1
|
Ma L, Zheng JJ, Zhou N, Zhang R, Fang L, Yang Y, Gao X, Chen C, Yan X, Fan K. A natural biogenic nanozyme for scavenging superoxide radicals. Nat Commun 2024; 15:233. [PMID: 38172125 PMCID: PMC10764798 DOI: 10.1038/s41467-023-44463-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: 05/06/2023] [Accepted: 12/14/2023] [Indexed: 01/05/2024] Open
Abstract
Biominerals, the inorganic minerals of organisms, are known mainly for their physical property-related functions in modern living organisms. Our recent discovery of the enzyme-like activities of nanomaterials, coined as nanozyme, inspires the hypothesis that nano-biominerals might function as enzyme-like catalyzers in cells. Here we report that the iron cores of biogenic ferritins act as natural nanozymes to scavenge superoxide radicals. Through analyzing eighteen representative ferritins from three living kingdoms, we find that the iron core of prokaryote ferritin possesses higher superoxide-diminishing activity than that of eukaryotes. Further investigation reveals that the differences in catalytic capability result from the iron/phosphate ratio changes in the iron core, which is mainly determined by the structures of ferritins. The phosphate in the iron core switches the iron core from single crystalline to amorphous iron phosphate-like structure, resulting in decreased affinity to the hydrogen proton of the ferrihydrite-like core that facilitates its reaction with superoxide in a manner different from that of ferric ions. Furthermore, overexpression of ferritins with high superoxide-diminishing activities in E. coli increases the resistance to superoxide, whereas bacterioferritin knockout or human ferritin knock-in diminishes free radical tolerance, highlighting the physiological antioxidant role of this type of nanozymes.
Collapse
Affiliation(s)
- Long Ma
- CAS Engineering Laboratory for Nanozyme, Key Laboratory of Biomacromolecules (CAS), CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China
- University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, 100408, China
| | - Jia-Jia Zheng
- Laboratory of Theoretical and Computational Nanoscience, National Center for Nanoscience and Technology of China, Beijing, 100190, China
| | - Ning Zhou
- CAS Engineering Laboratory for Nanozyme, Key Laboratory of Biomacromolecules (CAS), CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China
| | - Ruofei Zhang
- CAS Engineering Laboratory for Nanozyme, Key Laboratory of Biomacromolecules (CAS), CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China
| | - Long Fang
- CAS Engineering Laboratory for Nanozyme, Key Laboratory of Biomacromolecules (CAS), CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China
- Savaid Medical School, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yili Yang
- China Regional Research Centre, International Centre for Genetic Engineering and Biotechnology, Taizhou, Jiangsu, 225316, China
| | - Xingfa Gao
- Laboratory of Theoretical and Computational Nanoscience, National Center for Nanoscience and Technology of China, Beijing, 100190, China
| | - Chunying Chen
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety and CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, China
| | - Xiyun Yan
- CAS Engineering Laboratory for Nanozyme, Key Laboratory of Biomacromolecules (CAS), CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China.
- University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, 100408, China.
- Nanozyme Medical Center, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, Henan, 450052, China.
- Nanozyme Laboratory in Zhongyuan, Zhengzhou, Henan, 451163, China.
| | - Kelong Fan
- CAS Engineering Laboratory for Nanozyme, Key Laboratory of Biomacromolecules (CAS), CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China.
- University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, 100408, China.
- Nanozyme Medical Center, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, Henan, 450052, China.
- Nanozyme Laboratory in Zhongyuan, Zhengzhou, Henan, 451163, China.
| |
Collapse
|
2
|
Inertness of Superoxide Dismutase Mimics Mn(II) Complexes Based on an Open-Chain Ligand, Bioactivity, and Detection in Intestinal Epithelial Cells. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:3858122. [PMID: 35401918 PMCID: PMC8993562 DOI: 10.1155/2022/3858122] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 01/03/2022] [Accepted: 01/29/2022] [Indexed: 12/22/2022]
Abstract
Oxidative stress is known to play a major role in the pathogenesis of inflammatory bowel diseases (IBDs), and, in particular, superoxide dismutase (SODs) defenses were shown to be weakened in patients suffering from IBDs. SOD mimics, also called SOD mimetics, as low-molecular-weight complexes reproducing the activity of SOD, constitute promising antioxidant catalytic metallodrugs in the context of IBDs. A Mn(II) complex SOD mimic (Mn1) based on an open-chain diaminoethane ligand exerting antioxidant and anti-inflammatory effects on an intestinal epithelial cellular model was shown to experience metal exchanges between the manganese center and metal ions present in the biological environment (such as Zn(II)) to some degrees. As the resulting complexes (mainly Zn(II)) were shown to be inactive, improving the kinetic inertness of Mn(II) complexes based on open-chain ligands is key to improve their bioactivity in a cellular context. We report here the study of three new Mn(II) complexes resulting from Mn1 functionalization with a cyclohexyl and/or a propyl group meant to limit, respectively, (a) metal exchanges and (b) deprotonation of an amine from the 1,2-diaminoethane central scaffold. The new manganese-based SOD mimics display a higher intrinsic SOD activity and also improved kinetic inertness in metal ion exchange processes (with Zn(II), Cu(II), Ni(II), and Co(II)). They were shown to provide anti-inflammatory and antioxidant effects in cells at lower doses than Mn1 (down to 10 μM). This improvement was due to their higher inertness against metal-assisted dissociation and not to different cellular overall accumulations. Based on its higher inertness, the SOD mimic containing both the propyl and the cyclohexyl moieties was suitable for intracellular detection and quantification by mass spectrometry, quantification, that was achieved by using a 13C-labeled Co-based analog of the SOD mimics as an external heavy standard.
Collapse
|
3
|
Mixed-ligand manganese(II) complexes with 5-phenyltetrazole and polypyridine derivatives: Synthesis, crystal structures and biological activity. RESULTS IN CHEMISTRY 2021. [DOI: 10.1016/j.rechem.2021.100239] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
|
4
|
Mathieu E, Tolbert AE, Koebke KJ, Tard C, Iranzo O, Penner-Hahn JE, Policar C, Pecoraro V. Rational De Novo Design of a Cu Metalloenzyme for Superoxide Dismutation. Chemistry 2020; 26:249-258. [PMID: 31710732 PMCID: PMC6944188 DOI: 10.1002/chem.201903808] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Revised: 10/04/2019] [Indexed: 01/16/2023]
Abstract
Superoxide dismutases (SODs) are highly efficient enzymes for superoxide dismutation and the first line of defense against oxidative stress. These metalloproteins contain a redox-active metal ion in their active site (Mn, Cu, Fe, Ni) with a tightly controlled reduction potential found in a close range around the optimal value of 0.36 V versus the normal hydrogen electrode (NHE). Rationally designed proteins with well-defined three-dimensional structures offer new opportunities for obtaining functional SOD mimics. Here, we explore four different copper-binding scaffolds: H3 (His3 ), H4 (His4 ), H2 DH (His3 Asp with two His and one Asp in the same plane) and H3 D (His3 Asp with three His in the same plane) by using the scaffold of the de novo protein GRα3 D. EPR and XAS analysis of the resulting copper complexes demonstrates that they are good CuII -bound structural mimics of Cu-only SODs. Furthermore, all the complexes exhibit SOD activity, though three orders of magnitude slower than the native enzyme, making them the first de novo copper SOD mimics.
Collapse
Affiliation(s)
- Emilie Mathieu
- Laboratoire des biomolécules, LBM, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, 75005 Paris, France
- These authors contributed equally to this work
| | - Audrey E. Tolbert
- Department of Chemistry, University of Michigan, Ann Arbor, MI 48103
- These authors contributed equally to this work
| | - Karl J. Koebke
- Department of Chemistry, University of Michigan, Ann Arbor, MI 48103
| | - Cédric Tard
- LCM, CNRS, Ecole Polytechnique, IP Paris, F-91128 Palaiseau, France
| | - Olga Iranzo
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille, France
| | | | - Clotilde Policar
- Laboratoire des biomolécules, LBM, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, 75005 Paris, France
| | - Vincent Pecoraro
- Department of Chemistry, University of Michigan, Ann Arbor, MI 48103
| |
Collapse
|
5
|
The new O,O and N,O type ligands and their Cu(II) and Ni(II) complexes: Crystal structure, absorption-emission properties and superoxide dismutase mimetic studies. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2017.03.022] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
6
|
Ali B, Iqbal MA. Coordination Complexes of Manganese and Their Biomedical Applications. ChemistrySelect 2017. [DOI: 10.1002/slct.201601909] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Basharat Ali
- Department of Chemistry; University of Agriculture; Faisalabad- 38040 Punjab-Pakistan
| | - Muhammad Adnan Iqbal
- Department of Chemistry; University of Agriculture; Faisalabad- 38040 Punjab-Pakistan
- UAF Community College; University of Agriculture; Faisalabad- 38040 Punjab-Pakistan
| |
Collapse
|
7
|
|
8
|
Abstract
Evolution has favored the utilization of dioxygen (O2) in the development of complex multicellular organisms. O2 is actually a toxic mutagenic gas that is highly oxidizing and combustible. It is thought that plants are largely to blame for polluting the earth's atmosphere with O2 owing to the development of photosynthesis by blue-green algae over 2 billion years ago. The rise of the plants and atmospheric O2 levels placed evolutionary stress on organisms to adapt or become extinct. This implies that all the surviving creatures on our planet are mutants that have adapted to the "abnormal biology" of O2. Much of the adaptation to the presence of O2 in biological systems comes from well-coordinated antioxidant and repair systems that focus on converting O2 to its most reduced form, water (H2O), and the repair and replacement of damaged cellular macromolecules. Biological systems have also harnessed O2's reactive properties for energy production, xenobiotic metabolism, and host defense and as a signaling messenger and redox modulator of a number of cell signaling pathways. Many of these systems involve electron transport systems and offer many different mechanisms by which antioxidant therapeutics can alternatively produce an antioxidant effect without directly scavenging oxygen-derived reactive species. It is likely that each agent will have a different set of mechanisms that may change depending on the model of oxidative stress, organ system, or disease state. An important point is that all biological processes of aerobes have coevolved with O2 and this creates a Pandora's box for trying to understand the mechanism(s) of action of antioxidants being developed as therapeutic agents.
Collapse
Affiliation(s)
- Brian J Day
- Department of Medicine, National Jewish Health, Denver, CO 80206, USA.
| |
Collapse
|
9
|
Wuttig K, Heller MI, Croot PL. Reactivity of inorganic Mn and Mn desferrioxamine B with O2, O2(-), and H2O2 in seawater. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2013; 47:10257-65. [PMID: 23915142 DOI: 10.1021/es4016603] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Manganese (Mn) is a required element for oceanic phytoplankton as it plays a critical role in photosynthesis, through its unique redox chemistry, as the active site in photosystem II, and in enzymes that act as defenses against reactive oxygen species (ROS), most notably for protection against superoxide (O2(-)), through the action of superoxide dismutase (SOD), and against hydrogen peroxide (H2O2) via peroxidases and catalases. The distribution and redox speciation of Mn in the ocean is also apparently controlled by reactions with ROS. Here we examine the connections between ROS and dissolved Mn species in the upper ocean using field and laboratory experimental data. Our results suggest it is unlikely that significant concentrations of Mn(III) are produced in the euphotic zone, as in the absence of evidence for the existence of strong Mn(III) ligands, Mn(II) reacts with O2(-) to form the short-lived transient manganous superoxide, MnO2(+), which may react rapidly with other redox species in a manner similar to O2(-). Experiments with the strong Mn(III) chelator, desferrioxamine B (DFB), in seawater indicated that the Mn(III) species are unlikely to form, as formation of the precursor Mn(II) complex is hindered due to the stability of the Ca complex with DFB.
Collapse
Affiliation(s)
- Kathrin Wuttig
- GEOMAR Helmholtz Centre for Ocean Research Kiel , Marine Biogeochemistry, Düsternbrooker Weg 20, 24105 Kiel, Germany
| | | | | |
Collapse
|
10
|
Reactive oxygen species (ROS) and sensitization to TRAIL-induced apoptosis, in Bayesian network modelling of HeLa cell response to LY303511. Biochem Pharmacol 2012; 84:1307-17. [DOI: 10.1016/j.bcp.2012.08.028] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2012] [Revised: 08/29/2012] [Accepted: 08/30/2012] [Indexed: 11/24/2022]
|
11
|
Biologically relevant mechanism for catalytic superoxide removal by simple manganese compounds. Proc Natl Acad Sci U S A 2012; 109:6892-7. [PMID: 22505740 DOI: 10.1073/pnas.1203051109] [Citation(s) in RCA: 119] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Nonenzymatic manganese was first shown to provide protection against superoxide toxicity in vivo in 1981, but the chemical mechanism responsible for this protection subsequently became controversial due to conflicting reports concerning the ability of Mn to catalyze superoxide disproportionation in vitro. In a recent communication, we reported that low concentrations of a simple Mn phosphate salt under physiologically relevant conditions will indeed catalyze superoxide disproportionation in vitro. We report now that two of the four Mn complexes that are expected to be most abundant in vivo, Mn phosphate and Mn carbonate, can catalyze superoxide disproportionation at physiologically relevant concentrations and pH, whereas Mn pyrophosphate and citrate complexes cannot. Additionally, the chemical mechanisms of these reactions have been studied in detail, and the rates of reactions of the catalytic removal of superoxide by Mn phosphate and carbonate have been modeled. Physiologically relevant concentrations of these compounds were found to be sufficient to mimic an effective concentration of enzymatic superoxide dismutase found in vivo. This mechanism provides a likely explanation as to how Mn combats superoxide stress in cellular systems.
Collapse
|
12
|
Friedel FC, Lieb D, Ivanović-Burmazović I. Comparative studies on manganese-based SOD mimetics, including the phosphate effect, by using global spectral analysis. J Inorg Biochem 2012; 109:26-32. [DOI: 10.1016/j.jinorgbio.2011.12.008] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2011] [Revised: 12/22/2011] [Accepted: 12/25/2011] [Indexed: 11/15/2022]
|
13
|
IvanoviĆ-BurmazoviĆ I, FilipoviĆ MR. Reactivity of manganese superoxide dismutase mimics toward superoxide and nitric oxide. ADVANCES IN INORGANIC CHEMISTRY 2012. [DOI: 10.1016/b978-0-12-396462-5.00003-9] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
|
14
|
Iranzo O. Manganese complexes displaying superoxide dismutase activity: A balance between different factors. Bioorg Chem 2011; 39:73-87. [DOI: 10.1016/j.bioorg.2011.02.001] [Citation(s) in RCA: 115] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2010] [Revised: 02/14/2011] [Accepted: 02/14/2011] [Indexed: 01/05/2023]
|
15
|
Spitz DR, Oberley LW. Measurement of MnSOD and CuZnSOD activity in mammalian tissue homogenates. ACTA ACUST UNITED AC 2011; Chapter 7:Unit7.5. [PMID: 20954153 DOI: 10.1002/0471140856.tx0705s08] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Three basic forms of mammalian SODs exist and they are distinguished by their sizes and locations. SOD enzyme activity is not easily monitored by direct measurement because the substrate disappearance is very rapid at physiological pH. Activity can be measured as described in this unit by a number of indirect competitive inhibition assays based on the principle that the superoxide anion radical will reduce an inhibitory substrate [such as nitroblue tetrazolium (NBT) or cytochrome c] and SOD activity will reduce the rate of reduction in a competitive fashion. The SOD-mediated inhibition of the indicator substrate reduction can then be quantitated and plotted as a function of the quantity of protein added to the reaction to construct an inhibition curve.
Collapse
Affiliation(s)
- D R Spitz
- University of Iowa, Iowa City, Iowa, USA
| | | |
Collapse
|
16
|
Kripli B, Baráth G, Balogh-Hergovich É, Giorgi M, Simaan AJ, Párkányi L, Pap JS, Kaizer J, Speier G. Correlation between the SOD-like activity of hexacoordinate iron(II) complexes and their Fe3+/Fe2+ redox potentials. INORG CHEM COMMUN 2011. [DOI: 10.1016/j.inoche.2010.10.023] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
17
|
Measurement of superoxide dismutase, catalase and glutathione peroxidase in cultured cells and tissue. Nat Protoc 2009; 5:51-66. [PMID: 20057381 DOI: 10.1038/nprot.2009.197] [Citation(s) in RCA: 812] [Impact Index Per Article: 54.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Cells contain a large number of antioxidants to prevent or repair the damage caused by reactive oxygen species, as well as to regulate redox-sensitive signaling pathways. General protocols are described to measure the antioxidant enzyme activity of superoxide dismutase (SOD), catalase and glutathione peroxidase. The SODs convert superoxide radical into hydrogen peroxide and molecular oxygen, whereas the catalase and peroxidases convert hydrogen peroxide into water. In this way, two toxic species, superoxide radical and hydrogen peroxide, are converted to the harmless product water. Western blots, activity gels and activity assays are various methods used to determine protein and activity in both cells and tissue depending on the amount of protein required for each assay. Other techniques including immunohistochemistry and immunogold can further evaluate the levels of the various antioxidant enzymes in tissues and cells. In general, these assays require 24-48 h to complete.
Collapse
|
18
|
Shearer J, Neupane KP, Callan PE. Metallopeptide based mimics with substituted histidines approximate a key hydrogen bonding network in the metalloenzyme nickel superoxide dismutase. Inorg Chem 2009; 48:10560-71. [PMID: 19894770 PMCID: PMC2778858 DOI: 10.1021/ic9010407] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Nickel superoxide dismutase (NiSOD) is a recently discovered superoxide dismutase that utilizes the Ni(III)/Ni(II) couple to facilitate the disproportionation of O(2)(*-) into H(2)O(2) and O(2). A key structural component of NiSOD is an elongated axial His-imidazole Ni(III) bond (2.3-2.6 A) that is the result of a H-bonding network between His(1), Glu(17), and Arg(47). Herein we utilize metallopeptide based mimics of NiSOD with His(1) epsilon-nitrogen substituted imidazoles to approximate the electronic influence of this H-bonding network ({Ni(III/II)(SOD(M1)-Im-X)} X = Me, H, DNP, and Tos; SOD(M1)-Im-X = H'CDLPCGVYDPA where H' is an N-substituted His). All reduced {Ni(II)(SOD(M1)-Im-X)} are similar to one another as assessed by electronic absorption spectroscopy, circular dichroism (CD) spectroscopy, and Ni K-edge x-ray absorption (XAS). This indicates that the change in His(1) is having little influence on the square-planar Ni(II)N(2)S(2) center. In contrast, changes to the axial His(1) ligand impart differential spectroscopic properties on the oxidized {Ni(III)(SOD(M1)-Im-X)} metallopeptides. Resonance Raman spectroscopy (405 nm excitation) in conjunction with a normal coordinate analysis indicates that as the axial His imidazole is made less Lewis basic there is an increase in Ni(III)-S bond strength in the equatorial plane, with force constants for the Ni-S bond trans to the amine ranging from 1.54 to 1.70 mdyn A(-1). The rhombic electron paramagnetic resonance (EPR) spectra of the four oxidized metallopeptides are all consistent with low-spin Ni(III) contained in a square pyramidal coordination environment, but show changes in the hyperfine coupling to (14)N along g(z). This is attributable to a reorientation of the g(z) vector in the more (along the Ni(III)-N(imidazole) bond) versus less (along the S-Ni(III)-N(amine) bond) Lewis basic imidazole bases. This reorientation of g(z) along the xy plane translates into a decrease in A(zz) by approximately 20 MHz. A decrease in Lewis-basicity of the axial imidazole also translates into a 2 orders of magnitude increase in SOD catalysis across the metallopeptide series, with k(cat) ranging from 6(1) x 10(6) M(-1) s(-1) for the metallopeptide with the most Lewis basic imidazole to 6(2) x 10(8) M(-1) s(-1) for the metallopeptide with the least basic imidazole. This likely results from a fine-tuning of the electron transfer properties of the Ni-center, which optimize it for SOD catalysis.
Collapse
Affiliation(s)
- Jason Shearer
- Department of Chemistry, University of Nevada, Reno, Nevada 89557, USA.
| | | | | |
Collapse
|
19
|
Pantcheva IN, Dorkov P, Atanasov VN, Mitewa M, Shivachev BL, Nikolova RP, Mayer-Figge H, Sheldrick WS. Crystal structure and properties of the copper(II) complex of sodium monensin A. J Inorg Biochem 2009; 103:1419-24. [PMID: 19748125 DOI: 10.1016/j.jinorgbio.2009.08.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2008] [Revised: 05/06/2009] [Accepted: 05/07/2009] [Indexed: 11/30/2022]
Abstract
The preparation and structural characterization of a new copper(II) complex of the polyether ionophorous antibiotic sodium monensin A (MonNa) are described. Sodium monensin A binds Cu(II) to produce a heterometallic complex of composition [Cu(MonNa)(2)Cl(2)].H(2)O, 1. The crystallographic data of 1 show that the complex crystallizes in monoclinic space group C2 with Cu(II) ion adopting a distorted square-planar geometry. Copper(II) coordinates two anionic sodium monensin ligands and two chloride anions producing a neutral compound. The sodium ion remains in the inner cavity of the ligand retaining its sixfold coordination with oxygen atoms. Replacement of crystallization water by acetonitrile is observed in the crystal structure of the complex 1. Copper(I) salt of the methyl ester of MonNa, 2, was identified by X-ray crystallography as a side product of the reaction of MonNa with Cu(II). Compound 2, [Me-MonNa][H-MonNa][CuCl(2)]Cl, crystallizes in monoclinic space group C2 with the same coordination pattern of the sodium cation but contains a chlorocuprate(I) counter [CuCl(2)](-), which is linear and not coordinated by sodium monensin A. The antibacterial and antioxidant properties as two independent activities of 1 were studied. Compound 1 is effective against aerobic Gram(+)-microorganisms Bacillus subtilis, Bacillus mycoides and Sarcina lutea. Complex 1 shows SOD-like activity comparable with that of the copper(II) ion.
Collapse
Affiliation(s)
- Ivayla N Pantcheva
- Department of Analytical Chemistry, Faculty of Chemistry, Sofia University, 1, J. Bourchier Blvd., 1164 Sofia, Bulgaria
| | | | | | | | | | | | | | | |
Collapse
|
20
|
Eckshtain M, Zilbermann I, Mahammed A, Saltsman I, Okun Z, Maimon E, Cohen H, Meyerstein D, Gross Z. Superoxide dismutase activity of corrole metal complexes. Dalton Trans 2009:7879-82. [PMID: 19771348 DOI: 10.1039/b911278b] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first report regarding SOD activity of metallocorroles, investigated via the combination of the cytochrome C assay, pulse radiolysis, and electrochemistry, is used for identifying the main criteria needed for achieving good performance, as well as for elucidating mechanistic aspects of their action.
Collapse
Affiliation(s)
- Meital Eckshtain
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa, 32000, Israel
| | | | | | | | | | | | | | | | | |
Collapse
|
21
|
Jiang F, Drummond GR, Dusting GJ. Suppression of Oxidative Stress in the Endothelium and Vascular Wall. ACTA ACUST UNITED AC 2009; 11:79-88. [PMID: 15370067 DOI: 10.1080/10623320490482600] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
There is growing evidence that oxidative stress, meaning an excessive production of reactive oxygen and nitrogen species, underlies many forms of cardiovascular disease. The major source of oxidative stress in the artery wall is an NADPH oxidase. This enzyme complex in vascular cells, including endothelium, differs from that in phagocytic leucocytes in both biochemical structure and functions. The crucial flavin-containing catalytic subunits Nox1 and Nox4 are not present in leucocytes, but are highly expressed in vascular cells and upregulated in vascular remodeling, such as that found in hypertension and atherosclerosis. This offers the opportunity to develop "vascular specific" NADPH oxidase inhibitors that do not compromise the essential physiological signaling and phagocytic function carried out by reactive oxygen and nitrogen molecules. Although many conventional antioxidants fail to significantly affect outcomes in cardiovascular disease, targeted inhibitors of NADPH oxidase that block the source of oxidative stress in the vasculature are more likely to prevent the deterioration of vascular function that leads to stroke and heart attack.
Collapse
Affiliation(s)
- Fan Jiang
- Howard Florey Institute, University of Melbourne, Victoria, Australia
| | | | | |
Collapse
|
22
|
Speisky H, Gómez M, Burgos-Bravo F, López-Alarcón C, Jullian C, Olea-Azar C, Aliaga ME. Generation of superoxide radicals by copper–glutathione complexes: Redox-consequences associated with their interaction with reduced glutathione. Bioorg Med Chem 2009; 17:1803-10. [DOI: 10.1016/j.bmc.2009.01.069] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2008] [Revised: 01/27/2009] [Accepted: 01/30/2009] [Indexed: 10/21/2022]
|
23
|
Wilcox CS, Pearlman A. Chemistry and antihypertensive effects of tempol and other nitroxides. Pharmacol Rev 2009; 60:418-69. [PMID: 19112152 DOI: 10.1124/pr.108.000240] [Citation(s) in RCA: 290] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Nitroxides can undergo one- or two-electron reduction reactions to hydroxylamines or oxammonium cations, respectively, which themselves are interconvertible, thereby providing redox metabolic actions. 4-Hydroxy-2,2,6,6-tetramethylpiperidine-N-oxyl (tempol) is the most extensively studied nitroxide. It is a cell membrane-permeable amphilite that dismutates superoxide catalytically, facilitates hydrogen peroxide metabolism by catalase-like actions, and limits formation of toxic hydroxyl radicals produced by Fenton reactions. It is broadly effective in detoxifying these reactive oxygen species in cell and animal studies. When administered intravenously to hypertensive rodent models, tempol caused rapid and reversible dose-dependent reductions in blood pressure in 22 of 26 studies. This was accompanied by vasodilation, increased nitric oxide activity, reduced sympathetic nervous system activity at central and peripheral sites, and enhanced potassium channel conductance in blood vessels and neurons. When administered orally or by infusion over days or weeks to hypertensive rodent models, it reduced blood pressure in 59 of 68 studies. This was accompanied by correction of salt sensitivity and endothelial dysfunction and reduced agonist-evoked oxidative stress and contractility of blood vessels, reduced renal vascular resistance, and increased renal tissue oxygen tension. Thus, tempol is broadly effective in reducing blood pressure, whether given by acute intravenous injection or by prolonged administration, in a wide range of rodent models of hypertension.
Collapse
Affiliation(s)
- Christopher S Wilcox
- Division of Nephrology and Hypertension, Kidney and Vascular Disorder Center, Georgetown University, Washington, DC 20007, USA.
| | | |
Collapse
|
24
|
Schmidt M, Zahn S, Carella M, Ohlenschläger O, Görlach M, Kothe E, Weston J. Solution structure of a functional biomimetic and mechanistic implications for nickel superoxide dismutases. Chembiochem 2009; 9:2135-46. [PMID: 18690655 DOI: 10.1002/cbic.200800017] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The nickel complex of a synthetic nonapeptide (HCDLPCFVY-NH2) is capable of catalytically disproportionating O2(.-) and is thus a functional biomimetic for nickel superoxide dismutases. This represents a simplification as compared to a NiSOD "maquette" that is based on a dodecapeptide that was recently reported [Inorg. Chem. 2006, 45, 2358]. The 3D solution structure reveals that the first six residues form a stable macrocyclic structure with a preformed binding site for Ni(II). Proline 5 exhibits a trans peptide linkage in the biomimetic and a cis conformation in NiSOD enzymes. DFT calculations reveal the source of this preference. Mechanistic consequences for the mode of action (identity of the fifth ligand) are discussed. The SOD activity is compared to enzymatic systems, and selected modifications allowed the biomimetic to be reduced to a functional minimal motif of only six amino acids (ACAAPC-NH2).
Collapse
Affiliation(s)
- Matthias Schmidt
- Leibniz-Institut für Altersforschung, Beutenbergstrasse 11, 07745 Jena, Germany
| | | | | | | | | | | | | |
Collapse
|
25
|
Liu GF, FilipovicÌ M, IvanovicÌ-BurmazovicÌ I, Beuerle F, Witte P, Hirsch A. High Catalytic Activity of Dendritic C60Monoadducts in Metal-Free Superoxide Dismutation. Angew Chem Int Ed Engl 2008; 47:3991-4. [DOI: 10.1002/anie.200800008] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
26
|
Liu GF, Filipović M, Ivanović-Burmazović I, Beuerle F, Witte P, Hirsch A. High Catalytic Activity of Dendritic C60 Monoadducts in Metal-Free Superoxide Dismutation. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200800008] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
27
|
Woodman OL, Malakul W, Cao AH, Xu Q, Ritchie RH. Atrial natriuretic peptide prevents diabetes-induced endothelial dysfunction. Life Sci 2008; 82:847-54. [PMID: 18302965 DOI: 10.1016/j.lfs.2008.01.016] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2007] [Revised: 01/19/2008] [Accepted: 01/28/2008] [Indexed: 11/27/2022]
Abstract
Atrial natriuretic peptide (ANP) exerts beneficial effects on the cardiovascular system in part by exerting antioxidant activity. Given that oxidant stress is a key cause of endothelial dysfunction in diabetes, we investigated whether ANP improves endothelial function in rats with diabetes. Rats were injected with streptozotocin (55 mg/kg iv) to induce type 1 diabetes or the citrate vehicle as controls (n=12). After 4 weeks the diabetic rats were treated with ANP (10 pmol/kg/min sc, n=12) or the antioxidant tempol (1.5 mmol/kg/day sc, n=11), both by osmotic minipump, ramipril (1 mg/kg per day in the drinking water) or remained untreated (n=11). After a further 4 weeks, anaesthetised rats were killed by exsanguination and the thoracic aortae collected for examination of vascular activity and measurement of superoxide generation. Diabetic rats showed elevated plasma glucose concentration (45+/-3 mM) compared to controls (10+/-1 mM) and this was not affected by ANP (43+/-3 mM), ramipril (41+/-2 mM) or tempol (43+/-2 mM). Endothelium-dependent relaxation ex vivo in response to acetylcholine was impaired in diabetic rats (Rmax=66+/-4%) compared to control rats (Rmax=94+/-1%) but treatment with ANP (Rmax=80+/-4%), ramipril (Rmax=88+/-2%) or tempol (Rmax=81+/-5%) significantly improved those responses. Relaxant responses to the endothelium-independent vasodilator sodium nitroprusside were enhanced by treatment of diabetic rats with ANP or ramipril and their combination; but not by tempol. Superoxide generation was significantly elevated in aorta from untreated diabetic rats (649+/-146% of control). In diabetic rats, superoxide generation was significantly attenuated by ANP (to 229+/-78%) or tempol (to 186+/-64%). This study demonstrates that ANP improves vascular oxidant stress in concert with endothelial function, independent of any effect on plasma glucose levels. These studies may lead to new therapies, based on natriuretic peptide and/or antioxidant approaches, for ameliorating the vascular complications of diabetes.
Collapse
Affiliation(s)
- Owen L Woodman
- Department of Pharmacology, University of Melbourne, Melbourne, Victoria, Australia.
| | | | | | | | | |
Collapse
|
28
|
Ivanović-Burmazović I. Catalytic dismutation vs. reversible binding of superoxide. ADVANCES IN INORGANIC CHEMISTRY 2008. [DOI: 10.1016/s0898-8838(08)00003-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
|
29
|
Liu GF, Filipović M, Heinemann FW, Ivanović-Burmazović I. Seven-Coordinate Iron and Manganese Complexes with Acyclic and Rigid Pentadentate Chelates and Their Superoxide Dismutase Activity. Inorg Chem 2007; 46:8825-35. [PMID: 17880209 DOI: 10.1021/ic7012039] [Citation(s) in RCA: 76] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The reactions of seven-coordinate [Fe(III)(dapsox)(H(2)O)(2)]ClO(4).H(2)O (1), [Fe(II)(H(2)dapsox)(H(2)O)(2)](NO(3))(2).H(2)O (2), and [Mn(II)(H(2)dapsox)(CH(3)OH)(H(2)O)](ClO4)2(H2O) (3) complexes of the acyclic and rigid pentadentate H(2)dapsox ligand [H2dapsox = 2,6-diacetylpyridinebis(semioxamazide)] with superoxide have been studied spectrophotometrically, electrochemically, and by a submillisecond mixing UV/vis stopped-flow in dimethyl sulfoxide (DMSO). The same studies were performed on the seven-coordinate [Mn(II)(Me(2)[15]pyridinaneN(5))(H(2)O)(2)]Cl(2).H(2)O (4) complex with the flexible macrocyclic Me(2)[15]pyridinaneN(5) ligand (Me(2)[15]pyridinaneN(5) = trans-2,13-dimethyl-3,6,9,12,18-pentaazabicyclo[12.3.1]octadeca-1(18),14,16-triene), which belongs to the class of proven superoxide dismutase (SOD) mimetics. The X-ray crystal structures of 2-4 were determined. All complexes possess pentagonal-bipyramidal geometry with the pentadentate ligand in the equatorial plane and solvent molecules in the axial positions. The stopped-flow experiments in DMSO (0.06% of water) reveal that all four metal complexes catalyze the fast disproportionation of superoxide under the applied experimental conditions, and the catalytic rate constants are found to be (3.7 +/- 0.5) x 10(6), (3.9 +/- 0.5) x 10(6), (1.2 +/- 0.3) x 10(7), and (5.3 +/- 0.8) x 10(6) M(-1) s(-1) for 1-4, respectively. The cytochrome c McCord-Fridovich (McCF) assay in an aqueous solution at pH = 7.8 resulted in the IC(50) values (and corresponding kMcCF constants) for 3 and 4, 0.013 +/- 0.001 microM (1.9 +/- 0.2 x 10(8) M(-1) s(-1)) and 0.024 +/- 0.001 microM (1.1 +/- 0.3 x 10(8) M(-1) s(-1)), respectively. IC(50) values from a nitroblue tetrazolium assay are found to be 6.45 +/- 0.02 and 1.36 +/- 0.03 microM for 1 and 4, respectively. The data have been compared with those obtained by direct stopped-flow measurements and discussed in terms of the side reactions that occur under the conditions of indirect assays.
Collapse
Affiliation(s)
- Gao-Feng Liu
- Institute for Inorganic Chemistry, University of Erlangen-Nürnberg, Egerlandstrasse 1, 91058 Erlangen, Germany
| | | | | | | |
Collapse
|
30
|
Martin RCG, Liu Q, Wo JM, Ray MB, Li Y. Chemoprevention of Carcinogenic Progression to Esophageal Adenocarcinoma by the Manganese Superoxide Dismutase Supplementation. Clin Cancer Res 2007; 13:5176-82. [PMID: 17785574 DOI: 10.1158/1078-0432.ccr-07-1152] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE Oxidative stress is related to the carcinogenic pathway of reflux esophagitis to Barrett's metaplasia to esophageal adenocarcinoma (EAC). Recent studies have shown that a decreased manganese superoxide dismutase (MnSOD) level is associated with the increased incidences of Barrett's esophagus (BE) and EAC. The aim of this study was to investigate MnSOD supplementation as a chemopreventive agent to prevent oxidative injury and subsequent BE and EAC formation. EXPERIMENTAL DESIGN Our esophagoduodenal anastomotic (EDA) model was done on rats according to our established procedure and treated with Mn(III)tetrakis(4-benzoic acid) porphyrin (MnTBAP; 10 mg/kg, i.p. every 3 days). Histologic changes were determined after the EDA model at 1, 3, and 6 months. Lipid peroxidation and 8-hydroxy-deoxyguanosine for DNA oxidative damage were determined by thiobarbituric acid-reactive substance assay and immunohistochemical staining. Enzymatic activities of MnSOD and Cu/ZnSOD were evaluated, and the rate of proliferation was determined by proliferating cell nuclear antigen staining. RESULTS Severe esophagitis was seen in 100% of the EDA rats, and morphologic transformation within the esophageal epithelium was observed with intestinal metaplasia (40% of animals) and cancer (40% of animals) identified after 3 months. Decreased oxidative damage, along with the decreased degree of esophagitis and incidence of BE (20%) and EAC (0%), was found in MnTBAP-treated EDA rats comparing with the saline-treated EDA control. Decreased proliferation (46%) and increased SOD enzymatic activities (25%) were also found in the EDA rats treated with MnTBAP. CONCLUSION MnTBAP protected rat esophageal epithelium from oxidative injury induced by EDA, and it could prevent the transformation of esophageal epithelial cell to BE to EAC by preservation of antioxidants.
Collapse
Affiliation(s)
- Robert C G Martin
- Division of Surgical Oncology, Department of Surgery, University of Louisville School of Medicine, Louisville, Kentucky 40202, USA.
| | | | | | | | | |
Collapse
|
31
|
Shi W, Liu Y, Liu B, Song Y, Xu Y, Wang H, Sha Y, Xu G, Styring S, Huang P. Synthesis and characterization of a six-coordinate monomeric Mn(III) complex with SOD-like activity. J COORD CHEM 2007. [DOI: 10.1080/00958970500249814] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Wei Shi
- a State Key Laboratory for Structural Chemistry of Unstable and Stable Species , Centre for Molecular Science , Institute of Chemistry , Chinese Academy of Sciences , Beijing 100080, P.R. China
- c Department of Molecular Biomimetics , Uppsala University , S-75236 Uppsala, Sweden
| | - Yang Liu
- a State Key Laboratory for Structural Chemistry of Unstable and Stable Species , Centre for Molecular Science , Institute of Chemistry , Chinese Academy of Sciences , Beijing 100080, P.R. China
- b Department of Biophysics , School of Basic Medical Sciences , Peking University , Beijing 100083, P.R. China
| | - Bin Liu
- a State Key Laboratory for Structural Chemistry of Unstable and Stable Species , Centre for Molecular Science , Institute of Chemistry , Chinese Academy of Sciences , Beijing 100080, P.R. China
| | - Yuguang Song
- a State Key Laboratory for Structural Chemistry of Unstable and Stable Species , Centre for Molecular Science , Institute of Chemistry , Chinese Academy of Sciences , Beijing 100080, P.R. China
| | - Yingkai Xu
- a State Key Laboratory for Structural Chemistry of Unstable and Stable Species , Centre for Molecular Science , Institute of Chemistry , Chinese Academy of Sciences , Beijing 100080, P.R. China
| | - Hongmei Wang
- a State Key Laboratory for Structural Chemistry of Unstable and Stable Species , Centre for Molecular Science , Institute of Chemistry , Chinese Academy of Sciences , Beijing 100080, P.R. China
| | - Yinlin Sha
- b Department of Biophysics , School of Basic Medical Sciences , Peking University , Beijing 100083, P.R. China
| | - Guangzhi Xu
- a State Key Laboratory for Structural Chemistry of Unstable and Stable Species , Centre for Molecular Science , Institute of Chemistry , Chinese Academy of Sciences , Beijing 100080, P.R. China
| | - Stenbjörn Styring
- c Department of Molecular Biomimetics , Uppsala University , S-75236 Uppsala, Sweden
- d Department of Biochemistry , Centre for Chemistry and Chemical Engineering , Lund University , P.O. Box 124, S-22100 Lund, Sweden
| | - Ping Huang
- c Department of Molecular Biomimetics , Uppsala University , S-75236 Uppsala, Sweden
| |
Collapse
|
32
|
Structure–Activity Studies and the Design of Synthetic Superoxide Dismutase (SOD) Mimetics as Therapeutics. ADVANCES IN INORGANIC CHEMISTRY 2006. [DOI: 10.1016/s0898-8838(06)59007-5] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
33
|
Sanchez RJ, Srinivasan C, Munroe WH, Wallace MA, Martins J, Kao TY, Le K, Gralla EB, Valentine JS. Exogenous manganous ion at millimolar levels rescues all known dioxygen-sensitive phenotypes of yeast lacking CuZnSOD. J Biol Inorg Chem 2005; 10:913-23. [PMID: 16283393 DOI: 10.1007/s00775-005-0044-y] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2005] [Accepted: 10/02/2005] [Indexed: 10/25/2022]
Abstract
Yeasts lacking copper-zinc superoxide dismutase (sod1Delta) exhibit a broad range of phenotypes, many of which can be rescued by growth in the presence of high levels of ionic manganese. We undertook a comprehensive survey of the effects of manganese on wild-type and sod1Delta yeasts and found that 5 mM Mn2+ rescued all known growth-related phenotypes, such as slow growth in air, temperature sensitivity, specific amino acid auxotrophies, no growth in high oxygen, poor growth in nonfermentable carbon sources, and decreased stationary-phase survival. Iron-related phenotypes-elevated electron paramagnetic resonance detectable ("free") iron, decreased aconitase activity, and fragmenting vacuoles-as well as zinc sensitivity were also rescued. The activity of manganese superoxide dismutase remained constant or was reduced when the yeasts were grown in the presence of MnCl2, indicating that induction of this alternative superoxide dismutase is not the explanation. In contrast to MnCl2 treatment, addition of two manganese-containing superoxide dismutase mimetic compounds to the growth medium did not provide any rescue of sod1Delta yeast growth but rather had an sod1Delta-selective inhibitory effect at micromolar concentrations. Mechanisms by which ionic manganese can effect this rescue, while the mimetic compounds do not, are discussed.
Collapse
Affiliation(s)
- Raylene J Sanchez
- Department of Chemistry and Biochemistry, UCLA, 607 Charles E. Young Drive, East, Los Angeles, CA 90095-1569, USA
| | | | | | | | | | | | | | | | | |
Collapse
|
34
|
Gérard C, Mohamadou A, Marrot J, Brandes S, Tabard A. Synthesis and Characterization of Copper Complexes Containing the Tripodal N7 Ligand Tris{2-[(pyridin-2-ylmethyl)amino]ethyl}amine (=N′-(Pyridin-2-ylmethyl)-N,N-bis{2-[(pyridin-2-ylmethyl)amino]ethyl}ethane-1,2-diamine): Equilibrium, Spectroscopic Data, and Crystal Structures of Mono- and Trinuclear Copper(II) Complexes. Helv Chim Acta 2005. [DOI: 10.1002/hlca.200590176] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
35
|
Durot S, Policar C, Cisnetti F, Lambert F, Renault JP, Pelosi G, Blain G, Korri-Youssoufi H, Mahy JP. Series of Mn Complexes Based onN-Centered Ligands and Superoxide - Reactivity in an Anhydrous Medium and SOD-Like Activity in an Aqueous Medium Correlated to MnII/MnIII Redox Potentials. Eur J Inorg Chem 2005. [DOI: 10.1002/ejic.200400835] [Citation(s) in RCA: 89] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
36
|
Durot S, Lambert F, Renault JP, Policar C. A Pulse Radiolysis Study of Catalytic Superoxide Radical Dismutation by a Manganese(II) Complex with an N-Tripodal Ligand. Eur J Inorg Chem 2005. [DOI: 10.1002/ejic.200400834] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
37
|
Bellot F, Hardré R, Pelosi G, Thérisod M, Policar C. Superoxide dismutase-like activity of cobalt(ii) complexes based on a sugar platform. Chem Commun (Camb) 2005:5414-6. [PMID: 16261231 DOI: 10.1039/b508893c] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A SOD-like activity evaluated by a modified McCord-Fridovich test was evidenced for two Co(II) complexes built from "glycoligands" using a sugar platform derived from d-galactose and D-galactal and functionalized by three 2-picolyl groups.
Collapse
Affiliation(s)
- François Bellot
- Laboratoire de Chimie Bio-organique et Bio-inorganique, UMR8124, Bâtiment 420, Université Paris XI, F-91405 Orsay Cedex, France
| | | | | | | | | |
Collapse
|
38
|
YUASA M, OYAIZU K, YAMAGUCHI A, HAYASHI T, MIDORIKAWA U. Surface Modification of Reconstituted Hemoglobins Containing SOD-Active Metalloporphyrins. J Oleo Sci 2005. [DOI: 10.5650/jos.54.115] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
39
|
Alpert E, Altman H, Totary H, Gruzman A, Barnea D, Barash V, Sasson S. 4-Hydroxy tempol-induced impairment of mitochondrial function and augmentation of glucose transport in vascular endothelial and smooth muscle cells. Biochem Pharmacol 2004; 67:1985-95. [PMID: 15130774 DOI: 10.1016/j.bcp.2004.02.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2003] [Accepted: 02/02/2004] [Indexed: 11/21/2022]
Abstract
The water-soluble and cell permeable nitroxide derivative 4-hydroxy tempol (TPL) has been shown to reduce or ameliorate oxidative stress-induced dysfunction and damage in vascular endothelial cells. We studied the effects of TPL on glucose transport and metabolism in bovine aortic endothelial (VEC) and smooth muscle cells (VSMC) under normal and high glucose conditions. Normally, these cells operate an autoregulatory protective mechanism that limits the rate of glucose transport under hyperglycemic conditions by decreasing the cell content of their typical glucose transporter GLUT-1 mRNA and protein as well as its plasma membrane abundance. TPL augmented the rate of glucose transport both under normo- and hyperglycemic conditions by increasing GLUT-1 mRNA and protein content and its plasma membrane abundance in both types of cells, leading to an increased flux of glucose into the cells. These effects were found related to ROS-generating and oxidant activities of TPL and to a decreased rate of mitochondrial ATP production under both normo- and hyperglycemic conditions. Since impaired mitochondrial functions, and in particular decreased rate of ATP production, augment the expression of GLUT-1 protein and glucose transport and metabolism, we suggest that the stimulatory effects of TPL in vascular cells results from its unfavorable interactions in the mitochondrion. It is therefore suggested that effects of TPL in cells of cardiovascular system be evaluated in parallel to its adverse effects on glucose and energy metabolism.
Collapse
Affiliation(s)
- Evgenia Alpert
- Department of Pharmacology, School of Pharmacy, The Hebrew University-Hadassah Faculty of Medicine, P.O. Box 12272, Jerusalem 91120, Israel
| | | | | | | | | | | | | |
Collapse
|
40
|
Muscoli C, Cuzzocrea S, Riley DP, Zweier JL, Thiemermann C, Wang ZQ, Salvemini D. On the selectivity of superoxide dismutase mimetics and its importance in pharmacological studies. Br J Pharmacol 2004; 140:445-60. [PMID: 14522841 PMCID: PMC1574047 DOI: 10.1038/sj.bjp.0705430] [Citation(s) in RCA: 201] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The list of pathophysiological conditions associated with the overproduction of superoxide expands every day. Much of the knowledge compiled on the role of this radical in disease has been gathered using the native superoxide dismutase enzyme and, more recently, by the use of superoxide dismutase knockout models or transgenic models that overexpress the various isoforms of the enzyme. Although the native enzyme has shown promising anti-inflammatory properties in both preclinical and clinical studies, there were drawbacks and issues associated with its use as a therapeutic agent and pharmacological tool. Based on the concept that removal of superoxide modulates the course of inflammation, synthetic, low-molecular-weight mimetics of the superoxide dismutase enzymes that could overcome some of the limitations associated with the use of the native enzyme have been designed. In this review, we will discuss the advances made using various superoxide dismutase mimetics that led to the proposal that superoxide (and/or the product of its interaction with nitric oxide, peroxynitrite) is an important mediator of inflammation, and to the conclusion that superoxide dismutase mimetics can be utilized as therapeutic agents in diseases of various etiologies. The importance of the selectivity of such compounds in pharmacological studies will be discussed.
Collapse
Affiliation(s)
- Carolina Muscoli
- Department of Biological and Pharmacological Research, MetaPhore Pharmaceuticals, 1910 Innerbelt Business Center Drive, St Louis, MO 63114, U.S.A
- Faculty of Pharmacy, University of Catanzaro “Magna Graecia”, Roccelletta di Borgia, Catanzaro, Italy
| | | | - Dennis P Riley
- Department of Biological and Pharmacological Research, MetaPhore Pharmaceuticals, 1910 Innerbelt Business Center Drive, St Louis, MO 63114, U.S.A
| | - Jay L Zweier
- Davis Heart & Lung Research Institute, The Ohio State University, Ohio, U.S.A
| | - Christoph Thiemermann
- Department of Experimental Medicine & Nephrology, William Harvey Research Institute St Bartholomews and the Royal London School of Medicine & Dentistry, Charterhouse Square, London EC1M6BQ
| | - Zhi-Qiang Wang
- Department of Biological and Pharmacological Research, MetaPhore Pharmaceuticals, 1910 Innerbelt Business Center Drive, St Louis, MO 63114, U.S.A
| | - Daniela Salvemini
- Department of Biological and Pharmacological Research, MetaPhore Pharmaceuticals, 1910 Innerbelt Business Center Drive, St Louis, MO 63114, U.S.A
- Author for correspondence:
| |
Collapse
|
41
|
Puglisi A, Tabbì G, Vecchio G. Bioconjugates of cyclodextrins of manganese salen-type ligand with superoxide dismutase activity. J Inorg Biochem 2004; 98:969-76. [PMID: 15149803 DOI: 10.1016/j.jinorgbio.2004.02.012] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2003] [Revised: 02/17/2004] [Accepted: 02/18/2004] [Indexed: 01/08/2023]
Abstract
6A,6B-Dideoxy-6A,6B-di[(N-salicylidene)amino]-beta-cyclodextrin was synthesized and characterized by NMR, UV and CD spectroscopy in order to prepare a N,N(')-bis-(salicylidene)ethane-1,2-diamine (SalenH(2)) type ligand. The manganese(III) complex was synthesized and characterized by UV and cyclic voltammetry and compared to EUK-8. The superoxide dismutase (SOD)-like and catalase-like activities were tested by indirect assay. The cyclodextrin complex shows a larger solubility than EUK-8 and good SOD-like activity. Catalase activity is also shown.
Collapse
Affiliation(s)
- Antonino Puglisi
- Dipartimento di Scienze Chimiche, Università di Catania, viale A. Doria 8, 95125 Catania, Italy
| | | | | |
Collapse
|
42
|
Toth A, Halmosi R, Kovacs K, Deres P, Kalai T, Hideg K, Toth K, Sumegi B. Akt activation induced by an antioxidant compound during ischemia-reperfusion. Free Radic Biol Med 2003; 35:1051-63. [PMID: 14572608 DOI: 10.1016/s0891-5849(03)00467-2] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Molecular mechanisms of cardioprotection afforded by modified mexiletine compounds were investigated during ischemia-reperfusion (IR) in Langendorff perfused hearts. Rat hearts were subjected to a global 25 min ischemia followed by reperfusion, either untreated or treated with mexiletine, or three substituted mexiletine derivates (5 muM). A modified mexiletine derivative (H-2693) promoted best the recovery of myocardial energy metabolism (assessed by (31)P NMR spectroscopy) compared to untreated and mexiletine-treated hearts. H-2693 also preserved cardiac contractile function and attenuated the IR-induced lipid peroxidation (TBARS formation) and protein oxidation (carbonyl content). Western blot revealed that H-2693 propagated the phosphorylation of Akt (activation) and its downstream substrate glycogen synthase kinase-3beta (GSK-3beta, inactivation) compared to untreated IR. Parallel treatment with the phosphatidylinositol-3-kinase (upstream activator of Akt) inhibitor wortmannin (100 nM) abolished the beneficial effects of H-2693 on energetics and function, and reduced Akt and GSK-3beta phosphorylation. As a result of the antiapoptotic impacts of Akt activation, H-2693 decreased caspase-3 activity, which was neutralized by wortmannin. Here we first demonstrated that a free radical-entrapping compound could activate the prosurvival Akt pathway beyond its proven ability to scavenge reactive oxygen species. In conclusion, the favorable influence of H-2693 on signaling events during IR may have considerably contributed to its cardioprotective effect.
Collapse
Affiliation(s)
- Ambrus Toth
- Department of Biochemistry and Medical Chemistry, University of Pecs Medical School, Pecs, Hungary
| | | | | | | | | | | | | | | |
Collapse
|
43
|
Moridani MY, Pourahmad J, Bui H, Siraki A, O'Brien PJ. Dietary flavonoid iron complexes as cytoprotective superoxide radical scavengers. Free Radic Biol Med 2003; 34:243-53. [PMID: 12521606 DOI: 10.1016/s0891-5849(02)01241-8] [Citation(s) in RCA: 166] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Superoxide radicals have been implicated in the pathogenesis of ischemia/reperfusion, aging, and inflammatory diseases. In the present work, we have shown that the Fe(3+) complexes of flavonoids (polyphenols) were much more effective than the uncomplexed flavonoids in protecting isolated rat hepatocytes against hypoxia-reoxygenation injury. The 2:1 flavonoid-metal complexes of Cu(2+), Fe(2+), or Fe(3+) were more effective than the parent compounds in scavenging superoxide radicals generated by xanthine oxidase/hypoxanthine (an enzymatic superoxide-generating system). The 2:1 [flavonoid:Fe(3+)] complexes but not the [deferoxamine:Fe(3+)] complex readily scavenged superoxide radicals. These results suggest that the initial step in superoxide radical scavenging (SRS) activity involves a redox-active flavonoid:Fe(3+) complex. Flavonoid:Fe(3+) complexes should, therefore, be tested as a therapy for the treatment of ischemia/reperfusion injury.
Collapse
Affiliation(s)
- Majid Y Moridani
- Faculty of Pharmacy, University of Toronto, Toronto, Ontario, Canada
| | | | | | | | | |
Collapse
|
44
|
Thiemermann C. Membrane-permeable radical scavengers (tempol) for shock, ischemia-reperfusion injury, and inflammation. Crit Care Med 2003; 31:S76-84. [PMID: 12544980 DOI: 10.1097/00003246-200301001-00011] [Citation(s) in RCA: 91] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Christoph Thiemermann
- Department of Experimental Medicine and Nephrology, William Harvey Research Institute, St. Bartholomew's Hospital Medical College, London EC1M6BQ, UK.
| |
Collapse
|
45
|
YUASA M, YAMAGUCHI A, MIKAMI S, MIDORIKAWA U, KAWAKAMI Y, NAGAOKA S. Synthesis of Reconstituted Hemoglobins Containing Metalloporphyrin Derivatives and SOD Activity. J Oleo Sci 2003. [DOI: 10.5650/jos.52.149] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
46
|
YAMAGUCHI A, ISHINO T, MATSUKURA N, KAWAKAMI H, ASAYAMA S, NAGAOKA S, YUASA M. Superoxide Dismutase Activities of Ironporphyrins Modified with Poly (L-lysine). J Oleo Sci 2003. [DOI: 10.5650/jos.52.269] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
47
|
Hartman JR, Vachet RW, Pearson W, Wheat R, Callahan JH. A comparison of the gas, solution, and solid state coordination environments for the copper(II) complexes of a series of aminopyridine ligands of varying coordination number. Inorganica Chim Acta 2003. [DOI: 10.1016/s0020-1693(02)01229-x] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
48
|
Gauuan PJF, Trova MP, Gregor-Boros L, Bocckino SB, Crapo JD, Day BJ. Superoxide dismutase mimetics: synthesis and structure-activity relationship study of MnTBAP analogues. Bioorg Med Chem 2002; 10:3013-21. [PMID: 12110324 DOI: 10.1016/s0968-0896(02)00153-0] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Carboxylic ester and amide-substituted analogues of [5,10,15,20-tetrakis(4-carboxyphenyl)-porphyrinato]manganese(III) chloride (MnTBAP) were synthesized and assayed as potential superoxide dismutase (SOD) mimetics. The tetraester analogues 4a and 4b were found to have comparable SOD activity to the known SOD mimetic MnTBAP, while amides 4c-4e exhibited reduced SOD activity. In the substituted methyl benzoate/acid and disubstituted porphyrin series, analogues 12c, 12f, and 12m were found to have comparable to improved SOD activity relative to MnTBAP and analogues 12j, 13a, and 13d exhibited improved activity in both the SOD and thiobarbituric acid reactive species (TBARS) assays relative to MnTBAP.
Collapse
|
49
|
Czapski G, Samuni A, Goldstein S. Superoxide dismutase mimics: antioxidative and adverse effects. Methods Enzymol 2002; 349:234-42. [PMID: 11912913 DOI: 10.1016/s0076-6879(02)49338-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Gidon Czapski
- Department of Physical Chemistry, Hebrew University of Jerusalem, Jerusalem 91940, Israel
| | | | | |
Collapse
|
50
|
Fukushima T, Kaetsu A, Lim H, Moriyama M. Possible role of 1-methylnicotinamide in the pathogenesis of Parkinson's disease. EXPERIMENTAL AND TOXICOLOGIC PATHOLOGY : OFFICIAL JOURNAL OF THE GESELLSCHAFT FUR TOXIKOLOGISCHE PATHOLOGIE 2002; 53:469-73. [PMID: 11926289 DOI: 10.1078/0940-2993-00214] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
This study tested the hypothesis, that nicotinamide N-methyltransferase (NAMT) activity in the brain could convert nicotinamide to 1-methylnicotinamide (MNA) and by that means damage the nigro-neostriatal dopaminergic neurons. The NAMT activities of rat brain and liver were assayed with gas chromatographic-mass spectrometric analysis in a selected ion monitoring system. They amounted to 0.30 nmol/mg x h and 0.51 nmol/mg x h, respectively. The MNA injection in rat substantia nigra pars compacta significantly decreased dopamine content in the striatum. NADH oxidation and lipid peroxidation by MNA via rat brain submitochondrial particles (SMP) under the condition of pH ranging from pH 6.0 to 10.0 were verified. The pH optimum for the NADH oxidation was 9.0. The pH optimum for the peroxidation of the lipid composing SMP by MNA was also 9.0. The lipid peroxidation in this assay was suppressed by superoxide dismutase. The superoxide anion formed by MNA via mitochondria might be involved in the etiology of Parkinson's disease.
Collapse
|