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Binuclear Cu(II), Ni(II) and Zn(II) Complexes of Hydrazone Schiff Bases: Synthesis, Spectroscopy, DFT Calculations, and SOD Mimetic Activity. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2023.134926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Zhang L, Feng X, Gu Y, Yang T, Li X, Yu H, You Z. SYNTHESES, CRYSTAL STRUCTURES, AND ANTIMICROBIAL ACTIVITIES OF ZINC COMPLEXES DERIVED FROM 2-AMINO-N′- (PYRIDIN-2-YLMETHYLENE)BENZOHYDRAZIDE. J STRUCT CHEM+ 2022. [DOI: 10.1134/s0022476622080170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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3
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Yarullin DN, Zavalishin MN, Sharnin VA, Gamov GA. Equilibrium in a Bovine Serum Albumin–Pyridoxal-5-phosphate 4-Hydroxybenzoyl Hydrazone–La3+ Ion System. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2022. [DOI: 10.1134/s0036024422060310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Moustafa A, Perbandt M, Liebau E, Betzel C, Falke S. Crystal structure of an extracellular superoxide dismutase from Onchocerca volvulus and implications for parasite-specific drug development. Acta Crystallogr F Struct Biol Commun 2022; 78:232-240. [PMID: 35647680 PMCID: PMC9158661 DOI: 10.1107/s2053230x22005350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Accepted: 05/19/2022] [Indexed: 11/17/2022] Open
Abstract
Superoxide dismutases (SODs) are metalloproteins that are responsible for the dismutation of superoxide anion radicals. SODs are consequently protective against oxidative damage to cellular components. Among other protective mechanisms, the filarial parasite Onchocerca volvulus has a well developed defense system to scavenge toxic free radicals using SODs during migration and sojourning of the microfilariae and adult worms in the human body. O. volvulus is responsible for the neglected disease onchocerciasis or `river blindness'. In the present study, an extracellular Cu/Zn-SOD from O. volvulus (OvEC-SOD) was cloned, purified and crystallized to obtain structural insight into an attractive drug target with the potential to combat onchocerciasis. The recombinant OvEC-SOD forms a dimer and the protein structure was solved and refined to 1.55 Å resolution by X-ray crystallography. Interestingly, a sulfate ion supports the coordination of the conserved copper ion. The overall protein shape was verified by small-angle X-ray scattering. The enzyme shows a different surface charge distribution and different termini when compared with the homologous human SOD. A distinct hydrophobic cleft to which both protomers of the dimer contribute was utilized for a docking approach with compounds that have previously been identified as SOD inhibitors to highlight the potential for individual structure-based drug development.
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Affiliation(s)
- Amr Moustafa
- Laboratory for Structural Biology of Infection and Inflammation, University of Hamburg, c/o DESY, Building 22a, Notkestrasse 85, 22607 Hamburg, Germany
- Biochemistry Department, Faculty of Veterinary Medicine, Zagazig University, Zagazig 44519, Egypt
| | - Markus Perbandt
- Laboratory for Structural Biology of Infection and Inflammation, University of Hamburg, c/o DESY, Building 22a, Notkestrasse 85, 22607 Hamburg, Germany
| | - Eva Liebau
- Institut für Zoophysiologie, Westfälische Wilhelms-Universität Münster, Schlossplatz 8, 48143 Münster, Germany
| | - Christian Betzel
- Laboratory for Structural Biology of Infection and Inflammation, University of Hamburg, c/o DESY, Building 22a, Notkestrasse 85, 22607 Hamburg, Germany
| | - Sven Falke
- Laboratory for Structural Biology of Infection and Inflammation, University of Hamburg, c/o DESY, Building 22a, Notkestrasse 85, 22607 Hamburg, Germany
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Rozanov ES, Grazhdan KV, Kiselev AN, Gamov GA. Protolytic Equilibrium Constants in Aqueous Solutions of Pyridoxal-5'-Phosphate Hydrazone and L-Tyrosine. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2022. [DOI: 10.1134/s0036024422040252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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6
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Synthesis and biological evaluation of six L-tryptophan Schiff base copper(II) complexes as promising anticancer agents in vitro. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.132578] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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7
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Siqueira JD, de Pellegrin SF, Fioravanço LP, André Fontana L, Iglesias BA, Chaves OA, Back DF. Self-association synthesis with ortho-vanillin to promote mono- and heptanuclear complexes and their evaluation as antioxidant agents. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.132480] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Gur'eva YA, Zalevskaya OA, Shevchenko OG, Slepukhin PA, Makarov VA, Kuchin AV. Copper(ii) complexes with terpene derivatives of ethylenediamine: synthesis, and antibacterial, antifungal and antioxidant activity. RSC Adv 2022; 12:8841-8851. [PMID: 35424859 PMCID: PMC8985105 DOI: 10.1039/d2ra00223j] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Accepted: 03/12/2022] [Indexed: 11/21/2022] Open
Abstract
The synthesis of new chiral copper(ii) complexes with terpene derivatives of ethylenediamine and the results of studying their antibacterial, antifungal and antioxidant activity in vitro are discussed. All studied copper complexes (1-4) showed significantly higher antifungal activity against the strains of C. albicans, S. salmonicolor and P. notatum compared to the activity of the clinical antifungal drug amphotericin. High antibacterial activity of copper complexes with terpene derivatives of ethylenediamine was revealed against the S. aureus (MRSA) strain, which is resistant to the reference antibiotic ciprofloxacin. Using various test systems, a comparative assessment of the antioxidant activity (AOA) of the synthesized copper complexes and the ligands was carried out. The salen-type complex 4, which has the highest AOA in the model of initiated oxidation of a substrate containing animal lipids, was superior to other copper complexes in the ability to protect erythrocytes under conditions of H2O2-induced hemolysis.
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Affiliation(s)
- Yana A Gur'eva
- Institute of Chemistry, Komi Scientific Center, Ural Branch of the Russian Academy of Sciences 48, Pervomayskaya St. Syktyvkar 167000 Komi Republic Russian Federation
| | - Olga A Zalevskaya
- Institute of Chemistry, Komi Scientific Center, Ural Branch of the Russian Academy of Sciences 48, Pervomayskaya St. Syktyvkar 167000 Komi Republic Russian Federation
| | - Oksana G Shevchenko
- Institute of Biology, Komi Scientific Center, Ural Branch of the Russian Academy of Sciences 28, Kommunisticheskaya St. Syktyvkar 167982 Komi Republic Russian Federation
| | - Pavel A Slepukhin
- I.Ya. Postovskii Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences 22/20, S. Kovalevskoy St. Ekaterinburg 620108 Russian Federation
| | - Vadim A Makarov
- Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences 33-2, Leninsky Prospekt Moscow 119071 Russian Federation
| | - Aleksandr V Kuchin
- Institute of Chemistry, Komi Scientific Center, Ural Branch of the Russian Academy of Sciences 48, Pervomayskaya St. Syktyvkar 167000 Komi Republic Russian Federation
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Copper(II) complexes derived from furfurylamine and thiophenyl ligands: cytotoxicity, antioxidant properties, and molecular docking assessments. Polyhedron 2022. [DOI: 10.1016/j.poly.2021.115608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Wambugu K, Nyamato GS, Ogunah J, Ojwach SO. Phenoxy-imino ligands: coordination chemistry and binding properties with copper(II) cations. J COORD CHEM 2021. [DOI: 10.1080/00958972.2021.2015581] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Kelvin Wambugu
- Department of Physical Sciences, University of Embu, Embu, Kenya
| | | | - Joanne Ogunah
- Department of Physical Sciences, University of Embu, Embu, Kenya
| | - Stephen O. Ojwach
- School of Chemistry and Physics, University of KwaZulu-Natal, Scottsville, South Africa
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Veiga N, Alvarez N, Castellano EE, Ellena J, Facchin G, Torre MH. Comparative Study of Antioxidant and Pro-Oxidant Properties of Homoleptic and Heteroleptic Copper Complexes with Amino Acids, Dipeptides and 1,10-Phenanthroline: The Quest for Antitumor Compounds. Molecules 2021; 26:6520. [PMID: 34770929 PMCID: PMC8587672 DOI: 10.3390/molecules26216520] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 10/22/2021] [Accepted: 10/25/2021] [Indexed: 11/16/2022] Open
Abstract
In a search for new antitumoral agents, a series of homoleptic copper(II) complexes with amino acids and dipeptides, as well as heteroleptic complexes containing both dipeptides and 1,10-phenanthroline, were studied. Furthermore, a single-crystal structure containing alanyl-leucinato ([Cu3(AlaLeu)3(H2O)3(CO3)]·PF6·H2O), which is the first homotrinuclear carbonato-bridged copper(II) complex with a dipeptide moiety, is presented. To assess possible antitumor action mechanisms, we focused on the comparative analysis of pro- and antioxidant behaviors. Pro-oxidant activity, in which the reactive oxygen species (ROS) formed by the reaction of the complexes with H2O2 produce oxidative damage to 2-deoxy-d-ribose, was evaluated using the TBARS method. Additionally, the antioxidant action was quantified through the superoxide dismutase (SOD)-like activity, using a protocol based on the inhibitory effect of SOD on the reduction of nitrobluetetrazolium (NBT) by the superoxide anion generated by the xanthine/xanthine oxidase system. Our findings show that Cu-amino acid complexes are strong ROS producers and moderate SOD mimics. Conversely, Cu-dipeptide-phen complexes are good SOD mimics but poor ROS producers. The activity of Cu-dipeptide complexes was strongly dependent on the dipeptide. A DFT computational analysis revealed that complexes with high SOD-like activity tend to display a large dipole moment and condensed-to-copper charge, softness and LUMO contribution. Moreover, good ROS producers have higher global hardness and copper electrophilicity, lower copper softness and flexible and freely accessible coordination polyhedra.
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Affiliation(s)
- Nicolás Veiga
- Química Inorgánica, DEC, Facultad de Química, Universidad de la República, Av. Gral. Flores 2124, Montevideo C.P. 11800, Uruguay; (N.V.); (N.A.)
| | - Natalia Alvarez
- Química Inorgánica, DEC, Facultad de Química, Universidad de la República, Av. Gral. Flores 2124, Montevideo C.P. 11800, Uruguay; (N.V.); (N.A.)
| | - Eduardo E. Castellano
- Laboratório Multiusuário de Cristalografia Estrutural, Instituto de Física de São Carlos, Universidade de São Paulo, São Carlos CEP 13566-590, Brazil; (E.E.C.); (J.E.)
| | - Javier Ellena
- Laboratório Multiusuário de Cristalografia Estrutural, Instituto de Física de São Carlos, Universidade de São Paulo, São Carlos CEP 13566-590, Brazil; (E.E.C.); (J.E.)
| | - Gianella Facchin
- Química Inorgánica, DEC, Facultad de Química, Universidad de la República, Av. Gral. Flores 2124, Montevideo C.P. 11800, Uruguay; (N.V.); (N.A.)
| | - María H. Torre
- Química Inorgánica, DEC, Facultad de Química, Universidad de la República, Av. Gral. Flores 2124, Montevideo C.P. 11800, Uruguay; (N.V.); (N.A.)
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Copper (II) complexes derived from pyridoxal: Structural correlations, cytotoxic activities, and molecular docking. Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2021.120530] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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da Silva TU, Pougy KDC, da Silva ET, Lima CHDS, Machado SDP. Electronic investigation of the effect of substituents on the SOD mimic activity of copper (II) complexes with 8-hydroxyquinoline-derived ligands. J Inorg Biochem 2021; 217:111359. [PMID: 33578252 DOI: 10.1016/j.jinorgbio.2021.111359] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 01/16/2021] [Accepted: 01/17/2021] [Indexed: 02/04/2023]
Abstract
Density functional theory (DFT) calculations were used to study the superoxide dismutase (SOD) mimic activity of two Cu2+ complexes with ligands derived from 8-hydroxyquinoline (8-HQ). Electron-donating and -withdrawing substituent groups were inserted into the structures to verify changes in the reactivity. The theoretical parameters obtained were compared and validated with the experimental data available. The results showed that the reduction process occurs with greater participation of the 8-HQ ligand and the oxidation step occurs with participation of the copper atom in the complexes, where the electron received during the reduction step is used to reduce the Cu2+ to Cu+. The calculated electronic affinity showed good correlation with the experimental mimetic activity, and the analysis of this property, of total charge and of molecular orbitals indicated an increase in the mimetic activity with the insertion of electron-withdrawing substituent groups in the structures.
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Affiliation(s)
- Talis Uelisson da Silva
- Instituto de Química, Universidade Federal do Rio de Janeiro, 21945-970 Rio de Janeiro, RJ, Brazil.
| | - Karina de Carvalho Pougy
- Instituto de Química, Universidade Federal do Rio de Janeiro, 21945-970 Rio de Janeiro, RJ, Brazil
| | - Everton Tomaz da Silva
- Instituto de Química, Universidade Federal do Rio de Janeiro, 21945-970 Rio de Janeiro, RJ, Brazil; Instituto Federal do Rio de Janeiro, 25050-100 Caxias, RJ, Brazil
| | | | - Sérgio de Paula Machado
- Instituto de Química, Universidade Federal do Rio de Janeiro, 21945-970 Rio de Janeiro, RJ, Brazil
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Dos Santos TM, Martins CC, Bueno DT, Nunes IJ, Busatto FF, Cargnelutti R, Luchese C, de Lazaro Casagrande O, Saffi J, Wilhelm EA, Pinheiro AC. Synthesis, molecular structure and antioxidant activity of bis [L(μ 2-chloro)copper(II)] supported by phenoxy/naphthoxy-imine ligands. J Inorg Biochem 2020; 210:111130. [PMID: 32563104 DOI: 10.1016/j.jinorgbio.2020.111130] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 05/31/2020] [Accepted: 06/06/2020] [Indexed: 02/07/2023]
Abstract
A new series of Cu(II) complexes [bis[{(μ2-chloro)-2-MeO-Ph-CH2-(N=CH)-2,4-tert-butyl-2-OC6H2)}Cu(II)] (Cu1); bis[{(μ2-chloro)-2-MeS-Ph-CH2-(N=CH)-2,4-tert-butyl-2-(OC6H2)}Cu(II)] (Cu2); bis[{(μ2-chloro)-2-MeO-Ph-CH2-(N=CH)-2-(OC10H6)} Cu(II)] (Cu3); bis[{(μ2-chloro)-2-MeS-Ph-CH2-(N=CH)-2-(OC10H6)}Cu(II)] complex (Cu4); bis[{2-MeS-Ph-CH2-(N=CH)-2,4-tert-butyl-2-(OC6H2)}Cu(II)] (Cu5)] have been synthesized and characterized by elemental analysis, IR, UV-Visible and by X-ray crystallography for Cu1, Cu4 and Cu5. In the solid state, Cu1 features of a chloro-bridged dimer complex with κ2 coordination of the monoanionic phenoxy-imine ligand onto the copper center. On the other hand, the molecular structure of Cu4 reveals the naphthoxy-imine ligand with pendant S-group coordinated to the copper atom in tridentate meridional fashion. Treatment of [Cu(OAc)2·H2O] with two equiv. of [2-MeS-Ph-CH2-(N=CH)-2,4-tert-butyl-2-(HOC6H2)] led to a monomeric complex Cu5, with the ONS-donor Schiff base acting as a bidentate ligand. The redox behavior was explored by cyclic voltammetry. The reduction/oxidation potential of Cu(II) complexes depends on the structure and conformation of the central atom in the coordination compounds. Antioxidant activities of the complexes, Cu1 - Cu5, were determined by in vitro assays such as 1,1-diphenyl-2-picryl-hydrazyl free radicals (DPPH) and 2,2'-azino-bis(3-ethylbenzthiazoline-6-sulfonic acid) radicals (ABTS+). The dinuclear compounds Cu1-Cu4, from the concentration of 5 μM, presented a good activity in scavenging DPPH radical. In addition, most of the Cu(II) complexes showed ABTS.+ radical-scavenging activity. The monomeric complex Cu5 at all concentrations tested showed antioxidant inability. The cytotoxicity of the Cu1 and Cu3 was determined in V79 cell line by reduction of 3(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-tetrazolium bromide (MTT) assay.
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Affiliation(s)
- Tamara Machado Dos Santos
- Programa de Pós-Graduação em Química, Grupo de Catálise e Estudos Teóricos, CCQFA - Universidade Federal de Pelotas, UFPel - CEP, 96160-000 Pelotas, RS, Brazil
| | - Carolina Cristovão Martins
- Programa de Pós-Graduação em Bioquímica e Bioprospecção, Laboratório de Pesquisa em Farmacologia Bioquímica, CCQFA - Universidade Federal de Pelotas, UFPel - CEP, 96010-900 Pelotas, RS, Brazil
| | - Danielle Tapia Bueno
- Programa de Pós-Graduação em Química, Grupo de Catálise e Estudos Teóricos, CCQFA - Universidade Federal de Pelotas, UFPel - CEP, 96160-000 Pelotas, RS, Brazil
| | - Ianka Jacondino Nunes
- Programa de Pós-Graduação em Química, Grupo de Catálise e Estudos Teóricos, CCQFA - Universidade Federal de Pelotas, UFPel - CEP, 96160-000 Pelotas, RS, Brazil
| | - Franciele Faccio Busatto
- Laboratório de Genética Toxicológica, Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre, RS, Brazil
| | - Roberta Cargnelutti
- Departamento de Química, Universidade Federal de Santa Maria, Av. Roraima, 1000, Santa Maria, RS 97105-900, Brazil
| | - Cristiane Luchese
- Programa de Pós-Graduação em Bioquímica e Bioprospecção, Laboratório de Pesquisa em Farmacologia Bioquímica, CCQFA - Universidade Federal de Pelotas, UFPel - CEP, 96010-900 Pelotas, RS, Brazil
| | - Osvaldo de Lazaro Casagrande
- Laboratório de Catálise Molecular, Instituto de Química, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves, 9500, Porto Alegre, RS 90501-970, Brazil
| | - Jenifer Saffi
- Laboratório de Genética Toxicológica, Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre, RS, Brazil
| | - Ethel Antunes Wilhelm
- Programa de Pós-Graduação em Bioquímica e Bioprospecção, Laboratório de Pesquisa em Farmacologia Bioquímica, CCQFA - Universidade Federal de Pelotas, UFPel - CEP, 96010-900 Pelotas, RS, Brazil
| | - Adriana Castro Pinheiro
- Programa de Pós-Graduação em Química, Grupo de Catálise e Estudos Teóricos, CCQFA - Universidade Federal de Pelotas, UFPel - CEP, 96160-000 Pelotas, RS, Brazil.
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