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Móran Plata MJ, Marretta L, Gaztelumendi L, Pieslinger GE, Carballo RR, Rezabal E, Barone G, Martínez-Martínez V, Terenzi A, Salassa L. Alloxazine-Based Ligands and Their Ruthenium Complexes as NADH Oxidation Catalysts and G4 Binders. Inorg Chem 2024; 63:16362-16373. [PMID: 39151171 DOI: 10.1021/acs.inorgchem.4c02314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/18/2024]
Abstract
Flavin-like ligands (L-1 and L-2) with extended π-conjugation were synthesized using microwave-assisted techniques. An N,N-chelating fragment was integrated into alloxazine units, providing binding sites for metal ions while retaining redox activity. The complexation capability of L-1 and L-2 with two prototypical Ru-scaffolds was examined to design Ru(II) complexes (M-1 and M-2), whose electronic properties were studied and compared with their corresponding ligands via absorption and emission spectroscopy, computational analysis (density functional theory (DFT) and time-dependent DFT (TD-DFT)), and cyclic voltammetry (CV). The ability of L-1 and M-1 to undergo alloxazine/isoalloxazine tautomerization was demonstrated to play a crucial role in the photocatalytic oxidation of NADH, including under green and red wavelengths. Moreover, the interaction of M-1 and M-2 with B-DNA and G-quadruplex structures was investigated. M-2 showed high stabilization of Kit1 and h-Telo oligonucleotides. Meanwhile, M-1 demonstrated switchable emissive properties with B-DNA and induced conformational changes in the h-Telo G-quadruplex structure.
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Affiliation(s)
- Maria Jesus Móran Plata
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, Donostia 20018, Spain
- Polimero eta Material Aurreratuak: Fisika, Kimika eta Teknologia, Kimika Fakultatea, Euskal Herriko Unibertsitatea UPV/EHU, Paseo Manuel de Lardizabal 3, Donostia 20018, Spain
| | - Laura Marretta
- Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche, University of Palermo, viale delle Scienze Edificio 17, Palermo 90128, Italy
| | - Lander Gaztelumendi
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, Donostia 20018, Spain
- Polimero eta Material Aurreratuak: Fisika, Kimika eta Teknologia, Kimika Fakultatea, Euskal Herriko Unibertsitatea UPV/EHU, Paseo Manuel de Lardizabal 3, Donostia 20018, Spain
| | - German E Pieslinger
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, Donostia 20018, Spain
- CONICET─Universidad de Buenos Aires, Instituto de Química y Fisicoquímica Biológicas (IQUIFIB), Buenos Aires 1113, Argentina
| | - Romina R Carballo
- CONICET─Universidad de Buenos Aires, Instituto de Química y Fisicoquímica Biológicas (IQUIFIB), Buenos Aires 1113, Argentina
| | - Elixabete Rezabal
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, Donostia 20018, Spain
- Polimero eta Material Aurreratuak: Fisika, Kimika eta Teknologia, Kimika Fakultatea, Euskal Herriko Unibertsitatea UPV/EHU, Paseo Manuel de Lardizabal 3, Donostia 20018, Spain
| | - Giampaolo Barone
- Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche, University of Palermo, viale delle Scienze Edificio 17, Palermo 90128, Italy
| | | | - Alessio Terenzi
- Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche, University of Palermo, viale delle Scienze Edificio 17, Palermo 90128, Italy
| | - Luca Salassa
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, Donostia 20018, Spain
- Polimero eta Material Aurreratuak: Fisika, Kimika eta Teknologia, Kimika Fakultatea, Euskal Herriko Unibertsitatea UPV/EHU, Paseo Manuel de Lardizabal 3, Donostia 20018, Spain
- Ikerbasque, Basque Foundation for Science, Bilbao 48011, Spain
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2
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Das A, Charpentier O, Hessin C, Schleinitz J, Pianca D, Le Breton N, Choua S, Grimaud L, Gourlaouen C, Desage-El Murr M. Site-Selective Radical Aromatic C-H Functionalization of Alloxazine and Flavin through Ground-State Single Electron Transfer. Angew Chem Int Ed Engl 2024; 63:e202403417. [PMID: 38627209 DOI: 10.1002/anie.202403417] [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: 02/18/2024] [Indexed: 06/11/2024]
Abstract
Flavins and their alloxazine isomers are key chemical scaffolds for bioinspired electron transfer strategies. Their properties can be fine-tuned by functional groups, which must be introduced at an early stage of the synthesis as their aromatic ring is inert towards post-functionalization. We show that the introduction of a remote metal-binding redox site on alloxazine and flavin activates their aromatic ring towards direct C-H functionalization. Mechanistic studies are consistent with a synthetic sequence involving ground-state single electron transfer (SET) with an electrophilic source followed by radical-radical coupling. This unprecedented reactivity opens new opportunities in molecular editing of flavins by direct aromatic post-functionalization and the utility of the method is demonstrated with the site-selective C6 functionalization of alloxazine and flavin with a CF3 group, Br or Cl, that can be further elaborated into OH and aryl for chemical diversification.
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Affiliation(s)
- Agnideep Das
- Université de Strasbourg, Institut de Chimie, CNRS UMR7177, 4, rue Blaise Pascal, 67000, Strasbourg, France
| | - Oscar Charpentier
- Université de Strasbourg, Institut de Chimie, CNRS UMR7177, 4, rue Blaise Pascal, 67000, Strasbourg, France
| | - Cheriehan Hessin
- Université de Strasbourg, Institut de Chimie, CNRS UMR7177, 4, rue Blaise Pascal, 67000, Strasbourg, France
| | - Jules Schleinitz
- Laboratoire des biomolécules, LBM, Chemistry department École Normale Supérieure, PSL University, Sorbonne Université, CNRS, 75005, Paris, France
| | - David Pianca
- Université de Strasbourg, Institut de Chimie, CNRS UMR7177, 4, rue Blaise Pascal, 67000, Strasbourg, France
| | - Nolwenn Le Breton
- Université de Strasbourg, Institut de Chimie, CNRS UMR7177, 4, rue Blaise Pascal, 67000, Strasbourg, France
| | - Sylvie Choua
- Université de Strasbourg, Institut de Chimie, CNRS UMR7177, 4, rue Blaise Pascal, 67000, Strasbourg, France
| | - Laurence Grimaud
- Laboratoire des biomolécules, LBM, Chemistry department École Normale Supérieure, PSL University, Sorbonne Université, CNRS, 75005, Paris, France
| | - Christophe Gourlaouen
- Université de Strasbourg, Institut de Chimie, CNRS UMR7177, 4, rue Blaise Pascal, 67000, Strasbourg, France
| | - Marine Desage-El Murr
- Université de Strasbourg, Institut de Chimie, CNRS UMR7177, 4, rue Blaise Pascal, 67000, Strasbourg, France
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3
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Casas J, Pianca D, Le Breton N, Jouaiti A, Gourlaouen C, Desage-El Murr M, Le Vot S, Choua S, Ferlay S. Alloxazine-Based Ligands Appended with Coordinating Groups: Synthesis, Electrochemical Studies, and Formation of Coordination Polymers. Inorg Chem 2024; 63:4802-4806. [PMID: 38428038 DOI: 10.1021/acs.inorgchem.3c04550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2024]
Abstract
Three new ligands based on the alloxazine core appended with pyridyl coordinating groups have been designed, synthesized, and characterized. The ligands are revealed to be redox-active in DMF solution, as attested to by CV and combined CV/EPR studies. The spin of the reduced species appears to be delocalized on the alloxazine core, as attested to by DFT calculations. The coordination abilities of one of the ligands toward Cu2+ or Ni2+ 3d cations revealed the formation of the first alloxazine-based 3D coordination polymers, presenting strong π-π stacking and substantial cavities. Preliminarily charge/discharge experiments in Li batteries evidence Li+ insertion in such systems.
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Affiliation(s)
- Jaison Casas
- CNRS, CMC UMR 7140, Université de Strasbourg, 4 rue Blaise Pascal, CS 90032, Strasbourg 67081, Cedex, France
| | - David Pianca
- Institut de Chimie, UMR CNRS 7177, Université de Strasbourg, Institut Le Bel, 4 rue Blaise Pascal, Strasbourg 67000, France
| | - Nolwenn Le Breton
- Institut de Chimie, UMR CNRS 7177, Université de Strasbourg, Institut Le Bel, 4 rue Blaise Pascal, Strasbourg 67000, France
| | - Abdelaziz Jouaiti
- CNRS, CMC UMR 7140, Université de Strasbourg, 4 rue Blaise Pascal, CS 90032, Strasbourg 67081, Cedex, France
| | - Christophe Gourlaouen
- Institut de Chimie, UMR CNRS 7177, Université de Strasbourg, Institut Le Bel, 4 rue Blaise Pascal, Strasbourg 67000, France
| | - Marine Desage-El Murr
- Institut de Chimie, UMR CNRS 7177, Université de Strasbourg, Institut Le Bel, 4 rue Blaise Pascal, Strasbourg 67000, France
| | - Steven Le Vot
- Institut Charles Gerhardt Montpellier (ICGM), Université de Montpellier, CNRS, ENSCM, Montpellier 34000, France
- Réseau sur le Stockage Électrochimique de l'Énergie (RS2E), CNRS, Amiens 80000, France
| | - Sylvie Choua
- Institut de Chimie, UMR CNRS 7177, Université de Strasbourg, Institut Le Bel, 4 rue Blaise Pascal, Strasbourg 67000, France
| | - Sylvie Ferlay
- CNRS, CMC UMR 7140, Université de Strasbourg, 4 rue Blaise Pascal, CS 90032, Strasbourg 67081, Cedex, France
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4
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Ciavardini A, Galdenzi F, Coreno M, Ninno GD, Grazioli C, de Simone M, Totani R, Piccirillo S, Plekan O, Ponzi A. Valence and core-level X-ray photoemission spectroscopy of light-sensitive molecules: Lumazine and alloxazine. Chem Phys 2022. [DOI: 10.1016/j.chemphys.2022.111757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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5
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Vinod Mouli MSS, Kumar Mishra A. Divergent Crystallographic Architecture for Silver‐Flavin Complexes Induced via pH Variation. ChemistrySelect 2022. [DOI: 10.1002/slct.202202126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- M. S. S. Vinod Mouli
- Department of Chemistry Indian Institute of Technology Hyderabad Kandi Sangareddy 502285 Telangana
| | - Ashutosh Kumar Mishra
- Department of Chemistry Indian Institute of Technology Hyderabad Kandi Sangareddy 502285 Telangana
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6
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Das A, Schleinitz J, Karmazin L, Vincent B, Le Breton N, Rogez G, Guenet A, Choua S, Grimaud L, Desage‐El Murr M. A Single Bioinspired Hexameric Nickel Catechol–Alloxazine Catalyst Combines Metal and Radical Mechanisms for Alkene Hydrosilylation. Chemistry 2022; 28:e202200596. [DOI: 10.1002/chem.202200596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Indexed: 11/12/2022]
Affiliation(s)
- Agnideep Das
- Université de Strasbourg Institut de Chimie, CNRS UMR7177 67000 Strasbourg France
| | - Jules Schleinitz
- Laboratoire des biomolécules LBM, Chemistry Department École normale supérieure PSL University Sorbonne Université, CNRS 75005 Paris France
| | - Lydia Karmazin
- Université de Strasbourg Institut de Chimie, CNRS UMR7177 67000 Strasbourg France
| | - Bruno Vincent
- Université de Strasbourg Institut de Chimie, CNRS UMR7177 67000 Strasbourg France
| | - Nolwenn Le Breton
- Université de Strasbourg Institut de Chimie, CNRS UMR7177 67000 Strasbourg France
| | - Guillaume Rogez
- Institut de Physique et Chimie des Matériaux de Strasbourg Université de Strasbourg, CNRS, UMR 7504 67000 Strasbourg France
| | - Aurélie Guenet
- Université de Strasbourg Institut de Chimie, CNRS UMR7177 67000 Strasbourg France
| | - Sylvie Choua
- Université de Strasbourg Institut de Chimie, CNRS UMR7177 67000 Strasbourg France
| | - Laurence Grimaud
- Laboratoire des biomolécules LBM, Chemistry Department École normale supérieure PSL University Sorbonne Université, CNRS 75005 Paris France
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7
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Zeghouan O, Mahesha, Sellami S, Kashi I, Bouchameni C, Lokanath N. Analysis of structural conformation and supramolecular self-assembly of novel oxalate-bridged tetranuclear Cu(II) complex by combined crystallographic and computational studies. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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8
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Makita Y, Kawaguchi SI, Fujiwara SI. Characterization and Antitumor Activity of Furazano[3,4-g]pteridine-2,4(1H,3H)-dione. HETEROCYCLES 2022. [DOI: 10.3987/com-21-14604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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9
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Mouli MSSV, Mishra AK. Formation of the silver-flavin coordination polymers and their morphological studies. CrystEngComm 2022. [DOI: 10.1039/d2ce00071g] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This Communication describes the formation of 1D-coordination polymeric motifs involving modified flavin analog connected together through intervening silver ions. Rare bidentate coordination mode for model flavin was achieved with silver...
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10
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Mouli MSSV, Mishra AK. Modulating catalytic activity of a modified flavin analogue via judicially positioned metal ion toward aerobic sulphoxidation. RSC Adv 2022; 12:3990-3995. [PMID: 35425444 PMCID: PMC8981109 DOI: 10.1039/d1ra06558k] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Accepted: 11/15/2021] [Indexed: 01/24/2023] Open
Abstract
This manuscript describes the synthesis, spectroscopic and crystallographic characterization of a cadmium complex of 10-propoylisoalloxazine-7-carboxylic acid (Flc-Cd). Catalytic activity of Flc-Cd towards aerobic sulphoxidation reaction was investigated in the presence of l-ascorbic acid as the reducing agent. Notably the neutral un-metalated flavin analogue did not show any significant catalytic activity. The design strategy for Flc provides a close proximity of the metal centre to the flavin core without compromising the catalytic site thereby assisting the product formation when compared to unmetallated Flc. Minor enantioselectivity is also observed in cases where unsymmetrical sulphides were used; indicative of the possible involvement of chiral l-ascorbic acid in the intermediate formation. Design and synthesis of a catalytically efficient metal-flavin complex toward aerobic sulphoxidation was achieved via judicially positioning the metal ion near the catalytic site thereby assisting the intermediate formation.![]()
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Affiliation(s)
- M. S. S. Vinod Mouli
- Department of Chemistry, Indian Institute of Technology-Hyderabad, Kandi-502284, India
| | - Ashutosh Kumar Mishra
- Department of Chemistry, Indian Institute of Technology-Hyderabad, Kandi-502284, India
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11
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Guo H, Lei Z, Ma X, Liu S, Qiu Y, Zhao J. Boosting Sulfides Photooxidation by Fusing Naphthalimide and Flavin together. Phys Chem Chem Phys 2022; 24:15255-15264. [DOI: 10.1039/d2cp01368a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Efficient and selective photocatalytic conversion of chemicals with visible light and naturally abundant resources has long been desired, but this requires finely designed sensitizers that are capable to convert light...
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12
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Liu J, Han S, Hu Y, Pao CW. Fabrication and characterization of a novel PMO containing riboflavin-5'-phosphate sodium salt for sensitive detection of pesticide ferbam. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.126375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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13
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Refat MS, Altalhi T, Hassan RF. Synthesis, spectroscopic, structural and morphological characterizations of magnesium(II), calcium(II), strontium(II) and barium(II) folate complexes. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.129519] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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14
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Răsădean DM, Machida T, Sada K, Pudney CR, Pantoș GD. Flavin mimetics: Synthesis and photophysical properties. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.131925] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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15
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Novel Gallium(III), Germanium(IV), and Hafnium(IV) Folate Complexes and Their Spectroscopic, Thermal Decomposition, Morphological, and Biological Characteristics. Bioinorg Chem Appl 2021; 2020:6678688. [PMID: 33414820 PMCID: PMC7769666 DOI: 10.1155/2020/6678688] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Accepted: 11/30/2020] [Indexed: 11/25/2022] Open
Abstract
In this study, we describe novel gallium(III), germanium(IV), and hafnium(IV) folate complexes, including their synthesis and analyses. The synthesized folate complexes were also subject to thermal analysis (TGA) to better examine their thermal degradation and kinetic properties. The folate complexes had high stability and were nonspontaneous. The Coats–Redfern and Horowitz–Metzger equations were used to determine thermodynamic parameters and describe the kinetic properties. These complexes were synthesized through the chemical interactions in neutralized media between the folic acid drug ligand (FAH2) with GaCl3, GeCl4, and HfCl4 metal salts at 1 : 2 (metal : ligand) molar ratio. The conductance measurements have low values due to their nonelectrolytic behavior. The X-ray powder diffraction solid powder pattern revealed a semicrystalline nature. In vitro, we screened the synthesized folate chelates for antibacterial and antifungal activities. The inhibition of four bacterial and two fungi pathogens (E. coli, B. subtilis, P. aeruginosa, S. aureus, A. flavus, and Candida albicans) was improved using a folic acid drug relative to the control drug.
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16
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Das A, Jobelius H, Schleinitz J, Gamboa-Ramirez S, Creste G, Kervern G, Raya J, Le Breton N, Guénet A, Boubegtiten-Fezoua Z, Grimaud L, Orio M, Rogez G, Hellwig P, Choua S, Ferlay S, Desage-El Murr M. A hybrid bioinspired catechol-alloxazine triangular nickel complex stabilizing protons and electrons. Inorg Chem Front 2021. [DOI: 10.1039/d1qi01131f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A new class of redox-active ligands merging catechol and alloxazine structures is reported. A trimetallic triangular complex is formed upon complexation to nickel.
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Affiliation(s)
- Agnideep Das
- Université de Strasbourg, Institut de Chimie, CNRS UMR7177, 67000 Strasbourg, France
| | - Hannah Jobelius
- Université de Strasbourg, Institut de Chimie, CNRS UMR7177, 67000 Strasbourg, France
- Université de Strasbourg, Chimie de la Matière Complexe, CNRS UMR7140, 67000 Strasbourg, France
| | - Jules Schleinitz
- Laboratoire des biomolécules, LBM, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, 75005 Paris, France
| | | | - Geordie Creste
- Université de Strasbourg, Institut de Chimie, CNRS UMR7177, 67000 Strasbourg, France
| | - Gwendal Kervern
- Université de Lorraine, Faculté des Sciences, boulevard des Aiguillettes, CNRS UMR7036, BP 70239, 54506 Vandoeuvre-les-Nancy Cedex, France
| | - Jesus Raya
- Université de Strasbourg, Institut de Chimie, CNRS UMR7177, 67000 Strasbourg, France
| | - Nolwenn Le Breton
- Université de Strasbourg, Institut de Chimie, CNRS UMR7177, 67000 Strasbourg, France
| | - Aurélie Guénet
- Université de Strasbourg, Institut de Chimie, CNRS UMR7177, 67000 Strasbourg, France
| | | | - Laurence Grimaud
- Laboratoire des biomolécules, LBM, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, 75005 Paris, France
| | - Maylis Orio
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille, France
| | - Guillaume Rogez
- Institut de Physique et Chimie des Matériaux de Strasbourg, Université de Strasbourg, CNRS, UMR 7504, F-67000 Strasbourg, France
| | - Petra Hellwig
- Université de Strasbourg, Chimie de la Matière Complexe, CNRS UMR7140, 67000 Strasbourg, France
| | - Sylvie Choua
- Université de Strasbourg, Institut de Chimie, CNRS UMR7177, 67000 Strasbourg, France
| | - Sylvie Ferlay
- Université de Strasbourg, Chimie de la Matière Complexe, CNRS UMR7140, 67000 Strasbourg, France
| | - Marine Desage-El Murr
- Université de Strasbourg, Institut de Chimie, CNRS UMR7177, 67000 Strasbourg, France
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17
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Guo L, Chen Y, Wang T, Yuan Y, Yang Y, Luo X, Hu S, Ding J, Zhou W. Rational design of metal-organic frameworks to deliver methotrexate for targeted rheumatoid arthritis therapy. J Control Release 2020; 330:119-131. [PMID: 33333119 DOI: 10.1016/j.jconrel.2020.10.069] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 10/13/2020] [Accepted: 10/28/2020] [Indexed: 01/01/2023]
Abstract
Methotrexate (MTX) has been used as an anchor drug for the treatment of rheumatoid arthritis (RA), while the patients with chronic MTX administration suffer from severe side-effects. To this end, targeted delivery of MTX by nanomedicine has attracted great interest. In this work, we aimed to employ metal-organic frameworks (MOFs) as nanocarrier to deliver MTX by virtue of its facile and green preparation and exceptionally high drug loading. While MTX could be easily and effectively loaded via different MOF construction strategies, such as direct coordination, physical encapsulation, and covalent conjugation, we found that most of the MTX loading MOFs showed premature and burst drug release, attributable to the unstable coordination between MTX and metals. To address this issue, we rationally designed the MOFs by conjugating MTX with tannic acid (TA) at 2:1 M ratio and then coordinating with ferric ion (Fe3+), followed by surface modification of hyaluronic acid (HA). The resulting MOFs achieved ultra-high drug loading (45%) and sustained drug release, and could selectively recognize the diseased cells for anti-inflammatory effect. The in vivo therapeutic evaluation suggested that the MOFs could enhance the anti-rheumatic activity of MTX while minimizing its toxic effects by targeted drug delivery, resulting in improved therapeutic index. This work provides a biocompatible nano-platform to deliver MTX for RA treatment, and importantly, calls for special attention to the gap between MOFs design and their biological applications, and the gap needs to be filled by careful evaluation of in vivo stability and burst drug release.
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Affiliation(s)
- Lina Guo
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, Hunan 410013, China
| | - Yang Chen
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, Hunan 410013, China
| | - Ting Wang
- Hunan Chidren's Hospital, Changsha, Hunan, 410007, China
| | - Yu Yuan
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, Hunan 410013, China
| | - Yihua Yang
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, Hunan 410013, China
| | - Xiaoli Luo
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, Hunan 410013, China
| | - Shuo Hu
- Department of Nuclear Medicine, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China; Key Laboratory of Biological Nanotechnology of National Health Commission, Changsha, Hunan 410008, China
| | - Jinsong Ding
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, Hunan 410013, China
| | - Wenhu Zhou
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, Hunan 410013, China; Department of Nuclear Medicine, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China; Key Laboratory of Biological Nanotechnology of National Health Commission, Changsha, Hunan 410008, China.
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18
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Yamaguchi I, Fujii N, Wang A. π-Conjugated polymer with Alloxazine-6,9-diyl unit in the Main chain: Synthesis, chemical properties, and sensing ability for metal ions and nucleosides. REACT FUNCT POLYM 2020. [DOI: 10.1016/j.reactfunctpolym.2020.104691] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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19
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Teimouri MB, Meydani A, Panji Z. A One-Pot Synthesis of 5-(1,3-Dimethyl-2,6-Dioxo-5-{[(1E)-Arylmethylene]Amino}-1,2,3,6-Tetrahydropyrimidin-4-yl)-1,3,7,9-Tetramethyl-5,10-Dihydropyrimido[5,4-g]Pteridine-2,4,6,8(1H,3H,7H,9H)-Tetrone via a Pseudo Four-Component Domino Reaction. Polycycl Aromat Compd 2019. [DOI: 10.1080/10406638.2019.1678182] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
| | - Ali Meydani
- Faculty of Chemistry, Kharazmi University, Tehran, Iran
| | - Zahra Panji
- Faculty of Chemistry, Kharazmi University, Tehran, Iran
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20
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Abstract
Redox-active unsaturated chelate ligands can be realised with different ring sizes of the resulting metallacycles. An overview is presented, starting from an exposition of non-innocent behaviour and chelate effects. A systematic approach is used to describe the most familiar situation, the metal complexes of 1,4-hetero-1,3-dienes in established forms (e.g. o-quinone, α-dithiolene, and α-diimine ligands) and with less common combinations of O, S, and N heteroatoms. The different steric and electronic conditions in six-membered chelate ring systems derived from the β-diketonate structure will be discussed with examples of substituted and π extended ligands, including 9-oxidophenalenyl, formazanate, and anions derived from indigo or 9,10-anthraquinone. Four-membered chelate rings existing in at least two ligand-based oxidation states are available through steric and electronic stabilisation in amidinate or triazenide complexes. Three-membered and seven-membered chelate ring situations are discussed briefly as further alternatives.
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Affiliation(s)
- Wolfgang Kaim
- Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70550 Stuttgart, Germany.
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21
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Booysen IN, Jadoo B, Akerman MP. Formation, characterization and computational studies of Lumazine Schiff base Rhenium(III) and –(V) complexes with carbohydrazide moieties. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.03.110] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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22
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Guo H, Zhu L, Dang C, Zhao J, Dick B. Synthesis and photophysical properties of ruthenium(ii) polyimine complexes decorated with flavin. Phys Chem Chem Phys 2018; 20:17504-17516. [DOI: 10.1039/c8cp02358a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Phosphorescent emission from a flavin localized triplet excited state (3IL) is observed for the first time in a flavin decorated tris(dipyridine) Ru(ii) complex with strong visible light absorption.
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Affiliation(s)
- Huimin Guo
- State Key Laboratory of Fine Chemicals
- School of Chemistry
- Dalian University of Technology
- Dalian
- P. R. China
| | - Lijuan Zhu
- State Key Laboratory of Fine Chemicals
- School of Chemistry
- Dalian University of Technology
- Dalian
- P. R. China
| | - Can Dang
- State Key Laboratory of Fine Chemicals
- School of Chemistry
- Dalian University of Technology
- Dalian
- P. R. China
| | - Jianzhang Zhao
- State Key Laboratory of Fine Chemicals
- School of Chemistry
- Dalian University of Technology
- Dalian
- P. R. China
| | - Bernhard Dick
- Institut für Physikalische und Theoretische Chemie
- Universität Regensburg
- Regensburg
- Germany
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23
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Interacting metal and ligand based open shell systems: Challenges for experiment and theory. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2016.12.008] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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24
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Ahmad I, Anwar Z, Ahmed S, Sheraz MA, Khattak SUR. Metal ion mediated photolysis reactions of riboflavin: A kinetic study. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2017; 173:231-239. [PMID: 28599240 DOI: 10.1016/j.jphotobiol.2017.05.033] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Revised: 04/20/2017] [Accepted: 05/22/2017] [Indexed: 11/18/2022]
Abstract
The effect of metal ion complexation on the photolysis of riboflavin (RF) using various metal ions (Ag+, Ni2+, Co2+, Fe2+, Ca2+, Cd2+, Cu2+, Mn2+, Pb2+, Mg2+, Zn2+, Fe3+) has been studied. Ultraviolet and visible spectral and fluorimetric evidence has been obtained to confirm the formation of metal-RF complexes. The kinetics of photolysis of RF in metal-RF complexes at pH7.0 has been evaluated. The apparent first-order rate constant (kobs) for the photolysis of RF and the formation of lumichrome (LC) and lumiflavin (LF) (0.001M phosphate buffer) and LC, LF and cyclodehydroriboflavin (CDRF) (0.2-0.4M phosphate buffer) have been determined. The values of kobs indicate that the rate of photolysis of RF is promoted by divalent and trivalent metal ions. The second-order rate constants (k' ) for the interaction of metal ions with RF are in the order: Zn2+>Mg2+>Pb2+>Mn2+>Cu2+>Cd2+>Fe2+>Ca2+>Fe3+>Co2+>Ni2+>Ag+. In phosphate buffer (0.2-0.4M), an increase in the metal ion concentration leads to a decrease in the formation of LC compared to that of CDRF by different pathways. The photoproducts of RF have been identified and RF and the photoproducts have simultaneously been assayed by a multicomponent spectrometric method. The mode of photolysis of RF in metal-RF complexes has been discussed.
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Affiliation(s)
- Iqbal Ahmad
- Baqai Institute of Pharmaceutical Sciences, Baqai Medical University, Super Highway, Gadap Road, Karachi 74600, Pakistan
| | - Zubair Anwar
- Baqai Institute of Pharmaceutical Sciences, Baqai Medical University, Super Highway, Gadap Road, Karachi 74600, Pakistan.
| | - Sofia Ahmed
- Baqai Institute of Pharmaceutical Sciences, Baqai Medical University, Super Highway, Gadap Road, Karachi 74600, Pakistan
| | - Muhammad Ali Sheraz
- Baqai Institute of Pharmaceutical Sciences, Baqai Medical University, Super Highway, Gadap Road, Karachi 74600, Pakistan
| | - Saif-Ur-Rehman Khattak
- Central Drug Laboratories, Ministry of Health, DRAP, Block-B, S.M.C.H., Karachi 74400, Pakistan
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25
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Vogler A. Photoluminescence of solid [Pt(II)(riboflavin)4]Cl2 at ambient conditions. Intraligand phosphorescence. INORG CHEM COMMUN 2017. [DOI: 10.1016/j.inoche.2016.12.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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26
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Ansari MA, Mandal A, Paretzki A, Beyer K, Kaim W, Lahiri GK. Isomeric Diruthenium Complexes of a Heterocyclic and Quinonoid Bridging Ligand: Valence and Spin Alternatives for the Metal/Ligand/Metal Arrangement. Inorg Chem 2016; 55:12357-12365. [DOI: 10.1021/acs.inorgchem.6b02245] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mohd. Asif Ansari
- Department
of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Abhishek Mandal
- Department
of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Alexa Paretzki
- Institut für
Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring
55, Stuttgart D-70550, Germany
| | - Katharina Beyer
- Institut für
Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring
55, Stuttgart D-70550, Germany
| | - Wolfgang Kaim
- Institut für
Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring
55, Stuttgart D-70550, Germany
| | - Goutam Kumar Lahiri
- Department
of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
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27
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Quantum chemical calculations, molecular dynamics simulation and experimental studies of using some azo dyes as corrosion inhibitors for iron. Part 1: Mono-azo dye derivatives. J Taiwan Inst Chem Eng 2016. [DOI: 10.1016/j.jtice.2016.09.015] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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28
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Mitome H, Ishizuka T, Kotani H, Shiota Y, Yoshizawa K, Kojima T. Mechanistic Insights into C–H Oxidations by Ruthenium(III)-Pterin Complexes: Impact of Basicity of the Pterin Ligand and Electron Acceptability of the Metal Center on the Transition States. J Am Chem Soc 2016; 138:9508-20. [DOI: 10.1021/jacs.6b03785] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hiroumi Mitome
- Department
of Chemistry, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8571, Japan
| | - Tomoya Ishizuka
- Department
of Chemistry, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8571, Japan
| | - Hiroaki Kotani
- Department
of Chemistry, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8571, Japan
| | - Yoshihito Shiota
- Institute
for Materials Chemistry and Engineering, Kyushu University, Motooka, Nishi-Ku, Fukuoka 819-0395, Japan
| | - Kazunari Yoshizawa
- Institute
for Materials Chemistry and Engineering, Kyushu University, Motooka, Nishi-Ku, Fukuoka 819-0395, Japan
| | - Takahiko Kojima
- Department
of Chemistry, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8571, Japan
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29
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30
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Inhibitive properties, thermodynamic, kinetics and quantum chemical calculations of polydentate Schiff base compounds as corrosion inhibitors for iron in acidic and alkaline media. INTERNATIONAL JOURNAL OF INDUSTRIAL CHEMISTRY 2015. [DOI: 10.1007/s40090-015-0039-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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31
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Organometal coordination by purines: Semi-chelate bonding of modified guanine and isocaffeine with bis(diorganylphosphino)ferrocene–copper. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2014.10.043] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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32
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Mondal P, Ray R, Das A, Lahiri GK. Revelation of Varying Bonding Motif of Alloxazine, a Flavin Analogue, in Selected Ruthenium(II/III) Frameworks. Inorg Chem 2015; 54:3012-21. [DOI: 10.1021/acs.inorgchem.5b00122] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Prasenjit Mondal
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, India 400076
| | - Ritwika Ray
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, India 400076
| | - Ankita Das
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, India 400076
| | - Goutam Kumar Lahiri
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, India 400076
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33
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Nagaj J, Kołkowska P, Bykowska A, Komarnicka UK, Kyzioł A, Jeżowska-Bojczuk M. Interaction of methotrexate, an anticancer agent, with copper(II) ions: coordination pattern, DNA-cleaving properties and cytotoxic studies. Med Chem Res 2015; 24:115-123. [PMID: 25589824 PMCID: PMC4284383 DOI: 10.1007/s00044-014-1074-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Accepted: 06/07/2014] [Indexed: 01/03/2023]
Abstract
The acid-base properties and the Cu(II) binding processes of methotrexate (MTX) were characterized by selected spectroscopic techniques and potentiometric measurements. The pH titration data showed that MTX behaves as a triprotic ligand. The deprotonation constants were determined for α-COOH and γ-COOH groups and (N1)H+ from the pteridine ring. Taking all the obtained results into consideration, a coordination pattern was proposed. The DNA-cleaving activity and reactive oxygen species (ROS) generation were investigated for both MTX and the Cu(II)-MTX system. The complex displayed a promising nuclease activity toward plasmid DNA in the presence of hydrogen peroxide. Interestingly, the induction of ROS, such as hydroxyl radicals, superoxide anions or singlet oxygen, was excluded and a different mechanism of DNA degradation was proposed. As MTX is now commonly used in anticancer therapy i.e. against lung cancer, basic cell-based studies were carried out to establish if its Cu(II) complex exhibits higher cytotoxic properties than the ligand alone. Activities of both compounds were also tested against colon carcinoma. Moreover, the determined values of IC50 were confronted with the cytotoxic activity of cisplatin.
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Affiliation(s)
- Justyna Nagaj
- Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383 Wrocław, Poland
| | - Paulina Kołkowska
- Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383 Wrocław, Poland
| | - Aleksandra Bykowska
- Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383 Wrocław, Poland
| | - Urszula K Komarnicka
- Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383 Wrocław, Poland
| | - Agnieszka Kyzioł
- Faculty of Chemistry, Jagiellonian University, R. Ingardena 3, 30-060 Kraków, Poland
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34
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Jana R, Lissner F, Kaim W. Coordinative Saturation of the Pterin Heterocycle by Ferrocenylcopper(I) Complex Fragments. Z Anorg Allg Chem 2014. [DOI: 10.1002/zaac.201400529] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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35
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Biologically inspired pteridine redox centres for rechargeable batteries. Nat Commun 2014; 5:5335. [DOI: 10.1038/ncomms6335] [Citation(s) in RCA: 203] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2014] [Accepted: 09/18/2014] [Indexed: 12/23/2022] Open
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36
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Kojima T, Kobayashi R, Ishizuka T, Yamakawa S, Kotani H, Nakanishi T, Ohkubo K, Shiota Y, Yoshizawa K, Fukuzumi S. Binding of Scandium Ions to Metalloporphyrin-Flavin Complexes for Long-Lived Charge Separation. Chemistry 2014; 20:15518-32. [DOI: 10.1002/chem.201403960] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2014] [Indexed: 11/08/2022]
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37
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Photolysis of Zn(8-quinolinolate)2(H2O)2 in non-aqueous solution. Photoactivation of hydrolysis. INORG CHEM COMMUN 2014. [DOI: 10.1016/j.inoche.2014.04.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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38
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Jana R, Sarkar B, Strobel S, Mobin SM, Kaim W, Fiedler J. Electrochemical Evidence for Hemilabile Coordination of 1,3-Dimethyllumazine to [1,1′-Bis(diorganophosphino)ferrocene]copper(I). Organometallics 2014. [DOI: 10.1021/om500039a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rajkumar Jana
- Institut für
Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring
55, D-70550 Stuttgart, Germany
| | - Biprajit Sarkar
- Institut für
Chemie und Biochemie, Freie Universität Berlin, Fabeckstraße
34-36, D-14195 Berlin, Germany
| | - Sabine Strobel
- Institut für
Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring
55, D-70550 Stuttgart, Germany
| | - Shaikh M. Mobin
- Discipline of Chemistry,
School of Basic Sciences, Indian Institute of Technology Indore, Indore 452017, India
| | - Wolfgang Kaim
- Institut für
Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring
55, D-70550 Stuttgart, Germany
| | - Jan Fiedler
- J. Heyrovský Institute of Physical Chemistry,
v.v.i., Academy of Sciences of the Czech Republic, Dolejškova
3, CZ-18223 Prague, Czech Republic
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39
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Abstract
(1)H-, (11)B-, (13)C-, (15)N-, (17)O-, (19)F-, and (31)P-NMR chemical shifts of flavocoenzymes and derivatives of it, as well as of alloxazines and isoalloxazinium salts, from NMR experiments performed under various experimental conditions (e.g., dependence of the chemical shifts on temperature, concentration, solvent polarity, and pH) are reported. Also solid-state (13)C- and (15)N-NMR experiments are described revealing the anisotropic values of corresponding chemical shifts. These data, in combination with a number of coupling constants, led to a detailed description of the electronic structure of oxidized and reduced flavins. The data also demonstrate that the structure of oxidized flavin can assume a configuration deviating from coplanarity, depending on substitutions in the isoalloxazine ring, while that of reduced flavin exhibits several configurations, from almost planar to quite bended. The complexes formed between oxidized flavin and metal ions or organic molecules revealed three coordination sites with metal ions (depending on the chemical nature of the ion), and specific interactions between the pyrimidine moiety of flavin and organic molecules, mimicking specific interactions between apoflavoproteins and their coenzymes. Most NMR studies on flavoproteins were performed using (13)C- and (15)N-substituted coenzymes, either specifically enriched in the pterin moiety of flavin or uniformly labeled flavins. The chemical shifts of free flavins are used as a guide in the interpretation of the chemical shifts observed in flavoproteins. Although the hydrogen-bonding pattern in oxidized and reduced flavoproteins varies considerably, no correlation is obvious between these patterns and the corresponding redox potentials. In all reduced flavoproteins the N(1)H group of the flavocoenzyme is deprotonated, an exception is thioredoxin reductase. Three-dimensional structures of only a few flavoproteins, mostly belonging to the family of flavodoxins, have been solved. Also the kinetics of unfolding and refolding of flavodoxins has been investigated by NMR techniques. In addition, (31)P-NMR data of all so far studied flavoproteins and some (19)F-NMR spectra are discussed.
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Affiliation(s)
- Franz Müller
- , Wylstrasse 13, CH-6052, Hergiswil, Switzerland,
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40
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Scrase TG, Page SM, Barker PD, Boss SR. Folates are potential ligands for ruthenium compounds in vivo. Dalton Trans 2014; 43:8158-61. [DOI: 10.1039/c4dt00081a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A labile ruthenium(ii) complex has been observed to chelate to folates under physiologically relevant conditions. The diastereomeric complexes formed would interfere with the one-carbon carrying role of folate in vivo. This highlights the importance of considering small molecules alongside macromolecules when determining the chemical origins of cytotoxicity of metallodrug candidates.
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Affiliation(s)
- Tom G. Scrase
- The University of Cambridge Chemical Laboratory
- Cambridge, UK
| | - Simon M. Page
- The University of Cambridge Chemical Laboratory
- Cambridge, UK
| | - Paul D. Barker
- The University of Cambridge Chemical Laboratory
- Cambridge, UK
| | - Sally R. Boss
- The University of Cambridge Chemical Laboratory
- Cambridge, UK
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41
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Baisya SS, Roy PS. (2-Amino-7-methyl-4-oxidopteridine-6-carboxylato-κ 3O4, N5, O6)(ethane-1,2-diamine-κ 2N, N′)(1 H-imidazole-κ N3)nickel(II) dihydrate. Acta Crystallogr Sect E Struct Rep Online 2013; 69:m193-4. [PMID: 23633994 PMCID: PMC3629476 DOI: 10.1107/s1600536813005898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2013] [Accepted: 02/28/2013] [Indexed: 11/17/2022]
Abstract
In the title complex, [Ni(C8H5N5O3)(C2H8N2)(C3N2H4)]·2H2O, a tridentate 2-amino-7-methyl-4-oxidopteridine-6-carboxylate (pterin) ligand, a bidentate ancillary ethane-1,2-diamine (en) ligand and a monodentate 1H-imidazole (im) ligand complete a distorted octahedral geometry around the NiII atom. The pterin ligand forms two chelate rings. Both the en and im ligands are arranged nearly orthogonally relative to the pterin ligand [dihedral angles between the mean planes of the en and pterin ligands and of the im and pterin ligands are 84.62 (9) and 85.14 (9)°, respectively]. N—H⋯N, N—H⋯O, O—H⋯N and O—H⋯O hydrogen bonds link the complex molecules and lattice water molecules into a three-dimensional network.
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42
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Inui Y, Shiro M, Kusukawa T, Fukuzumi S, Kojima T. A triangular prismatic hexanuclear iridium(III) complex bridged by flavin analogues showing reversible redox processes. Dalton Trans 2013; 42:2773-8. [PMID: 23235491 DOI: 10.1039/c2dt32535g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
[Ir(6)(μ-alloCl(2)(2-))(3)(Cp*)(6)(OH)(3)](PF(6))(3) (1) having 7,8-dichloroalloxazine dianion (alloCl(2)(2-)) as bridging ligands was synthesized and characterized by X-ray crystallography, spectroscopic and electrochemical measurements. The alloxazine ligands showed unprecedented coordination modes to link the six Ir(III) centres. The complex exhibited remarkable stability and reversible six-electron redox processes at the bridging alloxazine ligands in organic solvents. The first reversible reduction process occurred on each of three alloxazine ligands in 1 to produce a three-electron-reduced species, [Ir(III)(6)Cp*(6)(μ-alloCl(2)˙(3-))(3)(OH)(3)], and was observed as an apparent one-step reduction process at -0.65 V (vs. Fc(0/+)). The second reversible reduction process on each of the three alloxazine ligands in 1 was recorded at almost the same potential, -0.78 V (vs. Fc(0/+)), to afford the six-electron-reduced form, [Ir(III)(6)Cp*(6)(μ-alloCl(2)(4-))(3)(OH)(3)](3-). The radical anion of the alloxazine derivative was detected by EPR measurements at room temperature. After the six-electron reduction of 1 with cobaltocene, the backward oxidation processes of reduced forms with p-chloranil were traced by UV-Vis spectroscopy to confirm the recovery of the original spectrum of 1.
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Affiliation(s)
- Yuji Inui
- Department of Material and Life Science, Graduate School of Engineering, Osaka University, and ALCA (JST), 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
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43
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Machura B, Palion J, Mroziński J, Kalińska B, Kruszynski R. Synthesis, spectroscopic investigations, X-ray studies and magnetic properties of novel three-dimensional thiocyanato-bridged manganese(II)–mercury(II) coordination polymers. Polyhedron 2013. [DOI: 10.1016/j.poly.2012.10.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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44
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Shuster V, Gambarotta S, Nikiforov GB, Korobkov I, Budzelaar PHM. Radical Cleavage of Al–C Bonds Promoted by Phenazine: From Noninnocent Ligand to Radical Abstractor. Organometallics 2012. [DOI: 10.1021/om300889m] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Vladimir Shuster
- Department of Chemistry, University of Ottawa, Ottawa, Ontario, Canada
| | - Sandro Gambarotta
- Department of Chemistry, University of Ottawa, Ottawa, Ontario, Canada
| | | | - Ilia Korobkov
- Department of Chemistry, University of Ottawa, Ottawa, Ontario, Canada
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Ragone F, Ruiz GT, Piro OE, Echeverría GA, Cabrerizo FM, Petroselli G, Erra-Balsells R, Hiraoka K, García Einschlag FS, Wolcan E. Water-Soluble (Pterin)rhenium(I) Complex: Synthesis, Structural Characterization, and Two Reversible Protonation-Deprotonation Behavior in Aqueous Solutions. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200681] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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46
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Sathyadevi P, Krishnamoorthy P, Bhuvanesh NS, Kalaiselvi P, Vijaya Padma V, Dharmaraj N. Organometallic ruthenium(II) complexes: Synthesis, structure and influence of substitution at azomethine carbon towards DNA/BSA binding, radical scavenging and cytotoxicity. Eur J Med Chem 2012; 55:420-31. [DOI: 10.1016/j.ejmech.2012.08.001] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2012] [Revised: 07/31/2012] [Accepted: 08/01/2012] [Indexed: 11/25/2022]
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Mullice LA, Mottram HJ, Hallett AJ, Pope SJA. Gold(I) Complexes Incorporating Emissive Mercapto-Pteridine Ligands: Syntheses, X-ray Structure, Luminescence and Preliminary Cytotoxic Evaluation. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200147] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Wang Y, Zhu PH, Tian T, Tang J, Wang L, Hu XY. Synchronous fluorescence as a rapid method for the simultaneous determination of folic acid and riboflavin in nutritional beverages. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2011; 59:12629-12634. [PMID: 22077283 DOI: 10.1021/jf202536m] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A rapid synchronous spectrofluorimetric method was first developed for the simultaneous determination of folic acid and riboflavin in nutrimental beverages. Folic acid could be detected by using H(2)O(2) plus Cu(II) as oxidation system to produce pterine-6-carboxylic acid, which had strong fluorescence in aqueous solution, and riboflavin itself was obviously fluorescent. Various operational parameters were thoroughly discussed in terms of their effects on the fluorescence signals, including instrumental parameters, concentration of the oxidation system, and pH. Under optimum conditions, the calibration curves were linear in the ranges of 100-250 μg/L for folic acid and 1-250 μg/L for riboflavin, and the detection limits were 2.0 and 0.014 μg/L, respectively. In addition, this method was applied to the determination of folic acid and riboflavin in nutrimental beverages with satisfactory results.
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Affiliation(s)
- Yang Wang
- College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China.
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McKinnon SDJ, Patrick BO, Lever ABP, Hicks RG. Electronic Structure Investigations of Neutral and Charged Ruthenium Bis(β-diketonate) Complexes of Redox-Active Verdazyl Radicals. J Am Chem Soc 2011; 133:13587-603. [DOI: 10.1021/ja204575u] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Stephen D. J. McKinnon
- Department of Chemistry, University of Victoria, P.O. Box 3065 STN CSC, Victoria, BC. V8W 3V6, Canada
| | - Brian O. Patrick
- Crystallography Laboratory, Department of Chemistry, University of British Columbia, Vancouver, BC, V6T 1Z1, Canada
| | - A. B. P. Lever
- Department of Chemistry, York University, Toronto, Ontario, M3J 1P3, Canada
| | - Robin G. Hicks
- Department of Chemistry, University of Victoria, P.O. Box 3065 STN CSC, Victoria, BC. V8W 3V6, Canada
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Experimental and computational investigations of cadmium(II) complexes incorporating 2-benzoylpyridine. Polyhedron 2011. [DOI: 10.1016/j.poly.2011.06.007] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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