1
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Incardona JP, Linbo TL, Cameron JR, Scholz NL. Structure-activity relationships for alkyl-phenanthrenes support two independent but interacting synergistic models for PAC mixture potency. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 918:170544. [PMID: 38309367 DOI: 10.1016/j.scitotenv.2024.170544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Revised: 01/19/2024] [Accepted: 01/27/2024] [Indexed: 02/05/2024]
Abstract
Multiple lines of evidence at whole animal, cellular and molecular levels implicate polycyclic aromatic compounds (PACs) with three rings as drivers of crude oil toxicity to developing fish. Phenanthrene (P0) and its alkylated homologs (C1- through C4-phenanthrenes) comprise the most prominent subfraction of tricyclic PACs in crude oils. Among this family, P0 has been studied intensively, with more limited detail available for the C4-phenanthrene 1-methyl-7-isopropyl-phenanthrene (1-M,7-IP, or retene). While both compounds are cardiotoxic, P0 impacts embryonic cardiac function and development through direct blockade of K+ and Ca2+ currents that regulate cardiomyocyte contractions. In contrast, 1-M,7-IP dysregulates aryl hydrocarbon receptor (AHR) activation in developing ventricular cardiomyocytes. Although no other compounds have been assessed in detail across the larger family of alkylated phenanthrenes, increasing alkylation might be expected to shift phenanthrene family member activity from K+/Ca2+ ion current blockade to AHR activation. Using embryos of two distantly related fish species, zebrafish and Atlantic haddock, we tested 14 alkyl-phenanthrenes in both acute and latent developmental cardiotoxicity assays. All compounds were cardiotoxic, and effects were resolved into impacts on multiple, highly specific aspects of heart development or function. Craniofacial defects were clearly linked to developmental cardiotoxicity. Based on these findings, we suggest a novel framework to delineate the developmental toxicity of petrogenic PAC mixtures in fish, which incorporates multi-mechanistic pathways that produce interactive synergism at the organ level. In addition, relationships among measured embryo tissue concentrations, cytochrome P4501A mRNA induction, and cardiotoxic responses suggest a two-compartment toxicokinetic model that independently predicts high potency of PAC mixtures through classical metabolic synergism. These two modes of synergism, specific to the sub-fraction of phenanthrenes, are sufficient to explain the high embryotoxic potency of crude oils, independent of as-yet unmeasured compounds in these complex environmental mixtures.
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Affiliation(s)
- John P Incardona
- Environmental and Fisheries Science Division, Northwest Fisheries Science Center, National Marine Fisheries Service, NOAA Fisheries, Seattle, WA, USA.
| | - Tiffany L Linbo
- Environmental and Fisheries Science Division, Northwest Fisheries Science Center, National Marine Fisheries Service, NOAA Fisheries, Seattle, WA, USA
| | - James R Cameron
- Saltwater, Inc., Under Contract to Northwest Fisheries Science Center, National Oceanic and Atmospheric Administration, Seattle, WA, USA
| | - Nathaniel L Scholz
- Environmental and Fisheries Science Division, Northwest Fisheries Science Center, National Marine Fisheries Service, NOAA Fisheries, Seattle, WA, USA
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2
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Hu H, Ma P, Li H, You J. Determining buffering capacity of polydimethylsiloxane-based passive dosing for hydrophobic organic compounds in large-volume bioassays. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 914:169710. [PMID: 38184249 DOI: 10.1016/j.scitotenv.2023.169710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 12/25/2023] [Accepted: 12/25/2023] [Indexed: 01/08/2024]
Abstract
Polydimethylsiloxane (PDMS) is the most widely used material for passive dosing. However, the ability of PDMS to maintain constant water concentrations of chemicals in large-volume bioassays was insufficiently investigated. In this study, we proposed a kinetic-based method to determine the buffering capacity of PDMS for maintaining constant water concentrations of hydrophobic organic contaminants (HOCs) in large-volume bioassays. A good correlation between log Kow and PDMS-water partitioning coefficients (log KPW) was observed for HOCs with log Kow values ranging from 3.30 to 7.42. For low-molecular-weight HOCs, volatile loss was identified as the primary cause of unstable water concentrations in passive dosing systems. Slow desorption from PDMS resulted in a reduction of water concentrations for high-molecular-weight HOCs. The volume ratio of PDMS to water (RV) was the key factor controlling buffering capacity. As such, buffering capacity was defined as the minimum RV required to maintain 90% of the initial water concentration and was determined to be 0.0076-0.032 for six representative HOCs. Finally, passive dosing with an RV of 0.014 was validated to effectively maintain water concentrations of phenanthrene in 2-L and 96-h toxicity tests with adult mosquitofish. By determining buffering capacity of PDMS, this study recommended specific RV values for cost-efficient implementation of passive dosing approaches in aquatic toxicology, particularly in large-volume bioassays.
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Affiliation(s)
- Hao Hu
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou 511443, China
| | - Ping Ma
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou 511443, China; Department of Eco-engineering, Guangdong Eco-Engineering Polytechnic, Guangzhou 510520, China
| | - Huizhen Li
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou 511443, China.
| | - Jing You
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou 511443, China
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3
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Fischer FC, Hiki K, Endo S. Free Versus Bound Concentration: Passive Dosing from Polymer Meshes Elucidates Drivers of Toxicity in Aquatic Tests with Benthic Invertebrates. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2022. [PMID: 36039972 DOI: 10.1002/etc.5473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Revised: 07/25/2022] [Accepted: 08/23/2022] [Indexed: 06/15/2023]
Abstract
Aquatic toxicity tests with benthic organisms are used to predict the toxicity of hydrophobic organic chemicals (HOCs) in sediments, assuming that the freely dissolved concentration (Cfree ) is a good surrogate of bioavailability in the exposure system. However, Cfree of HOCs is difficult to control in water-only setups. Moreover, the role of dissolved organic carbon (DOC) in the occurrence of toxicity needs clarification because DOC concentrations in sediment porewater can be substantially higher than in typical test water. We introduced biocompatible polyethylene meshes with high sorptive capacities and fast release kinetics as a novel passive dosing phase, which maintained Cfree and Cwater (i.e., free + DOC-bound) in Hyalella azteca water-only tests. Adding the supernatant fraction of peat to test water as a DOC source increased Cwater to an extent comparable to sediment porewater and significantly increased and decreased the observed toxicity of permethrin and benzo[a]pyrene, respectively, to H. azteca. This result indicates that DOC can both benefit and harm test species likely due to the increased health after ingestion of DOC and to the uptake of DOC-bound HOCs, respectively. Passive dosing in combination with the addition of sediment DOC surrogates may better reflect exposure and habitat conditions in sediment porewater than conventional aquatic tests. Environ Toxicol Chem 2022;00:1-10. © 2022 The Authors. Environmental Toxicology and Chemistry published by Wiley Periodicals LLC on behalf of SETAC.
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Affiliation(s)
- Fabian C Fischer
- Health and Environmental Risk Division, National Institute for Environmental Studies, Onogawa, Tsukuba, Ibaraki, Japan
| | - Kyoshiro Hiki
- Health and Environmental Risk Division, National Institute for Environmental Studies, Onogawa, Tsukuba, Ibaraki, Japan
| | - Satoshi Endo
- Health and Environmental Risk Division, National Institute for Environmental Studies, Onogawa, Tsukuba, Ibaraki, Japan
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4
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Meador JP. The fish early-life stage sublethal toxicity syndrome - A high-dose baseline toxicity response. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 291:118201. [PMID: 34740289 DOI: 10.1016/j.envpol.2021.118201] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 08/31/2021] [Accepted: 09/17/2021] [Indexed: 06/13/2023]
Abstract
A large number of toxicity studies report abnormalities in early life-stage (ELS) fish that are described here as a sublethal toxicity syndrome (TxSnFELS) and generally include a reduced heart rate, edemas (yolk sac and cardiac), and a variety of morphological abnormalities. The TxSnFELS is very common and not diagnostic for any chemical or class of chemicals. This sublethal toxicity syndrome is mostly observed at high exposure concentrations and appears to be a baseline, non-specific toxicity response; however, it can also occur at low doses by specific action. Toxicity metrics for this syndrome generally occur at concentrations just below those causing mortality and have been reported for a large number of diverse chemicals. Predictions based on tissue concentrations or quantitative-structure activity relationship (QSAR) models support the designation of baseline toxicity for many of the tested chemicals, which is confirmed by observed values. Given the sheer number of disparate chemicals causing the TxSnFELS and correlation with QSAR derived partitioning; the only logical conclusion for these high-dose responses is baseline toxicity by nonspecific action and not a lock and key type receptor response. It is important to recognize that many chemicals can act both as baseline toxicants and specific acting toxicants likely via receptor interaction and it is not possible to predict those threshold doses from baseline toxicity. We should search out these specific low-dose responses for ecological risk assessment and not rely on high-concentration toxicity responses to guide environmental protection. The goal for toxicity assessment should not be to characterize toxic responses at baseline toxicity concentrations, but to evaluate chemicals for their most toxic potential. Additional aspects of this review evaluated the fish ELS teratogenic responses in relation to mammalian oral LD50s and explored potential key events responsible for baseline toxicity.
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Affiliation(s)
- James P Meador
- Ecotoxicology Program, Environmental and Fisheries Sciences Division, Northwest Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration, 2725 Montlake Blvd E, Seattle, WA, 98112, USA.
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5
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Sørhus E, Meier S, Donald CE, Furmanek T, Edvardsen RB, Lie KK. Cardiac dysfunction affects eye development and vision by reducing supply of lipids in fish. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 800:149460. [PMID: 34391158 DOI: 10.1016/j.scitotenv.2021.149460] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 07/31/2021] [Accepted: 07/31/2021] [Indexed: 06/13/2023]
Abstract
Developing organisms are especially vulnerable to environmental stressors. Crude oil exposure in early life stages of fish result in multiple functional and developmental defects, including cardiac dysfunction and abnormal and smaller eyes. Phenanthrene (Phe) has a reversible impact on cardiac function, and under exposure Phe reduces cardiac contractility. Exposure to a known L-type channel blocker, nicardipine hydrochloride (Nic) also disrupts cardiac function and creates eye deformities. We aimed to investigate whether cardiac dysfunction was the major underlying mechanism of crude oil-, Phe- and Nic-induced eye malformations. We exposed Atlantic haddock (Melanogrammus aeglefinus) early embryos to Nic and crude oil (Oil) and late embryos/early larvae to Phe exposure. All three exposures resulted in cardiac abnormalities and lead to severe, eye, jaw and spinal deformities at early larval stages. At 3 days post hatching, larvae from the exposures and corresponding controls were dissected. Eyes, trunk, head and yolk sac were subjected to lipid profiling, and eyes were also subjected to transcriptomic profiling. Among most enriched pathways in the eye transcriptomes were fatty acid metabolism, calcium signaling and phototransduction. Changes in lipid profiles and the transcriptome suggested that the dysfunctional and abnormal eyes in our exposures were due to both disruption of signaling pathways and insufficient supply of essential fatty acids and other nutrients form the yolk.
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Affiliation(s)
- Elin Sørhus
- Insititue of Marine Research, Nordnesgaten 50, 5005 Bergen, Norway.
| | - Sonnich Meier
- Insititue of Marine Research, Nordnesgaten 50, 5005 Bergen, Norway
| | - Carey E Donald
- Insititue of Marine Research, Nordnesgaten 50, 5005 Bergen, Norway
| | - Tomasz Furmanek
- Insititue of Marine Research, Nordnesgaten 50, 5005 Bergen, Norway
| | - Rolf B Edvardsen
- Insititue of Marine Research, Nordnesgaten 50, 5005 Bergen, Norway
| | - Kai K Lie
- Insititue of Marine Research, Nordnesgaten 50, 5005 Bergen, Norway
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6
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Alves RN, Mariz CF, de Melo Alves MK, Cavalcanti MGN, de Melo TJB, de Arruda-Santos RH, Zanardi-Lamardo E, Carvalho PSM. Contamination and Toxicity of Surface Waters Along Rural and Urban Regions of the Capibaribe River in Tropical Northeastern Brazil. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2021; 40:3063-3077. [PMID: 34324728 DOI: 10.1002/etc.5180] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Revised: 02/09/2021] [Accepted: 07/26/2021] [Indexed: 06/13/2023]
Abstract
The Capibaribe River provides water to a population of 1.7 million people in the Brazilian northeast, while receiving agricultural runoff and industrial and domestic effluents along its 280 km. The present study evaluated the ecotoxicity of surface waters along ten sites in rural and urban areas using zebrafish (Danio rerio) early-life stages and related it to water quality indices and chemical abiotic variables. Lethality rates, delays in embryo-larval development quantified by the general morphology score (GMS), and frequencies of developmental abnormalities were analyzed. A correlation was detected between zebrafish GMS and water quality index (WQI), sensitivity to domestic sewage contamination, and trophic state index, focused on eutrophication. These indices agreed in identifying a spatial pattern of smaller impact in terms of ecotoxicity, domestic sewage contamination, and eutrophication risk at three sites in rural areas (mean GMS 16.9), an intermediate impact at four sites with urban and agricultural influence (mean GMS 16.4), and greatest impacts at three more urbanized sites (mean GMS 14.9). Most frequent developmental abnormalities included noninflation of the swim bladder, delayed hatching, nonprotrusion of the mouth, blood stasis, and nondevelopment of pectoral fins. Toxic NH3 concentrations varied spatially, with higher concentrations in urban sites; and blood stasis correlated positively with NH3 , suggesting a causal relationship. Polycyclic aromatic hydrocarbons were detected in both rural and urbanized sites, contributing to detected toxicity. The present study demonstrates the potential of zebrafish early-life stages as an ecotoxicological model that may contribute to a better understanding of surface water quality and ecotoxicity in tropical river systems. Environ Toxicol Chem 2021;40:3063-3077. © 2021 SETAC.
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Affiliation(s)
- Romulo Nepomuceno Alves
- Laboratório de Ecotoxicologia Aquática, Centro de Biociências, Federal University of Pernambuco, Recife, Brazil
| | - Célio Freire Mariz
- Laboratório de Ecotoxicologia Aquática, Centro de Biociências, Federal University of Pernambuco, Recife, Brazil
| | | | | | | | - Roxanny Helen de Arruda-Santos
- Laboratório de Compostos Orgânicos em Ecossistemas Costeiros e Marinhos (OrganoMAR), Centro de Tecnologia e Geociências, Federal University of Pernambuco, Recife, Brazil
| | - Eliete Zanardi-Lamardo
- Laboratório de Compostos Orgânicos em Ecossistemas Costeiros e Marinhos (OrganoMAR), Centro de Tecnologia e Geociências, Federal University of Pernambuco, Recife, Brazil
| | - Paulo S M Carvalho
- Laboratório de Ecotoxicologia Aquática, Centro de Biociências, Federal University of Pernambuco, Recife, Brazil
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7
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Massei R, Knapen D, Covaci A, Blust R, Mayer P, Vergauwen L. Sublethal Effect Concentrations for Nonpolar Narcosis in the Zebrafish Embryo. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2021; 40:2802-2812. [PMID: 34288096 DOI: 10.1002/etc.5170] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 06/12/2021] [Accepted: 07/14/2021] [Indexed: 06/13/2023]
Abstract
Nonpolar narcosis, also known as baseline toxicity, has been described as the minimal toxicity that an organic chemical may elicit based on its lipophilicity. Although lethal effects of narcosis-inducing chemicals (NICs) have been thoroughly investigated, knowledge of sublethal effects is still very limited. We investigated the effects of 3 well-known NICs (phenanthrene, 1,3,5-trichlorobenzene, and pentachlorobenzene) on a variety of organismal endpoints (malformations, swim bladder inflation, respiration, heart rate, swimming activity, and turning angles), which can be plausibly linked to narcosis in zebrafish embryos. Baseline toxicity recorded as mortality is typically observed in similar exposure ranges in a wide variety of species including fish, corresponding to a chemical activity range between 0.01 and 0.1. In the present study, we found that sublethal effects occurred at concentrations approximately 5 times below lethal concentrations. Altered swimming activity and impaired swim bladder inflation were the most sensitive endpoints occurring at exposure levels below the generally accepted threshold for baseline toxicity for 2 out of 3 compounds. Overall, most effective exposure levels across the sublethal endpoints and compounds did fall within the range typically associated with baseline toxicity, and deviations were generally limited to a factor 10. Although there could be benefit in adding sublethal endpoints to toxicity tests, such as the fish embryo acute toxicity (FET) test, based on the present sublethal endpoints and available evidence from our and other studies, the underestimation of toxicity as a result of the sole assessment of mortality as an endpoint in an FET test may be limited for narcosis. Environ Toxicol Chem 2021;40:2802-2812. © 2021 SETAC.
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Affiliation(s)
- Riccardo Massei
- Zebrafishlab, Veterinary, Department of Veterinary Sciences, University of Antwerp, Wilrijk, Belgium
| | - Dries Knapen
- Zebrafishlab, Veterinary, Department of Veterinary Sciences, University of Antwerp, Wilrijk, Belgium
| | - Adrian Covaci
- Toxicological Centre, Department of Pharmaceutical Sciences, University of Antwerp, Wilrijk, Belgium
| | - Ronny Blust
- Systemic Physiological and Ecotoxicological Research, Department of Biology, University of Antwerp, Antwerp, Belgium
| | - Philipp Mayer
- Department of Environmental Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark
| | - Lucia Vergauwen
- Zebrafishlab, Veterinary, Department of Veterinary Sciences, University of Antwerp, Wilrijk, Belgium
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8
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Price ER, Mager EM. The effects of exposure to crude oil or PAHs on fish swim bladder development and function. Comp Biochem Physiol C Toxicol Pharmacol 2020; 238:108853. [PMID: 32777466 DOI: 10.1016/j.cbpc.2020.108853] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Revised: 07/03/2020] [Accepted: 07/27/2020] [Indexed: 11/17/2022]
Abstract
The failure of the swim bladder to inflate during fish development is a common and sensitive response to exposure to petrochemicals. Here, we review potential mechanisms by which petrochemicals or their toxic components (polycyclic aromatic hydrocarbons; PAHs) may affect swim bladder inflation, particularly during early life stages. Surface films formed by oil can cause a physical barrier to primary inflation by air gulping, and are likely important during oil spills. The act of swimming to the surface for primary inflation can be arduous for some species, and may prevent inflation if this behavior is limited by toxic effects on vision or musculature. Some studies have noted altered gene expression in the swim bladder in response to PAHs, and Cytochrome P450 1A (CYP1A) can be induced in swim bladder or rete mirabile tissue, suggesting that PAHs can have direct effects on swim bladder development. Swim bladder inflation failure can also occur secondarily to the failure of other systems; cardiovascular impairment is the best elucidated of these mechanisms, but other mechanisms might include non-inflation as a sequela of disruption to thyroid signaling or cholesterol metabolism. Failed swim bladder inflation has the potential to lead to chronic sublethal effects that are as yet unstudied.
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Affiliation(s)
- Edwin R Price
- Department of Biological Sciences and Advanced Environmental Research Institute, University of North Texas, Denton, TX 76203, United States of America.
| | - Edward M Mager
- Department of Biological Sciences and Advanced Environmental Research Institute, University of North Texas, Denton, TX 76203, United States of America
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9
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Leung KM, Yeung KW, You J, Choi K, Zhang X, Smith R, Zhou G, Yung MM, Arias‐Barreiro C, An Y, Burket SR, Dwyer R, Goodkin N, Hii YS, Hoang T, Humphrey C, Iwai CB, Jeong S, Juhel G, Karami A, Kyriazi‐Huber K, Lee K, Lin B, Lu B, Martin P, Nillos MG, Oginawati K, Rathnayake I, Risjani Y, Shoeb M, Tan CH, Tsuchiya MC, Ankley GT, Boxall AB, Rudd MA, Brooks BW. Toward Sustainable Environmental Quality: Priority Research Questions for Asia. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2020; 39:1485-1505. [PMID: 32474951 PMCID: PMC7496081 DOI: 10.1002/etc.4788] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Revised: 04/03/2020] [Accepted: 05/22/2020] [Indexed: 05/22/2023]
Abstract
Environmental and human health challenges are pronounced in Asia, an exceptionally diverse and complex region where influences of global megatrends are extensive and numerous stresses to environmental quality exist. Identifying priorities necessary to engage grand challenges can be facilitated through horizon scanning exercises, and to this end we identified and examined 23 priority research questions needed to advance toward more sustainable environmental quality in Asia, as part of the Global Horizon Scanning Project. Advances in environmental toxicology, environmental chemistry, biological monitoring, and risk-assessment methodologies are necessary to address the adverse impacts of environmental stressors on ecosystem services and biodiversity, with Asia being home to numerous biodiversity hotspots. Intersections of the food-energy-water nexus are profound in Asia; innovative and aggressive technologies are necessary to provide clean water, ensure food safety, and stimulate energy efficiency, while improving ecological integrity and addressing legacy and emerging threats to public health and the environment, particularly with increased aquaculture production. Asia is the largest chemical-producing continent globally. Accordingly, sustainable and green chemistry and engineering present decided opportunities to stimulate innovation and realize a number of the United Nations Sustainable Development Goals. Engaging the priority research questions identified herein will require transdisciplinary coordination through existing and nontraditional partnerships within and among countries and sectors. Answering these questions will not be easy but is necessary to achieve more sustainable environmental quality in Asia. Environ Toxicol Chem 2020;39:1485-1505. © 2020 The Authors. Environmental Toxicology and Chemistry published by Wiley Periodicals LLC on behalf of SETAC.
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Affiliation(s)
- Kenneth M.Y. Leung
- Swire Institute of Marine Science and School of Biological SciencesUniversity of Hong KongPokfulamHong KongChina
- State Key Laboratory of Marine Pollution and Department of ChemistryCity University of Hong KongKowloonHong KongChina
| | - Katie W.Y. Yeung
- Swire Institute of Marine Science and School of Biological SciencesUniversity of Hong KongPokfulamHong KongChina
| | - Jing You
- School of Environment and Guangdong Key Laboratory of Environmental Pollution and HealthJinan UniversityGuangzhouChina
| | | | - Xiaowei Zhang
- School of the EnvironmentNanjing UniversityNanjingChina
| | | | - Guang‐Jie Zhou
- Swire Institute of Marine Science and School of Biological SciencesUniversity of Hong KongPokfulamHong KongChina
| | | | | | | | | | | | | | | | | | - Chris Humphrey
- Supervising Scientist BranchCanberraAustralian Capital TerritoryAustralia
| | | | | | | | | | | | | | - Bin‐Le Lin
- National Institute of Advanced Industrial Science and TechnologyTokyoJapan
| | - Ben Lu
- International Copper Association–AsiaShanghaiChina
| | | | - Mae Grace Nillos
- College of Fisheries and Ocean SciencesUniversity of the Philippines VisayasIloilo CityPhilippines
| | | | - I.V.N. Rathnayake
- Department of MicrobiologyFaculty of Science, University of KelaniyaKelaniyaSri Lanka
| | | | | | | | | | | | | | | | - Bryan W. Brooks
- School of Environment and Guangdong Key Laboratory of Environmental Pollution and HealthJinan UniversityGuangzhouChina
- Baylor UniversityWacoTexasUSA
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10
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Stibany F, Schmidt SN, Mayer P, Schäffer A. Toxicity of dodecylbenzene to algae, crustacean, and fish - Passive dosing of highly hydrophobic liquids at the solubility limit. CHEMOSPHERE 2020; 251:126396. [PMID: 32163782 DOI: 10.1016/j.chemosphere.2020.126396] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 02/28/2020] [Accepted: 02/29/2020] [Indexed: 06/10/2023]
Abstract
In the current study, improved exposure control and measurements were applied for the aquatic toxicity testing of a highly hydrophobic organic compound. The aim was to reliably determine the ecotoxicity of the model compound dodecylbenzene (DDB, Log KOW = 8.65) by applying passive dosing for aquatic toxicity testing exactly at the solubility limit. Methodologically, silicone O-rings were saturated by immersion in pure liquid DDB (i.e., "loading by swelling") and then used as passive dosing donors. Daphnia immobilization and fish embryo toxicity tests were successfully conducted and provide, together with recently reported algal growth inhibition data, a full base-set of ecotoxicological data according to REACH. All tests were conducted in closed test systems to avoid evaporative losses, and exposure concentrations were measured throughout test durations. The Daphnia test was optimized by placing the O-rings in cages to prevent direct contact between daphnids and the passive dosing donor. Toxicologically, Daphnia magna immobilization was 19.3 ± 8% (mean ± 95% CI; 6 tests) within 72 h, whereas Danio rerio fish embryos did not show any significant lethal or sublethal toxic responses within 96 h. Growth rate inhibition for the algae Raphidocelis subcapitata was previously reported to be 13 ± 5% in a first and 8 ± 3% in a repeated test. These results for aquatic organisms, spanning three trophic levels, demonstrate toxicity of a highly hydrophobic compound and suggest that improvements of the current ecotoxicological standard tests are needed for these "difficult-to-test" chemicals. Furthermore, the obtained toxicity results significantly question the existence of a generic Log KOW cut-off in baseline toxicity.
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Affiliation(s)
- Felix Stibany
- Institute for Environmental Research (Biology V), RWTH Aachen University, Worringerweg 1, 52074, Aachen, Germany; Department of Environmental Engineering, Technical University of Denmark, Bygningstorvet B115, 2800, Kgs. Lyngby, Denmark.
| | - Stine Nørgaard Schmidt
- Department of Environmental Engineering, Technical University of Denmark, Bygningstorvet B115, 2800, Kgs. Lyngby, Denmark
| | - Philipp Mayer
- Department of Environmental Engineering, Technical University of Denmark, Bygningstorvet B115, 2800, Kgs. Lyngby, Denmark
| | - Andreas Schäffer
- Institute for Environmental Research (Biology V), RWTH Aachen University, Worringerweg 1, 52074, Aachen, Germany
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11
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Stinckens E, Vergauwen L, Blackwell BR, Ankley GT, Villeneuve DL, Knapen D. Effect of Thyroperoxidase and Deiodinase Inhibition on Anterior Swim Bladder Inflation in the Zebrafish. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:6213-6223. [PMID: 32320227 PMCID: PMC7477623 DOI: 10.1021/acs.est.9b07204] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
A set of adverse outcome pathways (AOPs) linking inhibition of thyroperoxidase and deiodinase to impaired swim bladder inflation in fish has recently been developed. These AOPs help to establish links between these thyroid hormone (TH) disrupting molecular events and adverse outcomes relevant to aquatic ecological risk assessment. Until now, very little data on the effects of TH disruption on inflation of the anterior chamber (AC) of the swim bladder were available. The present study used zebrafish exposure experiments with three model compounds with distinct thyroperoxidase and deiodinase inhibition potencies (methimazole, iopanoic acid, and propylthiouracil) to evaluate this linkage. Exposure to all three chemicals decreased whole body triiodothyronine (T3) concentrations, either through inhibition of thyroxine (T4) synthesis or through inhibition of Dio mediated conversion of T4 to T3. A quantitative relationship between reduced T3 and reduced AC inflation was established, a critical key event relationship linking impaired swim bladder inflation to TH disruption. Reduced inflation of the AC was directly linked to reductions in swimming distance compared to controls as well as to chemical-exposed fish whose ACs inflated. Together the data provide compelling support for AOPs linking TH disruption to impaired AC inflation in fish.
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Affiliation(s)
- Evelyn Stinckens
- Zebrafishlab, Veterinary Physiology and Biochemistry, Department of Veterinary Sciences, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium
| | - Lucia Vergauwen
- Zebrafishlab, Veterinary Physiology and Biochemistry, Department of Veterinary Sciences, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium
- Systemic Physiological and Ecotoxicological Research (SPHERE), Department of Biology, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
| | - Brett R. Blackwell
- United States Environmental Protection Agency, Great Lakes Toxicology and Ecology Division, 6201 Congdon Blvd, Duluth, MN 55804, USA
| | - Gerald T. Ankley
- United States Environmental Protection Agency, Great Lakes Toxicology and Ecology Division, 6201 Congdon Blvd, Duluth, MN 55804, USA
| | - Daniel L. Villeneuve
- United States Environmental Protection Agency, Great Lakes Toxicology and Ecology Division, 6201 Congdon Blvd, Duluth, MN 55804, USA
| | - Dries Knapen
- Zebrafishlab, Veterinary Physiology and Biochemistry, Department of Veterinary Sciences, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium
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12
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Kwon HA, Jeong Y, Jeon HP, Kim S. Comparing passive dosing and solvent spiking methods to determine the acute toxic effect of pentachlorophenol on Daphnia magna. ECOTOXICOLOGY (LONDON, ENGLAND) 2020; 29:286-294. [PMID: 32124145 DOI: 10.1007/s10646-020-02172-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 01/30/2020] [Indexed: 06/10/2023]
Abstract
Pentachlorophenol (PCP) is a widespread and persistent hydrophobic organic pollutant in the environment despite its restricted public use. Risk assessment of such hydrophobic organic compounds (HOCs) is challenging because sorption and volatilization issues during toxicity test often lead to inconsistent exposure concentration. Considering the hydrophobicity of the PCP, in this study, a passive dosing format was applied by adopting a silicone O-ring as a reservoir and evaluated its applicability on the determination of PCP on Daphnia magna. Results obtained with passive dosing method were compared with that of solvent spiking method. We hypothesized that the passive dosing method may provide more reliable and accurate toxicity results than conventional solvent spiking approach. As a result, the partition coefficient of PCP between methanol and a test medium (log KMeOH:ISO) was 2.1, which enabled the maintenance of reliable exposure concentration throughout the experiment. In the acute toxicity tests, passive dosing and solvent spiking showed similar EC50 values of 576 and 485 µg/L for 24 h, and 362 and 374 µg/L for 48 h, respectively, which overlap with EC50 values of previous studies. Altogether, both methods were suitable for the acute toxicity assessment of hydrophobic PCP.
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Affiliation(s)
- Hyun-Ah Kwon
- Environmental Safety Group, KIST Europe, Korea Institute of Science and Technology, Campus E7.1, 66123, Saarbrücken, Germany
- Division of Energy & Environment Technology, University of Science and Technology, Daejeon, 34113, Korea
| | - Yoonah Jeong
- Environmental Safety Group, KIST Europe, Korea Institute of Science and Technology, Campus E7.1, 66123, Saarbrücken, Germany
- Institute for Environmental Research, RWTH Aachen University, Worringerweg 1, 52076, Aachen, Germany
- Department of Land, Water and Environment Research, Korea Institute of Civil Engineering and Building Technology, Daehwa-Dong 283, Goyangdae-Ro, Ilsanseo-Gu, Goyang-Si, Gyeonggi-Do, 10223, Korea
| | - Hyun Pyo Jeon
- Environmental Safety Group, KIST Europe, Korea Institute of Science and Technology, Campus E7.1, 66123, Saarbrücken, Germany
| | - Sanghun Kim
- Environmental Safety Group, KIST Europe, Korea Institute of Science and Technology, Campus E7.1, 66123, Saarbrücken, Germany.
- Division of Energy & Environment Technology, University of Science and Technology, Daejeon, 34113, Korea.
- Department of Pharmaceutical Science and Technology, Kyungsung University, 309, Suyeong-ro, Nam-gu, Busan, 48434, Korea.
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13
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Trac LN, Schmidt SN, Holmstrup M, Mayer P. Headspace Passive Dosing of Volatile Hydrophobic Organic Chemicals from a Lipid Donor-Linking Their Toxicity to Well-Defined Exposure for an Improved Risk Assessment. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:13468-13476. [PMID: 31612707 DOI: 10.1021/acs.est.9b04681] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
High hydrophobicity and volatility of chemicals often lead to substantial experimental challenges but were here utilized in headspace passive dosing (HS-PD) to establish and maintain exposure: the pure chemical served as a passive dosing donor for controlling exposure at saturation, whereas triglyceride oil containing the chemical was used to control lower exposure levels. These donor solutions were added to glass inserts placed in the closed test systems. Mass balance calculations confirmed a dominant donor capacity for all chemicals except isooctane. This HS-PD method was applied to algal growth inhibition and springtail lethality tests with terpenes, alkanes, and cyclic siloxanes. Headspace concentrations above the lipid donors were measured for three chemicals to determine their chemical activity, using saturated vapor as the analytical standard and thermodynamic reference. Toxicity was related to chemical activity and calculated concentrations in membranes at equilibrium with the lipid donor. For both tests and all chemicals, toxic effects were observed within or above the reported range for baseline toxicity, meaning that no excess toxicity was observed. The toxicity of siloxanes was markedly higher to the terrestrial springtail than the aquatic algae, which is consistent with a more efficient mass transfer of these volatile hydrophobic chemicals in air compared to water.
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Affiliation(s)
- Lam Ngoc Trac
- Department of Environmental Engineering , Technical University of Denmark , DK-2800 Kgs Lyngby , Denmark
| | - Stine Nørgaard Schmidt
- Department of Environmental Engineering , Technical University of Denmark , DK-2800 Kgs Lyngby , Denmark
| | - Martin Holmstrup
- Department of Bioscience , Aarhus University , DK-8600 Silkeborg , Denmark
| | - Philipp Mayer
- Department of Environmental Engineering , Technical University of Denmark , DK-2800 Kgs Lyngby , Denmark
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14
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Meador JP, Nahrgang J. Characterizing Crude Oil Toxicity to Early-Life Stage Fish Based On a Complex Mixture: Are We Making Unsupported Assumptions? ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:11080-11092. [PMID: 31503459 DOI: 10.1021/acs.est.9b02889] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Numerous studies of the water-soluble fraction (WSF) from crude oil have concluded that polycyclic aromatic hydrocarbons (PAHs) are the primary causative agents for early life stage (ELS) fish toxicity. Noteworthy is the lack of studies demonstrating that the sum of PAHs are capable of causing toxic effects in ELS fish at the low levels claimed (0.1-5 μg/L) without being part of a complex crude oil mixture. Crude oil and the WSF are composed of thousands of other compounds that co-occur and likely contribute to crude oil toxicity. Based on the available data, it appears that the syndrome of effects (lower heart rate, edemas, and morphological abnormalities) for ELS fish exposed to the aqueous fraction of a crude oil mixture is commonly observed in studies exposing fish embryos to high concentrations of a variety of compounds and may be a nonspecific response. We conclude that the available data support the hypothesis that this syndrome of effects is likely the result of baseline toxicity (not receptor based) due to membrane disruption and resulting alteration in ion (e.g., calcium and potassium) homeostasis. We acknowledge the possibility of some compounds in the WSF capable of causing a specific receptor based toxicity response to ELS fish; however, such compounds have not been identified nor their receptor characterized. Concluding that PAHs are the main toxic compounds for crude oil exposure is misleading and does not result in guideline values that can be useful for environmental protection. Water quality guidelines for any single chemical or suite of chemicals must be based on a complete understanding of exposure concentrations, mechanism of action, potency, and resulting response. This review focuses on the toxic effects reported for fish embryos and the purported toxic concentrations observed in the aqueous phase of an oil/water mixture, the known levels of toxicity for individual PAHs, a toxic unit approach for characterizing mixtures, and the potential molecular initiating event for ELS toxicity in fish. This review also has implications for a large number of studies exposing ELS fish to a variety of compounds at high concentrations that result in a common baseline toxic response.
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Affiliation(s)
- James P Meador
- Environmental and Fisheries Sciences Division, Northwest Fisheries Science Center, National Marine Fisheries Service , National Oceanic and Atmospheric Administration , 2725 Montlake Boulevard East , Seattle , Washington 98112 , United States
| | - Jasmine Nahrgang
- Faculty of Biosciences, Fisheries and Economics, Department of Arctic and Marine Biology , UiT The Arctic University of Norway , N-9037 Tromsø , Norway
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15
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Sørensen L, Hansen BH, Farkas J, Donald CE, Robson WJ, Tonkin A, Meier S, Rowland SJ. Accumulation and toxicity of monoaromatic petroleum hydrocarbons in early life stages of cod and haddock. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 251:212-220. [PMID: 31078960 DOI: 10.1016/j.envpol.2019.04.126] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 04/23/2019] [Accepted: 04/28/2019] [Indexed: 06/09/2023]
Abstract
A multitude of recent studies have documented the detrimental effects of crude oil exposure on early life stages of fish, including larvae and embryos. While polycyclic aromatic hydrocarbons (PAHs), particularly alkyl PAHs, are often considered the main cause of observed toxic effects, other crude oil derived organic compounds are usually overlooked. In the current study, comprehensive two-dimensional gas chromatography coupled to mass spectrometry was applied to investigate the body burden of a wide range of petrogenic compounds in Atlantic haddock (Melanogrammus aeglefinus) and cod (Gadus morhua) embryos that had been exposed to sublethal doses of dispersed crude oil. Several groups of alkylated monoaromatic compounds (e.g. alkyl tetralins, indanes and alkyl benzenes), as well as highly alkylated PAHs, were found to accumulate in the fish embryos upon crude oil exposure. To investigate the toxicity of the monoaromatic compounds, two models (1-isopropyl-4-methyltetralin and 1-isopropyl-4-methylindane) were synthesized and shown to bioaccumulate and cause delayed hatching in developing embryos. Minor developmental effects, including craniofacial and jaw deformations and pericardial edemas, were also observed at the highest studied concentrations of the alkylindane.
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Affiliation(s)
- Lisbet Sørensen
- SINTEF Ocean, Environment and New Resources, N-7465, Trondheim, Norway; Institute of Marine Research, P.O. Box 1870, Nordnes, NO-5817, Bergen, Norway; Department of Chemistry, University of Bergen, P.O. Box 7800, NO-5020, Bergen, Norway.
| | | | - Julia Farkas
- SINTEF Ocean, Environment and New Resources, N-7465, Trondheim, Norway
| | - Carey E Donald
- Institute of Marine Research, P.O. Box 1870, Nordnes, NO-5817, Bergen, Norway
| | - William J Robson
- Petroleum & Environmental Geochemistry Group, Biogeochemistry Research Centre, University of Plymouth, Plymouth, PL4 8AA, Devon, UK
| | - Andrew Tonkin
- Petroleum & Environmental Geochemistry Group, Biogeochemistry Research Centre, University of Plymouth, Plymouth, PL4 8AA, Devon, UK
| | - Sonnich Meier
- Institute of Marine Research, P.O. Box 1870, Nordnes, NO-5817, Bergen, Norway
| | - Steven J Rowland
- Petroleum & Environmental Geochemistry Group, Biogeochemistry Research Centre, University of Plymouth, Plymouth, PL4 8AA, Devon, UK
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16
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Hansen BH, Malzahn A, Hagemann A, Farkas J, Skancke J, Altin D, Nordtug T. Acute and sub-lethal effects of an anionic polyacrylamide on sensitive early life stages of Atlantic cod (Gadus morhua). THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 652:1062-1070. [PMID: 30586793 DOI: 10.1016/j.scitotenv.2018.10.310] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Revised: 10/21/2018] [Accepted: 10/22/2018] [Indexed: 06/09/2023]
Abstract
Despite the possible increase in use of anionic polyacrylamide (APAM) in enhanced oil recovery operations, very little relevant information regarding ecotoxicity exists. The current study assessed acute and sub-lethal toxicity in sensitive early life stages (ELS) of Atlantic cod (Gadus morhua) exposed to 200 kDa APAM under controlled laboratory conditions. Two experiments (screening and long-term study) were conducted covering ecologically relevant endpoints (survival, hatching, growth, deformations, respiration and heart rate) in fish developing through embryogenesis, hatching, yolk-sac larvae stage and the first feeding period. The screening experiment was an 8-day exposure of embryos, whereas in the long-term experiments embryos and developing larvae were exposed continuously for 23 days. In the screening experiment, a significant reduction in embryonic heart rate was observed during exposure to 150 and 1500 mg APAM/L. However, we observed no effects on fitness-related endpoints (survival, hatching and growth) at concentrations up to 1500 mg L-1 APAM. Also, for the long-term exposure from late embryo to first feeding larvae stage, we observed reduced heart rate at 125 mg L-1. No consistent responses on survival, growth or respiration were observed except for the highest concentration tested (6000 mg L-1). Dispersion modelling based on expected and relevant discharged polymer concentrations and durations showed that predicted environmental concentrations were orders of magnitude lower than the concentrations tested in our experiments, indicating that 200 kDa APAM will have a limited probability of causing fitness-related effects on Atlantic cod ELS.
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Affiliation(s)
| | - Arne Malzahn
- SINTEF Ocean AS, Environment and New Resources, Trondheim, Norway
| | - Andreas Hagemann
- SINTEF Ocean AS, Environment and New Resources, Trondheim, Norway
| | - Julia Farkas
- SINTEF Ocean AS, Environment and New Resources, Trondheim, Norway
| | - Jørgen Skancke
- SINTEF Ocean AS, Environment and New Resources, Trondheim, Norway
| | | | - Trond Nordtug
- SINTEF Ocean AS, Environment and New Resources, Trondheim, Norway
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17
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Horie Y, Yamagishi T, Yagi A, Shintaku Y, Iguchi T, Tatarazako N. The non‐steroidal anti‐inflammatory drug diclofenac sodium induces abnormal embryogenesis and delayed lethal effects in early life stage zebrafish (
Danio rerio
). J Appl Toxicol 2018; 39:622-629. [DOI: 10.1002/jat.3752] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Revised: 10/04/2018] [Accepted: 10/15/2018] [Indexed: 12/14/2022]
Affiliation(s)
- Yoshifumi Horie
- Faculty of Bioresource SciencesAkita Prefectural University 241‐438 Kaidobata‐Nishi, Nakano Simoshinjo Akita 010‐0195 Japan
| | - Takahiro Yamagishi
- Center for Health and Environmental Risk ResearchNational Institute for Environmental Studies 16‐2 Onogawa, Tsukuba Ibaraki 305‐8506 Japan
| | - Ayano Yagi
- Center for Health and Environmental Risk ResearchNational Institute for Environmental Studies 16‐2 Onogawa, Tsukuba Ibaraki 305‐8506 Japan
| | - Yoko Shintaku
- Center for Health and Environmental Risk ResearchNational Institute for Environmental Studies 16‐2 Onogawa, Tsukuba Ibaraki 305‐8506 Japan
| | - Taisen Iguchi
- Graduate School of NanobioscienceYokohama City University 22‐2 Seto, Kanazawa‐ku Yokohama 236‐0027 Japan
| | - Norihisa Tatarazako
- Graduate School of AgricultureEhime University Tarumi 3‐5‐7 Matsuyama 790‐8566 Japan
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18
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Trac LN, Schmidt SN, Mayer P. Headspace passive dosing of volatile hydrophobic chemicals - Aquatic toxicity testing exactly at the saturation level. CHEMOSPHERE 2018; 211:694-700. [PMID: 30098565 DOI: 10.1016/j.chemosphere.2018.07.150] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Revised: 07/23/2018] [Accepted: 07/24/2018] [Indexed: 06/08/2023]
Abstract
It is challenging to conduct aquatic tests with highly hydrophobic and volatile chemicals while avoiding substantial sorptive and evaporative losses. A simple and versatile headspace passive dosing (HS-PD) method was thus developed for such chemicals: The pure liquid test chemical was added to a glass insert, which was then placed with the open end in the headspace of a closed test system containing aqueous test medium. The test chemical served as the dominating partitioning donor for establishing and maintaining maximum exposure levels in the headspace and aqueous solution, without direct contact between the donor and the test medium. The HS-PD method was cross validated against passive dosing with a saturated silicone elastomer, using headspace gas chromatography as analytical instrument and saturated vapors as reference. The HS-PD method was then applied to control the exposure in algal growth inhibition tests with the green algae Raphidocelis subcapitata. The model chemicals were C9-C14 n-alkanes and the cyclic volatile methyl siloxanes octamethyltetracyclosiloxane (D4) and decamethylpentacyclosiloxane (D5). Growth rate inhibition at the solubility limit was 100% for C9-C13 n-alkanes and 53 ± 31% (95% CI) for tetradecane. A moderate inhibition of 11 ± 4% (95% CI) was observed for D4, whereas no inhibition was observed for D5. The present study introduces an effective method for aquatic toxicity testing of a difficult-to-test group of chemicals and provides an improved experimental basis for investigating toxicity cut-offs.
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Affiliation(s)
- Lam Ngoc Trac
- Department of Environmental Engineering, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark.
| | - Stine Nørgaard Schmidt
- Department of Environmental Engineering, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
| | - Philipp Mayer
- Department of Environmental Engineering, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
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19
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Castro M, Breitholtz M, Yuan B, Athanassiadis I, Asplund L, Sobek A. Partitioning of Chlorinated Paraffins (CPs) to Daphnia magna Overlaps between Restricted and in-Use Categories. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:9713-9721. [PMID: 30074385 DOI: 10.1021/acs.est.8b00865] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Chlorinated paraffins (CPs) are high-production volume industrial chemicals consisting of n-alkanes (with 10 to 30 carbon atoms in the chain) with chlorine content from 30 to 70% of weight. In Europe, the use of short chain chlorinated paraffins (SCCPs) has been restricted by the Stockholm Convention on POPs due to their PBT (persistent, bioaccumulative and toxic) properties. Medium (MCCPs) and long chain (LCCPs) chlorinated paraffins are used as substitution products. In this work we studied the partitioning behavior of five different CP technical mixtures from the established categories (2 SCCPs, 1 MCCP, 1 LCCP and 1 CP technical mixture covering all categories) using passive dosing, by determining the partitioning coefficient of CP technical mixtures between silicone and water ( Ksilicone-water) as well as between organic matter and water ( Koc-water). We show that both silicone-water and organic carbon-water partition coefficients overlap between different categories of CP technical mixtures. These results indicate that in-use MCCPs and LCCPs may be equally or more bioaccumulative than restricted SCCPs. For the tested mixtures, both chlorine content and carbon chain length showed a significant correlation with both Ksilicone-water and Koc-water.
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Affiliation(s)
- Mafalda Castro
- Department of Environmental Science and Analytical Chemistry (ACES) , Stockholm University , 106-91 Stockholm , Sweden
| | - Magnus Breitholtz
- Department of Environmental Science and Analytical Chemistry (ACES) , Stockholm University , 106-91 Stockholm , Sweden
| | - Bo Yuan
- Department of Environmental Science and Analytical Chemistry (ACES) , Stockholm University , 106-91 Stockholm , Sweden
| | - Ioannis Athanassiadis
- Department of Environmental Science and Analytical Chemistry (ACES) , Stockholm University , 106-91 Stockholm , Sweden
| | - Lillemor Asplund
- Department of Environmental Science and Analytical Chemistry (ACES) , Stockholm University , 106-91 Stockholm , Sweden
| | - Anna Sobek
- Department of Environmental Science and Analytical Chemistry (ACES) , Stockholm University , 106-91 Stockholm , Sweden
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20
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Gobas FA, Mayer P, Parkerton TF, Burgess RM, van de Meent D, Gouin T. A chemical activity approach to exposure and risk assessment of chemicals: Focus articles are part of a regular series intended to sharpen understanding of current and emerging topics of interest to the scientific community. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2018; 37:1235-1251. [PMID: 29697868 PMCID: PMC5994922 DOI: 10.1002/etc.4091] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Revised: 10/16/2017] [Accepted: 01/11/2018] [Indexed: 05/29/2023]
Abstract
To support the goals articulated in the vision for exposure and risk assessment in the twenty-first century, we highlight the application of a thermodynamic chemical activity approach for the exposure and risk assessment of chemicals in the environment. The present article describes the chemical activity approach, its strengths and limitations, and provides examples of how this concept may be applied to the management of single chemicals and chemical mixtures. The examples demonstrate that the chemical activity approach provides a useful framework for 1) compiling and evaluating exposure and toxicity information obtained from many different sources, 2) expressing the toxicity of single and multiple chemicals, 3) conducting hazard and risk assessments of single and multiple chemicals, 4) identifying environmental exposure pathways, and 5) reducing error and characterizing uncertainty in risk assessment. The article further illustrates that the chemical activity approach can support an adaptive management strategy for environmental stewardship of chemicals where "safe" chemical activities are established based on toxicological studies and presented as guidelines for environmental quality in various environmental media that can be monitored by passive sampling and other techniques. Environ Toxicol Chem 2018;37:1235-1251. © 2018 The Authors. Published by Wiley Periodicals, Inc. on behalf of SETAC.
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Affiliation(s)
- Frank A.P.C. Gobas
- Resource and Environmental Management, Simon Fraser University, Burnaby, British Columbia, Canada
| | - Philipp Mayer
- DTU Environment, Department of Environmental Engineering, Technical University of Denmark, Lyngby, Denmark
| | - Thomas F. Parkerton
- Toxicology & Environmental Science Division, ExxonMobil Biomedical Sciences, Houston, Texas, USA
| | - Robert M. Burgess
- US Environmental Protection Agency, ORD/NHEERL, Atlantic Ecology Division, Narragansett, Rhode Island
| | - Dik van de Meent
- Department of Environmental Science, Radboud University Nijmegen, Nijmegen, The Netherlands
| | - Todd Gouin
- TG Environmental Research, Sharnbrook, Bedfordshire, United Kingdom
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21
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Sobanska M, Scholz S, Nyman AM, Cesnaitis R, Gutierrez Alonso S, Klüver N, Kühne R, Tyle H, de Knecht J, Dang Z, Lundbergh I, Carlon C, De Coen W. Applicability of the fish embryo acute toxicity (FET) test (OECD 236) in the regulatory context of Registration, Evaluation, Authorisation, and Restriction of Chemicals (REACH). ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2018; 37:657-670. [PMID: 29226368 DOI: 10.1002/etc.4055] [Citation(s) in RCA: 79] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Revised: 08/11/2017] [Accepted: 12/04/2017] [Indexed: 06/07/2023]
Abstract
In 2013 the Organisation for Economic Co-operation and Development (OECD) test guideline (236) for fish embryo acute toxicity (FET) was adopted. It determines the acute toxicity of chemicals to embryonic fish. Previous studies show a good correlation of FET with the standard acute fish toxicity (AFT) test; however, the potential of the FET test to predict AFT, which is required by the Registration, Evaluation, Authorisation, and Restriction of Chemicals (REACH) regulation (EC 1907/2006) and the Classification, Labelling and Packaging (CLP) Regulation (EC 1272/2008), has not yet been fully clarified. In 2015 the European Chemicals Agency (ECHA) requested that a consultant perform a scientific analysis of the applicability of FET to predict AFT. The purpose was to compare the toxicity of substances to fish embryos and to adult fish, and to investigate whether certain factors (e.g., physicochemical properties, modes of action, or chemical structures) could be used to define the applicability boundaries of the FET test. Given the limited data availability, the analysis focused on organic substances. The present critical review summarizes the main findings and discusses regulatory application of the FET test under REACH. Given some limitations (e.g., neurotoxic mode of action) and/or remaining uncertainties (e.g., deviation of some narcotic substances), it has been found that the FET test alone is currently not sufficient to meet the essential information on AFT as required by the REACH regulation. However, the test may be used within weight-of-evidence approaches together with other independent, relevant, and reliable sources of information. The present review also discusses further research needs that may overcome the remaining uncertainties and help to increase acceptance of FET as a replacement for AFT in the future. For example, an increase in the availability of data generated according to OECD test guideline 236 may provide evidence of a higher predictive power of the test. Environ Toxicol Chem 2018;37:657-670. © 2017 SETAC.
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Affiliation(s)
| | - Stefan Scholz
- Department of Bioanalytical Ecotoxicology, Helmholtz Centre for Environmental Research - UFZ, Leipzig, Germany
| | | | | | | | - Nils Klüver
- Department of Cell Toxicology, Helmholtz Centre for Environmental Research - UFZ, Leipzig, Germany
| | - Ralph Kühne
- Department of Ecological Chemistry, Helmholtz Centre for Environmental Research - UFZ, Leipzig, Germany
| | - Henrik Tyle
- Danish Environmental Protection Agency, Copenhagen, Denmark
| | - Joop de Knecht
- Centre for Safety of Substances and Products, National Institute for Public Health and the Environment (RIVM), Bilthoven, The Netherlands
| | - Zhichao Dang
- Centre for Safety of Substances and Products, National Institute for Public Health and the Environment (RIVM), Bilthoven, The Netherlands
| | | | | | - Wim De Coen
- European Chemicals Agency, Helsinki, Finland
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22
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Kim K, Jeon HJ, Choi SD, Tsang DCW, Oleszczuk P, Ok YS, Lee HS, Lee SE. Combined toxicity of endosulfan and phenanthrene mixtures and induced molecular changes in adult Zebrafish (Danio rerio). CHEMOSPHERE 2018; 194:30-41. [PMID: 29197246 DOI: 10.1016/j.chemosphere.2017.11.128] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Revised: 10/23/2017] [Accepted: 11/22/2017] [Indexed: 06/07/2023]
Abstract
Individual and combined toxicities of endosulfan (ENDO) with phenanthrene (PHE) were evaluated using zebrafish (Danio rerio) adults. The 96-h LC50 values for ENDO and PHE were 4.6 μg L-1 and 920 μg L-1, respectively. To evaluate the mixture toxicity, LC10 and LC50 concentrations were grouped into four combinations as ENDO-LC10 + PHE-LC10, ENDO-LC10 + PHE-LC50, ENDO-LC50 + PHE-LC10, and ENDO-LC50 + PHE-LC50, and their acute toxicities were determined. The combination of LC50-ENDO and LC10-PHE exhibited a synergistic effect. In addition, acetylcholinesterase activity decreased in zebrafish bodies exposed to ENDO with or without PHE. Combined treatments induced higher glutathione S-transferase activity compared to individual treatments. Carboxylesterase activity increased in both heads and bodies of ENDO-treated fishes compared with PHE-treated fishes. Using RT-qPCR technique, CYP1A gene expression significantly up-regulated in all combinations, whereas CYP3A was unchanged, suggesting that enzymes involved in defense may play different roles in the detoxification. CYP7A1 gene responsible for bile acid biosynthesis is dramatically down-regulated after exposure to the synergistic combination exposure, referring that the synergistic effect may be resulted from the reduction of bile production in zebrafishes. Among gender-related genes, CYP11A1 and CYP17A1 genes in female zebrafish decreased after treatment with ENDO alone and combination of LC50-ENDO and LC10-PHE. This might be related to a reduction in cortisol production. The overall results indicated that ENDO and PHE were toxic to zebrafish adults both individually and in combination, and that their co-presence induced changes in the expression of genes responsible for metabolic processes and defense mechanisms.
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Affiliation(s)
- Kyeongnam Kim
- School of Applied Biosciences, Kyungpook National University, Daegu, 41566, Republic of Korea
| | - Hwang-Ju Jeon
- School of Applied Biosciences, Kyungpook National University, Daegu, 41566, Republic of Korea
| | - Sung-Deuk Choi
- School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Daniel C W Tsang
- Department of Civil and Environmental Engineering, Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
| | - Patryk Oleszczuk
- Department of Environmental Chemistry, Faculty of Chemistry, Maria Sklodowska-Curie University, Maria Curie-Sklodowska Square 3, 20-031, Lublin, Poland
| | - Yong Sik Ok
- O-Jeong Eco-Resilience Institute (OJERI), Division of Environmental Science and Ecological Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Hoi-Seon Lee
- Department of Bioenvironmental Chemistry, Chonbuk National University, Jeonju, 54896, Republic of Korea
| | - Sung-Eun Lee
- School of Applied Biosciences, Kyungpook National University, Daegu, 41566, Republic of Korea.
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23
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Neale PA, Altenburger R, Aït-Aïssa S, Brion F, Busch W, de Aragão Umbuzeiro G, Denison MS, Du Pasquier D, Hilscherová K, Hollert H, Morales DA, Novák J, Schlichting R, Seiler TB, Serra H, Shao Y, Tindall AJ, Tollefsen KE, Williams TD, Escher BI. Development of a bioanalytical test battery for water quality monitoring: Fingerprinting identified micropollutants and their contribution to effects in surface water. WATER RESEARCH 2017; 123:734-750. [PMID: 28728110 DOI: 10.1016/j.watres.2017.07.016] [Citation(s) in RCA: 146] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Revised: 06/04/2017] [Accepted: 07/07/2017] [Indexed: 05/18/2023]
Abstract
Surface waters can contain a diverse range of organic pollutants, including pesticides, pharmaceuticals and industrial compounds. While bioassays have been used for water quality monitoring, there is limited knowledge regarding the effects of individual micropollutants and their relationship to the overall mixture effect in water samples. In this study, a battery of in vitro bioassays based on human and fish cell lines and whole organism assays using bacteria, algae, daphnids and fish embryos was assembled for use in water quality monitoring. The selection of bioassays was guided by the principles of adverse outcome pathways in order to cover relevant steps in toxicity pathways known to be triggered by environmental water samples. The effects of 34 water pollutants, which were selected based on hazard quotients, available environmental quality standards and mode of action information, were fingerprinted in the bioassay test battery. There was a relatively good agreement between the experimental results and available literature effect data. The majority of the chemicals were active in the assays indicative of apical effects, while fewer chemicals had a response in the specific reporter gene assays, but these effects were typically triggered at lower concentrations. The single chemical effect data were used to improve published mixture toxicity modeling of water samples from the Danube River. While there was a slight increase in the fraction of the bioanalytical equivalents explained for the Danube River samples, for some endpoints less than 1% of the observed effect could be explained by the studied chemicals. The new mixture models essentially confirmed previous findings from many studies monitoring water quality using both chemical analysis and bioanalytical tools. In short, our results indicate that many more chemicals contribute to the biological effect than those that are typically quantified by chemical monitoring programs or those regulated by environmental quality standards. This study not only demonstrates the utility of fingerprinting single chemicals for an improved understanding of the biological effect of pollutants, but also highlights the need to apply bioassays for water quality monitoring in order to prevent underestimation of the overall biological effect.
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Affiliation(s)
- Peta A Neale
- Australian Rivers Institute, Griffith School of Environment, Griffith University, Southport, QLD, 4222, Australia; The University of Queensland, National Research Centre for Environmental Toxicology (Entox), Brisbane, QLD, 4108, Australia
| | - Rolf Altenburger
- UFZ - Helmholtz Centre for Environmental Research, 04318 Leipzig, Germany
| | - Selim Aït-Aïssa
- Institut National de l'Environnement Industriel et des Risques INERIS, Unité d'Ecotoxicologie, 60550, Verneuil-en-Halatte, France
| | - François Brion
- Institut National de l'Environnement Industriel et des Risques INERIS, Unité d'Ecotoxicologie, 60550, Verneuil-en-Halatte, France
| | - Wibke Busch
- UFZ - Helmholtz Centre for Environmental Research, 04318 Leipzig, Germany
| | | | - Michael S Denison
- Department of Environmental Toxicology, University of California, Davis, CA, 95616, United States
| | - David Du Pasquier
- WatchFrog, Bâtiment Genavenir 3, 1 rue Pierre Fontaine, 91000 Evry, France
| | - Klára Hilscherová
- Masaryk University, Research Centre for Toxic Compounds in the Environment (RECETOX), Kamenice 753/5, 62500 Brno, Czech Republic
| | - Henner Hollert
- Department of Ecosystem Analysis, Institute for Environmental Research, RWTH Aachen University, 52074 Aachen, Germany
| | - Daniel A Morales
- School of Technology, University of Campinas, Limeira, SP, 13484-332, Brazil
| | - Jiří Novák
- Masaryk University, Research Centre for Toxic Compounds in the Environment (RECETOX), Kamenice 753/5, 62500 Brno, Czech Republic
| | - Rita Schlichting
- UFZ - Helmholtz Centre for Environmental Research, 04318 Leipzig, Germany
| | - Thomas-Benjamin Seiler
- Department of Ecosystem Analysis, Institute for Environmental Research, RWTH Aachen University, 52074 Aachen, Germany
| | - Helene Serra
- Institut National de l'Environnement Industriel et des Risques INERIS, Unité d'Ecotoxicologie, 60550, Verneuil-en-Halatte, France
| | - Ying Shao
- Department of Ecosystem Analysis, Institute for Environmental Research, RWTH Aachen University, 52074 Aachen, Germany
| | - Andrew J Tindall
- WatchFrog, Bâtiment Genavenir 3, 1 rue Pierre Fontaine, 91000 Evry, France
| | - Knut Erik Tollefsen
- Norwegian Institute for Water Research NIVA, Gaustadalléen 21, 0349 Oslo, Norway
| | - Timothy D Williams
- School of Biosciences, The University of Birmingham, Birmingham, B15 2TT, UK
| | - Beate I Escher
- The University of Queensland, National Research Centre for Environmental Toxicology (Entox), Brisbane, QLD, 4108, Australia; UFZ - Helmholtz Centre for Environmental Research, 04318 Leipzig, Germany; Eberhard Karls University Tübingen, Environmental Toxicology, Center for Applied Geosciences, 72074 Tübingen, Germany.
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24
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Oliveira IB, Groh KJ, Schönenberger R, Barroso C, Thomas KV, Suter MJF. Toxicity of emerging antifouling biocides to non-target freshwater organisms from three trophic levels. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2017; 191:164-174. [PMID: 28843204 DOI: 10.1016/j.aquatox.2017.07.019] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2017] [Revised: 07/20/2017] [Accepted: 07/30/2017] [Indexed: 06/07/2023]
Abstract
Antifouling (AF) systems provide the most cost-effective protection against biofouling. Several AF biocides have, however, caused deleterious effects in the environment. Subsequently, new compounds have emerged that claim to be more environment-friendly, but studies on their toxicity and environmental risk are necessary in order to ensure safety. This work aimed to assess the toxicity of three emerging AF biocides, tralopyril, triphenylborane pyridine (TPBP) and capsaicin, towards non-target freshwater organisms representing three trophic levels: algae (Chlamydomonas reinhardtii), crustacean (Daphnia magna) and fish (Danio rerio). From the three tested biocides, tralopyril had the strongest inhibitory effect on C. reinhardtii growth, effective quantum yield and adenosine triphosphate (ATP) content. TPBP caused sub-lethal effects at high concentrations (100 and 250μgL-1), and capsaicin had no significant effects on algae. In the D. magna acute immobilisation test, the most toxic compound was TPBP. However, tralopyril has a short half-life and quickly degrades in water. With exposure solution renewals, tralopyril's toxicity was similar to TPBP. Capsaicin did not cause any effects on daphnids. In the zebrafish embryo toxicity test (zFET) the most toxic compound was tralopyril with a 120h - LC50 of 5μgL-1. TPBP's 120h - LC50 was 447.5μgL-1. Capsaicin did not cause mortality in zebrafish up to 1mgL-1. Sub-lethal effects on the proteome of zebrafish embryos were analysed for tralopyril and TPBP. Both general stress-related and compound-specific protein changes were observed. Five proteins involved in energy metabolism, eye structure and cell differentiation were commonly regulated by both compounds. Tralopyril specifically induced the upregulation of 6 proteins implicated in energy metabolism, cytoskeleton, cell division and mRNA splicing whilst TPBP lead to the upregulation of 3 proteins involved in cytoskeleton, cell growth and protein folding. An ecological risk characterization was performed for a hypothetical freshwater marina. This analysis identified capsaicin as an environment-friendly compound while tralopyril and TPBP seem to pose a risk to freshwater ecosystems. Noneless, more studies on the characterization of the toxicity, behaviour and fate of these AF biocides in the environment are necessary since this information directly affects the outcome of the risk assessment.
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Affiliation(s)
- Isabel B Oliveira
- Biology Department & CESAM, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal; Eawag-Swiss Federal Institute of Aquatic Science and Technology, 8600 Dübendorf, Switzerland.
| | - Ksenia J Groh
- Eawag-Swiss Federal Institute of Aquatic Science and Technology, 8600 Dübendorf, Switzerland; Food Packaging Forum Foundation, 8045 Zürich, Switzerland
| | - Rene Schönenberger
- Eawag-Swiss Federal Institute of Aquatic Science and Technology, 8600 Dübendorf, Switzerland
| | - Carlos Barroso
- Biology Department & CESAM, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
| | - Kevin V Thomas
- Norwegian Institute for Water Research (NIVA), 0349 Oslo, Norway; Queensland Alliance for Environmental Health Sciences(QAEHS), University of Queensland, 39 Kessels Road, Coopers Plains, 4108 Queensland, Australia
| | - Marc J-F Suter
- Eawag-Swiss Federal Institute of Aquatic Science and Technology, 8600 Dübendorf, Switzerland; ETH-Swiss Federal Institute of Technology, 8093 Zürich, Switzerland
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25
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Horie Y, Yamagishi T, Takahashi H, Shintaku Y, Iguchi T, Tatarazako N. Assessment of the lethal and sublethal effects of 20 environmental chemicals in zebrafish embryos and larvae by using OECD TG 212. J Appl Toxicol 2017; 37:1245-1253. [DOI: 10.1002/jat.3487] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2016] [Revised: 04/07/2017] [Accepted: 04/07/2017] [Indexed: 01/09/2023]
Affiliation(s)
- Yoshifumi Horie
- Center for Health and Environmental Risk Research; National Institute for Environmental Studies; 16-2 Onogawa Tsukuba Ibaraki 305-8506 Japan
| | - Takahiro Yamagishi
- Center for Health and Environmental Risk Research; National Institute for Environmental Studies; 16-2 Onogawa Tsukuba Ibaraki 305-8506 Japan
| | - Hiroko Takahashi
- Center for Health and Environmental Risk Research; National Institute for Environmental Studies; 16-2 Onogawa Tsukuba Ibaraki 305-8506 Japan
| | - Youko Shintaku
- Center for Health and Environmental Risk Research; National Institute for Environmental Studies; 16-2 Onogawa Tsukuba Ibaraki 305-8506 Japan
| | - Taisen Iguchi
- Nanobioscience; Yokohama City University; 22-2 Seto Kanazawa-ku Yokohama 236-0027 Japan
| | - Norihisa Tatarazako
- Center for Health and Environmental Risk Research; National Institute for Environmental Studies; 16-2 Onogawa Tsukuba Ibaraki 305-8506 Japan
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26
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Stibany F, Ewald F, Miller I, Hollert H, Schäffer A. Improving the reliability of aquatic toxicity testing of hydrophobic chemicals via equilibrium passive dosing - A multiple trophic level case study on bromochlorophene. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 584-585:96-104. [PMID: 28142058 DOI: 10.1016/j.scitotenv.2017.01.082] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Revised: 01/13/2017] [Accepted: 01/13/2017] [Indexed: 04/15/2023]
Abstract
The main objective of the present study was to improve the reliability and practicability of aquatic toxicity testing of hydrophobic chemicals based upon the model substance bromochlorophene (BCP). Therefore, we adapted a passive dosing format to test the toxicity of BCP at different concentrations and in multiple test systems with aquatic organisms of various trophic levels. At the same time, the method allowed for the accurate determination of exposure concentrations (i.e., in the presence of exposed organisms; Ctest) and freely dissolved concentrations (i.e., without organisms present; Cfree) of BCP in all tested media. We report on the joint adaptation of three ecotoxicity tests - algal growth inhibition, Daphnia magna immobilization, and fish-embryo toxicity - to a silicone O-ring based equilibrium passive dosing format. Effect concentrations derived by passive dosing methods were compared with corresponding effect concentrations derived by standard co-solvent setups. The passive dosing format led to EC50-values in the lower μgL-1 range for algae, daphnids, and fish embryos, whereas increased effect concentrations were measured in the co-solvent setups for algae and daphnids. This effect once more shows that passive dosing might offer advantages over standard methods like co-solvent setups when it comes to a reliable risk assessment of hydrophobic substances. The presented passive dosing setup offers a facilitated, practical, and repeatable way to test hydrophobic chemicals on their toxicity to aquatic organisms, and is an ideal basis for the detailed investigation of this important group of chemicals.
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Affiliation(s)
- Felix Stibany
- Institute for Environmental Research (Biology V), RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany.
| | - Franziska Ewald
- Institute for Environmental Research (Biology V), RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany
| | - Ina Miller
- Institute for Environmental Research (Biology V), RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany
| | - Henner Hollert
- Institute for Environmental Research (Biology V), RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany
| | - Andreas Schäffer
- Institute for Environmental Research (Biology V), RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany
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27
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Mayer P, Schmidt SN. Comment on "Assessing Aromatic-Hydrocarbon Toxicity to Fish Early Life Stages Using Passive-Dosing Methods and Target-Lipid and Chemical-Activity Models". ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:3584-3585. [PMID: 28263561 DOI: 10.1021/acs.est.6b06416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Affiliation(s)
- Philipp Mayer
- Technical University of Denmark , Department of Environmental Engineering, Building 115, 2800 Kgs. Lyngby, Denmark
| | - Stine Nørgaard Schmidt
- Technical University of Denmark , Department of Environmental Engineering, Building 115, 2800 Kgs. Lyngby, Denmark
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28
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Horie Y, Yamagishi T, Koshio M, Iguchi T, Tatarazako N. Lethal and sublethal effects of aniline and chlorinated anilines on zebrafish embryos and larvae. J Appl Toxicol 2017; 37:836-841. [DOI: 10.1002/jat.3431] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2016] [Revised: 12/06/2016] [Accepted: 12/07/2016] [Indexed: 12/24/2022]
Affiliation(s)
- Yoshifumi Horie
- Center for Health and Environmental Risk Research; National Institute for Environmental Studies; 16-2 Onogawa Tsukuba 305-8506 Ibaraki Japan
| | - Takahiro Yamagishi
- Center for Health and Environmental Risk Research; National Institute for Environmental Studies; 16-2 Onogawa Tsukuba 305-8506 Ibaraki Japan
| | - Masaaki Koshio
- Center for Health and Environmental Risk Research; National Institute for Environmental Studies; 16-2 Onogawa Tsukuba 305-8506 Ibaraki Japan
| | - Taisen Iguchi
- Nanobioscience; Yokohama City University; 22-2 Seto, Kanazawa-ku Yokohama 236-0027 Japan
| | - Norihisa Tatarazako
- Center for Health and Environmental Risk Research; National Institute for Environmental Studies; 16-2 Onogawa Tsukuba 305-8506 Ibaraki Japan
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29
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Stibany F, Schmidt SN, Schäffer A, Mayer P. Aquatic toxicity testing of liquid hydrophobic chemicals - Passive dosing exactly at the saturation limit. CHEMOSPHERE 2017; 167:551-558. [PMID: 27770722 DOI: 10.1016/j.chemosphere.2016.10.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Revised: 09/30/2016] [Accepted: 10/03/2016] [Indexed: 06/06/2023]
Abstract
The aims of the present study were (1) to develop a passive dosing approach for aquatic toxicity testing of liquid substances with very high Kow values and (2) to apply this approach to the model substance dodecylbenzene (DDB, Log Kow = 8.65). The first step was to design a new passive dosing format for testing DDB exactly at its saturation limit. Silicone O-rings were saturated by direct immersion in pure liquid DDB, which resulted in swelling of >14%. These saturated O-rings were used to establish and maintain DDB exposure exactly at the saturation limit throughout 72-h algal growth inhibition tests with green algae Raphidocelis subcapitata. Growth rate inhibition at DDB solubility was 13 ± 5% (95% CI) in a first and 8 ± 3% (95% CI) in a repeated test, which demonstrated that improved exposure control can lead to good precision and repeatability of toxicity tests. This moderate toxicity at chemical activity of unity was higher than expected relative to a reported hydrophobicity cut-off in toxicity, but lower than expected relative to a reported chemical activity range for baseline toxicity. The present study introduces a new effective approach for toxicity testing of an important group of challenging chemicals, while providing a basis for investigating toxicity cut-off theories.
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Affiliation(s)
- Felix Stibany
- Institute for Environmental Research (Biology V), RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany; Department of Environmental Engineering, Technical University of Denmark, Bygningstorvet B115, DK-2800 Kongens Lyngby, Denmark.
| | - Stine Nørgaard Schmidt
- Department of Environmental Engineering, Technical University of Denmark, Bygningstorvet B115, DK-2800 Kongens Lyngby, Denmark
| | - Andreas Schäffer
- Institute for Environmental Research (Biology V), RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany
| | - Philipp Mayer
- Department of Environmental Engineering, Technical University of Denmark, Bygningstorvet B115, DK-2800 Kongens Lyngby, Denmark
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30
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Fischer F, Böhm L, Höss S, Möhlenkamp C, Claus E, Düring RA, Schäfer S. Passive Dosing in Chronic Toxicity Tests with the Nematode Caenorhabditis elegans. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:9708-9716. [PMID: 27494096 DOI: 10.1021/acs.est.6b02956] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In chronic toxicity tests with Caenorhabditis elegans, it is necessary to feed the nematode with bacteria, which reduces the freely dissolved concentration (Cfree) of hydrophobic organic chemicals (HOCs), leading to poorly defined exposure with conventional dosing procedures. We examined the efficacy of passive dosing of polycyclic aromatic hydrocarbons (PAHs) using silicone O-rings to control exposure during C. elegans toxicity testing and compared the results to those obtained with solvent spiking. Solid-phase microextraction and liquid-liquid extraction were used to measure Cfree and the chemicals taken up via ingestion. During toxicity testing, Cfree decreased by up to 89% after solvent spiking but remained constant with passive dosing. This led to a higher apparent toxicity on C. elegans exposed by passive dosing than by solvent spiking. With increasing bacterial cell densities, Cfree of solvent-spiked PAHs decreased while being maintained constant with passive dosing. This resulted in lower apparent toxicity under solvent spiking but an increased apparent toxicity with passive dosing, probably as a result of the higher chemical uptake rate via food (CUfood). Our results demonstrate the utility of passive dosing to control Cfree in routine chronic toxicity testing of HOCs. Moreover, both chemical uptake from water or via food ingestion can be controlled, thus enabling the discrimination of different uptake routes in chronic toxicity studies.
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Affiliation(s)
- Fabian Fischer
- German Federal Institute of Hydrology (BfG) , Am Mainzer Tor 1, 56068 Koblenz, Germany
- Institute of Soil Science and Soil Conservation, Research Center for BioSystems, Land Use, and Nutrition (iFZ), Justus Liebig University Giessen , Heinrich-Buff-Ring 26-32, 35392 Giessen, Germany
| | - Leonard Böhm
- Institute of Soil Science and Soil Conservation, Research Center for BioSystems, Land Use, and Nutrition (iFZ), Justus Liebig University Giessen , Heinrich-Buff-Ring 26-32, 35392 Giessen, Germany
| | | | - Christel Möhlenkamp
- German Federal Institute of Hydrology (BfG) , Am Mainzer Tor 1, 56068 Koblenz, Germany
| | - Evelyn Claus
- German Federal Institute of Hydrology (BfG) , Am Mainzer Tor 1, 56068 Koblenz, Germany
| | - Rolf-Alexander Düring
- Institute of Soil Science and Soil Conservation, Research Center for BioSystems, Land Use, and Nutrition (iFZ), Justus Liebig University Giessen , Heinrich-Buff-Ring 26-32, 35392 Giessen, Germany
| | - Sabine Schäfer
- German Federal Institute of Hydrology (BfG) , Am Mainzer Tor 1, 56068 Koblenz, Germany
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31
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Butler JD, Parkerton TF, Redman AD, Letinski DJ, Cooper KR. Assessing Aromatic-Hydrocarbon Toxicity to Fish Early Life Stages Using Passive-Dosing Methods and Target-Lipid and Chemical-Activity Models. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:8305-8315. [PMID: 27398931 DOI: 10.1021/acs.est.6b01758] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Aromatic hydrocarbons (AH) are known to impair fish early life stages (ELS). However, poorly defined exposures often confound ELS-test interpretation. Passive dosing (PD) overcomes these challenges by delivering consistent, controlled exposures. The objectives of this study were to apply PD to obtain 5 d acute embryo lethality and developmental data and 30 d chronic embryo-larval survival and growth-effects data using zebrafish with different AHs; to analyze study and literature toxicity data using target-lipid (TLM) and chemical-activity (CA) models; and to extend PD to a mixture and test the assumption of AH additivity. PD maintained targeted exposures over a concentration range of 6 orders of magnitude. AH toxicity increased with log Kow up to pyrene (5.2). Pericardial edema was the most sensitive sublethal effect that often preceded embryo mortality, although some AHs did not produce developmental effects at concentrations causing mortality. Cumulative embryo-larval mortality was more sensitive than larval growth, with acute-to-chronic ratios of <10. More-hydrophobic AHs did not exhibit toxicity at aqueous saturation. The relationship and utility of the TLM-CA models for characterizing fish ELS toxicity is discussed. Application of these models indicated that concentration addition provided a conservative basis for predicting ELS effects for the mixture investigated.
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Affiliation(s)
- Josh D Butler
- Toxicology & Environmental Sciences Division, ExxonMobil Biomedical Sciences, Inc. , 1545 US Highway 22 East, Annandale, New Jersey 08801, United States
| | - Thomas F Parkerton
- Toxicology & Environmental Sciences Division, ExxonMobil Biomedical Sciences, Inc. , 800 Bell Street, Houston, Texas 77002, United States
| | - Aaron D Redman
- Toxicology & Environmental Sciences Division, ExxonMobil Biomedical Sciences, Inc. , 1545 US Highway 22 East, Annandale, New Jersey 08801, United States
| | - Daniel J Letinski
- Toxicology & Environmental Sciences Division, ExxonMobil Biomedical Sciences, Inc. , 1545 US Highway 22 East, Annandale, New Jersey 08801, United States
| | - Keith R Cooper
- Environmental Sciences Department, Rutgers University , 14 College Farm Road, New Brunswick, New Jersey 08901, United States
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32
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Sogbanmu TO, Nagy E, Phillips DH, Arlt VM, Otitoloju AA, Bury NR. Lagos lagoon sediment organic extracts and polycyclic aromatic hydrocarbons induce embryotoxic, teratogenic and genotoxic effects in Danio rerio (zebrafish) embryos. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:14489-501. [PMID: 27068906 PMCID: PMC4943991 DOI: 10.1007/s11356-016-6490-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2015] [Accepted: 03/16/2016] [Indexed: 05/04/2023]
Abstract
An expansion of anthropogenic activity around Lagos lagoon, Nigeria, has raised concerns over increasing contaminants entering the lagoon's ecosystem. The embryotoxicity, teratogenicity and genotoxicity of sediment organic extracts from four sampling zones around Lagos lagoon, Ilaje, Iddo, Atlas Cove and Apapa, as well as the dominant polycyclic aromatic hydrocarbons (PAHs) identified in water measured during the wet season (naphthalene, phenanthrene, pyrene, benzo[a]pyrene and a mixture of these), were assessed with Danio rerio embryos. Embryos were exposed to varying concentrations of toxicants from 0-72 h post-fertilization (hpf). Embryotoxicity at 72 hpf showed a dose-dependent increase in mortality upon exposure to extracts from all zones, except Atlas Cove. Similarly, higher levels of teratogenic effects, such as increased oedema, and haemorrhage and developmental abnormalities resulted from exposure to extracts from Ilaje, Iddo and Apapa zones. Treatment with single PAHs revealed that significant levels of detrimental effects were obtained only for phenanthrene. The modified comet assay revealed that the oxidative damage to DNA was generally low (<12 %) overall for all sediment extracts, but was significantly elevated with Ilaje and Iddo sediment extracts when compared with solvent controls. Oxidative damage was observed with the single PAHs, phenanthrene and benzo[a]pyrene, as well as with the PAH mixture. This study highlights that Lagos lagoon sediment extracts have teratogenic, embryotoxic and genotoxic properties, which are likely due to the high molecular weight PAHs present in the extracts, some of which are known or are suspected human carcinogens.
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Affiliation(s)
- Temitope O Sogbanmu
- Ecotoxicology and Conservation Unit, Department of Zoology, Faculty of Science, University of Lagos, Akoka, 101017, Lagos, Nigeria
| | - Eszter Nagy
- Division of Analytical and Environmental Sciences, Faculty of Life Sciences and Medicine, MRC-PHE Centre for Environment and Health, King's College London, Franklin-Wilkins Building, 150 Stamford Street, London, SE1 9NH, UK
| | - David H Phillips
- Division of Analytical and Environmental Sciences, Faculty of Life Sciences and Medicine, MRC-PHE Centre for Environment and Health, King's College London, Franklin-Wilkins Building, 150 Stamford Street, London, SE1 9NH, UK
| | - Volker M Arlt
- Division of Analytical and Environmental Sciences, Faculty of Life Sciences and Medicine, MRC-PHE Centre for Environment and Health, King's College London, Franklin-Wilkins Building, 150 Stamford Street, London, SE1 9NH, UK
| | - Adebayo A Otitoloju
- Ecotoxicology and Conservation Unit, Department of Zoology, Faculty of Science, University of Lagos, Akoka, 101017, Lagos, Nigeria
| | - Nic R Bury
- Division of Diabetes and Nutritional Sciences, Faculty of Life Sciences and Medicine, King's College London, Franklin-Wilkins Building, 150 Stamford Street, London, SE1 9NH, UK.
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33
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Jahnke A, Mayer P, Schäfer S, Witt G, Haase N, Escher BI. Strategies for Transferring Mixtures of Organic Contaminants from Aquatic Environments into Bioassays. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:5424-5431. [PMID: 26804122 DOI: 10.1021/acs.est.5b04687] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Mixtures of organic contaminants are ubiquitous in the environment. Depending on their persistence and physicochemical properties, individual chemicals that make up the mixture partition and distribute within the environment and might then jointly elicit toxicological effects. For the assessment and monitoring of such mixtures, a variety of cell-based in vitro and low-complexity in vivo bioassays based on algae, daphnids or fish embryos are available. A very important and sometimes unrecognized challenge is how to combine sampling, extraction and dosing to transfer the mixtures from the environment into bioassays, while conserving (or re-establishing) their chemical composition at adjustable levels for concentration-effect assessment. This article outlines various strategies for quantifiable transfer from environmental samples including water, sediment, and biota into bioassays using total extraction or polymer-based passive sampling combined with either solvent spiking or passive dosing.
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Affiliation(s)
- Annika Jahnke
- Department of Cell Toxicology, Helmholtz Centre for Environmental Research - UFZ , Permoserstr. 15, DE-04318 Leipzig, Germany
- Department of Environmental Science and Analytical Chemistry (ACES), Stockholm University , Svante Arrhenius väg 8, SE-114 18 Stockholm, Sweden
| | - Philipp Mayer
- Department of Environmental Engineering, Technical University of Denmark , Miljøvej B113, DK-2800 Kongens Lyngby, Denmark
| | - Sabine Schäfer
- Department of Qualitative Hydrology, German Federal Institute of Hydrology (BFG) , Am Mainzer Tor 1, DE-56068 Koblenz, Germany
| | - Gesine Witt
- Department of Environmental Technology, Hamburg University of Applied Sciences , Ulmenliet 20, DE-21033 Hamburg, Germany
| | - Nora Haase
- Department of Cell Toxicology, Helmholtz Centre for Environmental Research - UFZ , Permoserstr. 15, DE-04318 Leipzig, Germany
| | - Beate I Escher
- Department of Cell Toxicology, Helmholtz Centre for Environmental Research - UFZ , Permoserstr. 15, DE-04318 Leipzig, Germany
- Environmental Toxicology, Center for Applied Geoscience, Eberhard Karls University Tübingen , Hölderlinstr. 12, DE-72074 Tübingen, Germany
- National Research Centre for Environmental Toxicology (Entox), The University of Queensland , 39 Kessels Road, Coopers Plains, Queensland 4108, Australia
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Chlebowski AC, Tanguay RL, Simonich SLM. Quantitation and prediction of sorptive losses during toxicity testing of polycyclic aromatic hydrocarbon (PAH) and nitrated PAH (NPAH) using polystyrene 96-well plates. Neurotoxicol Teratol 2016; 57:30-38. [PMID: 27170619 DOI: 10.1016/j.ntt.2016.05.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Revised: 05/02/2016] [Accepted: 05/03/2016] [Indexed: 10/21/2022]
Abstract
Developing zebrafish are increasingly being used for rapid assessments of chemical toxicity, and these assays are frequently conducted in multi-well plastic plates. This study investigated the sorptive behavior of polycyclic aromatic hydrocarbons (PAHs) and nitrated PAHs (NPAHs) to uncoated 96-well polystyrene plates typically used for zebrafish (Danio rerio) testing. We measured the percent sorption in the presence and absence of zebrafish embryos, at two exposure concentrations, as well as using two different procedures (addition of embryos to polystyrene plates either before analyte addition, or allowing 24h of equilibrium between analyte addition and embryo addition to the polystyrene plates). Following exposure, the plates were extracted with hexane and analyzed using gas chromatography coupled with mass spectrometry (GC/MS). Allowing 24h of pre-incubation between the addition of analytes and embryos did not significantly impact the percent sorption. The percent sorption was higher for both PAHs and NPAHs at the lower exposure concentration, and sorption was lower in the presence of zebrafish embryos. A mass balance model was developed to predict the sorption to polystyrene plates, based on the PAH and NPAH mass distribution ratios between polystyrene and water. While PAH sorption was significantly correlated with subcooled liquid solubility, NPAH sorption did not correlate with any of the physical-chemical properties investigated. This indicates the need to better understand the sorptive behavior of hydrophobic analytes to plastics, and to better account for sorptive losses during toxicity testing in polystyrene plates.
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Affiliation(s)
- Anna C Chlebowski
- Department of Environmental and Molecular Toxicology, Oregon State University, 1007 Agriculture and Life Sciences Building, Corvallis, OR 97331, United States.
| | - Robert L Tanguay
- Department of Environmental and Molecular Toxicology, Oregon State University, 1007 Agriculture and Life Sciences Building, Corvallis, OR 97331, United States.
| | - Staci L Massey Simonich
- Department of Environmental and Molecular Toxicology, Oregon State University, 1007 Agriculture and Life Sciences Building, Corvallis, OR 97331, United States; Department of Chemistry, 153A Gilbert Hall, 2100 SW Campus Way, Corvallis, OR 97331, United States.
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