
Reactive oxygen species (ROS) (H2 O2 , OCl(-) , (•) OH, O2 (-) ) are a family of reactive molecules that are generated intracellularly and are engaged in many biological processes. In physiological concentrations, ROS act as signaling molecules to a number of metabolic pathways; however, in excess they can be harmful to living organisms. Overproduction of ROS has been related to many pathophysiological conditions and a number of studies have been reported in elucidating their mechanism in these conditions. With the aim of harnessing this role, a number of imaging tools and therapeutic compounds have been developed. Here these imaging and therapeutic tools are reviewed and particularly those structures with ROS-sensitivity based on their biomedical applications and their functional groups. There is also a brief discussion about the method of preparation as well as the mechanism of action.
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Affiliation(s)
- Christos Tapeinos
- Biosciences Building, Center for Research in Medical Devices, National University of Ireland, Galway, Galway, Ireland
| | - Abhay Pandit
- Biosciences Building, Center for Research in Medical Devices, National University of Ireland, Galway, Galway, Ireland
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12
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Oliveri V, Vecchio G. Prochelator strategies for site-selective activation of metal chelators. J Inorg Biochem 2016; 162:31-43. [PMID: 27297691 DOI: 10.1016/j.jinorgbio.2016.05.012] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2016] [Revised: 04/23/2016] [Accepted: 05/13/2016] [Indexed: 02/06/2023]
Abstract
Metal dyshomeostasis has been involved in the etiology of a host of pathologies such as Wilson's, Alzheimer's, Parkinson's, Huntington's, transfusion-related iron overload diseases and cancer. Although metal chelating agents represent a necessary therapeutic strategy in metal overload diseases, long-term use of strong chelators that are not selective, can be anticipated perturbing normal physiological functions of essential metal-requiring biomolecules. In this context, the last decade has seen a growing interest in the development of molecules, referred to as "prochelators", that have little affinity for metal ions until they are activated in response to specific stimuli. Here, we present the main strategies applied to develop safe prochelators and focus on chosen examples to provide an overview of this field to date.
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Affiliation(s)
- Valentina Oliveri
- Dipartimento di Scienze Chimiche, Università degli Studi di Catania, Viale A. Doria, 6, 95125 Catania, Italy; Consorzio Interuniversitario di Ricerca in Chimica dei Metalli nei Sistemi Biologici, C.I.R.C.M.S.B., Unità di Ricerca di Catania, 95125 Catania, Italy.
| | - Graziella Vecchio
- Dipartimento di Scienze Chimiche, Università degli Studi di Catania, Viale A. Doria, 6, 95125 Catania, Italy; Consorzio Interuniversitario di Ricerca in Chimica dei Metalli nei Sistemi Biologici, C.I.R.C.M.S.B., Unità di Ricerca di Catania, 95125 Catania, Italy
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13
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Puttreddy R, Beyeh NK, Rissanen K. Inclusion complexes of Cethyl-2-methylresorcinarene and pyridine N-oxides: breaking the C–I⋯−O–N+ halogen bond by host–guest complexation. CrystEngComm 2016. [DOI: 10.1039/c5ce02354h] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cethyl-2-Methylresorcinarene and aromatic N-oxides manifest host–guest chemistry by C–H⋯π interactions and halogen bonding; the C–I⋯−O–N+ halogen bond with 2-iodopyridine N-oxide is broken by the in-cavity C–I⋯π interactions.
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Affiliation(s)
- Rakesh Puttreddy
- Department of Chemistry
- University of Jyvaskyla
- Nanoscience Center
- , Finland
| | - Ngong Kodiah Beyeh
- Department of Chemistry
- University of Jyvaskyla
- Nanoscience Center
- , Finland
- Department of Applied Physics
| | - Kari Rissanen
- Department of Chemistry
- University of Jyvaskyla
- Nanoscience Center
- , Finland
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14
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Kim KB, Kim H, Song EJ, Kim S, Noh I, Kim C. A cap-type Schiff base acting as a fluorescence sensor for zinc(II) and a colorimetric sensor for iron(II), copper(II), and zinc(II) in aqueous media. Dalton Trans 2014; 42:16569-77. [PMID: 24067938 DOI: 10.1039/c3dt51916c] [Citation(s) in RCA: 239] [Impact Index Per Article: 23.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A simple and low cost chemosensor is described. This sensor could simultaneously detect three biologically important metal ions through fluorogenic (Zn(2+)) and chromogenic (Fe(2+), Cu(2+), and Zn(2+)) methods in aqueous solution. The sensor could function as a "turn-on" fluorescence receptor only to Zn(2+) ions. In addition, the sensor could be successfully applied to the detection of intracellular Zn(2+). Meanwhile, the sensor displayed an obvious red color upon selective binding with Fe(2+). Therefore, the sensor could serve as a useful tool for the discrimination of Fe(2+) from Fe(3+) in aqueous media. Moreover, the sensor also showed color changes from yellow to colorless upon selective binding with Zn(2+) and Cu(2+), respectively. The detection limit of the sensor for Cu(2+) (1.5 μM) is far below the guidelines of the World Health Organization (30 μM) as the maximum allowable copper concentration in drinking water, and therefore it is capable of being a practical system for the monitoring of Cu(2+) concentrations in aqueous samples. These results provide a new approach for selectively recognizing the most important three trace elements in the human body simultaneously, for Zn(2+) by emission spectra and Fe(2+), Cu(2+), and Zn(2+) by the naked eye.
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Affiliation(s)
- Kyung Beom Kim
- Department of Fine Chemistry, Seoul National University of Science and Technology, Seoul 139-743, Korea.
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15
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Ling Y, Zhang N, Qu F, Wen T, Gao ZF, Li NB, Luo HQ. Fluorescent detection of hydrogen peroxide and glucose with polyethyleneimine-templated Cu nanoclusters. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 118:315-320. [PMID: 24055680 DOI: 10.1016/j.saa.2013.08.097] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2013] [Revised: 08/19/2013] [Accepted: 08/24/2013] [Indexed: 06/02/2023]
Abstract
An interesting, simple, and label-free strategy for the detection of hydrogen peroxide and glucose has been developed with polyethyleneimine (PEI)-capped copper nanoclusters as a fluorescence probe in aqueous solution. The PEI-templated Cu nanoclusters which we have synthesized have an average diameter of 1.8 nm and show a blue emission at 480 nm. In the presence of hydrogen peroxide, the fluorescence of the Cu nanoclusters is quenched. Similarly, glucose oxidase catalyzes the oxidation of glucose to gluconic acid and H2O2, so we can also use this probe to detect glucose. Because of the high zymolyte specificity of glucose oxidase, the detection of glucose has good selectivity. Under the optimized experimental conditions, the linear ranges for H2O2 and glucose are 0.5-10 μM and 10-100 μM, respectively. And the detection limits for H2O2 and glucose are 0.4 and 8 μM, respectively. Furthermore, we discussed the mechanism of fluorescence quenching which is caused by the interaction between H2O2 and Cu nanoclusters. This sensing system has been applied successfully to the detection of glucose in human serum samples.
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Affiliation(s)
- Yu Ling
- Key Laboratory of Eco-Environments in Three Gorges Reservoir Region (Ministry of Education), School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
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16
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Adamczyk-Woźniak A, Borys KM, Czerwińska K, Gierczyk B, Jakubczyk M, Madura ID, Sporzyński A, Tomecka E. Intramolecular interactions in ortho-methoxyalkylphenylboronic acids and their catechol esters. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 116:616-621. [PMID: 23978747 DOI: 10.1016/j.saa.2013.07.091] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2013] [Revised: 07/18/2013] [Accepted: 07/28/2013] [Indexed: 06/02/2023]
Abstract
Catechol esters of ortho-methoxyalkylphenylboronic acids have been synthesized and characterized by (17)O NMR spectroscopy. The results were compared with the data for the parent acids. The influence of intramolecular and intermolecular hydrogen bonds on the properties of the boronic acids has been discussed. The (17)O NMR data for the boronic esters proved that there are no O → B interactions in the investigated compounds. This fact is connected with weak Lewis acidity of the parent acids and their low sugars' receptors activity. Crystal structure of ortho-methoxyphenylboronic acid catechol ester was determined.
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17
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Hickey JL, Lim S, Hayne DJ, Paterson BM, White JM, Villemagne VL, Roselt P, Binns D, Cullinane C, Jeffery CM, Price RI, Barnham KJ, Donnelly PS. Diagnostic imaging agents for Alzheimer's disease: copper radiopharmaceuticals that target Aβ plaques. J Am Chem Soc 2013; 135:16120-32. [PMID: 24070589 DOI: 10.1021/ja4057807] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
One of the pathological hallmarks of Alzheimer's disease is the presence of amyloid-β plaques in the brain and the major constituent of these plaques is aggregated amyloid-β peptide. New thiosemicarbazone-pyridylhydrazine based ligands that incorporate functional groups designed to bind amyloid-β plaques have been synthesized. The new ligands form stable four coordinate complexes with a positron-emitting radioactive isotope of copper, (64)Cu. Two of the new Cu(II) complexes include a functionalized styrylpyridine group and these complexes bind to amyloid-β plaques in samples of post-mortem human brain tissue. Strategies to increase brain uptake by functional group manipulation have led to a (64)Cu complex that effectively crosses the blood-brain barrier in wild-type mice. The new complexes described in this manuscript provide insight into strategies to deliver metal complexes to amyloid-β plaques.
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Affiliation(s)
- James L Hickey
- School of Chemistry, ‡Bio21 Molecular Science and Biotechnology Institute, §Florey Institute of Neuroscience and Mental Health, □Department of Pharmacology, and ∥Department of Pathology, University of Melbourne, Parkville , Melbourne, Victoria, 3010, Australia
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18
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Challier L, Miranda-Castro R, Marchal D, Noël V, Mavré F, Limoges B. Kinetic Rotating Droplet Electrochemistry: A Simple and Versatile Method for Reaction Progress Kinetic Analysis in Microliter Volumes. J Am Chem Soc 2013; 135:14215-28. [DOI: 10.1021/ja405415q] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Lylian Challier
- ITODYS, UMR 7086 CNRS, and ‡Laboratoire d’Electrochimie Moléculaire,
UMR 7591 CNRS, Université Paris Diderot, Sorbonne Paris Cité, 15 rue Jean-Antoine de Baïf, F-75205 Paris Cedex 13, France
| | - Rebeca Miranda-Castro
- ITODYS, UMR 7086 CNRS, and ‡Laboratoire d’Electrochimie Moléculaire,
UMR 7591 CNRS, Université Paris Diderot, Sorbonne Paris Cité, 15 rue Jean-Antoine de Baïf, F-75205 Paris Cedex 13, France
| | - Damien Marchal
- ITODYS, UMR 7086 CNRS, and ‡Laboratoire d’Electrochimie Moléculaire,
UMR 7591 CNRS, Université Paris Diderot, Sorbonne Paris Cité, 15 rue Jean-Antoine de Baïf, F-75205 Paris Cedex 13, France
| | - Vincent Noël
- ITODYS, UMR 7086 CNRS, and ‡Laboratoire d’Electrochimie Moléculaire,
UMR 7591 CNRS, Université Paris Diderot, Sorbonne Paris Cité, 15 rue Jean-Antoine de Baïf, F-75205 Paris Cedex 13, France
| | - François Mavré
- ITODYS, UMR 7086 CNRS, and ‡Laboratoire d’Electrochimie Moléculaire,
UMR 7591 CNRS, Université Paris Diderot, Sorbonne Paris Cité, 15 rue Jean-Antoine de Baïf, F-75205 Paris Cedex 13, France
| | - Benoît Limoges
- ITODYS, UMR 7086 CNRS, and ‡Laboratoire d’Electrochimie Moléculaire,
UMR 7591 CNRS, Université Paris Diderot, Sorbonne Paris Cité, 15 rue Jean-Antoine de Baïf, F-75205 Paris Cedex 13, France
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19
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Hagemeier J, Geurts JJG, Zivadinov R. Brain iron accumulation in aging and neurodegenerative disorders. Expert Rev Neurother 2013; 12:1467-80. [PMID: 23237353 DOI: 10.1586/ern.12.128] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Over the decades, various studies have established an association between accumulation of iron and both aging and neurodegenerative disorders such as Alzheimer's disease and Parkinson's disease. Excess levels of iron can lead to increased oxidative stress through Fenton chemistry, and depletion of iron can similarly have deleterious effects. In addition, metal ions are known to be involved in both Alzheimer's disease and Parkinson's disease protein aggregation. Metal ion chelators have been extensively investigated in preclinical models, and may prove to be appropriate for modulating brain iron levels in age-related neurodegenerative disorders. Investigating age-related iron deposition is vital, and can possibly aid in determining at-risk groups and diagnosing neurodegenerative diseases at an early stage. Novel imaging methods have enabled researchers to examine iron deposition in vivo, and offer a noninvasive method of monitoring the progression of accumulation, and possible therapeutic effects of chelating compounds.
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Affiliation(s)
- Jesper Hagemeier
- Buffalo Neuroimaging Analysis Center, Department of Neurology, University at Buffalo, 100 High Street, Buffalo, NY 14203, USA
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20
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Yang GH, Zhou YH, Wu JJ, Cao JT, Li LL, Liu HY, Zhu JJ. Microwave-assisted synthesis of nitrogen and boron co-doped graphene and its application for enhanced electrochemical detection of hydrogen peroxide. RSC Adv 2013. [DOI: 10.1039/c3ra44284e] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
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21
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A boronate prochelator built on a triazole framework for peroxide-triggered tridentate metal binding. Inorganica Chim Acta 2012; 393:294-303. [PMID: 23439614 DOI: 10.1016/j.ica.2012.06.011] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Iron chelating agents have the potential to minimize damage associated with oxidative stress in a range of diseases; however, this potential is countered by risks of indiscriminant metal binding or iron depletion in conditions not associated with systemic iron overload. Deferasirox is a chelator used clinically for iron overload, but also is cytotoxic to cells in culture. In order to test whether a prodrug version of deferasirox could minimize its cytotoxicity but retain its protective properties against iron-induced oxidative damage, we synthesized a prochelator that contains a self-immolative boronic ester masking group that is removed upon exposure to hydrogen peroxide to release the bis-hydroxyphenyltriazole ligand deferasirox. We present here the synthesis and characterization of this triazole-based, self-immolative prochelator: TIP (4-(5-(2-((4-boronobenzyl)oxy)phenyl)-3-(2-hydroxyphenyl)-1H-1,2,4-triazol-1-yl)benzoic acid). TIP does not coordinate to Fe(3+) and shows only weak affinity for Cu(2+) or Zn(2+), in stark contrast to deferasirox, which avidly binds all three metal ions. TIP converts efficiently in vitro upon reaction with hydrogen peroxide to deferasirox. In cell culture, TIP protects retinal pigment epithelial cells from death induced by hydrogen peroxide; however, TIP itself is more cytotoxic than deferasirox in unstressed cells. These results imply that the cytotoxicity of deferasirox may not derive exclusively from its iron withholding properties.
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Oh WK, Jeong YS, Kim S, Jang J. Fluorescent polymer nanoparticle for selective sensing of intracellular hydrogen peroxide. ACS NANO 2012; 6:8516-8524. [PMID: 22971112 DOI: 10.1021/nn204899m] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Fluorescent boronate-modified polyacrylonitrile (BPAN) nanoparticles of 50 nm diameter were fabricated for use as a selective H(2)O(2) sensor. The fluorescence intensity changed and an emission peak shifted when BPAN nanoparticles selectively interacted with H(2)O(2), relative to other reactive oxygen species (ROS). The BPAN nanoparticles undergo photoinduced electron transfer (PET) between a Schiff base moiety and boronate, which enhances the fluorescence and makes the nanoparticles suitable for selective ROS recognition. We demonstrate the use of these nanoparticles as a detector of endogenous H(2)O(2) produced in living cells. The representative features of the fluorescent BPAN nanoparticles that make them particularly attractive for H(2)O(2) and ROS detection are the following: they are easily synthesized as PET sensors; they exhibit a characteristic emission peak and peak shift that distinguishes reaction with H(2)O(2) from other ROS; and compared to organic compounds, the sensing moiety on BPAN polymer nanoparticles is more thermally stable and has superior mechanical properties, enabling their use in various biomedical applications.
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Affiliation(s)
- Wan-Kyu Oh
- World Class University (WCU) Program of Chemical Convergence for Energy & Environment (C2E2), School of Chemical & Biological Engineering, Seoul National University, 599 Gwanangro, Gwanak-gu, Seoul 151-742, Korea
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23
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Neff C, Bellot F, Waern JB, Lambert F, Brandel J, Serratrice G, Gaboriau F, Policar C. Glycosiderophores: Synthesis of tris-hydroxamate siderophores based on a galactose or glycero central scaffold, Fe(III) complexation studies. J Inorg Biochem 2012; 112:59-67. [DOI: 10.1016/j.jinorgbio.2012.02.030] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2011] [Revised: 02/27/2012] [Accepted: 02/28/2012] [Indexed: 10/28/2022]
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24
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Hyman LM, Franz KJ. A Cell-Permeable Fluorescent Prochelator Responds to Hydrogen Peroxide and Metal Ions by Decreasing Fluorescence. Inorganica Chim Acta 2012; 380:125-134. [PMID: 22287796 DOI: 10.1016/j.ica.2011.11.056] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Described here is the development of two boronic ester-based fluorescent prochelators, FloB (2-(6-hydroxy-3-oxo-3H-xanthen-9-yl)-4(5)-[2-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-benzylidene-hydrazinocarbonyl]-benzoic acid) and FloB-SI (2-(6-hydroxy-3-oxo-3Hxanthen-9-yl)-4(5)-[2-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzyloxy)-benzylidene-hydrazinocarbonyl]-benzoic acid) that show a fluorescence response to a variety of transition metal ions only after reaction with H(2)O(2). Both prochelators' boronic ester masks are oxidized by H(2)O(2) to reveal a fluorescein-tagged metal chelator, FloS (4(5)-(2-hydroxy-benzylidenehydrazinocarbonyl)-2-(6-hydroxy-3-oxo-3H-xanthen-9-yl)-benzoic acid). Chelation of Fe(3+) or Cu(2+) elicits a 70% decrease in the emission signal of FloS, while Zn(2+), Ni(2+), and Co(2+) produce a more modest fluorescence decrease. The conversion of FloB to FloS proceeds in organic solvents, but hydrolytic decomposition of its hydrazone backbone is observed in aqueous solution. However, FloB-SI oxidizes cleanly with H(2)O(2) within 1 h in aqueous solutions to produce FloS. Fluorescence microscopy studies in HeLa cells with FloB-SI show that the sensor's fluorescence intensity remains unchanged until incubation with exogenous H(2)O(2), which results in a decreased fluorescent signal. Incubation with a competitive chelator restores the emission response, thus suggesting that FloB-SI can effectively report on a H(2)O(2)-induced increase in intracellular labilized metal.
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Affiliation(s)
- Lynne M Hyman
- Department of Chemistry, Duke University, Durham, NC 27708
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