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Sharma M, Devi P, Kaushal S, Ul-Ahsan A, Mehra S, Budhwar M, Chopra M. Cyto and Genoprotective Potential of Tannic Acid Against Cadmium and Nickel Co-exposure Induced Hepato-Renal Toxicity in BALB/c Mice. Biol Trace Elem Res 2024:10.1007/s12011-024-04117-4. [PMID: 38393487 DOI: 10.1007/s12011-024-04117-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Accepted: 02/17/2024] [Indexed: 02/25/2024]
Abstract
Tannic acid (TA) is a metal chelating polyphenol that plays a crucial role in metal detoxification, but its modulatory role in co-exposure of these heavy metals' exposure needs to be explored. Cadmium (Cd) and nickel (Ni) are inorganic hazardous chemicals in the environment. Humans are prone to be exposed to the co-exposure of Cd and Ni, but the toxicological interactions of these metals are poorly defined. Present study was undertaken to study the preventive role of TA in Cd-Ni co-exposure-evoked hepato-renal toxicity in BALB/c mice. In the current investigation, increased oxidative stress in metal intoxicated groups was confirmed by elevated peroxidation of the lipids and significant lowering of endogenous antioxidant enzymes. Altered hepato-renal serum markers, DNA fragmentation, and histological alterations were also detected in the metal-treated groups. Present study revealed that Cd is a stronger toxicant than Ni and when co-exposure was administered, additive, sub-additive, and detrimental effects were observed. Prophylactic treatment with TA significantly reinstated the levels of lipid peroxidation (LPO), non-enzymatic, and enzymatic antioxidants. Moreover, it also restored the serum biomarker levels, DNA damage, and histoarchitecture of the given tissues. TA due to its metal chelating and anti-oxidative properties exhibited cyto- and genoprotective potential against Cd-Ni co-exposure-induced hepatic and renal injury.
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Affiliation(s)
- Madhu Sharma
- Cell and Molecular Biology Lab, Department of Zoology, Panjab University, Chandigarh, India, 160014
| | - Pooja Devi
- Cell and Molecular Biology Lab, Department of Zoology, Panjab University, Chandigarh, India, 160014
| | - Surbhi Kaushal
- School of Basic and Applied Sciences, Maharaja Agrasen University, Solan, Himachal Pradesh, India, 174103
| | - Aitizaz Ul-Ahsan
- Cell and Molecular Biology Lab, Department of Zoology, Panjab University, Chandigarh, India, 160014
| | - Sweety Mehra
- Cell and Molecular Biology Lab, Department of Zoology, Panjab University, Chandigarh, India, 160014
| | - Muskan Budhwar
- Cell and Molecular Biology Lab, Department of Zoology, Panjab University, Chandigarh, India, 160014
| | - Mani Chopra
- Cell and Molecular Biology Lab, Department of Zoology, Panjab University, Chandigarh, India, 160014.
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2
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Ortiz-García RG, Gómez-Meda BC, Gutiérrez-Sevilla JE, Gallegos-Arreola MP, Zamora-Perez AL, Ortiz-García YM, García-Arias VE, Torres-Mendoza BM, Zúñiga-González GM. Micronuclei and nuclear buds in amniotic tissue of rats treated with cyclophosphamide. MUTATION RESEARCH. GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2023; 890:503659. [PMID: 37567649 DOI: 10.1016/j.mrgentox.2023.503659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 06/27/2023] [Accepted: 07/11/2023] [Indexed: 08/13/2023]
Abstract
Fetal development can be altered by DNA damage caused by maternal exposure to chemical, physical, or biological agents during gestation. One method of assessing genotoxicity is to detect micronuclei (MNs) and/or nuclear abnormalities. This can be performed in vivo and requires only frequently dividing tissues, such as amniotic tissue (AT), which is in contact with the fetal environment and is composed of very thin layers of cells. This study evaluated the presence of MNs, nucleoplasmic bridges, and nuclear buds (NBs) in the fetal AT following maternal exposure to cyclophosphamide (CP) during pregnancy. Pregnant Wistar rats were divided into a negative control group and an experimental group that was orally administered CP (10 mg/kg). Daily blood smears were obtained from pregnant rats on days 14-19 of gestation. The rats were dissected, and fetal ATs were obtained on the 19th day of gestation. The MN and NB frequencies in AT cells were analyzed using a fluorescence microscope (100 ×). Micronucleated erythrocytes in the peripheral blood of the control rats were also assessed. Micronucleated polychromatic erythrocyte frequencies were significantly higher than those in the controls. Polychromatic erythrocyte frequencies were lower in CP-treated rats than in controls at 48-120 h. Fetuses in the CP-treated group also showed a significant increase in MNs and NBs in AT cells. In conclusion, AT could be used for analyzing MNs and NBs in rats following maternal exposure to a genotoxic agent and as a viable alternative for analyzing the integrity of fetal DNA during gestation.
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Affiliation(s)
- Ramón Guillermo Ortiz-García
- Doctorado en Genética Humana, Departamento de Biología Molecular y Genómica, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara, Jalisco, Mexico; Laboratorio de Mutagénesis, División de Medicina Molecular, Centro de Investigación Biomédica de Occidente, Instituto Mexicano del Seguro Social, Guadalajara, Jalisco, Mexico
| | - Belinda Claudia Gómez-Meda
- Instituto de Genética Humana "Dr. Enrique Corona Rivera", Departamento de Biología Molecular y Genómica, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara, Jalisco, Mexico
| | - Juan Ernesto Gutiérrez-Sevilla
- Laboratorio de Inmunodeficiencias y retrovirus humanos, División de Neurociencias, Centro de Investigación Biomédica de Occidente, Instituto Mexicano del Seguro Social, Guadalajara, Jalisco, Mexico; Departamento de Clínicas Medicas, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara, Jalisco, Mexico
| | - Martha Patricia Gallegos-Arreola
- Laboratorio de Genética Molecular, División de Genética, Centro de Investigación Biomédica de Occidente, Instituto Mexicano del Seguro Social, Guadalajara, Jalisco, Mexico
| | - Ana Lourdes Zamora-Perez
- Instituto de Investigación en Odontología, Departamento de Clínicas Odontológicas Integrales, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara, Jalisco, Mexico
| | - Yveth Marlene Ortiz-García
- Instituto de Investigación en Odontología, Departamento de Clínicas Odontológicas Integrales, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara, Jalisco, Mexico; Laboratorio de Apoyo a la Vigilancia e Investigación Epidemiológica, Centro de Investigación Biomédica de Occidente, Instituto Mexicano del Seguro Social, Guadalajara, Jalisco, Mexico
| | - Víctor Eduardo García-Arias
- Laboratorio de Mutagénesis, División de Medicina Molecular, Centro de Investigación Biomédica de Occidente, Instituto Mexicano del Seguro Social, Guadalajara, Jalisco, Mexico
| | - Blanca Miriam Torres-Mendoza
- Laboratorio de Inmunodeficiencias y retrovirus humanos, División de Neurociencias, Centro de Investigación Biomédica de Occidente, Instituto Mexicano del Seguro Social, Guadalajara, Jalisco, Mexico; Departamento de Clínicas Medicas, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara, Jalisco, Mexico
| | - Guillermo Moisés Zúñiga-González
- Laboratorio de Mutagénesis, División de Medicina Molecular, Centro de Investigación Biomédica de Occidente, Instituto Mexicano del Seguro Social, Guadalajara, Jalisco, Mexico.
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3
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Aguilera-Rodríguez FR, Zamora-Perez AL, Gutiérrez-Hernández R, Quirarte-Báez SM, Reyes Estrada CA, Ortiz-García YM, Lazalde-Ramos BP. Teratogen Potential Evaluation of the Aqueous and Hydroalcoholic Leaf Extracts of Crataegus oxyacantha in Pregnancy Rats. PLANTS (BASEL, SWITZERLAND) 2023; 12:2388. [PMID: 37376012 DOI: 10.3390/plants12122388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 06/07/2023] [Accepted: 06/17/2023] [Indexed: 06/29/2023]
Abstract
Crataegus oxyacantha is used in the treatment of cardiovascular diseases. The aim of this study was to evaluate the transplacental genotoxicity effect of aqueous (AE) and hydroalcoholic extract (HE) of leaves C. oxyacantha in a rat model and the quantification of malondialdehyde (MDA) in the liver. Three different doses of the AE and HE of the C. oxyacantha leaf were administered orally (500, 1000 and 2000 mg/kg) to Wistar rats during 5 days through the pregnancy term (16-21 days), and sampling in rats occurred every 24 h during the last 6 days of gestation, while only one sample was taken in neonates at birth. A sample of the mother's and the neonate's liver was taken for the determination of MDA. The results show that, at the hepatic level, the evaluated doses of extracts C. oxyacantha in pregnant rats and their pups did not show cytotoxicity. However, the AE and HE generated cytotoxic and genotoxic damage in the short term. On the other hand, only the AE showed a teratogenic effect. Based on these results, the AE and HE of the C. oxyacantha leaf should not be administered during pregnancy.
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Affiliation(s)
- Fany Renata Aguilera-Rodríguez
- Maestría en Ciencias y Tecnología Química, Unidad Académica de Ciencias Químicas, Universidad Autónoma de Zacatecas, Zacatecas 98000, Mexico
| | - Ana Lourdes Zamora-Perez
- Instituto de Investigación en Odontología, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Jalisco 44340, Mexico
| | - Rosalinda Gutiérrez-Hernández
- Licenciatura en Nutrición, Unidad Académica de Enfermería, Universidad Autónoma de Zacatecas, Zacatecas 98000, Mexico
| | | | - Claudia Araceli Reyes Estrada
- Maestría en Ciencias de la Salud, Unidad Académica de Medicina Humana, Universidad Autónoma de Zacatecas, Zacatecas 98000, Mexico
| | - Yveth Marlene Ortiz-García
- Instituto de Investigación en Odontología, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Jalisco 44340, Mexico
| | - Blanca Patricia Lazalde-Ramos
- Maestría en Ciencias y Tecnología Química, Unidad Académica de Ciencias Químicas, Universidad Autónoma de Zacatecas, Zacatecas 98000, Mexico
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4
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Zúñiga-González GM, Martínez-Sánchez JO, Zamora-Perez AL, Gallegos-Arreola MP, Torres-Mendoza BM, Gutiérrez-Sevilla JE, Sánchez-Parada MG, Barros-Hernández A, Gómez-Meda BC. Micronuclei analysis in mice peripheral blood exposed to polarized polychromatic noncoherent light (Bioptron® Light). JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY 2023. [DOI: 10.1016/j.jpap.2023.100164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
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5
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Evaluation of Genotoxic Effect and Antigenotoxic Potential against DNA Damage of the Aqueous and Ethanolic Leaf Extracts of Annona muricata Using an In Vivo Erythrocyte Rodent Micronucleus Assay. BIOMED RESEARCH INTERNATIONAL 2022; 2022:9554011. [PMID: 36567911 PMCID: PMC9788883 DOI: 10.1155/2022/9554011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/21/2022] [Revised: 11/04/2022] [Accepted: 11/17/2022] [Indexed: 12/23/2022]
Abstract
Annona muricata have been extensively used in traditional medicine to treat multiple diseases, including cancers. This study evaluated the genotoxic potential and antigenotoxic activities of A. muricata aqueous and ethanolic leaf extracts by employing an in vivo erythrocyte rodent micronucleus assay. Different doses (187.5, 375, and 750 mg/kg) of both extracts were administered orally for 5 days alone and combined with cyclophosphamide (CP, 60 mg/kg) to BALB/c mice. Also, it was administered orally to Wistar rats for 5 days through the final stage of gestation. No genotoxic or cytotoxic effects were observed in the two adult rodent models when A. muricata was administered orally nor in newborn rats transplacentally exposed to the extracts. Moreover, A. muricata aqueous and ethanolic leaf extracts demonstrated a protective effect against CP-induced DNA damage. Due to its lack of genotoxic effect and its capacity to decrease DNA damage, A. muricata is likely to open an interest field regarding its potential safe use in clinical applications.
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6
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Boulaka A, Mantellou P, Stanc GM, Souka E, Valavanis C, Saxami G, Mitsou E, Koutrotsios G, Zervakis GI, Kyriacou A, Pletsa V, Georgiadis P. Genoprotective activity of the Pleurotus eryngii mushrooms following their in vitro and in vivo fermentation by fecal microbiota. Front Nutr 2022; 9:988517. [PMID: 36082029 PMCID: PMC9445615 DOI: 10.3389/fnut.2022.988517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Accepted: 08/08/2022] [Indexed: 11/19/2022] Open
Abstract
Pleurotus eryngii mushrooms are commercially cultivated and widely consumed due to their organoleptic properties, and the low caloric and high nutritional value. In addition, they contain various biologically active and health-promoting compounds; very recently, their genoprotective effect in Caco-2 cells after their fermentation by the human fecal microbiota was also documented. In the current study, the effect of P. eryngii pre- and post-fermentation supernatants in micronuclei formation was evaluated in human lymphocytes. In addition, the genoprotective properties of increasing concentrations of aqueous extracts from P. eryngii mushrooms (150, 300, 600 mg/kg) against the cyclophosphamide-induced DNA damage were studied in young and elderly female and male mice in bone marrow and whole blood cells. The ability of the highest dose (600 mg/kg) to regulate the main cellular signaling pathways was also evaluated in gut and liver tissues of female animals by quantifying the mRNA expression of NrF2, Nfkβ, DNMT1, and IL-22 genes. P. eryngii post-fermentation, but not pre-fermentation, supernatants were able to protect human lymphocytes from the mitomycin C-induced DNA damage in a dose-dependent manner. Similarly, genoprotection was also observed in bone marrow cells of mice treated by gavage with P. eryngii extract. The effect was observed in all the experimental groups of mice (young and elderly, male and female) and was more potent in young female mice. Overexpression of all genes examined was observed in both tissues, mainly among the elderly animals. In conclusion, P. eryngii mushrooms were shown to maintain genome integrity through protecting cells from genotoxic insults. These beneficial effects can be attributed to their antioxidant and immunomodulatory properties, as well as their ability to regulate the cell’s epigenetic mechanisms and maintain cell homeostasis.
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Affiliation(s)
- Athina Boulaka
- Laboratory of Environment and Health, Institute of Chemical Biology, National Hellenic Research Foundation, Athens, Greece
| | - Panagiota Mantellou
- Laboratory of Environment and Health, Institute of Chemical Biology, National Hellenic Research Foundation, Athens, Greece
- Department of Biological Applications and Technology, University of Ioannina, Ioannina, Greece
| | - Gabriela-Monica Stanc
- Department of Pathology, Molecular Pathology Unit, Metaxa Cancer Hospital, Piraeus, Greece
| | - Efthymia Souka
- Department of Pathology, Molecular Pathology Unit, Metaxa Cancer Hospital, Piraeus, Greece
| | - Christoς Valavanis
- Department of Pathology, Molecular Pathology Unit, Metaxa Cancer Hospital, Piraeus, Greece
| | - Georgia Saxami
- Department of Nutrition and Dietetics, Harokopio University, Athens, Greece
| | - Evdokia Mitsou
- Department of Nutrition and Dietetics, Harokopio University, Athens, Greece
| | - Georgios Koutrotsios
- Laboratory of General and Agricultural Microbiology, Agricultural University of Athens, Athens, Greece
| | - Georgios I. Zervakis
- Laboratory of General and Agricultural Microbiology, Agricultural University of Athens, Athens, Greece
| | | | - Vasiliki Pletsa
- Laboratory of Environment and Health, Institute of Chemical Biology, National Hellenic Research Foundation, Athens, Greece
| | - Panagiotis Georgiadis
- Laboratory of Environment and Health, Institute of Chemical Biology, National Hellenic Research Foundation, Athens, Greece
- *Correspondence: Panagiotis Georgiadis,
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7
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Waters MD, Warren S, Hughes C, Lewis P, Zhang F. Human genetic risk of treatment with antiviral nucleoside analog drugs that induce lethal mutagenesis: The special case of molnupiravir. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2022; 63:37-63. [PMID: 35023215 DOI: 10.1002/em.22471] [Citation(s) in RCA: 32] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Revised: 12/28/2021] [Accepted: 01/08/2022] [Indexed: 06/14/2023]
Abstract
This review considers antiviral nucleoside analog drugs, including ribavirin, favipiravir, and molnupiravir, which induce genome error catastrophe in SARS-CoV or SARS-CoV-2 via lethal mutagenesis as a mode of action. In vitro data indicate that molnupiravir may be 100 times more potent as an antiviral agent than ribavirin or favipiravir. Molnupiravir has recently demonstrated efficacy in a phase 3 clinical trial. Because of its anticipated global use, its relative potency, and the reported in vitro "host" cell mutagenicity of its active principle, β-d-N4-hydroxycytidine, we have reviewed the development of molnupiravir and its genotoxicity safety evaluation, as well as the genotoxicity profiles of three congeners, that is, ribavirin, favipiravir, and 5-(2-chloroethyl)-2'-deoxyuridine. We consider the potential genetic risks of molnupiravir on the basis of all available information and focus on the need for additional human genotoxicity data and follow-up in patients treated with molnupiravir and similar drugs. Such human data are especially relevant for antiviral NAs that have the potential of permanently modifying the genomes of treated patients and/or causing human teratogenicity or embryotoxicity. We conclude that the results of preclinical genotoxicity studies and phase 1 human clinical safety, tolerability, and pharmacokinetics are critical components of drug safety assessments and sentinels of unanticipated adverse health effects. We provide our rationale for performing more thorough genotoxicity testing prior to and within phase 1 clinical trials, including human PIG-A and error corrected next generation sequencing (duplex sequencing) studies in DNA and mitochondrial DNA of patients treated with antiviral NAs that induce genome error catastrophe via lethal mutagenesis.
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Affiliation(s)
- Michael D Waters
- Michael Waters Consulting USA, Hillsborough, North Carolina, USA
| | | | - Claude Hughes
- Duke University Medical Center, Durham, North Carolina, USA
| | | | - Fengyu Zhang
- Global Clinical and Translational Research Institute, Bethesda, Maryland, USA
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8
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Romanova EB, Ryabinina ES, Lyapkov SM. Body Size, Age, Phenetic, Morphophysiological, and Cytogenetic Characteristics of Pelophylax ridibundus (Amphibia, Ranidae) Populations Inhabiting Polluted Thermal Reservoirs of Kamchatka. BIOL BULL+ 2021. [DOI: 10.1134/s1062359021070256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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9
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Owen DR, Allerton CMN, Anderson AS, Aschenbrenner L, Avery M, Berritt S, Boras B, Cardin RD, Carlo A, Coffman KJ, Dantonio A, Di L, Eng H, Ferre R, Gajiwala KS, Gibson SA, Greasley SE, Hurst BL, Kadar EP, Kalgutkar AS, Lee JC, Lee J, Liu W, Mason SW, Noell S, Novak JJ, Obach RS, Ogilvie K, Patel NC, Pettersson M, Rai DK, Reese MR, Sammons MF, Sathish JG, Singh RSP, Steppan CM, Stewart AE, Tuttle JB, Updyke L, Verhoest PR, Wei L, Yang Q, Zhu Y. An oral SARS-CoV-2 M pro inhibitor clinical candidate for the treatment of COVID-19. Science 2021; 374:1586-1593. [PMID: 34726479 DOI: 10.1126/science.abl4784] [Citation(s) in RCA: 948] [Impact Index Per Article: 316.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
[Figure: see text].
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Affiliation(s)
- Dafydd R Owen
- Pfizer Worldwide Research, Development & Medical, Cambridge, MA 02139, USA
| | | | | | | | - Melissa Avery
- Pfizer Worldwide Research, Development & Medical; Groton, CT 06340, USA
| | - Simon Berritt
- Pfizer Worldwide Research, Development & Medical; Groton, CT 06340, USA
| | - Britton Boras
- Pfizer Worldwide Research, Development & Medical, La Jolla, CA 92121, USA
| | - Rhonda D Cardin
- Pfizer Worldwide Research, Development & Medical, Pearl River, NY 10965, USA
| | - Anthony Carlo
- Pfizer Worldwide Research, Development & Medical; Groton, CT 06340, USA
| | - Karen J Coffman
- Pfizer Worldwide Research, Development & Medical; Groton, CT 06340, USA
| | - Alyssa Dantonio
- Pfizer Worldwide Research, Development & Medical; Groton, CT 06340, USA
| | - Li Di
- Pfizer Worldwide Research, Development & Medical; Groton, CT 06340, USA
| | - Heather Eng
- Pfizer Worldwide Research, Development & Medical; Groton, CT 06340, USA
| | - RoseAnn Ferre
- Pfizer Worldwide Research, Development & Medical, La Jolla, CA 92121, USA
| | - Ketan S Gajiwala
- Pfizer Worldwide Research, Development & Medical, La Jolla, CA 92121, USA
| | - Scott A Gibson
- Institute for Antiviral Research, Department of Animal, Dairy, and Veterinary Sciences, Utah State University; Logan, UT 84322, USA
| | | | - Brett L Hurst
- Institute for Antiviral Research, Department of Animal, Dairy, and Veterinary Sciences, Utah State University; Logan, UT 84322, USA
| | - Eugene P Kadar
- Pfizer Worldwide Research, Development & Medical; Groton, CT 06340, USA
| | - Amit S Kalgutkar
- Pfizer Worldwide Research, Development & Medical, Cambridge, MA 02139, USA
| | - Jack C Lee
- Pfizer Worldwide Research, Development & Medical; Groton, CT 06340, USA
| | - Jisun Lee
- Pfizer Worldwide Research, Development & Medical; Groton, CT 06340, USA
| | - Wei Liu
- Pfizer Worldwide Research, Development & Medical, La Jolla, CA 92121, USA
| | - Stephen W Mason
- Pfizer Worldwide Research, Development & Medical, Pearl River, NY 10965, USA
| | - Stephen Noell
- Pfizer Worldwide Research, Development & Medical; Groton, CT 06340, USA
| | - Jonathan J Novak
- Pfizer Worldwide Research, Development & Medical; Groton, CT 06340, USA
| | - R Scott Obach
- Pfizer Worldwide Research, Development & Medical; Groton, CT 06340, USA
| | - Kevin Ogilvie
- Pfizer Worldwide Research, Development & Medical; Groton, CT 06340, USA
| | - Nandini C Patel
- Pfizer Worldwide Research, Development & Medical, Cambridge, MA 02139, USA
| | - Martin Pettersson
- Pfizer Worldwide Research, Development & Medical, Cambridge, MA 02139, USA
| | - Devendra K Rai
- Pfizer Worldwide Research, Development & Medical, Pearl River, NY 10965, USA
| | - Matthew R Reese
- Pfizer Worldwide Research, Development & Medical; Groton, CT 06340, USA
| | - Matthew F Sammons
- Pfizer Worldwide Research, Development & Medical, Cambridge, MA 02139, USA
| | - Jean G Sathish
- Pfizer Worldwide Research, Development & Medical, Pearl River, NY 10965, USA
| | | | - Claire M Steppan
- Pfizer Worldwide Research, Development & Medical; Groton, CT 06340, USA
| | - Al E Stewart
- Pfizer Worldwide Research, Development & Medical, La Jolla, CA 92121, USA
| | - Jamison B Tuttle
- Pfizer Worldwide Research, Development & Medical, Cambridge, MA 02139, USA
| | - Lawrence Updyke
- Pfizer Worldwide Research, Development & Medical, Cambridge, MA 02139, USA
| | - Patrick R Verhoest
- Pfizer Worldwide Research, Development & Medical, Cambridge, MA 02139, USA
| | - Liuqing Wei
- Pfizer Worldwide Research, Development & Medical; Groton, CT 06340, USA
| | - Qingyi Yang
- Pfizer Worldwide Research, Development & Medical, Cambridge, MA 02139, USA
| | - Yuao Zhu
- Pfizer Worldwide Research, Development & Medical, Pearl River, NY 10965, USA
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10
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Aguilera-Rodríguez FR, Zamora-Perez AL, Galván-Moreno CL, Gutiérrez-Hernández R, Reyes Estrada CA, Esparza-Ibarra EL, Lazalde-Ramos BP. Cytotoxic and Genotoxic Evaluation of the Aqueous and Hydroalcoholic Leaf and Bark Extracts of Crataegus oxyacantha in Murine Model. PLANTS (BASEL, SWITZERLAND) 2021; 10:plants10102217. [PMID: 34686027 PMCID: PMC8540136 DOI: 10.3390/plants10102217] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 10/02/2021] [Accepted: 10/03/2021] [Indexed: 05/13/2023]
Abstract
Crataegus oxyacantha has been mainly used in traditional medicine for the treatment of cardiovascular diseases. However, its safety profile has not been fully established, since only the genotoxic effects of C. oxyacantha fruit have been described. Therefore, the objective of this work was evaluating the cytotoxicity and genotoxicity of the aqueous and hydroalcoholic leaf and bark extracts of C. oxyacantha by means of the micronucleus test in a murine model. Doses of 2000, 1000, and 500 mg/kg of both extracts were administered orally for 5 days in mice of the Balb-C strain. Peripheral blood smears were performed at 0, 24, 48, 72, and 96 h after each administration. The number of polychromatic erythrocytes (PCEs), micronucleated polychromatic erythrocytes (MNPCEs), and micronucleated erythrocytes (MNEs) was determined at the different sampling times. Our results showed that the leaf and bark of C. oxyacantha increase the number of MNEs at the 2000 mg/kg dose, and only the aqueous leaf extract decreases the number of PCEs at the same dose. Therefore, the aqueous and hydroalcoholic leaf and bark extracts of C. oxyacantha showed genotoxic effects, and only the aqueous leaf extract exhibited cytotoxic effects.
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Affiliation(s)
- Fany Renata Aguilera-Rodríguez
- Maestría en Ciencia y Tecnología Química, Laboratorio de Etnofarmacología, Unidad Académica de Ciencias Químicas, Universidad Autónoma de Zacatecas, 98000 Zacatecas, Mexico; (F.R.A.-R.); (C.L.G.-M.)
| | - Ana Lourdes Zamora-Perez
- Instituto de Investigación en Odontología, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, 44100 Jalisco, Mexico;
| | - Clara Luz Galván-Moreno
- Maestría en Ciencia y Tecnología Química, Laboratorio de Etnofarmacología, Unidad Académica de Ciencias Químicas, Universidad Autónoma de Zacatecas, 98000 Zacatecas, Mexico; (F.R.A.-R.); (C.L.G.-M.)
| | - Rosalinda Gutiérrez-Hernández
- Programa de Licenciatura en Nutrición de la Unidad Académica de Enfermería, Universidad Autónoma de Zacatecas, 98000 Zacatecas, Mexico;
| | - Claudia Araceli Reyes Estrada
- Maestría en Ciencias de la Salud Unidad Académica de Medicina Human, Unidad Académica de Ciencias Biológicas, Universidad Autónoma de Zacatecas, 98000 Zacatecas, Mexico;
| | - Edgar L. Esparza-Ibarra
- Unidad Académica de Ciencias Químicas, Universidad Autónoma de Zacatecas, 98000 Zacatecas, Mexico;
| | - Blanca Patricia Lazalde-Ramos
- Maestría en Ciencia y Tecnología Química, Laboratorio de Etnofarmacología, Unidad Académica de Ciencias Químicas, Universidad Autónoma de Zacatecas, 98000 Zacatecas, Mexico; (F.R.A.-R.); (C.L.G.-M.)
- Correspondence: or ; Tel.: +52-492-1702977
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11
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More SJ, Bampidis V, Bragard C, Halldorsson TI, Hernández‐Jerez AF, Hougaard Bennekou S, Koutsoumanis K, Lambré C, Machera K, Naegeli H, Nielsen SS, Schlatter J, Schrenk D, Turck D, Younes M, Aquilina G, Bignami M, Bolognesi C, Crebelli R, Gürtler R, Marcon F, Nielsen E, Vleminckx C, Carfì M, Martino C, Maurici D, Parra Morte J, Rossi A, Benford D. Guidance on aneugenicity assessment. EFSA J 2021; 19:e06770. [PMID: 34386097 PMCID: PMC8340060 DOI: 10.2903/j.efsa.2021.6770] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
The EFSA Scientific Committee was asked to provide guidance on the most appropriate in vivo tests to follow up on positive in vitro results for aneugenicity, and on the approach to risk assessment for substances that are aneugenic but not clastogenic nor causing gene mutations. The Scientific Committee confirmed that the preferred approach is to perform an in vivo mammalian erythrocyte micronucleus test with a relevant route of administration. If this is positive, it demonstrates that the substance is aneugenic in vivo. A negative result with evidence that the bone marrow is exposed to the test substance supports a conclusion that aneugenic activity is not expressed in vivo. If there is no evidence of exposure to the bone marrow, a negative result is viewed as inconclusive and further studies are required. The liver micronucleus assay, even though not yet fully validated, can provide supporting information for substances that are aneugenic following metabolic activation. The gastrointestinal micronucleus test, conversely, to be further developed, may help to assess aneugenic potential at the initial site of contact for substances that are aneugenic in vitro without metabolic activation. Based on the evidence in relation to mechanisms of aneugenicity, the Scientific Committee concluded that, in principle, health-based guidance values can be established for substances that are aneugenic but not clastogenic nor causing gene mutations, provided that a comprehensive toxicological database is available. For situations in which the toxicological database is not sufficient to establish health-based guidance values, some approaches to risk assessment are proposed. The Scientific Committee recommends further development of the gastrointestinal micronucleus test, and research to improve the understanding of aneugenicity to support risk assessment.
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12
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Cruz RCR, Neto FR, Furtado RA, Souza LM, de Sousa FD, Ozelin SD, Bastos JK, Magalhães GM, Tavares DC, de Oliveira PF. Watermelon Reduces the Toxicity of Cisplatin Treatment in C57BL/6 Mice with Induced Melanoma. Nutr Cancer 2021; 74:1097-1105. [PMID: 34085572 DOI: 10.1080/01635581.2021.1918731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
An alternative to reduce the undesirable effects of antineoplastic agents has been the combination of classical treatments with nutritional strategies aimed at reducing systemic toxicity without decreasing the antitumor activity of already used drugs. Within this context, this study evaluated the possible reduction of toxicity when cisplatin treatment is combined with watermelon pulp juice supplementation in C57BL/6 mice with melanoma. Watermelon is a fruit rich in vitamins, minerals, proteins, lycopene, carotene, and xanthophylls, which has shown effectiveness in the treatment of cardiovascular diseases, weight loss, urinary infections, gout, hypertension, and mutagenicity. The following parameters were analyzed: animal survival, bone marrow genotoxicity, serum creatinine and urea, histopathological features of the tumor tissue, tumor weight and volume, and weight of non-tumor tissues (kidney, liver, spleen, heart, and lung). The results showed that watermelon had no antitumor effect but reduced the toxicity of cisplatin, as demonstrated by an increase in the number of bone marrow cells and a decrease in serum creatinine and urea levels. The data suggest that watermelon pulp juice can be an alternative for reducing the side effects of antineoplastic agents.
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Affiliation(s)
| | - Francisco Rinaldi Neto
- Universidade de Franca, Franca, São Paulo, Brazil.,Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo, Brazil
| | | | | | | | | | | | | | | | - Pollyanna Francielli de Oliveira
- Universidade de Franca, Franca, São Paulo, Brazil.,Instituto de Ciências da Natureza, Universidade Federal de Alfenas, Alfenas, Minas Gerais, Brazil
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13
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Solórzano-Meléndez A, Rodrigo-Alarcón R, Gómez-Meda BC, Zamora-Pérez AL, Ortiz-García RG, Bayardo-López LH, González-Virgen R, Gallegos-Arreola MP, Zúñiga-González GM. Micronucleated erythrocytes in peripheral blood from neonate rats fed by nursing mothers exposed to X-rays. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2021; 62:177-184. [PMID: 33496960 DOI: 10.1002/em.22426] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 01/20/2021] [Accepted: 01/22/2021] [Indexed: 06/12/2023]
Abstract
Most women with breast cancer can become pregnant and give birth while undergoing radiation therapy and breastfeeding is generally not contraindicated. The induction of long-lived reactive species in proteins, such as casein by X-ray radiation and DNA damage to unexposed organisms, has been shown when ingesting irradiated cheese. To determine whether exposing lactating rats to X-rays increases the number of micronucleated erythrocytes (MNEs) in peripheral blood of their unexposed or breastfeeding rat pups, 15 female Wistar rats were divided into three groups: Negative control; Experimental group exposed to X-rays, and group exposed to X-rays plus vitamin C. The mothers of groups 2 and 3 were irradiated for three consecutive days after giving birth, returning them to their respective cages each time to continue lactation. A blood sample was taken from the mothers and pups at 0, 24, and 48 hr. Blood smears were stained with acridine orange to analyze MNEs. In mother rats, the frequency of micronucleated polychromatic erythrocytes (MNPCEs) increased significantly at 24 and 48 hr in both study groups exposed to radiation. Likewise, in rat pups the MNPCE and MNE frequencies increased in both groups with radiation and radiation plus vitamin C at 24 and 48 hr, and a protection from vitamin C was observed. In conclusion, the genotoxic damage produced in rat pups that were lactated by mothers irradiated with X-rays is possibly due to the effect of long-lived reactive species that were formed in the breast milk of female Wistar rats during the irradiation process.
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Affiliation(s)
- Alejandro Solórzano-Meléndez
- Servicio de Radio-oncología, Centro Nacional de Radioneurocirugía, Unidad Médica de Alta Especialidad, Hospital de Especialidades, Centro Médico Nacional de Occidente, Instituto Mexicano del Seguro Social, Guadalajara, Jalisco, Mexico
| | - Rodolfo Rodrigo-Alarcón
- Servicio de Radio-oncología, Centro Nacional de Radioneurocirugía, Unidad Médica de Alta Especialidad, Hospital de Especialidades, Centro Médico Nacional de Occidente, Instituto Mexicano del Seguro Social, Guadalajara, Jalisco, Mexico
| | - Belinda C Gómez-Meda
- Instituto de Genética Humana "Dr. Enrique Corona Rivera", Departamento de Biología Molecular y Genómica, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara, Jalisco, Mexico
| | - Ana L Zamora-Pérez
- Instituto de Investigación en Odontología, Departamento de Clínicas Odontológicas Integrales, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara, Jalisco, Mexico
| | - Ramón G Ortiz-García
- Laboratorio de Mutagénesis, División de Medicina Molecular, Centro de Investigación Biomédica de Occidente, Instituto Mexicano del Seguro Social, Guadalajara, Jalisco, Mexico
- Doctorado en Genética Humana, Departamento de Biología Molecular y Genómica, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara, Jalisco, Mexico
| | - Luis H Bayardo-López
- Servicio de Radio-oncología, Centro Nacional de Radioneurocirugía, Unidad Médica de Alta Especialidad, Hospital de Especialidades, Centro Médico Nacional de Occidente, Instituto Mexicano del Seguro Social, Guadalajara, Jalisco, Mexico
| | - Roberto González-Virgen
- Servicio de Radio-oncología, Centro Nacional de Radioneurocirugía, Unidad Médica de Alta Especialidad, Hospital de Especialidades, Centro Médico Nacional de Occidente, Instituto Mexicano del Seguro Social, Guadalajara, Jalisco, Mexico
| | - Martha P Gallegos-Arreola
- Laboratorio de Genética Molecular, División de Genética, Centro de Investigación Biomédica de Occidente, Instituto Mexicano del Seguro Social, Guadalajara, Jalisco, Mexico
| | - Guillermo M Zúñiga-González
- Laboratorio de Mutagénesis, División de Medicina Molecular, Centro de Investigación Biomédica de Occidente, Instituto Mexicano del Seguro Social, Guadalajara, Jalisco, Mexico
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14
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Ware RE, Dertinger SD. Absence of hydroxyurea-induced mutational effects supports higher utilisation for the treatment of sickle cell anaemia. Br J Haematol 2021; 194:252-266. [PMID: 33570176 DOI: 10.1111/bjh.17323] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Accepted: 12/21/2020] [Indexed: 12/21/2022]
Abstract
Hydroxyurea (hydroxycarbamide) is approved for treating both children and adults with sickle cell anaemia (SCA). Fetal haemoglobin (HbF) induction is the primary treatment response, along with improved anaemia, reduced haemolysis, myelosuppression and decreased endothelial inflammation. Hydroxyurea has proven clinical efficacy for SCA - treatment significantly reduces disease manifestations and prolongs survival. Despite these recognised benefits, long-standing concerns regarding the risks of mutagenic and potentially carcinogenic drug exposure have hampered efforts for broad hydroxyurea use in SCA, although these are based largely on outdated experimental models and treatment experiences with myeloproliferative neoplasms. Consequently, many patients with SCA are not receiving this highly effective disease-modifying therapy. In this review, we describe the concept of genotoxicity and its laboratory measurements, summarise hydroxyurea-associated data from both preclinical and clinical studies, and discuss carcinogenic potential. The genotoxicity results clearly demonstrate that hydroxyurea does not directly bind DNA and is not mutagenic. Rather, its genotoxic effects are limited to indirect clastogenicity occurring in select cell types, and only when high dose and time thresholds are exceeded. This absence of mutagenic activity is consistent with the observed lack of any compelling carcinogenic potential. Since hydroxyurea therapy for SCA carries minimal carcinogenic risks, the current drug labelling should be modified accordingly, and prescribing practices should be broadened to allow better access and increased utilisation of this highly effective drug.
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Affiliation(s)
- Russell E Ware
- Division of Hematology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.,Global Health Center, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.,Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA
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15
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Rajamani K, Thirugnanasambandan SS, Natesan C, Subramaniam S, Thangavel B, Aravindan N. Squalene deters drivers of RCC disease progression beyond VHL status. Cell Biol Toxicol 2020; 37:611-631. [PMID: 33219891 DOI: 10.1007/s10565-020-09566-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Accepted: 10/26/2020] [Indexed: 12/12/2022]
Abstract
Identifying drug candidates to target cellular events/signaling that evades von Hippel-Lindau tumor suppressor (VHL) gene interaction is critical for the cure of renal cell carcinoma (RCC). Recently, we characterized a triterpene-squalene derived from marine brown alga. Herein, we investigated the potential of squalene in targeting HIF-signaling and other drivers of RCC progression. Squalene inhibited cell proliferation, induced cell dealth and reverted the cells' metastatic state (migration, clonal expansion) independent of their VHL status. Near-identical inhibition of HIF-1α and HIF-2α and the regulation of downstream targets in VHL wild type and mutant cell lines demonstrated squalene efficacy beyond VHL-HIF interaction. In a rat model of chemically induced RCC, squalene displayed chemopreventive capabilities by substantial reversal of lipid peroxidation, mitochondrial redox regulation, maintaining ∆ψm, inflammation [Akt, nuclear factor κB (NF-κB)], angiogenesis (VEGFα), metastasis [matrix metalloproteinase 2 (MMP-2)], and survival (Bax/Bcl2, cytochrome-c, Casp3). Squalene restored glutathione, glutathione reductase, glutathione-s-transferase, catalase, and superoxide dismutase and stabilized alkaline phosphatase, alkaline transaminase, and aspartate transaminase. The correlation of thiobarbituric acid reactive substance with VEGF/NF-κB and negative association of GSH with Casp3 show that squalene employs reduction in ROS regulation. Cytokinesis-block micronuclei (CBMN) assay in VHLwt/mut cells revealed both direct and bystander effects of squalene with increased micronucleus (MN) frequency. Clastogenicity analysis of rat bone marrow cells demonstrated an anti-clastogenic effect of squalene, with increased polychromatic erythrocytes (PCEs), decreased MNPCE,s and MN normochromatic erythrocytes. Squalene could effectively target HIF signaling that orchestrate RCC evolution. The efficacy of squalene is similar in VHLwt and VHLmut RCC cells, and hence, squalene could serve as a promising drug candidate for an RCC cure beyond VHL status and VHL-HIF interaction dependency. Summary: Squalene derived from marine brown algae displays strong anti-cancer (RCC) activity, functionally targeting HIF-signaling pathway, and affects various cellular process. The significance of squalene effect for RCC is highlighted by its efficiency beyond VHL status, designating itself a promising drug candidate. Graphical abstract.
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Affiliation(s)
- Karthikeyan Rajamani
- Centre of Advanced Study in Marine Biology, Annamalai University, Parangipettai, 608502, TN, India.
- Rajah Muthiah Medical College, Annamalai University, Annamalai Nagar, Chidambaram, 608002, TN, India.
- WHO Collaborating Center for Occupational and Environmental Health, ICMR Center for Air Quality, Climate and Health, Department of Environmental Health Engineering, Sri Ramachandra Institute of Higher Education and Research, Porur, Chennai, TN, 600116, India.
| | | | - Chidambaram Natesan
- Rajah Muthiah Medical College, Annamalai University, Annamalai Nagar, Chidambaram, 608002, TN, India
| | - Sethupathy Subramaniam
- Rajah Muthiah Medical College, Annamalai University, Annamalai Nagar, Chidambaram, 608002, TN, India
| | | | - Natarajan Aravindan
- Department of Radiation Oncology, University of Oklahoma Health Sciences Center, BMSB 737, 947 Stanton L. Young Boulevard, Oklahoma City, OK, 73104, USA.
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16
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Chen Y, Huo J, Liu Y, Zeng Z, Zhu X, Chen X, Wu R, Zhang L, Chen J. Development of a novel flow cytometry-based approach for reticulocytes micronucleus test in rat peripheral blood. J Appl Toxicol 2020; 41:595-606. [PMID: 33067908 DOI: 10.1002/jat.4068] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 08/25/2020] [Accepted: 08/25/2020] [Indexed: 12/14/2022]
Abstract
The micronucleus test (MNT) is the most widely applied short-term assay to detect clastogens or spindle disruptors. The use of flow cytometry (FCM) has been reported for micronucleated erythrocytes scoring in peripheral blood. The aim of this study was to develop a novel and practical protocol for MNT in rat peripheral blood by FCM, with the method validation. CD71-fluorescein isothiocyanate and DRAQ5 were adopted for the fluorescent staining of proteins and DNA, respectively, to detect micronuclei. To validate the method, groups of male Sprague-Dawley rats (five per group) received two oral gavage doses at 0 and 24 h of six chemicals (four positive mutagens: ethyl methanesulphonate [EMS], cyclophosphamide [CP], colchicine [COL], and ethyl nitrosourea [ENU]; two nongenotoxic chemicals: sodium saccharin and eugenol). Blood samples were collected from the tail vein before and on the five continuous days after treatments; all of which were analyzed for micronuclei presence by both the manual (Giemsa staining) and FCM methods. The FCM-based method consistently demonstrated highly sensitive responses for micronucleus detection at all concentrations and all time points for EMS, CP, COL, and ENU. Sodium saccharin and eugenol could be identified as negative in this protocol. Results obtained with the FCM-based method correlated well with the micronucleus frequencies (r = 0.659-0.952), and the proportion of immature erythrocytes (r = 0.915-0.981) tested by Giemsa staining. The method reported here, with easy operation, low background, and requirement for a regular FCM, could be an efficient system for micronucleus scoring.
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Affiliation(s)
- Yiyi Chen
- Department of Nutrition, Food Safety and Toxicology, West China School of Public Health, Sichuan University, Chengdu, China.,Food Safety Monitoring and Risk Assessment Key Laboratory of Sichuan Province, Sichuan University, Chengdu, China
| | - Jiao Huo
- Department of Nutrition, Food Safety and Toxicology, West China School of Public Health, Sichuan University, Chengdu, China.,Department of Nutrition and Food Safety, Chongqing Center for Disease Control and Prevention, Chongqing, China
| | - Yunjie Liu
- Graduate Department, West China School of Public Health, Sichuan University, Chengdu, China
| | - Zhu Zeng
- Department of Nutrition, Food Safety and Toxicology, West China School of Public Health, Sichuan University, Chengdu, China.,Food Safety Monitoring and Risk Assessment Key Laboratory of Sichuan Province, Sichuan University, Chengdu, China
| | - Xuejiao Zhu
- Department of Nutrition, Food Safety and Toxicology, West China School of Public Health, Sichuan University, Chengdu, China.,Food Safety Monitoring and Risk Assessment Key Laboratory of Sichuan Province, Sichuan University, Chengdu, China
| | - Xuxi Chen
- Department of Nutrition, Food Safety and Toxicology, West China School of Public Health, Sichuan University, Chengdu, China.,Food Safety Monitoring and Risk Assessment Key Laboratory of Sichuan Province, Sichuan University, Chengdu, China
| | - Rui Wu
- Department of Nutrition, Food Safety and Toxicology, West China School of Public Health, Sichuan University, Chengdu, China.,Food Safety Monitoring and Risk Assessment Key Laboratory of Sichuan Province, Sichuan University, Chengdu, China
| | - Lishi Zhang
- Department of Nutrition, Food Safety and Toxicology, West China School of Public Health, Sichuan University, Chengdu, China.,Food Safety Monitoring and Risk Assessment Key Laboratory of Sichuan Province, Sichuan University, Chengdu, China
| | - Jinyao Chen
- Department of Nutrition, Food Safety and Toxicology, West China School of Public Health, Sichuan University, Chengdu, China.,Food Safety Monitoring and Risk Assessment Key Laboratory of Sichuan Province, Sichuan University, Chengdu, China
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17
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Torous DK, Avlasevich SL, Khattab MG, Baig A, Saubermann LJ, Chen Y, Bemis JC, Lovell DP, Walker VE, MacGregor JT, Dertinger SD. Human blood PIG-A mutation and micronucleated reticulocyte flow cytometric assays: Method optimization and evaluation of intra- and inter-subject variation. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2020; 61:807-819. [PMID: 32572998 PMCID: PMC8582004 DOI: 10.1002/em.22393] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 06/17/2020] [Accepted: 06/18/2020] [Indexed: 05/05/2023]
Abstract
We previously described flow cytometry-based methods for scoring the incidence of micronucleated reticulocytes (MN-RET) and PIG-A mutant phenotype reticulocytes (MUT RET) in rodent and human blood samples. The current report describes important methodological improvements for human blood analyses, including immunomagnetic enrichment of CD71-positive reticulocytes prior to MN-RET scoring, and procedures for storing frozen blood for later PIG-A analysis. Technical replicate variability in MN-RET and MUT RET frequencies based on blood specimens from 14 subjects, intra-subject variability based on serial blood draws from 6 subjects, and inter-subject variation based on up to 344 subjects age 0 to 73 years were quantified. Inter-subject variation explained most of the variability observed for both endpoints (≥77%), with much lower intra-subject and technical replicate variability. The relatively large degree of inter-subject variation is apparent from mean and standard deviation values for MN-RET (0.15 ± 0.10%) and MUT RET (4.7 ± 5.0 per million, after omission of two extreme outliers). The influences of age and sex on inter-subject variation were investigated, and neither factor affected MN-RET whereas both influenced MUT RET frequency. The lowest MUT RET values were observed for subjects <11 years old, and males had moderately higher frequencies than females. These results indicate that MN-RET and MUT RET are automation-compatible biomarkers of genotoxicity that bridge species of toxicological interest to include human populations. These data will be useful for appropriately designing future human studies that include these biomarkers of genotoxicity, and highlight the need for additional work aimed at identifying the sources of inter-individual variability reported herein.
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Affiliation(s)
| | | | - Mona G. Khattab
- Department of Pediatrics, Baylor College of Medicine, Texas Children’s Hospital, Houston, Texas
| | - Ayesha Baig
- Department of Pediatrics, University of Rochester Medical Center, Rochester, New York
| | | | - Yuhchyau Chen
- Department of Radiation Oncology, University of Rochester Medical Center, Rochester, New York
| | | | | | - Vernon E. Walker
- Department of Pathology and Laboratory Medicine, University of Vermont, Burlington, Vermont
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18
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Montero-Montoya RD, López-Vargas R, Méndez-Serrano A, Galicia-Alonso I, García-Vargas G, Serrano-García L, Beltrán-Portugal R, Rosado-Zaidi S, Albores-Medina A, Oropeza-Hernández L, Hernández-Cadena L, Mercado-Calderón F, Alvarado-Toledo E, Herrera-Morales S, Arellano-Aguilar O. Increased micronucleus frequencies in reticulocytes of children exposed to industrial pollution: oxidative stress and the OGG1 S326C polymorphism. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2020; 853:503170. [DOI: 10.1016/j.mrgentox.2020.503170] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 03/06/2020] [Accepted: 03/08/2020] [Indexed: 01/16/2023]
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19
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Pressete CG, Giannini LSV, Paula DAC, do Carmo MAV, Assis DM, Santos MFC, Machado JDC, Marques MJ, Soares MG, Azevedo L. Sclerotinia Sclerotiorum(White Mold): Cytotoxic, Mutagenic, and Antimalarial EffectsIn VivoandIn Vitro. J Food Sci 2019; 84:3866-3875. [DOI: 10.1111/1750-3841.14910] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 09/11/2019] [Accepted: 10/05/2019] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | | | | | | | | | - Marcos José Marques
- Federal Univ. of AlfenasInst. of Biomedical Sciences Alfenas Minas Gerais Brazil
| | | | - Luciana Azevedo
- Nutrition FacultyFederal Univ. of Alfenas Alfenas Minas Gerais Brazil
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20
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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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21
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Evaluation of a 28-day repeated-dose micronucleus test in rat glandular stomach, colon, and liver using gastrointestinal tract-targeted genotoxic-carcinogens and non-carcinogens. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2019; 844:62-68. [DOI: 10.1016/j.mrgentox.2019.05.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Revised: 05/17/2019] [Accepted: 05/17/2019] [Indexed: 11/19/2022]
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22
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Nallanthighal S, Reliene R. Evaluation of Genotoxicity of Nanoparticles in Mouse Models. Methods Mol Biol 2019; 1894:301-312. [PMID: 30547468 DOI: 10.1007/978-1-4939-8916-4_17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Owing to new and unique properties, engineered nanoparticles (NPs) likely pose different risks than their constituent chemicals and these risks need to be understood. In particular, it is important to assess genotoxicity, since genotoxicity is a precursor to carcinogenicity. Here we describe a battery of tests for the assessment of genotoxicity of NPs in vivo in mice. Mice can be exposed to NPs for various exposure durations and by any route of exposure, provided NPs are absorbed into the systemic blood circulation. The testing battery measures three well-established markers of DNA damage: oxidative DNA damage, double strand breaks (DSBs) and chromosomal damage. These markers are measured in peripheral blood cells by microscopic techniques. 8-oxo-7,8-dihydro-2-deoxyguanine (8-oxoG), indicative of oxidative DNA damage, and phosphorylated histone 2AX (γ-H2AX) foci, indicative of DSBs, are determined in white blood cells by immunofluorescence. Micronuclei, indicative of chromosomal damage, are examined in erythrocytes on Giemsa-stained peripheral blood smears. This testing battery can be easily integrated in general toxicology studies or studies examining carcinogenic potential of NPs.
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Affiliation(s)
- Sameera Nallanthighal
- Cancer Research Center, University at Albany, State University of New York, Rensselaer, NY, USA.,Department of Biomedical Sciences, University at Albany, State University of New York, Albany, NY, USA
| | - Ramune Reliene
- Cancer Research Center, University at Albany, State University of New York, Rensselaer, NY, USA. .,Department of Environmental Health Sciences, University at Albany, State University of New York, Albany, NY, USA.
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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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Carnizello AP, Alves JM, Pereira DE, Campos JCL, Barbosa MIF, Batista AA, Tavares DC. Study of the cytotoxic and genotoxic potential of the carbonyl ruthenium(II) compound,
ct‐
[RuCl(CO)(dppb)(bipy)]PF
6
[dppb = 1,4‐bis(diphenylphosphino)butane and bipy = 2,2′‐bipyridine], by in vitro and in vivo assays. J Appl Toxicol 2018; 39:630-638. [DOI: 10.1002/jat.3753] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Revised: 09/24/2018] [Accepted: 10/15/2018] [Indexed: 12/31/2022]
Affiliation(s)
- Andréa P. Carnizello
- Departamento de QuímicaUniversidade Federal de São Carlos CP 676, CEP 13565‐905 São Carlos SP Brazil
- Laboratório de MutagêneseUniversidade de Franca Pq. Universitario, CEP 14404‐600 Franca SP Brazil
| | - Jacqueline M. Alves
- Laboratório de MutagêneseUniversidade de Franca Pq. Universitario, CEP 14404‐600 Franca SP Brazil
| | - Daiane E. Pereira
- Laboratório de MutagêneseUniversidade de Franca Pq. Universitario, CEP 14404‐600 Franca SP Brazil
| | - Jacqueline C. L. Campos
- Laboratório de MutagêneseUniversidade de Franca Pq. Universitario, CEP 14404‐600 Franca SP Brazil
| | - Marília I. F. Barbosa
- Departamento de QuímicaUniversidade Federal de São Carlos CP 676, CEP 13565‐905 São Carlos SP Brazil
| | - Alzir A. Batista
- Departamento de QuímicaUniversidade Federal de São Carlos CP 676, CEP 13565‐905 São Carlos SP Brazil
| | - Denise C. Tavares
- Laboratório de MutagêneseUniversidade de Franca Pq. Universitario, CEP 14404‐600 Franca SP Brazil
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Russo A, Cordelli E, Salvitti T, Palumbo E, Pacchierotti F. Rad54/Rad54B deficiency is associated to increased chromosome breakage in mouse spermatocytes. Mutagenesis 2018; 33:323-332. [DOI: 10.1093/mutage/gey027] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Accepted: 08/17/2018] [Indexed: 01/15/2023] Open
Affiliation(s)
- Antonella Russo
- Department of Molecular Medicine, University of Padova, Padova, Italy
| | - Eugenia Cordelli
- Laboratory of Biosafety and Risk Assessment, ENEA CR Casaccia, Rome, Italy
| | - Tullia Salvitti
- Laboratory of Biosafety and Risk Assessment, ENEA CR Casaccia, Rome, Italy
| | - Elisa Palumbo
- Department of Molecular Medicine, University of Padova, Padova, Italy
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Roch-Lefèvre S, Grégoire E, Martin-Bodiot C, Flegal M, Fréneau A, Blimkie M, Bannister L, Wyatt H, Barquinero JF, Roy L, Benadjaoud M, Priest N, Jourdain JR, Klokov D. Cytogenetic damage analysis in mice chronically exposed to low-dose internal tritium beta-particle radiation. Oncotarget 2018; 9:27397-27411. [PMID: 29937993 PMCID: PMC6007944 DOI: 10.18632/oncotarget.25282] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2017] [Accepted: 03/23/2018] [Indexed: 12/13/2022] Open
Abstract
The aim of this study was to carry out a comprehensive examination of potential genotoxic effects of low doses of tritium delivered chronically to mice and to compare these effects to the ones resulting from equivalent doses of gamma-irradiation. Mice were chronically exposed for one or eight months to either tritiated water (HTO) or organically bound tritium (OBT) in drinking water at concentrations of 10 kBq/L, 1 MBq/L or 20 MBq/L. Dose rates of internal β-particle resulting from such tritium treatments were calculated and matching external gamma-exposures were carried out. We measured cytogenetic damage in bone marrow and in peripheral blood lymphocytes (PBLs) and the cumulative tritium doses (0.009 - 181 mGy) were used to evaluate the dose-response of OBT in PBLs, as well as its relative biological effectiveness (RBE). Neither tritium, nor gamma exposures produced genotoxic effects in bone marrow. However, significant increases in chromosome damage rates in PBLs were found as a result of chronic OBT exposures at 1 and 20 M Bq/L, but not at 10 kBq/L. When compared to an external acute gamma-exposure ex vivo, the RBE of OBT for chromosome aberrations induction was evaluated to be significantly higher than 1 at cumulative tritium doses below 10 mGy. Although found non-existent at 10 kBq/L (the WHO limit), the genotoxic potential of low doses of tritium (>10 kBq/L), mainly OBT, may be higher than currently assumed.
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Affiliation(s)
- Sandrine Roch-Lefèvre
- Institut de Radioprotection et de Sûreté Nucléaire, IRSN, Pôle Santé et Environnement, Direction de la Santé, Fontenay-aux-Roses, France
| | - Eric Grégoire
- Institut de Radioprotection et de Sûreté Nucléaire, IRSN, Pôle Santé et Environnement, Direction de la Santé, Fontenay-aux-Roses, France
| | - Cécile Martin-Bodiot
- Institut de Radioprotection et de Sûreté Nucléaire, IRSN, Pôle Santé et Environnement, Direction de la Santé, Fontenay-aux-Roses, France
| | - Matthew Flegal
- Radiobiology and Health, Canadian Nuclear Laboratories, Chalk River, Ontario, Canada
| | - Amélie Fréneau
- Institut de Radioprotection et de Sûreté Nucléaire, IRSN, Pôle Santé et Environnement, Direction de la Santé, Fontenay-aux-Roses, France
| | - Melinda Blimkie
- Radiobiology and Health, Canadian Nuclear Laboratories, Chalk River, Ontario, Canada
| | - Laura Bannister
- Radiobiology and Health, Canadian Nuclear Laboratories, Chalk River, Ontario, Canada
| | - Heather Wyatt
- Radiobiology and Health, Canadian Nuclear Laboratories, Chalk River, Ontario, Canada
| | - Joan-Francesc Barquinero
- Present address at: Autonomous University of Barcelona, Faculty of Biosciences, Cerdanyola del Vallès, Spain
| | - Laurence Roy
- Institut de Radioprotection et de Sûreté Nucléaire, IRSN, Pôle Santé et Environnement, Direction de la Santé, Fontenay-aux-Roses, France
| | - Mohamed Benadjaoud
- Institut de Radioprotection et de Sûreté Nucléaire, IRSN, Pôle Santé et Environnement, Direction de la Santé, Fontenay-aux-Roses, France
| | - Nick Priest
- Radiobiology and Health, Canadian Nuclear Laboratories, Chalk River, Ontario, Canada
| | - Jean-René Jourdain
- Institut de Radioprotection et de Sûreté Nucléaire, IRSN, Direction des Affaires Internationales, Fontenay-aux-Roses, France
| | - Dmitry Klokov
- Radiobiology and Health, Canadian Nuclear Laboratories, Chalk River, Ontario, Canada
- Department of Biochemistrty, Microbiology and Immunology, University of Ottawa, Ottawa, Ontario, Canada
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Venancio VP, Almeida MR, Antunes LMG. Cocoplum ( Chrysobalanus icaco L.) decreases doxorubicin-induced DNA damage and downregulates Gadd45a , Il-1β , and Tnf-α in vivo. Food Res Int 2018; 105:996-1002. [DOI: 10.1016/j.foodres.2017.12.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Revised: 12/01/2017] [Accepted: 12/02/2017] [Indexed: 01/03/2023]
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Alarcón-Herrera N, Flores-Maya S, Bellido B, García-Bores AM, Mendoza E, Ávila-Acevedo G, Hernández-Echeagaray E. Protective effects of chlorogenic acid in 3-nitropropionic acid induced toxicity and genotoxicity. Food Chem Toxicol 2017; 109:1018-1025. [DOI: 10.1016/j.fct.2017.04.048] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Revised: 04/29/2017] [Accepted: 04/30/2017] [Indexed: 01/28/2023]
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Nallanthighal S, Chan C, Murray TM, Mosier AP, Cady NC, Reliene R. Differential effects of silver nanoparticles on DNA damage and DNA repair gene expression in Ogg1-deficient and wild type mice. Nanotoxicology 2017; 11:996-1011. [PMID: 29046123 DOI: 10.1080/17435390.2017.1388863] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Due to extensive use in consumer goods, it is important to understand the genotoxicity of silver nanoparticles (AgNPs) and identify susceptible populations. 8-Oxoguanine DNA glycosylase 1 (OGG1) excises 8-oxo-7,8-dihydro-2-deoxyguanine (8-oxoG), a pro-mutagenic lesion induced by oxidative stress. To understand whether defects in OGG1 is a possible genetic factor increasing an individual's susceptibly to AgNPs, we determined DNA damage, genome rearrangements, and expression of DNA repair genes in Ogg1-deficient and wild type mice exposed orally to 4 mg/kg of citrate-coated AgNPs over a period of 7 d. DNA damage was examined at 3 and 7 d of exposure and 7 and 14 d post-exposure. AgNPs induced 8-oxoG, double strand breaks (DSBs), chromosomal damage, and DNA deletions in both genotypes. However, 8-oxoG was induced earlier in Ogg1-deficient mice and 8-oxoG levels were higher after 7-d treatment and persisted longer after exposure termination. AgNPs downregulated DNA glycosylases Ogg1, Neil1, and Neil2 in wild type mice, but upregulated Myh, Neil1, and Neil2 glycosylases in Ogg1-deficient mice. Neil1 and Neil2 can repair 8-oxoG. Thus, AgNP-mediated downregulation of DNA glycosylases in wild type mice may contribute to genotoxicity, while upregulation thereof in Ogg1-deficient mice could serve as an adaptive response to AgNP-induced DNA damage. However, our data show that Ogg1 is indispensable for the efficient repair of AgNP-induced damage. In summary, citrate-coated AgNPs are genotoxic in both genotypes and Ogg1 deficiency exacerbates the effect. These data suggest that humans with genetic polymorphisms and mutations in OGG1 may have increased susceptibility to AgNP-mediated DNA damage.
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Affiliation(s)
- Sameera Nallanthighal
- a Cancer Research Center , University at Albany, State University of New York , Rensselaer , NY , USA.,b Department of Biomedical Sciences , University at Albany, State University of New York , Albany , NY , USA
| | - Cadia Chan
- a Cancer Research Center , University at Albany, State University of New York , Rensselaer , NY , USA.,c Department of Biomedical Sciences , Queen's University , Kingston , ON , Canada
| | - Thomas M Murray
- d Colleges of Nanoscale Sciences and Engineering , SUNY Polytechnic Institute , Albany , NY , USA
| | - Aaron P Mosier
- d Colleges of Nanoscale Sciences and Engineering , SUNY Polytechnic Institute , Albany , NY , USA
| | - Nathaniel C Cady
- d Colleges of Nanoscale Sciences and Engineering , SUNY Polytechnic Institute , Albany , NY , USA
| | - Ramune Reliene
- a Cancer Research Center , University at Albany, State University of New York , Rensselaer , NY , USA.,e Department of Environmental Health Sciences , University at Albany, State University of New York , Albany , NY , USA
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Tariba Lovaković B, Pizent A, Kašuba V, Kopjar N, Micek V, Mendaš G, Dvoršćak M, Mikolić A, Milić M, Žunec S, Lucić Vrdoljak A, Želježić D. Effects of sub-chronic exposure to terbuthylazine on DNA damage, oxidative stress and parent compound/metabolite levels in adult male rats. Food Chem Toxicol 2017; 108:93-103. [DOI: 10.1016/j.fct.2017.07.046] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Revised: 07/01/2017] [Accepted: 07/21/2017] [Indexed: 12/06/2022]
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31
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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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32
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Araujo-Espino DI, Zamora-Perez AL, Zúñiga-González GM, Gutiérrez-Hernández R, Morales-Velazquez G, Lazalde-Ramos BP. Genotoxic and cytotoxic evaluation of Jatropha dioica Sessé ex Cerv. by the micronucleus test in mouse peripheral blood. Regul Toxicol Pharmacol 2017; 86:260-264. [PMID: 28342845 DOI: 10.1016/j.yrtph.2017.03.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Revised: 03/16/2017] [Accepted: 03/19/2017] [Indexed: 10/19/2022]
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Barth A, Brucker N, Moro AM, Nascimento S, Goethel G, Souto C, Fracasso R, Sauer E, Altknecht L, da Costa B, Duarte M, Menezes CB, Tasca T, Arbo MD, Garcia SC. Association between inflammation processes, DNA damage, and exposure to environmental pollutants. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:353-362. [PMID: 27718115 DOI: 10.1007/s11356-016-7772-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Accepted: 09/22/2016] [Indexed: 06/06/2023]
Abstract
Environmental exposure to pollutants, especially polycyclic aromatic hydrocarbons (PAHs), could lead to carcinogenesis development. However, there is a gap on the mechanisms involved in this effect. Therefore, the aim of this study was to investigate the potential relationship between exposure to environmental air pollution and inflammation process in DNA damage in taxi drivers. This study included 45 taxi drivers and 40 controls; non-smokers composed both groups. Biological monitoring was performed through quantification of urinary 1-hydroxypyrene (1-OHP). ICAM-1 (CD54) expression, NTPDase activity, inflammatory cytokine (IL-1β, IL-6, IL-10, TNF-α and IFN-γ) levels, and comet and micronucleus assays were evaluated. The results demonstrated that 1-OHP levels, ICAM-1 expression, NTPDase activity, and DNA damage biomarkers (% tail DNA and micronucleus frequency) were increased in taxi drivers compared to the control group (p < 0.01). Moreover, significant associations were found between 1-OHP levels and ICAM-1 expression, % tail DNA, and micronucleus frequency (p < 0.05). Besides, pro-inflammatory cytokine levels were positively correlated to % tail DNA and micronucleus frequency (p < 0.001). Our findings suggest an important association between environmental exposure to air pollution with increase of ICAM-1 expression and NTPDase activity in taxi drivers. Additionally, the multiple regression linear-analysis demonstrated association between IL-6 and DNA damage. Thus, the present study has provided important evidence that, in addition to environmental exposure to air pollutants, the inflammation process may contribute to DNA damage.
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Affiliation(s)
- Anelise Barth
- Laboratory of Toxicology (LATOX), Department of Analysis, Faculty of Pharmacy, Federal University of Rio Grande do Sul, Avenida Ipiranga 2752, Santa Cecília, Porto Alegre, RS, CEP.: 90610-000, Brazil
| | - Natália Brucker
- Laboratory of Toxicology (LATOX), Department of Analysis, Faculty of Pharmacy, Federal University of Rio Grande do Sul, Avenida Ipiranga 2752, Santa Cecília, Porto Alegre, RS, CEP.: 90610-000, Brazil
| | - Angela M Moro
- Laboratory of Toxicology (LATOX), Department of Analysis, Faculty of Pharmacy, Federal University of Rio Grande do Sul, Avenida Ipiranga 2752, Santa Cecília, Porto Alegre, RS, CEP.: 90610-000, Brazil
| | - Sabrina Nascimento
- Laboratory of Toxicology (LATOX), Department of Analysis, Faculty of Pharmacy, Federal University of Rio Grande do Sul, Avenida Ipiranga 2752, Santa Cecília, Porto Alegre, RS, CEP.: 90610-000, Brazil
- Post-graduate Program in Pharmaceutical Sciences, Faculty of Pharmacy, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Gabriela Goethel
- Laboratory of Toxicology (LATOX), Department of Analysis, Faculty of Pharmacy, Federal University of Rio Grande do Sul, Avenida Ipiranga 2752, Santa Cecília, Porto Alegre, RS, CEP.: 90610-000, Brazil
- Post-graduate Program in Pharmaceutical Sciences, Faculty of Pharmacy, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Caroline Souto
- Laboratory of Toxicology (LATOX), Department of Analysis, Faculty of Pharmacy, Federal University of Rio Grande do Sul, Avenida Ipiranga 2752, Santa Cecília, Porto Alegre, RS, CEP.: 90610-000, Brazil
| | - Rafael Fracasso
- Laboratory of Toxicology (LATOX), Department of Analysis, Faculty of Pharmacy, Federal University of Rio Grande do Sul, Avenida Ipiranga 2752, Santa Cecília, Porto Alegre, RS, CEP.: 90610-000, Brazil
| | - Elisa Sauer
- Laboratory of Toxicology (LATOX), Department of Analysis, Faculty of Pharmacy, Federal University of Rio Grande do Sul, Avenida Ipiranga 2752, Santa Cecília, Porto Alegre, RS, CEP.: 90610-000, Brazil
- Post-graduate Program in Pharmaceutical Sciences, Faculty of Pharmacy, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Louise Altknecht
- Laboratory of Toxicology (LATOX), Department of Analysis, Faculty of Pharmacy, Federal University of Rio Grande do Sul, Avenida Ipiranga 2752, Santa Cecília, Porto Alegre, RS, CEP.: 90610-000, Brazil
| | - Bárbara da Costa
- Laboratory of Toxicology (LATOX), Department of Analysis, Faculty of Pharmacy, Federal University of Rio Grande do Sul, Avenida Ipiranga 2752, Santa Cecília, Porto Alegre, RS, CEP.: 90610-000, Brazil
| | - Marta Duarte
- Department of Health Sciences, Lutheran University of Brazil, Santa Maria, RS, Brazil
| | - Camila B Menezes
- Post-graduate Program in Pharmaceutical Sciences, Faculty of Pharmacy, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
- Laboratory of Research in Parasitology, Department of Analysis, Faculty of Pharmacy, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Tiana Tasca
- Post-graduate Program in Pharmaceutical Sciences, Faculty of Pharmacy, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
- Laboratory of Research in Parasitology, Department of Analysis, Faculty of Pharmacy, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Marcelo D Arbo
- Laboratory of Toxicology (LATOX), Department of Analysis, Faculty of Pharmacy, Federal University of Rio Grande do Sul, Avenida Ipiranga 2752, Santa Cecília, Porto Alegre, RS, CEP.: 90610-000, Brazil
- Post-graduate Program in Pharmaceutical Sciences, Faculty of Pharmacy, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Solange Cristina Garcia
- Laboratory of Toxicology (LATOX), Department of Analysis, Faculty of Pharmacy, Federal University of Rio Grande do Sul, Avenida Ipiranga 2752, Santa Cecília, Porto Alegre, RS, CEP.: 90610-000, Brazil.
- Post-graduate Program in Pharmaceutical Sciences, Faculty of Pharmacy, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil.
- Institute of Cardiology, University Cardiology Foundation, Porto Alegre, RS, Brazil.
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Nallanthighal S, Chan C, Bharali DJ, Mousa SA, Vásquez E, Reliene R. Particle coatings but not silver ions mediate genotoxicity of ingested silver nanoparticles in a mouse model. NANOIMPACT 2017; 5:92-100. [PMID: 28944309 PMCID: PMC5607010 DOI: 10.1016/j.impact.2017.01.003] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Incorporation of silver nanoparticles (AgNPs) in toothpaste, food containers, dietary supplements and other consumer products can result in oral exposure to AgNPs and/or silver ions (Ag+) released from the surface of AgNPs. To examine whether ingestion of AgNPs or Ag+ results in genotoxic damage and whether AgNP coatings modulate the effect, we exposed mice orally to 20 nm citrate-coated AgNPs, polyvinylpyrrolidone (PVP)-coated AgNPs, silver acetate or respective vehicles at a 4 mg/kg dose (equivalent to 800x the EPA reference dose for Ag) for 7 days. Genotoxicity was examined in the systemic circulation and bone marrow at 1, 7, and 14 days post-exposure. We found that citrate-coated AgNPs induced chromosomal damage in bone marrow and oxidative DNA damage and double strand breaks in peripheral blood. These damages persisted for at least 14 days after exposure termination. Because oxidative DNA damage and strand breaks are repaired rapidly, their presence after exposure cessation indicates that citrate-coated AgNPs persist in the body. In contrast, PVP-coated AgNPs and silver acetate did not induce DNA or chromosomal damage at any time point measured. To determine whether coating-dependent genotoxicity is related to different AgNP changes in the gastrointestinal tract, we examined AgNP behavior and fate in an in vitro gastrointestinal digestion model using UV-visible spectroscopy and DLS. Citrate-coated AgNPs were more susceptible to agglomeration than PVP-coated AgNPs in digestive juices with or without proteins. In summary, AgNPs but not Ag+ are genotoxic following oral ingestion. Nanoparticle coatings modulate gastrointestinal transformation and genotoxicity of AgNPs, where higher agglomeration of AgNPs in gastrointestinal juices is associated with higher genotoxicity in tissues. Since genotoxicity is a strong indicator of cancer risk, further long-term studies focusing on cancer are warranted.
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Affiliation(s)
- Sameera Nallanthighal
- Cancer Research Center, University at Albany, State University of New York, Rensselaer, NY, United States
- Department of Biomedical Sciences, University at Albany, State University of New York, Albany, NY, United States
| | - Cadia Chan
- Cancer Research Center, University at Albany, State University of New York, Rensselaer, NY, United States
- Department of Biomedical Sciences, Queen's University, Kingston, ON, Canada
| | - Dhruba J. Bharali
- Pharmaceutical Research Institute, Albany College of Pharmacy and Health Sciences, Albany, NY, United States
| | - Shaker A. Mousa
- Pharmaceutical Research Institute, Albany College of Pharmacy and Health Sciences, Albany, NY, United States
| | - Elizabeth Vásquez
- Department of Epidemiology and Biostatistics, University at Albany, State University of New York, Albany, NY, United States
| | - Ramune Reliene
- Cancer Research Center, University at Albany, State University of New York, Rensselaer, NY, United States
- Department of Environmental Health Sciences, University at Albany, State University of New York, Albany, NY, United States
- Corresponding author: Ramune Reliene, , 1 Discovery Drive, Cancer Research Center Rm. 304, Rensselaer, NY 12144. Phone: (518)-591-7152, Fax: (518)-591-7201
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Micronucleated Erythrocytes in Peripheral Blood from Neonate Rats Exposed by Breastfeeding to Cyclophosphamide, Colchicine, or Cytosine-Arabinoside. BIOMED RESEARCH INTERNATIONAL 2016; 2016:9161648. [PMID: 28018917 PMCID: PMC5149595 DOI: 10.1155/2016/9161648] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Revised: 10/31/2016] [Accepted: 11/03/2016] [Indexed: 01/16/2023]
Abstract
Genotoxic exposure to chemical substances is common, and nursing mothers could transmit harmful substances or their metabolites to their offspring through breast milk. We explored the possibility of determining genotoxic effects in the erythrocytes of breastfeeding rat pups whose mothers received a genotoxic compound while nursing. Ten groups of female rats and five pups per dam were studied. The control group received sterile water, and the experimental groups received one of three different doses of cyclophosphamide, colchicine, or cytosine-arabinoside. Blood smears were prepared from samples taken from each dam and pup every 24 h for six days. There were increased numbers of micronucleated erythrocytes (MNEs) and micronucleated polychromatic erythrocytes (MNPCEs) in the samples from pups in the experimental groups (P < 0.02) and increased MNPCE frequencies in the samples from the dams (P < 0.05). These results demonstrate the vertical transmission of the genotoxic effect of the compounds tested. In conclusion, assessing MNEs in breastfeeding neonate rats to assess DNA damage may be a useful approach for identifying genotoxic compounds and/or cytotoxic effects. This strategy could help in screening for therapeutic approaches that are genotoxic during the lactation stage and these assessments might also be helpful for developing preventive strategies to counteract harmful effects.
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Chemopreventive effect and angiogenic activity of punicalagin isolated from leaves of Lafoensia pacari A. St.-Hil. Toxicol Appl Pharmacol 2016; 310:1-8. [DOI: 10.1016/j.taap.2016.08.015] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Revised: 08/08/2016] [Accepted: 08/16/2016] [Indexed: 12/30/2022]
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Micronucleated erythrocytes in newborns rats exposed to three different types of ultraviolet-A (UVA) lamps from commonly uses devices. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2016; 165:141-146. [PMID: 27792890 DOI: 10.1016/j.jphotobiol.2016.10.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Revised: 09/27/2016] [Accepted: 10/18/2016] [Indexed: 11/23/2022]
Abstract
Exposure to ultraviolet-A (UVA) light can accidentally cause adverse effects in the skin and eyes. UVA induces DNA damage directly by creating pyrimidine dimers or by the formation of reactive oxygen species that can indirectly affect DNA integrity. UVA radiation is emitted by lamps from everyday devices. In adult rats, micronucleated erythrocytes (MNE) are removed from the circulation by the spleen. However, in newborn rats, MNE have been observed in peripheral blood erythrocytes. The objective of this study was to use micronucleus tests to evaluate the DNA damage caused in newborn rats exposed to UVA light from three different types of UVA lamps obtained from commonly used devices: counterfeit detectors, insecticide devices, and equipment used to harden resins for artificial nails. Rat neonates were exposed to UVA lamps for 20min daily for 6days. The neonates were sampled every third day, and the numbers of MNE and micronucleated polychromatic erythrocytes (MNPCE) in the peripheral blood were determined. The rat neonates exposed to the three types of UVA lamps showed increased numbers of MNE and MNPCE from 48h to 144h (P<0.05 and P<0.001 respectively). However, no relationship was observed between the number of MNE and the wattage of the lamps. In conclusion, under these conditions, UVA light exposure induced an increase in MNE without causing any apparent damage to the skin.
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Hayashi M. The micronucleus test-most widely used in vivo genotoxicity test. Genes Environ 2016; 38:18. [PMID: 27733885 PMCID: PMC5045625 DOI: 10.1186/s41021-016-0044-x] [Citation(s) in RCA: 134] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2016] [Accepted: 05/04/2016] [Indexed: 12/03/2022] Open
Abstract
Genotoxicity is commonly evaluated during the chemical safety assessment together with other toxicological endpoints. The micronucleus test is always included in many genotoxic test guidelines for long time in many classes of chemicals, e.g., pharmaceutical chemicals, agricultural chemicals, food additives. Although the trend of the safety assessment of chemicals faces to animal welfare and in vitro systems are more welcome than the in vivo systems, the in vivo test systems are paid more attention in the field of genotoxicity because of its weight of evidence. In this review, I will summarize the following points: 1) historical consideration of the test development, 2) characteristics of the test including advantages and limitations, 3) new approaches considering to the animal welfare.
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Affiliation(s)
- Makoto Hayashi
- makoto international consulting (mic), Kami-imaizumi, Ebina, Kanagawa 243-0431 Japan
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Nallanthighal S, Shirode AB, Judd JA, Reliene R. Pomegranate Intake Protects Against Genomic Instability Induced by Medical X-rays In Vivo in Mice. Nutr Cancer 2016; 68:1349-1356. [PMID: 27673354 DOI: 10.1080/01635581.2016.1225104] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Ionizing radiation (IR) is a well-documented human carcinogen. The increased use of IR in medical procedures has doubled the annual radiation dose and may increase cancer risk. Genomic instability is an intermediate lesion in IR-induced cancer. We examined whether pomegranate extract (PE) suppresses genomic instability induced by x-rays. Mice were treated orally with PE and exposed to an x-ray dose of 2 Gy. PE intake suppressed x-ray-induced DNA double-strand breaks (DSBs) in peripheral blood and chromosomal damage in bone marrow. We hypothesized that PE-mediated protection against x-ray-induced damage may be due to the upregulation of DSB repair and antioxidant enzymes and/or increase in glutathione (GSH) levels. We found that expression of DSB repair genes was not altered (Nbs1 and Rad50) or was reduced (Mre11, DNA-PKcs, Ku80, Rad51, Rad52 and Brca2) in the liver of PE-treated mice. Likewise, mRNA levels of antioxidant enzymes were reduced (Gpx1, Cat, and Sod2) or were not altered (HO-1 and Sod1) as a function of PE treatment. In contrast, PE-treated mice with and without IR exposure displayed higher hepatic GSH concentrations than controls. Thus, ingestion of pomegranate polyphenols is associated with inhibition of x-ray-induced genomic instability and elevated GSH, which may reduce cancer risk.
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Affiliation(s)
- Sameera Nallanthighal
- a Cancer Research Center , University at Albany , Rensselaer , New York , USA.,b Department of Biomedical Sciences , University at Albany, State University of New York , Albany , New York , USA
| | - Amit B Shirode
- a Cancer Research Center , University at Albany , Rensselaer , New York , USA.,c Department of Environmental Health Sciences , University at Albany, State University of New York , Albany , New York , USA
| | - Julius A Judd
- a Cancer Research Center , University at Albany , Rensselaer , New York , USA.,c Department of Environmental Health Sciences , University at Albany, State University of New York , Albany , New York , USA
| | - Ramune Reliene
- a Cancer Research Center , University at Albany , Rensselaer , New York , USA.,c Department of Environmental Health Sciences , University at Albany, State University of New York , Albany , New York , USA
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Machado CDS, Venancio VP, Aissa AF, Hernandes LC, Mello MBD, Lama JECD, Marzocchi-Machado CM, Bianchi MLP, Antunes LMG. Vitamin D3 deficiency increases DNA damage and the oxidative burst of neutrophils in a hypertensive rat model. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2016; 798-799:19-26. [DOI: 10.1016/j.mrgentox.2016.01.005] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Revised: 01/20/2016] [Accepted: 01/25/2016] [Indexed: 02/07/2023]
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Azevedo L, Chagas-Paula DA, Kim H, Roque ACM, Dias KST, Machado JC, Soares MG, Mertens-Talcott SU. White mold (Sclerotinia sclerotiorum), friend or foe: Cytotoxic and mutagenic activities in vitro and in vivo. Food Res Int 2016. [DOI: 10.1016/j.foodres.2015.11.029] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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NAI GA, LOGAR GDA, MORI GG, TEIXEIRA LM, SILVA BCFD, MORAES AEMD, CABRAL FA. Evaluation of the genotoxicity and mutagenicity of Ca3SiO5-based cement. Braz Oral Res 2016; 30:S1806-83242016000100277. [DOI: 10.1590/1807-3107bor-2016.vol30.0097] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Accepted: 06/08/2016] [Indexed: 11/22/2022] Open
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Roberts DJ, McKeon M, Xu Y, Stankowski LF. Comparison of integrated genotoxicity endpoints in rats after acute and subchronic oral doses of 4-nitroquinoline-1-oxide. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2016; 57:17-27. [PMID: 26407646 PMCID: PMC7362388 DOI: 10.1002/em.21981] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2015] [Accepted: 08/17/2015] [Indexed: 05/16/2023]
Abstract
During interlaboratory validation trials for the Pig-a gene mutation assay we assessed the genotoxicity of 4-nitroquinoline-1-oxide (4NQO) across endpoints in multiple tissues: induction of Pig-a mutant red blood cells (RBCs) and reticulocytes (RETs); micronucleated RETs (MN RETs); and DNA damage in blood and liver via the alkaline Comet assay (%tail intensity [TI]). In a previous subchronic toxicity study with 28 daily doses, biologically meaningful increases were observed only for Pig-a mutant RBCs/RETs while marginal increases in the frequency of MN RET were observed, and other clastogenic endpoints were negative. Follow up acute studies were performed using the same cumulative doses (0, 35, 70, 105, and 140 mg/kg) administered in a bolus, or split over three equal daily doses, with samples collected up to 1 month after the last dose. Both of the acute dosing regimens produced similar results, in that endpoints were either positive or negative, regardless of 1 or 3 daily doses, but the three consecutive daily dose regimen yielded more potent responses in TI (in liver and blood) and Pig-a mutant frequencies. In these acute studies the same cumulative doses of 4NQO induced positive responses in clastogenic endpoints that were negative or inconclusive using a subchronic study design. Additionally, a positive control group using combination doses of cyclophosphamide and ethyl methanesulfonate was employed to assess assay validity and potentially identify a future positive control treatment for integrated genetic toxicity studies.
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Affiliation(s)
- Daniel J Roberts
- Bristol-Myers Squibb, New Brunswick, NJ, USA
- Joint Graduate Program of Toxicology, Rutgers, NJ, USA
| | | | - Yong Xu
- BioReliance Corporation, Rockville, MD, USA
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Kirkland D, Gatehouse D. "Aspartame: A review of genotoxicity data". Food Chem Toxicol 2015; 84:161-8. [PMID: 26321723 DOI: 10.1016/j.fct.2015.08.021] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Revised: 08/19/2015] [Accepted: 08/23/2015] [Indexed: 11/30/2022]
Abstract
Aspartame is a methyl ester of a dipeptide of aspartic acid and phenylalanine. It is 200× sweeter than sucrose and is approved for use in food products in more than 90 countries around the world. Aspartame has been evaluated for genotoxic effects in microbial, cell culture and animal models, and has been subjected to a number of carcinogenicity studies. The in vitro and in vivo genotoxicity data available on aspartame are considered sufficient for a thorough evaluation. There is no evidence of induction of gene mutations in a series of bacterial mutation tests. There is some evidence of induction of chromosomal damage in vitro, but this may be an indirect consequence of cytotoxicity. The weight of evidence from in vivo bone marrow micronucleus, chromosomal aberration and Comet assays is that aspartame is not genotoxic in somatic cells in vivo. The results of germ cell assays are difficult to evaluate considering limited data available and deviations from standard protocols. The available data therefore support the conclusions of the European Food Safety Authority (EFSA) that aspartame is non-genotoxic.
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Affiliation(s)
- David Kirkland
- Kirkland Consulting, P O Box 79, Tadcaster, LS24 0AS, United Kingdom.
| | - David Gatehouse
- Old Barn, Cherry Orchard Lane, Wyddial, Near Buntingford, Herts SG9 0EN, United Kingdom
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Kotova N, Hebert N, Härnwall EL, Vare D, Mazurier C, Douay L, Jenssen D, Grawé J. A novel micronucleus in vitro assay utilizing human hematopoietic stem cells. Toxicol In Vitro 2015. [PMID: 26208286 DOI: 10.1016/j.tiv.2015.07.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The induction of micronucleated reticulocytes in the bone marrow is a sensitive indicator of chromosomal damage. Therefore, the micronucleus assay in rodents is widely used in genotoxicity and carcinogenicity testing. A test system based on cultured human primary cells could potentially provide better prediction compared to animal tests, increasing patient safety while also implementing the 3Rs principle, i.e. replace, reduce and refine. Hereby, we describe the development of an in vitro micronucleus assay based on animal-free ex vivo culture of human red blood cells from hematopoietic stem cells. To validate the method, five clastogens with direct action, three clastogens requiring metabolic activation, four aneugenic and three non-genotoxic compounds have been tested. Also, different metabolic systems have been applied. Flow cytometry was used for detection and enumeration of micronuclei. Altogether, the results were in agreement with the published data and indicated that a sensitive and cost effective in vitro assay to assess genotoxicity with a potential to high-throughput screening has been developed.
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Affiliation(s)
- N Kotova
- Stockholm University, Department of Molecular Biosciences, The Wenner-Gren Institute, SE-106 91 Stockholm, Sweden.
| | - N Hebert
- UPMC Univ Paris 06, UMR_S938 CDR Saint-Antoine, Prolifération et Différentiation des Cellules Souches, Paris, France; INSERM, UMR_S938, Prolifération et Différentiation des Cellules Souches, Paris, France; Etablissement Francais du Sang Ile de France, Ivry-sur-Seine, France
| | - E-L Härnwall
- Stockholm University, Department of Molecular Biosciences, The Wenner-Gren Institute, SE-106 91 Stockholm, Sweden
| | - D Vare
- Stockholm University, Department of Molecular Biosciences, The Wenner-Gren Institute, SE-106 91 Stockholm, Sweden
| | - C Mazurier
- UPMC Univ Paris 06, UMR_S938 CDR Saint-Antoine, Prolifération et Différentiation des Cellules Souches, Paris, France; INSERM, UMR_S938, Prolifération et Différentiation des Cellules Souches, Paris, France; Etablissement Francais du Sang Ile de France, Ivry-sur-Seine, France
| | - L Douay
- UPMC Univ Paris 06, UMR_S938 CDR Saint-Antoine, Prolifération et Différentiation des Cellules Souches, Paris, France; INSERM, UMR_S938, Prolifération et Différentiation des Cellules Souches, Paris, France; Etablissement Francais du Sang Ile de France, Ivry-sur-Seine, France; AP-HP, Hôpital Saint-Antoine, Service d'Hématologie Biologique, Paris, France
| | - D Jenssen
- Stockholm University, Department of Molecular Biosciences, The Wenner-Gren Institute, SE-106 91 Stockholm, Sweden
| | - J Grawé
- Dept. of Genetics and Pathology, Uppsala University, SE-751 85 Uppsala, Sweden
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Novak Zobiole N, Caon T, Wildgrube Bertol J, Pereira CADS, Okubo BM, Moreno SE, Cardozo FTGDS. In vitro and in vivo genotoxic evaluation of Bothrops moojeni snake venom. PHARMACEUTICAL BIOLOGY 2015; 53:930-934. [PMID: 25430737 DOI: 10.3109/13880209.2014.950385] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
CONTEXT Bothrops moojeni Hoge (Viperidae) venom is a complex mixture of compounds with therapeutic potential that has been included in the research and development of new drugs. Along with the biological activity, the pharmaceutical applicability of this venom depends on its toxicological profile. OBJECTIVE This study evaluates the cytotoxicity and genotoxicity of the Bothrops moojeni venom (BMV). MATERIAL AND METHODS The in vitro cytotoxicity and genotoxicity of a pooled sample of BMV was assessed by the MTT and Comet assay, respectively. Genotoxicity was also evaluated in vivo through the micronucleus assay. RESULTS BMV displayed a 50% cytotoxic concentration (CC50) on Vero cells of 4.09 µg/mL. Vero cells treated with 4 µg/mL for 90 min and 6 h presented significant (p < 0.05, ANOVA/Newman-Keuls test) higher DNA damage than the negative control in the Comet assay. The lower DNA damage found after 6 h compared with the 90 min treatment suggests a DNA repair effect. Mice intraperitoneally treated with BMV at 10, 30, or 80 µg/animal presented significant genotoxicity (p < 0.05, ANOVA/Newman-Keuls test) in relation to the negative control after 24 h of treatment. Contrary to the in vitro results, no DNA repair seemed to occur in vivo up to 96 h post-venom inoculation at a dose of 30 µg/animal. DISCUSSION AND CONCLUSION The results show that BMV presents cyto- and genotoxicity depending on the concentration/dose used. These findings emphasize the importance of toxicological studies, including assessment of genotoxicity, in the biological activity research of BMV and/or in the development of BMV-derived products.
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Lombardot B, Oh CT, Kwak J, Genovesio A, Kang M, Hansen MAE, Han SJ. High-throughput in vivo genotoxicity testing: an automated readout system for the somatic mutation and recombination test (SMART). PLoS One 2015; 10:e0121287. [PMID: 25830368 PMCID: PMC4382174 DOI: 10.1371/journal.pone.0121287] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Accepted: 01/29/2015] [Indexed: 11/27/2022] Open
Abstract
Genotoxicity testing is an important component of toxicity assessment. As illustrated by the European registration, evaluation, authorization, and restriction of chemicals (REACH) directive, it concerns all the chemicals used in industry. The commonly used in vivo mammalian tests appear to be ill adapted to tackle the large compound sets involved, due to throughput, cost, and ethical issues. The somatic mutation and recombination test (SMART) represents a more scalable alternative, since it uses Drosophila, which develops faster and requires less infrastructure. Despite these advantages, the manual scoring of the hairs on Drosophila wings required for the SMART limits its usage. To overcome this limitation, we have developed an automated SMART readout. It consists of automated imaging, followed by an image analysis pipeline that measures individual wing genotoxicity scores. Finally, we have developed a wing score-based dose-dependency approach that can provide genotoxicity profiles. We have validated our method using 6 compounds, obtaining profiles almost identical to those obtained from manual measures, even for low-genotoxicity compounds such as urethane. The automated SMART, with its faster and more reliable readout, fulfills the need for a high-throughput in vivo test. The flexible imaging strategy we describe and the analysis tools we provide should facilitate the optimization and dissemination of our methods.
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Affiliation(s)
- Benoit Lombardot
- Image Mining Group, Institut Pasteur Korea, Sampyeong-dong 696, Bundang-gu, Seongnam-si, Gyeonggi-do, Korea
| | - Chun-Taek Oh
- Drug Biology Group, Institut Pasteur Korea, Sampyeong-dong 696, Bundang-gu, Seongnam-si, Gyeonggi-do, Korea
| | - Jihoon Kwak
- Image Mining Group, Institut Pasteur Korea, Sampyeong-dong 696, Bundang-gu, Seongnam-si, Gyeonggi-do, Korea
| | - Auguste Genovesio
- Image Mining Group, Institut Pasteur Korea, Sampyeong-dong 696, Bundang-gu, Seongnam-si, Gyeonggi-do, Korea
| | - Myungjoo Kang
- Department of Mathematical Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151–747, Korea
| | - Michael Adsett Edberg Hansen
- Image Mining Group, Institut Pasteur Korea, Sampyeong-dong 696, Bundang-gu, Seongnam-si, Gyeonggi-do, Korea
- * E-mail: (SJH); (MH)
| | - Sung-Jun Han
- Drug Biology Group, Institut Pasteur Korea, Sampyeong-dong 696, Bundang-gu, Seongnam-si, Gyeonggi-do, Korea
- * E-mail: (SJH); (MH)
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Effects of maternal vitamin B6 deficiency and over-supplementation on DNA damage and oxidative stress in rat dams and their offspring. Food Chem Toxicol 2015; 80:201-205. [PMID: 25818462 DOI: 10.1016/j.fct.2015.03.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2014] [Revised: 03/16/2015] [Accepted: 03/17/2015] [Indexed: 11/21/2022]
Abstract
Vitamin B6 is a cofactor for more than 140 essential enzymes and plays an important role in maternal health and fetal development. The goal of this study was to investigate the effects of maternal vitamin B6 on DNA damage and oxidative stress status in rat dams and their offspring. Female Wistar rats were randomly assigned to three dietary groups fed a standard diet (control diet), a diet supplemented with 30 mg/kg of vitamin B6, or a deficient diet (0 mg/kg of vitamin B6) for 10 weeks before and during mating, pregnancy and lactation. The dams were euthanized at weaning, and their male pups were euthanized either 10 days or 100 days after birth. We found that maternal vitamin B6 deficiency increased the micronucleus frequency in peripheral blood and bone marrow cells and also increased the concentration of hepatic TBARS (thiobarbituric acid reactive substances) in newborn pups (10 days old). In conclusion, maternal 5- to 6-fold over-supplementation of vitamin B6 had no adverse effects, however its deficiency may induce chromosomal damage and hepatic lipid peroxidation in the offspring.
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Uno Y, Morita T, Luijten M, Beevers C, Hamada S, Itoh S, Ohyama W, Takasawa H. Micronucleus test in rodent tissues other than liver or erythrocytes: Report of the IWGT working group. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2015; 783:19-22. [PMID: 25953397 DOI: 10.1016/j.mrgentox.2015.03.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Accepted: 03/03/2015] [Indexed: 10/23/2022]
Abstract
At the 6th International Workshop on Genotoxicity Testing, the liver micronucleus test (MNT) working group briefly discussed the MNT using tissues other than liver/erythrocytes. Many tissues other than liver/erythrocytes have been studied, primarily for research purposes. They have included the colon and intestinal epithelium, skin, spleen, lung, stomach, bladder, buccal mucosa, vagina, and fetal/neonatal tissues. These tissues were chosen because they were target sites of carcinogens, and/or relevant to a specific route of exposure. Recently, there has been particular focus on the gastrointestinal (GI) tract as it is a contact site associated with high exposure following oral gavage. Furthermore GI tumors are observed with high frequency in human populations. A collaborative study of the rat glandular stomach and colon MNT was conducted in conjunction with a collaborative study of the repeated-dose liver MNT. Based on limited data currently available, the rodent MNT using the glandular stomach and/or colon seems to detect genotoxic carcinogens with GI tract target-organ specificity. The working group concluded that the GI tract MNT would be a promising method to examine clastogenicity or aneugenicity of test chemicals in the stomach and/or colon. Further data will be needed to fully establish the methods, and to identify the sensitivity and specificity of the GI tract MNT.
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Affiliation(s)
| | | | - Mirjam Luijten
- National Institute for Public Health and the Environment (RIVM), Bilthoven, The Netherlands
| | | | - Shuichi Hamada
- LSI Medience (Formerly Mitsubishi Chemical Medience Co.), Ibaraki, Japan
| | | | | | - Hironao Takasawa
- LSI Medience (Formerly Mitsubishi Chemical Medience Co.), Ibaraki, Japan
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50
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Evaluation of the repeated-dose liver and gastrointestinal tract micronucleus assays with 22 chemicals using young adult rats: Summary of the collaborative study by the Collaborative Study Group for the Micronucleus Test (CSGMT)/The Japanese Environmental Mutagen Society (JEMS) – Mammalian Mutagenicity Study Group (MMS). MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2015; 780-781:2-17. [DOI: 10.1016/j.mrgentox.2015.01.001] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2014] [Accepted: 01/02/2015] [Indexed: 11/21/2022]
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