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Libardi SH, Ahmad A, Ferreira FB, Oliveira RJ, Caruso ÍP, Melo FA, de Albuquerque S, Cardoso DR, Burtoloso ACB, Borges JC. Interaction between diterpene icetexanes and old yellow enzymes of Leishmania braziliensis and Trypanosoma cruzi. Int J Biol Macromol 2024; 259:129192. [PMID: 38216013 DOI: 10.1016/j.ijbiomac.2023.129192] [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: 06/24/2023] [Revised: 12/21/2023] [Accepted: 12/31/2023] [Indexed: 01/14/2024]
Abstract
Old Yellow Enzymes (OYEs) are flavin-dependent redox enzymes that promote the asymmetric reduction of activated alkenes. Due to the high importance of flavoenzymes in the metabolism of organisms, the interaction between OYEs from the parasites Trypanosoma cruzi and Leishmania braziliensis and three diterpene icetexanes (brussonol and two analogs), were evaluated in the present study, and differences in the binding mechanism and inhibition capacity of these molecules were examined. Although the aforementioned compounds showed poor and negligible activities against T. cruzi and L. braziliensis cells, respectively, the experiments with the purified enzymes indicated that the interaction occurs by divergent mechanisms. Overall, the ligands' inhibitory effect depends on their accessibility to the N5 position of the flavin's isoalloxazine ring. The results also indicated that the OYEs found in both parasites share structural similarities and showed affinities for the diterpene icetexanes in the same range. Nevertheless, the interaction between OYEs and ligands is directed by enthalpy and/or entropy in distinct ways. In conclusion, the binding site of both OYEs exhibits remarkable plasticity, and a large range of different molecules, including that can be substrates and inhibitors, can bind this site. This plasticity should be considered in drug design using OYE as a target.
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Affiliation(s)
- Silvia H Libardi
- Instituto de Química de São Carlos, Universidade de São Paulo - USP, 13560-970 São Carlos, SP, Brazil
| | - Anees Ahmad
- Instituto de Química de São Carlos, Universidade de São Paulo - USP, 13560-970 São Carlos, SP, Brazil
| | | | - Ronaldo J Oliveira
- Instituto de Ciências Exatas, Naturais e Educação, Universidade Federal do Triângulo Mineiro, 38064-200 Uberaba, MG, Brazil
| | - Ícaro P Caruso
- Instituto de Biociências, Letras e Ciências Exatas (IBILCE) - UNESP, 15054-000 São José do Rio Preto, SP, Brazil; Instituto de Bioquímica Médica Leopoldo de Meis and Centro Nacional para Biologia Estrutural e Bioimagem, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ, Brazil
| | - Fernando A Melo
- Instituto de Biociências, Letras e Ciências Exatas (IBILCE) - UNESP, 15054-000 São José do Rio Preto, SP, Brazil
| | - Sergio de Albuquerque
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo - USP, Ribeirão Preto, SP CEP 14040-903, Brazil
| | - Daniel R Cardoso
- Instituto de Química de São Carlos, Universidade de São Paulo - USP, 13560-970 São Carlos, SP, Brazil
| | - Antonio C B Burtoloso
- Instituto de Química de São Carlos, Universidade de São Paulo - USP, 13560-970 São Carlos, SP, Brazil
| | - Júlio C Borges
- Instituto de Química de São Carlos, Universidade de São Paulo - USP, 13560-970 São Carlos, SP, Brazil.
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Coelho HRS, Neves SC, Menezes JNS, Antoniolli-Silva ACMB, Oliveira RJ. Cell therapy with adipose tissue-derived human stem cells in the urinary bladder improves detrusor contractility and reduces voiding residue. BRAZ J BIOL 2023; 83:e268540. [PMID: 37132740 DOI: 10.1590/1519-6984.268540] [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] [Received: 10/10/2022] [Accepted: 02/27/2023] [Indexed: 05/04/2023] Open
Abstract
Detrusor hypocontractility (DH) is a disease without a gold standard treatment in traditional medicine. Therefore, there is a need to develop innovative therapies. The present report presents the case of a patient with DH who was transplanted with 2 x 106 adipose tissue-derived mesenchymal stem cells twice and achieved significant improvements in their quality of life. The results showed that cell therapy reduced the voiding residue from 1,800 mL to 800 mL, the maximum cystometric capacity from 800 to 550 mL, and bladder compliance from 77 to 36.6 mL/cmH2O. Cell therapy also increased the maximum flow from 3 to 11 mL/s, the detrusor pressure from 08 to 35 cmH2O, the urine volume from 267 to 524 mL and the bladder contractility index (BCI) value from 23 to 90. The International Continence on Incontinence Questionnaire - Short Form score decreased from 17 to 8. Given the above, it is inferred that the transplantation of adipose tissue-derived mesenchymal stem cells is an innovative and efficient therapeutic strategy for DH treatment and improves the quality of life of patients affected by this disease.
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Affiliation(s)
- H R S Coelho
- Universidade Federal do Mato Grosso do Sul - UFMS, Faculdade de Medicina - FAMED, Centro de Estudos em Células-Tronco, Terapia Celular e Genética Toxicológica - CeTroGen, Campo Grande, MS, Brasil
- Universidade Federal do Mato Grosso do Sul - UFMS, Faculdade de Medicina - FAMED, Programa de Pós-graduação em Saúde e Desenvolvimento na Região Centro-Oeste, Campo Grande, MS, Brasil
| | - S C Neves
- Universidade Federal do Mato Grosso do Sul - UFMS, Faculdade de Medicina - FAMED, Centro de Estudos em Células-Tronco, Terapia Celular e Genética Toxicológica - CeTroGen, Campo Grande, MS, Brasil
- Universidade Federal do Mato Grosso do Sul - UFMS, Faculdade de Medicina - FAMED, Programa de Pós-graduação em Saúde e Desenvolvimento na Região Centro-Oeste, Campo Grande, MS, Brasil
| | | | - A C M B Antoniolli-Silva
- Universidade Federal do Mato Grosso do Sul - UFMS, Faculdade de Medicina - FAMED, Centro de Estudos em Células-Tronco, Terapia Celular e Genética Toxicológica - CeTroGen, Campo Grande, MS, Brasil
- Universidade Federal do Mato Grosso do Sul - UFMS, Faculdade de Medicina - FAMED, Programa de Pós-graduação em Saúde e Desenvolvimento na Região Centro-Oeste, Campo Grande, MS, Brasil
| | - R J Oliveira
- Universidade Federal do Mato Grosso do Sul - UFMS, Faculdade de Medicina - FAMED, Centro de Estudos em Células-Tronco, Terapia Celular e Genética Toxicológica - CeTroGen, Campo Grande, MS, Brasil
- Universidade Federal do Mato Grosso do Sul - UFMS, Faculdade de Medicina - FAMED, Programa de Pós-graduação em Saúde e Desenvolvimento na Região Centro-Oeste, Campo Grande, MS, Brasil
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Guedes PHG, Brussasco JG, Moço ACR, Moraes DD, Flauzino JMR, Luz LFG, Almeida MTG, Soares MMCN, Oliveira RJ, Madurro JM, Brito-Madurro AG. Ninhydrin as a novel DNA hybridization indicator applied to a highly reusable electrochemical genosensor for Candida auris. Talanta 2021; 235:122694. [PMID: 34517578 DOI: 10.1016/j.talanta.2021.122694] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [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: 04/24/2021] [Revised: 07/02/2021] [Accepted: 07/06/2021] [Indexed: 12/11/2022]
Abstract
This work reports a simple strategy for Candida auris genomic DNA (gDNA) detection, a multi-resistant fungus associated with nosocomial outbreaks in healthcare settings, presenting high mortality and morbidity rates. The platform was developed using gold electrode sensitized with specific DNA capture probe and ninhydrin as a novel DNA hybridization indicator. The genosensor was able to detect C. auris in urine sample by differential pulse voltammetry and electrochemical impedance spectroscopy. The biosensor's analytical performance was evaluated by differential pulse voltammetry, detecting up to 4.5 pg μL-1 of C. auris gDNA in urine (1:10, V/V). Moreover, the genosensor was reused eight times with no loss in the current signal response. The genosensor showed selectivity and stability, maintaining 100% of its response up to 80 days of storage. In order to analyze interactions of single and double-stranded DNA with ninhydrin, SEM, AFM and molecular dynamics studies followed by docking simulations were performed. Theoretical calculations showed ninhydrin interactions more favorably with dsDNA in an A-T rich binding pocket rather than with the ssDNA. Therefore, the proposed system is a promising electrochemical detection device towards a more accurate detection of C. auris gDNA in biological samples.
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Affiliation(s)
- Pedro H G Guedes
- Institute of Biotechnology, Federal University of Uberlândia, Uberlândia, Brazil
| | - Jéssica G Brussasco
- Institute of Biotechnology, Federal University of Uberlândia, Uberlândia, Brazil
| | - Anna C R Moço
- Institute of Biotechnology, Federal University of Uberlândia, Uberlândia, Brazil
| | - Dayane D Moraes
- Institute of Biotechnology, Federal University of Uberlândia, Uberlândia, Brazil
| | - José M R Flauzino
- Institute of Biotechnology, Federal University of Uberlândia, Uberlândia, Brazil
| | - Luiz F G Luz
- Institute of Chemistry, Federal University of Uberlândia, Uberlândia, Brazil
| | | | | | - Ronaldo J Oliveira
- Department of Physics, Institute of Exact, Natural Sciences and Education, Federal University of Triângulo Mineiro, Uberaba, Brazil
| | - João M Madurro
- Institute of Chemistry, Federal University of Uberlândia, Uberlândia, Brazil
| | - Ana G Brito-Madurro
- Institute of Biotechnology, Federal University of Uberlândia, Uberlândia, Brazil.
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4
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Contessoto VG, Ferreira PHB, Chahine J, Leite VBP, Oliveira RJ. Small Neutral Crowding Solute Effects on Protein Folding Thermodynamic Stability and Kinetics. J Phys Chem B 2021; 125:11673-11686. [PMID: 34644091 DOI: 10.1021/acs.jpcb.1c07663] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Molecular crowding is a ubiquitous phenomenon in biological systems, with significant consequences on protein folding and stability. Small compounds, such as the osmolyte trimethylamine N-oxide (TMAO), can also present similar effects. To analyze the effects arising from these solute-like molecules, we performed a series of crowded coarse-grained folding simulations. Two well-known proteins were chosen, CI2 and SH3, modeled by the alpha-carbon-structure-based model. In the simulations, the crowding molecules were represented by low-sized neutral atom beads in different concentrations. The results show that a low level of the volume fraction occupied by neutral agents can change protein stability and folding kinetics for the two systems. However, the kinetics were shown to be unaffected in their respective folding temperatures. The faster kinetics correlates with changes in the folding route for systems at the same temperature, where non-native contacts were shown to be relevant. The transition states of the two systems with and without crowders are similar. In the case of SH3, there are differences in the structuring of two strands, which may be associated with the increase in its folding rate, in addition to the destabilization of the denatured ensemble. The present study also detected a crossover in the thermodynamic stability behavior, previously observed experimentally and theoretically. As the temperature increases, crowders change from destabilizing to stabilizing agents.
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Affiliation(s)
- Vinícius G Contessoto
- Department of Physics, Institute of Biosciences, Letters and Exact Sciences, São Paulo State University, São José do Rio Preto 15054-000, Brazil
| | - Paulo H B Ferreira
- Laboratório de Biofísica Teórica, Departamento de Física, Instituto de Ciências Exatas, Naturais e Educação, Universidade Federal do Triângulo Mineiro, Uberaba 38064-200, Brazil
| | - Jorge Chahine
- Department of Physics, Institute of Biosciences, Letters and Exact Sciences, São Paulo State University, São José do Rio Preto 15054-000, Brazil
| | - Vitor B P Leite
- Department of Physics, Institute of Biosciences, Letters and Exact Sciences, São Paulo State University, São José do Rio Preto 15054-000, Brazil
| | - Ronaldo J Oliveira
- Laboratório de Biofísica Teórica, Departamento de Física, Instituto de Ciências Exatas, Naturais e Educação, Universidade Federal do Triângulo Mineiro, Uberaba 38064-200, Brazil
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5
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Lopes CD, Possato B, Gaspari APS, Oliveira RJ, Abram U, Almeida JPA, Rocho FDR, Leitão A, Montanari CA, Maia PIS, da Silva JS, de Albuquerque S, Carneiro ZA. Organometallic Gold(III) Complex [Au(Hdamp)(L1 4)] + (L1 = SNS-Donating Thiosemicarbazone) as a Candidate to New Formulations against Chagas Disease. ACS Infect Dis 2019; 5:1698-1707. [PMID: 31419384 DOI: 10.1021/acsinfecdis.8b00284] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Chagas disease remains a serious public health concern with unsatisfactory treatment outcomes due to strain-specific drug resistance and various side effects. To identify new therapeutic drugs against Trypanosoma cruzi, we evaluated both the in vitro and in vivo activity of the organometallic gold(III) complex [Au(III)(Hdamp)(L14)]Cl (L1 = SNS-donating thiosemicarbazone), henceforth denoted 4-Cl. Our results demonstrated that 4-Cl was more effective than benznidazole (Bz) in eliminating both the extracellular trypomastigote and intracellular amastigote forms of the parasite without cytotoxic effects on mammalian cells. In in vivo assays, 4-Cl in PBS solution loses the protonation and becomes the 4-neutral. 4-Neutral reduced parasitaemia and tissue parasitism in addition to protecting the liver and heart from tissue damage at 2.8 mg/kg/day. All these changes resulted in the survival of 100% of the mice treated with the gold complex during the acute phase. Analyzing the surviving animals of the acute infection, the parasite load after 150 days of infection was equivalent to those treated with the standard dose of Bz without demonstrating the hepatotoxicity of the latter. In addition, we identified a modulation of interferon gamma (IFN-γ) levels that may be targeting the disease's positive outcome. To the best of our knowledge, this is the first gold organometallic study that shows promise in an in vivo experimental model against Chagas disease.
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Affiliation(s)
- Carla Duque Lopes
- Department of Clinical Toxicological and Bromatological Analysis School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, São Paulo 14040-903, Brazil
- Departament of Biochemistry and Immunology, School of Medicine, University of São Paulo, Ribeirão Preto, São Paulo 14049-900, Brazil
| | - Bruna Possato
- Department of Clinical Toxicological and Bromatological Analysis School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, São Paulo 14040-903, Brazil
| | - Ana Paula S. Gaspari
- Department of Clinical Toxicological and Bromatological Analysis School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, São Paulo 14040-903, Brazil
| | - Ronaldo J. Oliveira
- Núcleo de Desenvolvimento de Compostos Bioativos (NDCBio), Universidade Federal do Triângulo Mineiro, Uberaba, Minas Gerais 38025-470, Brazil
| | - Ulrich Abram
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Berlin D-14195, Germany
| | - José P. A. Almeida
- Department of Clinical Toxicological and Bromatological Analysis School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, São Paulo 14040-903, Brazil
| | - Fernanda dos Reis Rocho
- Grupo de Estudos em Química Medicinal de Produtos Naturais−NEQUIMED-PN, Instituto de Química de São Carlos, Universidade de São Paulo, Av. Trabalhador Sancarlense 400, P.O. Box 780, São Carlos, São Paulo 13560-960, Brazil
| | - Andrei Leitão
- Grupo de Estudos em Química Medicinal de Produtos Naturais−NEQUIMED-PN, Instituto de Química de São Carlos, Universidade de São Paulo, Av. Trabalhador Sancarlense 400, P.O. Box 780, São Carlos, São Paulo 13560-960, Brazil
| | - Carlos A. Montanari
- Grupo de Estudos em Química Medicinal de Produtos Naturais−NEQUIMED-PN, Instituto de Química de São Carlos, Universidade de São Paulo, Av. Trabalhador Sancarlense 400, P.O. Box 780, São Carlos, São Paulo 13560-960, Brazil
| | - Pedro I. S. Maia
- Núcleo de Desenvolvimento de Compostos Bioativos (NDCBio), Universidade Federal do Triângulo Mineiro, Uberaba, Minas Gerais 38025-470, Brazil
| | - João S. da Silva
- Departament of Biochemistry and Immunology, School of Medicine, University of São Paulo, Ribeirão Preto, São Paulo 14049-900, Brazil
| | - Sérgio de Albuquerque
- Department of Clinical Toxicological and Bromatological Analysis School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, São Paulo 14040-903, Brazil
| | - Zumira A. Carneiro
- Department of Clinical Toxicological and Bromatological Analysis School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, São Paulo 14040-903, Brazil
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Antunes VU, Llontop EE, Vasconcelos FNDC, López de Los Santos Y, Oliveira RJ, Lincopan N, Farah CS, Doucet N, Mittermaier A, Favaro DC. Importance of the β5-β6 Loop for the Structure, Catalytic Efficiency, and Stability of Carbapenem-Hydrolyzing Class D β-Lactamase Subfamily OXA-143. Biochemistry 2019; 58:3604-3616. [PMID: 31355630 DOI: 10.1021/acs.biochem.9b00365] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The class D β-lactamase OXA-143 has been described as an efficient penicillinase, oxacillinase, and carbapenemase. The D224A variant, known as OXA-231, was described in 2012 as exhibiting less activity toward imipenem and increased oxacillinase activity. Additionally, the P227S mutation was reported as a case of convergent evolution for homologous enzymes. To investigate the impact of both mutations (D224A and P227S), we describe in this paper a deep investigation of the enzymatic activities of these three homologues. OXA-143(P227S) presented enhanced catalytic activity against ampicillin, oxacillins, aztreonam, and carbapenems. In addition, OXA-143(P227S) was the only member capable of hydrolyzing ceftazidime. These enhanced activities were due to a combination of a higher affinity (lower Km) and a higher turnover number (higher kcat). We also determined the crystal structure of apo OXA-231. As expected, the structure of this variant is very similar to the published OXA-143 structure, except for the two M223 conformations and the absence of electron density for three solvent-exposed loop segments. Molecular dynamics calculations showed that both mutants experience higher flexibility compared to that of the wild-type form. Therefore, our results illustrate that D224A and P227S act as deleterious and positive mutations, respectively, within the evolutionary path of the OXA-143 subfamily toward a more efficient carbapenemase.
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Affiliation(s)
- Víctor U Antunes
- Department of Organic Chemistry , State University of Campinas , São Paulo , SP 13083-970 , Brazil
| | - Edgar E Llontop
- Department of Biochemistry, Institute of Chemistry , University of Sao Paulo , Av. Prof. Lineu Prestes 748 , São Paulo , SP 05508-000 , Brazil
| | | | - Yossef López de Los Santos
- Centre Armand-Frappier Santé Biotechnologie , Institut National de la Recherche Scientifique (INRS), Université du Québec , Laval , QC H7V 1B7 , Canada
| | - Ronaldo J Oliveira
- Laboratório de Biofísica Teórica, Departamento de Física, Instituto de Ciências Exatas, Naturais e Educação , Universidade Federal do Triângulo Mineiro , 38064-200 Uberaba , MG , Brazil
| | - Nilton Lincopan
- Department of Microbiology, Institute of Biomedical Sciences , University of Sao Paulo , São Paulo , SP 05508-900 , Brazil
| | - Chuck S Farah
- Department of Biochemistry, Institute of Chemistry , University of Sao Paulo , Av. Prof. Lineu Prestes 748 , São Paulo , SP 05508-000 , Brazil
| | - Nicolas Doucet
- Centre Armand-Frappier Santé Biotechnologie , Institut National de la Recherche Scientifique (INRS), Université du Québec , Laval , QC H7V 1B7 , Canada.,PROTEO, the Québec Network for Research on Protein Function, Engineering, and Applications , Université Laval , Québec , QC G1V 0A6 , Canada
| | - Anthony Mittermaier
- Department of Chemistry , McGill University , Montreal , QC H3A 0G4 , Canada.,PROTEO, the Québec Network for Research on Protein Function, Engineering, and Applications , Université Laval , Québec , QC G1V 0A6 , Canada
| | - Denize C Favaro
- Department of Organic Chemistry , State University of Campinas , São Paulo , SP 13083-970 , Brazil.,Department of Chemistry , McGill University , Montreal , QC H3A 0G4 , Canada
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7
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Carneiro ZA, Lima JC, Lopes CD, Gaspari APS, de Albuquerque S, Dinelli LR, Veloso-Silva LLW, Paganelli MO, Libardi SH, Oliveira CG, Deflon VM, Oliveira RJ, Borges JC, Maia PIS. Heterobimetallic nickel(II) and palladium(II) complexes derived from S-benzyl-N- (ferrocenyl)methylenedithiocarbazate: Trypanocidal activity and interaction with Trypanosoma cruzi Old Yellow Enzyme (TcOYE). Eur J Med Chem 2019; 180:213-223. [PMID: 31306908 DOI: 10.1016/j.ejmech.2019.07.014] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Revised: 06/10/2019] [Accepted: 07/04/2019] [Indexed: 10/26/2022]
Abstract
Reactions of Ni(II) and Pd(II) precursors with S-benzyl-N-(ferrocenyl)methylenedithiocarbazate (HFedtc) led to the formation of heterobimetallic complexes of the type [MII(Fedtc)2] (M = Ni and Pd). The characterization of the compounds involved the determination of melting point, FTIR, UV-Vis, 1H NMR, elemental analysis and electrochemical experiments. Furthermore, the crystalline structures of HFedtc and [NiII(Fedtc)2] were determined by single crystal X-ray diffraction. The compounds were evaluated against the intracellular form of Trypanosoma cruzi (Tulahuen Lac-Z strain) and the cytotoxicity assays were assessed using LLC-MK2 cells. The results showed that the coordination of HFedtc to Ni(II) or Pd(II) decreases the in vitro trypanocidal activity while the cytotoxicity against LLC-MK2 cells does not change significantly. [PdII(Fedtc)2] showed the greater potential between the two complexes studied, showing an SI value of 8.9. However, this value is not better than that of the free ligand with an SI of 40, a similar value to that of the standard drug benznidazole (SI = 48). Additionally, molecular docking simulations were performed with Trypanosoma cruzi Old Yellow Enzyme (TcOYE), which predicted that HFedtc binds to the protein, almost parallel to the flavin mononucleotide (FMN) prosthetic group, while the [NiII(Fedtc)2] complex was docked into the enzyme binding site in a significantly different manner. In order to confirm the hypothetical interaction, in vitro experiments of fluorescence quenching and enzymatic activity were performed which indicated that, although HFedtc was not processed by the enzyme, it was able to act as a competitive inhibitor, blocking the hydride transfer from the FMN prosthetic group of the enzyme to the menadione substrate.
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Affiliation(s)
- Zumira A Carneiro
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto - FCFRP-USP, Universidade de São Paulo, Avenida do Café s/n, 14040-903, Ribeirão Preto, SP, Brazil
| | - Jackelinne C Lima
- Núcleo de Desenvolvimento de Compostos Bioativos (NDCBio), Universidade Federal do Triângulo Mineiro, Av. Dr. Randolfo Borges 1400, 38025-440, Uberaba, MG, Brazil
| | - Carla D Lopes
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto - FCFRP-USP, Universidade de São Paulo, Avenida do Café s/n, 14040-903, Ribeirão Preto, SP, Brazil
| | - Ana P S Gaspari
- Instituto Federal do Paraná - Campus Paranavaí, Av. José Felipe Tequinha, 1400, 87703-536, Paranavaí, PR, Brazil
| | - Sergio de Albuquerque
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto - FCFRP-USP, Universidade de São Paulo, Avenida do Café s/n, 14040-903, Ribeirão Preto, SP, Brazil
| | - Luis R Dinelli
- Faculdade de Ciências Integrada do Pontal, Universidade Federal de Uberlândia, Rua vinte, 1600, 38304-402, Ituiutaba, MG, Brazil
| | - Laudimir L W Veloso-Silva
- São Carlos Institute of Chemistry, University of São Paulo, São Carlos, SP, P.O. Box 780, 13560-970, Brazil
| | - Marcella O Paganelli
- São Carlos Institute of Chemistry, University of São Paulo, São Carlos, SP, P.O. Box 780, 13560-970, Brazil
| | - Silvia H Libardi
- São Carlos Institute of Chemistry, University of São Paulo, São Carlos, SP, P.O. Box 780, 13560-970, Brazil
| | - Carolina G Oliveira
- Instituto de Química, Universidade Federal de Uberlândia, Av. João Naves de Ávila 2121, 38400-902, Uberlândia, MG, Brazil
| | - Victor M Deflon
- São Carlos Institute of Chemistry, University of São Paulo, São Carlos, SP, P.O. Box 780, 13560-970, Brazil
| | - Ronaldo J Oliveira
- Núcleo de Desenvolvimento de Compostos Bioativos (NDCBio), Universidade Federal do Triângulo Mineiro, Av. Dr. Randolfo Borges 1400, 38025-440, Uberaba, MG, Brazil
| | - Júlio C Borges
- São Carlos Institute of Chemistry, University of São Paulo, São Carlos, SP, P.O. Box 780, 13560-970, Brazil
| | - Pedro I S Maia
- Núcleo de Desenvolvimento de Compostos Bioativos (NDCBio), Universidade Federal do Triângulo Mineiro, Av. Dr. Randolfo Borges 1400, 38025-440, Uberaba, MG, Brazil.
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8
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Nguyen C, Young JT, Slade GG, Oliveira RJ, McCully ME. A Dynamic Hydrophobic Core and Surface Salt Bridges Thermostabilize a Designed Three-Helix Bundle. Biophys J 2019; 116:621-632. [PMID: 30704856 PMCID: PMC6382955 DOI: 10.1016/j.bpj.2019.01.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [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: 10/04/2018] [Revised: 12/18/2018] [Accepted: 01/02/2019] [Indexed: 11/24/2022] Open
Abstract
Thermostable proteins are advantageous in industrial applications, as pharmaceuticals or biosensors, and as templates for directed evolution. As protein-design methodologies improve, bioengineers are able to design proteins to perform a desired function. Although many rationally designed proteins end up being thermostable, how to intentionally design de novo, thermostable proteins is less clear. UVF is a de novo-designed protein based on the backbone structure of the Engrailed homeodomain (EnHD) and is highly thermostable (Tm > 99°C vs. 52°C for EnHD). Although most proteins generally have polar amino acids on their surfaces and hydrophobic amino acids buried in their cores, protein engineers followed this rule exactly when designing UVF. To investigate the contributions of the fully hydrophobic core versus the fully polar surface to UVF’s thermostability, we built two hybrid, chimeric proteins combining the sets of buried and surface residues from UVF and EnHD. Here, we determined a structural, dynamic, and thermodynamic explanation for UVF’s thermostability by performing 4 μs of all-atom, explicit-solvent molecular dynamics simulations at 25 and 100°C, Tanford-Kirkwood solvent accessibility Monte Carlo electrostatic calculations, and a thermodynamic analysis of 40 temperature runs by the weighted-histogram analysis method of heavy-atom, structure-based models of UVF, EnHD, and both chimeric proteins. Our models showed that UVF was highly dynamic because of its fully hydrophobic core, leading to a smaller loss of entropy upon folding. The charged residues on its surface made favorable electrostatic interactions that contributed enthalpically to its thermostability. In the chimeric proteins, both the hydrophobic core and charged surface independently imparted thermostability.
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Affiliation(s)
- Catrina Nguyen
- Department of Biology, Santa Clara University, Santa Clara, California
| | - Jennifer T Young
- Department of Biology, Santa Clara University, Santa Clara, California
| | - Gabriel G Slade
- Laboratório de Biofísica Teórica, Departamento de Física, Instituto de Ciências Exatas, Naturais e Educação, Universidade Federal do Triângulo Mineiro, Uberaba, Minas Gerais, Brazil
| | - Ronaldo J Oliveira
- Laboratório de Biofísica Teórica, Departamento de Física, Instituto de Ciências Exatas, Naturais e Educação, Universidade Federal do Triângulo Mineiro, Uberaba, Minas Gerais, Brazil
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9
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Gonçalves AC, Carneiro ZA, Oliveira CG, Danuello A, Guerra W, Oliveira RJ, Ferreira FB, Veloso-Silva LL, Batista FA, Borges JC, de Albuquerque S, Deflon VM, Maia PI. Pt II , Pd II and Au III complexes with a thiosemicarbazone derived from diacethylmonooxime: Structural analysis, trypanocidal activity, cytotoxicity and first insight into the antiparasitic mechanism of action. Eur J Med Chem 2017; 141:615-631. [DOI: 10.1016/j.ejmech.2017.10.013] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Revised: 09/19/2017] [Accepted: 10/07/2017] [Indexed: 11/28/2022]
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10
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Limeiras SMA, Ogo FM, Genez LAL, Carreira CM, Oliveira EJT, Pessatto LR, Neves SC, Pesarini JR, Schweich LC, Silva RA, Cantero WB, Antoniolli-Silva ACMB, Oliveira RJ. Prevention of DNA damage and anticarcinogenic activity of Activia ® in a preclinical model. Genet Mol Res 2017; 16:gmr-16-01-gmr.16019492. [PMID: 28340269 DOI: 10.4238/gmr16019492] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Colorectal cancer is a global public health issue. Studies have pointed to the protective effect of probiotics on colorectal carcinogenesis. Activia® is a lacto probiotic product that is widely consumed all over the world and its beneficial properties are related, mainly, to the lineage of traditional yoghurt bacteria combined with a specific bacillus, DanRegularis, which gives the product a proven capacity to intestinal regulation in humans. The aim of this study was to evaluate the antigenotoxic, antimutagenic, and anticarcinogenic proprieties of the Activia product, in response to damage caused by 1,2-dimethylhydrazine (DMH) in Swiss mice. Activia does not have shown antigenotoxic activity. However, the percent of DNA damage reduction, evaluated by the antimutagenicity assay, ranged from 69.23 to 96.15% indicating effective chemopreventive action. Activia reduced up to 79.82% the induction of aberrant crypt foci by DMH. Facing the results, it is inferred that Activia facilitates the weight loss, prevents DNA damage and pre-cancerous lesions in the intestinal mucosa.
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Affiliation(s)
- S M A Limeiras
- Centro de Estudos em Células Tronco, Terapia Celular e Genética Toxicológica, Hospital Universitário "Maria Aparecida Pedrossian", Empresa Brasileira de Serviços Hospitalares, Campo Grande, MS, Brasil.,Programa de Pós-Graduação em Saúde e Desenvolvimento na Região Centro-Oeste, Faculdade de Medicina, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil.,Centro de Estudos em Nutrição e Genética Toxicológica, Centro Universitário Filadélfia, Londrina, PR, Brasil
| | - F M Ogo
- Centro de Estudos em Nutrição e Genética Toxicológica, Centro Universitário Filadélfia, Londrina, PR, Brasil
| | - L A L Genez
- Centro de Estudos em Nutrição e Genética Toxicológica, Centro Universitário Filadélfia, Londrina, PR, Brasil
| | - C M Carreira
- Centro de Ciências da Saúde, Universidade Estadual de Londrina, Londrina, PR, Brasil
| | - E J T Oliveira
- Centro de Estudos em Células Tronco, Terapia Celular e Genética Toxicológica, Hospital Universitário "Maria Aparecida Pedrossian", Empresa Brasileira de Serviços Hospitalares, Campo Grande, MS, Brasil
| | - L R Pessatto
- Centro de Estudos em Células Tronco, Terapia Celular e Genética Toxicológica, Hospital Universitário "Maria Aparecida Pedrossian", Empresa Brasileira de Serviços Hospitalares, Campo Grande, MS, Brasil.,Programa de Pós-Graduação em Farmácia, Centro de Ciências Biológicas e da Saúde, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
| | - S C Neves
- Centro de Estudos em Células Tronco, Terapia Celular e Genética Toxicológica, Hospital Universitário "Maria Aparecida Pedrossian", Empresa Brasileira de Serviços Hospitalares, Campo Grande, MS, Brasil.,Programa de Pós-Graduação em Farmácia, Centro de Ciências Biológicas e da Saúde, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
| | - J R Pesarini
- Centro de Estudos em Células Tronco, Terapia Celular e Genética Toxicológica, Hospital Universitário "Maria Aparecida Pedrossian", Empresa Brasileira de Serviços Hospitalares, Campo Grande, MS, Brasil.,Programa de Pós-Graduação em Saúde e Desenvolvimento na Região Centro-Oeste, Faculdade de Medicina, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil.,Centro de Estudos em Nutrição e Genética Toxicológica, Centro Universitário Filadélfia, Londrina, PR, Brasil
| | - L C Schweich
- Centro de Estudos em Células Tronco, Terapia Celular e Genética Toxicológica, Hospital Universitário "Maria Aparecida Pedrossian", Empresa Brasileira de Serviços Hospitalares, Campo Grande, MS, Brasil.,Programa de Pós-Graduação em Saúde e Desenvolvimento na Região Centro-Oeste, Faculdade de Medicina, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
| | - R A Silva
- Centro de Estudos em Células Tronco, Terapia Celular e Genética Toxicológica, Hospital Universitário "Maria Aparecida Pedrossian", Empresa Brasileira de Serviços Hospitalares, Campo Grande, MS, Brasil.,Programa de Pós-Graduação em Saúde e Desenvolvimento na Região Centro-Oeste, Faculdade de Medicina, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
| | - W B Cantero
- Centro de Estudos em Células Tronco, Terapia Celular e Genética Toxicológica, Hospital Universitário "Maria Aparecida Pedrossian", Empresa Brasileira de Serviços Hospitalares, Campo Grande, MS, Brasil.,Programa de Pós-Graduação em Saúde e Desenvolvimento na Região Centro-Oeste, Faculdade de Medicina, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
| | - A C M B Antoniolli-Silva
- Centro de Estudos em Células Tronco, Terapia Celular e Genética Toxicológica, Hospital Universitário "Maria Aparecida Pedrossian", Empresa Brasileira de Serviços Hospitalares, Campo Grande, MS, Brasil.,Programa de Pós-Graduação em Saúde e Desenvolvimento na Região Centro-Oeste, Faculdade de Medicina, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
| | - R J Oliveira
- Centro de Estudos em Células Tronco, Terapia Celular e Genética Toxicológica, Hospital Universitário "Maria Aparecida Pedrossian", Empresa Brasileira de Serviços Hospitalares, Campo Grande, MS, Brasil .,Programa de Pós-Graduação em Saúde e Desenvolvimento na Região Centro-Oeste, Faculdade de Medicina, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil .,Programa de Pós-Graduação em Farmácia, Centro de Ciências Biológicas e da Saúde, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
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11
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Oliveira RJ, de David N, Pesarini JR, Nogueira TD, Kassuya CAL, Strapasson RLB, Stefanello MEA, Monreal ACD, Matuo R, Antoniolli-Silva ACMB. Moquiniastrum polymorphum subsp floccosum extract: screening for mutagenic and antimutagenic activity. Genet Mol Res 2016; 15:gmr-15-gmr15048976. [PMID: 27813611 DOI: 10.4238/gmr15048976] [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: 11/03/2022]
Abstract
Moquiniastrum polymorphum subsp floccosum (Cabrera) G. Sancho is used in traditional Brazilian medicine to treat inflammation and infection, which is supported by scientific data. However, only one study has been conducted on the mutagenic activity of the extract, which has important safety implications. This study evaluated the mutagenic/antimutagenic activity of M. polymorphum ethanolic extract (MPEE) in Allium cepa meristematic cells. Commercial A. cepa seeds were cultured for 120 h. Treatments were performed for 48 h with MPEE (10 mg/mL), methyl methanesulfonate (MMS; 0.01 mg/mL), or in combination (MPEE + MMS). All of the experiments were performed in triplicate. A total of 15,000 cells per treatment were analyzed for chromosomal aberrations and the mitotic index. The results showed that MPEE was not mutagenic. In combination with MMS, MPEE decreased the number of damaged cells and the mitotic index. Interestingly, the most pronounced effect was observed post-treatment when the mitotic index also decreased, suggesting that MPEE may affect the cell cycle. MPEE exhibited antimutagenic activity, and may induce cell cycle arrest in A. cepa.
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Affiliation(s)
- R J Oliveira
- Centro de Estudos em Células Tronco, Terapia Celular e Genética Toxicológica, Hospital Universitário "Maria Aparecida Pedrossian", Empresa Brasileira de Serviços Hospitalares, Campo Grande, MS, Brasil .,Programa de Mestrado em Farmácia, Centro de Ciências Biológicas e da Saúde, Universidade Federal de Mato Grosso do Sul, MS, Brasil .,Programa de Pós-Graduação em Saúde e Desenvolvimento na Região Centro-Oeste, Faculdade de Medicina "Dr. Hélio Mandetta", Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
| | - N de David
- Centro de Estudos em Células Tronco, Terapia Celular e Genética Toxicológica, Hospital Universitário "Maria Aparecida Pedrossian", Empresa Brasileira de Serviços Hospitalares, Campo Grande, MS, Brasil.,Programa de Mestrado em Farmácia, Centro de Ciências Biológicas e da Saúde, Universidade Federal de Mato Grosso do Sul, MS, Brasil
| | - J R Pesarini
- Centro de Estudos em Células Tronco, Terapia Celular e Genética Toxicológica, Hospital Universitário "Maria Aparecida Pedrossian", Empresa Brasileira de Serviços Hospitalares, Campo Grande, MS, Brasil.,Programa de Pós-Graduação em Saúde e Desenvolvimento na Região Centro-Oeste, Faculdade de Medicina "Dr. Hélio Mandetta", Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
| | - T D Nogueira
- Centro de Estudos em Células Tronco, Terapia Celular e Genética Toxicológica, Hospital Universitário "Maria Aparecida Pedrossian", Empresa Brasileira de Serviços Hospitalares, Campo Grande, MS, Brasil.,Programa de Pós-Graduação em Ciência e Tecnologia Ambiental, Universidade Federal da Grande Dourados, Dourados, MS, Brasil
| | - C A L Kassuya
- Faculdade de Ciências da Saúde, Universidade Federal da Grande Dourados, Dourados, MS, Brasil
| | - R L B Strapasson
- Departamento de Química, Universidade Federal do Paraná, Curitiba, PR, Brasil
| | - M E A Stefanello
- Departamento de Química, Universidade Federal do Paraná, Curitiba, PR, Brasil
| | - A C D Monreal
- Programa de Mestrado em Farmácia, Centro de Ciências Biológicas e da Saúde, Universidade Federal de Mato Grosso do Sul, MS, Brasil
| | - R Matuo
- Centro de Ciências Biológicas e da Saúde, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
| | - A C M B Antoniolli-Silva
- Centro de Estudos em Células Tronco, Terapia Celular e Genética Toxicológica, Hospital Universitário "Maria Aparecida Pedrossian", Empresa Brasileira de Serviços Hospitalares, Campo Grande, MS, Brasil.,Programa de Pós-Graduação em Saúde e Desenvolvimento na Região Centro-Oeste, Faculdade de Medicina "Dr. Hélio Mandetta", Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
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12
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Hermeto LC, DeRossi R, Oliveira RJ, Pesarini JR, Antoniolli-Silva ACMB, Jardim PHA, Santana AE, Deffune E, Rinaldi JC, Justulin LA. Effects of intra-articular injection of mesenchymal stem cells associated with platelet-rich plasma in a rabbit model of osteoarthritis. Genet Mol Res 2016; 15:gmr8569. [PMID: 27706690 DOI: 10.4238/gmr.15038569] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The current study aims to evaluate the macroscopic and histological effects of autologous mesenchymal stem cells (MSC) and platelet-rich plasma on knee articular cartilage regeneration in an experimental model of osteoarthritis. Twenty-four rabbits were randomly divided into four groups: control group, platelet-rich plasma group, autologous MSC undifferentiated group, and autologous MSC differentiated into chondrocyte group. Collagenase solution was used to induce osteoarthritis, and treatments were applied to each group at 6 weeks following osteoarthritis induction. After 60 days of therapy, the animals were euthanized and the articular surfaces were subjected to macroscopic and histological evaluations. The adipogenic, chondrogenic, and osteogenic differentiation potentials of MSCs were evaluated. Macroscopic and histological examinations revealed improved tissue repair in the MSC-treated groups. However, no difference was found between MSC-differentiated and undifferentiated chondrocytes. We found that MSCs derived from adipose tissue and platelet-rich plasma were associated with beneficial effects in articular cartilage regeneration during experimental osteoarthritis.
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Affiliation(s)
- L C Hermeto
- Programa de Pós-Graduação em Ciências Veterinárias, Faculdade de Medicina Veterinária e Zootecnia, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
| | - R DeRossi
- Faculdade de Medicina Veterinária e Zootecnia, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
| | - R J Oliveira
- Centro de Estudos em Células Tronco, Terapia Celular e Genética Toxicológica, Hospital Universitário "Maria Aparecida Pedrossian", Empresa Brasileira de Serviços Hospitalares, Campo Grande, MS, Brasil .,Programa de Pós-Graduação em Saúde e Desenvolvimento na Região Centro-Oeste, Faculdade de Medicina, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil .,Programa de Mestrado em Farmácia, Centro de Ciências Biológicas e da Saúde, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
| | - J R Pesarini
- Centro de Estudos em Células Tronco, Terapia Celular e Genética Toxicológica, Hospital Universitário "Maria Aparecida Pedrossian", Empresa Brasileira de Serviços Hospitalares, Campo Grande, MS, Brasil.,Programa de Pós-Graduação em Saúde e Desenvolvimento na Região Centro-Oeste, Faculdade de Medicina, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
| | - A C M B Antoniolli-Silva
- Centro de Estudos em Células Tronco, Terapia Celular e Genética Toxicológica, Hospital Universitário "Maria Aparecida Pedrossian", Empresa Brasileira de Serviços Hospitalares, Campo Grande, MS, Brasil.,Programa de Pós-Graduação em Saúde e Desenvolvimento na Região Centro-Oeste, Faculdade de Medicina, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
| | - P H A Jardim
- Faculdade de Medicina Veterinária e Zootecnia, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
| | - A E Santana
- Departamento de Clínica e Cirurgia Veterinária, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista "Júlio de Mesquita Filho", Jaboticabal, SP, Brasil
| | - E Deffune
- Laboratório de Engenharia Celular, Faculdade de Medicina de Botucatu, Universidade Estadual Paulista "Julio de Mesquita Filho", Botucatu, SP, Brasil
| | - J C Rinaldi
- Instituto de Biociências, Departamento de Morfologia, Laboratório de Matriz Extra-Celular, Universidade Estadual Paulista "Julio de Mesquita Filho", Botucatu, SP, Brasil
| | - L A Justulin
- Instituto de Biociências, Departamento de Morfologia, Laboratório de Matriz Extra-Celular, Universidade Estadual Paulista "Julio de Mesquita Filho", Botucatu, SP, Brasil
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13
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Coelho HRS, Berno CR, Falcão GR, Hildebrand CR, Oliveira RJ, Antoniolli-Silva ACMB. Twisting of the spermatic cord: ischemia and reperfusion, toxicogenetic evaluation, and the effects of phosphatidylcholine in pre-clinical trials. Genet Mol Res 2016; 15:gmr8529. [PMID: 27706645 DOI: 10.4238/gmr.15038529] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Phosphatidylcholine is the main phospholipid present in cell membranes and in lipoproteins, and can interfere with various biological processes. This lipid also has antioxidant activity, and protects against damage caused by free radicals under conditions of ischemia/reperfusion. Therefore, the present study was designed to evaluate toxicogenetic damage caused by twisting of the spermatic cord in ischemia/reperfusion, and whether phosphatidylcholine plays a role in conditions of ischemia/reperfusion in preclinical trials. The results indicate that spermatic cord torsion does not cause genotoxic damage or mutagenesis. A dose of 300 mg/kg of phosphatidylcholine is toxic and is thus not recommended. However, a dose of 150 mg/kg does not promote toxicogenetic damage, and though it does not statistically prevent tissue damage occurring from lack of oxygenation and nutrition of testicular cells, it has a tendency to reduce this damage. Therefore, this research suggests that further studies should be conducted to clarify this tendency and to provide a better explanation of the possible therapeutic effects of phosphatidylcholine in cytoprotection of germ cells affected by ischemia/reperfusion.
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Affiliation(s)
- H R S Coelho
- Centro de Estudos em Células Tronco, Terapia Celular e Genética Toxicológica, Hospital Universitário "Maria Aparecida Pedrossian", Empresa Brasileira de Serviços Hospitalares, Campo Grande, MS, Brasil.,Programa de Pós-graduação em Saúde e Desenvolvimento na Região Centro-Oeste, Faculdade de Medicina, Universidade Federal de Mato Grosso do Sul, MS, Brasil
| | - C R Berno
- Centro de Estudos em Células Tronco, Terapia Celular e Genética Toxicológica, Hospital Universitário "Maria Aparecida Pedrossian", Empresa Brasileira de Serviços Hospitalares, Campo Grande, MS, Brasil.,Programa de Mestrado em Farmácia, Centro de Ciências Biológicas e da Saúde, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
| | - G R Falcão
- Faculdade de Medicina, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
| | - C R Hildebrand
- Centro de Estudos em Células Tronco, Terapia Celular e Genética Toxicológica, Hospital Universitário "Maria Aparecida Pedrossian", Empresa Brasileira de Serviços Hospitalares, Campo Grande, MS, Brasil
| | - R J Oliveira
- Centro de Estudos em Células Tronco, Terapia Celular e Genética Toxicológica, Hospital Universitário "Maria Aparecida Pedrossian", Empresa Brasileira de Serviços Hospitalares, Campo Grande, MS, Brasil.,Programa de Pós-graduação em Saúde e Desenvolvimento na Região Centro-Oeste, Faculdade de Medicina, Universidade Federal de Mato Grosso do Sul, MS, Brasil.,Programa de Mestrado em Farmácia, Centro de Ciências Biológicas e da Saúde, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
| | - A C M B Antoniolli-Silva
- Centro de Estudos em Células Tronco, Terapia Celular e Genética Toxicológica, Hospital Universitário "Maria Aparecida Pedrossian", Empresa Brasileira de Serviços Hospitalares, Campo Grande, MS, Brasil .,Programa de Pós-graduação em Saúde e Desenvolvimento na Região Centro-Oeste, Faculdade de Medicina, Universidade Federal de Mato Grosso do Sul, MS, Brasil
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14
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Abstract
This study was designed to evaluate the maternal toxicity and teratogenicity of fenproporex, one of the most widelyused anorectic drugs in many countries, including Brazil. Three periods of exposure were evaluated: (a) 30 days before mating; (b) from gestational day (GD) 0 to 14; and (c) 30 days before mating and during pregnancy, until GD 14. Female mice from experimental groups received, by gavage, 15 mg/kg of fenproporex. Treatment with fenproporex increased ambulation of dams in the open field test and did not influence the mobility in the forcedswimming test. There was no significant difference in maternal weight gain between the controls and fenproporex-treated groups, although fenproporex treatment reduced the gravid uterus weight. No significant difference was observed in postimplantation loss, fetal viability and sex ratio. In addition, this compound did not impair intra-uterine growth. The reduction in the number of implantations in the groups receiving fenproporex indicates that this drug may have an adverse effect on implantation. Fenproporex treatment also increased the number of fetuses presenting small kidneys and cervical ribs. The present results indicate that fenproporex, in the dose and exposure periods tested, appears to exhibit a low maternal toxicity and teratogenic potential in mice.
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Affiliation(s)
- C Q Moreira
- Department of Biology, Center of Biological Sciences, Londrina State University, Londrina, PR, Brazil
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15
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Martello MD, David N, Matuo R, Carvalho PC, Navarro SD, Monreal ACD, Cunha-Laura AL, Cardoso CAL, Kassuya CAL, Oliveira RJ. Campomanesia adamantium extract induces DNA damage, apoptosis, and affects cyclophosphamide metabolism. Genet Mol Res 2016; 15:gmr7678. [PMID: 27173259 DOI: 10.4238/gmr.15027678] [Citation(s) in RCA: 7] [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: 11/03/2022]
Abstract
Campomanesia adamantium (Cambess.) O. Berg. is originally from Brazil. Its leaves and fruits have medicinal properties such as anti-inflammatory, antidiarrheal and antiseptic properties. However, the mutagenic potential of this species has been reported in few studies. This study describes the mutagenic/antimutagenic, splenic phagocytic, and apoptotic activities of C. adamantium hydroethanolic extract with or without cyclophosphamide in Swiss mice. The animals orally received the hydroethanolic extract at doses of 30, 100, or 300 mg/kg with or without 100 mg/kg cyclophosphamide. Mutagenesis was evaluated by performing the micronucleus assay after treatment for 24, 48, and 72 h, while splenic phagocytic and apoptotic effects were investigated after 72 h. Short-term exposure of 30 and 100 mg/kg extract induced mild clastogenic/aneugenic effects and increased splenic phagocytosis and apoptosis in the liver, spleen, and kidneys. When the extract was administered in combination with cyclophosphamide, micronucleus frequency and apoptosis reduced. Extract components might affect cyclophosphamide metabolism, which possibly leads to increased clearance of this chemotherapeutic agent. C. adamantium showed mutagenic activity and it may decrease the effectiveness of drugs with metabolic pathways similar to those associated with cyclophosphamide. Thus, caution should be exercised while consuming these extracts, especially when received in combination with other drugs.
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Affiliation(s)
- M D Martello
- Centro de Células Tronco, Terapia Celular e Genética Toxicológica, Hospital Universitário "Maria Aparecida Pedrossian", EBSERH, Campo Grande, MS, Brasil.,Programa de Mestrado em Farmácia, Centro de Ciências Biológicas e da Saúde, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
| | - N David
- Centro de Células Tronco, Terapia Celular e Genética Toxicológica, Hospital Universitário "Maria Aparecida Pedrossian", EBSERH, Campo Grande, MS, Brasil.,Programa de Mestrado em Farmácia, Centro de Ciências Biológicas e da Saúde, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
| | - R Matuo
- Programa de Mestrado em Farmácia, Centro de Ciências Biológicas e da Saúde, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
| | - P C Carvalho
- Centro de Células Tronco, Terapia Celular e Genética Toxicológica, Hospital Universitário "Maria Aparecida Pedrossian", EBSERH, Campo Grande, MS, Brasil.,Programa de Pós-Graduação em Saúde e Desenvolvimento da Região Centro-Oeste, Faculdade de Medicina Dr. Hélio Mandetta, Campo Grande, MS, Brasil
| | - S D Navarro
- Programa de Pós-Graduação em Biotecnologia e Biodiversidade, Rede Pró-Centro-Oeste, Instituto de Química
| | - A C D Monreal
- Programa de Mestrado em Farmácia, Centro de Ciências Biológicas e da Saúde, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
| | - A L Cunha-Laura
- Programa de Mestrado em Farmácia, Centro de Ciências Biológicas e da Saúde, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
| | - C A L Cardoso
- Curso de Graduação em Química, Universidade Estadual de Mato Grosso do Sul, Dourados, MS, Brasil
| | - C A L Kassuya
- Curso de Ciências da Saúde, Universidade Federal da Grande Dourados, Dourados, MS, Brasil
| | - R J Oliveira
- Centro de Células Tronco, Terapia Celular e Genética Toxicológica, Hospital Universitário "Maria Aparecida Pedrossian", EBSERH, Campo Grande, MS, Brasil.,Programa de Mestrado em Farmácia, Centro de Ciências Biológicas e da Saúde, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil.,Programa de Pós-Graduação em Saúde e Desenvolvimento da Região Centro-Oeste, Faculdade de Medicina Dr. Hélio Mandetta, Campo Grande, MS, Brasil
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16
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Almeida KG, Oliveira RJ, Dourado DM, Filho EA, Fernandes WS, Souza AS, Araújo FHS. Morphological study of rat skin flaps treated with subcutaneous dimethyl sulfoxide combined with hyperbaric oxygen therapy. Genet Mol Res 2015; 14:18160-71. [PMID: 26782463 DOI: 10.4238/2015.december.23.3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
This study investigated the effects of hyperbaric oxygen therapy (HBOT) and dimethyl sulfoxide (DMSO) in tissue necrosis, genotoxicity, and cell apoptosis. Random skin flaps were made in 50 male Wistar rats, randomly divided into the following groups. Control group (CT), wherein a rectangular skin section (2 x 8 cm) was dissected from the dorsal muscle layer, preserving the cranial vessels, lifted, and refixed to the bed; distilled water (DW) group, in which DW was injected into the distal half of the skin flap; DMSO group, wherein 5% DMSO was injected; HBOT group, comprising animals treated only with HBOT; and HBOT + DMSO group, comprising animals treated with 100% oxygen at 2.5 atmospheres absolute for 1 h, 2 h after the experiment, daily for 10 consecutive days. A skinflap specimen investigated by microscopy. The percentage of necrosis was not significantly different between groups. The cell viability index was significantly different between groups (P < 0.001): 87.40% (CT), 86.20% (DW), 84.60% (DMSO), 86.60% (DMSO + HBO), and 91% (HBO) (P < 0.001), as was the cell apoptosis index of 12.60 (CT), 12.00 (DW), 15.40 (DMSO), 9.00 (HBO), and 12.00 (DMSO + HBO) (P < 0.001). The genotoxicity test revealed the percentage of cells with DNA damage to be 22.80 (CT), 22.60 (DW), 26.00 (DMSO), 8.80 (DMSO + HBO), and 7.20 (HBO) (P < 0.001). Although the necrotic area was not different between groups, there was a significant reduction in the cellular DNA damage and apoptosis index in the HBOT group.
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Affiliation(s)
- K G Almeida
- Programa de Pós-Graduação em Saúde e Desenvolvimento na Região Centro-Oeste, Faculdade de Medicina, Universidade Federal do Mato Grosso do Sul, Campo Grande, MS, Brasil
| | - R J Oliveira
- Centro de Estudos em Células Tronco, Terapia Celular e Genética Toxicológica, Núcleo do Hospital Universitário, Universidade Aberta do Brasil
| | - D M Dourado
- Universidade Anhanguera, Campo Grande, MS, Brasil
| | - E A Filho
- Serviço de Cirurgia Plástica da Santa Casa de Misericórdia de Campo Grande, Campo Grande, MS, Brasil
| | - W S Fernandes
- Programa de Pós-Graduação em Doenças Infecciosas e Parasitárias, Laboratório de Parasitologia Humana, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
| | - A S Souza
- Programa de Pós-Graduação em Saúde e Desenvolvimento na Região Centro-Oeste, Faculdade de Medicina, Universidade Federal do Mato Grosso do Sul, Campo Grande, MS, Brasil
| | - F H S Araújo
- Programa de Pós-graduação em Farmácia, Universidade Federal do Mato Grosso do Sul, Campo Grande, MS, Brasil
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17
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Vieira CA, Battaglini CL, Ferreira-Junior JB, Vieira A, Brito Vogt MF, Freitas-Junior R, Oliveira RJ, Bottaro M. Effects of Rest Interval on Strength Recovery in Breast Cancer Survivors. Int J Sports Med 2015; 36:573-8. [PMID: 25781872 DOI: 10.1055/s-0034-1398579] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
The purpose of this study was to compare the acute effect of 2 different resting intervals (RI) between sets of isokinetic knee extension exercise on peak torque (PT) and total work (TW) in breast cancer survivors (BCS) and control group (CNT). 16 BCS (52±4 years) and 14 CNT (53±6 years) performed 3 sets of 10 unilateral isokinetic knee extension repetitions at 60°.s(- 1) on 2 separate days with 2 different RI between sets (1 and 2 min). There was a significant interaction between groups vs. exercise sets (p=0.03) and RI vs. exercise sets (p<0.001) for PT. PT was greater in CNT at 1(st) and 2(nd) sets compared to BCS group (CNT, 133.4±20.8 and BCS 107.6±19.9 Nm, p=0.012 and CNT, 118.9±19.6 and BCS, 97.1±15.9 Nm, p=0.045, respectively). The TW of the knee extensor was significant greater in CNT than BCS group for all 3 knee extension exercise sets. In conclusion, the present study suggests that Breast Cancer Survivors women may need a longer rest interval (longer than 2 min) to be able to fully recover during a 3 sets of isokinetic knee extension exercise training session.
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Affiliation(s)
- C A Vieira
- College of Physical Education, Federal University of Goias, Goiania, Brazil
| | - C L Battaglini
- Department of Exercise and Sport Science and Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, United States
| | | | - A Vieira
- Medical College Federal University of Brasilia, Brazil
| | - M F Brito Vogt
- College of Physical Education, University of Brasilia, Brasilia, Brazil
| | | | - R J Oliveira
- College of Physical Education, University of Brasilia, Brasilia, Brazil
| | - M Bottaro
- College of Physical Education, University of Brasilia, Brasilia, Brazil
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18
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Navarro SD, Mauro MO, Pesarini JR, Ogo FM, Oliveira RJ. Resistant starch: a functional food that prevents DNA damage and chemical carcinogenesis. Genet Mol Res 2015; 14:1679-91. [PMID: 25867310 DOI: 10.4238/2015.march.6.14] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Resistant starch is formed from starch and its degradation products and is not digested or absorbed in the intestine; thus, it is characterized as a fiber. Because fiber intake is associated with the prevention of DNA damage and cancer, the potential antigenotoxic, antimutagenic, and anticarcinogenic capabilities of resistant starch from green banana flour were evaluated. Animals were treated with 1,2-dimethylhydrazine and their diet was supplemented with 10% green banana flour according to the following resistant starch protocols: pretreatment, simultaneous treatment, post-treatment, and pre + continuous treatment. The results demonstrated that resistant starch is not genotoxic, mutagenic, or carcinogenic. The results suggest that resistant starch acts through desmutagenesis and bio-antimutagenesis, as well as by reducing aberrant crypt foci, thereby improving disease prognosis. These findings imply that green banana flour has therapeutic properties that should be explored for human dietary applications.
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Affiliation(s)
- S D Navarro
- Centro de Estudos em Células Tronco, Terapia Celular e Genética Toxicológica-CeTroGen, Núcleo de Hospital Universitário, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
| | - M O Mauro
- Centro de Estudos em Células Tronco, Terapia Celular e Genética Toxicológica-CeTroGen, Núcleo de Hospital Universitário, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
| | - J R Pesarini
- Centro de Estudos em Células Tronco, Terapia Celular e Genética Toxicológica-CeTroGen, Núcleo de Hospital Universitário, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
| | - F M Ogo
- Centro de Ciências Biológicas, Universidade Estadual de Londrina, Londrina, PR, Brasil
| | - R J Oliveira
- Centro de Estudos em Células Tronco, Terapia Celular e Genética Toxicológica-CeTroGen, Núcleo de Hospital Universitário, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
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19
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Hermeto LC, Oliveira RJ, Matuo R, Jardim PHA, DeRossi R, Antoniolli ACMB, Deffune E, Evaristo TC, Santana ÁE. Evaluation of pH effects on genomic integrity in adipose-derived mesenchymal stem cells using the comet assay. Genet Mol Res 2015; 14:339-48. [PMID: 25729966 DOI: 10.4238/2015.january.23.7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The use of mesenchymal stem cells (MSCs) in experimental, clinical, and therapeutic trials has grown in recent years. However, the issue remains of whether these procedures are completely safe for transplant patients. Therefore, this study was designed and carried out with the aim of evaluating two different comet assay protocols for genomic damage pattern analysis in MSCs derived from adipose tissue. The analyzed and interpreted results suggest that genetic testing is needed to support clonal expansion safety in cell therapy procedures with MSCs. Furthermore, they also suggest that if the comet assay technique would be used as a genomic integrity screening assay, the protocol performed at pH = 12 (that yielded a frequency of damaged cells: tail intensity = 9.50 ± 0.60, tail moment = 0.0122 ± 0.0007; results are reported as means ± standard deviation) would be indicated as genomic damage, and that subsequent single-strand breaks occur at pH > 13 (frequency of damaged cells: tail intensity = 30.71 ± 4.23, tail moment = 0.0447 ± 0.0073). Our study demonstrates that, in the era of regenerative medicine, it is necessary to standardize and establish a battery of tests in order to identify genomic damage prior to MSC transplantation.
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Affiliation(s)
- L C Hermeto
- Programa de Pós Graduação em Cirurgia Veterinária, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, Jaboticabal, SP, Brasil
| | - R J Oliveira
- Centro de Estudos em Células-Tronco, Terapia Celular e Genética Toxicológica, Núcleo de Hospital Universitário, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
| | - R Matuo
- Centro de Estudos em Células-Tronco, Terapia Celular e Genética Toxicológica, Núcleo de Hospital Universitário, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
| | - P H A Jardim
- Departamento de Cirurgia e Anestesiologia Veterinária, Faculdade de Medicina Veterinária e Zootecnia, Universidade Federal de Mato Grosso do Sul, MS, Brasil
| | - R DeRossi
- Departamento de Cirurgia e Anestesiologia Veterinária, Faculdade de Medicina Veterinária e Zootecnia, Universidade Federal de Mato Grosso do Sul, MS, Brasil
| | - A C M B Antoniolli
- Centro de Estudos em Células-Tronco, Terapia Celular e Genética Toxicológica, Núcleo de Hospital Universitário, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
| | - E Deffune
- Laboratório de Engenharia Celular, Faculdade de Medicina de Botucatu, Universidade Estadual Paulista, Botucatu, SP, Brasil
| | - T C Evaristo
- Laboratório de Engenharia Celular, Faculdade de Medicina de Botucatu, Universidade Estadual Paulista, Botucatu, SP, Brasil
| | - Á E Santana
- Programa de Pós Graduação em Cirurgia Veterinária, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, Jaboticabal, SP, Brasil
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20
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Vieira MHC, Oliveira RJ, Eça LPM, Pereira ISO, Hermeto LC, Matuo R, Fernandes WS, Silva RA, Antoniolli ACMB. Therapeutic potential of mesenchymal stem cells to treat Achilles tendon injuries. Genet Mol Res 2014; 13:10434-49. [PMID: 25511027 DOI: 10.4238/2014.december.12.5] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Rupture of the Achilles tendon diminishes quality of life. The gold-standard therapy is a surgical suture, but this presents complications, including wound formation and inflammation. These complications spurred evaluation of the therapeutic potential of mesenchymal stem cells (MSCs) from adipose tissue. New Zealand rabbits were divided into 6 groups (three treatments with two time points each) evaluated at either 14 or 28 days after surgery: cross section of the Achilles tendon (CSAT); CSAT + Suture; and CSAT + MSC. A comparison between all groups at both time points showed a statistically significant increase in capillaries and in the structural organization of collagen in the healed tendon in the CSAT + Suture and CSAT + MSC groups at the 14-day assessment. Comparison between the two time points within the same group showed a statistically significant decrease in the inflammatory process and an increase in the structural organization of collagen in the CSAT and CSAT + MSC groups. A study of the genomic integrity of the cells suggested a linear correlation between an increase of injuries and culture time. Thus, MSC transplantation is a good alternative for treatment of Achilles tendon ruptures because it may be conducted without surgery and tendon suture and, therefore, has no risk of adverse effects resulting from the surgical wound or inflammation caused by nonabsorbable sutures. Furthermore, this alternative treatment exhibits a better capacity for wound healing and maintaining the original tendon architecture, depending on the arrangement of the collagen fibers, and has important therapeutic potential.
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Affiliation(s)
- M H C Vieira
- Centro de Estudos em Células-Tronco, Terapia Celular e Genética Toxicológica, Núcleo de Hospital Universitário, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
| | - R J Oliveira
- Centro de Estudos em Células-Tronco, Terapia Celular e Genética Toxicológica, Núcleo de Hospital Universitário, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
| | - L P M Eça
- Instituto de Pesquisas de Células-Tronco, São Paulo, SP, Brasil
| | - I S O Pereira
- Instituto de Pesquisas de Células-Tronco, São Paulo, SP, Brasil
| | - L C Hermeto
- Centro de Estudos em Células-Tronco, Terapia Celular e Genética Toxicológica, Núcleo de Hospital Universitário, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
| | - R Matuo
- Centro de Estudos em Células-Tronco, Terapia Celular e Genética Toxicológica, Núcleo de Hospital Universitário, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
| | - W S Fernandes
- Centro de Ciências Biológicas, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
| | - R A Silva
- Centro de Estudos em Células-Tronco, Terapia Celular e Genética Toxicológica, Núcleo de Hospital Universitário, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
| | - A C M B Antoniolli
- Centro de Estudos em Células-Tronco, Terapia Celular e Genética Toxicológica, Núcleo de Hospital Universitário, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
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21
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Felicidade I, Lima JD, Pesarini JR, Monreal ACD, Mantovani MS, Ribeiro LR, Oliveira RJ. Mutagenic and antimutagenic effects of aqueous extract of rosemary (Rosmarinus officinalis L.) on meristematic cells of Allium cepa. Genet Mol Res 2014; 13:9986-96. [PMID: 25501210 DOI: 10.4238/2014.november.28.3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Polyphenolic compounds present in rosemary were found to have antioxidant properties, anticarcinogenic activity, and to increase the detoxification of pro-carcinogens. The aim of the study was to determine the effect the aqueous extract of rosemary (AER) on mutagenicity induced by methylmethane sulfonate in meristematic cells of Allium cepa, as well as to describe its mode of action. Anti-mutagenicity experiments were carried out with 3 different concentrations of AER, which alone showed no mutagenic effects. In antimutagenicity experiments, AER showed chemopreventive activity in cultured meristematic cells of A. cepa against exposure to methylmethane sulfonate. Additionally, post-treatment and simultaneous treatment using pre-incubation protocols were the most effective. Evaluation of different protocols and the percent reduction in DNA indicated bioantimutagenic as well desmutagenic modes of action for AER. AER may be chemopreventive and antimutagenic.
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Affiliation(s)
- I Felicidade
- Centro de Estudos em Nutrição e Genética Toxicológica, Centro Universitário Filadélfia, Londrina, PR, Brasil
| | - J D Lima
- Centro de Estudos em Nutrição e Genética Toxicológica, Centro Universitário Filadélfia, Londrina, PR, Brasil
| | - J R Pesarini
- Centro de Estudos em Célula Tronco, Terapia Celular e Genética Toxicológica, Núcleo de Hospital Universitário, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
| | - A C D Monreal
- Centro de Ciências Biológicas e da Saúde, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
| | - M S Mantovani
- Departamento de Biologia Geral, Centro de Ciências Biológicas, Universidade Estadual de Londrina, Londrina, PR, Brasil
| | - L R Ribeiro
- Programa de Pós-Graduação em Patologia, Faculdade de Medicina, Universidade Estadual Paulista, Botucatu, SP, Brasil
| | - R J Oliveira
- Centro de Estudos em Célula Tronco, Terapia Celular e Genética Toxicológica, Núcleo de Hospital Universitário, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
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22
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Oliveira RJ, Mantovani MS, Silva AFD, Pesarini JR, Mauro MO, Ribeiro LR. Compounds used to produce cloned animals are genotoxic and mutagenic in mammalian assays in vitro and in vivo. ACTA ACUST UNITED AC 2014; 47:287-98. [PMID: 24714812 PMCID: PMC4075292 DOI: 10.1590/1414-431x20143301] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [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: 06/24/2013] [Accepted: 01/07/2014] [Indexed: 11/21/2022]
Abstract
The compounds 6-dimethylaminopurine and cycloheximide promote the successful production of cloned mammals and have been used in the development of embryos produced by somatic cell nuclear transfer. This study investigated the effects of 6-dimethylaminopurine and cycloheximide in vitro, using the thiazolyl blue tetrazolium bromide colorimetric assay to assess cytotoxicity, the trypan blue exclusion assay to assess cell viability, the comet assay to assess genotoxicity, and the micronucleus test with cytokinesis block to test mutagenicity. In addition, the comet assay and the micronucleus test were also performed on peripheral blood cells of 54 male Swiss mice, 35 g each, to assess the effects of the compounds in vivo. The results indicated that both 6-dimethylaminopurine and cycloheximide, at the concentrations and doses tested, were cytotoxic in vitro and genotoxic and mutagenic in vitro and in vivo, altered the nuclear division index in vitro, but did not diminish cell viability in vitro. Considering that alterations in DNA play important roles in mutagenesis, carcinogenesis, and morphofunctional teratogenesis and reduce embryonic viability, this study indicated that 6-dimethylaminopurine and cycloheximide utilized in the process of mammalian cloning may be responsible for the low embryo viability commonly seen in nuclear transfer after implantation in utero.
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Affiliation(s)
- R J Oliveira
- Programa de Pós-Graduação em Biologia Celular e Molecular, Instituto de Biociências de Rio Claro, Universidade Estadual Paulista, Rio Claro, SP, Brasil
| | - M S Mantovani
- Departamento de Biologia Geral, Universidade Estadual de Londrina, Londrina, PR, Brasil
| | - A F da Silva
- Departamento de Biologia Geral, Universidade Estadual de Londrina, Londrina, PR, Brasil
| | - J R Pesarini
- Centro de Estudos em Células Tronco, Terapia Celular e Genética Toxicológica, Núcleo de Hospital Universitário, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
| | - M O Mauro
- Centro de Estudos em Células Tronco, Terapia Celular e Genética Toxicológica, Núcleo de Hospital Universitário, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
| | - L R Ribeiro
- Programa de Pós-Graduação em Biologia Celular e Molecular, Instituto de Biociências de Rio Claro, Universidade Estadual Paulista, Rio Claro, SP, Brasil
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23
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Contessoto VG, Lima DT, Oliveira RJ, Bruni AT, Chahine J, Leite VBP. Analyzing the effect of homogeneous frustration in protein folding. Proteins 2013; 81:1727-37. [PMID: 23609962 DOI: 10.1002/prot.24309] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [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: 09/26/2012] [Revised: 03/13/2013] [Accepted: 03/18/2013] [Indexed: 11/09/2022]
Abstract
The energy landscape theory has been an invaluable theoretical framework in the understanding of biological processes such as protein folding, oligomerization, and functional transitions. According to the theory, the energy landscape of protein folding is funneled toward the native state, a conformational state that is consistent with the principle of minimal frustration. It has been accepted that real proteins are selected through natural evolution, satisfying the minimum frustration criterion. However, there is evidence that a low degree of frustration accelerates folding. We examined the interplay between topological and energetic protein frustration. We employed a Cα structure-based model for simulations with a controlled nonspecific energetic frustration added to the potential energy function. Thermodynamics and kinetics of a group of 19 proteins are completely characterized as a function of increasing level of energetic frustration. We observed two well-separated groups of proteins: one group where a little frustration enhances folding rates to an optimal value and another where any energetic frustration slows down folding. Protein energetic frustration regimes and their mechanisms are explained by the role of non-native contact interactions in different folding scenarios. These findings strongly correlate with the protein free-energy folding barrier and the absolute contact order parameters. These computational results are corroborated by principal component analysis and partial least square techniques. One simple theoretical model is proposed as a useful tool for experimentalists to predict the limits of improvements in real proteins.
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Affiliation(s)
- Vinícius G Contessoto
- Departamento de Física, Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista, Sao José do Rio Preto, São Paulo, 15054-000, Brazil
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24
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Mauro MO, Monreal MTFD, Silva MTP, Pesarini JR, Mantovani MS, Ribeiro LR, Dichi JB, Carreira CM, Oliveira RJ. Evaluation of the antimutagenic and anticarcinogenic effects of inulin in vivo. Genet Mol Res 2013; 12:2281-93. [PMID: 23884771 DOI: 10.4238/2013.july.8.9] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The incidence of colorectal cancer is growing worldwide. The characterization of compounds present in the human diet that can prevent the occurrence of colorectal tumors is vital. The oligosaccharide inulin is such a compound. The aim of this study was to evaluate the antigenotoxic, antimutagenic and anticarcinogenic effects of inulin in vivo. Our study is based on 3 assays that are widely used to evaluate chemoprevention (comet assay, micronucleus assay, and aberrant crypt focus assay) and tests 4 protocols of treatment with inulin (pre-treatment, simultaneous, post-treatment, and pre + continuous). Experiments were carried out in Swiss male mice of reproductive age. In order to induce DNA damage, we used the pro-carcinogenic agent 1,2-dimethylhydrazine. Inulin was administered orally at a concentration of 50 mg/kg body weight following the protocols mentioned above. Inulin was not administered to the control groups. Our data from the micronucleus assay reveal antimutagenic effects of inulin in all protocols. The percentage of inulin-induced damage reduction ranged from 47.25 to 141.75% across protocols. These data suggest that inulin could act through desmutagenic and bio-antimutagenic mechanisms. The anticarcinogenic activity (aberrant crypt focus assay) of inulin was observed in all protocols and the percentages of damage reduction ranged from 55.78 to 87.56% across protocols. Further tests, including human trials, will be necessary before this functional food can be proven to be effective in the prevention and treatment of colon cancer.
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Affiliation(s)
- M O Mauro
- Centro de Estudos em Nutrição e Genética Toxicológica, Centro Universitário Filadélfia, Londrina, PR, Brasil
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25
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Pesarini JR, Zaninetti PT, Mauro MO, Carreira CM, Dichi JB, Ribeiro LR, Mantovani MS, Oliveira RJ. Antimutagenic and anticarcinogenic effects of wheat bran in vivo. Genet Mol Res 2013; 12:1646-59. [PMID: 23765971 DOI: 10.4238/2013.may.14.5] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Previous studies in rodents treated with the pro-carcinogen 1,2-dimethylhydrazine suggested that the consumption of wheat bran protected against DNA damage in the colon and rectum. Based on this information, we evaluated wheat bran as a functional food in the prevention and treatment of colon cancer. We used the aberrant crypt focus assay to evaluate the anticarcinogenic potential of wheat bran (Triticum aestivum variety CD-104), the comet assay to evaluate its antigenotoxicity potential, and the micronucleus assay to evaluate its antimutagenic potential. The wheat bran gave good antimutagenic and anticarcinogenic responses; the DNA damage decreased from 90.30 to 26.37% and from 63.35 to 28.73%, respectively. However, the wheat bran did not significantly reduce genotoxicity. Further tests will be necessary, including tests in human beings, before this functional food can be recommended as an adjunct in the prevention and treatment of colon cancer.
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Affiliation(s)
- J R Pesarini
- Centro de Estudo em Nutrição e Genética Toxicológica, Centro Universitário Filadélfia, Londrina, PR, Brasil
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Niwa AM, Oliveira RJ, Mantovani MS. Evaluation of the mutagenicity and antimutagenicity of soy phytoestrogens using micronucleus and comet assays of the peripheral blood of mice. Genet Mol Res 2013; 12:519-27. [PMID: 23512669 DOI: 10.4238/2013.february.27.1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [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: 12/16/2023]
Abstract
Studies show that soy imparts many favorable properties in the human body, including the prevention of chronic diseases such as osteoporosis, heart disease, cancer, and diabetes. Soy is rich in isoflavones, and it is a candidate for the chemoprevention of diseases owing to its low toxicity. In this study, a soy phytoestrogen (with high levels of the isoflavones genistin and daidzein) was tested in mice to investigate its mutagenicity and genotoxicity using micronucleus and comet assays of mouse peripheral blood. Phytoestrogen (0.083, 0.83 and 8.3 mg/kg body weight) was evaluated with and without the chemotherapeutic agent cyclophosphamide. For the micronucleus assay, blood was collected before treatment and after 24 and 48 h. For the comet assay, blood was collected only after 24 h. Phytoestrogen was not mutagenic and reduced cyclophosphamide-induced DNA damage. The results from the comet assay revealed a reduction of DNA damage; however, phytoestrogen did induce genotoxic damage during the 24-h treatment. This genotoxic damage could have been repaired and was therefore not identified in the micronucleus assay, which detects mutations. The results suggested that the reduction of DNA damage observed in associated treatments could also reduce the side effects of chemotherapy. Moreover, they suggested that phytoestrogen might be a candidate of interest for the chemoprevention of cancer because it protects against DNA damage.
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Affiliation(s)
- A M Niwa
- Departamento de Biologia Geral, Universidade Estadual de Londrina, Londrina, PR, Brasil.
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Wang J, Oliveira RJ, Chu X, Whitford PC, Chahine J, Han W, Wang E, Onuchic JN, Leite VB. Topography of funneled landscapes determines the thermodynamics and kinetics of protein folding. Proc Natl Acad Sci U S A 2012; 109:15763-8. [PMID: 23019359 PMCID: PMC3465441 DOI: 10.1073/pnas.1212842109] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [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] [Indexed: 11/18/2022] Open
Abstract
The energy landscape approach has played a fundamental role in advancing our understanding of protein folding. Here, we quantify protein folding energy landscapes by exploring the underlying density of states. We identify three quantities essential for characterizing landscape topography: the stabilizing energy gap between the native and nonnative ensembles δE, the energetic roughness ΔE, and the scale of landscape measured by the entropy S. We show that the dimensionless ratio between the gap, roughness, and entropy of the system Λ=δE/(ΔE√(2S)) accurately predicts the thermodynamics, as well as the kinetics of folding. Large Λ implies that the energy gap (or landscape slope towards the native state) is dominant, leading to more funneled landscapes. We investigate the role of topological and energetic roughness for proteins of different sizes and for proteins of the same size, but with different structural topologies. The landscape topography ratio Λ is shown to be monotonically correlated with the thermodynamic stability against trapping, as characterized by the ratio of folding temperature versus trapping temperature. Furthermore, Λ also monotonically correlates with the folding kinetic rates. These results provide the quantitative bridge between the landscape topography and experimental folding measurements.
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Affiliation(s)
- Jin Wang
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences Changchun, Jilin 130012 China
- College of Physics and State Key Laboratory of Superhard Materials, Jilin University, Changchun, Jilin 130021, China
- Department of Chemistry, Physics and Applied Mathematics, State University of New York at Stony Brook, Stony Brook, NY 11794-3400
| | - Ronaldo J. Oliveira
- Departamento de Física—Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista, 15054-000 São José do Rio Preto, Brazil
- Laboratório Nacional de Ciência e Tecnologia do Bioetanol, Centro Nacional de Pesquisa em Energia e Materiais,13083-970 Campinas, SP, Brazil; and
| | - Xiakun Chu
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences Changchun, Jilin 130012 China
- College of Physics and State Key Laboratory of Superhard Materials, Jilin University, Changchun, Jilin 130021, China
| | - Paul C. Whitford
- Center for Theoretical Biological Physics, Rice University, 6100 Main, Houston, TX 77005-1827
| | - Jorge Chahine
- Departamento de Física—Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista, 15054-000 São José do Rio Preto, Brazil
| | - Wei Han
- College of Physics and State Key Laboratory of Superhard Materials, Jilin University, Changchun, Jilin 130021, China
| | - Erkang Wang
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences Changchun, Jilin 130012 China
| | - José N. Onuchic
- Center for Theoretical Biological Physics, Rice University, 6100 Main, Houston, TX 77005-1827
| | - Vitor B.P. Leite
- Departamento de Física—Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista, 15054-000 São José do Rio Preto, Brazil
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Xu W, Lai Z, Oliveira RJ, Leite VBP, Wang J. Configuration-dependent diffusion dynamics of downhill and two-state protein folding. J Phys Chem B 2012; 116:5152-9. [PMID: 22497604 DOI: 10.1021/jp212132v] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Configuration-dependent diffusion (CDD) is important for protein folding kinetics with small thermodynamic barriers. CDD can be even more crucial in downhill folding without thermodynamic barriers. We explored the CDD of a downhill protein (BBL), and a two-state protein (CI2). The hidden kinetic barriers due to CDD were revealed. The increased ~1 k(B)T kinetic barrier is in line with experimental value based on other fast folding proteins. Compared to that of CI2, the effective free-energy profile of BBL is found to be significantly influenced by CDD, and the kinetics are totally determined by diffusion. These findings are consistent with both earlier bulk and single-molecule fluorescence measurements. In addition, we found the temperature dependence of CDD. We also found that the ratio of folding transition temperature against optimal kinetic folding temperature can provide both a quantitative measure for the underlying landscape topography and an indicator for the possible appearance of downhill folding. Our study can help for a better understanding of the role of diffusion in protein folding dynamics.
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Affiliation(s)
- Weixin Xu
- Department of Chemistry, State University of New York at Stony Brook, Stony Brook, New York 11794, United States
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Abstract
This study examined the association between ACE I/D and ACTN3 R577X polymorphisms and muscle-related phenotypes and their adaptation to resistance training in older women. Volunteers (n=246;age=66.7 ± 5.5 years) underwent quadriceps strength assessment using isokinetics and fat-free mass by dual energy X-ray absorptiometry. 79 volunteers performed 24 weeks of resistance training and 75 were studied as controls. Genotypes were identified by standard procedures. No associations were observed for muscle strength for either gene, but volunteers carrying the D/D genotype presented higher appendicular fat-free mass compared to the I-allele carriers (6.3 ± 0.1 vs. 6.1 ± 0.1 kg/m (2)). The X-allele carriers presented higher relative fat-free mass when compared to homozygous R/R (16.3 ± 0.1 vs. 15.9 ± 0.1 kg/m (2)). All fat-free mass variables were significantly greater for carriers of both X/X and D/D genotypes. In response to RT, only the I-allele carriers significantly increased fat-free mass and a significant training × genotype interaction was noted. These findings do not support a pivotal role for the studied polymorphisms in determining muscle strength in older women, but suggest a modest role in fat-free mass determination. Of note, the results provide a novel insight that these genetic variations may interact to determine muscle mass in older women.
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Affiliation(s)
- R M Lima
- College of Physical Education, University of Brasília, Brasília, Brazil.
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Oliveira RJ, Whitford PC, Chahine J, Wang J, Onuchic JN, Leite VBP. The origin of nonmonotonic complex behavior and the effects of nonnative interactions on the diffusive properties of protein folding. Biophys J 2010; 99:600-8. [PMID: 20643080 DOI: 10.1016/j.bpj.2010.04.041] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [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: 11/19/2009] [Revised: 04/06/2010] [Accepted: 04/14/2010] [Indexed: 11/17/2022] Open
Abstract
We present a method for calculating the configurational-dependent diffusion coefficient of a globular protein as a function of the global folding process. Using a coarse-grained structure-based model, we determined the diffusion coefficient, in reaction coordinate space, as a function of the fraction of native contacts formed Q for the cold shock protein (TmCSP). We find nonmonotonic behavior for the diffusion coefficient, with high values for the folded and unfolded ensembles and a lower range of values in the transition state ensemble. We also characterized the folding landscape associated with an energetically frustrated variant of the model. We find that a low-level of frustration can actually stabilize the native ensemble and increase the associated diffusion coefficient. These findings can be understood from a mechanistic standpoint, in that the transition state ensemble has a more homogeneous structural content when frustration is present. Additionally, these findings are consistent with earlier calculations based on lattice models of protein folding and more recent single-molecule fluorescence measurements.
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Affiliation(s)
- Ronaldo J Oliveira
- Departamento de Física, Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista, São José do Rio Preto, Brazil
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Oliveira RJ, Whitford PC, Chahine J, Leite VBP, Wang J. Coordinate and time-dependent diffusion dynamics in protein folding. Methods 2010; 52:91-8. [PMID: 20438841 DOI: 10.1016/j.ymeth.2010.04.016] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2010] [Revised: 04/23/2010] [Accepted: 04/28/2010] [Indexed: 11/25/2022] Open
Abstract
We developed both analytical and simulation methods to explore the diffusion dynamics in protein folding. We found the diffusion as a quantitative measure of escape from local traps along the protein folding funnel with chosen reaction coordinates has two remarkable effects on kinetics. At a fixed coordinate, local escape time depends on the distribution of barriers around it, therefore the diffusion is often time distributed. On the other hand, the environments (local escape barriers) change along the coordinates, therefore diffusion is coordinate dependent. The effects of time-dependent diffusion on folding can lead to non-exponential kinetics and non-Poisson statistics of folding time distribution. The effects of coordinate dependent diffusion on folding can lead to the change of the kinetic barrier height as well as the position of the corresponding transition state and therefore modify the folding kinetic rates as well as the kinetic routes. Our analytical models for folding are based on a generalized Fokker-Planck diffusion equation with diffusion coefficient both dependent on coordinate and time. Our simulation for folding are based on structure-based folding models with a specific fast folding protein CspTm studied experimentally on diffusion and folding with single molecules. The coordinate and time-dependent diffusion are especially important to be considered in fast folding and single molecule studies, when there is a small or no free energy barrier and kinetics is controlled by diffusion while underlying statistics of kinetics become important. Including the coordinate dependence of diffusion will challenge the transition state theory of protein folding. The classical transition state theory will have to be modified to be consistent. The more detailed folding mechanistic studies involving phi value analysis based on the classical transition state theory will also have to be quantitatively modified. Complex kinetics with multiple time scales may allow us not only to explore the folding kinetics but also probe the local landscape and barrier height distribution with single-molecule experiments.
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Affiliation(s)
- Ronaldo J Oliveira
- Departamento de Física - Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista, São José do Rio Preto 15054-000, Brazil
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Abstract
The present study aimed at comparing the effects of traditional resistance training (TRT) and power training (PT) in inducing muscle hypertrophy in older men. Twenty older men (aged between 69 and 76 years) were divided in two groups: TRT training (n=9) and PT training (n=11). The volunteers trained twice a week, during 10 weeks. Both groups performed an equal work output and the same exercises with loads between 40% and 60% of 1 RM. Three sets of eight repetitions of each exercise were performed with rest intervals of 90 s between sets. Muscle thickness was measured by ultrasound at the biceps brachii (BIC) and rectus femoris (RF), using a 12 MHz high resolution scanning probe. An ANCOVA was used to compare post training muscle thickness values between TRT and PT, using baseline values as covariates. According to the results, RF muscle thickness increased only in PT, while BIC muscle thickness increased in both groups, but with larger increases in PT. In conclusion, ten weeks of PT induced muscle hypertrophy of the upper and lower limb muscles in older men. PT training may yield better results in muscle hypertrophy when compared with TRT.
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Affiliation(s)
- W Nogueira
- College of Physical Education, Catholic University of Brasilia, Taguatinga, Brazil
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Abstract
The present study investigated the interaction between Cdx-2 polymorphism and physical activity level over bone mineral density (BMD) variation in Brazilian postmenopausal women. One hundred and ninety women volunteered to participate in the study (66.6 +/- 5.3 years, 64.58 +/- 11.74 kg and 151.94 +/- 6.36 cm). Physical activity level (PAL) was assessed using the international physical activity questionnaire (IPAQ). Lumbar spine (L2 - L4), femoral neck, great trochanter and Wards' triangle bone mineral density (BMD) were measured by dual-energy X-ray absorptiometry (DXA). The Cdx-2 polymorphism was genotyped by minisequencing, using the SNaPshottrade mark Multiplex System (Applied Biosystems, Foster City, CA, USA). Overall, no significant association was found between Cdx-2 polymorphism and adjusted BMD at any site. However, the results revealed a significant interaction between PAL and Cdx-2 genotype on adjusted femoral neck and Wards' triangle BMD. Active women carrying the Cdx-G/G genotype showed higher adjusted femoral neck and Wards' triangle BMD than inactive women carrying the same genotype, thus suggesting a larger chronic response to physical activity. These results suggest that, in postmenopausal women, the Cdx-2 polymorphism does not influence BMD by itself; however, it seems to affect the BMD response to physical activity since only the Cdx-G/G genotype carriers presented significant differences between active and inactive.
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Affiliation(s)
- P Gentil
- Programa de Pós Graduação em Educação Física, Universidade Católica de Brasília, Taguatinga, Brazil.
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Chahine J, Oliveira RJ, Leite VBP, Wang J. Configuration-dependent diffusion can shift the kinetic transition state and barrier height of protein folding. Proc Natl Acad Sci U S A 2007; 104:14646-51. [PMID: 17804812 PMCID: PMC1976201 DOI: 10.1073/pnas.0606506104] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.6] [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: 11/18/2022] Open
Abstract
We show that diffusion can play an important role in protein-folding kinetics. We explicitly calculate the diffusion coefficient of protein folding in a lattice model. We found that diffusion typically is configuration- or reaction coordinate-dependent. The diffusion coefficient is found to be decreasing with respect to the progression of folding toward the native state, which is caused by the collapse to a compact state constraining the configurational space for exploration. The configuration- or position-dependent diffusion coefficient has a significant contribution to the kinetics in addition to the thermodynamic free-energy barrier. It effectively changes (increases in this case) the kinetic barrier height as well as the position of the corresponding transition state and therefore modifies the folding kinetic rates as well as the kinetic routes. The resulting folding time, by considering both kinetic diffusion and the thermodynamic folding free-energy profile, thus is slower than the estimation from the thermodynamic free-energy barrier with constant diffusion but is consistent with the results from kinetic simulations. The configuration- or coordinate-dependent diffusion is especially important with respect to fast folding, when there is a small or no free-energy barrier and kinetics is controlled by diffusion. Including the configurational dependence will challenge the transition state theory of protein folding. The classical transition state theory will have to be modified to be consistent. The more detailed folding mechanistic studies involving phi value analysis based on the classical transition state theory also will have to be modified quantitatively.
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Affiliation(s)
- Jorge Chahine
- Departamento de Física, Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista, 15054-000 São José do Rio Preto, Brazil
- To whom correspondence may be addressed. E-mail: or
| | - Ronaldo J. Oliveira
- Departamento de Física, Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista, 15054-000 São José do Rio Preto, Brazil
| | - Vitor B. P. Leite
- Departamento de Física, Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista, 15054-000 São José do Rio Preto, Brazil
| | - Jin Wang
- Departments of Chemistry and Physics, Stony Brook University, Stony Brook, NY 11794; and
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130021, China
- To whom correspondence may be addressed. E-mail: or
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Lins TCL, Nogueira LR, Lima RM, Gentil P, Oliveira RJ, Pereira RW. A multiplex single-base extension protocol for genotyping Cdx2, FokI, BsmI, ApaI, and TaqI polymorphisms of the vitamin D receptor gene. Genet Mol Res 2007; 6:316-24. [PMID: 17573662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
The well-described role of the vitamin D endocrine system in bone metabolism makes its receptor a widely investigated candidate gene in association studies looking for the genetic basis of complex bone-related phenotypes. Most association studies genotype five polymorphic sites along the gene using PCR-RFLP and allele-specific amplification methods, which may not be the better choice in large case/control or cross-sectional studies. In this case, genotyping SNPs in parallel and using automated allele-calling methods are important to decrease genotyping errors due to manual data handling and save sample in cases where the amount of DNA is limited. The aim of this study was to present a straightforward method based on multiplex PCR amplification followed by multiplex single-base extension as a simple way to genotype five vitamin D receptor gene polymorphisms in parallel, which may be implemented in medium- to large-scale case/control or cross-sectional studies. The results regarding method feasibility and optimization are presented by genotyping eight paternity trios and seven samples of Brazilian postmenopausal women who took part in an ongoing association study carried out by members of our group.
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Affiliation(s)
- T C L Lins
- Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, DF, Brasil
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Oliveira RJ. The active earcanal. J Am Acad Audiol 1997; 8:401-10. [PMID: 9433686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
In the past, the human earcanal has primarily been thought of as a passive conduit for sound. Several studies, reported here, explored evidence of how active the earcanal is. The "active earcanal" is conceptualized and aspects of it are viewed through three timeframes: jaw-induced canal change in seconds/minutes, cerumen production in weeks/months, and aging in years. The influence of each of these aspects on hearing aid performance and resulting patient satisfaction is explored. A new self-assessment tool, a Profile of Hearing Aid Physical Fit, is proposed that focuses on measuring patients' perceptions of those benefits that depend on the interface between earcanal and hearing aid.
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Affiliation(s)
- R J Oliveira
- Hearing Components, Inc., Oakdale, Minnesota 55128, USA
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Da Poian AT, Gomes AM, Oliveira RJ, Silva JL. Migration of vesicular stomatitis virus glycoprotein to the nucleus of infected cells. Proc Natl Acad Sci U S A 1996; 93:8268-73. [PMID: 8710859 PMCID: PMC38659 DOI: 10.1073/pnas.93.16.8268] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
A new means of direct visualization of the early events of viral infection by selective fluorescence labeling of viral proteins coupled with digital imaging microscopy is reported. The early phases of viral infection have great importance for understanding viral replication and pathogenesis. Vesicular stomatitis virus, the best-studied rhabdovirus, is composed of an RNA genome of negative sense, five viral proteins, and membrane lipids derived from the host cell. The glycoprotein of vesicular stomatitis virus was labeled with fluorescein isothiocyanate, and the labeled virus was incubated with baby hamster kidney cells. After initiation of infection, the fluorescence of the labeled glycoprotein was first seen inside the cells in endocytic vesicles. The fluorescence progressively migrated to the nucleus of infected cells. After 1 h of infection, the virus glycoprotein was concentrated in the nucleus and could be recovered intact in a preparation of purified nuclei. These results suggest that uncoating of the viral RNA occurs close to the nuclear membrane, which would precede transcription of the leader RNA that enters the nucleus to shut off cellular RNA synthesis and DNA replication.
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Affiliation(s)
- A T Da Poian
- Departamento de Bioquímica Médica, Universidade Federal do Rio de Janeiro, Brazil
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Abstract
Two procedures were used with one subject to examine changes in the ear canal with jaw motion. Silicone ear impressions were examined to measure the effect of jaw position. Magnetic resonance imaging was used to define the three-dimensional structure of the canal and visualize key underlying tissue. Results showed that inexpensive impressions can detail changes in the cartilaginous region of the canal. Approximately a 25% change in this subject's ear canal with different jaw positions was observed in the anterior/posterior plane with essentially no change in the superior/inferior plane. This is likely related to asymmetric stress from action of the mandibular condyle on neighboring cartilaginous tissue. Solutions to jaw motion-induced feedback problems are suggested.
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Brandts JF, Oliveira RJ, Westort C. Thermodynamics of protein denaturation. Effect of pressu on the denaturation of ribonuclease A. Biochemistry 1970; 9:1038-47. [PMID: 5417389 DOI: 10.1021/bi00806a045] [Citation(s) in RCA: 273] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Graves DJ, Mann SA, Philip G, Oliveira RJ. A probe into the catalytic activity and subunit assembly of glycogen phosphorylase. Desensitization of allosteric control by limited tryptic digestion. J Biol Chem 1968; 243:6090-8. [PMID: 5723454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
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