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Wegermann CA, Pirota V, Monzani E, Casella L, Costa LAS, Novato WTG, Machini MT, da Costa Ferreira AM. Interaction studies of oxindole-derivatives with β-amyloid peptides inhibiting its aggregation induced by metal ions. J Inorg Biochem 2023; 245:112227. [PMID: 37156056 DOI: 10.1016/j.jinorgbio.2023.112227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 04/08/2023] [Accepted: 04/12/2023] [Indexed: 05/10/2023]
Abstract
Some hydrazones and Schiff bases derived from isatin, an endogenous oxindole formed in the metabolism of tryptophan, were obtained to investigate their effects on in vitro aggregation of β-amyloid peptides (Aβ), macromolecules implicated in Alzheimer's disease. Some hydrazone ligands, prepared by condensation reactions of isatin with hydrazine derivatives, showed a large affinity binding to the synthetic peptides Aβ, particularly to Aβ1-16. Measurements by NMR spectroscopy indicated that those interactions occur mainly at the metal binding site of the peptide, involving His6, His13, and His14 residues, and that hydrazone E-diastereoisomer interacts preferentially with the amyloid peptides. Experimental results were consistent with simulations using a docking approach, where it is demonstrated that the amino acid residues Glu3, His6, His13, and His14 are those that mostly interact with the ligands. Further, these oxindole-derived ligands can efficiently chelate copper(II) and zinc(II) ions, forming moderate stable [ML] 1:1 species. The corresponding formation constants were determined by UV/Vis spectroscopy, by titrations of the ligands with increasing amounts of metal salts, and the obtained log K values were in the range 2.74 to 5.11. Both properties, good affinity for amyloid peptides, and reasonably good capacity of chelating biometal ions, like copper and zinc, can explain the efficient inhibition of Aβ fragments aggregation, as shown by experiments carried out with the oxindole derivatives in the presence of metal ions.
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Affiliation(s)
- Camila Anchau Wegermann
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, São Paulo, SP, Brazil.
| | - Valentina Pirota
- Dipartimento di Chimica, Università degli Studi di Pavia, Pavia, Italy.
| | - Enrico Monzani
- Dipartimento di Chimica, Università degli Studi di Pavia, Pavia, Italy.
| | - Luigi Casella
- Dipartimento di Chimica, Università degli Studi di Pavia, Pavia, Italy.
| | - Luiz Antônio Sodré Costa
- NEQC - Núcleo de Estudos em Química Computacional, Departamento de Química, ICE, Universidade Federal de Juiz de Fora, MG, Brazil.
| | - Willian Tássio Gomes Novato
- NQTCM, Núcleo de Química Teórica e Computacional de Macaé, Instituto Multidisciplinar de Química, CM UFRJ Macaé, Universidade Federal do Rio de Janeiro, RJ, Brazil.
| | - M Teresa Machini
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, São Paulo, SP, Brazil.
| | - Ana Maria da Costa Ferreira
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, São Paulo, SP, Brazil.
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2
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Couto RAA, Miguel RB, Vieira EG, Brendlé J, Limousy L, Constantino VRL, Ferreira AMDC. Synthetic beidellite clay as nanocarrier for delivery of antitumor oxindolimine-metal complexes. J Inorg Biochem 2023; 240:112099. [PMID: 36584559 DOI: 10.1016/j.jinorgbio.2022.112099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 11/28/2022] [Accepted: 12/07/2022] [Indexed: 12/13/2022]
Abstract
Studies on the immobilization of oxindolimine‑copper(II) or zinc(II) complexes [ML] in synthetic beidellite (BDL) clay were developed to obtain a suitable inorganic carrier capable of promoting the modified-release of metallopharmaceuticals. Previous investigations have shown that the studied metal complexes are promising antitumor agents, targeting DNA, mitochondria, and some proteins. They can bind to DNA, causing oxidative damage via formation of reactive oxygen species (ROS). In mitochondria they lead to a decrease in membrane potential, acting as decoupling agents, and therefore efficiently inducing apoptosis. Additionally, they inhibit human topoisomerase IB and cyclin dependent kinases, proteins involved in the cell cycle. BDL clays in the sodium form were synthesized under hydrothermal conditions and characterized by a set of physicochemical techniques while the BDL-[ML] hybrid materials were prepared by ion exchange method. The characterization of pristine clay and the obtained hybrids were performed by Infrared, Raman, electron paramagnetic resonance and energy dispersive X-ray spectroscopies, thermogravimetric analysis, scanning electron microscopy, X-ray powder diffraction, specific surface area, zeta potential and surface ionic charge measurements. The [ML] release assays under the same cell incubation conditions were performed monitoring metals by X-ray fluorescence. The BDL-[CuL] hybrid materials were stable and able to derail tumor HeLa cells, with corresponding IC50 values in the 0.11-0.41 mg mL-1 range. By contrast, the analogous hybrid samples of zinc(II) and the pristine BDL proved to be non-toxic facing the same cells. These results indicate a promising possibility of using synthetic beidellite as a carrier of such antitumor metal complexes.
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Affiliation(s)
- Ricardo Alexandre Alves Couto
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes 748, 05508-000 São Paulo, SP, Brazil.
| | - Rodrigo Bernardi Miguel
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes 748, 05508-000 São Paulo, SP, Brazil
| | - Eduardo Guimarães Vieira
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes 748, 05508-000 São Paulo, SP, Brazil
| | - Jocelyne Brendlé
- Institut de Science des Matériaux de Mulhouse, CNRS UMR 7361, Université de Haute-Alsace, Université de Strasbourg, 3b rue Alfred Werner, 68093 Mulhouse, cedex, France.
| | - Lionel Limousy
- Institut de Science des Matériaux de Mulhouse, CNRS UMR 7361, Université de Haute-Alsace, Université de Strasbourg, 3b rue Alfred Werner, 68093 Mulhouse, cedex, France.
| | - Vera Regina Leopoldo Constantino
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes 748, 05508-000 São Paulo, SP, Brazil.
| | - Ana Maria Da Costa Ferreira
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes 748, 05508-000 São Paulo, SP, Brazil.
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Ferraz de Paiva RE, Vieira EG, Rodrigues da Silva D, Wegermann CA, Costa Ferreira AM. Anticancer Compounds Based on Isatin-Derivatives: Strategies to Ameliorate Selectivity and Efficiency. Front Mol Biosci 2021; 7:627272. [PMID: 33614708 PMCID: PMC7889591 DOI: 10.3389/fmolb.2020.627272] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2020] [Accepted: 12/28/2020] [Indexed: 01/10/2023] Open
Abstract
In this review we compare and discuss results of compounds already reported as anticancer agents based on isatin-derivatives, metalated as well as non-metallated. Isatin compounds can be obtained from plants, marine animals, and is also found in human fluids as a metabolite of amino acids. Its derivatives include imines, hydrazones, thiosemicarbazones, among others, already focused on numerous anticancer studies. Some of them have entered in pre-clinical and clinical tests as antiangiogenic compounds or inhibitors of crucial proteins. As free ligands or coordinated to metal ions, such isatin derivatives showed promising antiproliferative properties against different cancer cells, targeting different biomolecules or organelles. Binding to metal ions usually improves its biological properties, indicating a modulation by the metal and by the ligand in a synergistic process. They also reveal diverse mechanisms of action, being able of binding DNA, generating reactive species that cause oxidative damage, and inhibiting selected proteins. Strategies used to improve the efficiency and selectivity of these compounds comprise structural modification of the ligands, metalation with different ions, syntheses of mononuclear and dinuclear species, and use of inserted or anchored compounds in selected drug delivery systems.
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Affiliation(s)
| | - Eduardo Guimarães Vieira
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, São Paulo, Brazil
| | - Daniel Rodrigues da Silva
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, São Paulo, Brazil
| | - Camila Anchau Wegermann
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, São Paulo, Brazil
| | - Ana Maria Costa Ferreira
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, São Paulo, Brazil
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4
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Mamián-López MB, Bernardi Miguel R, Araki K, A Temperini ML, da Costa Ferreira AM. Multivariate probing of antitumor metal-based complexes damage on living cells through Raman imaging. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 244:118838. [PMID: 32862078 DOI: 10.1016/j.saa.2020.118838] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 08/06/2020] [Accepted: 08/10/2020] [Indexed: 06/11/2023]
Abstract
Intracellular modifications caused by two metal-based antitumor compounds were assessed by confocal Raman imaging assisted by multivariate curve resolution method, a very powerful deconvolution tool that can be used to extract the characteristic spectral profile of the individual or "purest" components from an image dataset. The use of this Raman methodology has the advantage of being non-invasive and totally label-free. Four main different intracellular processes were observed under the Raman imaging and multivariate approach combination, and even, significant differences could be identified between the treatments with both metallodrugs. Leakage of the nucleus and nucleolus content into the cytoplasm, along with releasing of cytochrome c were observed for the treatment with the Cu-based complex. At the same time, changes of hydrogen-bonding network were also evidenced, indicating an apoptotic cellular death process, consistent with complementary Total Reflection X-Ray fluorescence (TXRF) and fluorescence experiments attesting mitochondria and DNA as main targets after uptake of the complex by cells. For treatment with the Zn-based complex, changes associated with cytochrome c were not detected, neither a rapid leakage of nucleus content upon 24 h treatment. The hydrogen-bonding network also followed a quite different pattern, suggesting that with this metallodrug, the cellular death follows a different mechanism.
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Affiliation(s)
- Mónica Benicia Mamián-López
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes 748, 05508-000, SP, Brazil; Federal University of ABC, Av. dos Estados, 5001, 09210-580 Santo André, SP, Brazil.
| | - Rodrigo Bernardi Miguel
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes 748, 05508-000, SP, Brazil
| | - Koiti Araki
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes 748, 05508-000, SP, Brazil
| | - Marcia L A Temperini
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes 748, 05508-000, SP, Brazil
| | - Ana Maria da Costa Ferreira
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes 748, 05508-000, SP, Brazil
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Yousef MA, Ali AM, El-Sayed WM, Qayed WS, Farag HHA, Aboul-Fadl T. Design and synthesis of novel isatin-based derivatives targeting cell cycle checkpoint pathways as potential anticancer agents. Bioorg Chem 2020; 105:104366. [PMID: 33212312 DOI: 10.1016/j.bioorg.2020.104366] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 09/08/2020] [Accepted: 10/08/2020] [Indexed: 12/13/2022]
Abstract
In recent years, cell cycle and checkpoint pathways regulation are offering new therapeutic approaches against cancer. Isatin, is a well exploited scaffold in the anticancer domain. Accordingly, the current work describes the design and synthesis of two series of (Z)-3-substituted-2-(((E/Z)-5-substituted-2-oxo-1-substituted-indolin-3-ylidene)hydrazinylidene)-thiazolidin-4-ones, 4(a-s) and (E/Z)-1-substituted-3-(((Z)-3-substituted-4-methylthiazol-2(3H)-ylidene)hydrazineylidene)-5-substituted-indolin-2-ones, 5(a-s). The structures of the synthesized molecules were confirmed by spectral and elemental methods of analyses. Pure diastereomers were further identified with 1H-1H-NOESY and confirmed with X-ray crystallography. The target compounds were tested in vitro for their cytotoxicity against three human epithelial cell lines, liver (HepG2), breast (MCF-7), and colon (HT-29) in addition to the diploid human normal cells (WI-38) compared to doxorubicin as a reference drug. Variable cytotoxic effects (IC50 3.29-100 µmol) were reported on the three cancer cell lines with pronounced selectivity compared to the normal one WI-38. The potency of the most active compounds, 4o, 4s, 5e, 5f, 5l, 5m and 5o (IC50 3.29-9.92 µmol), in both series associated with the (Z) configurations of N = thiazolidin/ene or one, however, the configuration of the N = isatin moiety seemed to be of no importance to the activity. The tested compounds were grouped for their possible mechanism of action into 4 categories. Compound 4o with no apparent effect on all genes examined. Compounds 4s and 5o affected all genes investigated and seem to have multiple cellular targets; induced the expression of p53 and caspases, and downregulated that of CDK1. Compounds 5l and 5m directly elevated the expression of initiator and effector caspases without going through p53 pathway. Finally, compounds 5e and 5f elevated the expression of p53 and inhibited CDK1. Compounds 4s, 5e, 5f, 5l, 5m, and 5o caused a significant elevation in the activity of cleaved caspase 3 as well. Docking studies on CDK1 revealed that the active molecules bind to the tested enzyme by the same manner of the co-crystallized ligands and the isatin-thiazoldinone/ene scaffold is essential for binding of these molecules.
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Affiliation(s)
- Mohamed A Yousef
- Department of Medicinal Chemistry, Faculty of Pharmacy, Assuit University, Assuit 71526, Egypt
| | - Ahmed M Ali
- Department of Medicinal Chemistry, Faculty of Pharmacy, Assuit University, Assuit 71526, Egypt
| | - Wael M El-Sayed
- Department of Zoology, Faculty of Science, Ain Shams University, Abbassia 11566, Cairo, Egypt
| | - Wesam S Qayed
- Department of Medicinal Chemistry, Faculty of Pharmacy, Assuit University, Assuit 71526, Egypt.
| | - Hassan H A Farag
- Department of Medicinal Chemistry, Faculty of Pharmacy, Assuit University, Assuit 71526, Egypt
| | - Tarek Aboul-Fadl
- Department of Medicinal Chemistry, Faculty of Pharmacy, Assuit University, Assuit 71526, Egypt.
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Heterobinuclear copper(II)‑platinum(II) complexes with oxindolimine ligands: Interactions with DNA, and inhibition of kinase and alkaline phosphatase proteins. J Inorg Biochem 2019; 203:110863. [PMID: 31683126 DOI: 10.1016/j.jinorgbio.2019.110863] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Revised: 09/12/2019] [Accepted: 09/14/2019] [Indexed: 01/22/2023]
Abstract
Two mononuclear copper(II) compounds, [Cu(isad)(H2O)Cl]Cl 1 and [Cu(isah)(H2O)Cl]Cl 2, and its corresponding heterobinuclear species containing also platinum(II), [CuCl(isad)Pt(NH3)Cl2] 3 and [CuCl(isah)Pt(NH3)Cl2] 4 (where isad and isah are oxindolimine ligands, (E)-3-(2-(3-aminopropylamino)ethylimino)indolin-2-one, and (E)-3-(3-amino-2-hydroxypropylimino)indolin-2-one, respectively), have been previously synthesized and characterized by different spectroscopic techniques in our laboratory. Cytotoxicity assays performed with B16F10 murine cancer cells, and MES-SA human uterine sarcoma cells, showed IC50 values lower or in the same order of cisplatin. Herein, in order to better elucidate their probable modes of action, possible interaction and damage to DNA, as well as their effect on the activity of crucial proteins were verified. Both mononuclear complexes and the binuclear compound 4 displayed a significant cleavage activity toward plasmid DNA, while compound 3 tends to protect DNA from oxidative damage, avoiding degradation. Complementary experiments indicated a significant inhibition activity toward cyclin-dependent kinase (CDK1/cyclinB) activity in the phosphorylation of histone H1, and only moderate inhibition concerning alkaline phosphatase. Results also revealed that the reactivity is reliant on the ligand structure and on the nature of the metal present, in a synergistic effect. Simulation studies complemented and supported our results, indicating different bindings of the binuclear compounds to DNA. Therefore, the verified cytotoxicity of these complexes comprises multiple modes of action, including modification of DNA conformation, scission of DNA strands by reactive oxygen species, and inhibition of selected proteins that are crucial to the cellular cycle.
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Oxidative Assets Toward Biomolecules and Cytotoxicity of New Oxindolimine-Copper(II) and Zinc(II) Complexes. INORGANICS 2019. [DOI: 10.3390/inorganics7020012] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
A new oxindolimine ligand derived from isatin (1H-indole-2,3-dione) and 2-aminomethylbenzimidazole was synthesized, leading to two novel complexes after metalation with copper(II) perchlorate or zinc(II) chloride, [Cu(isambz)2](ClO4)2 (complex 1) and [Zn(isambz)Cl2] (complex 2). This new ligand was designed as a more lipophilic compound, in a series of oxindolimine–metal complexes with antitumor properties, having DNA, mitochondria, and some proteins, such as CDK1 kinase and topoisomerase IB, as key targets. The new complexes had their reactivity to human serum albumin (HSA) and DNA, and their cytotoxicity toward tumor cells investigated. The binding to CT-DNA was monitored by circular dichroism (CD) spectroscopy and fluorescence measurements using ethidium bromide in a competitive assay. Consequent DNA cleavage was verified by gel electrophoresis with complex 1, in nmolar concentrations, with formation of linear DNA (form III) after 60 min incubation at 37 °C, in the presence of hydrogen peroxide, which acts as a reducing agent. Formation of reactive oxygen species (ROS) was observed, monitored by spin trapping EPR. Interaction with HSA lead to α-helix structure disturbance, and formation of a stable radical species (HSA–Tyr·) and carbonyl groups in the protein. Despite showing oxidative ability to damage vital biomolecules such as HSA and DNA, these new complexes showed moderate cytotoxicity against hepatocellular carcinoma (HepG2) and neuroblastoma (SHSY5Y) cells, similarly to previous compounds in this series. These results confirm DNA as an important target for these compounds, and additionally indicate that oxidative damage is not the leading mechanism responsible for their cytotoxicity. Additionally, this work emphasizes the importance of ligand characteristics and of speciation in activity of metal complexes.
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Dario BS, Fernandes Neto F, Portes MC, Boni Fazzi R, Rodrigues da Silva D, Peterson EJ, Farrell NP, Castelli S, Desideri A, Petersen PAD, Petrilli HM, Da Costa Ferreira AM. DNA binding, cytotoxic effects and probable targets of an oxindolimine–vanadyl complex as an antitumor agent. NEW J CHEM 2019. [DOI: 10.1039/c9nj02480h] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The vanadyl–oxindolimine complex as an antitumor agent.
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Affiliation(s)
- Bruno Soares Dario
- Instituto de Química
- Universidade de São Paulo
- Av. Prof. Lineu Prestes
- 748 – São Paulo 05508-000
- Brazil
| | - Francisco Fernandes Neto
- Instituto de Química
- Universidade de São Paulo
- Av. Prof. Lineu Prestes
- 748 – São Paulo 05508-000
- Brazil
| | - Marcelo Cecconi Portes
- Instituto de Química
- Universidade de São Paulo
- Av. Prof. Lineu Prestes
- 748 – São Paulo 05508-000
- Brazil
| | - Rodrigo Boni Fazzi
- Instituto de Química
- Universidade de São Paulo
- Av. Prof. Lineu Prestes
- 748 – São Paulo 05508-000
- Brazil
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9
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Guimarães Vieira E, Miguel RB, Rodrigues da Silva D, Boni Fazzi R, de Couto RAA, Marin JH, Temperini MLA, da Silva Shinohara J, Toma HE, Russo LC, Magalhães YT, Dias Filho NL, Forti FL, da Costa Ferreira AM. Functionalized nanoparticles as adjuvant to increase the cytotoxicity of metallodrugs toward tumor cells. NEW J CHEM 2019. [DOI: 10.1039/c8nj04654a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Silica nanoparticles increasing the cytotoxicity of copper(ii) and zinc(ii) metallodrugs.
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10
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de Paula QA, Joly JP, Selmeczi K, Fonseca DEP, Caramori GF, Farrell NP, Da Costa Ferreira AM. Binding affinity studies of 1,2,3-triazole copper(II) complexes to human serum albumin. J COORD CHEM 2018. [DOI: 10.1080/00958972.2018.1495331] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Queite A. de Paula
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, São Paulo, Brazil
- Department of Chemistry, Virginia Commonwealth University, Richmond, VA, USA
| | - Jean-Pierre Joly
- L2CM UMR 7053 CNRS, Université de Lorraine, Faculté des Sciences, Vandoeuvre-lès-Nancy, France
| | - Katalin Selmeczi
- L2CM UMR 7053 CNRS, Université de Lorraine, Faculté des Sciences, Vandoeuvre-lès-Nancy, France
| | - David E. P. Fonseca
- Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil
| | - Giovanni F. Caramori
- Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil
| | - Nicholas P. Farrell
- Department of Chemistry, Virginia Commonwealth University, Richmond, VA, USA
| | - Ana M. Da Costa Ferreira
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, São Paulo, Brazil
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Castelli S, Gonçalves MB, Katkar P, Stuchi GC, Couto RAA, Petrilli HM, da Costa Ferreira AM. Comparative studies of oxindolimine-metal complexes as inhibitors of human DNA topoisomerase IB. J Inorg Biochem 2018; 186:85-94. [PMID: 29860208 DOI: 10.1016/j.jinorgbio.2018.05.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Revised: 05/18/2018] [Accepted: 05/20/2018] [Indexed: 12/17/2022]
Affiliation(s)
- Silvia Castelli
- Department of Biology, University of Rome Tor Vergata, Via Della Ricerca Scientifica, Rome 00133, Italy
| | - Marcos Brown Gonçalves
- Departamento de Física, Universidade Tecnológica Federal do Paraná, 80230-901 Curitiba, PR, Brazil
| | - Prafulla Katkar
- Department of Biology, University of Rome Tor Vergata, Via Della Ricerca Scientifica, Rome 00133, Italy
| | - Gabriela Cristina Stuchi
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, 05508-000 São Paulo, SP, Brazil
| | - Ricardo Alexandre Alves Couto
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, 05508-000 São Paulo, SP, Brazil
| | - Helena Maria Petrilli
- Departamento de Física dos Materiais e Mecânica, Instituto de Física, Universidade de São Paulo, 05508-090 São Paulo, SP, Brazil
| | - Ana Maria da Costa Ferreira
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, 05508-000 São Paulo, SP, Brazil.
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Kumar A. A small-molecule acts as a 'roadblock' on DNA, hampering its fundamental processes. J Inorg Biochem 2017; 176:134-139. [PMID: 28892676 DOI: 10.1016/j.jinorgbio.2017.08.023] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Revised: 08/02/2017] [Accepted: 08/25/2017] [Indexed: 12/24/2022]
Abstract
DNA replication, RNA and protein synthesis are the most fundamental housekeeping processes involved in an organism's growth. Failure or dysregulation of these pathways are often deleterious to life. Therefore, selective inhibition of such processes can be crucial for the inhibition of the growth of any cell, including cancer cells, pathogenic bacteria or other deadly microbes. In the present study, a Zn2+ complex is shown to act as a roadblock of DNA. The Zn2+ complex inhibited DNA taq polymerase activity under the in vitro conditions of polymerase chain reaction (PCR). Under in vivo conditions, it readily crosses the cell wall of gram-negative bacteria (Escherichia coli), leading to the reduction of RNA levels as well as protein content. Growth of pathogenic bacteria (e.g., Staphylococcus aureus and Pseudomonas aeruginosa) was also significantly retarded. The Zn2+ complex binds to the grooves of the DNA without inducing conformational changes or exhibiting chemical nuclease activity. To the best current knowledge, this is first coordination complex exhibiting a 'roadblock' property under both in vitro and in vivo conditions (show at all three levels - DNA, RNA and protein). The label-free approach used in this study may offer an alternative route towards fighting pathogenic bacteria or cancer cells by hampering fundamental cellular processes.
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Affiliation(s)
- Amit Kumar
- Astbury Centre for Structural Molecular Biology, School of Molecular and Cellular Biology, University of Leeds, Leeds LS2 9JT, UK; Institute of Physics, Biophysics, Martin-Luther-University Halle-Wittenberg, Germany.
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13
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Yang M, Bierbach U. Metal-Containing Pharmacophores in Molecularly Targeted Anticancer Therapies and Diagnostics. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201601149] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Mu Yang
- Department of Chemistry; Wake Forest University; 27109 Winston-Salem North Carolina USA
| | - Ulrich Bierbach
- Department of Chemistry; Wake Forest University; 27109 Winston-Salem North Carolina USA
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14
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Aranda EE, Matias TA, Araki K, Vieira AP, de Mattos EA, Colepicolo P, Luz CP, Marques FLN, da Costa Ferreira AM. Design, syntheses, characterization, and cytotoxicity studies of novel heterobinuclear oxindolimine copper(II)-platinum(II) complexes. J Inorg Biochem 2016; 165:108-118. [PMID: 27503192 DOI: 10.1016/j.jinorgbio.2016.08.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Revised: 07/28/2016] [Accepted: 08/01/2016] [Indexed: 12/14/2022]
Abstract
Herein, the design and syntheses of two new mononuclear oxindolimine-copper(II) (1 and 2) and corresponding heterobinuclear oxindolimine Cu(II)Pt(II) complexes (3 and 4), are described. All the isolated complexes were characterized by spectroscopic techniques (UV/Vis, IR, EPR), in addition to elemental analysis and mass spectrometry. Cyclic voltammetry (CV) measurements showed that in all cases, one-electron quasi-reversible waves were observed, and ascribed to the formation of corresponding copper(I) complexes. Additionally, waves related to oxindolimine ligand reduction was verified, and confirmed using analogous oxindolimine-Zn(II) complexes. The Pt(IV/II) reduction, and corresponding oxidation, for complexes 3 and 4 occurred at very close values to those observed for cisplatin. By complementary fluorescence studies, it was shown that glutathione (GSH) cannot reduce any of these complexes, under the experimental conditions (room temperature, phosphate buffer 50mM, pH7.4), using an excess of 20-fold [GSH]. All these complexes showed characteristic EPR spectral profile, with parameters values gǁ>g⊥ suggesting an axially distorted environment around the copper(II) center. Interactions with calf thymus-DNA, monitored by circular dichroism (CD), indicated different effects modulated by the ligands. Finally, the cytotoxicity of each complex was tested toward different tumor cells, in comparison to cisplatin, and low values of IC50 in the range 0.6 to 4.0μM were obtained, after 24 or 48h incubation at 37°C. The obtained results indicate that such complexes can be promising alternative antitumor agents.
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Affiliation(s)
- Esther Escribano Aranda
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Tiago Araújo Matias
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Koiti Araki
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Adriana Pires Vieira
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Elaine Andrade de Mattos
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, São Paulo, SP, Brazil; Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Pio Colepicolo
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, São Paulo, SP, Brazil; Departamento de Radiologia e Oncologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Carolina Portela Luz
- Departamento de Radiologia e Oncologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Fábio Luiz Navarro Marques
- Departamento de Radiologia e Oncologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Ana Maria da Costa Ferreira
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, São Paulo, SP, Brazil.
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15
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Kumar A, Baumann M, Balbach J. Small Molecule Inhibited Parathyroid Hormone Mediated cAMP Response by N-Terminal Peptide Binding. Sci Rep 2016; 6:22533. [PMID: 26932583 PMCID: PMC4773758 DOI: 10.1038/srep22533] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2015] [Accepted: 02/11/2016] [Indexed: 11/30/2022] Open
Abstract
Ligand binding to certain classes of G protein coupled receptors (GPCRs) stimulates the rapid synthesis of cAMP through G protein. Human parathyroid hormone (PTH), a member of class B GPCRs, binds to its receptor via its N–terminal domain, thereby activating the pathway to this secondary messenger inside cells. Presently, GPCRs are the target of many pharmaceuticals however, these drugs target only a small fraction of structurally known GPCRs (about 10%). Coordination complexes are gaining interest due to their wide applications in the medicinal field. In the present studies we explored the potential of a coordination complex of Zn(II) and anthracenyl–terpyridine as a modulator of the parathyroid hormone response. Preferential interactions at the N–terminal domain of the peptide hormone were manifested by suppressed cAMP generation inside the cells. These observations contribute a regulatory component to the current GPCR–cAMP paradigm, where not the receptor itself, but the activating hormone is a target. To our knowledge, this is the first report about a coordination complex modulating GPCR activity at the level of deactivating its agonist. Developing such molecules might help in the control of pathogenic PTH function such as hyperparathyroidism, where control of excess hormonal activity is essentially required.
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Affiliation(s)
- Amit Kumar
- Astbury Centre for Structural Molecular Biology, School of Molecular and Cellular Biology, University of Leeds, Leeds LS2 9JT, UK.,Institute of Physics, Biophysics, Martin-Luther-University Halle-Wittenberg, Germany
| | - Monika Baumann
- Institute of Physics, Biophysics, Martin-Luther-University Halle-Wittenberg, Germany
| | - Jochen Balbach
- Institute of Physics, Biophysics, Martin-Luther-University Halle-Wittenberg, Germany.,Centre for Structure und Dynamics of Proteins (MZP), Martin-Luther-University Halle-Wittenberg, Germany
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16
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Zhang HR, Liu YC, Meng T, Qin QP, Tang SF, Chen ZF, Zou BQ, Liu YN, Liang H. Cytotoxicity, DNA binding and cell apoptosis induction of a zinc(ii) complex of HBrQ. MEDCHEMCOMM 2015. [DOI: 10.1039/c5md00406c] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A zinc(ii) complex of HBrQ showed higher in vitro antitumor activity. It induced cell apoptosis in BEL-7404 cells via G2 phase arrest, led to mitochondria dysfunction and activation of caspase cascade. The central zinc(ii) should play a key role to enhance the antitumor effect
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Affiliation(s)
- Hai-Rong Zhang
- College of Chemistry and Chemical Engineering
- Central South University
- Changsha
- PR China
- State Key Laboratory Cultivation Base for the Chemistry and Molecular Engineering of Medicinal Resources
| | - Yan-Cheng Liu
- State Key Laboratory Cultivation Base for the Chemistry and Molecular Engineering of Medicinal Resources
- School of Chemistry & Pharmaceutical Sciences
- Guangxi Normal University
- Guilin
- PR China
| | - Ting Meng
- State Key Laboratory Cultivation Base for the Chemistry and Molecular Engineering of Medicinal Resources
- School of Chemistry & Pharmaceutical Sciences
- Guangxi Normal University
- Guilin
- PR China
| | - Qi-Pin Qin
- State Key Laboratory Cultivation Base for the Chemistry and Molecular Engineering of Medicinal Resources
- School of Chemistry & Pharmaceutical Sciences
- Guangxi Normal University
- Guilin
- PR China
| | - Shang-Feng Tang
- State Key Laboratory Cultivation Base for the Chemistry and Molecular Engineering of Medicinal Resources
- School of Chemistry & Pharmaceutical Sciences
- Guangxi Normal University
- Guilin
- PR China
| | - Zhen-Feng Chen
- State Key Laboratory Cultivation Base for the Chemistry and Molecular Engineering of Medicinal Resources
- School of Chemistry & Pharmaceutical Sciences
- Guangxi Normal University
- Guilin
- PR China
| | - Bi-Qun Zou
- State Key Laboratory Cultivation Base for the Chemistry and Molecular Engineering of Medicinal Resources
- School of Chemistry & Pharmaceutical Sciences
- Guangxi Normal University
- Guilin
- PR China
| | - You-Nian Liu
- College of Chemistry and Chemical Engineering
- Central South University
- Changsha
- PR China
| | - Hong Liang
- College of Chemistry and Chemical Engineering
- Central South University
- Changsha
- PR China
- State Key Laboratory Cultivation Base for the Chemistry and Molecular Engineering of Medicinal Resources
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