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Godoy R, Macedo AB, Gervazio KY, Ribeiro LR, Lima JLF, Salvadori MGSS. Effects of ortho-eugenol on anxiety, working memory and oxidative stress in mice. BRAZ J BIOL 2023; 83:e271785. [PMID: 37610945 DOI: 10.1590/1519-6984.271785] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Accepted: 06/21/2023] [Indexed: 08/25/2023] Open
Abstract
Ortho-eugenol is a synthetic derivative from eugenol, the major compound of clove essential oil, which has demonstrated antidepressant and antinociceptive effects in pioneering studies. Additionally, its effects appear to be dependent on the noradrenergic and dopaminergic systems. Depression and anxiety disorders are known to share a great overlap in their pathophysiology, and many drugs are effective in the treatment of both diseases. Furthermore, high levels of anxiety are related to working memory deficits and increased oxidative stress. Thus, in this study we investigated the effects of acute treatment of ortho-eugenol, at 50, 75 and 100 mg/kg, on anxiety, working memory and oxidative stress in male Swiss mice. Our results show that the 100 mg/kg dose increased the number of head-dips and reduced the latency in the hole-board test. The 50 mg/kg dose reduced malondialdehyde levels in the prefrontal cortex and the number of Y-maze entries compared to the MK-801-induced hyperlocomotion group. All doses reduced nitrite levels in the hippocampus. It was also possible to assess a statistical correlation between the reduction of oxidative stress and hyperlocomotion after the administration of ortho-eugenol. However, acute treatment was not able to prevent working memory deficits. Therefore, the present study shows that ortho-eugenol has an anxiolytic and antioxidant effect, and was able to prevent substance-induced hyperlocomotion. Our results contribute to the elucidation of the pharmacological profile of ortho-eugenol, as well as to direct further studies that seek to investigate its possible clinical applications.
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Affiliation(s)
- R Godoy
- Universidade Federal da Paraíba, Instituto de Pesquisa em Fármacos e Medicamentos, Laboratório de Psicofarmacologia, João Pessoa, PB, Brasil
| | - A B Macedo
- Universidade Federal da Paraíba, Instituto de Pesquisa em Fármacos e Medicamentos, Laboratório de Psicofarmacologia, João Pessoa, PB, Brasil
| | - K Y Gervazio
- Universidade Federal da Paraíba, Instituto de Pesquisa em Fármacos e Medicamentos, Laboratório de Psicofarmacologia, João Pessoa, PB, Brasil
- Universidade Federal da Paraíba, Centro de Ciências da Saúde, Programa de Pós-graduação em Produtos Bioativos Naturais e Sintéticos - PgPNSB, João Pessoa, PB, Brasil
| | - L R Ribeiro
- Universidade Federal da Paraíba, Instituto de Pesquisa em Fármacos e Medicamentos, Laboratório de Psicofarmacologia, João Pessoa, PB, Brasil
| | - J L F Lima
- Universidade Federal da Paraíba, Instituto de Pesquisa em Fármacos e Medicamentos, Laboratório de Psicofarmacologia, João Pessoa, PB, Brasil
- Universidade Federal da Paraíba, Centro de Ciências da Saúde, Programa de Pós-graduação em Produtos Bioativos Naturais e Sintéticos - PgPNSB, João Pessoa, PB, Brasil
| | - M G S S Salvadori
- Universidade Federal da Paraíba, Instituto de Pesquisa em Fármacos e Medicamentos, Laboratório de Psicofarmacologia, João Pessoa, PB, Brasil
- Universidade Federal da Paraíba, Centro de Ciências da Saúde, Programa de Pós-graduação em Produtos Bioativos Naturais e Sintéticos - PgPNSB, João Pessoa, PB, Brasil
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2
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Ribeiro LF, Catarino T, Carvalho M, Cortes L, Santos SD, Opazo PO, Ribeiro LR, Oliveiros B, Choquet D, Esteban JA, Peça J, Carvalho AL. Ligand-independent activity of the ghrelin receptor modulates AMPA receptor trafficking and supports memory formation. Sci Signal 2021; 14:14/670/eabb1953. [PMID: 33593997 DOI: 10.1126/scisignal.abb1953] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The biological signals of hunger, satiety, and memory are interconnected. The role of the hormone ghrelin in regulating feeding and memory makes ghrelin receptors attractive targets for associated disorders. We investigated the effects of the high ligand-independent activity of the ghrelin receptor GHS-R1a on the physiology of excitatory synapses in the hippocampus. Blocking this activity produced a decrease in the synaptic content of AMPA receptors in hippocampal neurons and a reduction in GluA1 phosphorylation at Ser845 Reducing the ligand-independent activity of GHS-R1a increased the surface diffusion of AMPA receptors and impaired AMPA receptor-dependent synaptic delivery induced by chemical long-term potentiation. Accordingly, we found that blocking this GHS-R1a activity impaired spatial and recognition memory in mice. These observations support a role for the ligand-independent activity of GHS-R1a in regulating AMPA receptor trafficking under basal conditions and in the context of synaptic plasticity that underlies learning.
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Affiliation(s)
- Luís F Ribeiro
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal.
| | - Tatiana Catarino
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal.,University of Coimbra, IIIUC-Institute for Interdisciplinary Research, 3030-789 Coimbra, Portugal
| | - Mário Carvalho
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal.,MIT-Portugal Bioengineering Systems Doctoral Program, NOVA University of Lisbon, 1099-85, Lisboa, Portugal
| | - Luísa Cortes
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal.,University of Coimbra, IIIUC-Institute for Interdisciplinary Research, 3030-789 Coimbra, Portugal
| | - Sandra D Santos
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal.,University of Coimbra, IIIUC-Institute for Interdisciplinary Research, 3030-789 Coimbra, Portugal
| | - Patricio O Opazo
- University of Bordeaux, Interdisciplinary Institute for Neuroscience, UMR 5297, 33000 Bordeaux, France.,CNRS, UMR 5297, 33000 Bordeaux, France
| | - Lyn Rosenbrier Ribeiro
- Functional and Mechanistic Safety, Clinical Pharmacology and Safety Sciences, R&D AstraZeneca, Cambridge CB2 0SL, UK
| | - Bárbara Oliveiros
- Laboratory of Biostatistics and Medical Informatics (LBIM), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal.,Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal
| | - Daniel Choquet
- University of Bordeaux, Interdisciplinary Institute for Neuroscience, UMR 5297, 33000 Bordeaux, France.,CNRS, UMR 5297, 33000 Bordeaux, France.,Bordeaux Imaging Center, UMS 3420, CNRS-Bordeaux University, US4 INSERM, 33000 Bordeaux, France
| | - José A Esteban
- Department of Molecular Neurobiology, Centro de Biología Molecular "Severo Ochoa," Consejo Superior de Investigaciones Científicas (CSIC)/Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - João Peça
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal.,University of Coimbra, Department of Life Sciences, 3000-456 Coimbra, Portugal
| | - Ana Luísa Carvalho
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal. .,University of Coimbra, Department of Life Sciences, 3000-456 Coimbra, Portugal
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Jenkinson S, Schmidt F, Rosenbrier Ribeiro L, Delaunois A, Valentin JP. A practical guide to secondary pharmacology in drug discovery. J Pharmacol Toxicol Methods 2020; 105:106869. [PMID: 32302774 DOI: 10.1016/j.vascn.2020.106869] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [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: 02/21/2020] [Revised: 03/21/2020] [Accepted: 04/03/2020] [Indexed: 01/29/2023]
Abstract
Secondary pharmacological profiling is increasingly applied in pharmaceutical drug discovery to address unwanted pharmacological side effects of drug candidates before entering the clinic. Regulators, drug makers and patients share a demand for deep characterization of secondary pharmacology effects of novel drugs and their metabolites. The scope of such profiling has therefore expanded substantially in the past two decades, leading to the implementation of broad in silico profiling methods and focused in vitro off-target screening panels, to identify liabilities, but also opportunities, as early as possible. The pharmaceutical industry applies such panels at all stages of drug discovery routinely up to early development. Nevertheless, target composition, screening technologies, assay formats, interpretation and scheduling of panels can vary significantly between companies in the absence of dedicated guidelines. To contribute towards best practices in secondary pharmacology profiling, this review aims to summarize the state-of-the art in this field. Considerations are discussed with respect to panel design, screening strategy, implementation and interpretation of the data, including regulatory perspectives. The cascaded, or integrated, use of in silico and off-target profiling allows to exploit synergies for comprehensive safety assessment of drug candidates.
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Affiliation(s)
- Stephen Jenkinson
- Drug Safety Research and Development, Pfizer Inc., La Jolla, CA 92121, United States of America.
| | - Friedemann Schmidt
- Sanofi, R&D Preclinical Safety, Industriepark Höchst, 65926 Frankfurt/Main, Germany
| | - Lyn Rosenbrier Ribeiro
- Medicines Discovery Catapult, Block 35, Mereside, Alderley Park, Alderley Edge, SK10 4TG, United Kingdom
| | - Annie Delaunois
- UCB BioPharma SRL, Early Solutions, Development Science, Non-Clinical Safety, 1420 Braine L'Alleud, Walloon Region, Belgium
| | - Jean-Pierre Valentin
- UCB BioPharma SRL, Early Solutions, Development Science, Non-Clinical Safety, 1420 Braine L'Alleud, Walloon Region, Belgium
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4
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Ribeiro LR, Sharma P, Kavanagh S, Noeske T. Application of PBPK modelling of enterocyte exposure aids in vitro to in vivo translational risk assessment of μ-opioid-induced clinical constipation. J Pharmacol Toxicol Methods 2018. [DOI: 10.1016/j.vascn.2018.01.498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Ribeiro LR, Larner C, Persson M, Scott C. Evolution in diversity of a drugs primary target class poses a challenge to standard secondary pharmacology profiling: A look to future requirements and opportunities. J Pharmacol Toxicol Methods 2018. [DOI: 10.1016/j.vascn.2018.01.554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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6
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Ribeiro LR, Pietras M. Interpreting In Vitro Pharmacological Profiling Data Requires Contextualisation of Risk in Relation to the Safety Margin for Different Off-target Interactions: Translational Pharmacology Case Studies. J Pharmacol Toxicol Methods 2017. [DOI: 10.1016/j.vascn.2017.09.153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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7
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Rosenbrier Ribeiro L, Ian Storer R. A semi-quantitative translational pharmacology analysis to understand the relationship between in vitro ENT1 inhibition and the clinical incidence of dyspnoea and bronchospasm. Toxicol Appl Pharmacol 2016; 317:41-50. [PMID: 28041785 DOI: 10.1016/j.taap.2016.12.021] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Revised: 12/22/2016] [Accepted: 12/27/2016] [Indexed: 01/17/2023]
Abstract
Adenosine contributes to the pathophysiology of respiratory disease, and adenosine challenge leads to bronchospasm and dyspnoea in patients. The equilibrative nucleoside transporter 1 (ENT1) terminates the action of adenosine by removal from the extracellular environment. Therefore, it is proposed that inhibition of ENT1 in respiratory disease patients leads to increased adenosine concentrations, triggering bronchospasm and dyspnoea. This study aims to assess the translation of in vitro ENT1 inhibition to the clinical incidence of bronchospasm and dyspnoea in respiratory disease, cardiovascular disease and healthy volunteer populations. Four marketed drugs with ENT1 activity were assessed; dipyridamole, ticagrelor, draflazine, cilostazol. For each patient population, the relationship between in vitro ENT1 [3H]-NBTI binding affinity (Ki) and [3H]-adenosine uptake (IC50) to the incidence of: (1) bronchospasm/severe dyspnoea; (2) tolerated dyspnoea and; (3) no adverse effects, was evaluated. A high degree of ENT1 inhibition (≥13.3x Ki, ≥4x IC50) associated with increased incidence of bronchospasm/severe dyspnoea for patients with respiratory disease only, whereas a lower degree of ENT1 inhibition (≥0.1x Ki, ≥0.05x IC50) associated with a tolerable level of dyspnoea in both respiratory and cardiovascular disease patients. ENT1 inhibition had no effect in healthy volunteers. Furthermore, physicochemical properties correlative with ENT1 binding were assessed using a set of 1625 diverse molecules. Binding to ENT1 was relatively promiscuous (22% compounds Ki<1μM) especially for neutral or basic molecules, and greater incidence tracked with higher lipophilicity (clogP >5). This study rationalises inclusion of an assessment of ENT1 activity during early safety profiling for programs targeting respiratory disorders.
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Affiliation(s)
- Lyn Rosenbrier Ribeiro
- Discovery Safety, Drug Safety and Metabolism, AstraZeneca, Cambridge Science Park, Cambridge, United Kingdom.
| | - R Ian Storer
- Discovery Safety, Drug Safety and Metabolism, AstraZeneca, Cambridge Science Park, Cambridge, United Kingdom
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8
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Angeli JPF, Ribeiro LR, Bellini MF. Anti-clastogenic effect of b-glucan extracted from barley towards chemically induced DNA damage in rodent cells. Hum Exp Toxicol 2016; 25:319-24. [PMID: 16866189 DOI: 10.1191/0960327106ht631oa] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [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: 11/05/2022]
Abstract
b-Glucan (BG) was tested in vitro to determine its potential clastogenic and/or anti-clastogenic activity, and attempts were made to elucidate its possible mechanism of action by using combinations with an inhibitor of DNA polymerase. The study was carried out on cells deficient (CHO-k1) and cells proficient (HTC) in phases I and II enzymes, and the DNA damage was assessed by the chromosomal aberration assay. BG did not show a clastogenic effect, but was anti-clastogenic in both cell lines used, and at all concentrations tested (2.5, 5 and 10 mg/mL) in combination with damage inducing agents (methylmethane sulfonate in cell line CHO-k1, and methylmethane sulfonate or 2-aminoanthracene in cell line HTC). BG also showed a protective effect in the presence of a DNA polymerase b inhibitor (cytosine arabinoside-3-phosphate, Ara-C), demonstrating that BG does not act through an anti-mutagenic mechanism of action involving DNA polymerase b.
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Affiliation(s)
- J P F Angeli
- Departamento de Biologia Geral, Universidade Estadual de Londrina, Londrina, PR, Brazil
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9
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Silva HVR, Magalhães FF, Ribeiro LR, Souza ALP, Freitas CIA, de Oliveira MF, Silva AR, Silva LDM. Morphometry, Morphology and Ultrastructure of Ring-tailed Coati Sperm ( Nasua nasuaLinnaeus, 1766). Reprod Domest Anim 2015; 50:945-51. [DOI: 10.1111/rda.12613] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2015] [Accepted: 08/26/2015] [Indexed: 11/29/2022]
Affiliation(s)
- HVR Silva
- Laboratory of Carnivores Reproduction; State University of Ceará; Fortaleza CE Brazil
| | - FF Magalhães
- Laboratory of Carnivores Reproduction; State University of Ceará; Fortaleza CE Brazil
| | - LR Ribeiro
- Aba-Yby Conservation Institute; EcoPoint; Fortaleza CE Brazil
| | - ALP Souza
- Laboratory of Animal Germplasm Conservation; Federal Rural University of Semi-Arid; Mossoró RN Brazil
| | - CIA Freitas
- Multiplication Center of Wild Animals; Federal Rural University of Semi-Arid; Mossoró RN Brazil
| | - MF de Oliveira
- Animal Science Department; Federal Rural University of Semi-Arid; Mossoró RN Brazil
| | - AR Silva
- Laboratory of Animal Germplasm Conservation; Federal Rural University of Semi-Arid; Mossoró RN Brazil
| | - LDM Silva
- Laboratory of Carnivores Reproduction; State University of Ceará; Fortaleza CE Brazil
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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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Bowes J, Ribeiro LR, Rolf M, Armstrong D, Valentin JP. Interpretation of in vitro pharmacological profiling data in preclinical safety assessment. J Pharmacol Toxicol Methods 2014. [DOI: 10.1016/j.vascn.2014.03.051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Ribeiro LR, Morton M, Wright L, Kavanagh S, Rolf M, Armstrong D, Bowes J, Valentin JP. Acetylcholinesterase: Is there a recommended level of off target activity that can be tolerated and predicted safe? J Pharmacol Toxicol Methods 2014. [DOI: 10.1016/j.vascn.2014.03.064] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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13
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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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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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Semprebon SC, de Fátima Â, Lepri SR, Sartori D, Ribeiro LR, Mantovani MS. (S)-Goniothalamin induces DNA damage, apoptosis, and decrease in BIRC5 messenger RNA levels in NCI-H460 cells. Hum Exp Toxicol 2013; 33:3-13. [PMID: 23749456 DOI: 10.1177/0960327113491506] [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] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
(R)-Goniothalamin (R-GNT) is a secondary metabolite isolated from the plants of the genus Goniothalamus. This molecule has attracted the attention of researchers because of its selective cytotoxicity against tumor cells and its ability to induce apoptosis. (S)-Goniothalamin (S-GNT) is a synthetic enantiomer of R-GNT, and its mechanism of action is largely unknown. In this study, we investigated the activity of S-GNT in a human non-small cell lung cancer NCI-H460 cells. We observed that the cells exposed to this compound exhibited cytotoxicity in a concentration-dependent manner. Based on the data obtained through the assessment of apoptosis induction in situ and the comet assay, we suggest that this cytotoxicity occurs due to the potential ability of this molecule to induce DNA damage with the consequent induction of cell death via apoptosis. A significant reduction in the messenger RNA levels of baculoviral inhibitor of apoptosis repeat-containing 5 (BIRC5) gene that encodes the survivin protein was found. This novel finding may explain the inhibition of cell proliferation and induction of apoptosis in tumor cells caused by this compound.
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Affiliation(s)
- S C Semprebon
- 1Departamento de Biologia Geral, Universidade Estadual de Londrina, Londrina, Paraná, Brazil
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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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Crawford JJ, Kenny PW, Bowyer J, Cook CR, Finlayson JE, Heyes C, Highton AJ, Hudson JA, Jestel A, Krapp S, Martin S, MacFaul PA, McDermott BP, McGuire TM, Morley AD, Morris JJ, Page KM, Ribeiro LR, Sawney H, Steinbacher S, Smith C, Dossetter AG. Pharmacokinetic Benefits of 3,4-Dimethoxy Substitution of a Phenyl Ring and Design of Isosteres Yielding Orally Available Cathepsin K Inhibitors. J Med Chem 2012; 55:8827-37. [DOI: 10.1021/jm301119s] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- James J. Crawford
- AstraZeneca R&D, Mereside, Alderley Park, Macclesfield, Cheshire SK10 4TG, United Kingdom
| | - Peter W. Kenny
- AstraZeneca R&D, Mereside, Alderley Park, Macclesfield, Cheshire SK10 4TG, United Kingdom
| | - Jonathan Bowyer
- AstraZeneca R&D, Mereside, Alderley Park, Macclesfield, Cheshire SK10 4TG, United Kingdom
| | - Calum R. Cook
- AstraZeneca R&D, Mereside, Alderley Park, Macclesfield, Cheshire SK10 4TG, United Kingdom
| | - Jonathan E. Finlayson
- AstraZeneca R&D, Mereside, Alderley Park, Macclesfield, Cheshire SK10 4TG, United Kingdom
| | - Christine Heyes
- AstraZeneca R&D, Mereside, Alderley Park, Macclesfield, Cheshire SK10 4TG, United Kingdom
| | - Adrian J. Highton
- AstraZeneca R&D, Mereside, Alderley Park, Macclesfield, Cheshire SK10 4TG, United Kingdom
| | - Julian A. Hudson
- AstraZeneca R&D, Mereside, Alderley Park, Macclesfield, Cheshire SK10 4TG, United Kingdom
| | - Anja Jestel
- Proteros Biostructures, Am Klopferspitz 19, D-82152 Martinsried,
Germany
| | - Stephan Krapp
- Proteros Biostructures, Am Klopferspitz 19, D-82152 Martinsried,
Germany
| | - Scott Martin
- AstraZeneca R&D, Mereside, Alderley Park, Macclesfield, Cheshire SK10 4TG, United Kingdom
| | - Philip A. MacFaul
- AstraZeneca R&D, Mereside, Alderley Park, Macclesfield, Cheshire SK10 4TG, United Kingdom
| | - Benjamin P. McDermott
- AstraZeneca R&D, Mereside, Alderley Park, Macclesfield, Cheshire SK10 4TG, United Kingdom
| | - Thomas M. McGuire
- AstraZeneca R&D, Mereside, Alderley Park, Macclesfield, Cheshire SK10 4TG, United Kingdom
| | - Andrew D. Morley
- AstraZeneca R&D, Mereside, Alderley Park, Macclesfield, Cheshire SK10 4TG, United Kingdom
| | - Jeffrey J. Morris
- AstraZeneca R&D, Mereside, Alderley Park, Macclesfield, Cheshire SK10 4TG, United Kingdom
| | - Ken M. Page
- AstraZeneca R&D, Mereside, Alderley Park, Macclesfield, Cheshire SK10 4TG, United Kingdom
| | - Lyn Rosenbrier Ribeiro
- AstraZeneca R&D, Mereside, Alderley Park, Macclesfield, Cheshire SK10 4TG, United Kingdom
| | - Helen Sawney
- AstraZeneca R&D, Mereside, Alderley Park, Macclesfield, Cheshire SK10 4TG, United Kingdom
| | - Stefan Steinbacher
- Proteros Biostructures, Am Klopferspitz 19, D-82152 Martinsried,
Germany
| | - Caroline Smith
- AstraZeneca R&D, Mereside, Alderley Park, Macclesfield, Cheshire SK10 4TG, United Kingdom
| | - Alexander G. Dossetter
- AstraZeneca R&D, Mereside, Alderley Park, Macclesfield, Cheshire SK10 4TG, United Kingdom
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Dossetter AG, Bowyer J, Cook CR, Crawford JJ, Finlayson JE, Heron NM, Heyes C, Highton AJ, Hudson JA, Jestel A, Krapp S, MacFaul PA, McGuire TM, Morley AD, Morris JJ, Page KM, Ribeiro LR, Sawney H, Steinbacher S, Smith C. Isosteric replacements for benzothiazoles and optimisation to potent Cathepsin K inhibitors free from hERG channel inhibition. Bioorg Med Chem Lett 2012; 22:5563-8. [DOI: 10.1016/j.bmcl.2012.07.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2012] [Revised: 06/29/2012] [Accepted: 07/04/2012] [Indexed: 11/29/2022]
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Dossetter AG, Beeley H, Bowyer J, Cook CR, Crawford JJ, Finlayson JE, Heron NM, Heyes C, Highton AJ, Hudson JA, Jestel A, Kenny PW, Krapp S, Martin S, MacFaul PA, McGuire TM, Gutierrez PM, Morley AD, Morris JJ, Page KM, Ribeiro LR, Sawney H, Steinbacher S, Smith C, Vickers M. (1R,2R)-N-(1-Cyanocyclopropyl)-2-(6-methoxy-1,3,4,5-tetrahydropyrido[4,3-b]indole-2-carbonyl)cyclohexanecarboxamide (AZD4996): A Potent and Highly Selective Cathepsin K Inhibitor for the Treatment of Osteoarthritis. J Med Chem 2012; 55:6363-74. [DOI: 10.1021/jm3007257] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Howard Beeley
- AstraZeneca R&D, Mereside, Alderley Park, Macclesfield, Cheshire, SK10 4TG, U.K
| | - Jonathan Bowyer
- AstraZeneca R&D, Mereside, Alderley Park, Macclesfield, Cheshire, SK10 4TG, U.K
| | - Calum R. Cook
- AstraZeneca R&D, Mereside, Alderley Park, Macclesfield, Cheshire, SK10 4TG, U.K
| | - James J. Crawford
- AstraZeneca R&D, Mereside, Alderley Park, Macclesfield, Cheshire, SK10 4TG, U.K
| | | | - Nicola M. Heron
- AstraZeneca R&D, Mereside, Alderley Park, Macclesfield, Cheshire, SK10 4TG, U.K
| | - Christine Heyes
- AstraZeneca R&D, Mereside, Alderley Park, Macclesfield, Cheshire, SK10 4TG, U.K
| | - Adrian J. Highton
- AstraZeneca R&D, Mereside, Alderley Park, Macclesfield, Cheshire, SK10 4TG, U.K
| | - Julian A. Hudson
- AstraZeneca R&D, Mereside, Alderley Park, Macclesfield, Cheshire, SK10 4TG, U.K
| | - Anja Jestel
- Proteros Biostructures, Am Klopferspitz 19, D-82152 Martinsried, Germany
| | - Peter W. Kenny
- AstraZeneca R&D, Mereside, Alderley Park, Macclesfield, Cheshire, SK10 4TG, U.K
| | - Stephan Krapp
- Proteros Biostructures, Am Klopferspitz 19, D-82152 Martinsried, Germany
| | - Scott Martin
- AstraZeneca R&D, Mereside, Alderley Park, Macclesfield, Cheshire, SK10 4TG, U.K
| | - Philip A. MacFaul
- AstraZeneca R&D, Mereside, Alderley Park, Macclesfield, Cheshire, SK10 4TG, U.K
| | - Thomas M. McGuire
- AstraZeneca R&D, Mereside, Alderley Park, Macclesfield, Cheshire, SK10 4TG, U.K
| | | | - Andrew D. Morley
- AstraZeneca R&D, Mereside, Alderley Park, Macclesfield, Cheshire, SK10 4TG, U.K
| | - Jeffrey J. Morris
- AstraZeneca R&D, Mereside, Alderley Park, Macclesfield, Cheshire, SK10 4TG, U.K
| | - Ken M. Page
- AstraZeneca R&D, Mereside, Alderley Park, Macclesfield, Cheshire, SK10 4TG, U.K
| | | | - Helen Sawney
- AstraZeneca R&D, Mereside, Alderley Park, Macclesfield, Cheshire, SK10 4TG, U.K
| | - Stefan Steinbacher
- Proteros Biostructures, Am Klopferspitz 19, D-82152 Martinsried, Germany
| | - Caroline Smith
- AstraZeneca R&D, Mereside, Alderley Park, Macclesfield, Cheshire, SK10 4TG, U.K
| | - Madeleine Vickers
- AstraZeneca R&D, Mereside, Alderley Park, Macclesfield, Cheshire, SK10 4TG, U.K
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Davies MR, Ribeiro LR, Downey-Jones M, Needham MRC, Oakley C, Wardale J. Ligands for retinoic acid receptors are elevated in osteoarthritis and may contribute to pathologic processes in the osteoarthritic joint. ACTA ACUST UNITED AC 2009; 60:1722-32. [PMID: 19479829 DOI: 10.1002/art.24550] [Citation(s) in RCA: 26] [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: 11/09/2022]
Abstract
OBJECTIVE Vitamin A derivatives, including all-trans-retinoic acid (ATRA), have a well-established role during skeletal development and limb formation and have been shown to have profound effects on chondrocyte phenotype. The aim of this study was to elucidate the effects of retinoids and components of the retinoid metabolic pathway on chondrocyte phenotype in the tibiofemoral joints of patients with osteoarthritis (OA), to show that the retinoids can have multiple effects relevant to the OA disease process. METHODS Human explant tissue and a chondrocyte-like cell line were treated with ATRA, and the responses of 4 key markers of chondrocyte phenotype were analyzed. In addition, the effects of ATRA on a number of novel genes associated with OA were assessed using a low-density microarray containing 80 disease marker genes. RESULTS Vitamin A metabolite levels were elevated in synovial fluid, serum, and cartilage from patients with OA. Expression profiling of a retinoic acid receptor alpha coactivator protein, P/CAF, demonstrated elevated expression in patients with OA, suggesting the potential for increased signaling via the retinoid receptors in the disease. ATRA increased the levels of matrix metalloproteinase 13 and aggrecanase activity in human cartilage explants and in a human chondrocyte cell line. Furthermore, ATRA altered the expression of a wide range of relevant genes, including the types I, II, IX, and XI collagen genes, toward a nonchondrogenic and OA-like phenotype. CONCLUSION These results suggest that retinoid signaling could have a central role in OA, and that components of the pathway may provide potential disease biomarkers or targets for therapeutic intervention.
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Morley AD, Kenny PW, Burton B, Heald RA, MacFaul PA, Mullett J, Page K, Porres SS, Ribeiro LR, Smith P, Ward S, Wilkinson TJ. 5-Aminopyrimidin-2-ylnitriles as Cathepsin K inhibitors. Bioorg Med Chem Lett 2009; 19:1658-61. [DOI: 10.1016/j.bmcl.2009.01.110] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2009] [Revised: 01/29/2009] [Accepted: 01/30/2009] [Indexed: 10/21/2022]
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Minicucci EM, Ribeiro DA, de Camargo B, Costa MC, Ribeiro LR, Favero Salvadori DM. DNA damage in lymphocytes and buccal mucosa cells of children with malignant tumours undergoing chemotherapy. Clin Exp Med 2008; 8:79-85. [PMID: 18618217 DOI: 10.1007/s10238-008-0161-3] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [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: 08/30/2007] [Accepted: 12/11/2007] [Indexed: 11/25/2022]
Abstract
The aim of the present study was to evaluate DNA damage (micronucleus) in cytokinesis-blocked lymphocytes and exfoliated buccal mucosa cells from children with malignant tumours and under chemotherapy. Micronucleated cells (MNCs) were assessed from children before and during chemotherapy. A total of 21 healthy children (controls), matched for gender and age, were used as control. The results pointed out higher frequencies of micronucleated lymphocytes in children with malignant tumour before any therapy when compared to healthy probands. Furthermore an increase of micronucleated lymphocytes during chemotherapy was detected when compared to the data obtained before chemotherapy. No statistically significant increases of MNCs were noticed in buccal mucosa cells at any of the timepoints evaluated. Taken together, these data indicate that the presence of malignant tumours may increase the frequency of DNA damage in circulating lymphocytes, these cells being more sensitive for detecting chromosome aberrations caused by anti-cancer drugs.
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Affiliation(s)
- E M Minicucci
- Department of Pathology, Faculty of Medicine, Botucatu Medical School, UNESP, 18618-000, Botucatu, SP, Brazil
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23
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Tsuboy MS, Angeli JPF, Mantovani MS, Knasmüller S, Umbuzeiro GA, Ribeiro LR. Genotoxic, mutagenic and cytotoxic effects of the commercial dye CI Disperse Blue 291 in the human hepatic cell line HepG2. Toxicol In Vitro 2007; 21:1650-5. [PMID: 17728095 DOI: 10.1016/j.tiv.2007.06.020] [Citation(s) in RCA: 105] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2007] [Revised: 06/25/2007] [Accepted: 06/27/2007] [Indexed: 01/26/2023]
Abstract
Textile dyes are discarded into the aquatic ecosystem via industrial effluents and potentially expose humans and local biota to adverse effects. The commercial dye CI Disperse Blue 291 which contains the aminoazobenzene 2-[(2-bromo-4,6-dinitrophenyl)azo]-5(diethylamino)-4-methoxyacetanilide (CAS registry no. 56548-64-2), was tested for genotoxicity and cytotoxicity in the human hepatoma cell line HepG2, using the comet assay, micronucleus (MN) test and a cell viability test. Five different concentrations of the test compound were examined: 200 microg/ml, 400 microg/ml, 600 microg/ml, 800 microg/ml and 1000 microg/ml. An increase in comet tail length and in the frequency of MN was detected with exposure of cells to concentrations of the commercial dye from 400 microg/ml. Furthermore, the dye was found to decrease cell viability. The results of this study demonstrate for the first time the genotoxic and mutagenic effects of the dye CI Disperse Blue 291 in mammalian cells, thus stressing the need to develop non-mutagenic dyes and to invest in improving the treatment of effluents. These measures will help to prevent harmful effects that these compounds can have on humans and aquatic organisms that come in contact with them.
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Affiliation(s)
- M S Tsuboy
- Departamento de Ciências Biológicas, UNESP, Assis, SP, Brazil
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24
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Miyaji CK, Poersch A, Ribeiro LR, Eira AF, Cólus IMS. Shiitake (Lentinula edodes (Berkeley) Pegler) extracts as a modulator of micronuclei induced in HEp-2 cells. Toxicol In Vitro 2006; 20:1555-9. [PMID: 16949247 DOI: 10.1016/j.tiv.2006.07.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [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: 04/28/2006] [Revised: 07/02/2006] [Accepted: 07/03/2006] [Indexed: 11/20/2022]
Abstract
Shiitake (Lentinula edodes (Berkeley) Pegler) is one of the most consumed mushrooms, for both therapeutic purposes and as food, therefore, the study of its biological properties is of great interest for producers and consumers. Aqueous extracts of the shiitake mushroom (L. edodes (Berkeley) Pegler) were evaluated by the micronucleus test (MN) in HEp-2 cells in vitro, to analyze their possible mutagenic and antimutagenic activities. None of the three extract concentrations tested (0.5, 1.0 and 1.5mg/mL) presented mutagenicity at any of the preparation temperatures (4 degrees C, 22+/-2 degrees C and 60 degrees C). In the antimutagenicity evaluation, all extract concentrations at all preparation temperatures presented a strong protective activity for the HEp-2 cells in response to the alkylating agent methyl methanesulfonate (MMS) in the different treatment protocols: pre-treatment, simultaneous treatment and post-treatment. The extracts prepared at 22+/-2 degrees C presented the lowest frequencies of MN in the evaluations of mutagenicity and antimutagenicity, indicating these as the best option for potential therapeutic use.
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Affiliation(s)
- C K Miyaji
- Universidade Estadual de Londrina (UEL), Campus Universitario CCB, Departamento de Biologia Geral-CCB, Cx. Postal 6001, CEP 86051-970, Londrina, Paraná, Brazil
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Ribeiro LR, Mantovani MS, Ribeiro DA, Salvadori DMF. Brazilian natural dietary components (annatto, propolis and mushrooms) protecting against mutation and cancer. Hum Exp Toxicol 2006; 25:267-72. [PMID: 16758769 DOI: 10.1191/0960327106ht623oa] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [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: 01/05/2023]
Abstract
Considering the high number of new cancer cases in Brazil (approximately 470000 cases in 2005) and the remarkable differences in the incidence of this disease around the world, the development of chemopreventive strategies using foods widely consumed would have a huge impact, both medically and economically. This review summarizes some of our studies conducted to verify the anti-mutagenic and anti-carcinogenic potential of some Brazilian natural dietary constituents (annatto, mushrooms, and propolis). Overall data have shown a clear role for these compounds in preventing mutation and specific preneoplastic lesions. Taken together, these agents indicate a favorable side-effect profile and may prove to be a promising alternative for cancer prevention strategies, although more investigation is needed to fully explore this issue.
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Affiliation(s)
- L R Ribeiro
- Programa de Pós-Graduação em Patologia, Faculdade de Medicina de Botucatu - UNESP, Botucatu - SP, Brazil
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26
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Angeli JPF, Ribeiro LR, Gonzaga MLC, Soares SDA, Ricardo MPSN, Tsuboy MS, Stidl R, Knasmueller S, Linhares RE, Mantovani MS. Protective effects of β-glucan extracted from Agaricus brasiliensis against chemically induced DNA damage in human lymphocytes. Cell Biol Toxicol 2006; 22:285-91. [PMID: 16802105 DOI: 10.1007/s10565-006-0087-z] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.9] [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: 01/24/2006] [Accepted: 04/19/2006] [Indexed: 10/24/2022]
Abstract
beta-Glucans (BGs) are polysaccharides that are found in the cell walls of organisms such as bacteria, fungi, and some cereals. The objective of the present study was to investigate the genotoxic and antigenotoxic effects of BG extracted from the mushroom Agaricus brasiliensis (=Agaricus blazei Murrill ss. Heinemann). The mutagenic activity of BG was tested in single-cell gel electrophoresis assays with human peripheral lymphocytes. In addition, the protective effects against the cooked food mutagen 3-amino-1-methyl-5H-pyrido[4,3-b]indole (Trp-P-2) and (+/-)-anti-B[a]P-7,8-dihydrodiol-9,10-epoxide (BPDE), which is the main metabolite of B[a]P, and against ROS (H(2)O(2))-induced DNA damage, were studied. The results showed that the compound itself was devoid of mutagenic activity, and that a significant dose-dependent protective effect against damage induced by hydrogen peroxide and Trp-P-2 occurred in the dose range 20-80 microg/ml. To investigate the prevention of Trp-P-2-induced DNA damage, a binding assay was carried out to determine whether BG inactivates the amine via direct binding. Since no such interactions were observed, it is likely that BG interacts with enzymes involved in the metabolism of the amine.
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Affiliation(s)
- J P F Angeli
- Departamento de Biologia Geral, Universidade Estadual de Londrina, Londrina, PR, Brazil
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Bellini MF, Angeli JPF, Matuo R, Terezan AP, Ribeiro LR, Mantovani MS. Antigenotoxicity of Agaricus blazei mushroom organic and aqueous extracts in chromosomal aberration and cytokinesis block micronucleus assays in CHO-k1 and HTC cells. Toxicol In Vitro 2005; 20:355-60. [PMID: 16182507 DOI: 10.1016/j.tiv.2005.08.009] [Citation(s) in RCA: 40] [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: 05/17/2005] [Revised: 07/29/2005] [Accepted: 08/09/2005] [Indexed: 11/23/2022]
Abstract
Agaricus blazei (Ab) has become popularly known for its medicinal properties. Scientifically, it has been tested with regard to its capacity to protect genetic material against damage. We examined different organic extracts (methanolic extract -- ME, hexanic extract -- HE and n-butanolic extract -- BE) and an aqueous extract (AE) of Ab, for their capacity to induce DNA damage as well as for their protective effect. Genetic damage was determined by the chromosomal aberration assay (CA) in CHO-k1 cells for all extracts and the cytokinesis block micronucleus assay (CBMN) in non drug-metabolizing (CHO-k1) and drug-metabolizing (HTC) cell lines for extract BE only. The extracts did not show clastogenicity but showed anticlastogenicity. The greatest percent reduction obtained were with BE (105%) and AE (126%) treatments in CA. BE treatment did not display genotoxicity in CHO-k1, but was genotoxic in HTC. However, BE was shown to be antigenotoxic causing decreased micronucleus frequency in HTC and CHO-k1 cells. These results suggest that all the extracts contained protective substances, but in some cases they could show a genotoxic effect with regard to metabolism. Therefore, these findings warrant caution in the use of this mushroom by the population.
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Affiliation(s)
- M F Bellini
- Departamento de Biologia Geral, Universidade Estadual de Londrina-Campus Universitário, Cx. Postal 6001, 86051990 Londrina, PR, Brazil
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28
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Guterrez ZR, Mantovani MS, Eira AF, Ribeiro LR, Jordão BQ. Variation of the antimutagenicity effects of water extracts of Agaricus blazei Murrill in vitro. Toxicol In Vitro 2005; 18:301-9. [PMID: 15046777 DOI: 10.1016/j.tiv.2003.09.003] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2003] [Accepted: 09/09/2003] [Indexed: 10/26/2022]
Abstract
Agaricus blazei Murill, popularly known as "Sun Mushroom" or "Himematsutake", is native to Brazil. Nowadays, this mushroom has been target of great scientific interest due to its medical power and because it has shown antitumoral and immune modulatory properties. This work evaluated the mutagenic and antimutagenic potential from aqueous extracts prepared in different temperatures (4 degrees C, 25 degrees C and 60 degrees C) from the lineage AB 97/29 in two basidiocarp phases (young and sporulated) and from A. blazei commercialized in Londrina-PR-Brazil, named here as AB PR, and in Piedade-SP-Brazil, named as AB SP. Both micronucleus (MN) as comet assays were used. Chinese hamster lung V79 cells were treated in three antimutagenic experimental protocols: pre-, post- and simultaneous treatments, with the aqueous extracts of the A. blazei Murill and methyl methanesulfonate (MMS). The results suggested that under these circumstances of treatment, aqueous extracts of the A. blazei in both assays did not show any genotoxic potential. However, by the MN test, an antigenotoxic effect was shown against mutagenicity inducted by MMS for aqueous extracts at 60 degrees C of mushroom commercialized in Piedade- SP, in pre-, post- and simultaneous treatments and for AB PR only when used in pre-treatment. On the other hand, with comet assay, the results showed no protective effect in any case. The numbers indicated that different results can be get from A. blazei teas, and that not all of them seemed to be an efficient antimutagen against the induction of micronuclei by MMS.
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Affiliation(s)
- Z R Guterrez
- Departamento de Biologia Geral, Universidade Estadual de Londrina- UEL, Campus Universitário, C. P. 6001, CEP: 86.051-990, Londrina, PR, Brazil
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29
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Miyaji CK, Jordão BQ, Ribeiro LR, Eira AF, Cólus IMS. Genotoxicity and antigenotoxicity assessment of shiitake (Lentinula edodes (Berkeley) Pegler) using the Comet assay. Genet Mol Biol 2004. [DOI: 10.1590/s1415-47572004000100018] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Affiliation(s)
- CK Miyaji
- Universidade Estadual de Londrina, Brazil
| | - BQ Jordão
- Universidade Estadual de Londrina, Brazil
| | - LR Ribeiro
- Universidade Estadual Paulista, Brazil; Universidade Luterana do Brasil, Brazil
| | - AF Eira
- Universidade Estadual Paulista, Brazil
| | - IMS Cólus
- Universidade Estadual de Londrina, Brazil
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Azevedo L, Gomes JC, Stringheta PC, Gontijo AMMC, Padovani CR, Ribeiro LR, Salvadori DMF. Black bean (Phaseolus vulgaris L.) as a protective agent against DNA damage in mice. Food Chem Toxicol 2003; 41:1671-6. [PMID: 14563392 DOI: 10.1016/s0278-6915(03)00173-x] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.0] [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]
Abstract
This study was designed to evaluate the toxicogenetic or protective effect of cooked and dehydrated black beans (Phaseolus vulgaris L.) in bone marrow and peripheral blood cells of exposed mice. The frequency of micronuclei detected using the bone marrow erythrocyte micronucleus test and level of DNA lesions detected by the comet assay were chosen as end-points reflecting mutagenic and genotoxic damage, respectively. Initially, Swiss male mice were fed with a 20% black bean diet in order to detect mutagenic and genotoxic activity. However, no increase in the frequency of bone marrow micronucleated polychromatic erythrocytes (MN PCEs) or DNA lesion in leukocytes was observed. In contrast, received diets containing 1, 10 or 20% of black beans, a clear, but not dose-dependent reduction in the frequency of MN PCEs were observed in animals simultaneously treated with cyclophosphamide, an indirect acting mutagen. Similar results were observed in leukocytes by the comet assay. Commercial anthocyanin was also tested in an attempt to identify the bean components responsible for this protective effect. However, instead of being protective, the flavonoid, at the highest dose administered (50 mg/kg bw), induced primary DNA lesion, as detected by the comet assay. These data indicate the importance of food components in preventing genetic damage induced by chemical mutagens, and also reinforce the role of toxicogenetic techniques in protecting human health.
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Affiliation(s)
- L Azevedo
- Faculdade de Medicina de Itajubá, Curso de Nutrição, Rua Cel. Reno Junior, 328, Caixa Postal 25, 37500-000, Itajubá, MG, Brazil.
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Bellini MF, Giacomini NL, Eira AF, Ribeiro LR, Mantovani MS. Anticlastogenic effect of aqueous extracts of Agaricus blazei on CHO-k1 cells, studying different developmental phases of the mushroom. Toxicol In Vitro 2003; 17:465-9. [PMID: 12849730 DOI: 10.1016/s0887-2333(03)00043-2] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.4] [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]
Abstract
The Agaricus blazei Murill (ABM) mushroom, known as the sun mushroom, is native to Brazil and has become known for its medicinal properties. This study examined the anticlastogenic effect of Agaricus blazei in Chinese hamster ovary cells, CHO-k1, by means of a chromosome aberration test using methyl methanesulphonate (MMS, 10(-4)M) as the DNA damage inducing agent. Two mushroom lines were used, ABM 99/26 and ABM 97/11, and the latter was used in the young (Y) and sporulating (S) developmental phases. The cells were treated for 12 h with MMS alone or combined with aqueous extracts of A. blazei at a final concentration of 0.15%, which were prepared at three different temperatures: (a) hot (60 degrees C), (b) room temperature (25 degrees C) and (c) chilled (4 degrees C). Mushroom extracts showed a marked anticlastogenic effect against DNA damage, as evidenced by a decrease in the number of cells with breaks, regardless of the line used, or the developmental stage or the temperature at which the extract was prepared. Generally, the extracts were more effective in reducing the isochromatid type breaks. The data obtained suggest that extracts of A. blazei mushroom are anticlastogenic under the conditions tested, mainly during the G1 and S stages of the cell cycle, where chromosome breaks of the isochromatid type are produced by the MMS agent.
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Affiliation(s)
- M F Bellini
- Departamento de Biologia Geral - UEL, Londrina, Paraná, Brazil
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Luiz RC, Jordão BQ, da Eira AF, Ribeiro LR, Mantovani MS. Mechanism of anticlastogenicity of Agaricus blazei Murill mushroom organic extracts in wild type CHO (K(1)) and repair deficient (xrs5) cells by chromosome aberration and sister chromatid exchange assays. Mutat Res 2003; 528:75-9. [PMID: 12873725 DOI: 10.1016/s0027-5107(03)00098-8] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Agaricus blazei Murill is a medicinal mushroom native to Brazil. The present work assessed the clastogenic and anticlastogenic potential of organic extracts (ethanol and chloroform/methanol) from the lineage AB97/11 in chinese hamster CHO-K(1) (wild type) and CHO-xrs5 (repair deficient) cells using the chromosome aberration (CA) and sister chromatid exchange (SCE) assays. In these experimental conditions were observed: (a) anticlastogenic effect at concentrations of 0.06 and 0.09% of the EtOH extract and at the 0.03 and 0.06% concentrations of the C/MetOH extract in CHO-K(1); (b) absence of protector effect on CHO-xrs5 cells; and (c) absence of protector effect in the SCE assay. These results indicate that organic extracts of A. blazei lineage AB97/11 present bio-antimutagenic type protective activity.
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Affiliation(s)
- R C Luiz
- Departamento de Biologia Geral, Centro de Ciencias Biologicas (CCB), Universidade Estadual de Londrina, Campus Universitário, Cx. Postal 6001, CEP 86051-990 PR Londrina, Brazil
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Sugui MM, Alves de Lima PL, Delmanto RD, da Eira AF, Salvadori DMF, Ribeiro LR. Antimutagenic effect of Lentinula edodes (BERK.) Pegler mushroom and possible variation among lineages. Food Chem Toxicol 2003; 41:555-60. [PMID: 12615128 DOI: 10.1016/s0278-6915(02)00306-x] [Citation(s) in RCA: 26] [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: 11/18/2022]
Abstract
This study was performed to evaluate the efficiency of four different lineages (95/01, L1, 96/22 and JABK) of Lentinula edodes (BERK.) Pegler mushroom (shiitake) for inhibiting the N-ethyl-N-nitrosourea (ENU) clastogenicity in vivo. Male Swiss mice (10 animals/group) were treated during 15 consecutive days with dried mushroom added to basal diet under three different concentrations (1, 5 and 10%). At day 15, mice were intraperitoneally injected with ENU (50 mg/kg body weight) and sacrificed 24 h later for evaluation of micronucleated bone marrow polychromatic erythrocytes (MNPCE). Negative and positive controls (10 animals each), receiving basal diet and saline or ENU ip injection, respectively, were also evaluated. Results showed that pretreatments with diets containing the lineages 95/01, L1 and 96/22 reduce the frequencies of MNPCE induced by ENU. The absence of an antimutagenic activity for the lineage JABK might be related to intrinsic differences among the lineages such as biochemical composition. Taken together, our data show that the differences in protective activities of the mushrooms need to be clarified in further studies and the mechanisms for such activities need to be investigated.
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Affiliation(s)
- M M Sugui
- Faculdade de Medicina, UNESP, Botucatu, São Paulo, Brazil
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Alves de Lima RO, Azevedo L, Ribeiro LR, Salvadori DMF. Study on the mutagenicity and antimutagenicity of a natural food colour (annatto) in mouse bone marrow cells. Food Chem Toxicol 2003; 41:189-92. [PMID: 12480296 DOI: 10.1016/s0278-6915(02)00208-9] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [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: 10/27/2022]
Abstract
Most manufactured foods contain chemicals added as a deliberate part of the manufacturing process. The aims of the present study were to evaluate the mutagenicity and antimutagenicity of annatto, a natural pigment extracted from the Bixa orellana L. and widely used as a colorant in foods. The micronucleus test was performed in bone marrow cells from Swiss male mice treated with one of the three concentrations of annatto (1330, 5330 and 10,670 ppm), incorporated into the diet. The animals were fed with the diets for 7 days and sacrificed 24 h after the last treatment. For the evaluation of the antimutagenic potential of annatto, at day 7, the animals received an intraperitoneal injection of cyclophosphamide (50 mg/kg body weight). Under the concentrations tested annatto did not present mutagenic or antimutagenic activities on the mice bone marrow cells. However, an increased frequency of micronucleated cells was observed when the highest concentration (10,670 ppm) was administered simultaneously with cyclophosphamide. In conclusion, the data indicate that annatto colour, for the conditions used, is neither mutagenic nor an inhibitor of induced mutations, although it should be used carefully since high doses may increase the effect of a mutagen.
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Affiliation(s)
- R O Alves de Lima
- TOXICAN--Núcleo de Avaliação Toxicogenética e Cancerígena, Depto. de Patologia, Faculdade de Medicina-UNESP, Botucatu, SP, Brazil
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Martins de Oliveira J, Jordão BQ, Ribeiro LR, Ferreira da Eira A, Mantovani MS. Anti-genotoxic effect of aqueous extracts of sun mushroom (Agaricus blazei Murill lineage 99/26) in mammalian cells in vitro. Food Chem Toxicol 2002; 40:1775-80. [PMID: 12419691 DOI: 10.1016/s0278-6915(02)00156-4] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.9] [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: 11/20/2022]
Abstract
The "sun mushroom" is the popular name for the Agaricus blazei Murill fungus, a mushroom native to south-eastern Brazil, which has been frequently used in popular medicine mainly in the form of tea to treat various ailments (stress, diabetes, etc.). In the present study, the genotoxic and/or anti-genotoxic effects ofA. blazei on mammalian cells in culture was assessed by checking the increase or reduction of micronucleus (MN) frequency and comets. The sun mushroom (lineage 99/26) was used as aqueous extracts prepared (2.5%) at three different temperatures (60, 25 and 4 degrees C). The in vitro micronucleus (MN) test in binucleated cells and comet assay were used in V79 cells cultivated in HAM-F10+DMEM medium (1:1), supplemented with 10% of fetal bovine serum. The experiments were divided into four treatment types: 1. Negative control; 2. Positive control with MMS; 3. Treatments with the three forms of extracts (60, 25 and 4 degrees C); and 4. Treatments with the extracts in different associations (simultaneous, pre-treatment, post-treatment and simultaneous after pre-incubation for 1 h) with MMS. None of the A. blazei extracts show genotoxic activity. In the comet assay no protecting effect was found. The results obtained in the MN test showed that the three forms of extracts used had protective activity, suggesting that the compound or active ingredients of A. blazei are always present in these extracts. The greater protective efficiency of the simultaneous treatment and simultaneous treatment with pre-incubation mixture with MMS suggests that the extracts have an antimutagenic action of the desmutagenic type.
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Affiliation(s)
- J Martins de Oliveira
- Departamento de Biologia Geral CCB, Universidade Estadual de Londrina, Campus Universitário, Cx Postal 6001, Londrina, PR, Brazil
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Barbisan LF, Miyamoto M, Scolastici C, Salvadori DMF, Ribeiro LR, Eira AF, de Camargo JLV. Influence of aqueous extract of Agaricus blazei on rat liver toxicity induced by different doses of diethylnitrosamine. J Ethnopharmacol 2002; 83:25-32. [PMID: 12413704 DOI: 10.1016/s0378-8741(02)00171-x] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The modifying potential of prior administration of an aqueous extract of the mushroom Agaricus blazei Murrill (Agaricaceae) (Ab) on hepatotoxicity induced by different doses of diethylnitrosamine (DEN) in male Wistar rats was evaluated. During 2 weeks, animals of groups G3 (Ab+DEN(50)), G5 (Ab+DEN(100)), G7 (Ab+DEN(200)), and G8 (Ab-treated) were treated with the A. blazei through drinking water. After this period, groups G2 (DEN(50)), G3 (Ab+DEN(50)), G4 (DEN(100)) G5 (Ab+DEN(100)), G6 (DEN(200)), and G7 (Ab+DEN(200)) were given a single i.p. injection of 50, 100 and 200 mg/kg of DEN, respectively, while groups G1 (non-treated) and G8 (Ab-treated) were treated with 0.9% NaCl only. All animals were killed 48 h after DEN or NaCl treatments. The hepatocyte replication rate was estimated by the index of the proliferating cell nuclear antigen (PCNA) positive hepatocytes and the appearance of putative preneoplastic hepatocytes through expression of the enzyme glutathione S-transferase placental form (GST-P). After DEN-treatment, ALT levels, PCNA labeling index, and the number of GST-P positive hepatocytes were lower in rats that received A. blazei treatment and were exposed to 100 mg/kg of DEN. Our findings suggest that previous treatment with A. blazei exerts a hepatoprotective effect on both liver toxicity and hepatocarcinogenesis process induced by a moderately toxic dose of DEN.
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Affiliation(s)
- L F Barbisan
- Departamento de Morfologia, Instituto de Biologia, UNESP, Botucatu 18618-000, SP, Brazil
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Delmanto RD, de Lima PL, Sugui MM, da Eira AF, Salvadori DM, Speit G, Ribeiro LR. Antimutagenic effect of Agaricus blazei Murrill mushroom on the genotoxicity induced by cyclophosphamide. Mutat Res 2001; 496:15-21. [PMID: 11551476 DOI: 10.1016/s1383-5718(01)00228-5] [Citation(s) in RCA: 95] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Agaricus blazei Murrill extracts have previously been shown to have anticarcinogenic and antimutagenic properties. These results suggest that antimutagenic activity, besides the modulation of the immune system, might be involved in the anticarcinogenic action of A. blazei. To investigate the possible antimutagenic effect of A. blazei in vivo, we evaluated its effect on clastogenicity induced by cyclophosphamide (CP) in mice, using the micronucleus test in bone marrow (MNPCE) and in peripheral blood (MNRET). Male Swiss mice were treated with CP (25 or 50mg/kg i.p.) or with CP plus mushroom solution at three different temperatures: 4, 21, and 60 degrees C. Aqueous solution of a mixture from various lineages of the mushroom inhibited induction of micronuclei by CP in bone marrow and in peripheral blood of mice. In contrast to the mixture of lineages, a single isolated lineage did not lead to a reduction of CP-induced MN frequencies in either bone marrow or blood cells of mice. The results suggest that under certain circumstances these mushrooms exhibit antimutagenic activities that might contribute to an anticarcinogenic effect.
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Affiliation(s)
- R D Delmanto
- Departamento de Patologia, Faculdade de Medicina, UNESP, 18618-000, SP, Botucatu, Brazil
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38
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Abstract
Agaricus blazei Murrill, a native mushroom in Brazil, has been widely consumed in different parts of the world due to its medicinal power. Its anticarcinogenic activity has been shown in experimental animals, and antimutagenic activity has been demonstrated only in Salmonella. In this work, the mutagenic and antimutagenic activities of mushroom teas of strains AB96/07, AB96/09 and AB97/11 were evaluated in Chinese hamster V79 cells, using the comet assay and the micronucleus test. The cells were treated with three different concentrations (0.05, 0.1 and 0.15) of teas prepared from a 2.5% aqueous solution, under three different temperatures: (1) room (20-25 degrees C); (2) ice-cold (2-8 degrees C); and (3) warm (60 degrees C). The teas were applied in co-, pre- and post-treatments in combination with the mutagen methyl methanesulfonate (MMS; 1.6x10(-4) and 4x10(-4)M). The duration of the treatment was 1h in the comet assay and 2h in the micronucleus test. The results showed that the mushroom was not mutagenic itself. Nevertheless, the mushroom is an efficient antimutagen against the induction of micronuclei by MMS in all concentrations and preparations tested. The observed reductions in the frequencies of micronuclei ranged from 61.5 (room temperature 0.1% tea in post-treatment) to 110.3% (co-treatment with warm and ice-cold 0.15% tea). In the comet assay, the antimutagenic activity was detected only when the cells were pre-treated with the following teas: warm 0.1 and 0.15%, room temperature 0.05% and ice-cold 0.1%. The results indicate that the mushroom A. blazei extracts are antimutagenic when tested in V79 cells.
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Affiliation(s)
- R C Menoli
- Departamento de Biologia Geral, Universidade Estadual de Londrina, Campus Universitário, Caixa Postal 6001, 86.051-990, PR, Londrina, Brazil
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de Lima PL, Delmanto RD, Sugui MM, da Eira AF, Salvadori DM, Speit G, Ribeiro LR. Letinula edodes (Berk.) Pegler (Shiitake) modulates genotoxic and mutagenic effects induced by alkylating agents in vivo. Mutat Res 2001; 496:23-32. [PMID: 11551477 DOI: 10.1016/s1383-5718(01)00215-7] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [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: 11/25/2022]
Abstract
We evaluated the antimutagenic effect of Letinula edodes (Berk.) Pegler (Shiitake) on the frequency of micronuclei in mice treated with N-ethyl-N-nitrosourea (ENU) or cyclophosphamide (CP). Mice were orally (gavage) pretreated for 15 consecutive days with solutions of Shiitake (0.6 ml per day, gavage) prepared at three different temperatures: 4, 21 (RT), and 60 degrees C. Then, the animals were intraperitoneally injected on day 15 with CP (25 or 50mg/kg) or ENU (50 mg/kg) and killed 24 or 48 h after treatment for evaluation of micronucleated polychromatic erythrocytes (MNPCEs) in bone marrow and micronucleated reticulocytes (MNRETs). A mixture of L. edodes lineages (LE 95/016, 96/14, 96/17, 96/22, 96/23, 97/27, and 97/28) significantly decreased the frequencies of MNPCEs and MNRETs induced by CP (25 and 50mg/kg). When a single lineage from the mixture (LE 96/17) was tested we also found a significant reduction in the frequencies of MNPCEs and MNRETs induced by both CP or ENU (50mg/kg). The comet assay was also performed 3h after ENU treatment using mice pretreated with the single lineage (LE 96/17) of L. edodes. The results showed a high degree of variability with some indications of an antigenotoxic effect. Taken together, our data show that solutions from Shiitake inhibit in vivo mutagenicity of CP and ENU.
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Affiliation(s)
- P L de Lima
- Departamento de Patologia, Faculdade de Medicina, UNESP, 18618-000, SP, Botucatu, Brazil
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Salvadori DM, Barbisan LF, Bazo AP, de Santana EQ, Denadai R, de Oliveira SV, Ribeiro LR, de Camargo JL. Cocaine mutagenicity and hepatocarcinogenicity evaluations in rodents. Teratog Carcinog Mutagen 2000; 18:199-208. [PMID: 9804275 DOI: 10.1002/(sici)1520-6866(1998)18:4<199::aid-tcm5>3.0.co;2-s] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The mutagenicity (clastogenicity) and the carcinogenicity (promoting potential) of cocaine were evaluated, respectively, by the mouse bone marrow micronucleus test (study I) and by the initiated rat liver bioassay (study II). In study I, two administration routes (i.p. and i.v.) and two sampling times (24 and 48 hours) after cocaine treatment were studied. Swiss male mice were treated with cocaine at doses of 0, 18, 37, and 75 mg/kg and 0, 2, 4, and 8 mg/kg by i.p. and i.v. routes, respectively. No significant differences were observed between treated and negative control groups regarding the frequencies of micronuclei and the polichromatic/normochromatic erythrocyte (PCE/NCE) ratios. In study II, the development of putative preneoplastic foci of hepatocytes expressing the enzyme glutathione S-transferase placental form (GST-P+) was utilized as the end-point marker in a 8-week rat liver bioassay. The animals were initiated for carcinogenesis by a single i.p. sub-carcinogenic dose of diethylnitrosamine (DEN). After a 6-week exposure to 5 or 10 mg/kg of cocaine i.v. twice a week there was no enhancement of GST-P+ foci development above the values of the control DEN-only treated animals. Also, cocaine did not induce any toxicity as evidenced by the absence of alterations of rat body and liver weights and of liver biochemical function and morphology. The results suggest that cocaine does not have a mutagenic effect on the mouse bone marrow cells or promoting activity on the rat hepatocarcinogenesis process.
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Affiliation(s)
- D M Salvadori
- Departamento de Patologia, Faculdade de Medicina, UNESP, Botucatu, SP, Brazil
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Spinardi AL, Kaneno R, Rodrigues MA, Salvadori DM, Rocha NS, Barbisan LF, Ribeiro LR, de Camargo JL. Natural killer activity in a medium-term multi-organ bioassay for carcinogenesis. Jpn J Cancer Res 1999; 90:101-7. [PMID: 10076572 PMCID: PMC5925978 DOI: 10.1111/j.1349-7006.1999.tb00672.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Natural killer (NK) cell activity was evaluated after the initiation and promotion steps in a medium-term multi-organ bioassay for carcinogenesis. NK cell activity was assessed in vitro by Cr51 release assay at the 4th and 30th weeks of the experiment. Male Wistar rats were sequentially initiated with N-diethylnitrosamine (DEN i.p.), N-butyl-N-(4-hydroxybutyl)nitrosamine (BBN drinking water), N-methyl-N-nitrosourea (MNU i.p.), dihydroxy-di-N-propylnitrosamine (DHPN drinking water) and N,N'-dimethylhydrazine (DMH s.c.) at subcarcinogenic doses for 4 weeks (DMBDD initiation). One group was evaluated at the 4th week and the other was maintained without any further treatment until the 30th week. Two initiated groups were exposed through the diet to 2-acetylaminofluorene (2-AAF) or phenobarbital (PB), from the 6th until the 30th week. Five additional groups were studied to evaluate the effects of each initiator on NK activity. All groups submitted to initiation only, initiation plus promotion, or promotion only, developed significantly more preneoplastic lesions than the untreated control group. The main target organs for tumor development in the initiated animals were the liver and the colon, irrespective of treatment with 2-AAF or PB. NK cell activity was not affected by exposure to genotoxic carcinogens after initiation, at the 4th week. Treatments only with PB or 2-AAF did not change NK cell activity. However, decreased NK cell activity was registered in the group only initiated with DMBDD and in the group given DMBDD+2-AAF. This late depression of NK cell activity at the 30th week could be related to the production of suppressing molecules by the tumor cells.
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Affiliation(s)
- A L Spinardi
- Department of Pathology, Faculty of Medicine, UNESP, Brazil
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Abstract
In the present paper, the protective effect of beta-carotene was evaluated after whole body exposure of mice to 2 Gy of X-rays. Splenocytes, reticulocytes, bone marrow cells and spermatids were evaluated for the frequency of micronuclei (MN) induced by X-rays. Mice were treated (gavage) with beta-carotene (10, 25 and 50 mg/kg b.w.) for 5 consecutive days and, 4 h after the last treatment, the animals were irradiated. The results obtained showed different frequencies of X-ray-induced-MN between different cell populations analysed and also different response of these cells to the beta-carotene treatment. The radioprotective effect of beta-carotene was observed in splenocytes, reticulocytes, and spermatids but not in bone marrow cells. No dose-response relationship for beta-carotene was detected. The time of sampling, the sensitivity of the cells as well as the antioxidant activity of beta-carotene are discussed as important factors for the radioprotective action of this provitamin.
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Affiliation(s)
- D M Salvadori
- Departamento de Patologia, Faculdade de Medicina, Universidade Estadual Paulista-UNESP, Botucatu, Brasil
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Abstract
The genotoxic potential of paraquat was evaluated in mouse somatic (bone marrow) and germ (spermatozoa) cells. Two exposure schedules were conducted: single and multiple treatment. Only for multiple treatment was an increased frequency of chromosomal aberrations observed. In germ cells, paraquat induced an increase of sperm-shape abnormalities when the animals were treated at three stages of cell development: spermatozoa, spermatid and preleptotene spermatogonial cells. These toxicogenetic effects might be attributed to the ability of paraquat to generate oxygen free radicals.
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Affiliation(s)
- A C Rios
- Laboratory of Toxicology and Genetic Toxicology, School of Veterinary Science, Federal University of Bahia, Salvador-BA, Brazil
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van Delft JH, van Winden MJ, Luiten-Schuite A, Ribeiro LR, Baan RA. Comparison of various immunochemical assays for the detection of ethylene oxide-DNA adducts with monoclonal antibodies against imidazole ring-opened N7-(2-hydroxyethyl)guanosine: application in a biological monitoring study. Carcinogenesis 1994; 15:1867-73. [PMID: 7923579 DOI: 10.1093/carcin/15.9.1867] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [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: 01/27/2023] Open
Abstract
Monoclonal antibodies have been developed for the analysis of the predominant lesion in DNA induced by ethylene oxide (EtOx), namely N7-(2-hydroxyethyl)guanine (N7-EtOHGua). Two monoclonal antibodies raised against imidazole ring-opened N7-(2-hydroxyethyl)guanine (RON7-EtOHGua), N7EO-E and N7EO-11, and the previously isolated antibody N7E-102 were characterized by competitive ELISA with various inhibitors. N7EO-E and N7EO-11 recognize 2-hydroxyethyl lesions better than ethyl or methyl lesions, while N7E-102 recognizes 2-hydroxyethyl and ethyl modifications equally well. All antibodies show a preference for imidazole ring-opened adducts, bind better to adducts in DNA compared to alkylated nucleosides or bases and bind 10(6)- to 3 x 10(6)-fold less well to unmodified DNA. The sensitivity of detection of RON7-EtOHGua in DNA and in the nuclei of cells in situ by antibody N7EO-E was investigated in several assays. The immunoslot blot assay was the most sensitive method (0.34 RON7-EtOHGua per 10(6) nucleotides was detectable), followed by competitive ELISA, direct ELISA and in situ detection by immunofluorescence microscopy. The immunoslot blot assay was used to analyse N7-EtOHGua levels in white blood cell DNA from individuals exposed to EtOx (2-5 p.p.m.) and of controls. This exposure did not result in a statistically significant increase in the N7-EtOHGua level.
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Affiliation(s)
- J H van Delft
- TNO Nutrition and Food Research Institute, Department of Genetic Toxicology, Rijswijk, The Netherlands
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45
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Ribeiro LR, Salvadori DM, Rios AC, Costa SL, Tates AD, Törnqvist M, Natarajan AT. Biological monitoring of workers occupationally exposed to ethylene oxide. Mutat Res 1994; 313:81-7. [PMID: 8047079 DOI: 10.1016/0165-1161(94)90035-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.8] [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: 01/28/2023]
Abstract
Ethylene oxide (EtO) is an important intermediate industrial chemical which is also used for sterilizing medical products and hospital equipment. In the present study we have evaluated some biological markers, such as chromosomal aberrations, micronuclei and EtO-hemoglobin adducts in the peripheral blood cells, and micronuclei in buccal exfoliated cells of 22 controls and 75 workers employed in an industry in Brazil using EtO as an intermediate. Measurements of EtO in the general area showed that workers were exposed to 2-5 ppm time-weighted average (TWA) for an 8-h working day, during the 3-month sampling. Our results indicate that exposure to EtO resulted in a statistically significant enhancement of chromosomal aberrations (P = 0.01) and of micronuclei in binucleated lymphocytes (P < 0.001). For the frequencies of micronucleated cells in buccal mucosa there was no statistically significant difference between exposed and control groups. The mean values of hemoglobin adduct (HOEtVal) measurements obtained from a selected group of exposed and unexposed donors were statistically different.
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Affiliation(s)
- L R Ribeiro
- Laboratory of Toxicology & Genetic Toxicology, Federal University of Bahia, Salvador, Brazil
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Salvadori DM, Ribeiro LR, Natarajan AT. Effect of beta-carotene on clastogenic effects of mitomycin C, methyl methanesulphonate and bleomycin in Chinese hamster ovary cells. Mutagenesis 1994; 9:53-7. [PMID: 7516036 DOI: 10.1093/mutage/9.1.53] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [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: 01/25/2023] Open
Abstract
The effect of beta-carotene on the frequencies of micronuclei (MN) induced in cytochalasin blocked binucleated Chinese hamster ovary cells (CHO) by a bifunctional alkylating agent mitomycin C (MMC), a monofunctional alkylating agent methyl methanesulphonate (MMS) and a radio-mimetic agent bleomycin (BLEO) was investigated. Four different modes of application of the combination of clastogens and beta-carotene were examined (pre-treatment, simultaneous treatment, pre- +simultaneous treatment and post-treatment). The results obtained showed no effect of beta-carotene on the frequencies of MN induced by MMS, a slight but not statistically significant reduction of MMC-induced MN only when beta-carotene was used in low concentrations (0.25 and 0.5 microM) and a potentiation of the clastogenicity of bleomycin by beta-carotene in three of the treatment regimes utilized, post-treatment being ineffective. On the basis of these results it can be concluded that the effect of beta-carotene on clastogenesis induced by chemicals depends on the type and mechanism of action of the clastogen used as well as the treatment protocol employed.
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Affiliation(s)
- D M Salvadori
- MGC Department of Radiation Genetics and Chemical Mutagenesis, Sylvius Laboratory, State University of Leiden, The Netherlands
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Abstract
The efficiency of beta-carotene as a modulatory agent against clastogenicity induced by cyclophosphamide (CPA), an indirect-acting mutagen, and mitomycin C (MMC), a direct-acting mutagen, was evaluated in human hepatoma cells (Hep G2) using three different treatment regimes. Six doses of beta-carotene, 0.25, 0.5, 1.0, 2.0, 4.0 and 6.0 microM, were tested as pre-treatment, simultaneous treatment and pre- + simultaneous treatment. Since these cells are able to activate mutagens without any exogenous metabolizing system (S9 mix), some problems related to the use of S9 mix were eliminated. The data obtained show a statistically significant decrease in the frequency of micronuclei (MN) induced by CPA when the cells were treated with beta-carotene, for all treatments, and no effect of this provitamin on the clastogenicity of MMC was found. These results reinforce the anticlastogenicity of beta-carotene showing that its action is independent of the treatment regime used. On the other hand, the fact that beta-carotene had a protective action only on CPA-induced MN suggests an effect on activation of the promutagen and emphasizes the important utility of cell lines capable of metabolizing chemical mutagens, in such basic studies.
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Affiliation(s)
- D M Salvadori
- Laboratory of Toxicology and Genetic Toxicology, School of Veterinary, Federal University of Bahia, Salvador, BA, Brazil
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Ribeiro LR, Silva AR, Bautista AR, Costa SL, Sales LA, Rios AC, Salvadori DM. Clastogenic effect of extracts obtained from Crotalaria retusa L. and Crotalaria mucronata Desv. on mouse bone marrow cells. Mutat Res 1993; 300:253-8. [PMID: 7687026 DOI: 10.1016/0165-1218(93)90058-l] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [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: 01/26/2023]
Abstract
This work has evaluated the clastogenicity of six extracts (tea and aqueous extract of leaves, tea, aqueous and methanolic extracts of dried fruit, and tea of unripe fruit) obtained from Crotalaria retusa L. and three extracts (tea and methanolic extract of dried fruit, and tea of unripe fruit) obtained from Crotalaria mucronata Desv. The extracts were injected intraperitoneally into mice, and the animals were killed 24 h after treatment for preparation of bone marrow cells. The extracts obtained from fruits of Crotalaria retusa were found to cause a dose-dependent increase in the frequency of chromosomal aberrations in mice. On the other hand, no statistically significant increase in the frequency of aberrant cells was observed for the animals treated with leaf extracts obtained from Crotalaria retusa and with extracts from fruits of Crotalaria mucronata. The possibility that the pyrrolizidine alkaloid, monocrotaline, present in Crotalaria retusa exerts a clastogenic effect on mouse bone marrow cells is discussed. Our conclusion is based on studies using intraperitoneal treatments. Effects of oral exposure to extracts of Crotalaria retusa are unknown.
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Affiliation(s)
- L R Ribeiro
- Laboratório de Toxicologia e Genética Toxicológica, Universidade Federal da Bahia, Salvador, BA, Brazil
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49
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Abstract
The influence of beta-carotene on the clastogenicity of the indirect-acting mutagen cyclophosphamide (CPA) was investigated in mice, in vivo, for the induction of chromosome aberrations in bone marrow cells (BM). beta-Carotene (0.5, 1.0, 2.0, 5.0, 10, 25, 50, 100 and 200 mg/kg) was administered by gavage for 5 consecutive days. 4 h after the last treatment with beta-carotene, the mice were injected intraperitoneally with CPA, and the BM cells were fixed after 16, 24 and 32 h for the evaluation of the frequency of chromosome aberrations. The results showed that beta-carotene was effective in reducing chromosomal damage induced by CPA with the increase of its concentration up to a level after which this effect was not observed. This anticlastogenicity was better detected when the cells were fixed at 32 h, although a tendency in reducing the CPA clastogenicity was already observed at 16 and 24 h. Our results suggest that beta-carotene provides significant protection against the genotoxicity of CPA, although no dose-effect relationship on the frequencies of cells with chromosomal aberrations was observed.
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Affiliation(s)
- D M Salvadori
- Laboratório de Toxicologia e Genética Toxicológica, Escola de Medicina Veterinária, Universidade Federal da Bahia, Ondina, Salvador, Brazil
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Ribeiro LR, Bautista AR, Silva AR, Sales LA, Salvadori DM, Maia PC. Toxicological and toxicogenetic effects of plants used in popular medicine and in cattle food. Mem Inst Oswaldo Cruz 1991; 86 Suppl 2:89-91. [PMID: 1842020 DOI: 10.1590/s0074-02761991000600022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Toxicological and toxicogenetic effects of aqueous (tea) and hexanic fruit extract of Indigofera suffruticosa Mill. and hydroalcoholic root extract of Solanum agrarium Stendt. were evaluated in Balb C male mice intraperitoneally exposed. A hepatotoxic effect was observed just for animals treated with aqueous fruit extract of I. suffruticosa. In relation to the toxicogenetic effect, just the group treated with 12.5% of toxic dose of aqueous fruit extract of I. suffruticosa showed a statistically significant increase in the frequency of cells with chromosome aberrations (cytogenetic effect), although a slight increase was also observed for the highest dose (25% of LD50) of hydroalcoholic root extract of S. agrarium. The results obtained show that before S. agrarium is used as medicine and before the wide use of I. suffruticosa in cattle food, careful evaluation must be done.
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Affiliation(s)
- L R Ribeiro
- Laboratório de Genética Toxicológica, Escola de Medicina Veterinária, UFBA, Salvador, Brasil
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