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Dos Reis JRT, Leite FF, Sharma K, Ribeiro GAS, Silva WHN, Batista AA, Paschoal AR, Paraguassu W, Mazzoni M, Barbosa Neto NM, Araujo PT. Raman Spectroscopy on Free-Base Meso-tetra(4-pyridyl) Porphyrin under Conditions of Low Temperature and High Hydrostatic Pressure. Molecules 2024; 29:2362. [PMID: 38792223 DOI: 10.3390/molecules29102362] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Revised: 04/01/2024] [Accepted: 04/02/2024] [Indexed: 05/26/2024] Open
Abstract
We present a Raman spectroscopy study of the vibrational properties of free-base meso-tetra(4-pyridyl) porphyrin polycrystals under various temperature and hydrostatic pressure conditions. The combination of experimental results and Density Functional Theory (DFT) calculations allows us to assign most of the observed Raman bands. The modifications in the Raman spectra when excited with 488 nm and 532 nm laser lights indicate that a resonance effect in the Qy band is taking place. The pressure-dependent results show that the resonance conditions change with increasing pressure, probably due to the shift of the electronic transitions. The temperature-dependent results show that the relative intensities of the Raman modes change at low temperatures, while no frequency shifts are observed. The experimental and theoretical analysis presented here suggest that these molecules are well represented by the C2v point symmetry group.
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Affiliation(s)
| | - Fabio Furtado Leite
- Graduate Program in Physics, Institute of Natural Sciences, Federal University of Pará, Belém 66075-110, PA, Brazil
- Department of Exact and Technological Sciences, Federal University of Amapá, Macapá 68903-419, AP, Brazil
| | - Keshav Sharma
- Department of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA
| | | | | | - Alzir Azevedo Batista
- Departament of Chemistry, Federal University of São Carlos, São Carlos 13565-905, SP, Brazil
| | | | - Waldeci Paraguassu
- Graduate Program in Physics, Institute of Natural Sciences, Federal University of Pará, Belém 66075-110, PA, Brazil
| | - Mario Mazzoni
- Department of Physics, Federal University of Minas Gerais, Belo Horizonte 31270-901, MG, Brazil
| | - Newton Martins Barbosa Neto
- Graduate Program in Physics, Institute of Natural Sciences, Federal University of Pará, Belém 66075-110, PA, Brazil
| | - Paulo Trindade Araujo
- Department of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA
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de Melo MRS, Ribeiro AB, Fernandes G, Squarisi IS, de Melo Junqueira M, Batista AA, da Silva MM, Tavares DC. Ruthenium(II) complex with 2-mercaptothiazoline ligand induces selective cytotoxicity involving DNA damage and apoptosis in melanoma cells. J Biol Inorg Chem 2024; 29:159-168. [PMID: 38182820 DOI: 10.1007/s00775-023-02036-8] [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: 06/27/2023] [Accepted: 10/26/2023] [Indexed: 01/07/2024]
Abstract
Melanoma is the most aggressive and lethal type of skin cancer due to its characteristics such as high metastatic potential and low response rate to existing treatment modalities. In this way, new drug prototypes are being studied to solve the problem of treating patients with melanoma. Among these, ruthenium-based metallopharmaceuticals may be promising alternatives due to their antitumor characteristics and low systemic toxicity. In this context, the present study evaluated the antineoplastic effect of the ruthenium complex [Ru(mtz)(dppe)2]PF6-2-mercaptothiazoline-di-1,2-bis(diphenylphosphine) ethaneruthenium(II), namely RuMTZ, on human melanoma (A-375) and murine (B16-F10) cells, considering different approaches. Through XTT colorimetric and clonogenic efficiency assays, the complex revealed the selective cytotoxic activity, with the lowest IC50 (0.4 µM) observed for A375 cells. RuMTZ also induced changes in cell morphology, increased cell population in the sub-G0 phase and inhibiting cell migration. The levels of γH2AX and cleaved caspase 3 proteins were increased in both cell lines treated with RuMTZ. These findings indicated that the cytotoxic activity of RuMTZ on melanoma cells is related, at least in part, to the induction of DNA damage and apoptosis. Therefore, RuMTZ exhibited promising antineoplastic activity against melanoma cells.
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Affiliation(s)
| | | | - Gabriela Fernandes
- Laboratory of Mutagenesis, University of Franca, Franca, São Paulo, 14404-600, Brazil
| | - Iara Silva Squarisi
- Laboratory of Mutagenesis, University of Franca, Franca, São Paulo, 14404-600, Brazil
| | | | - Alzir Azevedo Batista
- Department of Chemistry, Federal University of São Carlos, São Carlos, São Paulo, 13565-905, Brazil
| | - Monize Martins da Silva
- Department of Chemistry, Federal University of São Carlos, São Carlos, São Paulo, 13565-905, Brazil
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Palmeira-Mello MV, Caballero AB, Herrera-Ramírez P, Costa AR, Santana SS, Guedes GP, Caubet A, Batista AA, Gamez P, Lanznaster M. Cobalt(III)-py 2en systems as potential carriers of β-ketoester-based ligands. J Inorg Biochem 2023; 248:112345. [PMID: 37562318 DOI: 10.1016/j.jinorgbio.2023.112345] [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: 05/18/2023] [Revised: 07/14/2023] [Accepted: 07/27/2023] [Indexed: 08/12/2023]
Abstract
Two cobalt(III) complexes containing different β-ketoesters, namely [CoIII(L1)(py2en)](ClO4)2·H2O (1) and [CoIII(L2)(py2en)](ClO4)2 (2) (py2en = N,N'-bis(pyridin-2-ylmethyl)ethylenediamine; L1- = methylacetoacetate; L2- = ethyl 4-chloroacetoacetate) have been prepared and investigated as prototypes of bioreductive prodrugs. The presence of β-ketoester and py2en ligands in 1 and 2, as well as the perchlorate counterions, was supported by IR spectroscopy and CHN elemental analysis. The composition molecular structure of both complexes was confirmed by NMR spectroscopy and ESI mass spectrometry. Structural information was also obtained for 2via X-ray diffraction analysis. The redox properties indicate that 1 and 2 are suitable for reduction under biological conditions. Investigation of DNA-interacting suggest that 1 and 2 bind DNA via electrostatic forces. Both complexes may be employed as possible platforms for the delivery of biologically active compounds, since their reaction with ascorbic acid in PBS at pH 6.2 and 7.4 at 37°C results in the release of the β-ketoester ligands upon Co(III)/Co(II) reduction.
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Affiliation(s)
- Marcos V Palmeira-Mello
- Departamento de Química, Universidade Federal de São Carlos (UFSCar), 13561-901 São Carlos, São Paulo, Brazil; Instituto de Química, Universidade Federal Fluminense, Outeiro S. João Batista S/N, 24020-141 Niterói, RJ, Brazil.; nanoBIC, Departament de Química Inorgànica i Orgànica, Secció Química Inorgànica, Facultat de Química, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain
| | - Ana B Caballero
- nanoBIC, Departament de Química Inorgànica i Orgànica, Secció Química Inorgànica, Facultat de Química, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain; Institute of Nanoscience and Nanotechnology (IN2UB), Universitat de Barcelona, 08028 Barcelona, Spain.
| | - Piedad Herrera-Ramírez
- nanoBIC, Departament de Química Inorgànica i Orgànica, Secció Química Inorgànica, Facultat de Química, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain
| | - Analu R Costa
- Departamento de Química, Universidade Federal de São Carlos (UFSCar), 13561-901 São Carlos, São Paulo, Brazil
| | - Savyo S Santana
- Instituto de Química, Universidade Federal Fluminense, Outeiro S. João Batista S/N, 24020-141 Niterói, RJ, Brazil
| | - Guilherme P Guedes
- Instituto de Química, Universidade Federal Fluminense, Outeiro S. João Batista S/N, 24020-141 Niterói, RJ, Brazil
| | - Amparo Caubet
- nanoBIC, Departament de Química Inorgànica i Orgànica, Secció Química Inorgànica, Facultat de Química, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain
| | - Alzir Azevedo Batista
- Departamento de Química, Universidade Federal de São Carlos (UFSCar), 13561-901 São Carlos, São Paulo, Brazil
| | - Patrick Gamez
- nanoBIC, Departament de Química Inorgànica i Orgànica, Secció Química Inorgànica, Facultat de Química, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain; Institute of Nanoscience and Nanotechnology (IN2UB), Universitat de Barcelona, 08028 Barcelona, Spain; Catalan Institution for Research and Advanced Studies (ICREA), Passeig Lluís Companys 23, 08010 Barcelona, Spain
| | - Mauricio Lanznaster
- Instituto de Química, Universidade Federal Fluminense, Outeiro S. João Batista S/N, 24020-141 Niterói, RJ, Brazil..
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Colina-Vegas L, da Cruz B Silva M, de Souza Pereira C, Isis Barros A, Araújo Nobrega J, Navarro M, Rottmann M, D'Alessandro S, Basilico N, Azevedo Batista A, Moreira DRM. Antimalarial Agents Derived from Metal-Amodiaquine Complexes with Activity in Multiple Stages of the Plasmodium Life Cycle. Chemistry 2023; 29:e202301642. [PMID: 37427863 DOI: 10.1002/chem.202301642] [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: 05/23/2023] [Revised: 07/04/2023] [Accepted: 07/05/2023] [Indexed: 07/11/2023]
Abstract
Malaria is the one of the deadliest infectious diseases worldwide. Chemically, quinolines are excellent ligands for metal coordination and are deployed as drugs for malaria treatment. There is a growing body of evidence indicating that metal complexes can be conjugated with antimalarial quinolines to be used as chemical tools to overcome the disadvantages of quinolines, improving their bioactive speciation, cellular distribution, and subsequently broadening the spectrum of activity to multiple stages of the complex Plasmodium life cycle. In this study, four novel complexes of ruthenium(II)- and gold(I)-containing amodiaquine (AQ) were synthesized, and a careful chemical characterization revealed the precise coordination site of AQ to the metals. Their speciation in solution was investigated, demonstrating the stability of the quinoline-metal bond. RuII - and AuI -AQ complexes were demonstrated to be potent and efficacious in inhibiting parasite growth in multiple stages of the Plasmodium life cycle as assayed in vitro and in vivo. These properties could be attributed to the ability of the metal-AQ complexes to reproduce the suppression of heme detoxification induced by AQ, while also inhibiting other processes in the parasite life cycle; this can be attributed to the action of the metallic species. Altogether, these findings indicate that metal coordination with antimalarial quinolines is a potential chemical tool for drug design and discovery in malaria and other infectious diseases susceptible to quinoline treatment.
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Affiliation(s)
- Legna Colina-Vegas
- Instituto de Química, Universidade Federal do Rio Grande do Sul, Porto Alegre, CP 91501-970, RS, Brazil
| | | | - Caroline de Souza Pereira
- Departamento de Química, Universidade Federal de Juiz de Fora, Juiz de Fora, CP 36036-900, MG, Brazil
| | - Ariane Isis Barros
- Departamento de Solos e Engenharia Rural, Universidade Federal de Mato Grosso, Cuiabá, CEP 78060-900, MT, Brazil
| | - Joaquim Araújo Nobrega
- Departamento de Química, Universidade Federal de São Carlos, São Carlos, CP 13565-90, SP, Brazil
| | - Maribel Navarro
- Departamento de Química, Universidade Federal de Juiz de Fora, Juiz de Fora, CP 36036-900, MG, Brazil
| | - Matthias Rottmann
- Swiss Tropical & Public Health Institute, 4123, Allschwil, Switzerland
- University of Basel, 4001, Basel, Switzerland
| | - Sarah D'Alessandro
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, Milan, 20133, Italy
| | - Nicoletta Basilico
- Dipartimento di Scienze Biomediche, Chirurgiche e Odontoiatriche, Universitá degli Studi di Milano, Milan, 20133, Italy
| | - Alzir Azevedo Batista
- Departamento de Química, Universidade Federal de São Carlos, São Carlos, CP 13565-90, SP, Brazil
| | - Diogo R M Moreira
- Instituto Gonçalo Moniz, FIOCRUZ, Salvador, CEP 40296-710, BA, Brazil
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Becceneri AB, Fuzer AM, Lopes AC, da Silva PB, Plutin AM, Batista AA, Chorilli M, Cominetti MR. Nanoencapsulation of Ruthenium Complex Ru(ThySMet): A Strategy to Improve Selective Cytotoxicity Against Breast Tumor Cells in 2D and 3D Culture Models. Curr Drug Discov Technol 2023:CDDT-EPUB-132313. [PMID: 37282638 DOI: 10.2174/1570163820666230606110457] [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] [Received: 03/21/2023] [Revised: 04/24/2023] [Accepted: 05/12/2023] [Indexed: 06/08/2023]
Abstract
BACKGROUND Ruthenium complexes have shown promise in treating many cancers, including breast cancer. Previous studies of our group have demonstrated the potential of the trans-[Ru(PPh3)2(N,N-dimethylN'-thiophenylthioureato-k2O,S)(bipy)]PF6 complex, the Ru(ThySMet), in the treatment of breast tumor cancers, both in 2D and 3D culture systems. Additionally, this complex presented low toxicity when tested in vivo. AIMS Improve the Ru(ThySMet) activity by incorporating the complex into a microemulsion (ME) and testing its in vitro effects. METHODS The ME-incorporated Ru(ThySMet) complex, Ru(ThySMet)ME, was tested for its biological effects in two- (2D) and three-dimensional (3D) cultures using different types of breast cells, MDA-MB-231, MCF-10A, 4T1.13ch5T1 and Balb/C 3T3 fibroblasts. RESULTS An increased selective cytotoxicity of the Ru(ThySMet)ME for tumor cells was found in 2D cell culture, compared with the original complex. This novel compound also changed the shape of tumor cells and inhibited cell migration with more specificity. Additional 3D cell culture tests using the non-neoplastic S1 and the triple-negative invasive T4-2 breast cells have shown that Ru(ThySMet)ME presented increased selective cytotoxicity for tumor cells compared with the 2D results. The morphology assay performed in 3D also revealed its ability to reduce the size of the 3D structures and increase the circularity in T4-2 cells. CONCLUSION These results demonstrate that the Ru(ThySMet)ME is a promising strategy to increase its solubility, delivery, and bioaccumulation in target breast tumors.
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Affiliation(s)
| | | | | | | | | | | | - Marlus Chorilli
- Department of Drugs and Medicines, Sao Paulo State University-UNESP, Brazil
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De Grandis RA, Costa AR, Moraes CAF, Sampaio NZ, Cerqueira IH, Marques WG, Guedes APM, de Araujo-Neto JH, Pavan FR, Demidoff FC, Netto CD, Batista AA, Resende FA. Novel Ru(II)-bipyridine/phenanthroline-lapachol complexes as potential anti-cancer agents. J Inorg Biochem 2022; 237:112005. [PMID: 36155170 DOI: 10.1016/j.jinorgbio.2022.112005] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Revised: 09/05/2022] [Accepted: 09/13/2022] [Indexed: 01/18/2023]
Abstract
For the first time, we herein report on the syntheses of two new Ru(II)/bipyridine/phenanthroline complexes containing lapachol as ligand: complex (1), [Ru (bipy)2(Lap)]PF6 and complex (2), [Ru(Lap)(phen)2]PF6, where bipy = 2,2'-bipyridine and ph en = 1,10-phenanthroline; Lap = lapachol (2-hydroxy-3-(3-methylbut-2-en-1- yl)naphthalene-1,4-dione). The complexes were synthesized and characterized by elemental analyses, molar conductivity, mass spectrometry, ultraviolet-visible and infrared spectroscopies, nuclear magnetic resonance (1H, 13C), and single crystal X-ray diffraction, for complex (2). In addition, in vitro cytotoxicity was tested against six cancer cells: A549 (lung carcinoma); DU-145 (human prostate carcinoma); HepG2 (human hepatocellular carcinoma), PC-3 (human prostate adenocarcinoma); MDA-MB-231 (human breast adenocarcinoma); Caco-2 (human colorectal adenocarcinoma), and against two non-cancer cells, FGH (human gingival normal fibroblasts) and PNT-2 (prostate epithelial cells). Complex (1) was slightly more toxic and selective than complex (2) for all cell lines, except against the A549 cells, where (2) was more potent than complex (1). The complexes induced an increase in the reactive oxygen species, and the co-treatment with N-acetyl-L-cysteine remarkably suppressed the ROS generation and prevented the reduction of cell viability, suggesting that the cytotoxicity of the complexes is related to the ROS-mediated pathway. Further studies indicated that the complexes may bind to DNA via minor groove interaction. Our studies also revealed that free Lap induces gene mutations in Salmonella Typhimurium, nevertheless, the complexes demonstrated the absence of genotoxicity by the Ames test. The present study provides a relevant contribution to understanding the anti-cancer potential and genetic toxicological events of new ruthenium complexes containing the lapachol molecule as a ligand.
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Affiliation(s)
- Rone Aparecido De Grandis
- UNIARA - University of Araraquara, Department of Biological Sciences and Health, Araraquara, São Paulo, Brazil; UFSCar - Federal University of São Carlos, Department of Chemistry, São Carlos, São Paulo, Brazil.
| | - Analu Rocha Costa
- UFSCar - Federal University of São Carlos, Department of Chemistry, São Carlos, São Paulo, Brazil
| | | | - Natália Zaneti Sampaio
- UNIARA - University of Araraquara, Department of Biological Sciences and Health, Araraquara, São Paulo, Brazil
| | - Igor Henrique Cerqueira
- UNIARA - University of Araraquara, Department of Biological Sciences and Health, Araraquara, São Paulo, Brazil
| | - Wellington Garcia Marques
- UNIARA - University of Araraquara, Department of Biological Sciences and Health, Araraquara, São Paulo, Brazil
| | | | | | - Fernando Rogério Pavan
- UNESP - São Paulo State University, Department of Biological Sciences, School of Pharmaceutical Sciences, Araraquara, São Paulo, Brazil
| | | | - Chaquip Daher Netto
- UFRJ - Federal University of Rio de Janeiro, Institute of Chemistry, Macaé, Rio de Janeiro, Brazil
| | - Alzir Azevedo Batista
- UFSCar - Federal University of São Carlos, Department of Chemistry, São Carlos, São Paulo, Brazil.
| | - Flávia Aparecida Resende
- UNIARA - University of Araraquara, Department of Biological Sciences and Health, Araraquara, São Paulo, Brazil.
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Rinaldi-Neto F, Ribeiro AB, Ferreira NH, Squarisi IS, Oliveira KM, Orenha RP, Parreira RLT, Batista AA, Tavares DC. Anti-melanoma effect of ruthenium(II)-diphosphine complexes containing naphthoquinone ligand. J Inorg Biochem 2021; 222:111497. [PMID: 34090039 DOI: 10.1016/j.jinorgbio.2021.111497] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 11/06/2020] [Revised: 05/21/2021] [Accepted: 05/26/2021] [Indexed: 12/18/2022]
Abstract
The use of natural products as potential ligands has been explored as a strategy in the development of metal-based chemotherapy. Since ruthenium complexes are promising alternatives to traditional antitumor agents, this study evaluated the anti-melanoma potential of two ruthenium(II) complexes containing the naphthoquinone ligands lapachol (lap), [Ru(lap)(dppm)2]PF6, and lawsone (law), [Ru(law)(dppm)2]PF6, in addition to the bis(diphenylphosphino)methane (dppm) ligand, referred to as complexes (1) and (2), respectively, using a syngeneic murine melanoma model. Activation of the apoptotic pathway by the treatments was assessed by immunohistochemistry in tumor tissue. Additionally, toxicity of the treatments was evaluated by variation in body and organ weight, quantification of biochemical indicators of renal damage, and genotoxicity in bone marrow and hepatocytes. First, the antiproliferative activity of (1) and (2) was observed in B16F10 cells, with IC50 values of 2.78 and 1.68 μM, respectively. The results obtained in mice showed that, unlike complex (1), (2) possesses significant anti-melanoma activity demonstrated by a reduction in tumor volume and mass (88.42%), as well as in mitosis frequency (83.86%). Additionally, complex (2) increased the levels of cleaved caspase-3, inducing tumor cell apoptosis. When compared to the metallodrug cisplatin, complex (2) exhibited similar anti-melanoma activity and lower toxicity considering all parameters evaluated. In silico studies demonstrated no difference in the binding energy of the naphthoquinone complex between complexes (1) and (2). However, the complex containing the lawsone ligand has a lower molar volume, which may be important for interactions with minor DNA grooves. The present results demonstrate the antitumor efficiency of complex (2) and a significantly lower systemic toxicity compared to cisplatin.
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Affiliation(s)
- Francisco Rinaldi-Neto
- Universidade de Franca, Avenida Dr. Armando Salles Oliveira, 201 - Parque Universitário, Franca, São Paulo 14404-600, Brazil
| | - Arthur Barcelos Ribeiro
- Universidade de Franca, Avenida Dr. Armando Salles Oliveira, 201 - Parque Universitário, Franca, São Paulo 14404-600, Brazil
| | - Natália Helen Ferreira
- Universidade de Franca, Avenida Dr. Armando Salles Oliveira, 201 - Parque Universitário, Franca, São Paulo 14404-600, Brazil
| | - Iara Silva Squarisi
- Universidade de Franca, Avenida Dr. Armando Salles Oliveira, 201 - Parque Universitário, Franca, São Paulo 14404-600, Brazil
| | - Kátia Mara Oliveira
- Universidade Federal de São Carlos, Departamento de Química, Rodovia Washington Luis s/n Km 235, São Carlos, São Paulo 13565-905, Brazil
| | - Renato Pereira Orenha
- Universidade de Franca, Avenida Dr. Armando Salles Oliveira, 201 - Parque Universitário, Franca, São Paulo 14404-600, Brazil
| | - Renato Luís Tame Parreira
- Universidade de Franca, Avenida Dr. Armando Salles Oliveira, 201 - Parque Universitário, Franca, São Paulo 14404-600, Brazil
| | - Alzir Azevedo Batista
- Universidade Federal de São Carlos, Departamento de Química, Rodovia Washington Luis s/n Km 235, São Carlos, São Paulo 13565-905, Brazil
| | - Denise Crispim Tavares
- Universidade de Franca, Avenida Dr. Armando Salles Oliveira, 201 - Parque Universitário, Franca, São Paulo 14404-600, Brazil.
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Guimarães IDL, Marszaukowski F, Ribeiro R, de Lazaro SR, de Oliveira KM, Batista AA, Castellen P, Wrobel E, Garcia JR, Boeré RT, Wohnrath K. Synthesis and characterization of η6-p-cymene ruthenium(II) complexes containing alkyl- and methoxy-substituted triarylphosphines. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2020.121599] [Citation(s) in RCA: 3] [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: 02/07/2023]
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Faria RS, Silva HD, Mello-Andrade F, Pires WC, de Castro Pereira F, de Lima AP, de Fátima Oliveira Santos S, Teixeira TM, da Silva PFF, Naves PLF, Batista AA, da Silva Oliveira RJ, Reis RM, de Paula Silveira-Lacerda E. Ruthenium(II)/Benzonitrile Complex Induces Cytotoxic Effect in Sarcoma-180 Cells by Caspase-Mediated and Tp53/p21-Mediated Apoptosis, with Moderate Brine Shrimp Toxicity. Biol Trace Elem Res 2020; 198:669-680. [PMID: 32266641 DOI: 10.1007/s12011-020-02098-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Accepted: 02/26/2020] [Indexed: 12/12/2022]
Abstract
Ruthenium(II)/benzonitrile complexes have demonstrated promising anticancer properties. Considering that there are no specific therapies for treating sarcoma, we decided to evaluate the cytotoxic, genotoxic, and lethal effects of cis-[RuCl(BzCN)(phen)(dppb)]PF6 (BzCN = benzonitrile; phen = 1,10-phenanthroline; dppb = 1,4-bis-(diphenylphosphino)butane), as well as the mechanism of cell death induction that occurs against murine sarcoma-180 tumor. Thus, MTT assay was applied to assess the ruthenium cytotoxicity, showing that the compound is a more potent inhibitor for the sarcoma-180 tumor cell viability than normal cells (lymphocytes). The comet assay indicated low genotoxic for normal cells. cis-[RuCl(BzCN)(phen)(dppb)]PF6 also showed moderate lethality in Artemia salina. The complex induced cell cycle arrest in the G0/G1 phase in sarcoma-180 cells. In addition, the complex caused S180 cells to die by apoptosis by an increase in Annexin-V-positive cells and morphological changes typical of apoptotic cells. Additionally, cis-[RuCl(BzCN)(phen)(dppb)]PF6 increased the gene expression of Bax, Casp3, and Tp53 in S180 cells. By using a western blot, we observed an increased protein level of TNF-R2, Bax, and p21. In conclusion, cis-[RuCl(BzCN)(phen)(dppb)]PF6 is active and selective for sarcoma-180 cells, leading to cell cycle arrest at the G0/G1 and cell death through a caspases-mediated and Tp53/p21-mediated pathway.
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Affiliation(s)
- Raquel Santos Faria
- Department of Genetics, Laboratory of Molecular Genetics and Cytogenetics, Institute of Biological Sciences, Federal University of Goiás, Avenida Esperança, s/n, Campus Samambaia (Campus II), Cx. Postal 131, Goiania, GO, 74690-900, Brazil
| | - Hugo Delleon Silva
- Department of Genetics, Laboratory of Molecular Genetics and Cytogenetics, Institute of Biological Sciences, Federal University of Goiás, Avenida Esperança, s/n, Campus Samambaia (Campus II), Cx. Postal 131, Goiania, GO, 74690-900, Brazil
- Uni-Anhanguera University Center of Goias, Goiania, Goiás, 74423-115, Brazil
| | - Francyelli Mello-Andrade
- Department of Genetics, Laboratory of Molecular Genetics and Cytogenetics, Institute of Biological Sciences, Federal University of Goiás, Avenida Esperança, s/n, Campus Samambaia (Campus II), Cx. Postal 131, Goiania, GO, 74690-900, Brazil
- Department of Chemistry, Federal Institute of Education, Science and Technology of Goiás, Goiania, Goiás, 74055-110, Brazil
| | - Wanessa Carvalho Pires
- Department of Genetics, Laboratory of Molecular Genetics and Cytogenetics, Institute of Biological Sciences, Federal University of Goiás, Avenida Esperança, s/n, Campus Samambaia (Campus II), Cx. Postal 131, Goiania, GO, 74690-900, Brazil
| | - Flávia de Castro Pereira
- Department of Genetics, Laboratory of Molecular Genetics and Cytogenetics, Institute of Biological Sciences, Federal University of Goiás, Avenida Esperança, s/n, Campus Samambaia (Campus II), Cx. Postal 131, Goiania, GO, 74690-900, Brazil
| | - Aliny Pereira de Lima
- Department of Genetics, Laboratory of Molecular Genetics and Cytogenetics, Institute of Biological Sciences, Federal University of Goiás, Avenida Esperança, s/n, Campus Samambaia (Campus II), Cx. Postal 131, Goiania, GO, 74690-900, Brazil
- Faculty of Brazil Institute (FIBRA), Anapolis, Goiás, 75133-050, Brazil
| | - Sônia de Fátima Oliveira Santos
- Department of Genetics, Laboratory of Molecular Genetics and Cytogenetics, Institute of Biological Sciences, Federal University of Goiás, Avenida Esperança, s/n, Campus Samambaia (Campus II), Cx. Postal 131, Goiania, GO, 74690-900, Brazil
| | - Thallita Monteiro Teixeira
- Department of Genetics, Laboratory of Molecular Genetics and Cytogenetics, Institute of Biological Sciences, Federal University of Goiás, Avenida Esperança, s/n, Campus Samambaia (Campus II), Cx. Postal 131, Goiania, GO, 74690-900, Brazil
| | - Paula Francinete Faustino da Silva
- Department of Genetics, Laboratory of Molecular Genetics and Cytogenetics, Institute of Biological Sciences, Federal University of Goiás, Avenida Esperança, s/n, Campus Samambaia (Campus II), Cx. Postal 131, Goiania, GO, 74690-900, Brazil
| | | | - Alzir Azevedo Batista
- Department of Chemistry, Federal University of São Carlos, Sao Carlos, São Paulo, 13565-905, Brazil
| | | | - Rui Manuel Reis
- Molecular Oncology Research Center, Barretos Cancer Hospital, Barretos, São Paulo, 14784-400, Brazil
| | - Elisângela de Paula Silveira-Lacerda
- Department of Genetics, Laboratory of Molecular Genetics and Cytogenetics, Institute of Biological Sciences, Federal University of Goiás, Avenida Esperança, s/n, Campus Samambaia (Campus II), Cx. Postal 131, Goiania, GO, 74690-900, Brazil.
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10
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Higuera-Padilla AR, Kock FVC, Batista AA, Colnago LA. A straightforward catalytic approach to obtain deuterated chloroform at room temperature. Magn Reson Chem 2020; 58:917-920. [PMID: 32562503 DOI: 10.1002/mrc.5066] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 06/09/2020] [Accepted: 06/12/2020] [Indexed: 06/11/2023]
Abstract
We report the catalytic activity for the complexes-cis-[RuCl2 (dppb)(bipy)] (A), and [η6 -(p-cymene)Ru (dppb)Cl]PF6 (B), wherein dppb = 1,4-bis(diphenylphosphine)butane, and bipy = 2,2'-bipyridine-for the synthesis of CDCl3 from CHCl3 using D2 O as deuterium source. H/D exchange reactions were performed using a chloroform/D2 O, 1:2 molar ratio, vigorously stirred, at room temperature. One mole of KOH was dissolved in D2 O fraction and catalytic complexes from 0.002 to 0.05 mmol were dissolved in chloroform. The H/D exchange reactions were monitored using 13 C nuclear magnetic resonance sequences without proton decoupling. The reaction using 0.01 mmol of compound A reached approximately 55% of H/D conversion in 1 h. In the same time, the reactions with 0.002 mmol of compound A and without catalyst show approximately 28% and 3% H/D exchange, respectively. Without the catalysts, the H/D exchange was only 12.0% in 5 h. For compound B, 55% H/D conversion was observed in 1 h, only when 0.05 mmol was used, which is much higher catalyst concentration. After the isolation of the chloroform fraction and two more addition of D2 O, it was possible to obtain 95.0% H/D exchange in approximately 3 h, using 0.01 mmol of the compound A. Therefore, compound A is an efficient catalyst for a rapid and straightforward synthesis of CDCl3 from CHCl3 at room temperature and using D2 O as deuterium source.
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11
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Lopes JMS, Reis JRT, Machado AEH, Leite THO, Batista AA, Acunha TV, Iglesias BA, Araujo PT, Barbosa Neto NM. Influence of the meso-substituents on the spectral features of free-base porphyrin. Spectrochim Acta A Mol Biomol Spectrosc 2020; 238:118389. [PMID: 32417643 DOI: 10.1016/j.saa.2020.118389] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Revised: 04/14/2020] [Accepted: 04/18/2020] [Indexed: 06/11/2023]
Abstract
The role of meso-substituents on the spectral features of free-base porphyrins is explored. Meso-tetra(4-pyridyl)porphyrin is compared with meso-tetra(2-thienyl)porphyrin and meso-tetra(pentafluorophenyl)porphyrin. Our results indicate that some of the asymmetric Q-bands in the free-base porphyrin tend to become symmetric relative to the adopted meso-substituent. The results show that the outlying perturbations lead the free-base quasi-degenerated Qx1, Qx2, Qy1, and Qy2 bands to be closer in energy. Combined, absorption, fluorescence and Raman spectroscopies endorse our conclusions showing that both the frequencies and the Huang-Rhys factors associated with every vibronic progression are noticeably affected by the investigated meso-substituents. Our results confirm that the B-band is also multi-featured in agreement with what is found for the Q-bands.
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Affiliation(s)
- J M S Lopes
- Institute of Natural Sciences, Graduate Program in Physics, Federal University of Pará, Belém, PA, Brazil.
| | - J R T Reis
- Institute of Natural Sciences, Graduate Program in Physics, Federal University of Pará, Belém, PA, Brazil
| | - A E H Machado
- Institute of Chemistry, Federal University of Uberlândia, Uberlândia, MG, Brazil; Federal University of Catalão, Av. Lamartine Pinto de Avelar, 1120, CEP 75704-020, Catalão, GO, Brazil
| | - T H O Leite
- Department of Chemistry, Federal University of São Carlos, São Carlos, SP, Brazil
| | - A A Batista
- Department of Chemistry, Federal University of São Carlos, São Carlos, SP, Brazil
| | - T V Acunha
- Bioinorganic and Porphyrinoid Materials Laboratory, Department of Chemistry, Federal University of Santa Maria, Santa Maria, RS, Brazil
| | - B A Iglesias
- Bioinorganic and Porphyrinoid Materials Laboratory, Department of Chemistry, Federal University of Santa Maria, Santa Maria, RS, Brazil
| | - P T Araujo
- Institute of Natural Sciences, Graduate Program in Physics, Federal University of Pará, Belém, PA, Brazil; Department of Physics and Astronomy, University of Alabama, Tuscaloosa, AL, United States.
| | - N M Barbosa Neto
- Institute of Natural Sciences, Graduate Program in Physics, Federal University of Pará, Belém, PA, Brazil.
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12
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de Lima AP, Almeida MAP, Mello-Andrade F, de Castro Pereira F, Pires WC, Abreu DC, de Souza Velozo-Sá V, Batista AA, de Paula Silveira-Lacerda E. Ru(II)-Based Amino Acid Complexes Show Promise for Leukemia Treatment: Cytotoxicity and Some Light on their Mechanism of Action. Biol Trace Elem Res 2020; 197:123-131. [PMID: 31773484 DOI: 10.1007/s12011-019-01976-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Accepted: 11/01/2019] [Indexed: 12/20/2022]
Abstract
Ruthenium is attracting considerable interest as the basis for new compounds to treat diseases, and studies have shown that complexes with different structures have significant antineoplastic and antimetastatic potential against several types of tumors, including tumors resistant to cisplatin drugs. We examined the cytotoxic, genotoxic, and pro-apoptotic activities of six ruthenium complexes containing amino acid with general formulation [Ru(AA)(bipy)(dppb)]PF6, where AA = amino acid (alanine, glycine, leucine, lysine, methionine, or tryptophan); bipy = 2,2´-bipyridine; and dppb = [1,4-bis(diphenylphosphine)butane], against A549 (lung carcinoma) and K562 (chronic myelogenous leukemia) cancer cells. The results show that the ruthenium complexes tested were able to induce cytotoxicity in A549 and K562 cancer cells. Complex 1 containing alanine inhibited the cell viability of A549 and K562 tumor cells by inducing apoptosis, as evidenced by an increased number of Annexin V-positive cells and the induction of DNA damage and cell cycle arrest. Complex 1 was able to induce caspase-mediated apoptosis in K562 cells through the mitochondrial dysfunction, the upregulation of apoptotic genes, and the downregulation of Bcl2 anti-apoptotic gene. Besides being cytotoxic to K562 and A549 cells, ruthenium complex containing alanine shows low cytotoxicity and genotoxicity against non-tumor cells. These results suggest that the ruthenium (II) complex is a potential safe and efficient antineoplastic candidate for leukemia treatment.
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Affiliation(s)
- Aliny Pereira de Lima
- Department of Genetics, Laboratory of Molecular Genetics and Cytogenetics, Institute of Biological Sciences, Federal University of Goiás, Goiânia, Goiás, 74690-900, Brazil
- Faculty of Brazil Institute (FIBRA), Anápolis, Goiás, 75133-050, Brazil
| | | | - Francyelli Mello-Andrade
- Department of Genetics, Laboratory of Molecular Genetics and Cytogenetics, Institute of Biological Sciences, Federal University of Goiás, Goiânia, Goiás, 74690-900, Brazil
- Department of Chemistry, Federal Institute of Education, Science and Technology of Goiás, Goiânia, Goiás, 74055-110, Brazil
| | - Flávia de Castro Pereira
- Department of Genetics, Laboratory of Molecular Genetics and Cytogenetics, Institute of Biological Sciences, Federal University of Goiás, Goiânia, Goiás, 74690-900, Brazil
| | - Wanessa Carvalho Pires
- Department of Genetics, Laboratory of Molecular Genetics and Cytogenetics, Institute of Biological Sciences, Federal University of Goiás, Goiânia, Goiás, 74690-900, Brazil
| | - Davi Carvalho Abreu
- Department of Genetics, Laboratory of Molecular Genetics and Cytogenetics, Institute of Biological Sciences, Federal University of Goiás, Goiânia, Goiás, 74690-900, Brazil
| | - Vivianne de Souza Velozo-Sá
- Department of Genetics, Laboratory of Molecular Genetics and Cytogenetics, Institute of Biological Sciences, Federal University of Goiás, Goiânia, Goiás, 74690-900, Brazil
| | - Alzir Azevedo Batista
- Department of Chemistry, Federal University of São Carlos, São Carlos, São Paulo, 13565-905, Brazil
| | - Elisângela de Paula Silveira-Lacerda
- Department of Genetics, Laboratory of Molecular Genetics and Cytogenetics, Institute of Biological Sciences, Federal University of Goiás, Goiânia, Goiás, 74690-900, Brazil.
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13
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Lopes JMS, Costa SN, Batista AA, Dinelli LR, Araujo PT, Neto NMB. Photophysics and visible light photodissociation of supramolecular meso-tetra(4-pyridyl) porphyrin/RuCl 2(CO)(PPh 3) 2 structures. Spectrochim Acta A Mol Biomol Spectrosc 2020; 237:118351. [PMID: 32361521 DOI: 10.1016/j.saa.2020.118351] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2019] [Revised: 03/14/2020] [Accepted: 04/06/2020] [Indexed: 06/11/2023]
Abstract
In the last decades, supramolecular structures have been explored in many technological efforts. One example of such supramolecules is attained when ruthenium complexes are attached in the outer sites of a porphyrin. Ruthenium complexes act as modulators of the photophysical processes of macrocyclic molecules. Besides the investigation of the main changes introduced by the ruthenium complexes in the electronic and vibronic properties, and in the excited state deactivation processes of porphyrins, discussions concerning the photostability of these supramolecules are much needed. Here, we investigate the supramolecular free-base meso-tetra(4-pyridyl) porphyrin decorated with "RuCl2(CO)(PPh3)2" ruthenium species linked at each of its (4-pyridyl) moieties. The modifications in the photophysical processes introduced by the metallic outlying species are discussed and our results suggest an energy transfer process from the porphyrin B-band to the ruthenium complex MLCT-band. The demonstration of visible light photodissociation of the supramolecule, via both pulsed and continuous laser, is also addressed.
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Affiliation(s)
- J M S Lopes
- Institute of Natural Sciences, Graduate Program in Physics, Federal University of Pará, Belém, PA, Brazil.
| | - S N Costa
- Institute of Natural Sciences, Graduate Program in Physics, Federal University of Pará, Belém, PA, Brazil
| | - A A Batista
- Department of Chemistry, Federal University of São Carlos, São Carlos, SP, Brazil
| | - L R Dinelli
- College of Sciences of Pontal, Federal University of Uberlândia, Ituiutaba, MG, Brazil
| | - P T Araujo
- Institute of Natural Sciences, Graduate Program in Physics, Federal University of Pará, Belém, PA, Brazil; Department of Physics and Astronomy, University of Alabama, Tuscaloosa, AL, United States.
| | - N M Barbosa Neto
- Institute of Natural Sciences, Graduate Program in Physics, Federal University of Pará, Belém, PA, Brazil.
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14
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Lopes JMS, Sampaio RN, Dinelli LR, Batista AA, Araujo PT, Neto NMB. On the excitation dependence of fluorescence spectra of meso-tetrapyridyl zinc (II) porphyrin and its relation with hydrogen bonding and outlying decoration. Spectrochim Acta A Mol Biomol Spectrosc 2020; 224:117371. [PMID: 31344576 DOI: 10.1016/j.saa.2019.117371] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 07/01/2019] [Accepted: 07/07/2019] [Indexed: 06/10/2023]
Abstract
Zinc porphyrins are potential candidates for boosting the advancement of various technological applications, including those exploring the molecule's radiative emissions. In this work, the excitation dependence of fluorescence spectra from 5,10,15,20-meso-tetrapyridyl zinc(II) porphyrin dissolved in a binary solvent mixture of CHCl3: MeOH, is reported. Important modifications in the profiles of the fluorescence bands are observed after exciting the molecules in a broad wavelength range from 350 to 565 nm. We attribute such modifications to the existence of two distinct relaxation pathways, related to two quasi-degenerated potential energy surfaces (PES) in the ZnTPyP's first excited state whose population rates changes for different excitation wavelengths. We also observed that by changing the CHCl3:MeOH proportion in the binary mixture, a quenching mechanism mediated by the MeOH hydrogen bondings and ZnTPyP takes place, which allows for tuning the excitation dependence of the aforementioned relaxations pathways. Moreover, our data confirm that the addition of outlying RuCl(dppb)(bipy) ruthenium complex linked to the pyridyl moieties of the ZnTPyP ring is also an excellent strategy to modify the excitation dependence of the fluorescence relaxation pathways.
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Affiliation(s)
- J M S Lopes
- Institute of Natural Sciences, Graduate Program in Physics, Federal University of Pará, Belém, PA, Brazil.
| | - R N Sampaio
- Department of Chemistry, The University of North Carolina at Chapel Hill, Murray Hall, Chapel Hill, NC, United States
| | - L R Dinelli
- College of Sciences of Pontal, Federal University of Uberlândia, Ituiutaba, MG, Brazil
| | - A A Batista
- Department of Chemistry, Federal University of São Carlos, São Carlos, SP, Brazil
| | - P T Araujo
- Institute of Natural Sciences, Graduate Program in Physics, Federal University of Pará, Belém, PA, Brazil; Department of Physics and Astronomy, University of Alabama, Tuscaloosa, AL, United States; Center of Materials for Information Technology (MINT Center) University of Alabama, Tuscaloosa, AL, United States.
| | - N M Barbosa Neto
- Institute of Natural Sciences, Graduate Program in Physics, Federal University of Pará, Belém, PA, Brazil.
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15
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Machado dos Santos F, Edivirges Alvarenga M, Valdo AKSM, Rabelo R, Cangussu de Castro Gomes D, de Fátima Â, Vinicius Costa Lara T, da Silva CM, Tasso TT, Neto JHA, Batista AA, Ayala AP, Ellena JA, Ferraz Guimarães V, Maria Alves Oliveira C, da Silva LC, Gontijo Vaz B, Terra Martins F. A giant hybrid organic–inorganic octahedron from a narrow rim carboxylate calixarene. Chem Commun (Camb) 2020; 56:15024-15027. [DOI: 10.1039/d0cc07043b] [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: 11/21/2022]
Abstract
Here we discovered an unprecedented giant octahedral coordination compound bearing 16 Zn2+, 12 Na+, 8 O2−, 4 OH−, 13 H2O and 6 L4− ligands [L4− = fully deprotonated tetra(carboxymethoxy)calix[4]arene].
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Affiliation(s)
| | | | | | - Renato Rabelo
- Institute of Molecular Science (ICMol)
- University of Valencia
- Paterna 46980
- Spain
| | | | - Ângelo de Fátima
- Department of Chemistry
- Federal University of Minas Gerais
- Belo Horizonte
- Brazil
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16
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da Silva PB, de Freitas ES, Solcia MC, de Souza PC, da Silva MM, Batista AA, Eismann CE, Rolisola AMCM, Menegário AA, Cardoso RF, Chorilli M, Pavan FR. Corrigendum: A Nanostructured Lipid System to Improve the Oral Bioavailability of Ruthenium(II) Complexes for the Treatment of Infections Caused by Mycobacterium tuberculosis. Front Microbiol 2019; 10:2517. [PMID: 31736932 PMCID: PMC6848849 DOI: 10.3389/fmicb.2019.02517] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Accepted: 10/18/2019] [Indexed: 11/13/2022] Open
Abstract
[This corrects the article DOI: 10.3389/fmicb.2018.02930.].
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Affiliation(s)
- Patricia B da Silva
- School of Pharmaceutical Sciences, Universidade Estadual Paulista, Araraquara, Brazil
| | | | | | | | | | | | - Carlos E Eismann
- Environmental Studies Center, Universidade Estadual Paulista, Rio Claro, Brazil
| | | | - Amauri A Menegário
- Environmental Studies Center, Universidade Estadual Paulista, Rio Claro, Brazil
| | | | - Marlus Chorilli
- School of Pharmaceutical Sciences, Universidade Estadual Paulista, Araraquara, Brazil
| | - Fernando R Pavan
- School of Pharmaceutical Sciences, Universidade Estadual Paulista, Araraquara, Brazil
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17
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Kock FVC, Costa AR, de Oliveira KM, Batista AA, Ferreira AG, Venâncio T. A Supramolecular Interaction of a Ruthenium Complex With Calf-Thymus DNA: A Ligand Binding Approach by NMR Spectroscopy. Front Chem 2019; 7:762. [PMID: 31781544 PMCID: PMC6857657 DOI: 10.3389/fchem.2019.00762] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Accepted: 10/23/2019] [Indexed: 12/29/2022] Open
Abstract
Lawsone itself exhibits interesting biological activities, and its complexation with a metal center can improve the potency. In this context a cytotoxic Ru-complex, [Ru(law)(dppb)(bipy)] (law = lawsone, dppb = 1,4-bis(diphenylphosphino)butane and bipy = 2,2'-bipyridine), named as CBLAU, was prepared as reported. In this work, NMR binding-target studies were performed to bring to light the most accessible interaction sites of this Ru-complex toward Calf-Thymus DNA (CT-DNA, used as a model), in a similar approach used for other metallic complexes with anti-cancer activity, such as cisplatin and carboplatin. Advanced and robust NMR binding-target studies, among them Saturation Transfer Difference (STD)-NMR and longitudinal relaxometry (T1), were explored. The 1H and 31P -NMR data indicate that the structure of Ru-complex remains preserved in the presence of CT-DNA, and some linewidth broadening is also observed for all the signals, pointing out some interaction. Looking at the binding efficiency, the T1 values are highly influenced by the formation of the CBLAU-DNA adduct, decreasing from 11.4 s (without DNA) to 1.4 s (with DNA), where the difference is bigger for the lawsone protons. Besides, the STD-NMR titration experiments revealed a stronger interaction (KD = 5.9 mM) for CBLAU-DNA in comparison to non-complexed lawsone-DNA (KD = 34.0 mM). The epitope map, obtained by STD-NMR, shows that aromatic protons from the complexed lawsone exhibits higher saturation transfer, in comparison to other Ru-ligands (DPPB and bipy), suggesting the supramolecular contact with CT-DNA takes place by the lawsone face of the Ru-complex, possibly by a spatial π-π stacking involving π-bonds on nucleic acids segments of the DNA chain and the naphthoquinone group.
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Affiliation(s)
| | - Analu Rocha Costa
- Laboratory of Structure and Reactivity of Inorganic Compounds, Department of Chemistry, Federal University of São Carlos, São Carlos, Brazil
| | - Katia Mara de Oliveira
- Laboratory of Structure and Reactivity of Inorganic Compounds, Department of Chemistry, Federal University of São Carlos, São Carlos, Brazil
| | - Alzir Azevedo Batista
- Laboratory of Structure and Reactivity of Inorganic Compounds, Department of Chemistry, Federal University of São Carlos, São Carlos, Brazil
| | - Antônio Gilberto Ferreira
- Laboratory of Nuclear Magnetic Resonance, Department of Chemistry, Federal University of São Carlos, São Carlos, Brazil
| | - Tiago Venâncio
- Laboratory of Nuclear Magnetic Resonance, Department of Chemistry, Federal University of São Carlos, São Carlos, Brazil
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18
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de Sousa IH, Campos VNS, Vale AAM, Maciel-Silva VL, Leite CM, Lopes AJO, Mourão PS, das Chagas Alves Lima F, Batista AA, de Azevedo Dos Santos APS, Almeida MAP, Pereira SRF. Ruthenium (II) complexes with N, O-chelating proline and threonine ligands cause selective cytotoxicity by the induction of genomic instability, cell cycle arrest and apoptosis in breast and prostate tumor cells. Toxicol In Vitro 2019; 62:104679. [PMID: 31676337 DOI: 10.1016/j.tiv.2019.104679] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 09/20/2019] [Accepted: 10/05/2019] [Indexed: 12/27/2022]
Abstract
Ruthenium complexes are being considered as novel chemotherapeutic alternatives for cancer treatment. In our study, we assessed the antitumoral activities of novel ruthenium complexes coupled to the amino acids proline (RuPro) and threonine (RuThr) in prostate tumor cell lines (DU145) and breast (MCF7), and normal cell lines of the lung fibroblast (GM07492A). Our results revealed that the EC50 of the complexes for DU145 and MCF7 was two times lower than that GM07492A. Moreover, RuPro and RuThr were not able to induce significant genomic instability, cell cycle arrest or cell death in GM07492A, but could induce DNA damage, arrest in G2/M and apoptosis in DU145 and MCF7. Furthermore, BAX, TP53 and ATM were found to be upregulated in DU145 and MCF7 treated with RuPro and RuThr, in which, a higher ASCT2 gene expression was also observed. Using molecular docking, RuPro and RuThr interact with ASCT2, suggesting that this transporter might have a pivotal role in the execution of their activities. Hence, our results with RuPro and RuThr are capable of selectively inducing genetic damage, cell cycle arrest and apoptosis in DU145 and MCF7. We suggest that the selective action of the RuPro and RuThr complexes is related to the higher expression of ASCT2 in the tumor cells.
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Affiliation(s)
- Israel Higino de Sousa
- Postgraduate Program in Biodiversity and Biotechnology-BIONORTE, Federal University of Maranhão, Dom Delgado University City, 1966, CEP. 65085-580, São Luís, MA, Brazil; Laboratory of Genetics and Molecular Biology, Department of Biology, Federal University of Maranhão, Brazil.
| | | | - André Alvares Marques Vale
- Postgraduate Program in Health Sciences, Federal University of Maranhão, Brazil; Laboratory of Immunology applied to Cancer, Department of Physiological Sciences, Federal University of Maranhão, Brazil
| | - Vera Lucia Maciel-Silva
- Postgraduate Program in Biodiversity and Biotechnology-BIONORTE, Federal University of Maranhão, Dom Delgado University City, 1966, CEP. 65085-580, São Luís, MA, Brazil; Laboratory of Genetics and Molecular Biology, Department of Biology, Federal University of Maranhão, Brazil; Department of Chemistry and Biology, State University of Maranhão, Paul VI campus, CEP 65055970, São Luis, MA, Brazil
| | - Celisnolia Moraes Leite
- Department of Chemistry, Federal University of São Carlos, CP 676, CEP 13565-905, São Carlos, SP, Brazil
| | - Alberto Jorge Oliveira Lopes
- Postgraduate Program in Health Sciences, Federal University of Maranhão, Brazil; Research Group in Computational Quantum Chemistry & Pharmaceutical Planning, State University of Piauí, GPQQ&PF/UESPI, Teresina, PI, Brazil
| | - Penina Sousa Mourão
- Research Group in Computational Quantum Chemistry & Pharmaceutical Planning, State University of Piauí, GPQQ&PF/UESPI, Teresina, PI, Brazil
| | - Francisco das Chagas Alves Lima
- Research Group in Computational Quantum Chemistry & Pharmaceutical Planning, State University of Piauí, GPQQ&PF/UESPI, Teresina, PI, Brazil
| | - Alzir Azevedo Batista
- Department of Chemistry, Federal University of São Carlos, CP 676, CEP 13565-905, São Carlos, SP, Brazil
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19
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da Silva PB, de Freitas ES, Solcia MC, de Souza PC, da Silva MM, Batista AA, Eismann CE, Rolisola AMCM, Menegário AA, Cardoso RF, Chorilli M, Pavan FR. Corrigendum: A Nanostructured Lipid System to Improve the Oral Bioavailability of Ruthenium(II) Complexes for the Treatment of Infections Caused by Mycobacterium tuberculosis. Front Microbiol 2019; 10:1213. [PMID: 31214147 PMCID: PMC6555276 DOI: 10.3389/fmicb.2019.01213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Accepted: 05/14/2019] [Indexed: 12/02/2022] Open
Affiliation(s)
- Patricia B da Silva
- School of Pharmaceutical Sciences, Universidade Estadual Paulista, Araraquara, Brazil
| | | | | | | | | | | | - Carlos E Eismann
- Environmental Studies Center, Universidade Estadual Paulista, Rio Claro, Brazil
| | | | - Amauri A Menegário
- Environmental Studies Center, Universidade Estadual Paulista, Rio Claro, Brazil
| | | | - Marlus Chorilli
- School of Pharmaceutical Sciences, Universidade Estadual Paulista, Araraquara, Brazil
| | - Fernando R Pavan
- School of Pharmaceutical Sciences, Universidade Estadual Paulista, Araraquara, Brazil
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20
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Lopes JMS, Sampaio RN, Ito AS, Batista AA, Machado AEH, Araujo PT, Neto NMB. Evolution of electronic and vibronic transitions in metal(II) meso-tetra(4-pyridyl)porphyrins. Spectrochim Acta A Mol Biomol Spectrosc 2019; 215:327-333. [PMID: 30852279 DOI: 10.1016/j.saa.2019.02.024] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Revised: 01/18/2019] [Accepted: 02/10/2019] [Indexed: 06/09/2023]
Abstract
The changing of the electronic and vibronic states due to the insertion of Zn(II), Cu(II), Ni(II) or Co(II) ions in the meso-tetrakis(4-pyridyl)porphyrin ring center is investigated. The combination of absorption, photoluminescence, Raman and infrared spectroscopies with second-derivative-based spectral deconvolution analysis reveals that the structuration of both B- and Q-bands is very sensitive to the decorating ion. Similar to free base porphyrins, metal(II) meso-tetra(4-pyridyl)porphyrins also present their Q-band constituted of multiple electronic transitions, where the central ion plays an important role in the selection of vibration modes that mediate the vibronic transitions. Our novel results will expand and reinterpret current assignments for metal(II) meso-tetra(4-pyridyl)porphyrins vibrational modes available in the literature.
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Affiliation(s)
- J M S Lopes
- Instituto de Ciências Exatas e Naturais, Programa de Pos-Graduação em Fisica, Universidade Federal do Pará, Belém, PA, Brazil
| | - R N Sampaio
- Department of Chemistry, The University of North Carolina at Chapel Hill, Murray Hall, Chapel Hill, NC, United States
| | - A S Ito
- Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - A A Batista
- Departamento de Química, Universidade Federal de São Carlos, São Carlos, SP, Brazil
| | - A E H Machado
- Instituto de Química, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
| | - P T Araujo
- Instituto de Ciências Exatas e Naturais, Programa de Pos-Graduação em Fisica, Universidade Federal do Pará, Belém, PA, Brazil; Department of Physics and Astronomy, University of Alabama, Tuscaloosa, AL, United States; Center for Materials for Information Technology (MINT Center), University of Alabama, Tuscaloosa, AL, United States.
| | - N M Barbosa Neto
- Instituto de Ciências Exatas e Naturais, Programa de Pos-Graduação em Fisica, Universidade Federal do Pará, Belém, PA, Brazil.
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De Grandis RA, Santos PWDSD, Oliveira KMD, Machado ART, Aissa AF, Batista AA, Antunes LMG, Pavan FR. Novel lawsone-containing ruthenium(II) complexes: Synthesis, characterization and anticancer activity on 2D and 3D spheroid models of prostate cancer cells. Bioorg Chem 2019; 85:455-468. [DOI: 10.1016/j.bioorg.2019.02.010] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Revised: 01/29/2019] [Accepted: 02/03/2019] [Indexed: 12/19/2022]
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Lopes JMS, Sharma K, Sampaio RN, Batista AA, Ito AS, Machado AEH, Araújo PT, Barbosa Neto NM. Novel insights on the vibronic transitions in free base meso-tetrapyridyl porphyrin. Spectrochim Acta A Mol Biomol Spectrosc 2019; 209:274-279. [PMID: 30414576 DOI: 10.1016/j.saa.2018.10.054] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2018] [Revised: 10/23/2018] [Accepted: 10/28/2018] [Indexed: 06/09/2023]
Abstract
We present novel results on the free base 5,10,15,20-meso-tetra(pyridyl)-21H,23H-porphyrin (H2TPyP). This molecule presents complex electronic and vibrational properties and despite the vast literature reporting the transitions observed in its absorption and fluorescence spectra, a more accurate interpretation has been kept elusive. In particular, we show that the molecule's Q-band develops into many electronic and vibronic transitions, whose the well-known "four orbital model" finds it difficult to reconcile. Using distinct spectroscopy techniques, we conclude that both Qx- and Qy-bands comprise, in fact, two quasi-degenerated electronic states together with their respective vibronic progressions each. The analysis of the Huang-Rhys factors and complementary time- and polarization-resolved measurements reinforce the need for the proposed Q-band multi features remodeling.
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Affiliation(s)
- J M S Lopes
- Institute of Natural Sciences, Graduate Program in Physics, Federal University of Pará, Belém, PA, Brazil.
| | - K Sharma
- Department of Physics and Astronomy, University of Alabama, Tuscaloosa, AL, United States; Center of Materials for Information Technology (MINT Center) University of Alabama, Tuscaloosa, AL, United States
| | - R N Sampaio
- Department of Chemistry, The University of North Carolina at Chapel Hill, Murray Hall, Chapel Hill, NC, United States
| | - A A Batista
- Department of Chemistry, Federal University of São Carlos, São Carlos, SP, Brazil
| | - A S Ito
- College of Philosophy, Sciences, and Letters of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - A E H Machado
- Institute of Chemistry, Federal University of Uberlândia, Uberlândia, MG, Brazil; Special Academic Unit of Physics, Graduate Program in Exact and Technological Sciences, Federal University of Catalão, Catalão, Goiás, Brazil
| | - P T Araújo
- Institute of Natural Sciences, Graduate Program in Physics, Federal University of Pará, Belém, PA, Brazil; Department of Physics and Astronomy, University of Alabama, Tuscaloosa, AL, United States; Center of Materials for Information Technology (MINT Center) University of Alabama, Tuscaloosa, AL, United States.
| | - N M Barbosa Neto
- Institute of Natural Sciences, Graduate Program in Physics, Federal University of Pará, Belém, PA, Brazil.
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Colina-Vegas L, Lima Prado Godinho J, Coutinho T, Correa RS, de Souza W, Cola Fernandes Rodrigues J, Batista AA, Navarro M. Antiparasitic activity and ultrastructural alterations provoked by organoruthenium complexes against Leishmania amazonensis. NEW J CHEM 2019. [DOI: 10.1039/c8nj04657c] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
New organoruthenium complexes were synthetized, characterized and evaluated to inhibit the proliferation of the Leishmania amazonensis parasite.
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Affiliation(s)
- Legna Colina-Vegas
- Departamento de Química
- Universidade Federal de São Carlos
- São Carlos
- Brazil
| | - Joseane Lima Prado Godinho
- Instituto de Biofísica Carlos Chagas Filho
- Universidade Federal do Rio de Janeiro
- Rio de Janeiro
- Brazil
- Instituto Nacional de Ciência e Tecnologia de Biologia Estrutural e Bioimagem and Centro Nacional de Biologia Estrutural e Bioimagem-Cenabio
| | - Thallita Coutinho
- Instituto de Biofísica Carlos Chagas Filho
- Universidade Federal do Rio de Janeiro
- Rio de Janeiro
- Brazil
- Instituto Nacional de Ciência e Tecnologia de Biologia Estrutural e Bioimagem and Centro Nacional de Biologia Estrutural e Bioimagem-Cenabio
| | - Rodrigo S. Correa
- Departamento de Química, ICEB
- Universidade Federal de Ouro Preto
- Ouro Preto
- Brazil
| | - Wanderley de Souza
- Instituto de Biofísica Carlos Chagas Filho
- Universidade Federal do Rio de Janeiro
- Rio de Janeiro
- Brazil
- Instituto Nacional de Ciência e Tecnologia de Biologia Estrutural e Bioimagem and Centro Nacional de Biologia Estrutural e Bioimagem-Cenabio
| | - Juliany Cola Fernandes Rodrigues
- Instituto de Biofísica Carlos Chagas Filho
- Universidade Federal do Rio de Janeiro
- Rio de Janeiro
- Brazil
- Instituto Nacional de Ciência e Tecnologia de Biologia Estrutural e Bioimagem and Centro Nacional de Biologia Estrutural e Bioimagem-Cenabio
| | | | - Maribel Navarro
- Instituto Nacional de Metrologia
- Qualidade e Tecnologia
- INMETRO
- Xerem
- Brazil
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da Silva PB, de Freitas ES, Solcia MC, de Souza PC, da Silva MM, Batista AA, Eismann CE, Rolisola AMCM, Menegário AA, Cardoso RF, Chorilli M, Pavan FR. A Nanostructured Lipid System to Improve the Oral Bioavailability of Ruthenium(II) Complexes for the Treatment of Infections Caused by Mycobacterium tuberculosis. Front Microbiol 2018; 9:2930. [PMID: 30574128 PMCID: PMC6291527 DOI: 10.3389/fmicb.2018.02930] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Accepted: 11/14/2018] [Indexed: 01/28/2023] Open
Abstract
Tuberculosis (TB) is an infectious, airborne disease caused by the bacterium Mycobacterium tuberculosis that mainly affects the lungs. Fortunately, tuberculosis is a curable disease, and in recent years, death rates for this disease have decreased. However, the existence of antibiotic-resistant strains and the occurrence of co-infections with human immunodeficiency virus (HIV), have led to increased mortality in recent years. Another area of concern is that one-third of the world's population is currently infected with M. tuberculosis in its latent state, serving as a potential reservoir for active TB. In an effort to address the failure of current TB drugs, greater attention is being given to the importance of bioinorganic chemistry as an ally in new research into the development of anti-TB drugs. Ruthenium (Ru) is a chemical element that can mimic iron (Fe) in the body. In previous studies involving the following heteroleptic Ru complexes, [Ru(pic)(dppb)(bipy)]PF6 (SCAR1), [Ru(pic)(dppb)(Me-bipy)]PF6 (SCAR2), [Ru(pic)(dppb)(phen)]PF6 (SCAR4), cis-[Ru(pic)(dppe)2]PF6 (SCAR5), and [Ru(pic)(dppe)(phen)]PF6 (SCAR7), we observed excellent anti-TB activity, moderate cell-toxicity, and a lack of oral bioavailability in an in vivo model of these complexes. Therefore, the objective of this study was to evaluate the toxicity and oral bioavailability of these complexes by loading them into a nanostructured lipid system. The nanostructured lipid system was generated using different ratios of surfactant (soybean phosphatidylcholine, Eumulgin®, and sodium oleate), aqueous phase (phosphate buffer with a concentration of 1X and pH 7.4), and oil (cholesterol) to generate a system for the incorporation of Ru(II) compounds. The anti-TB activity of the compounds was determined using a microdilution assay with Resazurin (REMA) against strains of M. tuberculosis H37Rv and clinical isolates resistant. Cytotoxicity assay using J774.A1 cells (ATCC TIB-67) and intra-macrophage activity were performed. The oral bioavailability assay was used to analyze blood collected from female BALB/C mice. Plasma collected from the same mice was analyzed via inductively coupled plasma mass spectrometry (ICP-MS) to quantify the number of Ru ions. The complexes loaded into the nanostructured lipid system maintained in vitro activity and toxicity was found to be reduced compared with the compounds that were not loaded. The complexes showed intra-macrophagic activity and were orally bioavailable.
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Affiliation(s)
- Patricia B da Silva
- School of Pharmaceutical Sciences, Universidade Estadual Paulista, Araraquara, Brazil
| | | | | | | | | | | | - Carlos E Eismann
- Environmental Studies Center, Universidade Estadual Paulista, Rio Claro, Brazil
| | | | - Amauri A Menegário
- Environmental Studies Center, Universidade Estadual Paulista, Rio Claro, Brazil
| | | | - Marlus Chorilli
- School of Pharmaceutical Sciences, Universidade Estadual Paulista, Araraquara, Brazil
| | - Fernando R Pavan
- School of Pharmaceutical Sciences, Universidade Estadual Paulista, Araraquara, Brazil
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Dávila–Rodríguez M, Barolli JP, de Oliveira KM, Colina–Vegas L, da Silva Miranda F, Castellano EE, Von Poelhsitz G, Batista AA. Carbonyl–heterobimetallic Ru(II)/Fe(II)–complexes containing polypyridyl ligands: Synthesis, characterization, cellular viability assays and interactions with biomolecules. Arch Biochem Biophys 2018; 660:156-167. [DOI: 10.1016/j.abb.2018.10.020] [Citation(s) in RCA: 3] [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] [Received: 08/06/2018] [Revised: 10/25/2018] [Accepted: 10/30/2018] [Indexed: 12/18/2022]
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Mello-Andrade F, Cardoso CG, Silva CRE, Chen-Chen L, Melo-Reis PRD, Lima APD, Oliveira R, Ferraz IBM, Grisolia CK, Almeida MAP, Batista AA, Silveira-Lacerda EDP. Acute toxic effects of ruthenium (II)/amino acid/diphosphine complexes on Swiss mice and zebrafish embryos. Biomed Pharmacother 2018; 107:1082-1092. [PMID: 30257320 DOI: 10.1016/j.biopha.2018.08.051] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 07/20/2018] [Accepted: 08/10/2018] [Indexed: 11/25/2022] Open
Abstract
Anticancer potential of ruthenium complexes has been widely investigated, but safety evaluation studies are still scarce. Despite of ruthenium-based anticancer agents are known to cause fewer side effects compared to other metal-based drugs, these compounds are not fully free of toxicity, causing mainly nephrotoxicity. Based on the promising results from antitumor activity of the complexes [Ru(L-Met)(bipy)(dppb)]PF6 (RuMet) and [Ru(L-Trp)(bipy)(dppb)]PF6 (RuTrp), for the first time we investigated the toxicity profile of these complexes in rodent and zebrafish models. The acute oral toxicity was evaluated in Swiss mice. The mutagenic and genotoxic potential was determined by a combination of Micronucleus (MN) and Comet assay protocols, after exposure of Swiss mice to RuMet and RuTrp in therapeutic doses. Zebrafish embryos were exposed to these complexes, and their development observed up to 96 h post-fertilization. RuMet and RuTrp complexes showed low acute oral toxicity. Recorded behavioral changes were not recorded, nor were macroscopic morphological changes or structural modifications in the liver and kidneys. These complexes did not cause genetic toxicity, presenting a lack of micronuclei formation and low DNA damage induction in the cells from Swiss mice. In contradiction, cisplatin treatment exhibited high mutagenicity and genotoxicity. RuMet and RuTrp showed low toxicity in the embryo development of zebrafish. The RuMet and RuTrp complexes demonstrated low toxicity in the two study models, an interesting property in preclinical studies for novel anticancer agents.
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Affiliation(s)
- Francyelli Mello-Andrade
- Laboratory of Molecular Genetics and Cytogenetics, Institute of Biological Sciences, Federal University of Goiás, Goiânia, GO, 74690-900, Brazil
| | - Cléver Gomes Cardoso
- Department of Morphology, Institute of Biological Sciences, Federal University of Goiás, Goiânia, GO, 74690-900, Brazil
| | - Carolina Ribeiro E Silva
- Laboratory of Radiobiology and Mutagenesis, Institute of Biological Sciences, Federal University of Goiás, Goiânia, GO,74690-900, Brazil
| | - Lee Chen-Chen
- Laboratory of Radiobiology and Mutagenesis, Institute of Biological Sciences, Federal University of Goiás, Goiânia, GO,74690-900, Brazil
| | - Paulo Roberto de Melo-Reis
- Laboratory of Experimental and Biotechnological Research, Master's Program in Environmental Sciences and Health of School of Medical Sciences, Pharmaceutical and Biomedical, Laboratory, Pontifical Catholic University of Goiás, Goiânia, GO, 74605-010, Brazil
| | - Aliny Pereira de Lima
- Laboratory of Molecular Genetics and Cytogenetics, Institute of Biological Sciences, Federal University of Goiás, Goiânia, GO, 74690-900, Brazil
| | - Rhaul Oliveira
- Laboratory of Toxicological Genetics, Department of Genetics and Morphology, Institute of Biological Sciences, University of Brasilia, Brasília, DF, 70910-900, Brazil
| | - Irvin Bryan Machado Ferraz
- Laboratory of Toxicological Genetics, Department of Genetics and Morphology, Institute of Biological Sciences, University of Brasilia, Brasília, DF, 70910-900, Brazil
| | - Cesar Koppe Grisolia
- Laboratory of Toxicological Genetics, Department of Genetics and Morphology, Institute of Biological Sciences, University of Brasilia, Brasília, DF, 70910-900, Brazil
| | | | - Alzir Azevedo Batista
- Department of Chemistry, Federal University of São Carlos, São Carlos, SP, 13565-905, Brazil
| | - Elisângela de Paula Silveira-Lacerda
- Laboratory of Molecular Genetics and Cytogenetics, Institute of Biological Sciences, Federal University of Goiás, Goiânia, GO, 74690-900, Brazil.
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Popolin CP, Becceneri AB, Graminha AE, Batista AA, Cominetti MR. Abstract A71: Evaluation of ruthenium complex [Ru(AmSal)(dppe)2]PF6 on the proliferation, morphology, and migration of triple-negative MDA-MB-231 breast tumor cells. Mol Cancer Res 2018. [DOI: 10.1158/1557-3125.advbc17-a71] [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: 11/16/2022]
Abstract
Abstract
Breast cancer is the most prevalent type of cancer in women and the second leading cause of cancer death worldwide. Triple-negative breast cancer (TNBC) is a highly aggressive breast cancer subtype responsible for 10-20% of breast cancers. The limited efficacy of current systemic and targeted therapies against TNBC metastatic breast tumor metastases leads the search for new types of treatments. The development of antitumor metal-based drugs was started with the discovery of cisplatin; however, its side effects represent a limitation for clinical use. The ruthenium (Ru) molecule has some unique properties that justify its use as candidates for antitumor compounds, such as its ability to mimic iron for binding several biomolecules, including transferrin. The aim of this study was to evaluate the effects of the complex [Ru(AmSal)(dppe)2]PF6 on the proliferation, morphology, and migration of TNBC MDA-MB-231. For the proliferation assay, cells (1x104/100µL) were plated on 96-well plates for 24h. The culture medium was removed from the wells and fresh medium containing [Ru(AmSal)(dppe)2]PF6 (0,36 - 100µM) was added to the wells and incubated properly for 24h. After incubation, the culture medium of each well was removed and a solution containing MTT (1mg/mL) was added (100µL/well). The absorbance was read on an ELISA plate reader (540nm). For cell morphology MDA-MB-231 cells (1x105/mL) were seeded on 12-well plates for 24h. Cells were allowed to grow overnight and then treated or not (control) with the complex (0.15 9.6 µM) for 24h. Cell morphology was examined under an inverted microscope (Nikon, T5100) with amplification of 100×. Cell migration was investigated by two methods, wound healing and transwell assays using Boyden chambers. For wound healing, MDA-MB-231 cells (2x105/mL) were plated in 12-wells plates and incubated properly until the culture reached 100% of confluence. Afterwards, a straight scratch was made and then cells were incubated with complex (0.15 1.20 µM) for 24h. Cells were viewed using an inverted microscope (Nikon, T5100) at 40× total magnification and images were captured (Moticam, 1000-S camera) at 0 h, 24 h. Closure area of migrating cells was measured and the percentage of wound closure was calculated. Cell migration was also assessed using 24-well Boyden chambers. MDA-MB-231 (0.5x105/350µL) cells, incubated or not with complex (0.15 1.20 µM) were seeded on the upper chamber in a DMEM incomplete medium (without FBS). In the lower chamber DMEM medium supplemented with 10% FBS was added. Cells were allowed to migrate for 22h. Then, cells that remained in the upper chamber were removed using a cotton swab. Cells that migrated to the other side of the upper chamber membrane were fixed (methanol) and stained with 1% toluidine blue. Migrated cells were quantified by manual counting and inhibition ratio was expressed as % of control. The results demonstrate that complex [Ru(AmSal)(dppe)2]PF6 has potent cytotoxic activity against breast tumor cells MDA-MB-231 (IC50 1.35 μM). The incubation of the complex with MDA-MB-231 profoundly altered their morphology, promoting the appearance of round cells, also indicating cell death. The complex was also able to inhibit the MDA-MB-231 cell migration in the highest concentrations tested, which were not cytotoxic to the cells. The results show that complex [Ru(AmSal)(dppe)2]PF6 complex was effective in promoting cytotoxic effect on TNBC MDA-MB-231 cells, altering their morphology and inhibiting migration of these cells. This work supports the evidence that complex [Ru(AmSal)(dppe)2]PF6 should be further studied in order to explore its potential of action on TNCB cells and could be used as a model for the design of a new antitumor drug to be applied in chemotherapy.
Citation Format: Cecília Patrícia Popolin, Amanda Blanque Becceneri, Angélica Ellen Graminha, Alzir Azevedo Batista, Márcia Regina Cominetti. Evaluation of ruthenium complex [Ru(AmSal)(dppe)2]PF6 on the proliferation, morphology, and migration of triple-negative MDA-MB-231 breast tumor cells [abstract]. In: Proceedings of the AACR Special Conference: Advances in Breast Cancer Research; 2017 Oct 7-10; Hollywood, CA. Philadelphia (PA): AACR; Mol Cancer Res 2018;16(8_Suppl):Abstract nr A71.
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Becceneri AB, Popolin CP, Plutin AM, Maistro EL, Batista AA, Cominetti MR. Abstract A16: Evaluation of the genotoxicity of ruthenium complex, trans-[Ru(ThySMet)(PPh3)2(bipy)]PF6, by comet assay in vitro on breast cells and in vivo. Mol Cancer Res 2018. [DOI: 10.1158/1557-3125.advbc17-a16] [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: 11/16/2022]
Abstract
Abstract
Cancer remains a major public health problem, accounting for one in six deaths worldwide. One of the most common types of cancer in women is breast cancer, which is extremely heterogeneous and composed of different subtypes. The majority of drugs currently used in cancer treatment show no selectivity for tumor cells, provoking undesired side effects. Cisplatin, discovered more than 40 years ago, and successive generations of platinum-based antitumor drugs have demonstrated that metal complexes may play an important role in the cancer treatment. Metals have unique characteristics that can be exploited by the chemistry coordination for the design of new drugs with fewer side effects. In the last two decades, ruthenium complexes have been widely studied and gained prominence for cancer treatment due to their unique characteristics, such as high rate of ligand exchange, accessible oxidation states, and the ability to mimic the iron to bind biologic molecules. This study aimed to evaluate the genotoxicity effects of the ruthenium complex trans-[Ru(ThySMet)(PPh3)2(bipy)]PF6 in vitro and in vivo by the comet assay, which can be used to measure DNA damage in individual eukaryotic cells. Briefly, for in vitro assays, MDA-MB-231 malignant breast cells and MCF-10A nonmalignant breast cells were seeded (1x105/1000µL) into sterile 12-well plates. Cells were allowed to grow at 37°C in 5% CO2 for 24h and then treated or not (control) with different concentrations (2, 4 or 8µM) of the ruthenium complex or positive control cisplatin (8µM) for 1h. After this period, cells were harvested, centrifuged and resuspended in 500μL of culture medium. For in vivo assays, the animals, swiss mice, were kept in a climate-controlled environment (22±2°C) with a 12/12h light/dark cycle and food and water ad libitum. The Animal Bioethics Committee (CEUA/UNESP FAMEMA, Marília, São Paulo, Brazil) approved this study (protocol no. 828/2016). Mice were divided into five groups with five animals in each group. The ruthenium complex (12.5, 25 or 50mg/kg), positive control doxorubicin (20mg/kg), or negative control (vehicle - DMSO) were administered intraperitoneally for 3 days at 24h interval. On the third day, peripheral blood from the tail vein was collected after 4h after the administration of the last treatment. Then both, cell suspension or blood, were mixed with 120µL of 0.5% low-melting point agarose and dropped on slides precoated with 1.5% normal melting point agarose and taken to a lysis solution for 1h. After denaturation (20min) and alkaline electrophoresis (25V, 300mA, 20min) the slides were neutralized and fixed. The slide staining was performed with GelRed® (Uniscience) and comet analysis of at least 150 random cells per group was done visually according to comet tail size using a fluorescence microscope (Olympus BX61-TRF5). In vitro results of genotoxic evaluation of trans-[Ru(ThySMet)(PPh3)2(bipy)]PF6 demonstrate that this complex was able to induce significant DNA damage in MDA-MB-231 cells at the highest concentrations (4 and 8μM), as well as the positive control, cisplatin (8μM). However, the complex did not cause DNA damage in MCF-10A cells; only cisplatin induced damage to these cells. The results of genotoxic evaluation of in vivo assays indicated that only the group of animals treated with the highest dose of the complex (50mg/kg) and the animals treated with doxorubicin presented DNA damage. These results demonstrate that this complex causes DNA damages in vitro with more specificity for tumor cells and that only in the highest dose it causes DNA damages in vivo. Therefore, more studies should be performed to evaluate its potential for breast cancer treatment.
Citation Format: Amanda Blanque Becceneri, Cecília Patrícia Popolin, Ana Maria Plutin, Edson Luis Maistro, Alzir Azevedo Batista, Márcia Regina Cominetti. Evaluation of the genotoxicity of ruthenium complex, trans-[Ru(ThySMet)(PPh3)2(bipy)]PF6, by comet assay in vitro on breast cells and in vivo [abstract]. In: Proceedings of the AACR Special Conference: Advances in Breast Cancer Research; 2017 Oct 7-10; Hollywood, CA. Philadelphia (PA): AACR; Mol Cancer Res 2018;16(8_Suppl):Abstract nr A16.
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Affiliation(s)
| | | | | | - Edson Luis Maistro
- 3Universidade Estadual Paulista “Júlio de Mesquita Filho”, Marília, SP, Brazil
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Becceneri AB, Popolin CP, Plutin AM, Maistro EL, Castellano EE, Batista AA, Cominetti MR. The trans-[Ru(PPh 3) 2(N,N-dimethyl-N'-thiophenylthioureato-k 2O,S)(bipy)]PF 6 complex has pro-apoptotic effects on triple negative breast cancer cells and presents low toxicity in vivo. J Inorg Biochem 2018; 186:70-84. [PMID: 29857173 DOI: 10.1016/j.jinorgbio.2018.05.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Revised: 05/18/2018] [Accepted: 05/19/2018] [Indexed: 10/16/2022]
Abstract
Triple negative breast cancer (TNBC) is a heterogeneous subtype of breast tumors that does not exhibit the expression of estrogen and progesterone receptors, neither the amplification of the human epidermal growth factor receptor 2 (HER-2) gene. Despite all the advances in cancer treatments, the development of new anticancer drugs for TNBC tumors is still a challenge. There is an increasing interest in new agents to be used in cancer treatment. Ruthenium is a metal that has unique characteristics and important in vivo and in vitro results achieved for cancer treatment. Thus, in this work, with the aim to develop anticancer drugs, three new ruthenium complexes containing acylthiourea ligands have been synthesized and characterized: trans-[Ru(PPh3)2(N,N-dibutyl-N'-benzoylthioureato-k2O,S)(2,2'-bipyridine (bipy))]PF6(1), trans-[Ru(PPh3)2(N,N-dimethyl-N'-thiophenylthioureato-k2O,S)(bipy)]PF6(2) and trans-[Ru(PPh3)2(N,N-dimethyl-N'-benzoylthioureato-k2O,S)(bipy)]PF6(3). Then, the cytotoxicity of these three new ruthenium complexes was investigated in TNBC MDA-MB-231 and in non-tumor MCF-10A cells. Complex (2) was the most selective complex and was chosen for further studies to verify its effects on cell morphology, adhesion, migration, invasion, induction of apoptosis and DNA damage in vitro, as well as its toxicity and capacity of causing DNA damage in vivo. Complex (2) inhibited proliferation, migration, invasion, adhesion, changed morphology and induced apoptosis, DNA damage and nuclear fragmentation of TNBC cells at lower concentrations compared to non-tumor MCF-10A cells, suggesting an effective action for this complex on tumor cells. Finally, complex (2) did not induce toxicity or caused DNA damage in vivo when low doses were administered to mice.
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Affiliation(s)
- Amanda Blanque Becceneri
- Departmento de Gerontologia, Universidade Federal de São Carlos, Rod. Washington Luís, Km 235, São Carlos, SP 13565-905, Brazil
| | - Cecília Patrícia Popolin
- Departmento de Gerontologia, Universidade Federal de São Carlos, Rod. Washington Luís, Km 235, São Carlos, SP 13565-905, Brazil
| | - Ana Maria Plutin
- Facultad de Química, Universidad de la Habana, Zapata s/n entre G y Carlitos Aguirre, 10400 Habana, Cuba
| | - Edson Luis Maistro
- Departamento de Fonoaudiologia, Faculdade de Filosofia e Ciências, Universidade Estadual Paulista "Júlio de Mesquita Filho", Av. Hygino Muzzi Filho, 737, Marília, SP 17525-900, Brazil
| | - Eduardo Ernesto Castellano
- Instituto de Física de São Carlos, Universidade de São Paulo, CP 780, CEP 13560-970 São Carlos, SP, Brazil
| | - Alzir Azevedo Batista
- Departamento de Química, Universidade Federal de São Carlos, Rod. Washington Luís, Km 235, São Carlos, SP 13565-905, Brazil
| | - Márcia Regina Cominetti
- Departmento de Gerontologia, Universidade Federal de São Carlos, Rod. Washington Luís, Km 235, São Carlos, SP 13565-905, Brazil.
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Silva VR, Corrêa RS, Santos LDS, Soares MBP, Batista AA, Bezerra DP. A ruthenium-based 5-fluorouracil complex with enhanced cytotoxicity and apoptosis induction action in HCT116 cells. Sci Rep 2018; 8:288. [PMID: 29321581 PMCID: PMC5762908 DOI: 10.1038/s41598-017-18639-6] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Accepted: 12/14/2017] [Indexed: 12/27/2022] Open
Abstract
Combination of multifunctionalities into one compound is a rational strategy in medicinal chemical design, and have often been used with metallodrug-based compounds. In the present study, we synthesized a novel ruthenium-based 5-fluorouracil complex [Ru(5-FU)(PPh3)2(bipy)]PF6 (PPh3 = triphenylphosphine; and bipy = 2,2′-bipyridine) with enhanced cytotoxicity in different cancer cells, and assessed its apoptosis induction action in human colon carcinoma HCT116 cells. The complex was characterized by infrared, cyclic voltammetry, molar conductance measurements, elemental analysis, NMR experiments and X-ray crystallographic analysis. In both 2D and 3D cell culture models, the complex presented cytotoxicity to cancer cells more potent than 5-FU. A typical morphology of apoptotic cell death, increased internucleosomal DNA fragmentation, without cell membrane permeability, loss of the mitochondrial transmembrane potential, increased phosphatidylserine externalization and caspase-3 activation were observed in complex-treated HCT116 cells. Moreover, the pre-treatment with Z-DEVD-FMK, a caspase-3 inhibitor, reduced the apoptosis induced by the complex, indicating cell death by apoptosis through caspase-dependent and mitochondrial intrinsic pathways. The complex failed to induce reactive oxygen species production and DNA intercalation. In conclusion, the novel complex displays enhanced cytotoxicity to different cancer cells, and is able to induce caspase-mediated apoptosis in HCT116 cells.
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Affiliation(s)
| | - Rodrigo S Corrêa
- Department of Chemistry, Federal University of Ouro Preto, Ouro Preto, Minas Gerais, 35400-000, Brazil
| | - Luciano de Souza Santos
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, Bahia, 40296-710, Brazil
| | - Milena Botelho Pereira Soares
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, Bahia, 40296-710, Brazil.,Center of Biotechnology and Cell therapy, Hospital São Rafael, Salvador, Bahia, 41253-190, Brazil
| | - Alzir Azevedo Batista
- Department of Chemistry, Federal University of São Carlos, São Carlos, São Paulo, 13561-901, Brazil
| | - Daniel Pereira Bezerra
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, Bahia, 40296-710, Brazil.
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Gagini T, Colina-Vegas L, Villarreal W, Borba-Santos LP, de Souza Pereira C, Batista AA, Kneip Fleury M, de Souza W, Rozental S, Costa LAS, Navarro M. Metal–azole fungistatic drug complexes as anti-Sporothrix spp. agents. NEW J CHEM 2018. [DOI: 10.1039/c8nj01544a] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Metal–antifungal drug complexes were investigated against fungus causing of sporotrichosis. They were more active against fungal cells than to mammalian cells.
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32
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Takarada JE, Guedes APM, Correa RS, Silveira-Lacerda EDP, Castelli S, Iacovelli F, Deflon VM, Batista AA, Desideri A. Ru/Fe bimetallic complexes: Synthesis, characterization, cytotoxicity and study of their interactions with DNA/HSA and human topoisomerase IB. Arch Biochem Biophys 2017; 636:28-41. [PMID: 29107586 DOI: 10.1016/j.abb.2017.10.015] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Revised: 10/16/2017] [Accepted: 10/24/2017] [Indexed: 12/20/2022]
Abstract
Three ruthenium/iron-based compounds, 1: [Ru(MIm)(bipy)(dppf)]PF6 (MIm = 2-mercapto-1-methylimidazole anion), 2: [RuCl(Im)(bipy)(dppf)]PF6 (Im = imidazole), and 3: [Ru(tzdt)(bipy)(dppf)]PF6 (tzdt = 1,3-thiazolidine-2-thione anion) (dppf = 1,1'-bis(diphenylphosphine)ferrocene and bipy = 2,2'-bipyridine), were synthesized, and characterized by elemental analyses, conductivity, UV/Vis, IR, 1H, 13C and 31P{1H} NMR spectroscopies, and by electrochemical technique. The complex 3 was also characterized by single-crystal X-ray. The three ruthenium(II) complexes show cytotoxicity against DU-145 (prostate carcinoma cells) and A549 (lung carcinoma cells) tumor cells. The free ligands do not exhibit any cytotoxic activity, such as evident by the IC50 values higher than 200 μM. UV/Vis and viscosity experiments showed that the complexes interact weakly with the DNA molecule, via electrostatic forces. The interaction of the complexes 1-3 with the HSA is moderate, with Kb values in range of 105-107 M-1, presenting a static mechanism of interaction stabilized by hydrophobic. Complexes 2 and 3 showed high affinity for the FA7 HSA site as evidenced by fluorescence spectroscopy and molecular docking. Complexes 1-3 were tested as potential human Topoisomerase IB inhibitors by analysing the different steps of the enzyme catalytic cycle. The results indicate that all compounds efficiently inhibit the DNA relaxation and the cleavage reaction, in which the effect increases upon pre-incubation. Complexes 1 and 2 are also able to slow down the religation reaction.
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Affiliation(s)
- Jessica E Takarada
- Department of Biology, University of Rome Tor Vergata, 00133, Rome, Italy
| | - Adriana P M Guedes
- Department of Chemistry, University Federal of São Carlos, CP 676, CEP 13565-905, São Carlos, São Paulo, Brazil
| | - Rodrigo S Correa
- Department of Chemistry, University Federal of São Carlos, CP 676, CEP 13565-905, São Carlos, São Paulo, Brazil
| | - Elisângela de P Silveira-Lacerda
- Laboratory of Molecular Genetics and Cytogenetics, Institute of Biological Sciences, University Federal of Goiás-UFG, Goiânia, Goiás, Brazil
| | - Silvia Castelli
- Department of Biology, University of Rome Tor Vergata, 00133, Rome, Italy
| | - Federico Iacovelli
- Department of Biology, University of Rome Tor Vergata, 00133, Rome, Italy
| | - Victor Marcelo Deflon
- Instituto de Química de São Carlos, Universidade de São Paulo, CP 780, CEP 13560-970, São Carlos, São Paulo, Brazil
| | - Alzir Azevedo Batista
- Department of Chemistry, University Federal of São Carlos, CP 676, CEP 13565-905, São Carlos, São Paulo, Brazil.
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Higuera-Padilla AR, Batista AA, Colina-Vegas L, Villarreal W, Colnago LA. Synthesis of the [(η6-p-cymene)Ru(dppb)Cl]PF6 complex and catalytic activity in the transfer hydrogenation of ketones. J COORD CHEM 2017. [DOI: 10.1080/00958972.2017.1390226] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
| | - Alzir Azevedo Batista
- Laboratório de Estrutura e Reatividade de Compostos Inorgânicos, UFSCar, São Carlos, Brazil
| | - Legna Colina-Vegas
- Laboratório de Estrutura e Reatividade de Compostos Inorgânicos, UFSCar, São Carlos, Brazil
| | - Wilmer Villarreal
- Laboratório de Estrutura e Reatividade de Compostos Inorgânicos, UFSCar, São Carlos, Brazil
| | - Luiz Alberto Colnago
- Laboratório de Ressonância Magnética Nuclear, Embrapa Instrumentação, São Carlos, Brazil
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Mello-Andrade F, da Costa WL, Pires WC, Pereira FDC, Cardoso CG, Lino-Junior RDS, Irusta VRC, Carneiro CC, de Melo-Reis PR, Castro CH, Almeida MAP, Batista AA, Silveira-Lacerda EDP. Antitumor effectiveness and mechanism of action of Ru(II)/amino acid/diphosphine complexes in the peritoneal carcinomatosis progression. Tumour Biol 2017; 39:1010428317695933. [DOI: 10.1177/1010428317695933] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Affiliation(s)
- Francyelli Mello-Andrade
- Laboratório de Genética Molecular e Citogenética, Departamento de Genética, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Brazil
| | - Wanderson Lucas da Costa
- Laboratório de Genética Molecular e Citogenética, Departamento de Genética, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Brazil
| | - Wanessa Carvalho Pires
- Laboratório de Genética Molecular e Citogenética, Departamento de Genética, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Brazil
| | - Flávia de Castro Pereira
- Laboratório de Genética Molecular e Citogenética, Departamento de Genética, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Brazil
| | - Clever Gomes Cardoso
- Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Brazil
| | - Ruy de Souza Lino-Junior
- Laboratório de Patologia Geral, Departamento de Microbiologia, Imunologia, Parasitologia e Patologia, Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, Brazil
| | | | - Cristiene Costa Carneiro
- Laboratório de Radiobiologia de Microrganismos e Mutagênese, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Brazil
| | - Paulo Roberto de Melo-Reis
- Laboratório de Estudos Experimentais em Biotecnologia, Departamento de Biomedicina, Pontifícia Universidade Católica de Goiás, Goiânia, Brazil
| | - Carlos Henrique Castro
- Laboratório de Fisiologia Autonômica e Cardíaca, Departamento de Fisiologia e Farmacologia, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Brazil
| | | | | | - Elisângela de Paula Silveira-Lacerda
- Laboratório de Genética Molecular e Citogenética, Departamento de Genética, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Brazil
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35
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Villarreal W, Colina-Vegas L, Visbal G, Corona O, Corrêa RS, Ellena J, Cominetti MR, Batista AA, Navarro M. Copper(I)–Phosphine Polypyridyl Complexes: Synthesis, Characterization, DNA/HSA Binding Study, and Antiproliferative Activity. Inorg Chem 2017; 56:3781-3793. [DOI: 10.1021/acs.inorgchem.6b02419] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Wilmer Villarreal
- Departamento de Química, Universidade Federal de São Carlos, CEP 13565-905 São Carlos, SP, Brazil
| | - Legna Colina-Vegas
- Departamento de Química, Universidade Federal de São Carlos, CEP 13565-905 São Carlos, SP, Brazil
| | - Gonzalo Visbal
- Diretoria de Metrologia
Aplicada às Ciências da Vida, Instituto Nacional de Metrologia, Qualidade e Tecnologia, CEP 25250-020 Xerém, RJ, Brazil
- Centro de
Desenvolvimento Tecnológico em Saúde (CDTS), Fundação Oswaldo Cruz - Fiocruz, CEP 21040-361 Rio
de Janeiro, RJ, Brazil
| | - Oscar Corona
- Centro de Química, Instituto Venezolano de Investigaciones Científicas (IVIC), Carretera Panamericana Km. 11, Apartado 20632, Altos de Pipe, 1020A Estado Miranda, Venezuela
| | - Rodrigo S. Corrêa
- Departamento de Química, Universidade Federal de São Carlos, CEP 13565-905 São Carlos, SP, Brazil
- ICEB, Departamento
de Química, Universidade Federal de Ouro Preto, CEP 35400-000 Ouro Preto, MG, Brazil
| | - Javier Ellena
- Instituto de Física de São Carlos, Universidade de São Paulo, CEP 13560-970 São Carlos, SP, Brazil
| | - Marcia Regina Cominetti
- Departamento
de Gerontología, Universidade Federal de São Carlos, CEP
13565-905 São Carlos, SP, Brazil
| | - Alzir Azevedo Batista
- Departamento de Química, Universidade Federal de São Carlos, CEP 13565-905 São Carlos, SP, Brazil
| | - Maribel Navarro
- Diretoria de Metrologia
Aplicada às Ciências da Vida, Instituto Nacional de Metrologia, Qualidade e Tecnologia, CEP 25250-020 Xerém, RJ, Brazil
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Montel AM, Dos Santos RG, da Costa PR, Silveira-Lacerda EDP, Batista AA, Dos Santos WG. Neutron activation increases activity of ruthenium-based complexes and induces cell death in glioma cells independent of p53 tumor suppressor gene. Biometals 2017; 30:295-305. [PMID: 28258507 PMCID: PMC5352776 DOI: 10.1007/s10534-017-0006-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Accepted: 02/21/2017] [Indexed: 12/15/2022]
Abstract
Novel metal complexes have received great attention in the last decades due to their potential anticancer activity. Notably, ruthenium-based complexes have emerged as good alternative to the currently used platinum-based drugs for cancer therapy, providing less toxicity and side effects to patients. Glioblastoma is an aggressive and invasive type of brain tumor and despite of advances is the field of neurooncology there is no effective treatment until now. Therefore, we sought to investigate the potential antiproliferative activity of phosphine-ruthenium-based complexes on human glioblastoma cell lines. Due to its octahedral structure as opposed to the square-planar geometry of platinum(II) compounds, ruthenium(II) complexes exhibit different structure-function relationship probably acting through a different mechanism from that of cisplatin beyond their ability to bind DNA. To better improve the pharmacological activity of metal complexes we hypothesized that neutron activation of ruthenium in the complexes would allow to decrease the effective concentration of the compound needed to kill tumor cells. Herein we report on the effect of unmodified and neutron activated phosphine ruthenium II complexes on glioblastoma cell lines carrying wild-type and mutated p53 tumor suppressor gene. Induction of apoptosis/authophagy as well as generation of reactive oxygen species were determined. The phosphine ruthenium II complexes tested were highly active against glioblastoma cell lines inducing cell death both through apoptosis and autophagy in a p53 independent fashion. Neutron activation of ruthenium compounds rendered them more active than their original counterparts suggesting a new strategy to improve the antitumor activity of these compounds.
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Affiliation(s)
- Aline Monezi Montel
- Laboratório de Genética Humana e Biologia Molecular, Unidade Acadêmica de Ciências da Saúde, Regional Jataí, Universidade Federal de Goiás, cidade Universitária-Campus Jatobá, BR 364, Km 195, n. 3800, Jataí, CEP 75801020, Brazil
| | | | | | | | | | - Wagner Gouvêa Dos Santos
- Laboratório de Genética Humana e Biologia Molecular, Unidade Acadêmica de Ciências da Saúde, Regional Jataí, Universidade Federal de Goiás, cidade Universitária-Campus Jatobá, BR 364, Km 195, n. 3800, Jataí, CEP 75801020, Brazil.
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De Grandis RA, Resende FA, da Silva MM, Pavan FR, Batista AA, Varanda EA. In vitro evaluation of the cyto-genotoxic potential of Ruthenium(II) SCAR complexes: a promising class of antituberculosis agents. Mutat Res Genet Toxicol Environ Mutagen 2016; 798-799:11-8. [PMID: 26994489 DOI: 10.1016/j.mrgentox.2016.01.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2015] [Revised: 01/18/2016] [Accepted: 01/27/2016] [Indexed: 01/24/2023]
Abstract
Tuberculosis is a top infectious disease killer worldwide, caused by the bacteria Mycobacterium tuberculosis. Increasing incidences of multiple drug-resistance (MDR) strains are emerging as one of the major public health threats. However, the drugs in use are still incapable of controlling the appalling upsurge of MDR. In recent years a marked number of research groups have devoted their attention toward the development of specific and cost-effective antimicrobial agents against targeted MDR-Tuberculosis. In previous studies, ruthenium(II) complexes (SCAR) have shown a promising activity against MDR-Tuberculosis although few studies have indeed considered ruthenium toxicity. Therefore, within the preclinical requirements, we have sought to determine the cyto-genotoxicity of three SCAR complexes in this present study. The treatment with the SCARs induced a concentration-dependent decrease in cell viability in CHO-K1 and HepG2 cells. Based on the clonogenic survival, SCAR 5 was found to be more cytotoxic while SCAR 6 exhibited selectivity action on tumor cells. Although SCAR 4 and 5 did not indicate any mutagenic activity as evidenced by the Ames and Cytokinesis block micronucleus cytome assays, the complex SCAR 6 was found to engender a frameshift mutation detected by Salmonella typhimurium in the presence of S9. Similarly, we observed a chromosomal damage in HepG2 cells with significant increases of micronuclei and nucleoplasmic bridges. These data indicate that SCAR 4 and 5 complexes did not show genotoxicity in our models while SCAR 6 was considered mutagenic. This study presented a comprehensive genotoxic evaluation of SCAR complexes were shown to be genotoxic in vitro. All in all, further studies are required to fully elucidate how the properties can affect human health.
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Affiliation(s)
- Rone Aparecido De Grandis
- Department of Biological Sciences, Faculty of Pharmaceutical Sciences of Araraquara, São Paulo State University, UNESP, Araraquara, São Paulo, Brazil
| | - Flávia Aparecida Resende
- Department of Biological Sciences and Health, Centro Universitário de Araraquara, UNIARA, Araraquara, São Paulo, Brazil.
| | - Monize Martins da Silva
- Department of Inorganic Chemistry, Federal University of São Carlos, UFSCAR, São Carlos, São Paulo, Brazil
| | - Fernando Rogério Pavan
- Department of Biological Sciences, Faculty of Pharmaceutical Sciences of Araraquara, São Paulo State University, UNESP, Araraquara, São Paulo, Brazil
| | - Alzir Azevedo Batista
- Department of Inorganic Chemistry, Federal University of São Carlos, UFSCAR, São Carlos, São Paulo, Brazil
| | - Eliana Aparecida Varanda
- Department of Biological Sciences, Faculty of Pharmaceutical Sciences of Araraquara, São Paulo State University, UNESP, Araraquara, São Paulo, Brazil
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Lima AP, Pereira FC, Almeida MAP, Mello FMS, Pires WC, Pinto TM, Delella FK, Felisbino SL, Moreno V, Batista AA, de Paula Silveira-Lacerda E. Cytoxicity and apoptotic mechanism of ruthenium(II) amino acid complexes in sarcoma-180 tumor cells. PLoS One 2014; 9:e105865. [PMID: 25329644 PMCID: PMC4201456 DOI: 10.1371/journal.pone.0105865] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2013] [Accepted: 07/30/2014] [Indexed: 11/18/2022] Open
Abstract
Over the past several decades, much attention has been focused on ruthenium complexes in antitumor therapy. Ruthenium is a transition metal that possesses several advantages for rational antitumor drug design and biological applications. In the present study, five ruthenium complexes containing amino acids were studied in vitro to determine their biological activity against sarcoma-180 tumor cells. The cytotoxicity of the complexes was evaluated by an MTT assay, and their mechanism of action was investigated. The results demonstrated that the five complexes inhibited the growth of the S180 tumor cell line, with IC50 values ranging from 22.53 µM to 50.18 µM, and showed low cytotoxicity against normal L929 fibroblast cells. Flow cytometric analysis revealed that the [Ru(gly)(bipy)(dppb)]PF6 complex (2) inhibited the growth of the tumor cells by inducing apoptosis, as evidenced by an increased number of Annexin V-positive cells and G0/G1 phase cell cycle arrest. Further investigation showed that complex 2 caused a loss of mitochondrial membrane potential; activated caspases 3, caspase-8, and caspase-9 and caused a change in the mRNA expression levels of caspase 3, caspase-9 as well as the bax genes. The levels of the pro-apoptotic Bcl-2 family protein Bak were increased. Thus, we demonstrated that ruthenium amino acid complexes are promising drugs against S180 tumor cells, and we recommend further investigations of their role as chemotherapeutic agents for sarcomas.
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Affiliation(s)
- Aliny Pereira Lima
- Laboratory of Molecular Genetics and Cytogenetics, Institute of Biological Sciences, University Federal of Goiás-UFG, Goiânia, Goiás, Brazil
| | - Flávia Castro Pereira
- Laboratory of Molecular Genetics and Cytogenetics, Institute of Biological Sciences, University Federal of Goiás-UFG, Goiânia, Goiás, Brazil
| | | | - Francyelli Mariana Santos Mello
- Laboratory of Molecular Genetics and Cytogenetics, Institute of Biological Sciences, University Federal of Goiás-UFG, Goiânia, Goiás, Brazil
| | - Wanessa Carvalho Pires
- Laboratory of Molecular Genetics and Cytogenetics, Institute of Biological Sciences, University Federal of Goiás-UFG, Goiânia, Goiás, Brazil
| | - Thallita Monteiro Pinto
- Laboratory of Molecular Genetics and Cytogenetics, Institute of Biological Sciences, University Federal of Goiás-UFG, Goiânia, Goiás, Brazil
| | - Flávia Karina Delella
- Department of Morphology, Institute of Biosciences – University Estadual Paulista (UNESP), Botucatu, São Paulo, Brazil
| | - Sérgio Luis Felisbino
- Department of Morphology, Institute of Biosciences – University Estadual Paulista (UNESP), Botucatu, São Paulo, Brazil
| | - Virtudes Moreno
- Department of Inorganic Chemistry, Universitat de Barcelona, Barcelona, Spain
| | - Alzir Azevedo Batista
- Department of Chemistry, University Federal of São Carlos, São Carlos, São Paulo, Brazil
| | - Elisângela de Paula Silveira-Lacerda
- Laboratory of Molecular Genetics and Cytogenetics, Institute of Biological Sciences, University Federal of Goiás-UFG, Goiânia, Goiás, Brazil
- * E-mail:
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de Freitas ES, da Silva PB, Chorilli M, Batista AA, de Oliveira Lopes E, da Silva MM, Leite CQF, Pavan FR. Nanostructured lipid systems as a strategy to improve the in vitro cytotoxicity of ruthenium(II) compounds. Molecules 2014; 19:5999-6008. [PMID: 24818578 PMCID: PMC6271922 DOI: 10.3390/molecules19055999] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2014] [Revised: 04/26/2014] [Accepted: 05/04/2014] [Indexed: 01/14/2023] Open
Abstract
: Tuberculosis is an ancient disease that is still present as a global public health problem. Our group has been investigating new molecules with anti-TB activity. In this context, inorganic chemistry has been a quite promising source of such molecules, with excellent results seen with ruthenium compounds. Nanostructured lipid systems may potentiate the action of drugs by reducing the required dosage and side effects and improving the antimicrobial effects. The aim of this study was to develop a nanostructured lipid system and then characterize and apply these encapsulated compounds (SCARs1, 2 and 4) with the goal of improving their activity by decreasing the Minimum Inhibitory Concentration (MIC90) and reducing the cytotoxicity (IC50). The nanostructured system was composed of 10% phase oil (cholesterol), 10% surfactant (soy oleate, soy phosphatidylcholine and Eumulgin®) and 80% aqueous phase (phosphate buffer pH = 7.4). Good activity against Mycobacterium tuberculosis was maintained after the incorporation of the compounds into the nanostructured lipid system, while the cytotoxicity decreased dramatically, in some cases up to 20 times less toxic than the unencapsulated drug.
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Affiliation(s)
- Eduardo Sinesio de Freitas
- Departamento de Ciências Biológicas, Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista, Araraquara, São Paulo 14801-902, Brazil
| | - Patricia Bento da Silva
- Departamento de Fármacos e Medicamentos, Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista, Araraquara, São Paulo 14801-902, Brazil
| | - Marlus Chorilli
- Departamento de Fármacos e Medicamentos, Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista, Araraquara, São Paulo 14801-902, Brazil
| | - Alzir Azevedo Batista
- Departamento de Química, Universidade Federal de São Carlos, São Carlos, São Paulo 13565-905, Brazil
| | - Erica de Oliveira Lopes
- Departamento de Ciências Biológicas, Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista, Araraquara, São Paulo 14801-902, Brazil
| | - Monize Martins da Silva
- Departamento de Química, Universidade Federal de São Carlos, São Carlos, São Paulo 13565-905, Brazil
| | - Clarice Queico Fujimura Leite
- Departamento de Ciências Biológicas, Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista, Araraquara, São Paulo 14801-902, Brazil
| | - Fernando Rogério Pavan
- Departamento de Ciências Biológicas, Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista, Araraquara, São Paulo 14801-902, Brazil.
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Martins FT, Corrêa RS, Batista AA, Ellena J. Quasi-enantiomeric single-nucleoside and quasi-racemic two-nucleoside hydrochloride salts and ruthenium complexes of cytidine and 2′,3′-dideoxycytidine analogs unveiling the negligible structure-driving role of the 2′,3′-moieties. CrystEngComm 2014. [DOI: 10.1039/c4ce00678j] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The role of differences at the 2′,3′-positions in the crystal structure of cytidine nucleosides.
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Affiliation(s)
| | - Rodrigo S. Corrêa
- Departamento de Química
- Universidade Federal de São Carlos – UFSCar
- São Carlos, Brazil
| | - Alzir Azevedo Batista
- Departamento de Química
- Universidade Federal de São Carlos – UFSCar
- São Carlos, Brazil
| | - Javier Ellena
- Departamento de Física e Ciência Interdisciplinar - FCI
- Instituto de Física de São Carlos
- Universidade de São Paulo
- São Carlos, Brazil
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Delolo FG, Rodrigues C, Silva MMD, Dinelli LR, Delling FN, Zukerman-Schpector J, Batista AA. A New Electrochemical Sensor Containing a Film of Chitosan-Supported Ruthenium: Detection and Quantification of Sildenafil Citrate and Acetaminophen. J BRAZIL CHEM SOC 2014. [DOI: 10.5935/0103-5053.20140031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Brito RMC, Batista AA, Ellena J, Castellano EE, Diógenes ICN, Lopes LGDF, de Sousa JR, Moreira ÍDS. Synthesis, characterization and crystal structure of a novel thiocyanate–ruthenium(II) complex. INORG CHEM COMMUN 2007. [DOI: 10.1016/j.inoche.2007.09.024] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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45
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Von Poelhsitz G, Bogado AL, de Araujo MP, Selistre-de-Araújo HS, Ellena J, Castellano EE, Batista AA. Synthesis, characterization, X-ray structure and preliminary in vitro antitumor activity of the nitrosyl complex fac-[RuCl3(NO)(dppf)], dppf=1,1′-bis(diphenylphosphine)ferrocene. Polyhedron 2007. [DOI: 10.1016/j.poly.2007.03.009] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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46
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Poelhsitz GV, Bogado AL, de Souza GD, Rodrigues-Filho E, Batista AA, de Araujo MP. New nitrosyl ruthenium complex [RuCl(NO)(dcype)(bipy)](PF6)2: Synthesis, electrochemistry, NMR and ESI-MS/MS studies. INORG CHEM COMMUN 2007. [DOI: 10.1016/j.inoche.2006.09.023] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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47
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Von Poelhsitz G, Rodrigues BL, Batista AA. Partially oxidized ruthenium phosphine thiolates: [Ru(pySO2)0.33(pyS)1.67(dppe)] and [Ru(pySO2)0.355(pyS)1.645(dppp)]. Acta Crystallogr C 2006; 62:m424-7. [PMID: 16954626 DOI: 10.1107/s0108270106027491] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2006] [Accepted: 07/15/2006] [Indexed: 11/10/2022] Open
Abstract
The crystal structures of [1,3-bis(diphenylphosphino)ethane-kappa2P,P'](pyridine-2-sulfinato-kappa2N,S)(pyridine-2-thiolato-kappa2N,S)ruthenium(II), [Ru(C5H4NO2S)0.33(C5H4NS)1.67(C26H24P2)] or [Ru(pySO2)1-x(pyS)1+x(dppe)] (x=0.67), (I), and [1,3-bis(diphenylphosphino)propane-kappa2P,P'](pyridine-2-sulfinato-kappa2N,S)(pyridine-2-thiolato-kappa2N,S)ruthenium(II), [Ru(C5H4NO2S)0.355(C5H4NS)1.645(C27H26P2)] or [Ru(pySO2)1-x(pyS)1+x(dppp)] (x=0.645), (II), are composed of neutral distorted octahedral RuII complexes with chelating pyridine-2-thiolate, pyridine-2-sulfinate and biphosphine ligands. The S atoms are trans to each other, while pairs of P and N atoms are in cis positions. Partial double-bond character is observed for C-S. The crystal packing consists of monolayers stabilized by C-H...O and C-H...S interactions, and is affected by the alkyl-chain lengths.
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Affiliation(s)
- G Von Poelhsitz
- Departamento de Química, Universidade Federal de São Carlos, Caixa Postal 676, 13565-905 São Carlos - SP, Brazil
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48
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Von Poelhsitz G, de Lima RC, Carlos RM, Ferreira AG, Batista AA, de Araujo AS, Ellena J, Castellano EE. Influence of ligands on the isomerization in [RuCl3(NO)(P–P)] complexes, [P–P=R2P(CH2)nPR2 (n=1–3) and R2P(CH2)POR2, PR2–CHCH–PR2, R=Ph and (C6H11)2P-(CH2)2-P(C6H11)2]. Inorganica Chim Acta 2006. [DOI: 10.1016/j.ica.2005.12.016] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Von Poelhsitz G, Batista AA, Ellena J, Castellano EE, Lang ES. Synthesis and characterization of nitrosyl complexes containing 4,6-dimethyl-pyrimidine-2-thiolato (‘SpymMe2’) as ligand: [Ru(‘SpymMe2’,-N,-S) (‘SpymMe2’,-S)(NO)(P–P)](PF6) (P–P=1,2-bis(diphenylphosphino)ethane or 1,2-bis(diphenylphosphino)ethylene. INORG CHEM COMMUN 2005. [DOI: 10.1016/j.inoche.2005.06.003] [Citation(s) in RCA: 14] [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: 11/27/2022]
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Barbosa Neto NM, De Boni L, Mendonça CR, Misoguti L, Queiroz SL, Dinelli LR, Batista AA, Zilio SC. Nonlinear Absorption Dynamics in Tetrapyridyl Metalloporphyrins. J Phys Chem B 2005; 109:17340-5. [PMID: 16853214 DOI: 10.1021/jp052168i] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Nonlinear absorption dynamics of Zn(2+), Cu(2+), and Ni(2+) tetrapyridyl porphyrins in chloroform/methanol solutions were investigated at 532 nm with the Z-scan technique. Additional techniques such as UV-vis absorption spectroscopy and time-resolved fluorescence were used to obtain parameters that are important for the analysis of the population dynamics. A marked difference was observed in the nonlinear absorption and excited-state dynamics of closed (ZnTPyP)- and open-shell metalloporphyrins (CuTPyP and NiTPyP). ZnTPyP presents a reverse saturable absorption whose dynamics can be completely described by means of a simple five-energy-level diagram. On the other hand, CuTPyP and NiTPyP have a different excited-state dynamics, presenting a saturable absorption behavior and faster relaxation rates that were attributed to the presence of unfilled d shells of the central ion.
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Affiliation(s)
- N M Barbosa Neto
- Instituto de Física de São Carlos, Universidade de São Paulo, Caixa Postal 369, 13560-970 São Carlos, SP, Brazil.
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