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Whitwell J, Smith R, Chirom T, Watters G, Hargreaves V, Lloyd M, Phillips S, Clements J. Inclusion of an extended treatment with recovery improves the results for the human peripheral blood lymphocyte micronucleus assay. Mutagenesis 2019; 34:217-237. [PMID: 31209484 DOI: 10.1093/mutage/gez011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Revised: 03/22/2019] [Accepted: 05/03/2019] [Indexed: 12/19/2022] Open
Abstract
The in vitro micronucleus (IVMN) test was endorsed for regulatory genotoxicity testing with adoption of the Organisation for Economic Co-operation and Development (OECD) test guideline (TG) 487 in 2010. This included two equally acceptable options for extended treatment in the absence of metabolic activation: a treatment for 1.5-2.0 cell cycles with harvest at the end of treatment (Option A) or treatment for 1.5-2.0 cell cycles followed by recovery for 1.5-2.0 cell cycles prior to harvest (Option B). Although no preferences were discussed, TG 487 cautions that Option B may not be appropriate for stimulated lymphocytes where exponential growth may be declining at 96 h after phytohaemagglutinin (PHA) stimulation. Following revision of TG 487 in 2014 and 2016, emphasis has been placed on using Option A. Given the purpose of the IVMN assay is to determine both clastogenic and aneugenic potential, the authors believe the assay is compromised if an extended treatment with recovery is not included for sensitive detection of certain classes of chemical. In this study, average generation time (via bromodeoxyuridine incorporation) of human peripheral blood lymphocytes (HPBL) was measured up to 144 h after PHA stimulation. In addition, the HPBL micronucleus (MN) assay was performed using Option A and B treatment schedules. Cytotoxicity (replication index) and MN induction were determined following treatment with 14 chemicals. The data demonstrate that lymphocytes actively divide beyond 96 h after PHA stimulation. Furthermore, MN induction was only observed with some aneugenic chemicals and nucleoside analogues in HPBLs following extended treatment with a recovery period. For the majority of chemicals tested the magnitude of MN induction was generally greater and MN induction was observed across a wider concentration range following the Option B treatment schedule. In addition, steep concentration-related toxicity following treatment without recovery is more common, making selection of suitable concentrations (within regulatory toxicity limits) for MN analysis challenging.
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Affiliation(s)
- James Whitwell
- Covance Laboratories Ltd, Genetic Toxicology, Harrogate, North Yorkshire, UK
| | - Robert Smith
- Covance Laboratories Ltd, Genetic Toxicology, Harrogate, North Yorkshire, UK
| | - Teresa Chirom
- Covance Laboratories Ltd, Genetic Toxicology, Harrogate, North Yorkshire, UK
| | - Gary Watters
- Covance Laboratories Ltd, Genetic Toxicology, Harrogate, North Yorkshire, UK
| | - Victoria Hargreaves
- Covance Laboratories Ltd, Genetic Toxicology, Harrogate, North Yorkshire, UK
| | - Mel Lloyd
- Covance Laboratories Ltd, Genetic Toxicology, Harrogate, North Yorkshire, UK
| | - Sarah Phillips
- Covance Laboratories Ltd, Genetic Toxicology, Harrogate, North Yorkshire, UK
| | - Julie Clements
- Covance Laboratories Ltd, Genetic Toxicology, Harrogate, North Yorkshire, UK
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52
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Micronucleus Analysis by Flow Cytometry. Methods Mol Biol 2019. [PMID: 31473960 DOI: 10.1007/978-1-4939-9646-9_9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
During the last two decades the micronucleus (MN) test has been extensively used as a genotoxicity screening tool of chemicals and in a variety of exploratory and mechanistic investigations. The MN is a biomarker for chromosomal damage or mitotic abnormalities since it can originate from chromosome fragments or whole chromosomes that fail to be incorporated into daughter nuclei during mitosis (Fenech et al., Mutagenesis 26: 125-132, 2011; Kirsch-Volders et al., Arch Toxicol 85: 873-899, 2011). The simplicity of scoring, accuracy, amenability to automation by image analysis or flow cytometry and the readiness to be applied to a variety of cell types either in vitro or in vivo made it a versatile tool that contributed to a large extent in our understanding of key toxicological issues related to genotoxins and their effects at the cellular and organism levels. Recently, the final acceptance of the in vitro MN test Organization for Economic Cooperation and Development (OECD) guideline 487 (OECD, Guideline for testing of chemicals: in vitro mammalian cell micronucleus test 487: in vitro mammalian cell micronucleus test (MNVIT). Organization for Economic Cooperation and Development, Paris, 2010) together with the standard in vivo MN test OECD guideline 474 (OECD, Guideline for the testing of chemicals no. 474 mammalian erythrocyte micronucleus test. Organization for Economic Cooperation and Development, Paris, 1997) further positioned the assay as a key driver in the determination of the genotoxicity potential in exploratory research as well as in the regulatory environment. This book chapter covers to some extent the protocol designs and experimental steps necessary for a successful performance of the MN test and an accurate analysis of the MN by the flow cytometry technique.
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Felzenszwalb I, Fernandes ADS, Brito LB, Oliveira GAR, Silva PAS, Arcanjo ME, Marques MRDC, Vicari T, Leme DM, Cestari MM, Ferraz ERA. Toxicological evaluation of nail polish waste discarded in the environment. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:27590-27603. [PMID: 29619636 DOI: 10.1007/s11356-018-1880-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Accepted: 03/26/2018] [Indexed: 06/08/2023]
Abstract
Nail polish has been widely used around the world. However, the hazards of nail polishes discarded in the environment are still poorly investigated. Thus, the toxicogenetic effects of solubilized (SE) and leached (LE) extracts from nail polishes were investigated, simulating their disposal on water and landfill, respectively, and identifying their physicochemical properties and chemical constituents. Organic compounds and metals were detected in both extracts. SE and LE only induced mutagenic effects in TA98 Salmonella strain in the presence and absence of exogenous metabolic activation. Although both extracts did not significantly increase the frequency of micronucleated HepG2 cells, the cell viability was affected by 24-h exposure. No DNA damage was observed in gonad fish cells (RTG-2) exposed to both extracts; however, the highest SE and LE concentrations induced significant lethal and sublethal effects on zebrafish early-life stages during 96-h exposure. Based on our findings, it can be concluded that if nail polishes enter aquatic systems, it may cause negative impacts to the environment.
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Affiliation(s)
- Israel Felzenszwalb
- Department of Biophysics and Biometry, Rio de Janeiro State University, Rio de Janeiro, RJ, Brazil
| | | | - Lara Barroso Brito
- Faculty of Pharmacy, Federal University of Goiás (UFG), Goiânia, GO, Brazil
| | | | - Paula Aquino Soeiro Silva
- Department of Pharmacy and Pharmaceutical Administration, Pharmacy College, Fluminense Federal University, Rua Mário Viana, 523, Santa Rosa, CEP 24, Niterói, RJ, 241-000, Brazil
| | - Maria Elena Arcanjo
- Department of Organic Chemistry, Rio de Janeiro State University, Rio de Janeiro, RJ, Brazil
| | | | - Taynah Vicari
- Department of Genetics, Federal University of Paraná (UFPR), Curitiba, PR, Brazil
| | - Daniela Morais Leme
- Department of Genetics, Federal University of Paraná (UFPR), Curitiba, PR, Brazil
| | | | - Elisa Raquel Anastacio Ferraz
- Department of Pharmacy and Pharmaceutical Administration, Pharmacy College, Fluminense Federal University, Rua Mário Viana, 523, Santa Rosa, CEP 24, Niterói, RJ, 241-000, Brazil.
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El-Garawani IM, El-Nabi SH, Dawoud GT, Esmail SM, Abdel Moneim AE. Triggering of apoptosis and cell cycle arrest by fennel and clove oils in Caco-2 cells: the role of combination. Toxicol Mech Methods 2019; 29:710-722. [PMID: 31364915 DOI: 10.1080/15376516.2019.1650149] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Background: Fennel (Foeniculum vulgare) and clove (Syzygium aromaticum) oils are known for their various biological effects, including anticancer properties. Objective: To investigate the anticancer effect of combined fennel and clove oil treatment on Caco-2 cells and normal human lymphocytes (NHL). Methods: GC-MS, in vitro cytotoxicity, morphological, apoptosis-related marker, and flow cytometric cell cycle distribution analyses were conducted. Results: Seventeen volatile compounds were identified in fennel oil, including trans-anethole (68.3%) and (+)-fenchone (8.1%). In clove oil, 22 compounds, including eugenol (71.4%) and caryophyllene (8.7%), were identified. IC50 of the fennel, clove, and oil mixture were 300 ± 5.0, 150 ± 4.0, and 73 ± 2.5 µg/mL, respectively with combination index (CI) < 1.0. Mechanistic anticancer properties were investigated using 30, 45, and 60 µg/mL oil mixture. Analysis of apoptotic morphology, flow cytometric cell cycle distribution, and apoptosis-related markers, such as Bcl-2 and Ki-67, confirmed cell cycle arrest and apoptosis induction in Caco-2 cells by the fennel and clove oil combination. Moreover, the oil mixture did not exert significant (p < 0.01) toxicity on NHL in vitro. Conclusion: The oil mixture exerted selective cytotoxicity towards Caco-2 cells through cell cycle arrest and apoptosis, which may occur through synergistic effects between fennel and clove oil active ingredients.
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Affiliation(s)
- Islam M El-Garawani
- Department of Zoology, Faculty of Science, Menoufia University , Menoufia , Egypt
| | - Sobhy Hassab El-Nabi
- Department of Zoology, Faculty of Science, Menoufia University , Menoufia , Egypt
| | - Gouda T Dawoud
- Phytochemistry Department, Applied Research Center for Medicinal Plant, Ministry of Health, National Organization for Drug Control and Research (NODCAR) , Giza , Egypt
| | - Shaimaa M Esmail
- Department of Zoology, Faculty of Science, Menoufia University , Menoufia , Egypt
| | - Ahmed E Abdel Moneim
- Department of Zoology and Entomology, Faculty of Science, Helwan University , Cairo , Egypt
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Bernacki DT, Bryce SM, Bemis JC, Dertinger SD. Aneugen Molecular Mechanism Assay: Proof-of-Concept With 27 Reference Chemicals. Toxicol Sci 2019; 170:382-393. [PMID: 31132080 PMCID: PMC6657583 DOI: 10.1093/toxsci/kfz123] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
A tiered bioassay and data analysis scheme is described for elucidating the most common molecular targets responsible for chemical-induced in vitro aneugenicity: tubulin destabilization, tubulin stabilization, and inhibition of mitotic kinase(s). To evaluate this strategy, TK6 cells were first exposed to each of 27 presumed aneugens over a range of concentrations. After 4 and 24 h of treatment, γH2AX, p53, phospho-histone H3 (p-H3), and polyploidization biomarkers were evaluated using the MultiFlow DNA Damage Assay Kit. The assay identified 27 of 27 chemicals as genotoxic, with 25 exhibiting aneugenic signatures, 1 aneugenic and clastogenic, and 1 clastogenic. Subsequently, a newly described follow-up assay was employed to investigate the aneugenic agents' molecular targets. For these experiments, TK6 cells were exposed to each of 26 chemicals in the presence of 488 Taxol. After 4 h, cells were lysed and the liberated nuclei and mitotic chromosomes were stained with a nucleic acid dye and labeled with fluorescent antibodies against p-H3 and Ki-67. Flow cytometric analyses revealed that alterations to 488 Taxol-associated fluorescence were only observed with tubulin binders-increases in the case of tubulin stabilizers, decreases with destabilizers. Mitotic kinase inhibitors with known Aurora kinase B inhibiting activity were the only aneugens that dramatically decreased the ratio of p-H3-positive to Ki-67-positive nuclei. Unsupervised hierarchical clustering based on 488 Taxol fluorescence and p-H3: Ki-67 ratios clearly distinguished compounds with these disparate molecular mechanisms. Furthermore, a classification algorithm based on an artificial neural network was found to effectively predict molecular target, as leave-one-out cross-validation resulted in 25/26 agreement with a priori expectations. These results are encouraging, as they suggest that an adequate number of training set chemicals, in conjunction with a machine learning algorithm based on 488 Taxol, p-H3, and Ki-67 responses, can reliably elucidate the most commonly encountered aneugenic molecular targets.
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56
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Von Trompowsky ACM, Conde TR, Lemos RC, Quaresma BMC, Pitombeira MCS, de Carvalho AS, Boechat N, Salomão K, de Castro SL, Zamith HPDS. In vitro genotoxicity of nitroimidazoles as a tool in the search of new trypanocidal agents. Mem Inst Oswaldo Cruz 2019; 114:e190017. [PMID: 31271593 PMCID: PMC6598759 DOI: 10.1590/0074-02760190017] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Accepted: 05/28/2019] [Indexed: 11/21/2022] Open
Abstract
BACKGROUND Only benznidazole (Bnz) (1) and nifurtimox (Nfx) (2) are licensed for the
treatment of Chagas disease although their safety and efficacy profile are
far from ideal. Farmanguinhos from Fiocruz has developed seven
nitroimidazole compounds (4-10) analogs of megazol (3). OBJECTIVES To evaluate whether the genotoxic effect of 3 was abolished in the seven
nitroimidazoles (4-10) analogs using the in vitro alkaline
comet assay (CA) and the in vitro cytokinesis-block
micronucleus assay (CBMN) in whole human blood cells (WHBC) and correlate
this effect with their trypanocidal activity using bloodstream
trypomastigote forms of Trypanosoma cruzi. METHODS The toxicity of 3-10 to WHBC in the in vitro CA was
determined using the fluorescein diacetate/ethidium bromide assay. DNA
damage in the in vitro CA was evaluated according to tail
size in four classes (0-3) and methyl methane-sulfonate (MMS) was used as a
positive control. The cytotoxicity of 3-10 to WHBC in the CBMN was measured
using the cytokinesis-block proliferation index and the replication index.
The number of the micronucleate cells in 2,000 binucleate cells by
experimental group was determined. Mitomycin C and
N-deacetyl-N-methylcolchicine were used as positive controls. FINDINGS Compound 3 showed a significant DNA strand break effect through the
in vitro CA and highly significant clastogenic and/or
aneugenic effect in the CBMN. Compounds 5, 6, 8, 9 and 10 showed negative
results in the CBMN and positive results in the in vitro
CA, while the inverse effect was observed for 4 and 7. MAIN CONCLUSIONS Compound 10 was the most promising to proceed with the development as a drug
candidate in the treatment of Chagas disease showing absence of chromosomal
cytogenetic damage and high activity against T. cruzi,
about two times higher than 3 and the clinical drug 1.
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Affiliation(s)
- Ana Claudia Manoel Von Trompowsky
- Fundação Oswaldo Cruz-Fiocruz, Instituto Nacional de Controle de Qualidade em Saúde, Departamento de Farmacologia e Toxicologia, Rio de Janeiro, RJ, Brasil.,Fundação Oswaldo Cruz-Fiocruz, Instituto Nacional de Controle de Qualidade em Saúde, Programa de Pós-Graduação em Vigilância Sanitária, Rio de Janeiro, RJ, Brasil
| | - Taline Ramos Conde
- Fundação Oswaldo Cruz-Fiocruz, Instituto Nacional de Controle de Qualidade em Saúde, Departamento de Farmacologia e Toxicologia, Rio de Janeiro, RJ, Brasil
| | - Renata Calil Lemos
- Fundação Oswaldo Cruz-Fiocruz, Instituto Nacional de Controle de Qualidade em Saúde, Departamento de Farmacologia e Toxicologia, Rio de Janeiro, RJ, Brasil
| | - Bruna Maria Cs Quaresma
- Universidade Federal do Rio de Janeiro, Instituto de Ciências Biomédicas, Programa de Pós-Graduação em Farmacologia e Química Medicinal, Rio de Janeiro, RJ, Brasil
| | - Marcelly Cristina Sr Pitombeira
- Universidade Federal do Rio de Janeiro, Instituto de Ciências Biomédicas, Programa de Pós-Graduação em Farmacologia e Química Medicinal, Rio de Janeiro, RJ, Brasil.,Fundação Oswaldo Cruz-Fiocruz, Instituto de Tecnologia em Fármacos, Departamento de Síntese de Fármacos, Farmanguinhos, Rio de Janeiro, RJ, Brasil
| | - Alcione Silva de Carvalho
- Fundação Oswaldo Cruz-Fiocruz, Instituto de Tecnologia em Fármacos, Departamento de Síntese de Fármacos, Farmanguinhos, Rio de Janeiro, RJ, Brasil
| | - Núbia Boechat
- Fundação Oswaldo Cruz-Fiocruz, Instituto de Tecnologia em Fármacos, Departamento de Síntese de Fármacos, Farmanguinhos, Rio de Janeiro, RJ, Brasil
| | - Kelly Salomão
- Fundação Oswaldo Cruz-Fiocruz, Instituto Oswaldo Cruz, Laboratório de Biologia Celular, Rio de Janeiro, RJ, Brasil
| | - Solange Lisboa de Castro
- Fundação Oswaldo Cruz-Fiocruz, Instituto Oswaldo Cruz, Laboratório de Biologia Celular, Rio de Janeiro, RJ, Brasil
| | - Helena Pereira da Silva Zamith
- Fundação Oswaldo Cruz-Fiocruz, Instituto Nacional de Controle de Qualidade em Saúde, Departamento de Farmacologia e Toxicologia, Rio de Janeiro, RJ, Brasil.,Fundação Oswaldo Cruz-Fiocruz, Instituto Nacional de Controle de Qualidade em Saúde, Programa de Pós-Graduação em Vigilância Sanitária, Rio de Janeiro, RJ, Brasil
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Roberti A, Bensi M, Mazzagatti A, Piras FM, Nergadze SG, Giulotto E, Raimondi E. Satellite DNA at the Centromere is Dispensable for Segregation Fidelity. Genes (Basel) 2019; 10:genes10060469. [PMID: 31226862 PMCID: PMC6627300 DOI: 10.3390/genes10060469] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Accepted: 06/19/2019] [Indexed: 12/14/2022] Open
Abstract
The typical vertebrate centromeres contain long stretches of highly repeated DNA sequences (satellite DNA). We previously demonstrated that the karyotypes of the species belonging to the genus Equus are characterized by the presence of satellite-free and satellite-based centromeres and represent a unique biological model for the study of centromere organization and behavior. Using horse primary fibroblasts cultured in vitro, we compared the segregation fidelity of chromosome 11, whose centromere is satellite-free, with that of chromosome 13, which has similar size and a centromere containing long stretches of satellite DNA. The mitotic stability of the two chromosomes was compared under normal conditions and under mitotic stress induced by the spindle inhibitor, nocodazole. Two independent molecular-cytogenetic approaches were used—the interphase aneuploidy analysis and the cytokinesis-block micronucleus assay. Both assays were coupled to fluorescence in situ hybridization with chromosome specific probes in order to identify chromosome 11 and chromosome 13, respectively. In addition, we tested if the lack of centromeric satellite DNA affected chromatid cohesion under normal and stress conditions. We demonstrated that, in our system, the segregation fidelity of a chromosome is not influenced by the presence of long stretches of tandem repeats at its centromere. To our knowledge, the present study is the first analysis of the mitotic behavior of a natural satellite-free centromere.
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Affiliation(s)
- Annalisa Roberti
- Department of Biology and Biotechnology "L. Spallanzani", University of Pavia, Via Ferrata 1, 27100 Pavia, Italy.
| | - Mirella Bensi
- Department of Biology and Biotechnology "L. Spallanzani", University of Pavia, Via Ferrata 1, 27100 Pavia, Italy.
| | - Alice Mazzagatti
- Department of Biology and Biotechnology "L. Spallanzani", University of Pavia, Via Ferrata 1, 27100 Pavia, Italy.
| | - Francesca M Piras
- Department of Biology and Biotechnology "L. Spallanzani", University of Pavia, Via Ferrata 1, 27100 Pavia, Italy.
| | - Solomon G Nergadze
- Department of Biology and Biotechnology "L. Spallanzani", University of Pavia, Via Ferrata 1, 27100 Pavia, Italy.
| | - Elena Giulotto
- Department of Biology and Biotechnology "L. Spallanzani", University of Pavia, Via Ferrata 1, 27100 Pavia, Italy.
| | - Elena Raimondi
- Department of Biology and Biotechnology "L. Spallanzani", University of Pavia, Via Ferrata 1, 27100 Pavia, Italy.
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Thorne D, Leverette R, Breheny D, Lloyd M, McEnaney S, Whitwell J, Clements J, Bombick B, Gaça M. Genotoxicity evaluation of tobacco and nicotine delivery products: Part Two. In vitro micronucleus assay. Food Chem Toxicol 2019; 132:110546. [PMID: 31163219 DOI: 10.1016/j.fct.2019.05.054] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 05/06/2019] [Accepted: 05/29/2019] [Indexed: 11/26/2022]
Abstract
In this study, a variety of test matrices from tobacco and nicotine delivery products were assessed against a 3R4F Kentucky reference cigarette using the in vitro micronucleus assay. Testing was conducted using two Chinese hamster cell lines (CHO and V79), and a human lymphoblastoid cell line (TK6), in accordance with established guidelines. Total particulate matter (TPM) from a 3R4F Reference cigarette was compared to an electronic cigarette e-liquid, electronic cigarette TPM and TPM from a commercial tobacco heating product using a standard and an extended treatment condition with recovery period. Cells were assessed with 3R4F TPM prior to assessment of the other tobacco and nicotine product test matrices. These cell lines gave varied responses to 3R4F TPM with the most robust response using V79 cells. The use of an extended exposure/recovery period was seen to increase assay sensitivity for CHO and V79 cell lines but was less clear for TK6 cells. Negative responses were observed for all products except 3R4F across all treatment conditions in V79 cells. The most potent response to cigarette smoke was following extended treatment with recovery, suggesting this may be a more appropriate treatment for the future assessment of tobacco and nicotine product test matrices.
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Affiliation(s)
- David Thorne
- British American Tobacco, R&D, Southampton, Hampshire, SO15 8TL, UK.
| | - Robert Leverette
- RAI Services Company, 401 N. Main Street, Winston-Salem, NC, 27101, USA
| | - Damien Breheny
- British American Tobacco, R&D, Southampton, Hampshire, SO15 8TL, UK
| | - Mel Lloyd
- Covance Laboratories Ltd., Otley Road, Harrogate, North Yorkshire, HG3 1PY, UK
| | - Stephen McEnaney
- Covance Laboratories Ltd., Otley Road, Harrogate, North Yorkshire, HG3 1PY, UK
| | - James Whitwell
- Covance Laboratories Ltd., Otley Road, Harrogate, North Yorkshire, HG3 1PY, UK
| | - Julie Clements
- Covance Laboratories Ltd., Otley Road, Harrogate, North Yorkshire, HG3 1PY, UK
| | - Betsy Bombick
- RAI Services Company, 401 N. Main Street, Winston-Salem, NC, 27101, USA
| | - Marianna Gaça
- British American Tobacco, R&D, Southampton, Hampshire, SO15 8TL, UK
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Pinheiro JPS, Assis CBD, Muñoz-Peñuela M, Barbosa Júnior F, Correia TG, Moreira RG. Water temperature and acid pH influence the cytotoxic and genotoxic effects of aluminum in the freshwater teleost Astyanax altiparanae (Teleostei: Characidae). CHEMOSPHERE 2019; 220:266-274. [PMID: 30590293 DOI: 10.1016/j.chemosphere.2018.12.143] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Revised: 12/05/2018] [Accepted: 12/19/2018] [Indexed: 06/09/2023]
Abstract
The toxicity of metals, including aluminum (Al), can be potentiated by temperature and acid pH, a concern in view of the current global warming scenario. The aim of this study was to evaluate the bioconcentration of Al in the testes and semen of Astyanax altiparanae and the potential of this metal, at different environmental temperatures and acid pH, to cause cytotoxicity and genotocixity in erythrocytes and spermatozoa. A. altiparanae males were divided into nine experimental groups: at each of three different water temperatures (20, 25 and 30 °C), the fish were exposed to a neutral pH, an acid pH and acidic water containing Al (0.5 mg.L-1). The fish were subjected to subacute, semi-static exposure and sampled at 24 and 96 h. After each exposure period the comet assay (blood and semen) and micronucleus test (blood) were performed. Bioconcentration of Al was evaluated in the testes and semen. Exposure time and temperature influenced the Al bioconcentration pattern in the testes. Al concentration in the semen was higher in fish exposed at 20 and 25 °C (24 h). The DNA fragmentation score for the semen and blood was higher in fish exposed to Al at 20 (24 h) and 30 °C (96 h). The frequency of nuclear abnormalities in erythrocytes was higher in the group exposed to Al at 30 °C (96 h). It was concluded that Al bioconcentrates in the testes and semen of A. altiparanae at different temperatures and is potentially cytotoxic and genotoxic to erythrocytes and spermatozoa in this species.
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Affiliation(s)
- João Paulo Silva Pinheiro
- Universidade de São Paulo, Institute of Biosciences, Department of Physiology, Laboratory of Metabolism and Reproduction of Aquatic Organisms - LAMEROA; Matão Street, 14 lane, number 101 - room 220, Cidade Universitária, São Paulo, SP, Brazil.
| | - Cecília Bertacini de Assis
- Universidade de São Paulo, Institute of Biosciences, Department of Physiology, Laboratory of Metabolism and Reproduction of Aquatic Organisms - LAMEROA; Matão Street, 14 lane, number 101 - room 220, Cidade Universitária, São Paulo, SP, Brazil.
| | - Marcela Muñoz-Peñuela
- Universidade de São Paulo, Institute of Biosciences, Department of Physiology, Laboratory of Metabolism and Reproduction of Aquatic Organisms - LAMEROA; Matão Street, 14 lane, number 101 - room 220, Cidade Universitária, São Paulo, SP, Brazil.
| | - Fernando Barbosa Júnior
- Universidade de São Paulo, Faculty of Pharmaceutical Sciences of Ribeirão Preto (FCFRP), Café Avenue, Ribeirão Preto, SP, Brazil.
| | - Tiago Gabriel Correia
- Universidade Federal do Amapá, Biological Sciences Course, Juscelino Kubitschek Highway, Km 02 - Jardim Marco Zero, Macapá, AP, Brazil.
| | - Renata Guimarães Moreira
- Universidade de São Paulo, Institute of Biosciences, Department of Physiology, Laboratory of Metabolism and Reproduction of Aquatic Organisms - LAMEROA; Matão Street, 14 lane, number 101 - room 220, Cidade Universitária, São Paulo, SP, Brazil.
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Machado A, Aissa A, Ribeiro D, Costa T, Ferreira Jr. R, Sampaio S, Antunes L. Cytotoxic, genotoxic, and oxidative stress-inducing effect of an l-amino acid oxidase isolated from Bothrops jararacussu venom in a co-culture model of HepG2 and HUVEC cells. Int J Biol Macromol 2019; 127:425-432. [DOI: 10.1016/j.ijbiomac.2019.01.059] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Revised: 12/18/2018] [Accepted: 01/12/2019] [Indexed: 12/21/2022]
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Lynch AM, Eastmond D, Elhajouji A, Froetschl R, Kirsch-Volders M, Marchetti F, Masumura K, Pacchierotti F, Schuler M, Tweats D. Targets and mechanisms of chemically induced aneuploidy. Part 1 of the report of the 2017 IWGT workgroup on assessing the risk of aneugens for carcinogenesis and hereditary diseases. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2019; 847:403025. [PMID: 31699346 DOI: 10.1016/j.mrgentox.2019.02.006] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 01/22/2019] [Accepted: 02/20/2019] [Indexed: 02/06/2023]
Abstract
An aneuploidy workgroup was established as part of the 7th International Workshops on Genotoxicity Testing. The workgroup conducted a review of the scientific literature on the biological mechanisms of aneuploidy in mammalian cells and methods used to detect chemical aneugens. In addition, the current regulatory framework was discussed, with the objective to arrive at consensus statements on the ramifications of exposure to chemical aneugens for human health risk assessment. As part of these efforts, the workgroup explored the use of adverse outcome pathways (AOPs) to document mechanisms of chemically induced aneuploidy in mammalian somatic cells. The group worked on two molecular initiating events (MIEs), tubulin binding and binding to the catalytic domain of aurora kinase B, which result in several adverse outcomes, including aneuploidy. The workgroup agreed that the AOP framework provides a useful approach to link evidence for MIEs with aneuploidy on a cellular level. The evidence linking chemically induced aneuploidy with carcinogenicity and hereditary disease was also reviewed and is presented in two companion papers. In addition, the group came to the consensus that the current regulatory test batteries, while not ideal, are sufficient for the identification of aneugens and human risk assessment. While it is obvious that there are many different MIEs that could lead to the induction of aneuploidy, the most commonly observed mechanisms involving chemical aneugens are related to tubulin binding and, to a lesser extent, inhibition of mitotic kinases. The comprehensive review presented here should help with the identification and risk management of aneugenic agents.
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Affiliation(s)
| | | | - Azeddine Elhajouji
- Novartis Institutes for Biomedical Research, Preclinical Safety, Basel, Switzerland
| | | | | | - Francesco Marchetti
- Environmental Health Science and Research Bureau, Health Canada, Ottawa, ON, Canada
| | - Kenichi Masumura
- Division of Genetics and Mutagenesis, National Institute of Health Sciences, Kanagawa, Japan
| | - Francesca Pacchierotti
- Health Protection Technology Division, Laboratory of Biosafety and Risk Assessment, ENEA, CR Casaccia, Rome, Italy
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Finlayson KA, Leusch FDL, van de Merwe JP. Primary green turtle (Chelonia mydas) skin fibroblasts as an in vitro model for assessing genotoxicity and oxidative stress. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2019; 207:13-18. [PMID: 30502692 DOI: 10.1016/j.aquatox.2018.11.022] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 11/26/2018] [Accepted: 11/26/2018] [Indexed: 06/09/2023]
Abstract
Little is known about the effects of contaminants that accumulate in sea turtles. When in vivo exposure studies have ethical and logistical barriers, as is the case with sea turtles, in vitro tools can provide important information on the effects of contaminants. Several in vitro studies have assessed cytotoxicity of contaminants to sea turtles cells, however to gain a more refined mechanistic understanding of the effects of contaminants, sub-lethal effects also require investigation. Considering the complex mixture of contaminants that sea turtles are potentially exposed to, high throughput testing methods are necessary so that a large number of contaminants (and mixtures) can be rapidly tested. This study examined oxidative stress (reactive oxygen species production) and genotoxicity (micronucleus formation) in primary green turtle skin fibroblasts in response to 16 organic and inorganic contaminants found in coastal environments. Significant induction of oxidative stress was found with Cu, Co, Cr, and Hg. Significant effects on genotoxicity were found with Cu, Co, Cr, Hg, Pb and metolachlor. Effect concentrations from the bioassays were used in a simple risk assessment of turtles worldwide using accumulation values from the literature to identify populations at risk. Cu, Co, Cr and Hg were identified as posing the biggest threat to sea turtles. This study demonstrated the validity of using primary turtle cell cultures in the assessment of risk associated with a large number of contaminants using a high-throughput toxicity testing format.
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Affiliation(s)
- Kimberly A Finlayson
- Australian Rivers Institute, School of Environment and Science, Griffith University, Gold Coast, Australia.
| | - Frederic D L Leusch
- Australian Rivers Institute, School of Environment and Science, Griffith University, Gold Coast, Australia
| | - Jason P van de Merwe
- Australian Rivers Institute, School of Environment and Science, Griffith University, Gold Coast, Australia
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Dailton Guedes de Oliveira Moraes C, Henrique Godoi B, Chaves Silva Carvalho I, Cristina Pinto J, Carvalho Rossato R, Soares da Silva N, Pacheco Soares C. Genotoxic effects of photodynamic therapy in laryngeal cancer cells - An in vitro study. Exp Biol Med (Maywood) 2019; 244:262-271. [PMID: 30674213 DOI: 10.1177/1535370219826544] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
IMPACT STATEMENT Recently, the use of photodynamic therapy grows as an alternative treatment for cancer, since it has a noninvasive characteristic and affinity to the tumor tissue. Accordingly, understanding the therapy's foci of action is important for the technique improvement. This work aims to understand the genotoxic effect triggered by the therapy action, thus evidencing the permanent changes caused to the genetic material of the tumor cell after the treatment. Therefore, to increase the knowledge in this study field, the methodology of the comet assay and count of micronucleus formed after the therapy was adopted in order to understand if the damage caused to the DNA of tumor cell makes its replication process unfeasible in future generations. The study allows a better therapeutic approach to the cancer treatment, making the process of association between therapies a more effective option during the disease treatment.
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Affiliation(s)
- Carlos Dailton Guedes de Oliveira Moraes
- 1 Institute of Research and Development - IP&D, Universidade do Vale do Paraíba - UNIVAP, Laboratory Dynamics of Cellular Compartments, Sao Paulo 12244-000, Brazil
| | - Bruno Henrique Godoi
- 1 Institute of Research and Development - IP&D, Universidade do Vale do Paraíba - UNIVAP, Laboratory Dynamics of Cellular Compartments, Sao Paulo 12244-000, Brazil
| | - Isabel Chaves Silva Carvalho
- 1 Institute of Research and Development - IP&D, Universidade do Vale do Paraíba - UNIVAP, Laboratory Dynamics of Cellular Compartments, Sao Paulo 12244-000, Brazil
| | - Jessica Cristina Pinto
- 1 Institute of Research and Development - IP&D, Universidade do Vale do Paraíba - UNIVAP, Laboratory Dynamics of Cellular Compartments, Sao Paulo 12244-000, Brazil
| | - Rafaella Carvalho Rossato
- 1 Institute of Research and Development - IP&D, Universidade do Vale do Paraíba - UNIVAP, Laboratory Dynamics of Cellular Compartments, Sao Paulo 12244-000, Brazil
| | - Newton Soares da Silva
- 2 Institute of Research and Development - IP&D, Universidade do Vale do Paraíba - UNIVAP, Laboratory of Cell Biology and Tissue, Sao Paulo, CEP 12244-000, Brazil
| | - Cristina Pacheco Soares
- 1 Institute of Research and Development - IP&D, Universidade do Vale do Paraíba - UNIVAP, Laboratory Dynamics of Cellular Compartments, Sao Paulo 12244-000, Brazil
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Anchordoquy JM, Anchordoquy JP, Nikoloff N, Gambaro R, Padula G, Seoane A, Furnus C. Doramectin induced cytotoxic and genotoxic effects on bovine peripheral lymphocytes and cumulus cells in vitro. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2019; 54:147-154. [PMID: 30668218 DOI: 10.1080/03601234.2018.1559569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The effect of doramectin (DOR) was tested on two experimental somatic bovine cells in vitro: peripheral lymphocytes (PL) and cumulus cells (CC). The cytotoxicity and genotoxicity of DOR were assessed using 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2H-tetrazolium bromide (MTT) assay, single cell gel electrophoresis assay (SCGE) and cytokinesis-block micronucleus cytome (CBMN Cyt) assay. Both cells were treated with three concentrations of DOR (20, 40, 60 ng mL-1) for 24 h. The results obtained from PL demonstrated that DOR was able to induce cytotoxic effect and DNA damage with all concentrations tested. Additionally, DOR increased micronuclei (MNi) frequency and nuclear buds (NBuds) with 20, 40, 60 ng mL-1, and nucleoplasmic bridges (NPBs) only with 40 ng mL-1. On the other hand, the three concentrations of DOR were not able to induce cytotoxic effect and DNA damage using SCGE in the bovine CC. Nevertheless, the two higher concentrations of DOR (20, 40 µg mL-1) significantly increased the frequency of micronucleus formation in bovine CC. These results represent the first experimental evidence of genotoxic and cytotoxic effects exerted by DOR on bovine PL and CC.
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Affiliation(s)
- Juan Mateo Anchordoquy
- a Instituto de Genética Veterinaria "Ing. Fernando N Dulout" (UNLP-CONICET-CONICET LA PLATA), Facultad de Ciencias Veterinarias - UNLP , IGEVET , La Plata , Buenos Aires , Argentina
| | - Juan Patricio Anchordoquy
- a Instituto de Genética Veterinaria "Ing. Fernando N Dulout" (UNLP-CONICET-CONICET LA PLATA), Facultad de Ciencias Veterinarias - UNLP , IGEVET , La Plata , Buenos Aires , Argentina
| | - Noelia Nikoloff
- a Instituto de Genética Veterinaria "Ing. Fernando N Dulout" (UNLP-CONICET-CONICET LA PLATA), Facultad de Ciencias Veterinarias - UNLP , IGEVET , La Plata , Buenos Aires , Argentina
| | - Rocío Gambaro
- a Instituto de Genética Veterinaria "Ing. Fernando N Dulout" (UNLP-CONICET-CONICET LA PLATA), Facultad de Ciencias Veterinarias - UNLP , IGEVET , La Plata , Buenos Aires , Argentina
| | - Gisel Padula
- a Instituto de Genética Veterinaria "Ing. Fernando N Dulout" (UNLP-CONICET-CONICET LA PLATA), Facultad de Ciencias Veterinarias - UNLP , IGEVET , La Plata , Buenos Aires , Argentina
- b Facultad de Ciencias Naturales y Museo - UNLP , Plata , Buenos Aires , La Argentina
| | - Analía Seoane
- a Instituto de Genética Veterinaria "Ing. Fernando N Dulout" (UNLP-CONICET-CONICET LA PLATA), Facultad de Ciencias Veterinarias - UNLP , IGEVET , La Plata , Buenos Aires , Argentina
| | - Cecilia Furnus
- a Instituto de Genética Veterinaria "Ing. Fernando N Dulout" (UNLP-CONICET-CONICET LA PLATA), Facultad de Ciencias Veterinarias - UNLP , IGEVET , La Plata , Buenos Aires , Argentina
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Gerić M, Gajski G, Domijan AM, Garaj-Vrhovac V, Filipič M, Žegura B. Genotoxic effects of neurotoxin ß-N-methylamino-l-alanine in human peripheral blood cells. CHEMOSPHERE 2019; 214:623-632. [PMID: 30290362 DOI: 10.1016/j.chemosphere.2018.09.155] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Revised: 09/21/2018] [Accepted: 09/26/2018] [Indexed: 06/08/2023]
Abstract
The non-proteinogenic amino acid ß-N-methylamino-l-alanine (BMAA) is associated with the development of neurodegenerative diseases such as Alzheimer's disease, amyotrophic lateral sclerosis/parkinsonism-dementia complex (ALS-PDC) and amyotrophic lateral sclerosis. BMAA is known to induce neurotoxic effects leading to neurodegeneration via multiple mechanisms including misfolded protein accumulation, glutamate induced excitotoxicity, calcium dyshomeostasis, endoplasmic reticulum stress and oxidative stress. In the present study, for the first time, genotoxic activity of BMAA (2.5, 5, 10 and 20 μg/mL) was studied in human peripheral blood cells (HPBCs) using the comet and cytokinesis-block micronucleus cytome assays. In addition, the influence of BMAA on the oxidative stress was assessed. At non-cytotoxic concentrations BMAA did not induce formation of DNA strand breaks in HPBCs after 4 and 24 h exposure; however, it significantly increased the number of micronuclei after 24 and 48 h at 20 μg/mL and nucleoplasmic bridges after 48 h at 20 μg/mL. The frequency of nuclear buds was slightly though non-significantly increased after 48 h. Altogether, this indicates that in HPBCs BMAA is clastogenic and induces complex genomic alterations including structural chromosomal rearrangements and gene amplification. No influence on oxidative stress markers was noticed. These findings provide new evidence that environmental neurotoxin BMAA, in addition to targeting common pathways involved in neurodegeneration, can also induce genomic instability in non-target HPBCs suggesting that it might be involved in cancer development. Therefore, these data are important in advancing our current knowledge and opening new questions in the understanding of the mechanisms of BMAA toxicity, particularly in the context of genotoxicity.
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Affiliation(s)
- Marko Gerić
- Mutagenesis Unit, Institute for Medical Research and Occupational Health, 10000 Zagreb, Croatia.
| | - Goran Gajski
- Mutagenesis Unit, Institute for Medical Research and Occupational Health, 10000 Zagreb, Croatia.
| | - Ana-Marija Domijan
- Department of Pharmaceutical Botany, Faculty of Pharmacy and Biochemistry, University of Zagreb, 10000 Zagreb, Croatia.
| | - Vera Garaj-Vrhovac
- Mutagenesis Unit, Institute for Medical Research and Occupational Health, 10000 Zagreb, Croatia.
| | - Metka Filipič
- Department for Genetic Toxicology and Cancer Biology, National Institute of Biology, 1000 Ljubljana, Slovenia.
| | - Bojana Žegura
- Department for Genetic Toxicology and Cancer Biology, National Institute of Biology, 1000 Ljubljana, Slovenia.
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Kirsch-Volders M, Pacchierotti F, Parry EM, Russo A, Eichenlaub-Ritter U, Adler ID. Risks of aneuploidy induction from chemical exposure: Twenty years of collaborative research in Europe from basic science to regulatory implications. MUTATION RESEARCH-REVIEWS IN MUTATION RESEARCH 2018; 779:126-147. [PMID: 31097149 DOI: 10.1016/j.mrrev.2018.11.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 11/26/2018] [Indexed: 12/13/2022]
Abstract
Although Theodor Boveri linked abnormal chromosome numbers and disease more than a century ago, an in-depth understanding of the impact of mitotic and meiotic chromosome segregation errors on cell proliferation and diseases is still lacking. This review reflects on the efforts and results of a large European research network that, from the 1980's until 2004, focused on protection against aneuploidy-inducing factors and tackled the following problems: 1) the origin and consequences of chromosome imbalance in somatic and germ cells; 2) aneuploidy as a result of environmental factors; 3) dose-effect relationships; 4) the need for validated assays to identify aneugenic factors and classify them according to their modes of action; 5) the need for reliable, quantitative data suitable for regulating exposure and preventing aneuploidy induction; 6) the need for mechanistic insight into the consequences of aneuploidy for human health. This activity brought together a consortium of experts from basic science and applied genetic toxicology to prepare the basis for defining guidelines and to encourage regulatory activities for the prevention of induced aneuploidy. Major strengths of the EU research programmes on aneuploidy were having a valuable scientific approach based on well-selected compounds and accurate methods that allow the determination of precise dose-effect relationships, reproducibility and inter-laboratory comparisons. The work was conducted by experienced scientists stimulated by a fascination with the complex scientific issues surrounding aneuploidy; a key strength was asking the right questions at the right time. The strength of the data permitted evaluation at the regulatory level. Finally, the entire enterprise benefited from a solid partnership under the lead of an inspired and stimulating coordinator. The research programme elucidated the major modes of action of aneugens, developed scientifically sound assays to assess aneugens in different tissues, and achieved the international validation of relevant assays with the goal of protecting human populations from aneugenic chemicals. The role of aneuploidy in tumorigenesis will require additional research, and the study of effects of exposure to multiple agents should become a priority. It is hoped that these reflections will stimulate the implementation of aneuploidy testing in national and OECD guidelines.
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Affiliation(s)
- Micheline Kirsch-Volders
- Laboratory for Cell Genetics, Faculty of Sciences and Bioengineering, Vrije Universiteit Brussel, Brussels, Belgium.
| | | | | | - Antonella Russo
- Department of Molecular Medicine, University of Padova, Padova, Italy
| | - Ursula Eichenlaub-Ritter
- Institute of Gene Technology/Microbiology, Faculty of Biology, University of Bielefeld, Bielefeld, Germany
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Molecular cytogenetics of the micronucleus: Still surprising. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2018; 836:36-40. [DOI: 10.1016/j.mrgentox.2018.05.011] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Revised: 04/09/2018] [Accepted: 05/07/2018] [Indexed: 01/12/2023]
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68
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Jeong MH, Seong NW, Lee JY, Kim YJ, Shin NR, Kim JC. In vitro and in vivo evaluation of the genotoxicity of Eriobotrya japonica leaf extract. Regul Toxicol Pharmacol 2018; 99:238-243. [DOI: 10.1016/j.yrtph.2018.09.029] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Revised: 09/25/2018] [Accepted: 09/26/2018] [Indexed: 01/02/2023]
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Singulani JL, Pedroso RS, Ribeiro AB, Nicolella HD, Freitas KS, Damasceno JL, Vieira TM, Crotti AEM, Tavares DC, Martins CHG, Mendes-Giannini MJS, Pires RH. Geraniol and linalool anticandidal activity, genotoxic potential and embryotoxic effect on zebrafish. Future Microbiol 2018; 13:1637-1646. [DOI: 10.2217/fmb-2018-0200] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Aim: Geraniol and linalool are major constituents of the essential oils of medicinal plants. Materials & methods: Antifungal activity of geraniol and linalool were evaluated against five Candida species. The genotoxicity of these compounds was evaluated by the cytokinesis-block micronucleus test, and the embryotoxic assays use zebrafish model. Results: Geraniol and linalool inhibited Candida growth, but geraniol was more effective. The geraniol at concentration of 800 μg/ml and the linalool at concentration of 125 μg/ml significantly increased chromosome damage. Geraniol was more toxic to zebrafish embryo than linalool: LC50 values were 31.3 and 193.3 μg/ml, respectively. Conclusion: Geraniol and linalool have anticandidal activity, but they also exert genotoxic and embryotoxic effects at the highest tested concentrations.
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Affiliation(s)
- Junya L Singulani
- Universidade Estadual Paulista Julio de Mesquita Filho, 14800-903, Araraquara, SP, Brazil
| | - Reginaldo S Pedroso
- Universidade de Franca, 14404-600, Franca, SP, Brazil
- Universidade Federal de Uberlândia,38400-902, Uberlândia, MG, Brazil
| | | | | | | | | | - Tatiana M Vieira
- Universidade de São Paulo, 14040-901, Ribeirão Preto, SP, Brazil
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Gerić M, Popić J, Gajski G, Garaj-Vrhovac V. Cytogenetic status of interventional radiology unit workers occupationally exposed to low-dose ionising radiation: A pilot study. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2018; 843:46-51. [PMID: 31421738 DOI: 10.1016/j.mrgentox.2018.10.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Revised: 10/09/2018] [Accepted: 10/10/2018] [Indexed: 12/15/2022]
Abstract
Interventional radiology unit workers represent one of the occupationally most exposed populations to low-dose ionizing radiation. Since there are many uncertainties in research of doses below 100 mSv, this study attempted to evaluate DNA damage levels in chronically exposed personnel. The study group consisted of 24 subjects matched with a control population by the number of participants, age, gender ratio, active smoking status, the period of blood sampling, and residence. Based on regular dosimetry using thermoluminiscent dosimeters, our study group occupationally received a dose of 1.82 ± 3.60 mSv over the last year. The results of the cytokinesis-block micronucleus assay and the comet assay showed a higher nuclear buds frequency (4.09 ± 1.88) and tail length (15.46 ± 1.47 μm) than in the control group (2.96 ± 1.67, 14.05 ± 1.36 μm, respectively). Differences in other descriptors from both tests did not reach statistical significance. Further investigations are needed to develop algorithms for improving personal dosimetry and those that would engage larger biomonitoring study groups.
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Affiliation(s)
- Marko Gerić
- Institute for Medical Research and Occupational Health, Mutagenesis Unit, Zagreb, Croatia
| | - Jelena Popić
- University of Zagreb, School of Medicine, Clinical Hospital Merkur, Zagreb, Croatia
| | - Goran Gajski
- Institute for Medical Research and Occupational Health, Mutagenesis Unit, Zagreb, Croatia
| | - Vera Garaj-Vrhovac
- Institute for Medical Research and Occupational Health, Mutagenesis Unit, Zagreb, Croatia.
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In vivo combined treatment of rats with ivermectin and aged garlic extract attenuates ivermectin-induced cytogenotoxicity in bone marrow cells. Res Vet Sci 2018; 120:94-100. [DOI: 10.1016/j.rvsc.2018.09.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Revised: 08/31/2018] [Accepted: 09/26/2018] [Indexed: 11/20/2022]
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Gazoni VF, Balogun SO, Arunachalam K, Oliveira DM, Filho VC, Lima SR, Colodel EM, Soares IM, Ascêncio SD, Martins DTDO. Assessment of toxicity and differential antimicrobial activity of methanol extract of rhizome of Simaba ferruginea A. St.-Hil. and its isolate canthin-6-one. JOURNAL OF ETHNOPHARMACOLOGY 2018; 223:122-134. [PMID: 29772356 DOI: 10.1016/j.jep.2018.05.014] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Revised: 04/20/2018] [Accepted: 05/11/2018] [Indexed: 06/08/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Simaba ferruginea A. St.-Hil., Simaroubaceae, popularly known as "calunga" is a typical subtropical shrub used in Central Brazil mainly for infection, anti-inflammatory, analgesic and gastric duodenal-ulcers. It presents in its composition the alkaloid canthin-6-one, an alkaloid indole β-carboxylic. AIM This study aims to investigate the toxicity, antimicrobial activities of methanol extract of Simaba ferruginea (MESf) and canthin-6-one by using different experimental models. METHODS The present study evaluated the phytochemical analysis by high performance liquid chromatography (HPLC), toxicological potential of MESf and canthin-6-one, using the cytotoxicity, genotoxicity assays with CHO-K1 cells and in vivo acute test in mice. Antimicrobial activity was evaluated by the broth microdilution assays, while the antimicrobial mechanism of action was also assessed using different in vitro bacterial and fungal models. RESULTS The HPLC analysis of MESf revealed the presence of canthin-6-one, kaempferol and morin. Differential in vitro toxicities were observed between MESf and canthin-6-one. In the cytotoxicity assay, MESf presented toxicity against CHO-K1, while canthin-6-one did not. In the case of in vitro genotoxicity, both showed to be potentially genotoxic. In the in vivo toxicity study, both MESf (up to 1000 mg/kg) and cantin-6-one (up to 100 mg/kg) caused no toxicologically relevant alterations and are thus considered not to be toxic. MESf was shown to be relatively safe with NOAEL (100 mg/kg) when administrate in mice. Both MESf and canthin-6-one also showed differential antimicrobial activities. On one hand, MESf demonstrated good spectrum of antibacterial action against Staphylococcus aureus (MIC 12.5 μg/mL) and Escherichia coli (MIC 25 μg/mL) and moderate activity against Enterococcus faecalis and Shigella flexneri (MIC 200 μg/mL) but no antifungal effect. On the hand, canthin-6-one showed no antibacterial activity, except against Staphylococcus aureus (100 μg/mL), but potent in vitro fungicidal activity against clinically important Aspergillus niger and Candida species at MFC intervals ranging from 3.12 to 25 μg/mL. Both MESf and canthin-6-one were bacteriostatic in action. MESf antimicrobial mechanism of actions are associated with changes in the permeability of bacterial membranes, evidenced by the increased entry of hydrophobic antibiotic in Shigella flexneri, intense K+ efflux (Shigella flexneri, Staphylococcus aureus) and nucleotides leakage (Staphylococcus aureus). In the antifungal mode of action, canthin-6-one inhibited Saccharomyces cerevisiae growth and including alteration in the cell membrane of Neurospora crassa. CONCLUSION The results of this work demonstrated the differential antimicrobial activities of MESf and its alkaloid isolate, canthin-6-one with antibacterial and antifungal activities, respectively. The present study support the popular use of Simaba ferruginea in combatting afflictions related to bacterial infections, and demonstrate that canthin-6-one as a promising antifungal agent. Both MESf and canthin-6-one are considered non-toxic based on the in vitro toxicological study.
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Affiliation(s)
- Vanessa Fátima Gazoni
- Área de Farmacologia, Departamento de Ciências Básicas em Saúde, Faculdade de Medicina, Universidade Federal de Mato Grosso (UFMT), 78060-900 Cuiabá, Mato Grosso, Brazil
| | - Sikiru Olaitan Balogun
- Área de Farmacologia, Departamento de Ciências Básicas em Saúde, Faculdade de Medicina, Universidade Federal de Mato Grosso (UFMT), 78060-900 Cuiabá, Mato Grosso, Brazil; Faculdade Noroeste do Mato Grosso - AJES, 78320-000 Juína, Mato Grosso, Brazil
| | - Karuppusamy Arunachalam
- Área de Farmacologia, Departamento de Ciências Básicas em Saúde, Faculdade de Medicina, Universidade Federal de Mato Grosso (UFMT), 78060-900 Cuiabá, Mato Grosso, Brazil
| | - Darley Maria Oliveira
- Área de Farmacologia, Departamento de Ciências Básicas em Saúde, Faculdade de Medicina, Universidade Federal de Mato Grosso (UFMT), 78060-900 Cuiabá, Mato Grosso, Brazil
| | - Valdir Cechinel Filho
- Núcleo de Investigações Químico-Farmacêuticas (NIQFAR), Universidade de Vale do Itajaí, 78020-400 Itajaí, SC, Brazil
| | - Samara Rosolem Lima
- Faculdade de Medicina Veterinaria, Universidade Federal de Mato Grosso (UFMT), Av. Fernando Corrêa da Costa, no. 2367, Boa Esperança, 78060-900 Cuiabá, MT, Brazil
| | - Edson Moleta Colodel
- Faculdade de Medicina Veterinaria, Universidade Federal de Mato Grosso (UFMT), Av. Fernando Corrêa da Costa, no. 2367, Boa Esperança, 78060-900 Cuiabá, MT, Brazil
| | - Ilsamar Mendes Soares
- Laboratório de Pesquisa em Produtos Naturais, Faculdade de Medicina, Universidade Federal de Tocantis, 77020-210 Palmas, Tocantins, Brazil
| | - Sérgio Donizeti Ascêncio
- Laboratório de Pesquisa em Produtos Naturais, Faculdade de Medicina, Universidade Federal de Tocantis, 77020-210 Palmas, Tocantins, Brazil
| | - Domingos Tabajara de Oliveira Martins
- Área de Farmacologia, Departamento de Ciências Básicas em Saúde, Faculdade de Medicina, Universidade Federal de Mato Grosso (UFMT), 78060-900 Cuiabá, Mato Grosso, Brazil.
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Analysis of health-related biomarkers between vegetarians and non-vegetarians: A multi-biomarker approach. J Funct Foods 2018. [DOI: 10.1016/j.jff.2018.07.054] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
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74
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Rodrigues MA. Automation of the in vitro micronucleus assay using the Imagestream ® imaging flow cytometer. Cytometry A 2018; 93:706-726. [PMID: 30118149 PMCID: PMC6174940 DOI: 10.1002/cyto.a.23493] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Revised: 04/16/2018] [Accepted: 04/25/2018] [Indexed: 12/02/2022]
Abstract
The in vitro micronucleus (MN) assay is a well‐established test for evaluating genotoxicity and cytotoxicity. The use of manual microscopy to perform the assay can be laborious and often suffers from user subjectivity and interscorer variability. Automated methods including slide‐scanning microscopy and conventional flow cytometry have been developed to eliminate scorer bias and improve throughput. However, these methods possess several limitations such as lack of cytoplasmic visualization using slide‐scanning microscopy and the inability to visually confirm the legitimacy of MN or storage of image data for re‐evaluation using flow cytometry. The ImageStreamX® MK II (ISX) imaging flow cytometer has been demonstrated to overcome all of these limitations. The ISX combines the speed, statistical robustness, and rare event capture capability of conventional flow cytometry with high resolution fluorescent imagery of microscopy and possesses the ability to store all collected image data. This paper details the methodology developed to perform the in vitro MN assay in human lymphoblastoid TK6 cells on the ISX. High resolution images of micronucleated mono‐ and bi‐nucleated cells as well as polynucleated cells can be acquired at a high rate of capture. All images can then be automatically identified, categorized and enumerated in the data analysis software that accompanies the ImageStream, allowing for the scoring of both genotoxicity and cytotoxicity. The results demonstrate that statistically significant increases in MN frequency when compared with solvent controls can be detected at varying levels of cytotoxicity following exposure to well‐known aneugens and clastogens. This work demonstrates a fully automated method for performing the in vitro micronucleus assay on the ISX imaging flow cytometry platform. © 2018 The Author. Cytometry Part A published by Wiley Periodicals, Inc. on behalf of ISAC.
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Guo J, Shi R, Cao Y, Luan Y, Zhou Y, Gao Y, Tian Y. Genotoxic effects of imidacloprid in human lymphoblastoid TK6 cells. Drug Chem Toxicol 2018; 43:208-212. [DOI: 10.1080/01480545.2018.1497048] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Jingyi Guo
- Department of Environmental Health, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Rong Shi
- Department of Environmental Health, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yiyi Cao
- Department of Environmental Health, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yang Luan
- Department of Environmental Health, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yijun Zhou
- Department of Environmental Health, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yu Gao
- Department of Environmental Health, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Ying Tian
- Department of Environmental Health, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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Ayabaktı S, Yavuz Kocaman A. Cytogenotoxic effects of venlafaxine hydrochloride on cultured human peripheral blood lymphocytes. Drug Chem Toxicol 2018; 43:192-199. [PMID: 30025480 DOI: 10.1080/01480545.2018.1486410] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The potential genotoxic effect of venlafaxine hydrochloride (venlafaxine), an antidepressant drug-active ingredient, was investigated by using in vitro chromosome aberrations (CAs) and cytokinesis-block micronucleus (CBMN) assays in human peripheral blood lymphocytes (PBLs). Mitotic index (MI) and cytokinesis-block proliferation index (CBPI) were also calculated to determine the cytotoxicity of this active drug. For this aim, the human PBLs were treated with 25, 50, and 100 µg/ml venlafaxine for 24 h and 48 h. The results of this study showed that venlafaxine significantly induced the formation of structural CA and MN for all concentrations (25, 50, and 100 µg/ml) and treatment periods (24 h and 48 h) when compared with the negative and the solvent control (except 25 µg/ml at 48 h for MN). In addition, the increases in the percentage of structural CA and MN were concentration-dependent for both treatment times. With regard to cell cycle kinetics, venlafaxine significantly decreased the MI at all concentrations, and also CBPI at the higher concentrations for both treatment times as compared to the control groups. The present results indicate for the first time that venlafaxine had significant clastogenic and cytotoxic effects at the tested concentrations (25, 50, and 100 µg/ml) in the human PBLs, in vitro; therefore, its excessive and careless use may pose a potential risk to human health.
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Affiliation(s)
- Selim Ayabaktı
- Basic and Applied Sciences Institute, Hatay Mustafa Kemal University, Hatay, Turkey
| | - Ayşe Yavuz Kocaman
- Department of Biology, Faculty of Sciences and Letters, Hatay Mustafa Kemal University, Hatay, Turkey
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77
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Bacterial Colonization and Tissue Compatibility of Denture Base Resins. Dent J (Basel) 2018; 6:dj6020020. [PMID: 29914101 PMCID: PMC6023505 DOI: 10.3390/dj6020020] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Revised: 06/08/2018] [Accepted: 06/12/2018] [Indexed: 11/18/2022] Open
Abstract
Currently, there is minimal clinical data regarding biofilm composition on the surface of denture bases and the clinical tissue compatibility. Therefore, the aim of this experimental study was to compare the bacterial colonization and the tissue compatibility of a hypoallergenic polyamide with a frequently used PMMA resin tested intraorally in a randomized split-mouth design. Test specimens made of polyamide (n = 10) and PMMA (n = 10) were attached over a molar band appliance in oral cavity of 10 subjects. A cytological smear test was done from palatal mucosa at baseline and after four weeks. The monolayers were inspected for micronuclei. After four weeks in situ, the appliance was removed. The test specimens were immediately cultivated on non-selective and selective nutrient media. All growing colonies were identified using VITEK-MS. The anonymized results were analyzed descriptively. A total of 110 different bacterial species could be isolated, including putative pathogens. An average of 17.8 different bacterial species grew on the PMMA specimens, and 17.3 on the polyamide specimens. The highest number of different bacterial species was n = 24, found on a PMMA specimen. On the two specimens, a similar bacterial distribution was observed. Micronuclei, as a marker for genotoxic potential of dental materials, were not detected. This study indicates that the composition of bacterial biofilm developed on these resins after four weeks is not influenced by the type of resin itself. The two materials showed no cytological differences. This investigation suggests that polyamide and PMMA are suitable for clinical use as denture base material.
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78
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Bekeschus S, Schmidt A, Kramer A, Metelmann HR, Adler F, von Woedtke T, Niessner F, Weltmann KD, Wende K. High throughput image cytometry micronucleus assay to investigate the presence or absence of mutagenic effects of cold physical plasma. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2018; 59:268-277. [PMID: 29417643 DOI: 10.1002/em.22172] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Revised: 11/17/2017] [Accepted: 11/21/2017] [Indexed: 06/08/2023]
Abstract
Promising cold physical plasma sources have been developed in the field of plasma medicine. An important prerequisite to their clinical use is lack of genotoxic effects in cells. During optimization of one or even different plasma sources for a specific application, large numbers of samples need to be analyzed. There are soft and easy-to-assess markers for genotoxic stress such as phosphorylation of histone H2AX (γH2AX) but only few tests are accredited by the OECD with regard to mutagenicity detection. The micronucleus (MN) assay is among them but often requires manual counting of many thousands of cells per sample under the microscope. A high-throughput MN assay is presented using image flow cytometry and image analysis software. A human lymphocyte cell line was treated with plasma generated with ten different feed gas conditions corresponding to distinct reactive species patterns that were investigated for their genotoxic potential. Several millions of cells were automatically analyzed by a MN quantification strategy outlined in detail in this work. Our data demonstrates the absence of newly formed MN in any feed gas condition using the atmospheric pressure plasma jet kINPen. As positive control, ionizing radiation gave a significant 5-fold increase in micronucleus frequency. Thus, this assay is suitable to assess the genotoxic potential in large sample sets of cells exposed chemical or physical agents including plasmas in an efficient, reliable, and semiautomated manner. Environ. Mol. Mutagen. 59:268-277, 2018. © 2018 Wiley Periodicals, Inc.
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Affiliation(s)
- Sander Bekeschus
- ZIK plasmatis, Leibniz-Institute for Plasma Science and Technology (INP Greifswald), Greifswald, Germany
| | - Anke Schmidt
- ZIK plasmatis, Leibniz-Institute for Plasma Science and Technology (INP Greifswald), Greifswald, Germany
| | - Axel Kramer
- Institute for Hygiene and Environmental Medicine, University Medicine Greifswald, Greifswald, Germany
| | - Hans-Robert Metelmann
- Department of Oral and Maxillofacial Surgery/Plastic Surgery, University Medicine Greifswald, Greifswald, Germany
| | - Frank Adler
- Department of Radiotherapy, University Medicine Greifswald, Greifswald, Germany
| | - Thomas von Woedtke
- ZIK plasmatis, Leibniz-Institute for Plasma Science and Technology (INP Greifswald), Greifswald, Germany
- Institute for Hygiene and Environmental Medicine, University Medicine Greifswald, Greifswald, Germany
| | - Felix Niessner
- ZIK plasmatis, Leibniz-Institute for Plasma Science and Technology (INP Greifswald), Greifswald, Germany
| | - Klaus-Dieter Weltmann
- ZIK plasmatis, Leibniz-Institute for Plasma Science and Technology (INP Greifswald), Greifswald, Germany
| | - Kristian Wende
- ZIK plasmatis, Leibniz-Institute for Plasma Science and Technology (INP Greifswald), Greifswald, Germany
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79
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Avlasevich SL, Khanal S, Singh P, Torous DK, Bemis JC, Dertinger SD. Flow cytometric method for scoring rat liver micronuclei with simultaneous assessments of hepatocyte proliferation. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2018; 59:176-187. [PMID: 29356121 PMCID: PMC5854533 DOI: 10.1002/em.22168] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Accepted: 12/20/2017] [Indexed: 05/28/2023]
Abstract
The current report describes a newly devised method for automatically scoring the incidence of rat hepatocyte micronuclei (MNHEP) via flow cytometry, with concurrent assessments of hepatocyte proliferation-frequency of Ki-67-positive nuclei, and the proportion of polyploid nuclei. Proof-of-concept data are provided from experiments performed with 6-week old male Crl:CD(SD) rats exposed to diethylnitrosamine (DEN) or quinoline (QUIN) for 3 or 14 consecutive days. Non-perfused liver tissue was collected 4 days after cessation of treatment in the case of 3-day studies, or 1 day after last administration in the case of 14-day studies for processing and flow cytometric analysis. In addition to livers, blood samples were collected one day after final treatment for micronucleated reticulocyte (MN-RET) measurements. Dose-dependent increases in MNHEP, Ki-67-positive nuclei, and polyploidy were observed in 3- and 14-day DEN studies. Both treatment schedules resulted in elevated %MNHEP for QUIN-exposed rats, and while cell proliferation effects were subtle, appreciable increases to normalized liver weights were observed. Whereas DEN caused markedly higher %MNHEP when exposure was extended to two weeks, QUIN-induced MNHEP were slightly increased with protracted dosing. Parallel microscopy-based MNHEP frequencies were highly correlated with flow cytometry-based measurements (four study/aggregate R2 = 0.80). No increases in MN-RET were seen in any of the four studies. Collectively, these results suggest liver micronuclei are amenable to an automated scoring technique that provides objective analyses and higher information content relative to conventional microscopy. Additional work is needed to expand the number and types of chemicals tested, identify the most advantageous treatment schedules, and test the transferability of the method. Environ. Mol. Mutagen. 59:176-187, 2018. © 2018 Wiley Periodicals, Inc.
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Affiliation(s)
| | | | | | | | | | - Stephen D. Dertinger
- Corresponding Author: S.D.D., Litron Laboratories, 3500 Winton Place, Rochester, NY 14623; Tele: 585-442-0930; fax: 585-442-0934;
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80
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Yavuz Kocaman A, Güzelkokar M. The genotoxic and antigenotoxic potential of the methanolic root extract of Glycyrrhiza glabra L. on human peripheral blood lymphocytes. Drug Chem Toxicol 2018; 41:368-375. [DOI: 10.1080/01480545.2018.1435686] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Ayşe Yavuz Kocaman
- Department of Biology, Faculty of Sciences and Letters, Mustafa Kemal University, Hatay, Turkey
| | - Müge Güzelkokar
- Basic and Applied Sciences Institute, Mustafa Kemal University, Hatay, Turkey
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81
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de Alencar Filho AV, Dos Santos Junior VE, da Silva Calixto M, Santos N, Heimer MV, Rosenblatt A. Evaluation of the genotoxic effects of formocresol application in vital pulp therapy of primary teeth: a clinical study and meta-analysis. Clin Oral Investig 2018; 22:2553-2558. [PMID: 29404812 DOI: 10.1007/s00784-018-2352-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Accepted: 01/22/2018] [Indexed: 10/18/2022]
Abstract
OBJECTIVES This in vivo research investigated whether pulp treatments using formocresol for 7 days would cause mutagenic changes in children's lymphocytes. MATERIALS AND METHODS The mutagenicity was tested in lymphocyte cultures established from the peripheral blood of children living in Brazil. The samples consisted of 2000 cells from teeth undergoing formocresol pulpotomies in which the formocresol pellet was sealed in the primary tooth for 7 days. It was removed on the seventh day, the base was placed, and the tooth was restored. Two venous blood samples (6-8 ml) were collected from each child; the first was prior to pulp therapy, and the second was 7 days later. Two thousand metaphases were analyzed. The level of significance adopted for the statistics was P < 0.05, and a random effects meta-analysis was performed combining this and two previous studies. RESULTS There was no significant difference found in the metaphase analysis between the blood samples taken before and after the pulpotomy treatment (Wilcoxon signed rank test); however, the meta-analysis showed a significant difference between the combined studies. CONCLUSIONS This study did not reveal any mutagenic effects, but based on the combined meta-analysis, we recommend the careful use of formocresol. CLINICAL RELEVANCE This research helps to bring scientific evidence of the safe use of formocresol in deciduous pulpotomy treatments.
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Affiliation(s)
- Arnoldo Vasconcelos de Alencar Filho
- Department of Preventive and Social Dentistry, Faculty of Dentistry, University of Pernambuco, Av. Gal. Newton Cavalcanti, 1650, Tabatinga, Camaragibe, PE, 54756-220, Brazil.
| | - Valdeci Elias Dos Santos Junior
- Department of Preventive and Social Dentistry, Faculty of Dentistry, University of Pernambuco, Av. Gal. Newton Cavalcanti, 1650, Tabatinga, Camaragibe, PE, 54756-220, Brazil
| | | | - Neide Santos
- Department of Genetics, Federal University of Pernambuco, Recife, Brazil
| | - Monica Vilela Heimer
- Department of Preventive and Social Dentistry, Faculty of Dentistry, University of Pernambuco, Av. Gal. Newton Cavalcanti, 1650, Tabatinga, Camaragibe, PE, 54756-220, Brazil
| | - Aronita Rosenblatt
- Department of Preventive and Social Dentistry, Faculty of Dentistry, University of Pernambuco, Av. Gal. Newton Cavalcanti, 1650, Tabatinga, Camaragibe, PE, 54756-220, Brazil
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82
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Gajski G, Ladeira C, Gerić M, Garaj-Vrhovac V, Viegas S. Genotoxicity assessment of a selected cytostatic drug mixture in human lymphocytes: A study based on concentrations relevant for occupational exposure. ENVIRONMENTAL RESEARCH 2018; 161:26-34. [PMID: 29100207 DOI: 10.1016/j.envres.2017.10.044] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Revised: 10/23/2017] [Accepted: 10/25/2017] [Indexed: 06/07/2023]
Abstract
Cytostatic drugs are highly cytotoxic agents used in cancer treatment and although their benefit is unquestionable, they have been recognized as hazardous to healthcare professionals in occupational settings. In a working environment, simultaneous exposure to cytostatics may occur creating a higher risk than that of a single substance. Hence, the present study evaluated the combined cyto/genotoxicity of a mixture of selected cytostatics with different mechanisms of action (MoA; 5-fluorouracil, cyclophosphamide and paclitaxel) towards human lymphocytes in vitro at a concentration range relevant for occupational as well as environmental exposure. The results suggest that the selected cytostatic drug mixture is potentially cyto/genotoxic and that it can induce cell and genome damage even at low concentrations. This indicates not only that such mixture may pose a risk to cell and genome integrity, but also that single compound toxicity data are not sufficient for the prediction of toxicity in a complex working environment. The presence of drugs in different amounts and with different MoA suggests the need to study the relationship between the presence of genotoxic components in the mixture and the resulting effects, taking into account the MoA of each component by itself. Therefore, this study provides new data sets necessary for scientifically-based risk assessments of cytostatic drug mixtures in occupational as well as environmental settings.
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Affiliation(s)
- Goran Gajski
- Mutagenesis Unit, Institute for Medical Research and Occupational Health, Zagreb, Croatia.
| | - Carina Ladeira
- Grupo de Investigação em Ambiente e Saúde, Escola Superior de Tecnologia da Saúde de Lisboa, Instituto Politécnico de Lisboa, Lisbon, Portugal; Grupo de Investigação em Genética e Metabolismo, Escola Superior de Tecnologia da Saúde de Lisboa, Instituto Politécnico de Lisboa, Lisbon, Portugal.
| | - Marko Gerić
- Mutagenesis Unit, Institute for Medical Research and Occupational Health, Zagreb, Croatia.
| | - Vera Garaj-Vrhovac
- Mutagenesis Unit, Institute for Medical Research and Occupational Health, Zagreb, Croatia.
| | - Susana Viegas
- Grupo de Investigação em Ambiente e Saúde, Escola Superior de Tecnologia da Saúde de Lisboa, Instituto Politécnico de Lisboa, Lisbon, Portugal; Centro de Investigação em Saúde Pública, Escola Nacional de Saúde Pública, Universidade NOVA de Lisboa, Lisbon, Portugal.
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83
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Plumejeaud S, Reis AP, Tassistro V, Patinha C, Noack Y, Orsière T. Potentially harmful elements in house dust from Estarreja, Portugal: characterization and genotoxicity of the bioaccessible fraction. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2018; 40:127-144. [PMID: 27771821 DOI: 10.1007/s10653-016-9888-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Accepted: 10/13/2016] [Indexed: 06/06/2023]
Abstract
Due to their behavioral characteristics, young children are vulnerable to the ingestion of indoor dust, often contaminated with chemicals that are potentially harmful. Exposure to potentially harmful elements (PHEs) is currently exacerbated by their widespread use in several industrial, agricultural, domestic and technological applications. PHEs cause adverse health effects on immune and nervous systems and can lead to cancer development via genotoxic mechanisms. The present study is an integrated approach that aims at assessing the genotoxicity of bioaccessible PHEs following ingestion of contaminated house dust. A multidisciplinary methodology associating chemical characterization of five house dust samples, extraction of the bioaccessible PHEs in gastric extracts by the unified BARGE method, determination of the bioaccessible fraction and in vitro genotoxicity of gastric extracts in adenocarcinoma gastric human (AGS) cells was developed. The five gastric extracts induced dose-dependent genotoxicity in AGS cells. Copper (bioaccessible concentration up to 111 mg/kg) was probably the prevalent PHE inducing primary DNA damage (up to 5.1-fold increase in tail DNA at 0.53 g/l of gastric extract). Lead (bioaccessible concentration up to 245 mg/kg) was the most prevalent PHE inducing chromosome-damaging effects (r = 0.55; p < 0.001 for micronucleated cells induction). The association of principal component analysis and Spearman's correlations was decisive to understand the chromosome-damaging properties of the bioaccessible PHEs in AGS cells. This methodology could be used on a larger-scale study to provide useful information for science-based decision-making in regulatory policies, and a better estimation of human exposure and associated health risks.
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Affiliation(s)
- Sophie Plumejeaud
- Institut Méditerranéen de Biodiversité et d'Ecologie marine et continentale (IMBE), Aix Marseille Université, CNRS, IRD, Avignon Université, Faculté de Médecine Timone, 27 Bd Jean Moulin, 13005, Marseille, France
| | - Amelia Paula Reis
- GEOBIOTEC, Departmento de Geociências, Universidade de Aveiro, Campus Universitario de Santiago, 3810-193, Aveiro, Portugal
| | - Virginie Tassistro
- Institut Méditerranéen de Biodiversité et d'Ecologie marine et continentale (IMBE), Aix Marseille Université, CNRS, IRD, Avignon Université, Faculté de Médecine Timone, 27 Bd Jean Moulin, 13005, Marseille, France
| | - Carla Patinha
- GEOBIOTEC, Departmento de Geociências, Universidade de Aveiro, Campus Universitario de Santiago, 3810-193, Aveiro, Portugal
| | - Yves Noack
- Aix Marseille Université, CNRS, CEREGE UM34, 13545, Aix-en-Provence, France
| | - Thierry Orsière
- Institut Méditerranéen de Biodiversité et d'Ecologie marine et continentale (IMBE), Aix Marseille Université, CNRS, IRD, Avignon Université, Faculté de Médecine Timone, 27 Bd Jean Moulin, 13005, Marseille, France.
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84
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Gajski G, Gerić M, Oreščanin V, Garaj-Vrhovac V. Cytokinesis-block micronucleus cytome assay parameters in peripheral blood lymphocytes of the general population: Contribution of age, sex, seasonal variations and lifestyle factors. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2018; 148:561-570. [PMID: 29127818 DOI: 10.1016/j.ecoenv.2017.11.003] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Revised: 09/26/2017] [Accepted: 11/01/2017] [Indexed: 06/07/2023]
Abstract
The cytokinesis-block micronucleus cytome (CBMN Cyt) assay was used to evaluate the baseline frequency of cytogenetic damage in peripheral blood lymphocytes of the general population (average age, 38.28 ± 12.83 years) in relation to age, sex, body mass index, seasonal variations (season of sampling, period of sampling and different meteorological parameters) and lifestyle factors (smoking habit, alcohol consumption, exposure to medications and diagnostic radiation, physical activity, and family history of cancer). The background frequency of micronuclei (MNi) for the 200 subjects assayed was 5.06 ± 3.11 per 1000 binucleated cells, while the mean frequency of nucleoplasmic bridges (NPBs) was 1.21 ± 1.46 and of nuclear buds (NBUDs) 3.48 ± 2.14. The background frequency of apoptosis and necrosis was 1.58 ± 1.50 and 1.39 ± 1.56, respectively, while the mean nuclear division index (NDI) was 1.99 ± 0.14. The cut-off value, which corresponds to the 95th percentile of the distribution of 200 individual values, was 11 MNi, 4 NPBs and 7 NBUDs. The study also confirmed an association of the above mentioned parameters with age, sex and several lifestyle factors. Moreover, significant confounders based on our results are also sampling season, sampling period and different meteorological parameters that were dependent on the CBMN Cyt assay parameters. In line with the above mentioned, several factors should be taken into account when it comes to the monitoring of exposed populations using cytogenetic biomarkers. Moreover, the normal and cut-off values obtained in this study present background data for the general population, and can later serve as baseline values for further biomonitoring studies.
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Affiliation(s)
- Goran Gajski
- Institute for Medical Research and Occupational Health, Mutagenesis Unit, 10000 Zagreb, Croatia.
| | - Marko Gerić
- Institute for Medical Research and Occupational Health, Mutagenesis Unit, 10000 Zagreb, Croatia.
| | | | - Vera Garaj-Vrhovac
- Institute for Medical Research and Occupational Health, Mutagenesis Unit, 10000 Zagreb, Croatia.
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85
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Araldi RP, Dos Santos MO, Barbon FF, Manjerona BA, Meirelles BR, de Oliva Neto P, da Silva PI, Dos Santos L, Camargo ICC, de Souza EB. Analysis of antioxidant, cytotoxic and mutagenic potential of Agave sisalana Perrine extracts using Vero cells, human lymphocytes and mice polychromatic erythrocytes. Biomed Pharmacother 2018; 98:873-885. [PMID: 29571258 DOI: 10.1016/j.biopha.2018.01.022] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Revised: 12/31/2017] [Accepted: 01/03/2018] [Indexed: 10/18/2022] Open
Abstract
Brazilian Northeast is the world's largest producer of Agave sisalana Perrine for the supply of the sisal fiber. About 95% of plant biomass, which comprise the mucilage and sisal juice, is considered a waste residual is discarded in the soil. However, the sisal juice is rich in steroidal saponins, which exhibits different pharmacological properties. Despite this, natural products are not necessarily safe. Based on this, this study analyzed the antioxidant, cytotoxic and mutagenic potential of three extracts derived from acid hydrolysis (AHAS), dried precipitate (DPAS) and hexanic of A. sisalana (HAS). These analyses were performed by in vitro and in vivo methods, using Vero cells, human lymphocytes and mice. Results showed that AHAS 50 and 100 can be considered a useful antineoplastic candidate due to their antioxidant and cytotoxic activity, with no genotoxic/clastogenic potential in Vero cells and mice. Although the comet assay in human lymphocytes has showed that the AHAS 25, AHAS 50 and AHAS 100 can lead to DNA breaks, these extracts did not promote DNA damages in mice bone marrow. Considering the different mutagenic responses obtained with the different methods employed, this study suggest that the metabolizing pathways can produce by-products harmful to health. For this reason, it is mandatory to analyze the mutagenic potential by both in vitro and in vivo techniques, using cells derived from different species and origins.
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Affiliation(s)
- Rodrigo Pinheiro Araldi
- Genetics Laboratory, Butantan Institute, São Paulo, SP, Brazil; Biotechnology Interunit Post-Graduation Program, Biomedical Science Institute, University of São Paulo (USP), São Paulo, SP, Brazil
| | - Maristela Oliveira Dos Santos
- Department of Biotechnology, School of Science, Humanities and Languages, São Paulo State University (UNESP), Assis, SP, Brazil
| | - Fabiane Faria Barbon
- Department of Biotechnology, School of Science, Humanities and Languages, São Paulo State University (UNESP), Assis, SP, Brazil
| | - Bruna Aparecida Manjerona
- Department of Biotechnology, School of Science, Humanities and Languages, São Paulo State University (UNESP), Assis, SP, Brazil
| | - Bruno Rosa Meirelles
- Department of Biotechnology, School of Science, Humanities and Languages, São Paulo State University (UNESP), Assis, SP, Brazil
| | - Pedro de Oliva Neto
- Department of Biotechnology, School of Science, Humanities and Languages, São Paulo State University (UNESP), Assis, SP, Brazil
| | - Pedro Ismael da Silva
- Center of Toxins, Immune-Response and Cell Signaling (CeTICS/CEPID), Butantan Institute, São Paulo, SP, Brazil
| | - Lucinéia Dos Santos
- Department of Biotechnology, School of Science, Humanities and Languages, São Paulo State University (UNESP), Assis, SP, Brazil
| | - Isabel Cristina Cherici Camargo
- Department of Biotechnology, School of Science, Humanities and Languages, São Paulo State University (UNESP), Assis, SP, Brazil
| | - Edislane Barreiros de Souza
- Department of Biotechnology, School of Science, Humanities and Languages, São Paulo State University (UNESP), Assis, SP, Brazil.
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86
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Novak M, Žegura B, Modic B, Heath E, Filipič M. Cytotoxicity and genotoxicity of anticancer drug residues and their mixtures in experimental model with zebrafish liver cells. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 601-602:293-300. [PMID: 28558277 DOI: 10.1016/j.scitotenv.2017.05.115] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Revised: 05/10/2017] [Accepted: 05/13/2017] [Indexed: 06/07/2023]
Abstract
Anticancer drugs enter aquatic environment predominantly via hospital and municipal wastewater effluents where they may, due to their genotoxic potential, cause adverse environmental effects even at very low doses. In this study we evaluated cytotoxic and genotoxic potential of two widely used anticancer drugs, cyclophosphamide (CP) and ifosfamide (IF) as individual compounds and in a complex mixture together with 5-fluorouracil (5-FU) and cisplatin (CDDP) because these four drugs have been frequently detected in an oncological ward effluents. As an experimental model we used zebrafish liver cell (ZFL) line. The cytotoxicity was determined with the MTS assay and genotoxicity with the comet assay and cytokinesis block micronucleus (CBMN) assay that measure the formation of DNA strand breaks and genomic instability, respectively. CP and IF exerted low cytotoxicity towards ZFL cells. Both compounds induced DNA strand breaks and genomic instability, however at relatively high concentrations that are not relevant for the contamination of aquatic environment. The mixture of CP, IF, 5-FU and CDDP was tested at maximal detected concentrations of each drug as determined in the effluents from the oncological ward. The mixture was not cytotoxic and did not induce genomic instability, but it induced significant increase in the formation of DNA strand breaks at concentrations of individual compounds that were several orders of magnitude lower from those that were effective when tested as individual compounds. The results indicate that such mixtures of anticancer drugs may pose a threat to aquatic organisms at environmentally relevant concentrations and contribute to the accumulating evidence that it is not always possible to predict adverse effects of complex mixtures based on the toxicological data for individual compounds.
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Affiliation(s)
- Matjaž Novak
- National Institute of Biology, Department of Genetic Toxicology and Cancer Biology, Večna pot 111, 1000 Ljubljana, Slovenia; Ecological Engineering Institute, Ljubljanska ulica 9, 2000 Maribor, Slovenia; Jozef Stefan International Postgraduate School, Jamova cesta 39, 1000 Ljubljana, Slovenia.
| | - Bojana Žegura
- National Institute of Biology, Department of Genetic Toxicology and Cancer Biology, Večna pot 111, 1000 Ljubljana, Slovenia.
| | - Barbara Modic
- National Institute of Biology, Department of Genetic Toxicology and Cancer Biology, Večna pot 111, 1000 Ljubljana, Slovenia
| | - Ester Heath
- Institute Jozef Stefan, Jadranska 29, 1000 Ljubljana, Slovenia.
| | - Metka Filipič
- National Institute of Biology, Department of Genetic Toxicology and Cancer Biology, Večna pot 111, 1000 Ljubljana, Slovenia.
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87
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Tahrani L, Van Loco J, Anthonissen R, Verschaeve L, Ben Mansour H, Reyns T. Identification and risk assessment of human and veterinary antibiotics in the wastewater treatment plants and the adjacent sea in Tunisia. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2017; 76:3000-3021. [PMID: 29210687 DOI: 10.2166/wst.2017.465] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In the following study, we came up with and validated a prompt, sensitive and precise method for the simultaneous determination of 56 antimicrobial drugs (tetracyclines, sulfonamides, β-lactams, macrolides and quinolones) using the ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). This method was implemented with success to determine antibiotics in samples collected from four wastewater treatment plants and five coasts in Tunisia. Results showed the presence of high concentrations of antibiotics that ranged from 0.1 to 646 ng mL-1, which can induce many negative impacts on health and the environment. For this reason, we have opted to evaluate toxicity of wastewater samples using a battery of biotests. In fact, genotoxicity was assessed using three tests: Vitotox, comet and micronucleus assays. The input and output of wastewater treatment plants induced a strongly genotoxic effect on the Salmonella typhimurium TA104 prokaryotic Vitotox assay. This result was confirmed using the comet and the micronucleus assays performed on the human liver hepatocellular carcinoma cells. The genotoxic power of the tested wastewater treatment plants' samples could be attributed to the presence of the higher quantities of antibiotics that are detected in these samples and to the antibiotic and organic compound cocktails.
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Affiliation(s)
- Leyla Tahrani
- Research Unit of Analysis and Process Applied to the Environment-APAE UR17ES32 Higher Institute of Applied Sciences and Technology, University of Monastir, Mahdia 5100, Tunisia E-mail: ; Laboratory of Chemical Residues and Contaminants, Direction of Food Medicines and Consumer Safety, Scientific Institute of Public Health, Juliette Wytsmanstraat 14, Brussels 1050, Belgium; Laboratory of Toxicology, Scientific Institute of Public Health, Juliette Wytsmanstraat 14, Brussels 1050, Belgium
| | - Joris Van Loco
- Laboratory of Chemical Residues and Contaminants, Direction of Food Medicines and Consumer Safety, Scientific Institute of Public Health, Juliette Wytsmanstraat 14, Brussels 1050, Belgium
| | - Roel Anthonissen
- Laboratory of Toxicology, Scientific Institute of Public Health, Juliette Wytsmanstraat 14, Brussels 1050, Belgium
| | - Luc Verschaeve
- Laboratory of Toxicology, Scientific Institute of Public Health, Juliette Wytsmanstraat 14, Brussels 1050, Belgium; Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium
| | - Hedi Ben Mansour
- Research Unit of Analysis and Process Applied to the Environment-APAE UR17ES32 Higher Institute of Applied Sciences and Technology, University of Monastir, Mahdia 5100, Tunisia E-mail:
| | - Tim Reyns
- Laboratory of Chemical Residues and Contaminants, Direction of Food Medicines and Consumer Safety, Scientific Institute of Public Health, Juliette Wytsmanstraat 14, Brussels 1050, Belgium
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88
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Aydın M, Arslan M, Rencüzoğulları E, Gözaydın C, Genç A, Bayram S. Investigation of XRCC1 Arg399Gln, Arg280His, and Arg194Trp polymorphisms effects on the induction of micronucleus by Aflatoxin B1 in in vitro. GENE REPORTS 2017. [DOI: 10.1016/j.genrep.2017.08.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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89
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Acésio NO, Carrijo GS, Batista TH, Damasceno JL, Côrrea MB, Tozatti MG, Cunha WR, Tavares DC. Assessment of the antioxidant, cytotoxic, and genotoxic potential of the Annona muricata leaves and their influence on genomic stability. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2017; 80:1290-1300. [PMID: 28956726 DOI: 10.1080/15287394.2017.1377653] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Revised: 09/06/2016] [Accepted: 09/07/2017] [Indexed: 06/07/2023]
Abstract
The popular use of Annona muricata L. is based upon a range of medicinal purposes, and the plant exhibits biological activities including antihyperglycemic, antiparasitic, and antitumor activities. The objectives of this study were to examine the antioxidant, cytotoxic, and genotoxic potential of the hydroalcoholic extract of A. muricata leaves (AMEs), as well as its effects on genotoxicity induced by methyl methanesulfonate (MMS) and hydrogen peroxide (H2O2). The results using 2,2-diphenyl-1-picrylhydrazyl assay showed that AME was able to scavenge 44.71% of free radicals. The extract significantly reduced the viability of V79 cells in the clonogenic assay at concentrations ≥8 µg/ml. No significant differences in micronucleus (MN) frequency were observed between V79 cell cultures treated with different concentrations of the extract (0.125, 0.25, 0.5, and 1 µg/ml) and negative control. When AME concentrations were combined with MMS, data revealed no marked differences from mutagen alone. In contrast, significant reductions in the frequencies of MN were noted in cultures treated with AME combined with H2O2 compared to H2O2 alone. In vivo studies found no significant differences in the frequencies of micronucleated polychromatic erythrocytes (MNPCEs) between animals treated with different AME doses compared to control. Animals treated with AME doses of 125 and 250 mg/kg and MMS exhibited significantly higher frequencies of MNPCE compared to mutagen alone. In conclusion, under current experimental conditions, AME was not genotoxic and exerted a modulatory effect on DNA damage depending upon the experimental conditions. The extract did not influence markedly MMS-induced genotoxicity in in vitro test system. However, the extract increased DNA damage induced by mutagen in mice. In V79 cells, AME reduced the genotoxicity produced by H2O2, and this protective effect was attributed in part to the antioxidant activity of AME.
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Affiliation(s)
| | | | | | | | | | | | - Wilson Roberto Cunha
- a Postgraduate program in Sciences , Universidade de Franca , Franca SP , Brazil
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90
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Møller P, Jacobsen NR. Weight of evidence analysis for assessing the genotoxic potential of carbon nanotubes. Crit Rev Toxicol 2017; 47:867-884. [DOI: 10.1080/10408444.2017.1367755] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Peter Møller
- Department of Public Health, Section of Environmental Health, University of Copenhagen, Copenhagen K, Denmark
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91
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Turkez H, Arslan ME, Ozdemir O. Genotoxicity testing: progress and prospects for the next decade. Expert Opin Drug Metab Toxicol 2017; 13:1089-1098. [DOI: 10.1080/17425255.2017.1375097] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Hasan Turkez
- Faculty of Science, Department of Molecular Biology and Genetics, Erzurum Technical University, Erzurum, Turkey
- Department of Pharmacy, University ‘G. d’Annunzio’, Chieti, Italy
| | - Mehmet E. Arslan
- Faculty of Science, Department of Molecular Biology and Genetics, Erzurum Technical University, Erzurum, Turkey
| | - Ozlem Ozdemir
- Faculty of Science, Department of Molecular Biology and Genetics, Erzurum Technical University, Erzurum, Turkey
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92
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Cobanoglu H, Coskun M, Çayir A, Coskun M. In vitro genotoxic and cytotoxic effects of doxepin and escitalopram on human peripheral lymphocytes. Drug Chem Toxicol 2017; 41:238-244. [PMID: 28854817 DOI: 10.1080/01480545.2017.1365885] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Antidepressants are drugs used for the treatment of many psychiatric conditions including depression. There are findings suggesting that these drugs might have genotoxic, carcinogenic, and/or mutagenic effects. Therefore, the present in vitro study is intended to investigate potential genotoxic and cytotoxic effects of the antidepressants escitalopram (selective serotonin reuptake inhibitor) and doxepin (Tricyclic antidepressant) on human peripheral lymphocytes cytokinesis-block micronucleus (CBMN), sister chromatid exchange (SCE), and single cell gel electrophoresis (alkaline comet assay) were used for the purpose of the study. In the study, four different concentrations of both drugs (1, 2.5, 5, and 10 µg/mL) were administered to human peripheral lymphocytes for 24 h. The tested concentrations of both drugs were found to exhibit no cytotoxic and mitotic inhibitory effects. SCE increase caused by 5 and 10 µg/mL of escitalopram was found statistically significant, while no statistically significant increase was observed in DNA damage and micronucleus (MN) formation. Moreover, the increase caused by doxepin in MN formation was not found statistically significant. Besides, 10 µg/mL of doxepin was demonstrated to significantly increase arbitrary unit and SCE formation. These findings suggest that the investigated concentrations of escitalopram and doxepin were non-cytotoxic but potentially genotoxic at higher concentrations.
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Affiliation(s)
- Hayal Cobanoglu
- a Health Services Vocational College, Çanakkale Onsekiz Mart University , Çanakkale , Turkey
| | - Mahmut Coskun
- b Faculty of Medicine, Department of Medical Biology , Çanakkale Onsekiz Mart University , Terzioglu Campus , Çanakkale , Turkey
| | - Akin Çayir
- a Health Services Vocational College, Çanakkale Onsekiz Mart University , Çanakkale , Turkey
| | - Munevver Coskun
- a Health Services Vocational College, Çanakkale Onsekiz Mart University , Çanakkale , Turkey
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93
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Topaktas M, Kafkas NE, Sadighazadi S, Istifli ES. In vitro cytogenetic toxicity of bezafibrate in human peripheral blood lymphocytes. Cytotechnology 2017; 69:579-589. [PMID: 28097454 PMCID: PMC5507839 DOI: 10.1007/s10616-017-0069-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Accepted: 01/11/2017] [Indexed: 01/14/2023] Open
Abstract
Bezafibrate (BF) is a peroxisome proliferator-activated receptor (PPAR) agonist used as a lipid-lowering agent to treat both the familial or acquired combined forms of hyperlipidemia. BF is the only available fibrate drug that acts on all PPAR subtypes of α, β, and δ. Although there are studies that indicate a genotoxic potential associated with the use of fibrates, to our knowledge, the genotoxicity of BF in human peripheral blood lymphocytes has not been studied. In the present study, the genotoxic potential of BF was evaluated using chromosome aberration (CA) and micronucleus (MN) assays in peripheral blood lymphocytes of healthy human subjects. In addition, a high performance liquid chromatography (HPLC) method was used to identify and quantitate the drug passage into the cells. Human peripheral blood lymphocytes were exposed to four different concentrations (100, 175, 250 and 325 μg/mL) of BF for 24- and 48-h treatment periods. As shown by HPLC, in spite of significant passage of BF into human peripheral blood lymphocytes in 24- and 48-h treatment periods, BF was not found to increase the CA and MN frequency. On the other hand, exposing cells to BF for 24- and 48-h treatment periods caused significant concentration-dependent decreases in the mitotic index (r = -0.995, p < 0.01 for 24-h; r = -0.992, p < 0.01 for 48-h) and nuclear division index (r = -0.990, p < 0.01 for 24-h; r = -0.981, p < 0.01 for 48-h). Our results suggest that BF has cytotoxic effect on cultured human peripheral blood lymphocytes.
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Affiliation(s)
- M Topaktas
- Department of Biology, Faculty of Science and Letters, Cukurova University, 01330, Adana, Turkey
| | - N E Kafkas
- Department of Horticulture, Faculty of Agriculture, Cukurova University, 01330, Adana, Turkey
| | - S Sadighazadi
- Department of Biology, Institute of Basic and Applied Sciences, Cukurova University, 01330, Adana, Turkey
| | - E S Istifli
- Department of Biology, Faculty of Science and Letters, Cukurova University, 01330, Adana, Turkey.
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94
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Groh KJ, Muncke J. In Vitro Toxicity Testing of Food Contact Materials: State-of-the-Art and Future Challenges. Compr Rev Food Sci Food Saf 2017; 16:1123-1150. [PMID: 33371616 DOI: 10.1111/1541-4337.12280] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 05/15/2017] [Accepted: 05/25/2017] [Indexed: 12/22/2022]
Abstract
Currently, toxicological testing of food contact materials (FCMs) is focused on single substances and their genotoxicity. However, people are exposed to mixtures of chemicals migrating from food contact articles (FCAs) into food, and toxic effects other than genotoxic damage may also be relevant. Since FCMs can be made of more than 8 thousand substances, assessing them one-by-one is very resource-consuming. Moreover, finished FCAs usually contain non-intentionally added substances (NIAS). NIAS toxicity can only be tested if a substance's chemical identity is known and if it is available as a pure chemical. Often, this is not the case. Nonetheless, regulations require safety assessments for all substances migrating from FCAs, including NIAS, hence new approaches to meet this legal obligation are needed. Testing the overall migrate or extract from an FCM/FCA is an option. Ideally, such an assessment would be performed by means of in vitro bioassays, as they are rapid and cost-effective. Here, we review the studies using in vitro bioassays to test toxicity of FCMs/FCAs. Three main categories of in vitro assays that have been applied include assays for cytotoxicity, genotoxicity, and endocrine disruption potential. In addition, we reviewed studies with small multicellular animal-based bioassays. Our overview shows that in vitro testing of FCMs is in principle feasible. We discuss future research needs and FCM-specific challenges. Sample preparation procedures need to be optimized and standardized. Further, the array of in vitro tests should be expanded to include those of highest relevance for the most prevalent human diseases of concern.
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Affiliation(s)
- Ksenia J Groh
- Food Packaging Forum Foundation, Staffelstrasse 8, CH-8045, Zürich, Switzerland
| | - Jane Muncke
- Food Packaging Forum Foundation, Staffelstrasse 8, CH-8045, Zürich, Switzerland
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95
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Sharaf Al- A. Genotoxicity Assessment of Fresh Khat Leaves Extract in Chinese Hamster Ovary Cell Lines. JOURNAL OF MEDICAL SCIENCES 2017. [DOI: 10.3923/jms.2017.126.132] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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96
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Hara RV, Marin-Morales MA. In vitro and in vivo investigation of the genotoxic potential of waters from rivers under the influence of a petroleum refinery (São Paulo State - Brazil). CHEMOSPHERE 2017; 174:321-330. [PMID: 28183058 DOI: 10.1016/j.chemosphere.2017.01.142] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Revised: 01/25/2017] [Accepted: 01/28/2017] [Indexed: 06/06/2023]
Abstract
In recent years concern about the chemical composition of wastewater generated by the oil refining industry has increased, even after its treatment. These wastewaters contain substances that can harm both the entire aquatic ecosystem and the health of any exposed organisms. The aim of this study was to evaluate the genotoxic and mutagenic potentials of the effluent generated by the largest Brazilian petroleum refinery, the effectiveness of the treatments used by the refinery, and whether its effluent can compromise the water quality of the river where it is discarded. Chromosomal aberration and micronucleus assays were performed in Allium cepa and micronucleus test in mammalian cell culture (CHO-K1). The samples were collected in three sites at the refinery: one site on the Jaguari River and two sites on the Atibaia Rivers (upstream and downstream of the discharged effluent), under three different climatic conditions. Tests with A. cepa showed increased frequencies of chromosomal aberrations and micronuclei in meristematic cells for the effluent after physico-chemical treatment, but the samples after treatment biological and stabilization pond presented none of these abnormalities. It was observed that the induced damage in the meristematic cells was not observed in the F1 cells of A. cepa roots. The micronucleus test performed with mammalian cell culture also indicated that the effluent, after physico-chemical treatment, induced a significant increase in micronucleus frequencies. Plant and hamster cells exposed to the other samples collected inside the refinery and in the Jaguari and Atibaia Rivers did not present evidence of genotoxicity and mutagenicity in the tests performed. This study showed that the effluent treated carried out by the refinery (biological treatment followed by a stabilization pond) proved to be efficient for the removal of the toxic load still present after the physico-chemical treatment, since no change in the quality of the Atibaia River was observed. However, because this is an industry with a high production of effluent with toxic potential, its effluents must be constantly monitored, so that there is no compromise of the water quality of the receiving river.
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Affiliation(s)
- Raquel Vaz Hara
- UNESP - Institute of Biosciences, Department of Biology, Av 24-A, 1515, CEP 13506-900, Rio Claro, São Paulo, Brazil
| | - Maria Aparecida Marin-Morales
- UNESP - Institute of Biosciences, Department of Biology, Av 24-A, 1515, CEP 13506-900, Rio Claro, São Paulo, Brazil.
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97
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Zafalon-Silva B, Zebral YD, Bianchini A, da Rosa CE, Marins LF, Colares EP, Martinez PE, Bobrowski VL, Robaldo RB. Erythrocyte nuclear abnormalities and leukocyte profile in the Antarctic fish Notothenia coriiceps after exposure to short- and long-term heat stress. Polar Biol 2017. [DOI: 10.1007/s00300-017-2099-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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98
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Assessment of the genotoxicity of the tyrosine kinase inhibitor imatinib mesylate in cultured fish and human cells. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2017; 814:14-21. [DOI: 10.1016/j.mrgentox.2016.12.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Revised: 12/17/2016] [Accepted: 12/19/2016] [Indexed: 11/19/2022]
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99
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Sannino A, Zeni O, Romeo S, Massa R, Scarfi MR. Adverse and beneficial effects in Chinese hamster lung fibroblast cells following radiofrequency exposure. Bioelectromagnetics 2017; 38:245-254. [DOI: 10.1002/bem.22034] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Accepted: 12/18/2016] [Indexed: 12/26/2022]
Affiliation(s)
- Anna Sannino
- CNR—Institute for Electromagnetic Sensing of the EnvironmentNapoliItaly
| | - Olga Zeni
- CNR—Institute for Electromagnetic Sensing of the EnvironmentNapoliItaly
| | - Stefania Romeo
- CNR—Institute for Electromagnetic Sensing of the EnvironmentNapoliItaly
| | - Rita Massa
- CNR—Institute for Electromagnetic Sensing of the EnvironmentNapoliItaly
- Department of Physics “Ettore Pancini”University of Naples Federico IINapoliItaly
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100
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Vlastos D, Dailianis S, Kindou A, Antonopoulou M, Gianni A, Zacharias I. Assessing the environmental/human risk of potential genotoxicants in water samples from lacustrine ecosystems: The case of lakes in Western Greece. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 574:246-252. [PMID: 27639021 DOI: 10.1016/j.scitotenv.2016.09.042] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Revised: 09/04/2016] [Accepted: 09/06/2016] [Indexed: 06/06/2023]
Abstract
Lakes, representing major freshwater resources, play a crucial role for both humans and ecosystems. Based on the increasing international interest in the contamination of water resources by genotoxic compounds, the present study aimed to evaluate the genotoxic potential of surface water samples collected from the five (5) lakes (Amvrakia, Lysimachia, Ozeros, Trichonida, Kastraki) located in Aitoloakarnania regional unit (Western Greece). The genotoxic potential of surface water samples was evaluated by employing the Cytokinesis Block MicroNucleus (CBMN) assay in cultured human lymphocytes. In the former assay, lymphocytes were treated with 1, 2 and 5% (v/v) of surface water from each lake. Statistically significant differences (1.7 to 3.3 fold increase in MN frequencies vs. the control) were seen at the dose of 5% (v/v) in all studied lakes. At the dose of 2% (v/v) statistically significant differences (1.7 to 2.6 fold increase in MN frequencies vs. the control) were observed in all studied lakes except Trichonida lake. Finally, at the dose of 1% (v/v) statistically significant differences (2.3 and 2.5 fold increase in MN frequencies vs. the control) were observed in the Ozeros and Lysimachia lakes. The evaluation of the potential genotoxic effects and the analysis of the physicochemical parameters of lakes' surface water samples is a first step in our effort to evaluate the water quality, in terms of the presence and environmental/human risk of genotoxicants in the studied lake ecosystems. The present study showed for the first time the presence of genotoxic substances in surface waters of the studied lakes.
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Affiliation(s)
- Dimitris Vlastos
- Department of Environmental and Natural Resources Management, University of Patras, 30100, Agrinio, Greece.
| | - Stefanos Dailianis
- Department of Biology, Section of Animal Biology, School of Natural Sciences, University of Patras, 26500, Patras, Greece
| | - Aggeliki Kindou
- Department of Environmental and Natural Resources Management, University of Patras, 30100, Agrinio, Greece
| | - Maria Antonopoulou
- Department of Environmental and Natural Resources Management, University of Patras, 30100, Agrinio, Greece
| | - Areti Gianni
- Department of Environmental and Natural Resources Management, University of Patras, 30100, Agrinio, Greece
| | - Ierotheos Zacharias
- Department of Environmental and Natural Resources Management, University of Patras, 30100, Agrinio, Greece
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