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Arslan E, Güngördü A. Subacute toxicity and endocrine-disrupting effects of Fe 2O 3, ZnO, and CeO 2 nanoparticles on amphibian metamorphosis. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:4174-4195. [PMID: 38097842 DOI: 10.1007/s11356-023-31441-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2023] [Accepted: 12/05/2023] [Indexed: 01/19/2024]
Abstract
This study evaluated the potential toxic and endocrine-disrupting effects of sublethal concentrations of Fe2O3, CeO2 and ZnO nanoparticles (NPs) on amphibian metamorphosis. Tadpoles were exposed to several NPs concentrations, reaching a maximum of 1000 µg/L, for up to 21 days according to the amphibian metamorphosis assay (AMA). Some standard morphological parameters, such as developmental stage (DS), hind limb length (HLL), snout-to-vent length (SVL), wet body weight (WBW), and as well as post-exposure lethality were recorded in exposed organisms on days 7 and 21 of the bioassay. Furthermore, triiodothyronine (T3), thyroxine (T4) and malondialdehyde (MDA) levels and the activities of glutathione S-transferases (GST), glutathione reductase (GR), catalase (CAT), carboxylesterase (CaE), and acetylcholinesterase (AChE) were determined in exposed tadpoles as biomarkers. The results indicate that short-term exposure to Fe2O3 NPs leads to toxic effects, both exposure periods cause toxic effects and growth inhibition for ZnO NPs, while short-term exposure to CeO2 NPs results in toxic effects and long-term exposure causes endocrine-disrupting effects. The responses observed after exposure to the tested NPs during amphibian metamorphosis suggest that they may have ecotoxicological effects and their effects should be monitored through field studies.
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Affiliation(s)
- Eren Arslan
- Laboratory of Environmental Toxicology, Department of Biology, Faculty of Arts and Science, Inonu University, 44280, Malatya, Turkey
| | - Abbas Güngördü
- Laboratory of Environmental Toxicology, Department of Biology, Faculty of Arts and Science, Inonu University, 44280, Malatya, Turkey.
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Bonfanti P, Colombo A, Saibene M, Fiandra L, Armenia I, Gamberoni F, Gornati R, Bernardini G, Mantecca P. Iron nanoparticle bio-interactions evaluated in Xenopus laevis embryos, a model for studying the safety of ingested nanoparticles. Nanotoxicology 2019; 14:196-213. [DOI: 10.1080/17435390.2019.1685695] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Patrizia Bonfanti
- Department of Earth and Environmental Sciences, Research Centre POLARIS, University of Milano-Bicocca, Milano, Italy
| | - Anita Colombo
- Department of Earth and Environmental Sciences, Research Centre POLARIS, University of Milano-Bicocca, Milano, Italy
| | - Melissa Saibene
- Department of Earth and Environmental Sciences, Research Centre POLARIS, University of Milano-Bicocca, Milano, Italy
| | - Luisa Fiandra
- Department of Earth and Environmental Sciences, Research Centre POLARIS, University of Milano-Bicocca, Milano, Italy
| | - Ilaria Armenia
- Department of Biotechnology and Life Sciences, University of Insubria, Varese, Italy
| | - Federica Gamberoni
- Department of Biotechnology and Life Sciences, University of Insubria, Varese, Italy
| | - Rosalba Gornati
- Department of Biotechnology and Life Sciences, University of Insubria, Varese, Italy
| | - Giovanni Bernardini
- Department of Biotechnology and Life Sciences, University of Insubria, Varese, Italy
| | - Paride Mantecca
- Department of Earth and Environmental Sciences, Research Centre POLARIS, University of Milano-Bicocca, Milano, Italy
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Tomani JCD, Gainkam LOT, Nshutiyayesu S, Mukazayire MJ, Ribeiro SO, Stevigny C, Frederich M, Muganga R, Souopgui J. An ethnobotanical survey and inhibitory effects on NLRP3 inflammasomes/Caspase-1 of herbal recipes' extracts traditionally used in Rwanda for asthma treatment. JOURNAL OF ETHNOPHARMACOLOGY 2018; 227:29-40. [PMID: 30118837 DOI: 10.1016/j.jep.2018.08.016] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Revised: 08/10/2018] [Accepted: 08/13/2018] [Indexed: 06/08/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Respiratory diseases and asthma, in particular, are nowadays a global health problem. In Rwanda, some traditional healers claim to treat asthma with plant-based recipes, though there is no scientific proof so far. AIM OF THE STUDY Our study aimed at evaluating the toxicity and the anti-inflammatory effect of plant recipes used in Rwanda against asthma in order to select potential candidates for further characterization of the active compounds. MATERIALS AND METHODS Water (aqueous) and methanol-dichloromethane (organic) extracts from selected folkloric recipes were submitted for toxicity test on THP-1 derived macrophages using CellTiter-Glo Luminescent Cell Viability Assay. The evaluation of the anti-inflammatory effect of the plant extracts was carried out using the Caspase-Glo 1 Inflammasome assay on THP-1 -derived macrophages. RESULTS Most of both organic and aqueous extract showed more than 95% of cell viability up to 200 µg/ml, except for R03Cn organic extract that inhibited 25% of the cell viability. Plant extracts inhibited caspase-1 activation in THP-1 derived macrophages in a dose-dependent manner. Four extracts (R03Cn and R07Kn aqueous extracts, R10MK and R19Sz organic extracts) strongly downregulated the activation of caspase-1 (more than 70% at 50 µg/ml). In general, organic extracts exhibited better caspase-1 inhibitory effects than their aqueous counterparts. CONCLUSIONS The inhibition of inflammasome/caspase-1 is one of key mechanisms of action in asthma. Some traditional recipes are active on this mechanism and are thus strong candidates for the treatment of asthma and other inflammasome-mediated diseases. Further investigations are needed to characterize active molecules.
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Affiliation(s)
- Jean Claude Didelot Tomani
- University of Rwanda, College of Medicine and Health Sciences, School of Medicine and Pharmacy, Kigali, Rwanda; Université Libre de Bruxelles, Institute for Molecular Biology and Medicine, Laboratory of Embryology and Biotechnology, Gosselies, Belgium
| | - Lea Olive Tchouate Gainkam
- Université Libre de Bruxelles, Institute for Molecular Biology and Medicine, Laboratory of Embryology and Biotechnology, Gosselies, Belgium
| | - Samuel Nshutiyayesu
- University of Rwanda, College of Science and Technology, School of Science, Department of Biology, Huye, Rwanda
| | - Marie Jeanne Mukazayire
- National Industrial Research and Development Agency, Pharmaceutical and Chemical Industries Division, Huye, Rwanda
| | - Sofia Oliveira Ribeiro
- Université Libre de Bruxelles, Faculty of Pharmacy, RD3-Pharmacognosy, Bioanalysis and Drug Discovery Unit, Campus Plaine CP 205/9, 1050 Brussels, Belgium
| | - Caroline Stevigny
- Université Libre de Bruxelles, Faculty of Pharmacy, RD3-Pharmacognosy, Bioanalysis and Drug Discovery Unit, Campus Plaine CP 205/9, 1050 Brussels, Belgium
| | - Michel Frederich
- University of Liège, Centre for Interdisciplinary Research on Medicines (CIRM), Laboratory of Pharmacognosy, Liège, Belgium
| | - Raymond Muganga
- University of Rwanda, College of Medicine and Health Sciences, School of Medicine and Pharmacy, Kigali, Rwanda
| | - Jacob Souopgui
- Université Libre de Bruxelles, Institute for Molecular Biology and Medicine, Laboratory of Embryology and Biotechnology, Gosselies, Belgium.
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Cardoso-Vera JD, Islas-Flores H, SanJuan-Reyes N, Montero-Castro EI, Galar-Martínez M, García-Medina S, Elizalde-Velázquez A, Dublán-García O, Gómez-Oliván LM. Comparative study of diclofenac-induced embryotoxicity and teratogenesis in Xenopus laevis and Lithobates catesbeianus, using the frog embryo teratogenesis assay: Xenopus (FETAX). THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 574:467-475. [PMID: 27644024 DOI: 10.1016/j.scitotenv.2016.09.095] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2016] [Revised: 09/12/2016] [Accepted: 09/12/2016] [Indexed: 06/06/2023]
Abstract
Water is an increasingly deteriorated, limited natural resource due to population increase and industrialization. Also, the widespread use of pharmaceuticals in modern society leads to their presence in domestic, hospital and industrial effluents. Due to their analgesic properties, some of the most commonly used pharmaceuticals are nonsteroidal anti-inflammatory drugs (NSAIDs). High concentrations of one these products, diclofenac (DCF), have been detected in effluents and water bodies of different countries, including Mexico. Diverse studies show that trace amounts (ngL-1 to μgL-1) of this compound induce toxicity on aquatic organisms such as algae, microcrustaceans and fish. However, studies on its potential toxicity during development in species of commercial interest such as the American bullfrog Lithobates catesbeianus are scarce. The present study aimed to evaluate DCF-induced teratogenesis and embryotoxicity in Xenopus laevis and L. catesbeianus, a species marketed as a nutritional meat source in Mexico, using the frog embryo teratogenesis assay: Xenopus (FETAX). Oocytes in mid-blastula transition were exposed for 96h to 1, 4, 8, 16, 32 and 62.5mgDCFL-1. The criteria evaluated were mortality, malformation and growth inhibition. The teratogenic index was 4.2 in L. catesbeianus, three-fold higher than the reference limit (1.5), and 3.9 in X. laevis. Diclofenac induced diverse malformations in both species, the most frequent of these being axial malformations in the tail and notochord, edema and stunted growth. Results indicate that DCF is a potentially teratogenic compound and is toxic during development in X. laevis and L. catesbeianus, a species which, due to its sensitivity, can be used to evaluate the toxicity of pharmaceutical products, using FETAX.
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Affiliation(s)
- Jesús Daniel Cardoso-Vera
- Laboratorio de Toxicología Ambiental, Facultad de Química, Universidad Autónoma del Estado de México, Paseo Colón intersección Paseo Tollocan s/n. Col. Residencial Colón, 50120 Toluca, Estado de México, Mexico
| | - Hariz Islas-Flores
- Laboratorio de Toxicología Ambiental, Facultad de Química, Universidad Autónoma del Estado de México, Paseo Colón intersección Paseo Tollocan s/n. Col. Residencial Colón, 50120 Toluca, Estado de México, Mexico.
| | - Nely SanJuan-Reyes
- Laboratorio de Toxicología Ambiental, Facultad de Química, Universidad Autónoma del Estado de México, Paseo Colón intersección Paseo Tollocan s/n. Col. Residencial Colón, 50120 Toluca, Estado de México, Mexico
| | - Elena Irabella Montero-Castro
- Laboratorio de Toxicología Ambiental, Facultad de Química, Universidad Autónoma del Estado de México, Paseo Colón intersección Paseo Tollocan s/n. Col. Residencial Colón, 50120 Toluca, Estado de México, Mexico
| | - Marcela Galar-Martínez
- Laboratorio de Toxicología Acuática, Departamento de Farmacia, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Unidad Profesional Adolfo López Mateos, Av. Wilfrido Massieu s/n y Cerrada de Manuel Stampa, Col. Industrial Vallejo, C.P. 007700 México, D.F., Mexico
| | - Sandra García-Medina
- Laboratorio de Toxicología Acuática, Departamento de Farmacia, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Unidad Profesional Adolfo López Mateos, Av. Wilfrido Massieu s/n y Cerrada de Manuel Stampa, Col. Industrial Vallejo, C.P. 007700 México, D.F., Mexico
| | - Armando Elizalde-Velázquez
- Laboratorio de Toxicología Ambiental, Facultad de Química, Universidad Autónoma del Estado de México, Paseo Colón intersección Paseo Tollocan s/n. Col. Residencial Colón, 50120 Toluca, Estado de México, Mexico
| | - Octavio Dublán-García
- Laboratorio de Toxicología Ambiental, Facultad de Química, Universidad Autónoma del Estado de México, Paseo Colón intersección Paseo Tollocan s/n. Col. Residencial Colón, 50120 Toluca, Estado de México, Mexico
| | - Leobardo Manuel Gómez-Oliván
- Laboratorio de Toxicología Ambiental, Facultad de Química, Universidad Autónoma del Estado de México, Paseo Colón intersección Paseo Tollocan s/n. Col. Residencial Colón, 50120 Toluca, Estado de México, Mexico.
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Boga A, Sertdemir Y, Dogan A. Evaluating the teratogenicity of the selective ß3-adrenoceptor agonist, CL 316.243 hydrate by employing FETAX (frog embryo teratogenesis assay). Drug Chem Toxicol 2016; 40:7-12. [PMID: 27063898 DOI: 10.3109/01480545.2016.1165244] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
In this study, the frog embryo teratogenesis assay (FETAX - Xenopus) technique was employed to evaluate the potential teratogenicity of the selective ß-adrenoceptor (AR) agonist, CL 316.243. In this context, CL 316.243 was applied to the South African clawed frog (Xenopus laevis) embryos. The media containing the CL 316.24-exposed embryos were monitored and changed/replaced once every 24 hours. Using FETAX, we determined the minimum concentrations to inhibit growth (MCIG) for CL 316.243. The 96-hour no observable adverse effect concentration (NOAEC), the 96-hour lowest observable adverse effect concentration (LOAEC), the 96-hour EC50 (malformation) and the 96-hour LC50 (lethal concentration) for mortality and malformation could not be determined because the used concentrations did not affect viability or the presence of abnormalities. On the other hand, the MCIG of CL 316.243 was determined as 1 mg/L. Our results demonstrated that CL 316.243 administration was associated with no of teratogenic and toxic effects. However, from first concentration we used (1 to 5 mg/L) length of embryos reduced significantly (p < 0.001) when compared to control of Xenopus embryos. Further studies should be conducted with different concentrations in order to investigate the optimal concentrations for treating preterm labor with these substances.
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Affiliation(s)
- Ayper Boga
- a Department of Medical Physiology , University of Cukurova , Balcalı , Turkey and
| | - Yasar Sertdemir
- b Department of Biostatistics , Faculty of Medicine, University of Cukurova , Balcalı , Turkey
| | - Ayse Dogan
- a Department of Medical Physiology , University of Cukurova , Balcalı , Turkey and
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Boğa Pekmezekmek A, Binokay US, Seçilmiş MA, Kumcu E, Şimşek E, Akillioğlu K, Sertdemir Y, Özaykan B. Evaluating the Teratogenicity of Ritodrine and Nifedipine using a Frog Embryo Teratogenesis assay (FETAX). Drug Chem Toxicol 2014; 38:254-65. [DOI: 10.3109/01480545.2014.947423] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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de Lapuente J, González-Linares J, Pique E, Borràs M. Ecotoxicological impact of MSW landfills: assessment of teratogenic effects by means of an adapted FETAX assay. ECOTOXICOLOGY (LONDON, ENGLAND) 2014; 23:102-106. [PMID: 24282072 DOI: 10.1007/s10646-013-1155-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 11/12/2013] [Indexed: 06/02/2023]
Abstract
The introduction of chemical products into the environment can cause long-term effects on the ecosystems. Increasing efforts are being made to determine the extent of contamination in particularly affected areas using diverse methods to assess the ecotoxicological impact. We used a modified Frog Embrio Toxicity Assay-Xenopus method to determine the extent of toxicological load in different sample soils obtained near three municipal solid waste landfills in Catalonia (Spain). The results show that the Garraf landfill facility produces more embryotoxic damage to the surroundings, than the others ones: Can Mata landfill and Montferrer-Castellbó landfill. The aim of this work is to demonstrate how different management of complex sources of contamination as the controlled dumping sites can modulate the presence of toxics in the environment and their effects and through this, help determine the safer way to treat these wastes. To this effect some conceptual modifications have been made on the established American Society for Testing and Materials protocol. The validity of the new model, both as to model of calculation as to protocol, has been demonstrated in three different sites with complex sources of contamination.
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Affiliation(s)
- J de Lapuente
- Experimental Toxicology and Ecotoxicology Unit (CERETOX), Barcelona Science Park, Baldiri i Reixac 10-12, 08028, Barcelona, Spain,
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8
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Güngördü A, Sireci N, Küçükbay H, Birhanli A, Ozmen M. Evaluation of in vitro and in vivo toxic effects of newly synthesized benzimidazole-based organophosphorus compounds. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2013; 87:23-32. [PMID: 23116621 DOI: 10.1016/j.ecoenv.2012.10.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2012] [Revised: 10/09/2012] [Accepted: 10/09/2012] [Indexed: 06/01/2023]
Abstract
This paper reports the toxic properties of eight newly synthesized benzimidazole-based organophosphorus (OP) compounds in Xenopus laevis in both in vivo and in vitro conditions. For both experiments, a commercial solution of azinphos methyl (AzM, Gusathion M WP25) was used as a reference compound. The 24-h median lethal concentrations (LC₅₀) of all tested compounds were determined for 46th stage tadpoles in the range of 9.54-140.0 μM. For evaluation of the lethality of the compounds, the activity of the enzyme biomarkers acetylcholinesterase (AChE), carboxylesterase, glutathione S-transferase (GST), glutathione peroxidase, glutathione reductase, lactate dehydrogenase, aspartate aminotransferase, and alanine aminotransferase were determined in vivo in X. laevis tadpoles exposed to three concentrations (LC₅₀, LC₅₀/2, and LC₅₀/4) of tested compounds. All exposure concentrations of AzM and seven of eight tested compounds caused CaE inhibition in in vivo conditions. Furthermore, the AChE inhibition capacity of tested compounds in commercial electric eel AChE and in X. laevis homogenates and also CaE inhibition capacity in only X. laevis homogenates were assayed for a 30-min in vitro exposure period. Eight OP compounds did not inhibit AChE activity more than 23 percent, but AzM exposure inhibited AChE activity by 26 percent for X. laevis homogenates and 97 percent for electric fish AChE in in vitro conditions. Also, CaE inhibition levels in X. laevis tadpole homogenates were 46 percent for AzM and between 8 percent and 33 percent for other compounds in in vitro conditions.
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Affiliation(s)
- Abbas Güngördü
- Laboratory of Environmental Toxicology, Department of Biology, Faculty of Arts and Science, Inonu University, Malatya 44280, Turkey.
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9
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Yslas EI, Ibarra LE, Peralta DO, Barbero CA, Rivarola VA, Bertuzzi ML. Polyaniline nanofibers: acute toxicity and teratogenic effect on Rhinella arenarum embryos. CHEMOSPHERE 2012; 87:1374-1380. [PMID: 22386461 DOI: 10.1016/j.chemosphere.2012.02.033] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2011] [Revised: 02/06/2012] [Accepted: 02/08/2012] [Indexed: 05/31/2023]
Abstract
The fate and effect of nanomaterials in the environment is of paramount importance towards the technological application of the materials. This work shows the ecotoxicological potential of polyaniline (PANI) nanofibers in the larvae Rhinella arenarum by means of AMPHITOX test. Acute toxicity of PANI nanofibers towards embryos of the common South American toad R. arenarum (Anura: bufonidae) was evaluated in the premetamorphosis (stage 25) larvae. The exposure of R. arenarum larvae to at dose of 150, 250 and 400 mg L(-1) resulted in 100% viability within 96 h exposure. The embryos at 2-4 blastomers stage (early life stage teratogenic test) revealed that embryos were not killed and no teratogenic effects were observed when embryos were incubated with PANI nanofibers (150 and 250 mg L(-1)), while only a growth retardation of embryos was induced at levels of 250 mg PANI nanofibers L(-1). On the other hand, at 400 mg L(-1) concentration, a reduction in the body length of larvae and tail malformation was observed. This results suggest that a concentration-dependent toxicity is operative, typified by phenotypes that had abnormal body axes. The presence of PANI nanofibers in gut contents and its excretion by larval stages of R. arenarum was confirmed by UV-visible spectroscopy.
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Affiliation(s)
- Edith I Yslas
- Departamento de Biología Molecular, Universidad Nacional de Río Cuarto, Agencia Postal Nro 3, X580BYA Río Cuarto, Argentina.
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Targets and effects of yessotoxin, okadaic acid and palytoxin: a differential review. Mar Drugs 2010; 8:658-77. [PMID: 20411120 PMCID: PMC2857362 DOI: 10.3390/md8030658] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2010] [Revised: 02/09/2010] [Accepted: 02/10/2010] [Indexed: 01/14/2023] Open
Abstract
In this review, we focus on processes, organs and systems targeted by the marine toxins yessotoxin (YTX), okadaic acid (OA) and palytoxin (PTX). The effects of YTX and their basis are analyzed from data collected in the mollusc Mytilus galloprovincialis, the annelid Enchytraeus crypticus, Swiss CD1 mice and invertebrate and vertebrate cell cultures. OA and PTX, two toxins with a better established mode of action, are analyzed with regard to their effects on development. The amphibian Xenopus laevis is used as a model, and the Frog Embryo Teratogenesis Assay-Xenopus (FETAX) as the experimental protocol.
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Katayama A, Bhula R, Burns GR, Carazo E, Felsot A, Hamilton D, Harris C, Kim YH, Kleter G, Koedel W, Linders J, Peijnenburg JGMW, Sabljic A, Stephenson RG, Racke DK, Rubin B, Tanaka K, Unsworth J, Wauchope RD. Bioavailability of xenobiotics in the soil environment. REVIEWS OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2010; 203:1-86. [PMID: 19957116 DOI: 10.1007/978-1-4419-1352-4_1] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
It is often presumed that all chemicals in soil are available to microorganisms, plant roots, and soil fauna via dermal exposure. Subsequent bioaccumulation through the food chain may then result in exposure to higher organisms. Using the presumption of total availability, national governments reduce environmental threshold levels of regulated chemicals by increasing guideline safety margins. However, evidence shows that chemical residues in the soil environment are not always bioavailable. Hence, actual chemical exposure levels of biota are much less than concentrations present in soil would suggest. Because "bioavailability" conveys meaning that combines implications of chemical sol persistency, efficacy, and toxicity, insights on the magnitude of a chemicals soil bioavailability is valuable. however, soil bioavailability of chemicals is a complex topic, and is affected by chemical properties, soil properties, species exposed, climate, and interaction processes. In this review, the state-of-art scientific basis for bioavailability is addressed. Key points covered include: definition, factors affecting bioavailability, equations governing key transport and distributive kinetics, and primary methods for estimating bioavailability. Primary transport mechanisms in living organisms, critical to an understanding of bioavailability, also presage the review. Transport of lipophilic chemicals occurs mainly by passive diffusion for all microorganisms, plants, and soil fauna. Therefore, the distribution of a chemical between organisms and soil (bioavailable proportion) follows partition equilibrium theory. However, a chemical's bioavailability does not always follow partition equilibrium theory because of other interactions with soil, such as soil sorption, hysteretic desorption, effects of surfactants in pore water, formation of "bound residue", etc. Bioassays for estimating chemical bioavailability have been introduced with several targeted endpoints: microbial degradation, uptake by higher plants and soil fauna, and toxicity to organisms. However, there bioassays are often time consuming and laborious. Thus, mild extraction methods have been employed to estimate bioavailability of chemicals. Mild methods include sequential extraction using alcohols, hexane/water, supercritical fluids (carbon dioxide), aqueous hydroxypropyl-beta-cyclodextrin extraction, polymeric TENAX beads extraction, and poly(dimethylsiloxane)-coated solid-phase microextraction. It should be noted that mild extraction methods may predict bioavailability at the moment when measurements are carried out, but not the changes in bioavailability that may occur over time. Simulation models are needed to estimate better bioavailability as a function of exposure time. In the past, models have progressed significantly by addressing each group of organisms separately: microbial degradation, plant uptake via evapotranspiration processes, and uptake of soil fauna in their habitat. This approach has been used primarily because of wide differences in the physiology and behaviors of such disparate organisms. However, improvement of models is badly needed, Particularly to describe uptake processes by plant and animals that impinge on bioavailability. Although models are required to describe all important factors that may affect chemical bioavailability to individual organisms over time (e.g., sorption/desorption to soil/sediment, volatilization, dissolution, aging, "bound residue" formation, biodegradation, etc.), these models should be simplified, when possible, to limit the number of parameters to the practical minimum. Although significant scientific progress has been made in understanding the complexities in specific methodologies dedicated to determining bioavailability, no method has yet emerged to characterized bioavailability across a wide range of chemicals, organisms, and soils/sediments. The primary aim in studying bioavailability is to define options for addressing bioremediation or environmental toxicity (risk assessment), and that is unlikely to change. Because of its importance in estimating research is needed to more comprehensively address the key environmental issue of "bioavailability of chemicals in soil/sediment."
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Affiliation(s)
- Arata Katayama
- EcoTopia Science Institute, Nagoya University, 464-8603, Nagoya, Japan.
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Chang JS, Gu MB, Kim KW. Effect of arsenic on p53 mutation and occurrence of teratogenic salamanders: their potential as ecological indicators for arsenic contamination. CHEMOSPHERE 2009; 75:948-954. [PMID: 19203779 DOI: 10.1016/j.chemosphere.2009.01.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2008] [Revised: 12/27/2008] [Accepted: 01/02/2009] [Indexed: 05/27/2023]
Abstract
The p53 mutation in salamanders can be used as an indicator of arsenic contamination. The influence of arsenic exposure was studied on mutation of tumor suppressor gene in salamanders collected from several As-contaminated mine areas in Korea. Salamander eggs and larvae were exposed to arsenic in a toxicity test, and teratogenic salamanders found in heavy metal- and As-contaminated water from As-Bi mines were evaluated using PCR-SSCP to determine if they would be useful as an ecological indicator species. Changes in amino acids were shown to have occurred as a result of an arsenic-accumulating event that occurred after the DNA damage. In addition, both of the Hynobius leechii exposed groups were primarily affected by forms of skin damage, changes in the lateral tail/dorsal flexure and/or abnormality teratogenesis. Single-base sense mutation in codons 346 (AAG: Lys to ATG: Met), 224 (TTT: Phe to TTA: Leu), 211 (ATG: Met to AAG: Lys), 244 (TTT: Phe to TTTG: insertion), 245 (Glu GAG to Gln CAG) and 249 (TGT Cys to TGA stop) of the p53 gene were simultaneously found in mutated salamanders. Based on the results of our data illustrating the effect of arsenic exposure on the p53 mutation of salamanders in arsenic-contaminated mine areas, these mutated salamanders can be used as potential ecological indicators in the arsenic-contaminated ecosystems.
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Affiliation(s)
- Jin-Soo Chang
- Arsenic Geoenvironment Laboratory (National Research Laboratory), Department of Environmental Science and Engineering, Gwangju Institute of Science and Technology (GIST), Buk-gu, Gwangju, Republic of Korea
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Huang D, Zhang Y, Wang Y, Xie Z, Ji W. Assessment of the genotoxicity in toad Bufo raddei exposed to petrochemical contaminants in Lanzhou Region, China. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2007; 629:81-8. [PMID: 17344091 DOI: 10.1016/j.mrgentox.2007.01.007] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2006] [Revised: 12/20/2006] [Accepted: 01/16/2007] [Indexed: 10/23/2022]
Abstract
Single cell gel electrophoresis or comet assay, micronucleus (MN) test and global DNA methylation detection were used to assess the genotoxicity in toad Bufo raddei exposed to the petrochemical (mainly oil and phenol) polluted area in Lanzhou Region (LZR) comparing with a relatively unpolluted area in Liujiaxia Region (LJXR). The results from the present study indicated that DNA damage and MN frequency in toad from LZR were significantly higher than those from LJXR at the same sampling month, whereas the degree of global DNA methylation was lower, which implies that the petrochemical contaminants at environmental level in LZR were genotoxic to B. raddei. The degree of genotoxic damage was obviously related with the extent of pollution among the three sampling months in LZR. The significantly positive correlations between DNA damage and concentrations of oil and/or phenol existed in liver cells but erythrocytes, implying that liver is more suitable as a sentinel tissue for the assessment of genotoxic impact of low-level contamination. The results from both comet assay and global DNA methylation detection on liver cells showed that the genotoxicity varied significantly with oil and/or phenol concentrations, suggesting that these two methods are relatively sensitive and suitable for monitoring the genotoxicity of petrochemical pollutants on amphibians.
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Affiliation(s)
- Dejun Huang
- School of Life Sciences, Lanzhou University, Lanzhou 730000, PR China
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14
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Casarini L, Franchini A, Malagoli D, Ottaviani E. Evaluation of the effects of the marine toxin okadaic acid by using FETAX assay. Toxicol Lett 2007; 169:145-51. [PMID: 17280804 DOI: 10.1016/j.toxlet.2006.12.011] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2006] [Revised: 12/28/2006] [Accepted: 12/29/2006] [Indexed: 11/21/2022]
Abstract
The Frog Embryo Teratogenesis Assay Xenopus (FETAX), is a screening assay using embryos at gastrula stage of the anuran Xenopus laevis to identify substances that may pose a developmental hazard in humans. The FETAX assay evaluates three parameters, i.e. mortality, delayed growth and embryo malformation. In the present investigation, the FETAX protocol was applied to the marine toxin okadaic acid (OA) and the experiments show that OA affects the above parameters in a dose-correlated manner. The morpho-functional modifications induced in embryo organs by OA were also studied. The nervous system, tail skeletal musculature, intestine and kidney appeared particularly damaged, with the former being the most sensitive. On the whole, various advantages emerge from using the FETAX assay: different parameters can be tested simultaneously, the indication of the presence of a potentially dangerous substance is rapid and the assay is a valid alternative to mammalian systems.
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Affiliation(s)
- Livio Casarini
- Department of Animal Biology, University of Modena and Reggio Emilia, via Campi 213/D 41100 Modena, Italy
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15
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Chenon P, Gauthier L, Loubières P, Séverac A, Delpoux M. Evaluation of the genotoxic and teratogenic potential of a municipal sludge and sludge-amended soil using the amphibian Xenopus laevis and the tobacco: Nicotiana tabacum L. var. xanthi Dulieu. THE SCIENCE OF THE TOTAL ENVIRONMENT 2003; 301:139-50. [PMID: 12493192 DOI: 10.1016/s0048-9697(02)00287-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The toxic, genotoxic and teratogenic potential of a municipal sewage sludge was assessed using the micronucleus assay on the larvae of the amphibian Xenopus laevis and with the tobacco somatic mutation test using the yellow-green xanthi Dulieu mutant a(1)(+)/a(1) a(2)(+)/a(2). The teratogenic potential was assessed by means of the Frog Embryo Teratogenesis Assay-Xenopus (FETAX). Various doses of the pasty sludge added to a crop soil were tested using the three bioassays. The test systems were performed either directly with sludge or sludge-amended soil samples (plant model) or with aqueous extracts (aquatic animal model). Using the tobacco model, we found no mutagenic impact of the soil amended with the sludge, perhaps because the clay-like nature of the soil, with its high adsorption capacity, may have prevented the contaminants from reaching the target. All leachates of amended soils produced a significant size reduction in Xenopus embryos. Depending on the soil/sludge ratio, some leachates were found to be genotoxic but were never teratogenic. This battery of in vivo test systems enabled us to estimate the global long-term effects under agricultural conditions with various genetic endpoints on ecologically relevant organisms characteristic of the aquatic and terrestrial compartments.
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Affiliation(s)
- Pascale Chenon
- Centre Universitaire Jean-François Champollion, place de Verdun, 81012 Albi cedex 9, France
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16
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Gornati R, Monetti C, Vigetti D, Bosisio S, Fortaner S, Sabbioni E, Bernardini G, Prati M. Arsenic toxicity and HSP70 expression in Xenopus laevis embryos. Altern Lab Anim 2002; 30:597-603. [PMID: 12513685 DOI: 10.1177/026119290203000606] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The evaluation of the effect of trace metals on health can be difficult, because of their presence in the environment in various chemical forms. Exposure to arsenic compounds is an example of this complexity, as it can be present in the environment in inorganic and organic forms. The effects of arsenic in vertebrates are complicated by several variables, such as speciation of the element, the exposure route, and the susceptibility of the particular animal species. The embryotoxicity and teratogenicity of three arsenic species - sodium arsenite (NaAsO(2)), disodium hydrogen arsenate (Na(2)HAsO(4)) and dimethylarsinic acid [(CH3)2AsOOH] - were evaluated by the modified frog embryo teratogenic assay on Xenopus (FETAX). We also show how the classical FETAX endpoints, based on morphological and morphometrical analysis, can conveniently be integrated with the study of molecular markers. Possible changes in the expression of the mRNA for the heat-shock protein HSP70, following exposure to NaAsO(2), were examined by using the reverse transcriptase polymerase chain reaction. HSP70 mRNA is strongly induced by arsenic.
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Affiliation(s)
- Rosalba Gornati
- Department of Structural and Functional Biology, Università dell'Insubria, 3 Via Dunant, 21100 Varese, Italy
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17
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Garber EAE. Mineral deficiency and the use of the FETAX bioassay to study environmental teratogens. J Appl Toxicol 2002; 22:237-40. [PMID: 12210540 DOI: 10.1002/jat.845] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The Frog Embryo Teratogenesis Assay: Xenopus (FETAX) bioassay has been employed extensively to screen compounds for teratogenic activity. Recent laboratory studies have indicated that low potassium concentrations retard Xenopus laevis development. The effects of varying concentrations of minerals on Xenopus laevis embryo length and development were examined to determine the utility of the FETAX bioassay in the study of environmental teratogens. Water samples collected from 18 wetlands in Minnesota and North Dakota correlated with low mineral levels, causing delayed embryonic development in the FETAX bioassay. When the concentration of sodium or potassium was <5 ppm, Xenopus laevis development was delayed. As a result, it was difficult to assess teratogenic activity after 96 h of incubation. Furthermore, the length of the embryos-an indication of development-paralleled changes in mineral composition. Comparisons between different wetlands based on changes in one specific mineral were not possible due to a synergism between various minerals. If the concentration of sodium and/or potassium was <5 ppm but > or =2 ppm, extension of the FETAX bioassay to 120 h allowed organogenesis to proceed through stage 46, as required for scoring in accordance with ASTM guidelines for the FETAX bioassay. In those cases in which the concentration of sodium and/or potassium were <2 ppm, the embryos could not develop to stage 46 within 120 h and the FETAX bioassay was not suitable for detecting teratogenic activity. Published in 2002 by John Wiley & Sons, Ltd.
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Affiliation(s)
- Eric A E Garber
- USDA-ARS, Biosciences Research Laboratory, 1605 Albrecht Blvd., Fargo, ND 58105, USA.
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Prati M, Molteni M, Pomati F, Rossetti C, Bernardini G. Biological effect of the Planktothrix sp. FP1 cyanobacterial extract. Toxicon 2002; 40:267-72. [PMID: 11711123 DOI: 10.1016/s0041-0101(01)00212-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Cyanobacteria are common and potentially harmful inhabitants of freshwater and marine environments worldwide. Some waterbloom-forming cyanobacteria are toxic and they may cause animal death and adversely affect human health. A filamentous freshwater cyanobacterium, Planktothrix sp. FP1, was found to be responsible for a toxic algal bloom in Lake Varese (Italy) during August of 1997. In the present study, the biological effects of the Planktothrix sp. FP1 cell extract on Xenopus embryos and on human Peripheral Blood Mononuclear Cells (PBMC) were investigated. FETAX (Frog Embryo Teratogenesis Assay-Xenopus) showed that the cyanobacterial extract had no teratogenic potential, though embryotoxicity was detected (LC(50) 2.944g/l wet weight). The same extract inhibited the proliferation of PBMC stimulated in vitro by phytohemagglutinin (PHA), and strongly interfered with the production of interleukin-2 (IL-2) and interferon-gamma (IFN-gamma).
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Affiliation(s)
- M Prati
- Department of Structural and Functional Biology, University of Insubria, via J.H. Dunant 3, 21100 Varese, Italy
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Prati M, Gornati R, Boracchi P, Biganzoli E, Fortaner S, Pietra R, Sabbioni E, Bernardini G. A comparative study of the toxicity of mercury dichloride and methylmercury, assayed by the Frog Embryo Teratogenesis Assay--Xenopus (FETAX). Altern Lab Anim 2002; 30:23-32. [PMID: 11827568 DOI: 10.1177/026119290203000104] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The Frog Embryo Teratogenesis Assay-Xenopus (FETAX) is a powerful and flexible bioassay that makes use of the embryos of the anuran amphibian Xenopus laevis. The FETAX can detect xenobiotics that affect embryonic development, when mortality, teratogenicity and growth inhibition are used as endpoints. The FETAX was used to compare the embryotoxic and teratogenic potentials of two chemical species of mercury, inorganic mercury(II) chloride (HgCl2) and organic methylmercury chloride (MeHgCl). A higher toxicity of MeHgCl (the estimated median lethal concentration [LC50] and median teratogenic concentration [TC50] were 0.313microM and 0.236microM, respectively) over HgCl2, with estimated LC50 and TC50 values of 0.601microM and 0.513microM, respectively). On the basis of these results, HgCl2 and MeHgCl can be classified as "slightly teratogenic compounds", as the ratio of LC50/TC50 is less than 1.5. There was a significant deviation from the commonly described monotonic behaviour of the concentration-response curves, suggesting a hormetic effect of both species of mercury. Uptake experiments, followed by neutron activation analysis, showed a higher incorporation of mercury in embryos exposed to MeHgCl compared with those exposed to HgCl2. Interestingly, Hg- exposed embryos showed a higher content of selenium and zinc than did control embryos.
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Affiliation(s)
- Mariangela Prati
- Department of Structural and Functional Biology, Università dell'Insubria, 3 Via Dunant, 21100 Varese, Italy
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