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Genotoxicity of Fishes

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https://www.readbyqxmd.com/read/28091988/genotoxicity-and-cytotoxicity-reduction-of-the-polluted-urban-river-after-ecological-restoration-a-field-scale-study-of-jialu-river-in-northern-china
#1
Jie Sun, Rui Zhang, Long Qin, Haixiao Zhu, Yu Huang, Yingang Xue, Shuqing An, Xianchuan Xie, Aimin Li
To further treat the reclaimed municipal wastewater and rehabilitate the aquatic ecosystem of polluted urban rivers, an 18.5-km field-scale ecological restoration project was constructed along Jialu River, a polluted urban river which receives only reclaimed municipal wastewater from Zhengzhou City without natural upland water dilution. This study investigated the potential efficiency of water quality improvement, as well as genotoxicity and cytotoxicity reduction along the ecological restoration project of this polluted urban river...
January 13, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28055311/immunotoxicity-of-mercury-pathological-and-toxicological-effects
#2
Faheem Maqbool, Kamal Niaz, Fatima Ismail Hassan, Fazlullah Khan, Mohammad Abdollahi
Mercury (Hg) is toxic and hazardous metal that causes natural disasters in the earth's crust. Exposure to Hg occurs via various routes; like oral (fish), inhalation, dental amalgams, and skin from cosmetics. In this review, we have discussed the sources of Hg and its potential for causing toxicity in humans. In addition, it's bio-chemical cycling in the environment; its systemic, immunotoxic, genotoxic/carcinogenic and teratogenic health effects; and the dietary influences; as well as the important considerations in risk assessment and management of Hg poisoning have been discussed in detail...
January 5, 2017: Journal of Environmental Science and Health. Part C, Environmental Carcinogenesis & Ecotoxicology Reviews
https://www.readbyqxmd.com/read/28040614/recommendation-for-a-test-battery-for-the-ecotoxicological-evaluation-of-the-environmental-safety-of-construction-products
#3
Stefan Gartiser, Ines Heisterkamp, Ute Schoknecht, Nicole Bandow, N Michael Burkhardt, Monika Ratte, Outi Ilvonen
The European Construction Products Regulation allows Member States to adopt rules for evaluating the environmental impact of their buildings. The aim of the project was to develop recommendations for a test battery for the ecotoxicological assessment of the environmental impact of construction products for outdoor use and contribute to the European harmonization of test methods. From a shortlist of 39 products 20 products were included in the ecotoxicological testing program. Monolithic and plate-like construction products were eluted in the Dynamic Surface Leaching test (DSLT) in accordance with CEN/TS 16637-2, granular products were eluted in a one stage batch test in accordance with DIN EN 12457-1...
December 23, 2016: Chemosphere
https://www.readbyqxmd.com/read/28038348/i-biomarker-quantification-in-fish-exposed-to-crude-oil-as-input-to-species-sensitivity-distributions-and-threshold-values-for-environmental-monitoring
#4
Steinar Sanni, Carina Björkblom, Henrik Jonsson, Brit F Godal, Birgitta Liewenborg, Emily Lyng, Daniela M Pampanin
The aim of this study was to determine a suitable set of biomarker based methods for environmental monitoring in sub-arctic and temperate offshore areas using scientific knowledge on the sensitivity of fish species to dispersed crude oil. Threshold values for environmental monitoring and risk assessment were obtained based on a quantitative comparison of biomarker responses. Turbot, halibut, salmon and sprat were exposed for up to 8 weeks to five different sub-lethal concentrations of dispersed crude oil. Biomarkers assessing PAH metabolites, oxidative stress, detoxification system I activity, genotoxicity, immunotoxicity, endocrine disruption, general cellular stress and histological changes were measured...
December 20, 2016: Marine Environmental Research
https://www.readbyqxmd.com/read/28033099/an-alternative-approach-to-studying-the-effects-of-zno-nanoparticles-in-cultured-human-lymphocytes-combining-electrochemistry-and-genotoxicity-tests
#5
Gina Branica, Marin Mladinić, Dario Omanović, Davor Želježić
Nanoparticle use has increased radically raising concern about possible adverse effects in humans. Zinc oxide nanoparticles (ZnO NPs) are among the most common nanomaterials in consumer and medical products. Several studies indicate problems with their safe use. The aim of our study was to see at which levels ZnO NPs start to produce adverse cytogenetic effects in human lymphocytes as an early attempt toward establishing safety limits for ZnO NP exposure in humans. We assessed the genotoxic effects of low ZnO NP concentrations (1...
December 1, 2016: Arhiv za Higijenu Rada i Toksikologiju
https://www.readbyqxmd.com/read/28025689/single-low-dose-ionizing-radiation-induces-genotoxicity-in-adult-zebrafish-and-its-non-irradiated-progeny
#6
J Lemos, T Neuparth, M Trigo, P Costa, D Vieira, L Cunha, F Ponte, P S Costa, L F Metello, A P Carvalho
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...
December 26, 2016: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28024242/aneugenicity-and-clastogenicity-in-freshwater-fish-oreochromis-niloticus-exposed-to-incipient-safe-concentration-of-tannery-effluent
#7
Abel Weldetinsae, Mekibib Dawit, Abebe Getahun, H S Patil, Esayas Alemayehu, Melaku Gizaw, Moa Abate, Daniel Abera
Conventional effluent bioassays mostly rely on overt responses or endpoints such as apical and Darwinian fitness. Beyond the empirical observation, laboratory toxicity testing needs to rely on effective detection of prognostic biomarkers such as genotoxicity. Indeed, characterization of tannery effluent requires slotting in of genotoxic responses in whole effluent toxicity testing procedures. Hence, the prime objective of the present experimental investigation is to apply the technique of biological assay as a tool of toxicity testing to evaluate the induction of micronuclei (MN) in peripheral erythrocytes, and exfoliated cells of gill and kidney of O...
December 23, 2016: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/27956245/neurotoxins-in-a-water-supply-reservoir-an-alert-to-environmental-and-human-health
#8
Sabrina Loise de Morais Calado, Juliana Wojciechowski, Gustavo Souza Santos, Valéria Freitas de Magalhães, André Andrian Padial, Marta Margarete Cestari, Helena Cristina da Silva de Assis
Reservoirs are important source of power generation, recreation, and water supply. Nevertheless, human activities have favored the bloom of toxic cyanobacteria in many reservoirs, which has resulted in environmental, social, and economic problems. This study aims to evaluate the water quality of a reservoir in South Brazil through the analysis of cyanobacteria and cyanotoxins PSTs (Paralytic Shellfish Toxins) and biomarkers of environmental contamination in fish. For this purpose, water samples and fish (Geophagus brasiliensis) (Perciformes: Cichlidae) were collected from September 2013 to May 2014...
December 10, 2016: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/27940135/impaired-antioxidant-gene-expression-by-pesticide-residues-and-its-relation-with-other-cellular-biomarkers-in-nile-tilapia-oreochromis-niloticus-from-lake-burullus
#9
Abeer F El Nahas, Mohamed A S Abdel-Razek, Nashwa M Helmy, Shawky Mahmoud, Haneen A Ghazy
Organochlorines and Organophosphorus are the most commonly used pesticides. These pesticides constitute a considerable contaminating threat due to their excessive agricultural usage which in turn contaminates the aquatic system through agricultural drainage. The aim of this study was to evaluate water and tissue residues of both pesticides in O. niloticus obtained from three different sections in Lake Burullus, Egypt. Assessment of relative change in mRNA levels of GST and Vtg (oxidative stress indicator) was done and its relation with other cellular biomarkers including apoptosis, which is assessed by Cellular apoptosis susceptibility transcript level (CAS), comet assay and micronucleus assays (genotoxicity indicator)...
March 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/27836175/cytogenotoxicity-screening-of-source-water-wastewater-and-treated-water-of-drinking-water-treatment-plants-using-two-in%C3%A2-vivo-test-systems-allium-cepa-root-based-and-nile-tilapia-erythrocyte-based-tests
#10
Chamini K Hemachandra, Asoka Pathiratne
Biological effect directed in vivo tests with model organisms are useful in assessing potential health risks associated with chemical contaminations in surface waters. This study examined the applicability of two in vivo test systems viz. plant, Allium cepa root based tests and fish, Oreochromis niloticus erythrocyte based tests for screening cytogenotoxic potential of raw source water, water treatment waste (effluents) and treated water of drinking water treatment plants (DWTPs) using two DWTPs associated with a major river in Sri Lanka...
January 1, 2017: Water Research
https://www.readbyqxmd.com/read/27833047/assessment-of-dna-damage-in-ardea-cinerea-and-ciconia-ciconia-a-5-year-study-in-portuguese-birds-retrieved-for-rehabilitation
#11
Cátia S A Santos, Ricardo Brandão, Marta S Monteiro, Ana C Bastos, Amadeu M V M Soares, Susana Loureiro
Over the past decades, the presence of micronucleated blood cells has been used to detect genotoxic effects of xenobiotics in fish, amphibians and birds. This study assessed the frequency of micronuclei (MN) and other nuclear abnormalities in erythrocytes of individuals of Ardea cinerea and Ciconia ciconia retrieved for rehabilitation in order to evaluate the influence of age, temporal and spatial factors on the occurrence of DNA damage in Portuguese wild birds. Blood smears from 65 birds with different life-history backgrounds (e...
February 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/27801952/human-t-lymphocytes-bioactivate-heterocyclic-aromatic-amines-by-forming-dna-adducts
#12
Medjda Bellamri, Ludovic Le Hegarat, Laurent Vernhet, Georges Baffet, Robert J Turesky, Sophie Langouët
Heterocyclic aromatic amines (HAA) are formed in cooked meat, poultry and fish but also arise in tobacco smoke and exhaust gases. HAA are potential human carcinogens, which require metabolic activation to exert their genotoxicity. Human tissues can bioactivate HAA to produce reactive intermediates that bind to DNA. HAA DNA adduct formation occurs in human hepatocytes; however, the potential of HAA to form DNA adducts has not been investigated in human T lymphocytes. In this study, we investigated the ability of human T lymphocytes activated with PMA/Ionomycin or CD3/CD28 to express functional CYP1 activity and bioactivate three major HAA: 2-amino-1-methyl-6-phenylimidazo[4,5-b]pyridine (PhIP), 2-amino-3,8-dimethylimidazo[4,5-f]quinoxaline (MeIQx), and 2-amino-9H-pyrido[2,3-b]indole (AαC) to form DNA adducts...
December 2016: Environmental and Molecular Mutagenesis
https://www.readbyqxmd.com/read/27801481/genotoxic-and-mutagenic-effects-of-polluted-surface-water-in-the-midwestern-region-of-brazil-using-animal-and-plant-bioassays
#13
Priscila Leocádia Rosa Dourado, Monyque Palagano da Rocha, Liriana Mara Roveda, Jorge Luiz Raposo, Liliam Sílvia Cândido, Claudia Andréa Lima Cardoso, Maria Aparecida Marin Morales, Kelly Mari Pires de Oliveira, Alexeia Barufatti Grisolia
This study aimed to evaluate DNA damage in animal and plant cells exposed to water from the Água Boa stream (Dourados, Mato Grosso do Sul, Brazil) by using bioassays, and to identify the chemical compounds in the water to determine the water quality in the area. Through the cytotoxicity bioassay with Allium cepa, using micronucleus test, and comet assay, using Astyanax altiparanae fish, the results indicated that biological samples were genetically altered. Micronuclei were observed in erythrocytes of A. altiparanae after exposure to water from locations close to industrial waste discharge...
October 31, 2016: Genetics and Molecular Biology
https://www.readbyqxmd.com/read/27767391/assessment-of-genotoxic-mutagenic-and-recombinogenic-potential-of-water-resources-in-the-parana%C3%A3-ba-river-basin-of-brazil-a-case-study
#14
Edimar Olegário de Campos Júnior, Rosiane Gomes da Silva Oliveira, Boscolli Barbosa Pereira, Henrique Nazareth Souto, Carlos Fernando Campos, Júlio Cesar Nepomuceno, Sandra Morelli
Exposure to certain pollutants induces a series of alterations in deoxyribonucleic acid (DNA) that may result in genotoxic/mutagenic effects in exposed individuals. The present study aimed to monitor genotoxic, mutagenic, and recombinogenic potential and consequently water quality in two streams in the Paranaíba River basin in the state of Minas Gerais, Brazil, using two bioindicator fish (Rhamdia quelen and Geophagus brasiliensis). The micronucleus (MN) test and somatic recombination and mutation test (SMART) were employed to assess DNA damage...
2016: Journal of Toxicology and Environmental Health. Part A
https://www.readbyqxmd.com/read/27742361/evidences-of-dna-and-chromosomal-damage-induced-by-the-mancozeb-based-fungicide-mancozan-%C3%A2-in-fish-anguilla-anguilla-l
#15
Ana Marques, Andreia Rego, Sofia Guilherme, Isabel Gaivão, Maria Ana Santos, Mário Pacheco
The formulation Mancozan(®), containing mancozeb as active ingredient, is among the most widely used fungicides. Although mancozeb has been detected in surface waters, studies addressing the genotoxic risk to fish arising from the use of this formulation, testing environmentally realistic concentrations, are absent from the literature. Hence, this work aimed to investigate the DNA and chromosome damaging potential of Mancozan(®) (0.29 and 2.9μgL(-1)) in the European eel (Anguilla anguilla L.), after a short-term exposure (3days), through the adoption of the comet and the erythrocytic nuclear abnormality (ENA) assays...
October 2016: Pesticide Biochemistry and Physiology
https://www.readbyqxmd.com/read/27718769/podophyllum-hexandrum-ameliorates-endosulfan-induced-genotoxicity-and-mutagenicity-in-freshwater-cyprinid-fish-crucian-carp
#16
Sabzar Ahmad Dar, Abdul Rehman Yousuf, Masood-Ul-Hassan Balkhi, Bashir Ahmad Ganai, Mudasir Tantry, Farooz Ahmad Bhat
CONTEXT: Medicinal plants continue to act as a repository for novel drug leads with novel mechanisms of action. Podophyllum hexandrum Royale (Berberideceae) treats diverse conditions in folk medicine. OBJECTIVE: The antimutagenic potential of P. hexandrum was evaluated against endosulfan-induced clastogenicity in a piscine model by cytogenetic endpoints. MATERIALS AND METHODS: Podophyllum hexandrum rhizomes were subjected to successive solvent extraction...
December 2017: Pharmaceutical Biology
https://www.readbyqxmd.com/read/27667680/acute-exposure-to-a-quinalphos-containing-insecticide-convoy-causes-genetic-damage-and-nuclear-changes-in-peripheral-erythrocytes-of-silver-barb-barbonymus-gonionotus
#17
Islam M Sadiqul, Zannatul Ferdous, Md Tanvir Ahmed Nannu, Golam Mohammod Mostakim, Md Khalilur Rahman
The present study was aimed to assess the genotoxic effect in fish caused by convoy, an insecticide commercial formulation containing quinalphos, present in the aquatic waterbody. For this purpose a freshwater teleost, silver barb was exposed to sublethal concentrations (25% and 50% of LC50) of convoy and erythrocytic cellular abnormalities (ECA) and erythrocytic nuclear abnormalities (ENA) tests were performed in addition to the commonly used micronucleus (MN) assay using peripheral erythrocytes and DNA contents in the different tissues after 1, 24, 36, 48, and 72 h of exposures...
December 2016: Environmental Pollution
https://www.readbyqxmd.com/read/27631093/evaluation-of-genotoxic-pressure-along-the-sava-river
#18
Stoimir Kolarević, Mustafa Aborgiba, Margareta Kračun-Kolarević, Jovana Kostić, Predrag Simonović, Vladica Simić, Aleksandra Milošković, Georg Reischer, Andreas Farnleitner, Zoran Gačić, Radmila Milačič, Tea Zuliani, Janja Vidmar, Marija Pergal, Marina Piria, Momir Paunović, Branka Vuković-Gačić
In this study we have performed a comprehensive genotoxicological survey along the 900 rkm of the Sava River. In total, 12 sites were chosen in compliance with the goals of GLOBAQUA project dealing with the effects of multiple stressors on biodiversity and functioning of aquatic ecosystems. The genotoxic potential was assessed using a complex battery of bioassays performed in prokaryotes and aquatic eukaryotes (freshwater fish). Battery comprised evaluation of mutagenicity by SOS/umuC test in Salmonella typhimurium TA1535/pSK1002...
2016: PloS One
https://www.readbyqxmd.com/read/27614909/the-tradescantia-micronucleus-assay-is-a-highly-sensitive-tool-for-the-detection-of-low-levels-of-radioactivity-in-environmental-samples
#19
Miroslav Mišík, Georg Krupitza, Katarina Mišíková, Karol Mičieta, Armen Nersesyan, Michael Kundi, Siegfried Knasmueller
Environmental contamination with radioactive materials of geogenic and anthropogenic origin is a global problem. A variety of mutagenicity test procedures has been developed which enable the detection of DNA damage caused by ionizing radiation which plays a key role in the adverse effects caused by radioisotopes. In the present study, we investigated the usefulness of the Tradescantia micronucleus test (the most widely used plant based genotoxicity bioassay) for the detection of genetic damage caused by environmental samples and a human artifact (ceramic plate) which contained radioactive elements...
December 2016: Environmental Pollution
https://www.readbyqxmd.com/read/27613375/genetic-toxicity-assessment-of-engineered-nanoparticles-using-a-3d-in-vitro-skin-model-epiderm%C3%A2
#20
John W Wills, Nicole Hondow, Adam D Thomas, Katherine E Chapman, David Fish, Thierry G Maffeis, Mark W Penny, Richard A Brown, Gareth J S Jenkins, Andy P Brown, Paul A White, Shareen H Doak
BACKGROUND: The rapid production and incorporation of engineered nanomaterials into consumer products alongside research suggesting nanomaterials can cause cell death and DNA damage (genotoxicity) makes in vitro assays desirable for nanosafety screening. However, conflicting outcomes are often observed when in vitro and in vivo study results are compared, suggesting more physiologically representative in vitro models are required to minimise reliance on animal testing. METHOD: BASF Levasil® silica nanoparticles (16 and 85 nm) were used to adapt the 3D reconstructed skin micronucleus (RSMN) assay for nanomaterials administered topically or into the growth medium...
September 9, 2016: Particle and Fibre Toxicology
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