1
|
Marcinkowski D, Kubicki M, Consiglio G, Hnatejko Z, Majcher-Fitas AM, Podgajny R, Patroniak V, Gorczyński A. Unexpected structural complexity of d-block metallosupramolecular architectures within the benzimidazole-phenoxo ligand scaffold for crystal engineering aspects. Sci Rep 2023; 13:18055. [PMID: 37872235 PMCID: PMC10593740 DOI: 10.1038/s41598-023-45109-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Accepted: 10/16/2023] [Indexed: 10/25/2023] Open
Abstract
Design of metallosupramolecular materials encompassing more than one kind of supramolecular interaction can become deceptive, but it is necessary to better understand the concept of the controlled formation of supramolecular systems. Herein, we show the structural diversity of the bis-compartmental phenoxo-benzimidazole ligand H3L1 upon self-assembly with variety of d-block metal ions, accounting for factors such as: counterions, pH, solvent and reaction conditions. Solid-state and solution studies show that the parent ligand can accommodate different forms, related to (de)protonation and proton-transfer, resulting in the formation of mono-, bi- or tetrametallic architectures, which was also confirmed with control studies on the new mono-compartmental phenoxo-benzimidazole H2L2 ligand analogue. For the chosen architectures, structural variables such as porous character, magnetic behaviour or luminescence studies were studied to demonstrate how the form of H3L1 ligand affects the final form of the supramolecular architecture and observed properties. Such complex structural variations within the benzimidazole-phenoxo-type ligand have been demonstrated for the first time and this proof-of-concept can be used to integrate these principles in more sophisticated architectures in the future, combining both the benzimidazole and phenoxide subunits. Ultimately, those principles could be utilized for targeted manipulation of properties through molecular tectonics and crystal engineering aspects.
Collapse
Affiliation(s)
- Dawid Marcinkowski
- Faculty of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego 8, 61-614, Poznań, Poland
| | - Maciej Kubicki
- Faculty of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego 8, 61-614, Poznań, Poland
| | - Giuseppe Consiglio
- Dipartimento di Scienze Chimiche, Università di Catania, 95125, Catania, Italy
| | - Zbigniew Hnatejko
- Faculty of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego 8, 61-614, Poznań, Poland
| | - Anna M Majcher-Fitas
- Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, Łojasiewicza 11, 30-348, Kraków, Poland
| | - Robert Podgajny
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387, Krakow, Poland
| | - Violetta Patroniak
- Faculty of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego 8, 61-614, Poznań, Poland
| | - Adam Gorczyński
- Faculty of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego 8, 61-614, Poznań, Poland.
| |
Collapse
|
2
|
A New Manganese Superoxide Dismutase Mimetic Improves Oxaliplatin-Induced Neuropathy and Global Tolerance in Mice. Int J Mol Sci 2022; 23:ijms232112938. [DOI: 10.3390/ijms232112938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 10/18/2022] [Accepted: 10/20/2022] [Indexed: 11/16/2022] Open
Abstract
Reactive oxygen species (ROS) are produced by every aerobic cell during mitochondrial oxidative metabolism as well as in cellular response to xenobiotics, cytokines, and bacterial invasion. Superoxide Dismutases (SOD) are antioxidant proteins that convert superoxide anions (O2•−) to hydrogen peroxide (H2O2) and dioxygen. Using the differential in the level of oxidative stress between normal and cancer cells, SOD mimetics can show an antitumoral effect and prevent oxaliplatin-induced peripheral neuropathy. New Pt(IV) conjugate prodrugs (OxPt-x-Mn1C1A (x = 1, 1-OH, 2)), combining oxaliplatin and a Mn SOD mimic (MnSODm Mn1C1A) with a covalent link, were designed. Their stability in buffer and in the presence of sodium ascorbate was studied. In vitro, their antitumoral activity was assessed by the viability and ROS production of tumor cell lines (CT16, HCT 116, KC) and fibroblasts (primary culture and NIH 3T3). In vivo, a murine model of colorectal cancer was created with subcutaneous injection of CT26 cells in Balb/c mice. Tumor size and volume were measured weekly in four groups: vehicle, oxaliplatin, and oxaliplatin associated with MnSODm Mn1C1A and the bis-conjugate OxPt-2-Mn1C1A. Oxaliplatin-induced peripheral neuropathy (OIPN) was assessed using a Von Frey test reflecting chronic hypoalgesia. Tolerance to treatment was assessed with a clinical score including four items: weight loss, weariness, alopecia, and diarrhea. In vitro, Mn1C1A associated with oxaliplatin and Pt(IV) conjugates treatment induced significantly higher production of H2O2 in all cell lines and showed a significant improvement of the antitumoral efficacy compared to oxaliplatin alone. In vivo, the association of Mn1C1A to oxaliplatin did not decrease its antitumoral activity, while OxPt-2-Mn1C1A had lower antitumoral activity than oxaliplatin alone. Mn1C1A associated with oxaliplatin significantly decreased OIPN and also improved global clinical tolerance of oxaliplatin. A neuroprotective effect was observed, associated with a significantly improved tolerance to oxaliplatin without impairing its antitumoral activity.
Collapse
|
3
|
Zoumpoulaki M, Schanne G, Delsuc N, Preud'homme H, Quévrain E, Eskenazi N, Gazzah G, Guillot R, Seksik P, Vinh J, Lobinski R, Policar C. Deciphering the Metal Speciation in Low‐Molecular‐Weight Complexes by IMS‐MS: Application to the Detection of Manganese Superoxide Dismutase Mimics in Cell Lysates. Angew Chem Int Ed Engl 2022; 61:e202203066. [DOI: 10.1002/anie.202203066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Indexed: 11/09/2022]
Affiliation(s)
- Martha Zoumpoulaki
- Laboratoire des biomolécules (LBM) Département de chimie École normale supérieure PSL University, Sorbonne Université, CNRS 75005 Paris France
- SMBP ESPCI Paris PSL University, UMR 8249 CNRS France
- Centre de Recherche de Saint-Antoine, INSERM, UMRS 938 Sorbonne University, INSERM 75012 Paris France
| | - Gabrielle Schanne
- Laboratoire des biomolécules (LBM) Département de chimie École normale supérieure PSL University, Sorbonne Université, CNRS 75005 Paris France
- Centre de Recherche de Saint-Antoine, INSERM, UMRS 938 Sorbonne University, INSERM 75012 Paris France
| | - Nicolas Delsuc
- Laboratoire des biomolécules (LBM) Département de chimie École normale supérieure PSL University, Sorbonne Université, CNRS 75005 Paris France
| | | | - Elodie Quévrain
- Laboratoire des biomolécules (LBM) Département de chimie École normale supérieure PSL University, Sorbonne Université, CNRS 75005 Paris France
| | | | - Géraldine Gazzah
- Laboratoire des biomolécules (LBM) Département de chimie École normale supérieure PSL University, Sorbonne Université, CNRS 75005 Paris France
| | - Regis Guillot
- ICMMO UMR CNRS 8182 Université Paris-Saclay 91405 Orsay France
| | - Philippe Seksik
- Centre de Recherche de Saint-Antoine, INSERM, UMRS 938 Sorbonne University, INSERM 75012 Paris France
- Gastroenterology Department Saint-Antoine Hospital Sorbonne Université, APHP Paris France
| | - Joelle Vinh
- SMBP ESPCI Paris PSL University, UMR 8249 CNRS France
| | - Ryszard Lobinski
- Universite de Pau, CNRS, E2S, IPREM-UMR5254, Hélioparc 64053 Pau France
- Chair of Analytical Chemistry Warsaw University of Technology, Noakowskiego 3 00-664 Warsaw Poland
| | - Clotilde Policar
- Laboratoire des biomolécules (LBM) Département de chimie École normale supérieure PSL University, Sorbonne Université, CNRS 75005 Paris France
| |
Collapse
|
4
|
Deciphering the Metal Speciation in Low‐Molecular‐Weight Complexes by IMS‐MS: Application to the Detection of Manganese Superoxide Dismutase Mimics in Cell Lysates. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202203066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
5
|
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
|
6
|
Evaluation of the compounds commonly known as superoxide dismutase and catalase mimics in cellular models. J Inorg Biochem 2021; 219:111431. [PMID: 33798828 DOI: 10.1016/j.jinorgbio.2021.111431] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 03/15/2021] [Accepted: 03/15/2021] [Indexed: 12/15/2022]
Abstract
Oxidative stress that results from an imbalance between the concentrations of reactive species (RS) and antioxidant defenses is associated with many pathologies. Superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase are among the key enzymes that maintain the low nanomolar physiological concentrations of superoxide and hydrogen peroxide. The increase in the levels of these species and their progeny could have deleterious effects. In this context, chemists have developed SOD and CAT mimics to supplement them when cells are overwhelmed with oxidative stress. However, the beneficial activity of such molecules in cells depends not only on their intrinsic catalytic activities but also on their stability in biological context, their cell penetration and their cellular localization. We have employed cellular assays to characterize several compounds that possess SOD and CAT activities and have been frequently used in cellular and animal models. We used cellular assays that address SOD and CAT activities of the compounds. Finally, we determined the effect of compounds on the suppression of the inflammation in HT29-MD2 cells challenged by lipopolysaccharide. When the assay requires penetration inside cells, the SOD mimics Mn(III) meso-tetrakis(N-(2'-n-butoxyethyl)pyridinium-2-yl)porphyrin (MnTnBuOE-2-PyP5+) and Mn(II) dichloro[(4aR,13aR,17aR,21aR)-1,2,3,4,4a,5,6,12,13,13a,14,15,16,17,17a,18,19,20,21,21a-eicosahydro-11,7-nitrilo-7Hdibenzo[b,h] [1,4, 7,10] tetraazacycloheptadecine-κN5,κN13,κN18,κN21,κN22] (Imisopasem manganese, M40403, CG4419) were found efficacious at 10 μM, while Mn(II) chloro N-(phenolato)-N,N'-bis[2-(N-methyl-imidazolyl)methyl]-ethane-1,2-diamine (Mn1) requires an incubation at 100 μM. This study thus demonstrates that MnTnBuOE-2-PyP5+, M40403 and Mn1 were efficacious in suppressing inflammatory response in HT29-MD2 cells and such action appears to be related to their ability to enter the cells and modulate reactive oxygen species (ROS) levels.
Collapse
|
7
|
Mathieu E, Bernard AS, Ching HYV, Somogyi A, Medjoubi K, Fores JR, Bertrand HC, Vincent A, Trépout S, Guerquin-Kern JL, Scheitler A, Ivanović-Burmazović I, Seksik P, Delsuc N, Policar C. Anti-inflammatory activity of superoxide dismutase mimics functionalized with cell-penetrating peptides. Dalton Trans 2020; 49:2323-2330. [DOI: 10.1039/c9dt04619d] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A superoxide dismutase mimic was functionalized with three peptides: -R9, -RRWWRRWRR or -Fx-r-Fx-K (MPP). They were studied in intestinal epithelial cells in an inorganic cellular chemistry approach: quantification, distribution and bio-activity.
Collapse
|
8
|
Mathieu E, Bernard AS, Quévrain E, Zoumpoulaki M, Iriart S, Lung-Soong C, Lai B, Medjoubi K, Henry L, Nagarajan S, Poyer F, Scheitler A, Ivanović-Burmazović I, Marco S, Somogyi A, Seksik P, Delsuc N, Policar C. Intracellular location matters: rationalization of the anti-inflammatory activity of a manganese(ii) superoxide dismutase mimic complex. Chem Commun (Camb) 2020; 56:7885-7888. [DOI: 10.1039/d0cc03398g] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The study of Mn-based superoxide dismutase mimic conjugated with a multimodal Re-probe in a cellular model of oxidative stress revealed that its bioactivity is associated with its accumulation at the mitochondria.
Collapse
|
9
|
Guillaumot MA, Cerles O, Bertrand HC, Benoit E, Nicco C, Chouzenoux S, Schmitt A, Batteux F, Policar C, Coriat R. Oxaliplatin-induced neuropathy: the preventive effect of a new super-oxide dismutase modulator. Oncotarget 2019; 10:6418-6431. [PMID: 31741707 PMCID: PMC6849645 DOI: 10.18632/oncotarget.27248] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Accepted: 09/10/2019] [Indexed: 01/09/2023] Open
Abstract
By using the differential in level of oxidative status between normal and cancer cells, SuperOxide Dismutase (SOD) mimetics can have anti-tumor efficacy and prevent oxaliplatin-induced peripheral neuropathy. Our objective was to evaluate the neuroprotective efficacy of MAG, a new SOD mimic. In vitro, the effects of MAG alone or with oxaliplatin were studied on colon cancer cells (HT29 and CT26) and on normal fibroblast cells (NIH3T3). The cell viability (by crystal violet) as well as the production of reactive forms of oxygen and glutathione (by spectrofluorimetric assay) was measured. In vivo, efficacy on tumor growth was assessed in mice grafted with CT26 colon cancer cells. The effects on induced neurotoxicity were measured by specific behavioral Von Frey nociception, cold-plate tests, specific functional neuromuscular assay and electron microscopy. In vitro, MAG induced a production of hydrogen peroxide in all cells. At 24 h-incubation, MAG exhibits a cytotoxic activity in all cell lines. A cytotoxic additive effect of MAG and oxaliplatin was observed through oxidative burst. In vivo, oxaliplatin-treated mice associated with MAG did not counteract oxaliplatin’s antitumoral efficacy. After 4 weeks of treatment with oxaliplatin combined with MAG, behavioral and functional tests showed a decrease in peripheral neuropathy induced by oxaliplatin in vivo. Electron microscopy analyses on sciatic nerves revealed an oxaliplatin-induced demyelination which is prevented by the association of MAG to this chemotherapy. In conclusion, MAG prevents the appearance of sensitive axonal neuropathy and neuromuscular disorders induced by oxaliplatin without affecting its antitumor activity.
Collapse
Affiliation(s)
- Marie-Anne Guillaumot
- Département "Development, Reproduction and Cancer", Institut Cochin, Paris Descartes Université, Sorbonne Paris Cité, INSERM U1016, Paris, France
| | - Olivier Cerles
- Département "Development, Reproduction and Cancer", Institut Cochin, Paris Descartes Université, Sorbonne Paris Cité, INSERM U1016, Paris, France
| | - Hélène C Bertrand
- Laboratoire des Biomolécules, LBM, Département de Chimie, École Normale Supérieure, PSL University, Sorbonne Université, CNRS, Paris, France
| | - Evelyne Benoit
- Service d'Ingénierie Moléculaire des Protéines (SIMOPRO), CEA de Saclay, Université Paris-Saclay, Gif-sur-Yvette, France.,Institut des Neurosciences Paris-Saclay (Neuro-PSI), CNRS, UMR CNRS/Université Paris-Sud 9197, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Carole Nicco
- Département "Development, Reproduction and Cancer", Institut Cochin, Paris Descartes Université, Sorbonne Paris Cité, INSERM U1016, Paris, France
| | - Sandrine Chouzenoux
- Département "Development, Reproduction and Cancer", Institut Cochin, Paris Descartes Université, Sorbonne Paris Cité, INSERM U1016, Paris, France
| | - Alain Schmitt
- Plateforme Imagerie Cellulaire, Microscopie électronique Institut Cochin, Université Paris Descartes, Sorbonne Paris Cité, INSERM U1016, Paris, France
| | - Frédéric Batteux
- Département "Development, Reproduction and Cancer", Institut Cochin, Paris Descartes Université, Sorbonne Paris Cité, INSERM U1016, Paris, France.,Service d'Immunologie, Centre Hospitalo-Universitaire Cochin AP-HP, Université Paris Descartes, Paris, France
| | - Clotilde Policar
- Laboratoire des Biomolécules, LBM, Département de Chimie, École Normale Supérieure, PSL University, Sorbonne Université, CNRS, Paris, France
| | - Romain Coriat
- Département "Development, Reproduction and Cancer", Institut Cochin, Paris Descartes Université, Sorbonne Paris Cité, INSERM U1016, Paris, France.,Service de Gastro-Entérologie du Centre Hospitalo-Universitaire Cochin, APHP, Université Paris Descartes, Paris, France
| |
Collapse
|
10
|
Padilha DDS, Scarpellini M. Chlorido-(2,2'-{[2-(1-methyl-1 H-imidazol-2-yl-κ N 3)imidazolidine-1,3-diyl-κ N]bis-(methyl-ene)}bis-(1-methyl-1 H-imidazole-κ N 3))copper(II) perchlorate. ACTA CRYSTALLOGRAPHICA SECTION E-CRYSTALLOGRAPHIC COMMUNICATIONS 2019; 75:547-551. [PMID: 31110783 PMCID: PMC6505613 DOI: 10.1107/s2056989019004055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Accepted: 03/25/2019] [Indexed: 11/11/2022]
Abstract
The molecular and crystal structure of a novel copper(II) complex bearing a new tetradentate 1-methyl-imidazole-containing imidazolidine ligand is described. In the crystal structure of the title complex, [CuCl(C17H24N8)]ClO4, the copper(II) metal exhibits an N4Cl pentacoordinate environment in a distorted square-pyramidal geometry. Coordination to the metal centre occurs through the three 1-methylimidazole N atoms from the pendant groups, one amine N atom from the imidazolidine moiety and one chlorido anion. Intermolecular interactions take place at two of the 1-methyl-imidazole rings in the form of parallel-displaced π–π stacking interactions forming chains parallel to the a axis. Three O atoms of the perchlorate anion are rotationally disordered between two orientations with occupancies of 0.5.
Collapse
Affiliation(s)
- Diego da Silva Padilha
- Instituto de Química, Universidade Federal do Rio de Janeiro, Av. Athos da, Silveira Ramos, 149, Bl. A, Lab. 628a. CEP 21941-909, Rio de Janeiro, RJ, Brazil
| | - Marciela Scarpellini
- Instituto de Química, Universidade Federal do Rio de Janeiro, Av. Athos da, Silveira Ramos, 149, Bl. A, Lab. 628a. CEP 21941-909, Rio de Janeiro, RJ, Brazil
| |
Collapse
|
11
|
Rationally designed mimics of antioxidant manganoenzymes: Role of structural features in the quest for catalysts with catalase and superoxide dismutase activity. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2018.03.005] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
|
12
|
Conte-Daban A, Ambike V, Guillot R, Delsuc N, Policar C, Hureau C. A Metallo Pro-Drug to Target Cu II in the Context of Alzheimer's Disease. Chemistry 2018; 24:5095-5099. [PMID: 29334419 PMCID: PMC6120673 DOI: 10.1002/chem.201706049] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Indexed: 01/28/2023]
Abstract
Alzheimer's disease and oxidative stress are connected. In the present communication, we report the use of a MnII -based superoxide dismutase (SOD) mimic ([MnII (L)]+ , 1+ ) as a pro-drug candidate to target CuII -associated events, namely, CuII -induced formation of reactive oxygen species (ROS) and modulation of the amyloid-β (Aβ) peptide aggregation. Complex 1+ is able to remove CuII from Aβ, stop ROS and prevent alteration of Aβ aggregation as would do the corresponding free ligand LH. Using 1+ instead of LH in further biological applications would have the double advantage to avoid the cell toxicity of LH and to benefit from its proved SOD-like activity.
Collapse
Affiliation(s)
- Amandine Conte-Daban
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205 route de Narbonne, BP 44099 31077 Toulouse Cedex 4, France
- Université de Toulouse, UPS, INPT, 31077 Toulouse Cedex 4, France
| | - Vinita Ambike
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, UMR CNRS 8182, Bâtiments 420, Université Paris-Sud 11, Université Paris-Saclay, Rue du doyen Georges Poitou, 91405 Orsay cedex, France
| | - Régis Guillot
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, UMR CNRS 8182, Bâtiments 420, Université Paris-Sud 11, Université Paris-Saclay, Rue du doyen Georges Poitou, 91405 Orsay cedex, France
| | - Nicolas Delsuc
- Laboratoire des Biomolécules, Département de chimie, École normale supérieure, UPMC Univ. Paris 06, CNRS, PSL Research University, 24 rue Lhomond, 75005 Paris, France
- Sorbonne Universités, UPMC Univ. Paris 06, École normale supérieure, CNRS, Laboratoire des Biomolécules (LBM), 75005 Paris, France
| | - Clotilde Policar
- Laboratoire des Biomolécules, Département de chimie, École normale supérieure, UPMC Univ. Paris 06, CNRS, PSL Research University, 24 rue Lhomond, 75005 Paris, France
- Sorbonne Universités, UPMC Univ. Paris 06, École normale supérieure, CNRS, Laboratoire des Biomolécules (LBM), 75005 Paris, France
| | - Christelle Hureau
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205 route de Narbonne, BP 44099 31077 Toulouse Cedex 4, France
- Université de Toulouse, UPS, INPT, 31077 Toulouse Cedex 4, France
| |
Collapse
|
13
|
Mathieu E, Bernard AS, Delsuc N, Quévrain E, Gazzah G, Lai B, Chain F, Langella P, Bachelet M, Masliah J, Seksik P, Policar C. A Cell-Penetrant Manganese Superoxide Dismutase (MnSOD) Mimic Is Able To Complement MnSOD and Exerts an Antiinflammatory Effect on Cellular and Animal Models of Inflammatory Bowel Diseases. Inorg Chem 2017; 56:2545-2555. [PMID: 28198622 DOI: 10.1021/acs.inorgchem.6b02695] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Inorganic complexes are increasingly used for biological and medicinal applications, and the question of the cell penetration and distribution of metallodrugs is key to understanding their biological activity. Oxidative stress is known to be involved in inflammation and in inflammatory bowel diseases for which antioxidative defenses are weakened. We report here the study of the manganese complex Mn1 mimicking superoxide dismutase (SOD), a protein involved in cell protection against oxidative stress, using an approach in inorganic cellular chemistry combining the investigation of Mn1 intracellular speciation using mass spectrometry and of its quantification and distribution using electron paramagnetic resonance and spatially resolved X-ray fluorescence with evaluation of its biological activity. More precisely, we have looked for and found the MS signature of Mn1 in cell lysates and quantified the overall manganese content. Intestinal epithelial cells activated by bacterial lipopolysaccharide were taken as a cellular model of oxidative stress and inflammation. DNBS-induced colitis in mice was used to investigate Mn1 activity in vivo. Mn1 exerts an intracellular antiinflammatory activity, remains at least partially coordinated, with diffuse distribution over the whole cell, and functionally complements mitochondrial MnSOD.
Collapse
Affiliation(s)
- Emilie Mathieu
- Département de Chimie, Ecole Normale Superieure, PSL Research University, UPMC Univ Paris 06, CNRS, Laboratoire des Biomolecules (LBM), 24 rue Lhomond, 75005 Paris, France
| | - Anne-Sophie Bernard
- Département de Chimie, Ecole Normale Superieure, PSL Research University, UPMC Univ Paris 06, CNRS, Laboratoire des Biomolecules (LBM), 24 rue Lhomond, 75005 Paris, France
| | - Nicolas Delsuc
- Département de Chimie, Ecole Normale Superieure, PSL Research University, UPMC Univ Paris 06, CNRS, Laboratoire des Biomolecules (LBM), 24 rue Lhomond, 75005 Paris, France
| | - Elodie Quévrain
- Département de Chimie, Ecole Normale Superieure, PSL Research University, UPMC Univ Paris 06, CNRS, Laboratoire des Biomolecules (LBM), 24 rue Lhomond, 75005 Paris, France
| | - Géraldine Gazzah
- Département de Chimie, Ecole Normale Superieure, PSL Research University, UPMC Univ Paris 06, CNRS, Laboratoire des Biomolecules (LBM), 24 rue Lhomond, 75005 Paris, France
| | - Barry Lai
- X-ray Science Division, Argonne National Laboratory (ANL) , Argonne, Illinois 60439, United States
| | - Florian Chain
- Commensal and Probiotics-Host Interactions Laboratory, Micalis Institute, INRA, AgroParisTech, Université Paris-Saclay, F-78350 Jouy-en-Josas, France
| | - Philippe Langella
- Commensal and Probiotics-Host Interactions Laboratory, Micalis Institute, INRA, AgroParisTech, Université Paris-Saclay, F-78350 Jouy-en-Josas, France
| | - Maria Bachelet
- Sorbonne Universites, UPMC Univ Paris 06 - Département de Chimie, Ecole Normale Superieure, PSL Research University - CNRS, INSERM, APHP, INRA, Laboratoire des Biomolecules (LBM), 27 rue de Chaligny, 75012 Paris, France.,Commensal and Probiotics-Host Interactions Laboratory, Micalis Institute, INRA, AgroParisTech, Université Paris-Saclay, F-78350 Jouy-en-Josas, France
| | - Joelle Masliah
- Département de Chimie, Ecole Normale Superieure, PSL Research University, UPMC Univ Paris 06, CNRS, Laboratoire des Biomolecules (LBM), 24 rue Lhomond, 75005 Paris, France.,Sorbonne Universites, UPMC Univ Paris 06 - Département de Chimie, Ecole Normale Superieure, PSL Research University - CNRS, INSERM, APHP, INRA, Laboratoire des Biomolecules (LBM), 27 rue de Chaligny, 75012 Paris, France
| | - Philippe Seksik
- Sorbonne Universites, UPMC Univ Paris 06 - Département de Chimie, Ecole Normale Superieure, PSL Research University - CNRS, INSERM, APHP, INRA, Laboratoire des Biomolecules (LBM), 27 rue de Chaligny, 75012 Paris, France.,Commensal and Probiotics-Host Interactions Laboratory, Micalis Institute, INRA, AgroParisTech, Université Paris-Saclay, F-78350 Jouy-en-Josas, France
| | - Clotilde Policar
- Département de Chimie, Ecole Normale Superieure, PSL Research University, UPMC Univ Paris 06, CNRS, Laboratoire des Biomolecules (LBM), 24 rue Lhomond, 75005 Paris, France
| |
Collapse
|
14
|
|
15
|
Ching HV, Kenkel I, Delsuc N, Mathieu E, Ivanović-Burmazović I, Policar C. Bioinspired superoxide-dismutase mimics: The effects of functionalization with cationic polyarginine peptides. J Inorg Biochem 2016; 160:172-9. [DOI: 10.1016/j.jinorgbio.2016.01.025] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Revised: 12/27/2015] [Accepted: 01/25/2016] [Indexed: 10/22/2022]
|
16
|
Liu W, Shao J, Lian WJ, Xie CZ, Xu JY. Synthesis, Structure, DNA Binding, and Magnetic Properties of Dicobalt (II/III, III/III) Complexes Based on 5-(1H-benzo[d]imidazol-2-yl)-1H-imidazole-4-carboxylic Ligand. ACTA ACUST UNITED AC 2016. [DOI: 10.1080/15533174.2015.1137016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Wei Liu
- The Second Hospital of Tianjin Medical University, Tianjin, P. R. China
| | - Jia Shao
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin, P. R. China
| | - Wen-Jing Lian
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin, P. R. China
| | - Cheng-Zhi Xie
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin, P. R. China
| | - Jing-Yuan Xu
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin, P. R. China
| |
Collapse
|
17
|
Fernández E, Hostachy S, Sandt C, Rodríguez G, Bertrand HC, Clède S, Cócera M, Maza ADL, Lambert F, Policar C, López O. Monitoring bicosomes containing antioxidants in normal and irradiated skin. RSC Adv 2016. [DOI: 10.1039/c6ra11170j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Monitoring penetration of bicosomes containing antioxidants into normal and irradiated skin by FTIR.
Collapse
Affiliation(s)
| | - Sarah Hostachy
- École Normale Supérieure – PSL Research University
- Département de Chimie Sorbornne Universités – UPMC UNIV Paris 06
- CNRS UMR 7203 LBM
- 75005 Paris
- France
| | | | | | - Helene C. Bertrand
- École Normale Supérieure – PSL Research University
- Département de Chimie Sorbornne Universités – UPMC UNIV Paris 06
- CNRS UMR 7203 LBM
- 75005 Paris
- France
| | - Sylvain Clède
- École Normale Supérieure – PSL Research University
- Département de Chimie Sorbornne Universités – UPMC UNIV Paris 06
- CNRS UMR 7203 LBM
- 75005 Paris
- France
| | | | - Alfonso de la Maza
- Institute of Advanced Chemistry of Catalonia (IQAC-CSIC)
- 08034 Barcelona
- Spain
| | - François Lambert
- École Normale Supérieure – PSL Research University
- Département de Chimie Sorbornne Universités – UPMC UNIV Paris 06
- CNRS UMR 7203 LBM
- 75005 Paris
- France
| | - Clotilde Policar
- École Normale Supérieure – PSL Research University
- Département de Chimie Sorbornne Universités – UPMC UNIV Paris 06
- CNRS UMR 7203 LBM
- 75005 Paris
- France
| | - Olga López
- Institute of Advanced Chemistry of Catalonia (IQAC-CSIC)
- 08034 Barcelona
- Spain
| |
Collapse
|
18
|
Bian HD, Wang J, Wei Y, Tang J, Huang FP, Yao D, Yu Q, Liang H. Superoxide dismutase activity studies of Mn(III)/Cu(II)/Ni(II) complexes with Schiff base ligands. Polyhedron 2015. [DOI: 10.1016/j.poly.2015.01.022] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
|
19
|
Ledesma GN, Eury H, Anxolabéhère-Mallart E, Hureau C, Signorella SR. A new mononuclear manganese(III) complex of an unsymmetrical hexadentate N3O3 ligand exhibiting superoxide dismutase and catalase-like activity: synthesis, characterization, properties and kinetics studies. J Inorg Biochem 2015; 146:69-76. [PMID: 25771435 DOI: 10.1016/j.jinorgbio.2015.02.012] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2014] [Revised: 02/20/2015] [Accepted: 02/20/2015] [Indexed: 11/28/2022]
Abstract
A mononuclear Mn(III) complex MnL·4H2O (H3L=1-[N-(2-pyridylmethyl),N-(2-hydroxybenzyl)amino]-3-[N'-(2-hydroxybenzyl),N'-(4-methylbenzyl)amino]propan-2-ol) has been prepared and characterized. This complex catalyzes the dismutation of superoxide efficiently, with catalytic rate constant kcat=1.7×10(6)M(-1)s(-1) and IC50 1.26μM, obtained through the nitro blue tetrazolium photoreduction inhibition superoxide dismutase assay, in aqueous solution of pH7.8. MnL is also able to disproportionate more than 300 equivalents of H2O2 in CH3CN, with initial rate of H2O2 decomposition given by ri=kcat [MnL](2) [H2O2] and kcat=1.32(2)mM(-2)min(-1). The accessibility of the Mn(IV) state (E(p)=0.53V vs. saturated calomel electrode), suggests MnL employs a high-valent catalytic cycle to decompose O2(-) and H2O2.
Collapse
Affiliation(s)
- Gabriela N Ledesma
- IQUIR (Instituto de Química Rosario), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, (S2002LRK), Rosario, Argentina
| | - Hélène Eury
- Laboratoire de Chimie de Coordination, UPR CNRS 8241, 205 Route de Narbonne, 31077 Toulouse Cedex 04, France; Université de Toulouse; UPS, INPT, LCC, F-31077 Toulouse, France
| | - Elodie Anxolabéhère-Mallart
- Laboratoire d'Electrochimie Moléculaire UMR CNRS-P7 7591 Université Paris Diderot-Paris, 15 rue Jean-Antoine de Baïf, 75205 Paris Cedex 13, France
| | - Christelle Hureau
- Laboratoire de Chimie de Coordination, UPR CNRS 8241, 205 Route de Narbonne, 31077 Toulouse Cedex 04, France; Université de Toulouse; UPS, INPT, LCC, F-31077 Toulouse, France
| | - Sandra R Signorella
- IQUIR (Instituto de Química Rosario), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, (S2002LRK), Rosario, Argentina.
| |
Collapse
|
20
|
Ching HYV, Anxolabéhère-Mallart E, Colmer HE, Costentin C, Dorlet P, Jackson TA, Policar C, Robert M. Electrochemical formation and reactivity of a manganese peroxo complex: acid driven H2O2 generation vs. O–O bond cleavage. Chem Sci 2014. [DOI: 10.1039/c3sc53469c] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
21
|
Tzima TD, Ferentinos E, Maganas D, Melissas VS, Sanakis Y, Kyritsis P. Electronic and magnetic properties of the binuclear [Mn2{(OPPh2)2N}4] complex, as revealed by magnetometry, EPR and density functional broken-symmetry studies. Polyhedron 2013. [DOI: 10.1016/j.poly.2012.07.084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
22
|
Synthesis, characterization, DNA binding properties and antioxidant activity of a manganese(II) complex with NO6 chromophore. J Inorg Biochem 2013; 118:48-58. [DOI: 10.1016/j.jinorgbio.2012.09.015] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2012] [Revised: 09/11/2012] [Accepted: 09/12/2012] [Indexed: 11/19/2022]
|
23
|
Chen W, Chen J, Feng YB, Hong L, Chen QY, Wu LF, Lin XH, Xia XH. Peroxidase-like activity of water-soluble cupric oxide nanoparticles and its analytical application for detection of hydrogen peroxide and glucose. Analyst 2012; 137:1706-12. [DOI: 10.1039/c2an35072f] [Citation(s) in RCA: 258] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
24
|
Bernard AS, Giroud C, Ching HYV, Meunier A, Ambike V, Amatore C, Collignon MG, Lemaître F, Policar C. Evaluation of the anti-oxidant properties of a SOD-mimic Mn-complex in activated macrophages. Dalton Trans 2012; 41:6399-403. [DOI: 10.1039/c2dt12479c] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
|
25
|
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]
|
26
|
Anxolabéhère-Mallart E, Costentin C, Policar C, Robert M, Savéant JM, Teillout AL. Proton-coupled electron transfers in biomimetic water bound metal complexes. The electrochemical approach. Faraday Discuss 2011; 148:83-95; discussion 97-108. [DOI: 10.1039/c004276e] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
|
27
|
Transition metal complexes with Girard reagent-based ligands. Part V. Synthesis, characterization and crystal structure of pentagonal-bipyramidal manganese(II) complex with 2,6-diacetylpyridine bis(Girard-T hydrazone). INORG CHEM COMMUN 2010. [DOI: 10.1016/j.inoche.2010.06.022] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
28
|
Lassalle-Kaiser B, Hureau C, Pantazis DA, Pushkar Y, Guillot R, Yachandra VK, Yano J, Neese F, Anxolabéhère-Mallart E. Activation of a water molecule using a mononuclear Mn complex: from Mn-aquo, to Mn-hydroxo, to Mn-oxyl via charge compensation. ENERGY & ENVIRONMENTAL SCIENCE 2010; 3:924-938. [PMID: 24772190 PMCID: PMC3997265 DOI: 10.1039/b926990h] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Activation of a water molecule by the electrochemical oxidation of a Mn-aquo complex accompanied by the loss of protons is reported. The sequential (2 × 1 electron/1 proton) and direct (2 electron/2 proton) proton-coupled electrochemical oxidation of a non-porphyrinic six-coordinated Mn(II)OH2 complex into a mononuclear Mn(O) complex is described. The intermediate Mn(III)OH2 and Mn(III)OH complexes are electrochemically prepared and analysed. Complete deprotonation of the coordinated water molecule in the Mn(O) complex is confirmed by electrochemical data while the analysis of EXAFS data reveals a gradual shortening of an Mn-O bond upon oxidation from Mn(II)OH2 to Mn(III)OH and Mn(O). Reactivity experiments, DFT calculations and XANES pre-edge features provide strong evidence that the bonding in Mn(O) is best characterized by a Mn(III)-oxyl description. Such oxyl species could play a crucial role in natural and artificial water splitting reactions. We provide here a synthetic example for such species, obtained by electrochemical activation of a water ligand.
Collapse
Affiliation(s)
- Benedikt Lassalle-Kaiser
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO), UMR–CNRS 8182, Univ Paris Sud 11, F-91405 Orsay, France
| | - Christelle Hureau
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205 Route de Narbonne, 31077 Toulouse, France, Université de Toulouse, UPS, INPT, LCC, 31077 Toulouse, France. ; Fax: +33(0)5 61 33 30 03; Tel: +33(0)5 61 33 31 20
| | - Dimitrios A. Pantazis
- Institute for Physical and Theoretical Chemistry, University of Bonn, Wegelerstrasse 12, D-53115 Bonn, Germany, Max-Planck Institute for Bioinorganic Chemistry, Stiftstr.32-34, D-45470 Mulheim an der Ruhr, Germany
| | - Yulia Pushkar
- Physical Biosciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Rd., Berkeley, CA, 94720, USA
| | - Régis Guillot
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO), UMR–CNRS 8182, Univ Paris Sud 11, F-91405 Orsay, France. ; Fax: +33 5(0)169 15 47 54; Tel: + 33(0)1 69 15 47 52
| | - Vittal K. Yachandra
- Physical Biosciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Rd., Berkeley, CA, 94720, USA
| | - Junko Yano
- Physical Biosciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Rd., Berkeley, CA, 94720, USA
| | - Frank Neese
- Institute for Physical and Theoretical Chemistry, University of Bonn, Wegelerstrasse 12, D-53115 Bonn, Germany, Max-Planck Institute for Bioinorganic Chemistry, Stiftstr.32-34, D-45470 Mulheim an der Ruhr, Germany
| | - Elodie Anxolabéhère-Mallart
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO), UMR–CNRS 8182, Univ Paris Sud 11, F-91405 Orsay, France
| |
Collapse
|
29
|
Singla M, Mathur P. Oxidation of alcohols using a manganese (II) complex based on a pentakis benzimidazole amide ligand. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2009; 74:536-543. [PMID: 19660981 DOI: 10.1016/j.saa.2009.07.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2008] [Revised: 05/13/2009] [Accepted: 07/01/2009] [Indexed: 05/28/2023]
Abstract
A pentakis benzimidazole based penta-amide ligand diethylenetriamine-N,N,N',N',N''-pentakis(2-methyl benzimidazolyl)penta-amide [GBDTPA] has been synthesized and utilized to prepare Mn (II) complexes of general composition [Mn(2)(GBDTPA)X(4)], where X is an exogenous anionic ligand (X = Cl(-), NO(3)(-) and Br(-)). The oxidation of alcohols has been investigated using [Mn(2)(GBDTPA)Cl(4)] as the catalyst and TBHP as an alternate source of oxygen. The respective aldehydic products have been isolated and characterized by (1)H NMR.
Collapse
Affiliation(s)
- Manisha Singla
- Department of Chemistry, Delhi University, Delhi 110007, India.
| | | |
Collapse
|
30
|
Groni S, Hureau C, Guillot R, Blondin G, Blain G, Anxolabéhère-Mallart E. Characterizations of chloro and aqua Mn(II) mononuclear complexes with amino-pyridine ligands. Comparison of their electrochemical properties with those of Fe(II) counterparts. Inorg Chem 2009; 47:11783-97. [PMID: 19007154 DOI: 10.1021/ic8015172] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The solution behavior of mononuclear Mn(II) complexes, namely, [(L(5)(2))MnCl](+) (1), [(L(5)(3))MnCl](+) (2), [(L(5)(2))Mn(OH(2))](2+) (3), [(L(5)(3))Mn(OH(2))](2+) (4), and [(L(6)(2))Mn(OH(2))](2+) (6), with L(5)(2/3) and L(6)(2) being penta- and hexadentate amino-pyridine ligands, is investigated in MeCN using EPR, UV-vis spectroscopies, and electrochemistry. The addition of one chloride ion onto species 6 leads to the formation of the complex [(L(6)(2))MnCl](+) (5) that is X-ray characterized. EPR and UV-vis spectra indicate that structure and redox states of complexes 1-6 are maintained in MeCN solution. Chloro complexes 1, 2, and 5 show reversible Mn(II)/Mn(III) process at 0.95, 1.02, and 1.05 V vs SCE, respectively, whereas solvated complexes 3, 4, and 6 show an irreversible anodic peak around 1.5 V vs SCE. Electrochemical oxidations of 1 and 5 leading to the Mn(III) complexes [(L(5)(2))MnCl](2+) (7) and [(L(6)(2))MnCl](2+) (8) are successful. The UV-vis signatures of 7 and 8 show features associated with chloro to Mn(III) LMCT and d-d transitions. The X-ray characterization of the heptacoordinated Mn(III) species 8 is also reported. The analogous electrochemical generation of the corresponding Mn(III) complex was not possible when starting from 2. The new mixed-valence di-mu-oxo [(L(5)(2))Mn(muO)(2)Mn(L(5)(2))](3+) species (9) can be obtained from 3, whereas the sister [(L(5)(3))Mn(muO)(2)Mn(L(5)(3))](3+) species can not be generated from 4. Such different responses upon oxidations are commented on with the help of comparison with related Mn/Fe complexes and are discussed in relation with the size of the metallacycle formed between the diamino bridge and the metal center (5- vs 6-membered). Lastly, a comparison between redox potentials of the studied Mn(II) complexes with those of Fe(II) analogues is drawn and completed with previously reported data on Mn/Fe isostructural systems. This gives us the opportunity to get some indirect insights into the metal specificity encountered in enzymes among which superoxide dismutase is the archetypal model.
Collapse
Affiliation(s)
- Sihem Groni
- Equipe de Chimie Inorganique, Institut de Chimie Moléculaire et des Matériaux d'Orsay, Université Paris-Sud 11, UMR 8182 CNRS, Orsay F-91405, France
| | | | | | | | | | | |
Collapse
|
31
|
Park W, Lim D. Effect of the oligo(ethylene glycol) group on the antioxidant activity of manganese salen complexes. Bioorg Med Chem Lett 2008; 19:614-7. [PMID: 19124240 DOI: 10.1016/j.bmcl.2008.12.063] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2008] [Revised: 11/15/2008] [Accepted: 12/16/2008] [Indexed: 01/08/2023]
Abstract
The synthesis and antioxidant activity of oligo(ethylene glycol)-modified manganese salen complexes are reported. Their SOD activities were similar and 2- to 3-fold more potent than the standard compound EUK-134. Their catalase-like activity was lower than that of EUK-134 in the initial conversion rate; however, some analogs exhibited a better catalytic turnover number.
Collapse
Affiliation(s)
- Wonchoul Park
- Department of Chemistry, Sejong University, Kwang-Jin Ku, Kunja-Dong, 98, Seoul 143-747, Republic of Korea
| | | |
Collapse
|
32
|
Ivanović-Burmazović I, van Eldik R. Metal complex-assisted activation of small molecules. From NO to superoxide and peroxides. Dalton Trans 2008:5259-75. [DOI: 10.1039/b805450a] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
|