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Martins D, Lamosa R, da Silva TU, Ligiero CBP, de Paula Machado S, Cukierman DS, Rey NA. Effects of the aldehyde-derived ring substituent on the properties of two new bioinspired trimethoxybenzoylhydrazones: methyl vs nitro groups. Beilstein J Org Chem 2023; 19:1713-1727. [PMID: 38025090 PMCID: PMC10644011 DOI: 10.3762/bjoc.19.125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Accepted: 11/01/2023] [Indexed: 12/01/2023] Open
Abstract
N-Acylhydrazones are a versatile class of organic compounds with a diversity of potential applications. In this study, two new structure-related 3,4,5-trimethoxybenzoyl-containing N-acylhydrazones were synthesized and fully characterized, both in solution and in the solid state. The compounds differ with respect to the carbonyl precursors, i.e., 3-substituted salicylaldehydes with either a methyl or a nitro group. Single crystals of both compounds were isolated from the respective mother liquors and, in both cases, XRD confirmed the obtention of the (E)-isomer, in an anti-conformation. Computational calculations (gas and water phases) were performed in order to confirm some of the structural and vibrational aspects of the compounds. An important intramolecular H bond involving the phenolic hydroxy group and the azomethine nitrogen was identified in the solid state and seems to be maintained in solution. Moreover, the presence of the electron-withdrawing nitro substituent makes this interaction stronger. However, the contact should probably not subsist for the nitro compound under physiological conditions since the presence of this substituent significantly affects the pKa of the phenol: an apparent value of 5.68 ± 0.02 was obtained. This also impacts the basicity of the azomethine nitrogen and, as a consequence, increases the hydrazone's susceptibility to hydrolysis. Nevertheless, both compounds are stable at physiological-like conditions, especially the methyl-derived one, which qualifies them for further toxicological and activity studies, such as those involving trivalent metal ions sequestering in the context of neurodegenerative diseases.
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Affiliation(s)
- Dayanne Martins
- Departmento de Química, Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), Rio de Janeiro, 22451-900, Brazil
| | - Roberta Lamosa
- Departmento de Química, Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), Rio de Janeiro, 22451-900, Brazil
| | - Talis Uelisson da Silva
- Instituto de Química, Universidade Federal Rural do Rio de Janeiro (UFRRJ), Seropédica 23890-000, Brazil
| | - Carolina B P Ligiero
- Departamento de Química Inorgânica, Universidade Federal Fluminense (UFF), Niterói, 24020-141, Brazil
| | - Sérgio de Paula Machado
- Instituto de Química, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro 21945-970, Brazil
| | - Daphne S Cukierman
- Departmento de Química, Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), Rio de Janeiro, 22451-900, Brazil
- Departamento de Química Geral e Inorgânica, Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro, 20950-000, Brazil
| | - Nicolás A Rey
- Departmento de Química, Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), Rio de Janeiro, 22451-900, Brazil
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Dos Santos VF, Carneiro GRA, Braz BF, Santelli RE, de Paula Machado S, Gualberto Pereira HM. Coordination chemistry applied to anti-doping analysis: Cobalt quantification as its diethyldithiocarbamate complex by liquid chromatography coupled to high resolution tandem mass spectrometry. Drug Test Anal 2023; 15:1392-1402. [PMID: 37641464 DOI: 10.1002/dta.3571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 08/14/2023] [Accepted: 08/15/2023] [Indexed: 08/31/2023]
Abstract
Cobalt was included on the World Anti-Doping Agency Prohibited List in 2015 due to its effect on stimulus of erythropoiesis via stabilization of hypoxia-inducible factor. Although it has proven benefits for performance enhancement, the unavailability of inductively coupled plasma-mass spectrometry on routine of the accredited laboratories is a factor that reduces its applicability in anti-doping analysis. Therefore, an analytical method for quantification of urinary cobalt as its diethyldithiocarbamate complex by liquid chromatography coupled with high-resolution tandem mass spectrometry was developed and validated. Palladium was proposed as internal standard and rhodium as a complexation control. A microwave-assisted acid digestion of the urine samples was essential, not only to eliminate the matrix effect but mainly to avoid the non-specific bond of cobalt to endogenous molecules. A linear method was obtained over the studied range from a negative urine control to a spiked concentration of 25 ng/mL, with an estimated limit of quantification of 2.5 ng/mL, and an adequate combined standard uncertainty of 11.4%. Considering that all reagents are commercially available, the proposed strategy is feasible to be included on routine sample preparation. Monitoring urinary cobalt concentrations globally opens the perspective to support the anti-doping system to define a suitable threshold value and to understand its potential misuse by athletes seeking for performance improvement.
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Affiliation(s)
- Vanessa Farelo Dos Santos
- Laboratório Brasileiro de Controle de Dopagem, Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
- Laboratório de Química Inorgânica Computacional, Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Gabriel Reis Alves Carneiro
- Laboratório Brasileiro de Controle de Dopagem, Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Bernardo Ferreira Braz
- Laboratório de Desenvolvimento Analítico, Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Ricardo Erthal Santelli
- Laboratório de Desenvolvimento Analítico, Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Sérgio de Paula Machado
- Laboratório de Química Inorgânica Computacional, Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
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Silva TUD, Silva ETD, Lima CHDS, Machado SDP. Molecular modeling of [VO(L 1-4)(R)] complexes (R = bipyridine, phenanthroline): DFT study of antioxidant activity, DNA binding and evaluation of electron-donating and -withdrawing substituent groups. J Mol Graph Model 2023; 124:108577. [PMID: 37536232 DOI: 10.1016/j.jmgm.2023.108577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2023] [Revised: 07/26/2023] [Accepted: 07/27/2023] [Indexed: 08/05/2023]
Abstract
A DFT (density functional theory) study was conducted with eight oxovanadium complexes (C1 - C8) of general formula [VO(L1-4)(R)] (R = bipyridine, phenanthroline; L1-4 = group of ligands derived from dithiocarbamate). The obtained geometries showed a good correlation with the experimental structures. Molecular orbital analysis revealed that the contribution of the L-ligand in the SOMO (single-occupied molecular orbital) of the complexes correlated with the experimental antioxidant activity (IC50), while the contribution of the R-ligand to the LUMO (lowest unoccupied molecular orbital) of the complexes correlated with the experimental complex-DNA interaction (Kb). It has been identified that the presence of an electron-donating substituent group (such as -NH2) in the C5 - C6 structures should enhance these complexes' antioxidant and DNA interaction activities.
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Affiliation(s)
- Talis Uelisson da Silva
- Instituto de Química, Universidade Federal Rural Do Rio de Janeiro, 23890-000, Seropédica, RJ, Brazil; Instituto de Química, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, 21945-970, Brazil.
| | | | | | - Sérgio de Paula Machado
- Instituto de Química, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, 21945-970, Brazil
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Silva TUD, Silva ET, Albuquerque MG, Lima CHDS, Machado SDP. DFT calculations of copper complexes mimicking superoxide dismutase and docking studies and molecular dynamics of the transition metal complex binding to serum albumin. J Biomol Struct Dyn 2023:1-11. [PMID: 37753772 DOI: 10.1080/07391102.2023.2259479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/28/2023]
Abstract
Superoxide dismutase (SOD) is a metalloenzyme whose antioxidant activity is mimicked by some transition metal complexes, and such ability can be added in proteins such as the bovine serum albumin (BSA), creating a hybrid protein. In this work, density functional theory (DFT) calculations of three Cu(II)-complexes of general formula [CuL2phen] (phen = phenanthroline; C1, L = mefenamate; C2, L = tolfenamate; C3, L = flufenamate) with SOD-like activity, and docking and molecular dynamics (MD) simulations of these complexes with the BSA were performed. The DFT calculations revealed that the complex reduction involves Cu(II) → Cu(I) reduction, the theoretical electron affinity (EA) correlated with the SOD-like activity (IC50), and the contribution of the phenanthroline ligand and the metal in LUMO it's related with the complex-protein interaction (KVS). The docking and MD simulations revealed the binding site of the complexes in BSA and the residues involved in the binding. The stability of the Cu(II) and Cu(I) forms of the complexes in the site indicated that the catalysis promoted by these complexes occurs in the same region of the BSA and that their mimetic activity can be incorporated into BSA, creating a hybrid protein (BSA with SOD activity)Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Talis Uelisson da Silva
- Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
- Universidade Federal Rural do Rio de Janeiro, Seropédica, Brazil
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da Silva TU, Pougy KDC, Albuquerque MG, Lima CHDS, Machado SDP. Molecular dynamics simulations of aqueous systems of inhibitor candidates for adenosine-5’-phosphosufate reductase. J Biomol Struct Dyn 2022; 41:2466-2477. [PMID: 35100944 DOI: 10.1080/07391102.2022.2033137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Molecular dynamics (MD) simulations were used to evaluate some chelating agents as potential candidates to inhibitors for dissimilatory adenosine-5'-phosphosulfate reductase (APSrAB). Molecular docking methods were used to evaluate the best binding modes of these molecules to the enzyme at two binding sites: of the substrate (enzyme active site) by mean the redocking protocol of substrate; and of one of the [Fe4S4]2+ groups by mean of the clusterization protocol. The best docking poses were selected by criteria such as low energy and RMSD (redocking) and the cluster with the higher number of similar poses (clusterization), which were submitted to MD simulations. RMSD, RDF, and hydrogen bonds results revelated that all ligands left the cube site, while in the active site, some ligands remained in their docking region, pointing to the enzyme active site as the best target for the selected ligands. The binding energy results of ligands hydroxamic acid (HXA) and catechol (CAT) showed that they bonded favorably to the enzyme and key residues of the active site contributed significantly to the protein-ligand bind, indicating HAX and CAT may compete with the substrate for interactions with these residues and displaying potential as candidates for experimental studies about APSrAB inhibitors.Communicated by Ramaswamy H. Sarma.
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Uelisson da Silva T, Tomaz da Silva E, de Carvalho Pougy K, Henrique da Silva Lima C, de Paula Machado S. Molecular modeling of indazole-3-carboxylic acid and its metal complexes (Zn, Ni, Co, Fe and Mn) as NO synthase inhibitors: DFT calculations, docking studies and molecular dynamics simulations. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2021.109120] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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de Azeredo LCA, da Silva VHM, Marques MM, Ferreira GB, de Paula Machado S. Spectroscopic and Crystallographic Studies of the Complex tris(O-propyldithiocarbonate)cobalt(III). J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.129997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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da Silva TU, Pougy KDC, Albuquerque MG, da Silva Lima CH, Machado SDP. Development of parameters compatible with the CHARMM36 force field for [Fe 4S 4] 2+ clusters and molecular dynamics simulations of adenosine-5'-phosphosulfate reductase in GROMACS 2019. J Biomol Struct Dyn 2020; 40:3481-3491. [PMID: 33183173 DOI: 10.1080/07391102.2020.1847687] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
DFT calculations were used to obtain parameters compatible with the CHARMM36 force field for iron-sulfur clusters (Fe-S) of the type [Fe4S4]2+ that are coordinated to dissimilatory adenosine-5'-phosphosulfate reductase (APSrAB). Classical molecular dynamics (MD) simulations were performed on two APSrAB systems to validate the parameters and verify the stability of the studied systems. The time analysis of the parameters inserted into the force field was in reasonable agreement with the experimental X-ray diffraction data. The analysis of the time evolution of the studied systems indicated that these systems and, in particular, the clusters in their respective cavities had a good stability and were in agreement with what was observed in previous works. The parameters obtained provide the basis for the study of APSrAB as well as other systems that contain [Fe4S4]2+ through the CHARMM36 force field.
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da Silva ET, da Silva TU, de Carvalho Pougy K, da Silveira RB, da Silva RS, Machado SDP. A DFT study of cis-[Ru(NO)(NO2)bpy(dye)2]+ complexes as NO donors. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2020.119724] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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da Silva TU, da Silva ET, Lima CHDS, Machado SDP. Theoretical study of binuclear Cu-M complexes (M = Zn, Cu, Ni) with p-xylylene-bridged-bis(1,4,7-triazacyclononane) ligands: Possible CuZnSOD mimics. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2019.119232] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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da Silva RS, de Lima RG, de Paula Machado S. Design, Reactivity, and Biological Activity of Ruthenium Nitrosyl Complexes. ADVANCES IN INORGANIC CHEMISTRY 2015. [DOI: 10.1016/bs.adioch.2014.11.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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Machado SDP. A política de inovação e a formação do químico. QUIM NOVA 2013. [DOI: 10.1590/s0100-40422013000600030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Souza ET, Castro LC, Castro FAV, do Canto Visentin L, Pinheiro CB, Pereira MD, de Paula Machado S, Scarpellini M. Synthesis, characterization and biological activities of mononuclear Co(III) complexes as potential bioreductively activated prodrugs. J Inorg Biochem 2009; 103:1355-65. [PMID: 19665800 DOI: 10.1016/j.jinorgbio.2009.07.008] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2009] [Revised: 07/08/2009] [Accepted: 07/10/2009] [Indexed: 11/17/2022]
Abstract
Aiming to investigate the use of tridentate ligands to develop new bireductively activated prodrugs, two N(2)O-donor ligands (HL1: [(2-hydroxybenzyl)(2-(imidazol-2-yl)ethyl)]amine; and HL2: [(2-hydroxybenzyl)(2-(pyridil-2-yl)ethyl]amine) were used to synthesize new Co(III) complexes, 1 and 2. Both complexes were characterized by X-ray crystallography, mass spectrometry, electrochemistry, IR, UV-visible and (1)H NMR spectroscopies. Electrochemical data in methanol revealed that the Co(III)-->Co(II) reduction of 1 (-0.84V vs. normal hydrogen electrode - NHE) is more positive than 2 (-1.13V vs. NHE), while it was expected to be more negative due to better sigma-donor ability of imidazole ring in HL1, compared to pyridine in HL2. Considering that reduction processes on Co(III) center may involve the lowest unoccupied molecular orbital (LUMO), it might play an important role on the electronic properties of the complexes, and could explain the observed redox potentials. Then, geometry optimizations of 1 and 2 were performed using the density functional theory (DFT), and different group participation in their LUMO is demonstrated. Using Saccharomyces cerevisiae cells as eukaryotic model, it is shown that in situ generated reduced species, 1(red) and 2(red), have high capacity to inhibit cellular growth, with IC50 (0.50mM for both complexes) lower than cisplatin IC50 (0.6mM) at the same time of exposure. Regarding to their ability to promote S. cerevisiae cells death, after 24 h, cells became susceptible only when exposed to 1(red) and 2(red): (i) at concentrations higher than 0.5mM in a non-dose dependence, and (ii) in anaerobic metabolism. These data reveal the potential of 1 and 2 as bioreductively activated prodrugs, since their oxidized forms do not present expressive activities when compared to their reduced forms.
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Affiliation(s)
- Elizabeth Teixeira Souza
- Departamento de Química Inorgânica, Instituto de Química, Universidade Federal do Rio de Janeiro, 21945-970 Rio de Janeiro, RJ, Brazil
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Valle EMA, Nascimento FBD, Ferreira AG, Batista AA, Monteiro MCR, Machado SDP, Ellena J, Castellano EE, Azevedo ERD. Sobre uma degenerescência acidental nos deslocamentos químicos de RMN de 31P{¹H} em complexos difosfínicos de rutênio. QUIM NOVA 2008. [DOI: 10.1590/s0100-40422008000400019] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Estrada NM, Garrido FMDS, Medeiros ME, Machado SDP. Química combinatória de materiais com análise por microdifração de raios X. Primeira parte: fundamentos. QUIM NOVA 2005. [DOI: 10.1590/s0100-40422005000400021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Almeida CHF, Machuca-Herrera JO, Machado SDP. Metodologia para obtenção de parâmetros de mecânica molecular aplicados a compostos de coordenação. QUIM NOVA 2002. [DOI: 10.1590/s0100-40422002000600013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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