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Chisada S, Ohtsuka K, Fujiwara M, Yoshida M, Matsushima S, Watanabe T, Karita K, Ohnishi H. A rad50 germline mutation induces tumorigenesis and ataxia-telangiectasia phenotype in a transparent medaka model. PLoS One 2023; 18:e0282277. [PMID: 37098078 PMCID: PMC10129005 DOI: 10.1371/journal.pone.0282277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Accepted: 02/11/2023] [Indexed: 04/26/2023] Open
Abstract
The MRE11A-RAD50-NBS1 complex activates the ataxia-telangiectasia mutated (ATM) pathway and plays a central role in genome homeostasis. The association of RAD50 mutations with disease remains unclear; hence, we adopted a medaka rad50 mutant to demonstrate the significance of RAD50 mutation in pathogenesis using the medaka as an experimental animal. A 2-base pair deletion in the rad50 gene was introduced into transparent STIII medaka using the CRISPR/Cas9 system. The mutant was analyzed histologically for tumorigenicity and hindbrain quality, as well as for swimming behavior, to compare with existing ATM-, MRE11A-, and NBS1-mutation-related pathology. Our results revealed that the medaka rad50 mutation concurrently reproduced tumorigenesis (8 out of 10 rad50Δ2/+ medaka), had a decrease in median survival time (65.7 ± 1.1 weeks in control vs. 54.2 ± 2.6 weeks in rad50Δ2/+ medaka, p = 0.001, Welch's t-test), exhibited semi-lethality in rad50Δ2/Δ2 medaka and most of the major ataxia-telangiectasia phenotypes, including ataxia (rheotaxis ability was lower in rad50Δ2/+ medaka than in the control, Mann-Whitney U test, p < 0.05), and telangiectasia (6 out of 10 rad50Δ2/+ medaka). The fish model may aid in further understanding the tumorigenesis and phenotype of ataxia-telangiectasia-related RAD50 germline mutations and in developing novel therapeutic strategies against RAD50 molecular disorders.
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Affiliation(s)
- Shinichi Chisada
- Department of Hygiene and Public Health, Kyorin University School of Medicine, Mitaka, Tokyo, Japan
| | - Kouki Ohtsuka
- Department of Laboratory Medicine, Kyorin University School of Medicine, Mitaka, Tokyo, Japan
| | - Masachika Fujiwara
- Department of Pathology, Kyorin University School of Medicine, Mitaka, Tokyo, Japan
| | - Masao Yoshida
- Department of Hygiene and Public Health, Kyorin University School of Medicine, Mitaka, Tokyo, Japan
| | - Satsuki Matsushima
- Department of Laboratory Medicine, Kyorin University School of Medicine, Mitaka, Tokyo, Japan
| | - Takashi Watanabe
- Department of Laboratory Medicine, Kyorin University School of Medicine, Mitaka, Tokyo, Japan
| | - Kanae Karita
- Department of Hygiene and Public Health, Kyorin University School of Medicine, Mitaka, Tokyo, Japan
| | - Hiroaki Ohnishi
- Department of Laboratory Medicine, Kyorin University School of Medicine, Mitaka, Tokyo, Japan
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2
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Nava-Rivera LE, Betancourt-Martínez ND, Lozoya-Martínez R, Carranza-Rosales P, Guzmán-Delgado NE, Carranza-Torres IE, Delgado-Aguirre H, Zambrano-Ortíz JO, Morán-Martínez J. Transgenerational effects in DNA methylation, genotoxicity and reproductive phenotype by chronic arsenic exposure. Sci Rep 2021; 11:8276. [PMID: 33859283 PMCID: PMC8050275 DOI: 10.1038/s41598-021-87677-y] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Accepted: 03/24/2021] [Indexed: 12/25/2022] Open
Abstract
An emerging concern is the influences of early life exposure to environmental toxicants on offspring characteristics in later life. Since recent evidence suggests a transgenerational transference of aberrant phenotypes from exposed-parents to non-exposed offspring related to adult-onset diseases including reproductive phenotype. The transgenerational potential of arsenic a well know genotoxic and epigenetic modifier agent has not been assessed in mammals until now. In this experimental study, we evaluated the transgenerational effects of arsenic in a rat model with chronic exposure to arsenic. Rats chronically exposed to arsenic in drinking water (1 mg As2O3/mL) (F0) were mated to produce the arsenic lineage (F1, F2, and F3). The arsenic toxic effects on were evaluated over the four generations by analyzing the DNA methylation percentage, genotoxicity in WBC and physical and reproductive parameters, including sperm quality parameters and histopathological evaluation of the gonads. Chronic exposure to arsenic caused genotoxic damage (F0-F3) different methylation patterns, alterations in physical and reproductive parameters, aberrant morphology in the ovaries (F0 and F1) and testicles (F1-F3), and a decrease in the quality of sperm (F0-F3, except F2). Parental chronic arsenic exposure causes transgenerational genotoxicity and changes in global DNA methylation which might be associated with reproductive defects in rats. Combined with recent studies reveal that disturbances in the early life of an individual can affect the health of later generations.
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Affiliation(s)
- Lydia Enith Nava-Rivera
- Departamento de Biología Celular y Ultraestructura, Centro de Investigación Biomédica, Facultad de Medicina, Universidad Autónoma de Coahuila Unidad Torreón, Gregorio A. García No. 198 sur. Colonia centro, Torreón, Coahuila, CP 27000, México
| | - Nadia Denys Betancourt-Martínez
- Departamento de Biología Celular y Ultraestructura, Centro de Investigación Biomédica, Facultad de Medicina, Universidad Autónoma de Coahuila Unidad Torreón, Gregorio A. García No. 198 sur. Colonia centro, Torreón, Coahuila, CP 27000, México
| | - Rodrigo Lozoya-Martínez
- Departamento de Biología Celular y Ultraestructura, Centro de Investigación Biomédica, Facultad de Medicina, Universidad Autónoma de Coahuila Unidad Torreón, Gregorio A. García No. 198 sur. Colonia centro, Torreón, Coahuila, CP 27000, México
| | - Pilar Carranza-Rosales
- Centro de Investigación Biomédica del Noreste, Instituto Mexicano del Seguro Social, Monterrey, Nuevo León, Mexico
| | - Nancy Elena Guzmán-Delgado
- División de Investigación en Salud, Unidad Médica de Alta Especialidad, Hospital de Cardiología #34, Instituto Mexicano del Seguro Social, Monterrey, Nuevo León, Mexico
| | - Irma Edith Carranza-Torres
- Centro de Investigación Biomédica del Noreste, Instituto Mexicano del Seguro Social, Monterrey, Nuevo León, Mexico
| | - Hector Delgado-Aguirre
- Laboratorio de Histocompatibilidad, Unidad Médica de Alta Especialidad (UMAE) # 71, Instituto Mexicano del Seguro Social, Torreón, Coahuila, Mexico
| | - José Omar Zambrano-Ortíz
- Departamento de Biología Celular y Ultraestructura, Centro de Investigación Biomédica, Facultad de Medicina, Universidad Autónoma de Coahuila Unidad Torreón, Gregorio A. García No. 198 sur. Colonia centro, Torreón, Coahuila, CP 27000, México
| | - Javier Morán-Martínez
- Departamento de Biología Celular y Ultraestructura, Centro de Investigación Biomédica, Facultad de Medicina, Universidad Autónoma de Coahuila Unidad Torreón, Gregorio A. García No. 198 sur. Colonia centro, Torreón, Coahuila, CP 27000, México.
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3
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Bertucci EM, Mason MW, Camus AC, Rhodes OE, Parrott BB. Chronic low dose irradiation alters hepatic transcriptional profiles, but not global DNA methylation in medaka (Oryzias latipes). THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 729:138680. [PMID: 32361431 DOI: 10.1016/j.scitotenv.2020.138680] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 03/26/2020] [Accepted: 04/11/2020] [Indexed: 06/11/2023]
Abstract
Ionizing radiation (IR) resulting from both natural and anthropogenic sources is ubiquitous throughout the environment. Historically, studies on the biological impacts of radiation primarily focused on responses to acute doses of radiation, with little advancement in our understanding of environmentally relevant exposures. Epigenetic mechanisms are capable of mediating organismal responses to environmental stressors and DNA methylation plays important roles in gene regulation and promoting chromosomal stability. Here, we assess broad-scale transcriptional and epigenetic variation resulting from chronic exposure to low doses of ionizing radiation (LDIR; 5.78, 53.76, or 520.23 mGy/day) using Japanese medaka fish (Oryzias latipes) in a replicated mesocosm design. We observed significant changes to the hepatic transcriptome induced by a 3-month chronic exposure to IR, whereas global DNA methylation appeared largely unaffected. Our findings reveal a set of genes, including those involved in immune function, responding to environmentally relevant IR exposures, which do not appear to be mediated by a systemic global shift in DNA methylation.
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Affiliation(s)
- Emily M Bertucci
- Odum School of Ecology, University of Georgia, 140 E. Green St., Athens 30602, GA, USA; Savannah River Ecology Laboratory, University of Georgia, P.O. Drawer E, Aiken 29802, SC, USA.
| | - Marilyn W Mason
- Savannah River Ecology Laboratory, University of Georgia, P.O. Drawer E, Aiken 29802, SC, USA.
| | - Alvin C Camus
- College of Veterinary Medicine Department of Pathology, University of Georgia, 501 D.W. Brooks Drive, Athens 30602, GA, USA.
| | - Olin E Rhodes
- Odum School of Ecology, University of Georgia, 140 E. Green St., Athens 30602, GA, USA; Savannah River Ecology Laboratory, University of Georgia, P.O. Drawer E, Aiken 29802, SC, USA.
| | - Benjamin B Parrott
- Odum School of Ecology, University of Georgia, 140 E. Green St., Athens 30602, GA, USA; Savannah River Ecology Laboratory, University of Georgia, P.O. Drawer E, Aiken 29802, SC, USA.
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4
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Fuller N, Smith JT, Ford AT. Impacts of ionising radiation on sperm quality, DNA integrity and post-fertilisation development in marine and freshwater crustaceans. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 186:109764. [PMID: 31610356 DOI: 10.1016/j.ecoenv.2019.109764] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Revised: 09/27/2019] [Accepted: 10/04/2019] [Indexed: 06/10/2023]
Abstract
Crustaceans have been designated as internationally important model organisms in the development of environmental radioprotection measures. Despite the known sensitivity of sperm to ionizing radiation, the impacts of chronic radiation exposure on male fertility in crustaceans have not been studied. For the first time, the present study aimed to assess the impacts of chronic radiation exposure on male fertility, sperm DNA damage and concomitant impacts on breeding in two amphipod crustaceans. Echinogammarus marinus and Gammarus pulex (male fertility only) were exposed to phosphorus-32 at dose rates of 0, 0.1, 1 and 10 mGy/d and sperm parameters, DNA damage and knock-on impacts on breeding were assessed. Sperm quality parameters and DNA damage were assessed using a fluorescent staining method and single cell gel electrophoresis respectively. Concomitant effects of male exposure to radiation on fecundity were determined by pairing phosphorus-32 exposed males to unexposed sexually mature females. In E. marinus, a statistically significant reduction of 9 and 11% in the quality of sperm was recorded at dose rates of 1 and 10 mGy/d respectively, with no significant effects recorded on sperm counts. Conversely in the freshwater G. pulex, no significant impact of radiation on sperm quantity or quality was recorded. For E. marinus, a statistically significant increase in DNA damage was recorded at doses of 10 mGy/d. Reduced fecundity and an increase in the frequency of abnormal embryos was recorded in female E. marinus breeding with males exposed to radiation. These findings suggest sperm quality may be a sensitive indicator of radiation exposure in invertebrates with potential impacts on the unexposed embryo, though unclear dose-response and differences between two closely related species necessitate further study before robust conclusions can be drawn.
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Affiliation(s)
- Neil Fuller
- Institute of Marine Sciences, School of Biological Sciences, University of Portsmouth, Ferry Road, Portsmouth, Hampshire, PO4 9LY, UK.
| | - Jim T Smith
- School of Earth & Environmental Sciences, University of Portsmouth, Burnaby Building, Burnaby Road, Portsmouth, Hampshire, PO1 3QL, UK
| | - Alex T Ford
- Institute of Marine Sciences, School of Biological Sciences, University of Portsmouth, Ferry Road, Portsmouth, Hampshire, PO4 9LY, UK.
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5
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Reis P, Pereira R, Carvalho FP, Oliveira J, Malta M, Mendo S, Lourenço J. Life history traits and genotoxic effects on Daphnia magna exposed to waterborne uranium and to a uranium mine effluent - A transgenerational study. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2018; 202:16-25. [PMID: 29966909 DOI: 10.1016/j.aquatox.2018.06.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Revised: 06/06/2018] [Accepted: 06/11/2018] [Indexed: 06/08/2023]
Abstract
Assessing the impact of uranium mining industry on aquatic ecosystems near mining areas is critical to ensure the long-term health and sustainability of ecosystem services. As so, a transgenerational study with Daphnia magna has been conducted to perceive to what extent intermittent discharges of uranium mine effluents into watercourses may impact the DNA integrity and life history traits of cladocerans. Organisms were exposed for 48 h to a 2% dilution of an uranium mine effluent (UME) and to a corresponding dose of waterborne uranium (WU) that, according to our preliminary studies, induces significant DNA damage in daphnids. After exposure, organisms were transferred to clean medium, where three successive generations were monitored for genotoxicity and other effects at the individual and population level. Despite some differences between WU and UME data, our results revealed that the negative impacts of the short-term exposure gradually disappeared after placing the organisms in clean medium. These results suggest that, under intermittent stress, daphnids are able to recover, since after the 3rd brood release, DNA damage (measured as DNA strand breaks) is no longer observed and has no significant impact on the detectable life traits of offspring. Although our results indicate that populations of D. magna are not affected by intermittent and highly diluted discharges from uranium mining, aquatic systems under this kind of pressure should not be seen as hazardous-free. Future studies in this field are recommended and these should consider radionuclides in the water column, their accumulation in the sediments and also multiple life stages.
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Affiliation(s)
- Paulo Reis
- Department of Biology & GreenUPorto - Research Center on Sustainable Agrifood Production, Faculty of Sciences of the University of Porto, Rua do Campo Alegre s/n, 4169-007, Porto, Portugal
| | - Ruth Pereira
- Department of Biology & GreenUPorto - Research Center on Sustainable Agrifood Production, Faculty of Sciences of the University of Porto, Rua do Campo Alegre s/n, 4169-007, Porto, Portugal; CIIMAR - Interdisciplinary Centre of Marine and Environmental Research, Terminal de Cruzeiro de Leixões, Avenida General Norton de Matos s/n, 4450-208, Matosinhos, Porto, Portugal.
| | - F P Carvalho
- Instituto Superior Técnico/Laboratório de Proteção e Segurança Radiológica, Universidade de Lisboa, Estrada Nacional 10, km 139, 2695-066, Bobadela LRS, Portugal
| | - J Oliveira
- Instituto Superior Técnico/Laboratório de Proteção e Segurança Radiológica, Universidade de Lisboa, Estrada Nacional 10, km 139, 2695-066, Bobadela LRS, Portugal
| | - M Malta
- Instituto Superior Técnico/Laboratório de Proteção e Segurança Radiológica, Universidade de Lisboa, Estrada Nacional 10, km 139, 2695-066, Bobadela LRS, Portugal
| | - Sónia Mendo
- Department of Biology & CESAM, University of Aveiro, 3810-193, Aveiro, Portugal
| | - Joana Lourenço
- Department of Biology & CESAM, University of Aveiro, 3810-193, Aveiro, Portugal
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6
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Tang FR, Loke WK, Khoo BC. Low-dose or low-dose-rate ionizing radiation-induced bioeffects in animal models. JOURNAL OF RADIATION RESEARCH 2017; 58:165-182. [PMID: 28077626 PMCID: PMC5439383 DOI: 10.1093/jrr/rrw120] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Revised: 01/22/2016] [Indexed: 05/13/2023]
Abstract
Animal experimental studies indicate that acute or chronic low-dose ionizing radiation (LDIR) (≤100 mSv) or low-dose-rate ionizing radiation (LDRIR) (<6 mSv/h) exposures may be harmful. It induces genetic and epigenetic changes and is associated with a range of physiological disturbances that includes altered immune system, abnormal brain development with resultant cognitive impairment, cataractogenesis, abnormal embryonic development, circulatory diseases, weight gain, premature menopause in female animals, tumorigenesis and shortened lifespan. Paternal or prenatal LDIR/LDRIR exposure is associated with reduced fertility and number of live fetuses, and transgenerational genomic aberrations. On the other hand, in some experimental studies, LDIR/LDRIR exposure has also been reported to bring about beneficial effects such as reduction in tumorigenesis, prolonged lifespan and enhanced fertility. The differences in reported effects of LDIR/LDRIR exposure are dependent on animal genetic background (susceptibility), age (prenatal or postnatal days), sex, nature of radiation exposure (i.e. acute, fractionated or chronic radiation exposure), type of radiation, combination of radiation with other toxic agents (such as smoking, pesticides or other chemical toxins) or animal experimental designs. In this review paper, we aimed to update radiation researchers and radiologists on the current progress achieved in understanding the LDIR/LDRIR-induced bionegative and biopositive effects reported in the various animal models. The roles played by a variety of molecules that are implicated in LDIR/LDRIR-induced health effects will be elaborated. The review will help in future investigations of LDIR/LDRIR-induced health effects by providing clues for designing improved animal research models in order to clarify the current controversial/contradictory findings from existing studies.
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Affiliation(s)
- Feng Ru Tang
- Singapore Nuclear Research and Safety Initiative (SNRSI), National University of Singapore, 1 CREATE Way #04-01, CREATE Tower, 138602, Singapore
| | - Weng Keong Loke
- Temasek Laboratories, National University of Singapore, 5A, Engineering Drive 1, 117411,Singapore
| | - Boo Cheong Khoo
- DSO National Laboratories,Defence Medical and Environmental Research Institute, 11 Stockport Road,117605,Singapore
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7
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Lemos J, Neuparth T, Trigo M, Costa P, Vieira D, Cunha L, Ponte F, Costa PS, Metello LF, Carvalho AP. Single Low-Dose Ionizing Radiation Induces Genotoxicity in Adult Zebrafish and its Non-Irradiated Progeny. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2017; 98:190-195. [PMID: 28025689 DOI: 10.1007/s00128-016-2006-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Accepted: 12/08/2016] [Indexed: 06/06/2023]
Abstract
This study investigated to what extent a single exposure to low doses of ionizing radiation can induce genotoxic damage in irradiated adult zebrafish (Danio rerio) and its non-irradiated F1 progeny. Four groups of adult zebrafish were irradiated with a single dose of X-rays at 0 (control), 100, 500 and 1000 mGy, respectively, and couples of each group were allowed to reproduce following irradiation. Blood of parental fish and whole-body offspring were analysed by the comet assay for detection of DNA damage. The level of DNA damage in irradiated parental fish increased in a radiation dose-dependent manner at day 1 post-irradiation, but returned to the control level thereafter. The level of DNA damage in the progeny was directly correlated with the parental irradiation dose. Results highlight the genotoxic risk of a single exposure to low-dose ionizing radiation in irradiated individuals and also in its non-irradiated progeny.
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Affiliation(s)
- J Lemos
- ICBAS - Institute of Biomedical Sciences, University of Porto, Rua de Jorge Viterbo Ferreira 228, 4050-313, Porto, Portugal
- Nuclear Medicine Department, High Institute for Allied Health Technologies of Porto - Polytechnic Institute of Porto (ESTSP.IPP), Rua Valente Perfeito 322, 4400-330, Vila Nova de Gaia, Portugal
| | - T Neuparth
- CIIMAR/CIMAR - Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Rua dos Bragas 289, 4050-123, Porto, Portugal
| | - M Trigo
- Department of Biology, Faculty of Sciences, University of Porto, Rua do Campo Alegre, 4169-007, Porto, Portugal
| | - P Costa
- Nuclear Medicine Department, High Institute for Allied Health Technologies of Porto - Polytechnic Institute of Porto (ESTSP.IPP), Rua Valente Perfeito 322, 4400-330, Vila Nova de Gaia, Portugal
| | - D Vieira
- Nuclear Medicine Department, High Institute for Allied Health Technologies of Porto - Polytechnic Institute of Porto (ESTSP.IPP), Rua Valente Perfeito 322, 4400-330, Vila Nova de Gaia, Portugal
| | - L Cunha
- IsoPor SA, PO box 4028, 4445, Ermesinde, Portugal
| | - F Ponte
- Radiotherapy Deptartment, Júlio Teixeira SA, Rua Arquitecto Cassiano Barbosa 6, F, Sala 26, 4100-009, Porto, Portugal
| | - P S Costa
- Radiotherapy Deptartment, Júlio Teixeira SA, Rua Arquitecto Cassiano Barbosa 6, F, Sala 26, 4100-009, Porto, Portugal
| | - L F Metello
- Nuclear Medicine Department, High Institute for Allied Health Technologies of Porto - Polytechnic Institute of Porto (ESTSP.IPP), Rua Valente Perfeito 322, 4400-330, Vila Nova de Gaia, Portugal
- IsoPor SA, PO box 4028, 4445, Ermesinde, Portugal
| | - A P Carvalho
- CIIMAR/CIMAR - Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Rua dos Bragas 289, 4050-123, Porto, Portugal.
- Department of Biology, Faculty of Sciences, University of Porto, Rua do Campo Alegre, 4169-007, Porto, Portugal.
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8
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Graupner A, Eide DM, Instanes C, Andersen JM, Brede DA, Dertinger SD, Lind OC, Brandt-Kjelsen A, Bjerke H, Salbu B, Oughton D, Brunborg G, Olsen AK. Gamma radiation at a human relevant low dose rate is genotoxic in mice. Sci Rep 2016; 6:32977. [PMID: 27596356 PMCID: PMC5011728 DOI: 10.1038/srep32977] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Accepted: 08/10/2016] [Indexed: 12/16/2022] Open
Abstract
Even today, 70 years after Hiroshima and accidents like in Chernobyl and Fukushima, we still have limited knowledge about the health effects of low dose rate (LDR) radiation. Despite their human relevance after occupational and accidental exposure, only few animal studies on the genotoxic effects of chronic LDR radiation have been performed. Selenium (Se) is involved in oxidative stress defence, protecting DNA and other biomolecules from reactive oxygen species (ROS). It is hypothesised that Se deficiency, as it occurs in several parts of the world, may aggravate harmful effects of ROS-inducing stressors such as ionising radiation. We performed a study in the newly established LDR-facility Figaro on the combined effects of Se deprivation and LDR γ exposure in DNA repair knockout mice (Ogg1−/−) and control animals (Ogg1+/−). Genotoxic effects were seen after continuous radiation (1.4 mGy/h) for 45 days. Chromosomal damage (micronucleus), phenotypic mutations (Pig-a gene mutation of RBCCD24−) and DNA lesions (single strand breaks/alkali labile sites) were significantly increased in blood cells of irradiated animals, covering three types of genotoxic activity. This study demonstrates that chronic LDR γ radiation is genotoxic in an exposure scenario realistic for humans, supporting the hypothesis that even LDR γ radiation may induce cancer.
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Affiliation(s)
- Anne Graupner
- Department of Chemicals and Radiation, Norwegian Institute of Public Health, Oslo 0403, Norway.,Centre for Environmental Radioactivity (CoE CERAD), Ås 1432, Norway
| | - Dag M Eide
- Department of Chemicals and Radiation, Norwegian Institute of Public Health, Oslo 0403, Norway.,Centre for Environmental Radioactivity (CoE CERAD), Ås 1432, Norway
| | - Christine Instanes
- Department of Chemicals and Radiation, Norwegian Institute of Public Health, Oslo 0403, Norway.,Centre for Environmental Radioactivity (CoE CERAD), Ås 1432, Norway
| | - Jill M Andersen
- Department of Chemicals and Radiation, Norwegian Institute of Public Health, Oslo 0403, Norway.,Centre for Environmental Radioactivity (CoE CERAD), Ås 1432, Norway
| | - Dag A Brede
- Centre for Environmental Radioactivity (CoE CERAD), Ås 1432, Norway.,Department of Environmental Sciences (IMV), Norwegian University of Life Sciences (NMBU), Centre for Environmental Radioactivity (CoE CERAD), Ås 1432, Norway
| | | | - Ole C Lind
- Centre for Environmental Radioactivity (CoE CERAD), Ås 1432, Norway.,Department of Environmental Sciences (IMV), Norwegian University of Life Sciences (NMBU), Centre for Environmental Radioactivity (CoE CERAD), Ås 1432, Norway
| | - Anicke Brandt-Kjelsen
- Department of Environmental Sciences (IMV), Norwegian University of Life Sciences (NMBU), Centre for Environmental Radioactivity (CoE CERAD), Ås 1432, Norway
| | - Hans Bjerke
- Department of Monitoring and Research, Norwegian Radiation Protection Authority, Østerås 1332, Norway
| | - Brit Salbu
- Centre for Environmental Radioactivity (CoE CERAD), Ås 1432, Norway.,Department of Environmental Sciences (IMV), Norwegian University of Life Sciences (NMBU), Centre for Environmental Radioactivity (CoE CERAD), Ås 1432, Norway
| | - Deborah Oughton
- Centre for Environmental Radioactivity (CoE CERAD), Ås 1432, Norway.,Department of Environmental Sciences (IMV), Norwegian University of Life Sciences (NMBU), Centre for Environmental Radioactivity (CoE CERAD), Ås 1432, Norway
| | - Gunnar Brunborg
- Department of Chemicals and Radiation, Norwegian Institute of Public Health, Oslo 0403, Norway.,Centre for Environmental Radioactivity (CoE CERAD), Ås 1432, Norway
| | - Ann K Olsen
- Department of Chemicals and Radiation, Norwegian Institute of Public Health, Oslo 0403, Norway.,Centre for Environmental Radioactivity (CoE CERAD), Ås 1432, Norway
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9
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Han B, Gu J, Zhao L, Guo H, Xie Y, Zhao S, Song X, Han L, Liu L. Factors Affecting the Radiosensitivity of Hexaploid Wheat to γ-Irradiation: Radiosensitivity of Hexaploid Wheat (Triticum aestivum L.) [Corrected]. PLoS One 2016; 11:e0161700. [PMID: 27551965 PMCID: PMC4995049 DOI: 10.1371/journal.pone.0161700] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2016] [Accepted: 08/10/2016] [Indexed: 11/18/2022] Open
Abstract
Understanding the radiosensitivity of plants, an important factor in crop mutation breeding programs, requires a thorough investigation of the factors that contribute to this trait. In this study, we used the highly radiosensitive wheat (Triticum aestivum L.) variety HY1 and J411, a γ-irradiation-insensitive control, which were screened from a natural population, to examine the factors affecting radiosensitivity, including free radical content and total antioxidant capacity, as well as the expression of TaKu70 and TaKu80 (DNA repair-related genes) as measured by real-time PCR. We also investigated the alternative splicing of this gene in the wild-type wheat ecotype by sequence analysis. Free radical contents and total antioxidant capacity significantly increased upon exposure of HY1 wheat to γ-irradiation in a dose-dependent manner. By contrast, in J411, the free radical contents exhibited a similar trend, but the total antioxidant capacity exhibited a downward trend upon increasing γ-irradiation. Additionally, we detected dose-dependent increases in TaKu70 and TaKu80 expression levels in γ-irradiated HY1, while in J411, TaKu70 expression levels increased, followed by a decline. We also detected alternative splicing of TaKu70 mRNA, namely, intron retention, in HY1 but not in J411. Our findings indicate that γ-irradiation induces oxidative stress and DNA damage in hexaploid wheat, resulting in growth retardation of seedlings, and they suggest that TaKu70 may play a causal role in radiosensitivity in HY1. Further studies are required to exploit these factors to improve radiosensitivity in other wheat varieties.
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Affiliation(s)
- Bing Han
- Academy of Life Science, Qingdao Agricultural University, Qingdao, China
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences /National Key Facility for Crop Gene Resources and Genetic Improvement /National Center of Space Mutagenesis for Crop Improvement, Beijing, China
| | - Jiayu Gu
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences /National Key Facility for Crop Gene Resources and Genetic Improvement /National Center of Space Mutagenesis for Crop Improvement, Beijing, China
| | - Linshu Zhao
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences /National Key Facility for Crop Gene Resources and Genetic Improvement /National Center of Space Mutagenesis for Crop Improvement, Beijing, China
| | - Huijun Guo
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences /National Key Facility for Crop Gene Resources and Genetic Improvement /National Center of Space Mutagenesis for Crop Improvement, Beijing, China
| | - Yongdun Xie
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences /National Key Facility for Crop Gene Resources and Genetic Improvement /National Center of Space Mutagenesis for Crop Improvement, Beijing, China
| | - Shirong Zhao
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences /National Key Facility for Crop Gene Resources and Genetic Improvement /National Center of Space Mutagenesis for Crop Improvement, Beijing, China
| | - Xiyun Song
- Academy of Life Science, Qingdao Agricultural University, Qingdao, China
| | - Longzhi Han
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences /National Key Facility for Crop Gene Resources and Genetic Improvement /National Center of Space Mutagenesis for Crop Improvement, Beijing, China
| | - Luxiang Liu
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences /National Key Facility for Crop Gene Resources and Genetic Improvement /National Center of Space Mutagenesis for Crop Improvement, Beijing, China
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10
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Gagnaire B, Cavalié I, Pereira S, Floriani M, Dubourg N, Camilleri V, Adam-Guillermin C. External gamma irradiation-induced effects in early-life stages of zebrafish, Danio rerio. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2015; 169:69-78. [PMID: 26517177 DOI: 10.1016/j.aquatox.2015.10.005] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Revised: 09/04/2015] [Accepted: 10/07/2015] [Indexed: 06/05/2023]
Abstract
In the general context of validation of tools useful for the characterization of ecological risk linked to ionizing radiation, the effects of an external gamma irradiation were studied in zebrafish larvae irradiated for 96 h with two dose rates: 0.8 mGy/d, which is close to the level recommended to protect ecosystems from adverse effects of ionizing radiation (0.24 mGy/d) and a higher dose rate of 570 mGy/d. Several endpoints were investigated, such as mortality, hatching, and some parameters of embryo-larval development, immunotoxicity, apoptosis, genotoxicity, neurotoxicity and histological alterations. Results showed that an exposure to gamma rays induced an acceleration of hatching for both doses and a decrease of yolk bag diameter for the highest dose, which could indicate an increase of global metabolism. AChE activity decreased with the low dose rate of gamma irradiation and alterations were also shown in muscles of irradiated larvae. These results suggest that gamma irradiation can induce damages on larval neurotransmission, which could have repercussions on locomotion. DNA damages, basal ROS production and apoptosis were also induced by irradiation, while ROS stimulation index and EROD biotransformation activity were decreased and gene expression of acetylcholinesterase, choline acetyltransferase, cytochrome p450 and myeloperoxidase increased. These results showed that ionizing radiation induced an oxidative stress conducting to DNA damages. This study characterized further the modes of action of ionizing radiation in fish.
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Affiliation(s)
- B Gagnaire
- Institut de Radioprotection et de Sureté Nucléaire (IRSN), PRP-ENV/SERIS/LECO, Cadarache, Saint-Paul-lez-Durance 13115, France.
| | - I Cavalié
- Institut de Radioprotection et de Sureté Nucléaire (IRSN), PRP-ENV/SERIS/LECO, Cadarache, Saint-Paul-lez-Durance 13115, France
| | - S Pereira
- Neolys Diagnostics, Lyon 69373, France
| | - M Floriani
- Institut de Radioprotection et de Sureté Nucléaire (IRSN), PRP-ENV/SERIS/LECO, Cadarache, Saint-Paul-lez-Durance 13115, France
| | - N Dubourg
- Institut de Radioprotection et de Sureté Nucléaire (IRSN), PRP-ENV/SERIS/LECO, Cadarache, Saint-Paul-lez-Durance 13115, France
| | - V Camilleri
- Institut de Radioprotection et de Sureté Nucléaire (IRSN), PRP-ENV/SERIS/LECO, Cadarache, Saint-Paul-lez-Durance 13115, France
| | - C Adam-Guillermin
- Institut de Radioprotection et de Sureté Nucléaire (IRSN), PRP-ENV/SERIS/LECO, Cadarache, Saint-Paul-lez-Durance 13115, France
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11
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Parisot F, Bourdineaud JP, Plaire D, Adam-Guillermin C, Alonzo F. DNA alterations and effects on growth and reproduction in Daphnia magna during chronic exposure to gamma radiation over three successive generations. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2015; 163:27-36. [PMID: 25840277 DOI: 10.1016/j.aquatox.2015.03.002] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Revised: 02/26/2015] [Accepted: 03/03/2015] [Indexed: 06/04/2023]
Abstract
This study examined chronic effects of external Cs-137 gamma radiation on Daphnia magna exposed over three successive generations (F0, F1 and F2) to environmentally relevant dose rates (ranging from 0.007 to 35.4 mGy h(-1)). Investigated endpoints included survival, growth, reproduction and DNA alterations quantified using random-amplified polymorphic DNA polymerase chain reaction (RAPD-PCR). Results demonstrated that radiation effects on survival, growth and reproduction increased in severity from generation F0 to generation F2. Mortality after 21 days at 35.4 mGy h(-1) increased from 20% in F0 to 30% in F2. Growth was affected by a slight reduction in maximum length at 35.4 mGy h(-1) in F0 and by reductions of 5 and 13% in growth rate, respectively, at 4.70 and 35.4 mGy h(-1) in F2. Reproduction was affected by a reduction of 19% in 21 day-fecundity at 35.4 mGy h(-1) in F0 and by a delay of 1.9 days in brood release as low as 0.070 mGy h(-1) in F2. In parallel, DNA alterations became significant at decreasing dose rates over the course of F0 (from 4.70 mGy h(-1) at hatching to 0.007 mGy h(-1) after ∼21 days) and from F0 to F2 (0.070 mGy h(-1) at hatching to 0.007 mGy h(-1) after ∼21 days), demonstrating their rapid accumulation in F0 daphnids and their transmission to offspring generations. Transiently more efficient DNA repair leading to some recovery at the organism level was suggested in F1, with no effect on survival, a slight reduction of 12% in 21 day-fecundity at 35.4 mGy h(-1) and DNA alterations significant at highest dose rates only. The study improved our understanding of long term responses to low doses of radiation at the molecular and organismic levels in a non-human species for a better radioprotection of aquatic ecosystems.
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Affiliation(s)
- Florian Parisot
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PRP-ENV/SERIS/LECO, Cadarache, St Paul-lez-Durance 13115, France
| | - Jean-Paul Bourdineaud
- UMR 5805 EPOC - OASU, Station marine d'Arcachon, Université Bordeaux 1, Arcachon 33120, France
| | - Delphine Plaire
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PRP-ENV/SERIS/LECO, Cadarache, St Paul-lez-Durance 13115, France
| | - Christelle Adam-Guillermin
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PRP-ENV/SERIS/LECO, Cadarache, St Paul-lez-Durance 13115, France
| | - Frédéric Alonzo
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PRP-ENV/SERIS/LECO, Cadarache, St Paul-lez-Durance 13115, France.
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12
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Won EJ, Lee JS. Gamma radiation induces growth retardation, impaired egg production, and oxidative stress in the marine copepod Paracyclopina nana. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2014; 150:17-26. [PMID: 24632311 DOI: 10.1016/j.aquatox.2014.02.010] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2013] [Revised: 02/16/2014] [Accepted: 02/18/2014] [Indexed: 06/03/2023]
Abstract
Accidental nuclear radioisotope release into the ocean from nuclear power plants is of concern due to ecological and health risks. In this study, we used the marine copepod Paracyclopina nana to examine the effects of radioisotopes on marine organisms upon gamma radiation, and to measure the effects on growth and fecundity, which affect population and community structure. Upon gamma radiation, mortality (LD50 - 96 h=172 Gy) in P. nana was significantly increased in a dose-dependent manner in ovigerous P. nana females. For developmental impairment of gamma-irradiated nauplii, we observed growth retardation; in over 30 Gy-irradiated groups, offspring did not grow to adults. Particularly, over 50 Gy-irradiated ovigerous P. nana females did not have normal bilateral egg sacs, and their offspring did not develop normally to adulthood. Additionally, at over 30 Gy, we found dose-dependent increases in oxidative levels with elevated antioxidant enzyme activities and DNA repair activities. These findings indicate that gamma radiation can induce oxidative stress and DNA damage with growth retardation and impaired reproduction.
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Affiliation(s)
- Eun-Ji Won
- Department of Biological Sciences, College of Natural Sciences, Sungkyunkwan University, Suwon 440-746, South Korea
| | - Jae-Seong Lee
- Department of Biological Sciences, College of Natural Sciences, Sungkyunkwan University, Suwon 440-746, South Korea.
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