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Dos Santos HF, Paschoal DFS. S-Se oxidative addition to auranofin derivatives: a DFT study. Phys Chem Chem Phys 2024; 26:5517-5528. [PMID: 38284132 DOI: 10.1039/d3cp04913b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2024]
Abstract
Oxidative addition of the S-Se bond to Au(I) complexes is discussed for a series of 26 auranofin (AF) derivatives. AF and its analogues are Au(I) complexes with recognized anticancer activity that act by binding and inhibiting the thioredoxin reductase (TrxR) enzyme. Generally, the oxidative addition to Au(I) is a sluggish reaction under mild conditions (i.e., a high activation barrier - ΔH‡), which is also verified here for AF, ΔH‡ = 33.0 kcal mol-1. However, we predicted that subtle changes in the AF ligands can make the process feasible under standard conditions. For instance, the exchange of -PEt3 by -P(Et2)(OEt), which is a weaker electron σ-donor, reduced the activation barrier to 17.1 kcal mol-1. Furthermore, substitution of the -SAtg ligand by -Cl- leads to a ΔH‡ value of 22.5 kcal mol-1. Overall, the reaction is driven by the nucleophilic attack of the S-Se bond on the Au(I) center, attributed mainly to the charge transfer (4p)Se → (6p)Au, which characterizes the addition step. At the transition state (TS) point, the (5d)Au → σ*(S-Se) charge transfer becomes relevant, facilitating the S-Se bond breakage and the oxidation step. In addition to the electron transfers, the strain energy to deform the linear Au(I) geometry to the tetracoordinated Au(III) arrangement in the TS structure plays a primary role in explaining the trends in the activation barriers. Finally, the activation barrier (ΔH‡) and reaction energy (ΔH°) were correlated for most of the complexes studied, which suggests that the reaction passes through a late or product-like TS and, therefore, the steric and electronic factors affecting ΔH‡ also act on ΔH°. Overall, the results presented here might open up a new field of investigation for interactions between AF derivatives and TrxR, which contributes to a full understanding of the biological mechanism of action of these species.
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Affiliation(s)
- Hélio F Dos Santos
- NEQC: Núcleo de Estudos em Química Computacional, Departamento de Química - ICE, Universidade Federal de Juiz de Fora, Campus Universitário, 36.036-900, Juiz de Fora, MG, Brazil.
| | - Diego F S Paschoal
- NQTCM: Núcleo de Química Teórica e Computacional de Macaé, Polo Ajuda, Instituto Multidisciplinar de Química, Centro Multidisciplinar UFRJ-Macaé, Universidade Federal do Rio de Janeiro, 27.971-525, Macaé, RJ, Brazil
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2
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Almeida ER, Dos Santos HF. Nanoconfinement effect on the hydrolysis of cisplatin. Chem Phys Lett 2023. [DOI: 10.1016/j.cplett.2022.140247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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3
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The role of tridentate ligands on the redox stability of anticancer gold(III) complexes. J Inorg Biochem 2022; 236:111970. [PMID: 36049259 DOI: 10.1016/j.jinorgbio.2022.111970] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 08/12/2022] [Accepted: 08/13/2022] [Indexed: 12/15/2022]
Abstract
Gold(III) complexes are promising compounds for cancer chemotherapy, whose action depends on their redox stability. In this context, the choice of ligands is crucial to adjust their reactivity and biological response. The present study addressed the effect of the gold coordination sphere on the reduction potential (Eo) for ten gold(III) complexes containing five or six-membered rings tridentate ligands - [AuIII(trident)Cl]3+n (trident = N^N^N, C^N^N, C^C^N, C^N^C, and N^C^N). The calculated Eo covered a broad range of 2500 mV with the most stable complexes containing two AuC bonds (Eo = -1.85 V for [AuIII(C^C^N)Cl] - f). For complexes with one AuC bond, the N^C^N ligands stabilize the gold(III) complex more efficiently than N^N^C; however, the inclusion of the non-innocent ligand bipy (2,2'-bipyridine) in N^N portion provides an extra stabilization effect. Among the derivatives with one AuC bond, [AuIII(N^N^C)Cl]+ (N^N = bipy) (a) showed Eo = -1.20 V. For the complexes with N^N^N ligands, Eo was positive and almost constant (+0.60 V). Furthermore, the kinetics for ligand exchange reactions (Cl-/H2O, H2O/Cys and Cl-/Cys) were monitored for the most stable compounds and the energy profiles compared to the reduction pathways.
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4
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de Souza Pereira C, Costa Quadros H, Magalhaes Moreira DR, Castro W, Santos De Deus Da Silva RI, Botelho Pereira Soares M, Fontinha D, Prudêncio M, Schmitz V, Dos Santos HF, Gendrot M, Fonta I, Mosnier J, Pradines B, Navarro M. A Novel Hybrid of Chloroquine and Primaquine Linked by Gold(I): Multitarget and Multiphase Antiplasmodial Agent. ChemMedChem 2020; 16:662-678. [PMID: 33231370 DOI: 10.1002/cmdc.202000653] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 11/02/2020] [Indexed: 12/23/2022]
Abstract
Plasmodium parasites kill 435 000 people around the world every year due to unavailable vaccines, a limited arsenal of antimalarial drugs, delayed treatment, and the reduced clinical effectiveness of current practices caused by drug resistance. Therefore, there is an urgent need to discover and develop new antiplasmodial candidates. In this work, we present a novel strategy to develop a multitarget metallic hybrid antimalarial agent with possible dual efficacy in both sexual and asexual erythrocytic stages. A hybrid of antimalarial drugs (chloroquine and primaquine) linked by gold(I) was synthesized and characterized by spectroscopic and analytical techniques. The CQPQ-gold(I) hybrid molecule affects essential parasite targets, it inhibits β-hematin formation and interacts moderately with the DNA minor groove. Its interaction with PfTrxR was also examined in computational modeling studies. The CQPQ-gold(I) hybrid displayed an excellent in vitro antimalarial activity against the blood-stage of Plasmodium falciparum and liver-stage of Plasmodium berghei and efficacy in vivo against P. berghei, thereby demonstrating its multiple-stage antiplasmodial activity. This metallic hybrid is a promising chemotherapeutic agent that could act in the treatment, prevention, and transmission of malaria.
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Affiliation(s)
- Caroline de Souza Pereira
- Departamento de Química, Universidade Federal de Juiz de Fora, Rua José Lourenço Kelmer, s/n - Campus Universitário, Bairro Martelos, CEP 36036-900, Juiz de Fora, Minas Gerais, Brasil
| | - Helenita Costa Quadros
- Instituto Gonçalo Moniz, Fundação Oswaldo Cruz, Av. Waldemar Falcão, 121, Candeal, Salvador, Bahia, Brasil
| | | | - William Castro
- Centro de Química, Instituto Venezolano de Investigaciones Científicas (IVIC), Centro de Química, Carretera Panamericana, Km 11, Altos de Pipe, San Antonio de los Altos Miranda, 1020-A, Caracas, Venezuela
| | | | | | - Diana Fontinha
- Instituto de Medicina Molecular João Lobo Antunes, Faculdade de Medicina, Universidade de Lisboa <, Lisboa, Portugal
| | - Miguel Prudêncio
- Instituto de Medicina Molecular João Lobo Antunes, Faculdade de Medicina, Universidade de Lisboa <, Lisboa, Portugal
| | - Vinicius Schmitz
- Departamento de Química, Universidade Federal de Juiz de Fora, Rua José Lourenço Kelmer, s/n - Campus Universitário, Bairro Martelos, CEP 36036-900, Juiz de Fora, Minas Gerais, Brasil
| | - Hélio F Dos Santos
- Departamento de Química, Universidade Federal de Juiz de Fora, Rua José Lourenço Kelmer, s/n - Campus Universitário, Bairro Martelos, CEP 36036-900, Juiz de Fora, Minas Gerais, Brasil
| | - Mathieu Gendrot
- Unité Parasitologie et entomologie, Institut de recherche biomédicale des armées, 19-21 Bd Jean Moulin, 13005, Marseille, France.,Aix-Marseille Univ, IRD, SSA, AP-HM, VITROME, 19-21 Bd Jean Moulin, 13005, Marseille, France.,IHU Méditerranée Infection, 19-21 Bd Jean Moulin, 13005, Marseille, France
| | - Isabelle Fonta
- Unité Parasitologie et entomologie, Institut de recherche biomédicale des armées, 19-21 Bd Jean Moulin, 13005, Marseille, France.,Aix-Marseille Univ, IRD, SSA, AP-HM, VITROME, 19-21 Bd Jean Moulin, 13005, Marseille, France.,IHU Méditerranée Infection, 19-21 Bd Jean Moulin, 13005, Marseille, France.,Centre National de Référence du Paludisme, 19-21 Bd Jean Moulin, 13005, Marseille, France
| | - Joel Mosnier
- Unité Parasitologie et entomologie, Institut de recherche biomédicale des armées, 19-21 Bd Jean Moulin, 13005, Marseille, France.,Aix-Marseille Univ, IRD, SSA, AP-HM, VITROME, 19-21 Bd Jean Moulin, 13005, Marseille, France.,IHU Méditerranée Infection, 19-21 Bd Jean Moulin, 13005, Marseille, France.,Centre National de Référence du Paludisme, 19-21 Bd Jean Moulin, 13005, Marseille, France
| | - Bruno Pradines
- Unité Parasitologie et entomologie, Institut de recherche biomédicale des armées, 19-21 Bd Jean Moulin, 13005, Marseille, France.,Aix-Marseille Univ, IRD, SSA, AP-HM, VITROME, 19-21 Bd Jean Moulin, 13005, Marseille, France.,IHU Méditerranée Infection, 19-21 Bd Jean Moulin, 13005, Marseille, France.,Centre National de Référence du Paludisme, 19-21 Bd Jean Moulin, 13005, Marseille, France
| | - Maribel Navarro
- Departamento de Química, Universidade Federal de Juiz de Fora, Rua José Lourenço Kelmer, s/n - Campus Universitário, Bairro Martelos, CEP 36036-900, Juiz de Fora, Minas Gerais, Brasil
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5
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Reactivity of the [Au(C^N^C)Cl] complex in the presence of H2O and N-, S- and Se-containing nucleophiles: a DFT study. J Biol Inorg Chem 2018; 23:1283-1293. [DOI: 10.1007/s00775-018-1614-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2018] [Accepted: 09/05/2018] [Indexed: 11/26/2022]
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6
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Formation of chelate structure between His-Met dipeptide and diaqua-cisplatin complex; DFT/PCM computational study. J Biol Inorg Chem 2018; 23:363-376. [DOI: 10.1007/s00775-018-1536-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Accepted: 01/23/2018] [Indexed: 02/01/2023]
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7
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Tavares TT, Azevedo GC, Garcia A, Carpanez AG, Lewer PM, Paschoal D, Müller BL, Dos Santos HF, Matos RC, Silva H, Grazul RM, Fontes APS. Gold(I) complexes with aryl-thiosemicarbazones: Molecular modeling, synthesis, cytotoxicity and TrxR inhibition. Polyhedron 2017. [DOI: 10.1016/j.poly.2017.05.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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8
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Dos Santos HF, Vieira MA, Sánchez Delgado GY, Paschoal D. Ligand Exchange Reaction of Au(I) R-N-Heterocyclic Carbene Complexes with Cysteine. J Phys Chem A 2016; 120:2250-9. [DOI: 10.1021/acs.jpca.6b01052] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- H. F. Dos Santos
- Department
of Chemistry, NEQC: Núcleo de Estudos em Química Computacional, Federal University of Juiz de Fora, Campus Universitário Martelos, 36.036-900, Juiz de Fora, Brazil
| | - M. A. Vieira
- Department
of Chemistry, NEQC: Núcleo de Estudos em Química Computacional, Federal University of Juiz de Fora, Campus Universitário Martelos, 36.036-900, Juiz de Fora, Brazil
| | - G. Y. Sánchez Delgado
- Department
of Chemistry, NEQC: Núcleo de Estudos em Química Computacional, Federal University of Juiz de Fora, Campus Universitário Martelos, 36.036-900, Juiz de Fora, Brazil
| | - D. Paschoal
- Department
of Chemistry, NEQC: Núcleo de Estudos em Química Computacional, Federal University of Juiz de Fora, Campus Universitário Martelos, 36.036-900, Juiz de Fora, Brazil
- Federal University of Rio de Janeiro, Campus Macaé, 27.930-560, Macaé, Brazil
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9
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Garcia A, Machado RC, Grazul RM, Lopes MTP, Corrêa CC, Dos Santos HF, de Almeida MV, Silva H. Novel antitumor adamantane-azole gold(I) complexes as potential inhibitors of thioredoxin reductase. J Biol Inorg Chem 2016; 21:275-92. [PMID: 26841791 DOI: 10.1007/s00775-016-1338-y] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Accepted: 01/09/2016] [Indexed: 11/28/2022]
Abstract
Gold complexes that could act as antitumor agents have attracted great attention. Heterocyclic compounds and their metal complexes display a broad spectrum of pharmacological properties. The present study reports the preparation and characterization of four novel gold(I) complexes containing tertiary phosphine and new ligands 5-adamantyl-1,3-thiazolidine-2-thione, 3-methyladamantane-1,3,4-oxadiazole-2-thione. Spectroscopic data suggest that gold is coordinated to the exocyclic sulfur atom in all cases, as confirmed by X-ray crystallographic data obtained for complex (1) and supported by quantum-mechanical calculations. The cytotoxicity of the compounds has been evaluated in comparison to cisplatin and auranofin in three different tumor cell lines, colon cancer (CT26WT), metastatic skin melanoma (B16F10), mammary adenocarcinoma (4T1) and kidney normal cell (BHK-21). The gold complexes were more active than their respective free ligands and able to inhibit the thioredoxin reductase (TrxR) enzyme, even in the presence of albumin. Molecular modeling studies were carried out to understand the interaction between the compounds and the TrxR enzyme, considered as a potential target for new compounds in cancer treatment. The docking results show that the adamantane ring is essential to stabilize the ligand-enzyme complex prior the formation of covalent bond with gold center. The structure of the new gold compounds was established on the basis of spectroscopic data, DFT calculations and X-ray diffraction. TrxR inhibition was evaluated and the results correlated with the assays in tumor cells, suggesting the TrxR as possible target for these compounds.
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Affiliation(s)
- Adriana Garcia
- Departamento de Química, ICE, Universidade Federal de Juiz de Fora, Juiz De Fora, MG, 36036-900, Brazil
| | - Rafael Carvalhaes Machado
- Departamento de Química, ICE, Universidade Federal de Juiz de Fora, Juiz De Fora, MG, 36036-900, Brazil
| | - Richard Michael Grazul
- Departamento de Química, ICE, Universidade Federal de Juiz de Fora, Juiz De Fora, MG, 36036-900, Brazil
| | - Miriam Teresa Paz Lopes
- Departamento de Farmacologia, ICB, Universidade Federal de Minas Gerais, Belo Horizonte, MG, 31270-901, Brazil
| | - Charlane Cimini Corrêa
- Departamento de Química, ICE, Universidade Federal de Juiz de Fora, Juiz De Fora, MG, 36036-900, Brazil
| | - Hélio F Dos Santos
- Departamento de Química, ICE, Universidade Federal de Juiz de Fora, Juiz De Fora, MG, 36036-900, Brazil
| | - Mauro Vieira de Almeida
- Departamento de Química, ICE, Universidade Federal de Juiz de Fora, Juiz De Fora, MG, 36036-900, Brazil
| | - Heveline Silva
- Departamento de Química, ICE, Universidade Federal de Juiz de Fora, Juiz De Fora, MG, 36036-900, Brazil.
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11
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Langseth E, Nova A, Tråseth EA, Rise F, Øien S, Heyn RH, Tilset M. A Gold Exchange: A Mechanistic Study of a Reversible, Formal Ethylene Insertion into a Gold(III)–Oxygen Bond. J Am Chem Soc 2014; 136:10104-15. [DOI: 10.1021/ja504554u] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
| | | | | | | | | | - Richard H. Heyn
- SINTEF
Materials and Chemistry, P.O. Box 124, Blindern, N-0314 Oslo, Norway
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12
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Mota VZ, de Carvalho GSG, da Silva AD, Costa LAS, de Almeida Machado P, Coimbra ES, Ferreira CV, Shishido SM, Cuin A. Gold complexes with benzimidazole derivatives: synthesis, characterization and biological studies. Biometals 2014; 27:183-94. [DOI: 10.1007/s10534-014-9703-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Accepted: 12/31/2013] [Indexed: 10/25/2022]
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13
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Spell SR, Farrell NP. Synthesis and Properties of the First [Au(dien)(N-heterocycle)]3+ Compounds. Inorg Chem 2013; 53:30-2. [DOI: 10.1021/ic402772j] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Sarah R. Spell
- Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284-2006, United States
| | - Nicholas P. Farrell
- Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284-2006, United States
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Martins AP, Ciancetta A, de Almeida A, Marrone A, Re N, Soveral G, Casini A. Aquaporin inhibition by gold(III) compounds: new insights. ChemMedChem 2013; 8:1086-92. [PMID: 23653381 DOI: 10.1002/cmdc.201300107] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2013] [Indexed: 01/15/2023]
Abstract
Aquaporins (AQPs) are membrane water/glycerol channels with essential roles in biological systems, as well as being promising targets for therapy and imaging. Using a stopped-flow method, a series of gold(III), platinum(II) and copper(II) complexes bearing nitrogen donor ligands, such as 1,10-phenatroline, 2,2'-bipyridine, 4,4'-dimethyl-2,2'-bipyridine, 4,4'-diamino-2,2'-bipyridine and 2,2';6',2"-terpyridine, were evaluated in human red blood cells expressing AQP1 and AQP3, responsible for water and glycerol movement, respectively. The results showed that the gold(III) complexes selectively modulate AQP3 over AQP1. Molecular modeling and density functional theory (DFT) calculations were subsequently performed to rationalize the observations and to investigate the possible molecular mechanism through which these gold compounds act on their putative target (AQP3). In the absence of any crystallographic data, a previously reported homology model was used for this purpose. Combined, the findings of this study show that potent and selective modulation of these solute channels is possible, however further investigation is required into the selectivity of this class of agents against all AQP isoforms and their potential therapeutic uses.
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Affiliation(s)
- Ana Paula Martins
- Research Institute for Medicines & Pharmaceutical Sciences (iMed.UL), Av. Prof. Gama Pinto, 1649-003 Lisbon, Portugal
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