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Liu Q, Deng Z, Chen H, Kim MS, Kim DH, Gu L, Lee JS, Yang Z. Changes in Induced-Antipredation Defense Traits and Transcriptome Regulations of Daphnia magna in Response to 5-HT 1A Receptor Antagonist. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:7577-7587. [PMID: 38630542 DOI: 10.1021/acs.est.3c10720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/19/2024]
Abstract
The serotonin signaling system plays a crucial role in regulating the ontogeny of crustaceans. Here, we describe the effects of different concentrations of the 5-hydroxytryptamine 1A receptor antagonist (WAY-100635) on the induced antipredation (Rhodeus ocellatus as the predator), morphological, behavioral, and life-history defenses of Daphnia magna and use transcriptomics to analyze the underlying molecular mechanisms. Our results indicate that exposure to WAY-100635 leads to changes in the expression of different defensive traits in D. magna when faced with fish predation risks. Specifically, as the length of exposure to WAY-100635 increases, high concentrations of WAY-100635 inhibit defensive responses associated with morphological and reproductive activities but promote the immediate negative phototactic behavioral defense of D. magna. This change is related to the underlying mechanism through which WAY-100635 interferes with gene expression of G-protein-coupled GABA receptors by affecting GABBR1 but promotes serotonin receptor signaling and ecdysteroid signaling pathways. In addition, we also find for the first time that fish kairomone can significantly activate the HIF-1α signaling pathway, which may lead to an increase in the rate of immediate movement. These results can help assess the potential impacts of serotonin-disrupting psychotropic drugs on zooplankton in aquatic ecosystems.
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Affiliation(s)
- Qi Liu
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, School of Biological Sciences, Nanjing Normal University, 1 Wenyuan Road, Nanjing 210023, China
| | - Ziyi Deng
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, School of Biological Sciences, Nanjing Normal University, 1 Wenyuan Road, Nanjing 210023, China
| | - Huafang Chen
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, School of Biological Sciences, Nanjing Normal University, 1 Wenyuan Road, Nanjing 210023, China
| | - Min-Sub Kim
- Department of Biological Sciences, College of Science, Sungkyunkwan University, Suwon 16419, South Korea
| | - Duck-Hyun Kim
- Department of Biological Sciences, College of Science, Sungkyunkwan University, Suwon 16419, South Korea
| | - Lei Gu
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, School of Biological Sciences, Nanjing Normal University, 1 Wenyuan Road, Nanjing 210023, China
| | - Jae-Seong Lee
- Department of Biological Sciences, College of Science, Sungkyunkwan University, Suwon 16419, South Korea
| | - Zhou Yang
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, School of Biological Sciences, Nanjing Normal University, 1 Wenyuan Road, Nanjing 210023, China
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2
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Ács A, Kovács AW, Győri J, Farkas A. Optimization of assay conditions to quantify ECOD activity in vivo in individual Daphnia magna. Assay performance evaluation with model CYP 450 inducers/inhibitors. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 273:116159. [PMID: 38417318 DOI: 10.1016/j.ecoenv.2024.116159] [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: 10/13/2023] [Revised: 02/12/2024] [Accepted: 02/25/2024] [Indexed: 03/01/2024]
Abstract
Screening the activity of the cytochrome P450 (CYP450) mixed function oxidase system in aquatic invertebrates received seldom applications in ecotoxicology due to low baseline enzymatic activities characteristic for these organisms. In this study, an existing in vivo spectrofluorometric assay method based on quantifying the cytochrome P450 mediated conversion of 7-ethocycoumarin (EtC) used as substrate to the product 7-hydroxycoumarin (HCm) called: ethoxycoumarin-O-deethylase (ECOD) activity, initially applicable on pooled samples of Daphnia magna, was optimized for use on individual organisms. Optimal assay conditions have been established for as small as 3- and 6 days old individuals, and the limits of spectrofluorometric detection of HCm excreted by daphnids in the incubation media were defined. The modified assay was tested by screening the modulation of ECOD activity in daphnids following 24 h exposure to β-naphthoflavone (β-NF, reference CYP450 inducer) and to prochloraz (PCZ), a potent CYP450 inhibitor. Maximal ECOD activity levels in daphnids were recorded following 2 hours of incubation to 200 nM EtC. The limit of spectrofluorometric detection of HCm in the incubation media was 6.25 nM, achieved by more than 80% of three days old daphnids and all six days old individuals. Exposure of daphnids to β-NF demonstrated a bell-shaped ECOD activity induction potential, while PCZ elicited partial (60%) inhibition of ECOD activity. This optimized in vivo ECOD activity assay may serve as a cost-effective tool to study the responsiveness of Phase-I metabolism in D. magna to toxic pressure and its applicability to other aquatic invertebrates is also worth for consideration.
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Affiliation(s)
- András Ács
- Balaton Limnological Research Institute, Hungarian Research Network, Klebelsberg Kuno u. 3., Tihany H-8237, Hungary.
| | - Attila W Kovács
- Balaton Limnological Research Institute, Hungarian Research Network, Klebelsberg Kuno u. 3., Tihany H-8237, Hungary
| | - János Győri
- Balaton Limnological Research Institute, Hungarian Research Network, Klebelsberg Kuno u. 3., Tihany H-8237, Hungary
| | - Anna Farkas
- Balaton Limnological Research Institute, Hungarian Research Network, Klebelsberg Kuno u. 3., Tihany H-8237, Hungary
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3
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Hedge JM, Hunter DL, Sanders E, Jarema KA, Olin JK, Britton KN, Lowery M, Knapp BR, Padilla S, Hill BN. Influence of Methylene Blue or Dimethyl Sulfoxide on Larval Zebrafish Development and Behavior. Zebrafish 2023; 20:132-145. [PMID: 37406269 PMCID: PMC10627343 DOI: 10.1089/zeb.2023.0017] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/07/2023] Open
Abstract
The use of larval zebrafish developmental testing and assessment, specifically larval zebrafish locomotor activity, has been recognized as a higher throughput testing strategy to identify developmentally toxic and neurotoxic chemicals. There are, however, no standardized protocols for this type of assay, which could result in confounding variables being overlooked. Two chemicals commonly employed during early-life stage zebrafish assays, methylene blue (antifungal agent) and dimethyl sulfoxide (DMSO, a commonly used vehicle) have been reported to affect the morphology and behavior of freshwater fish. In this study, we conducted developmental toxicity (morphology) and neurotoxicity (behavior) assessments of commonly employed concentrations for both chemicals (0.6-10.0 μM methylene blue; 0.3%-1.0% v/v DMSO). A light-dark transition behavioral testing paradigm was applied to morphologically normal, 6 days postfertilization (dpf) zebrafish larvae kept at 26°C. Additionally, an acute DMSO challenge was administered based on early-life stage zebrafish assays typically used in this research area. Results from developmental toxicity screens were similar between both chemicals with no morphological abnormalities detected at any of the concentrations tested. However, neurodevelopmental results were mixed between the two chemicals of interest. Methylene blue resulted in no behavioral changes up to the highest concentration tested, 10.0 μM. By contrast, DMSO altered larval behavior following developmental exposure at concentrations as low as 0.5% (v/v) and exhibited differential concentration-response patterns in the light and dark photoperiods. These results indicate that developmental DMSO exposure can affect larval zebrafish locomotor activity at routinely used concentrations in developmental neurotoxicity assessments, whereas methylene blue does not appear to be developmentally or neurodevelopmentally toxic to larval zebrafish at routinely used concentrations. These results also highlight the importance of understanding the influence of experimental conditions on larval zebrafish locomotor activity that may ultimately confound the interpretation of results.
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Affiliation(s)
- Joan M. Hedge
- Office of Research and Development, Center for Computational Toxicology and Exposure, Biomolecular and Computational Toxicology Division, Advanced Experimental Toxicology Models Branch, U.S. Environmental Protection Agency, Research Triangle Park, North Carolina 27711, USA
| | - Deborah L. Hunter
- Office of Research and Development, Center for Computational Toxicology and Exposure, Biomolecular and Computational Toxicology Division, Rapid Assay Development Branch, U.S. Environmental Protection Agency, Research Triangle Park, North Carolina 27711, USA
| | - Erik Sanders
- Aquatics Lab Services LLC 1112 Nashville Street St. Peters, MO 63376, USA
| | - Kimberly A. Jarema
- Office of Research and Development, Center for Public Health and Environmental Assessment, Immediate Office, Program Operations Staff, U.S. Environmental Protection Agency, Research Triangle Park, North Carolina 27711, USA
| | - Jeanene K. Olin
- Office of Research and Development, Center for Computational Toxicology and Exposure, Biomolecular and Computational Toxicology Division, Rapid Assay Development Branch, U.S. Environmental Protection Agency, Research Triangle Park, North Carolina 27711, USA
| | - Katy N. Britton
- ORAU Research Participation Program hosted by EPA, Office of Research and Development, Center for Computational Toxicology and Exposure, Biomolecular and Computational Toxicology Division, Rapid Assay Development Branch, U.S. Environmental Protection Agency, Research Triangle Park, North Carolina 27711, USA
| | - Morgan Lowery
- Office of Research and Development, Center for Computational Toxicology and Exposure, Biomolecular and Computational Toxicology Division, Rapid Assay Development Branch, U.S. Environmental Protection Agency, Research Triangle Park, North Carolina 27711, USA
| | - Bridget R. Knapp
- ORISE Research Participation Program hosted by EPA, Office of Research and Development, Center for Computational Toxicology and Exposure, Biomolecular and Computational Toxicology Division, Rapid Assay Development Branch, U.S. Environmental Protection Agency, Research Triangle Park, North Carolina 27711, USA
| | - Stephanie Padilla
- Office of Research and Development, Center for Computational Toxicology and Exposure, Biomolecular and Computational Toxicology Division, Rapid Assay Development Branch, U.S. Environmental Protection Agency, Research Triangle Park, North Carolina 27711, USA
| | - Bridgett N. Hill
- ORISE Research Participation Program hosted by EPA, Office of Research and Development, Center for Computational Toxicology and Exposure, Biomolecular and Computational Toxicology Division, Rapid Assay Development Branch, U.S. Environmental Protection Agency, Research Triangle Park, North Carolina 27711, USA
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4
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Li Y, Kim S, Lee S, Kim S. Metabolic effects of diclofenac on the aquatic food chain - 1 H-NMR study of water flea-zebrafish system. Toxicol Res 2023; 39:307-315. [PMID: 37008688 PMCID: PMC10050267 DOI: 10.1007/s43188-022-00167-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 12/16/2022] [Accepted: 12/23/2022] [Indexed: 02/19/2023] Open
Abstract
In the environment, aquatic organisms are not only directly exposed to pollutants, but the effects can be exacerbated along the food chain. In this study, we investigated the effect of the food (water flea) on the secondary consumer (zebrafish) with the exposure diclofenac (DCF) Both organisms were exposed to an environmentally relevant concentrations (15 µg/L) of diclofenac for five days, and zebrafish were fed exposed and non-exposed water fleas, respectively. Metabolites of the water fleas were directly analyzed using HRMAS NMR, and for zebrafish, polar metabolite were extracted and analyzed using liquid NMR. Metabolic profiling was performed and statistically significant metabolites which affected by DCF exposure were identified. There were more than 20 metabolites with variable importance (VIP) score greater than 1.0 in comparisons in fish groups, and identified metabolites differed depending on the effect of exposure and the effect of food. Specifically, exposure to DCF significantly increased alanine and decreased NAD + in zebrafish, which means energy demand was increased. Additionally, the effects of exposed food decreased in guanosine, a neuroprotective metabolite, which explained that the neurometabolic pathway was perturbated by the feeding of exposed food. Our results which short-term exposed primary consumers to pollutants indirectly affected the metabolism of secondary consumers suggest that the long-term exposure further study remains to be investigated.
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Affiliation(s)
- Youzhen Li
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busandaehak-ro 63, Geumjeong-gu, 46241 Busan, Republic of Korea
| | - Seonghye Kim
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busandaehak-ro 63, Geumjeong-gu, 46241 Busan, Republic of Korea
| | - Sujin Lee
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busandaehak-ro 63, Geumjeong-gu, 46241 Busan, Republic of Korea
| | - Suhkmann Kim
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busandaehak-ro 63, Geumjeong-gu, 46241 Busan, Republic of Korea
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5
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Qin S, Xia T, Li G, Gu L, Sun Y, Yang Z. Impact of atrazine on the dynamic response of Daphnia pulex populations to fish predation risk. Front Ecol Evol 2023. [DOI: 10.3389/fevo.2022.1068077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Herbicide pollution is persistent, which not only has a negative impact on individual organisms, but also may alter population dynamics and stability of interspecific relationships. Cladocerans, an important part of zooplankton, are often simultaneously exposed to environmental pollutants and predation risk in the aquatic environment. To evaluate the combined effects of atrazine and fish predation risk on the population traits of cladocerans, we exposed Daphnia pulex to different concentrations of atrazine (0, 0.05, 0.10, and 1.0 mg L−1) with or without fish (Rhodeus ocellatus) kairomone, recorded the key population traits, and fitted Gaussian model to population dynamics. Results showed that fish kairomone increased the population density at the end of the experiment and resting eggs production, and tended to decrease the total biomass and the average dry weight per individual of D. pulex. Atrazine reduced the total biomass, the average dry weight per individual, and resting eggs production of D. pulex populations. Atrazine also decreased the population density at the end of the experiment of D. pulex in fish kairomone treatment, and attenuated the promoting effect of fish kairomone on resting eggs production and the reduction of the total biomass. The findings highlighted the importance of considering the combined impact of environmental pollutants and predation risks on zooplankton populations.
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6
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de-Carvalho RR, Gomes-Carneiro MR, Geraldino BR, Lopes GDS, Paumgartten FJR. Evaluation of the developmental toxicity of solvents, metals, drugs, and industrial chemicals using a freshwater snail ( Biomphalaria glabrata) assay. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2022; 85:798-814. [PMID: 35723169 DOI: 10.1080/15287394.2022.2089413] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
A freshwater snail assay was employed to assess the embryotoxicity of solvents including acetone, methanol, ethanol, isopropanol, dimethyl-sulfoxide, glycerin, metals/metalloids including mercuric chloride (HgCl2), cadmium chloride (CdCl2,), antimony salts Sb+3 and Sb+5, drugs including colchicine, hydroxyurea, cyclophosphamide, an industrial chemical sodium azide (SA), an anionic surfactant dodecyl sodium sulfate-(DSS), H2O2 and sodium chloride (NaCl). The assay consists of exposing Biomphalaria glabrata egg masses (EM) to the substances for 96-hr and following up embryo/snail development for lethality, abnormal morphology (teratogenicity), and day of hatching up to day 10 or 14 after spawning. Based upon concentration-response relationships, LC50%s (embryolethality), EC50%s (teratogenicity) and IC50%s (hatching retardation) and 95%CIs were determined for tested chemicals. The LOECs indicated that HgCl2 (37 nM) and CdCl2 (140 nM) are potent embryotoxic agents in snails. Teratogenic indices (TI = LC50/EC50) for almost all tested chemicals were lower than or close to unity suggesting that these compounds were not teratogenic in this assay. The snail assay may be adequately performed in a cost-effective standardized protocol which enables testing a number of environmental chemicals over a broad concentration range. The snail assay needs to undergo further validation to be recognized for an internationally harmonized hazard identification in ecotoxicity risk assessment.
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Affiliation(s)
- Rosângela Ribeiro de-Carvalho
- Department of Biological Sciences, National School of Public Health, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
| | - Maria Regina Gomes-Carneiro
- Department of Biological Sciences, National School of Public Health, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
| | - Barbara Rodrigues Geraldino
- Department of Biological Sciences, National School of Public Health, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
| | - Gabrielle da Silveira Lopes
- Department of Biological Sciences, National School of Public Health, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
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7
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Mena F, González-Ortegón E, Solano K, Araújo CVM. The effect of the insecticide diazinon on the osmoregulation and the avoidance response of the white leg shrimp (Penaeus vannamei) is salinity dependent. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 206:111364. [PMID: 32980654 DOI: 10.1016/j.ecoenv.2020.111364] [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] [Received: 05/06/2020] [Revised: 09/09/2020] [Accepted: 09/14/2020] [Indexed: 06/11/2023]
Abstract
Diazinon is one of the insecticides that represent a high risk for Costa Rican estuarine environments due to its widespread use in pineapple plantations. In estuaries, organisms are frequently submitted to stress caused by natural factors (e.g., continuous changes in salinity levels) and, additionally, to stress due to contamination. Therefore, the driving question of this study was: will organisms be more susceptible to suffer the deleterious effects caused by diazinon because of the stress resulting from the salinity changes? The estuarine shrimp Penaeus vannamei was used as the model organism and two responses were measured: osmoregulation (the physiological effect after a forced and continuous 24 h-exposure) and avoidance [the behavioural effect after a short (3 h) non-forced, multi-compartmented exposure]. Juveniles were exposed to diazinon (0.1, 1, 10 and 100 μg/L) at three different salinities (10, 20 and 30). Disruption in the capacity to regulate the haemolymph osmotic pressure was observed at a salinity of 30 in individuals exposed to diazinon and methanol (used as vehicle). At that salinity, the ability of shrimps to detect and avoid the highest diazinon concentrations was impaired. P. vannamei juveniles inhabit environments with a high variation in salinity, but with an optimum osmotic point close to a salinity of 20; therefore, the higher the salinity, the greater the vulnerability of shrimps to the effects of diazinon. From an ecological point of view, this combined effect of salinity and contamination might also limit the spatial distribution of the organisms.
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Affiliation(s)
- Freylan Mena
- Instituto Regional de Estudios en Sustancias Tóxicas (IRET), Universidad Nacional, 86-3000, Heredia, Costa Rica.
| | - Enrique González-Ortegón
- Department of Ecology and Coastal Management, Institute of Marine Sciences of Andalucía (CSIC), 11510, Puerto Real, Cádiz, Spain
| | - Karla Solano
- Instituto Regional de Estudios en Sustancias Tóxicas (IRET), Universidad Nacional, 86-3000, Heredia, Costa Rica
| | - Cristiano V M Araújo
- Department of Ecology and Coastal Management, Institute of Marine Sciences of Andalucía (CSIC), 11510, Puerto Real, Cádiz, Spain
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Christou M, Kavaliauskis A, Ropstad E, Fraser TWK. DMSO effects larval zebrafish (Danio rerio) behavior, with additive and interaction effects when combined with positive controls. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 709:134490. [PMID: 31905542 DOI: 10.1016/j.scitotenv.2019.134490] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 09/07/2019] [Accepted: 09/15/2019] [Indexed: 06/10/2023]
Abstract
Embryonic and larval zebrafish (Danio rerio) behavior is commonly used to identify neurotoxic compounds. Here, we investigated whether sub-lethal exposures to the common solvents dimethyl sulfoxide (DMSO, 0.01-1%) and methanol (MeOH, 0.01-1%), or the anti-fungal agent methylene blue (MB, 0.0001-0.0005%), can influence larval behavior in a simple light/dark paradigm conducted in 96-well plates. In addition, we tested whether the media volume within the behavioral arena or the zebrafish strain, AB wild type, AB Tübingen (AB/TU), or Tüpfel long-fin (TL), could also influence larval behavior. Following the single exposures, we co-exposed larvae to DMSO and either MB or two other compounds with known behavioral effects in larval zebrafish, flutamide and perfluorooctanesulfonic acid (PFOS). We found ≥0.55% DMSO and 0.0005% MB significantly affected larval behavior, but there was no effect of MeOH. Similarly, TL showed less movement compared to AB and AB/TU strains, whereas lower media volumes also significantly reduced larval movement. However, all strains responded similarly to DMSO and MB. In the co-exposure studies, we found either additive or interaction effects between DMSO and either MB, flutamide, or PFOS, depending on the behavioral endpoint measured. In addition, media volume had no effect on the DMSO concentration response curve, but again we observed additive effects on behavior. In conclusion, methodology can lead to alterations in baseline locomotor activity and compounds can have additive or interaction effects on behavioral endpoints. However, we found no evidence that strain effects should be a concern when deciding on solvents for a simple light/dark behavioral test in larval zebrafish.
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Affiliation(s)
- Maria Christou
- Norwegian University of Life Sciences, Department of Production Animal Clinical Sciences, Oslo, Norway
| | - Arturas Kavaliauskis
- Norwegian University of Life Sciences, Department of Production Animal Clinical Sciences, Oslo, Norway
| | - Erik Ropstad
- Norwegian University of Life Sciences, Department of Production Animal Clinical Sciences, Oslo, Norway
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9
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Young SD, Gavel MJ, Gutierrez-Villagomez JM, Forbes MR, Robinson SA. Assessment of sublethal ecotoxicity of solvents on larvae of a model native amphibian (Lithobates pipiens). J Appl Toxicol 2019; 40:483-492. [PMID: 31736102 DOI: 10.1002/jat.3920] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Revised: 09/18/2019] [Accepted: 09/19/2019] [Indexed: 12/12/2022]
Abstract
Carrier solvents are used frequently in toxicity testing to assist hydrophobic chemicals into solution, but such solvents may have toxic effects on test subjects. Amphibians are model organisms in toxicity studies; however, little is known about the direct effects of solvents on native amphibians. Following modifications to standardized guidelines for native species, we used acute 96-hour exposures to assess the direct effects of three common solvents on survival, differences in morphology and occurrence of abnormalities of northern leopard frog larvae (Lithobates pipiens). The solvents, dimethyl sulfoxide (DMSO), ethanol (ETOH) and acetone (ACE) were used at nominal concentrations ranging from 1 to 100 μL/L. We also conducted a 30-day exposure to assess the direct chronic effects of DMSO at 1 and 5 μL/L, on larval growth, development and sex differentiation, but found no effects. Acute exposure to solvents also had no effect on the survival of larvae, but we found significant abnormalities in tadpoles acutely exposed to 100 μL/L ACE. Acute exposure to DMSO and ETOH had further concentration-dependent effects on larval morphological traits. Our study suggests that DMSO and ETOH at ≤20 μL/L may be used as solvents in amphibian ecotoxicological studies, but ACE should be limited to ≤50 μL/L in ecotoxicity studies and perhaps much less (≤10 μL/L) in studies with other amphibians, based on a review of existing literature. We emphasize pilot studies when using solvents on acute and chronic ecotoxicity tests, using native amphibians.
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Affiliation(s)
- Sarah D Young
- Environment and Climate Change Canada, National Wildlife Research Centre, Ecotoxicology and Wildlife Health Division, Ottawa, Ontario, Canada
| | - Melody J Gavel
- Department of Biology, Carleton University, Ottawa, Ontario, Canada
| | | | - Mark R Forbes
- Department of Biology, Carleton University, Ottawa, Ontario, Canada
| | - Stacey A Robinson
- Environment and Climate Change Canada, National Wildlife Research Centre, Ecotoxicology and Wildlife Health Division, Ottawa, Ontario, Canada
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10
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Shatilina Z, Drozdova P, Bedulina D, Rivarola-Duarte L, Schreiber S, Otto C, Jühling F, Aulhorn S, Busch W, Lubyaga Y, Kondrateva E, Pobezhimova T, Jakob L, Lucassen M, Sartoris FJ, Hackermüller J, Pörtner HO, Stadler PF, Luckenbach T, Timofeyev M. Transcriptome-level effects of the model organic pollutant phenanthrene and its solvent acetone in three amphipod species. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY D-GENOMICS & PROTEOMICS 2019; 33:100630. [PMID: 31710888 DOI: 10.1016/j.cbd.2019.100630] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Revised: 09/19/2019] [Accepted: 09/29/2019] [Indexed: 12/11/2022]
Abstract
Polyaromatic hydrocarbons (PAH) are common pollutants of water ecosystems originating from incineration processes and contamination with mineral oil. Water solubility of PAHs is generally low; for toxicity tests with aquatic organisms, they are therefore usually dissolved in organic solvents. Here we examined the effects of a typical model PAH, phenanthrene, and a solvent, acetone, on amphipods as relevant aquatic invertebrate models. Two of these species, Eulimnogammarus verrucosus and Eulimnogammarus cyaneus, are common endemics of the oligotrophic and pristine Lake Baikal, while one, Gammarus lacustris, is widespread throughout the Holarctic and inhabits smaller and more eutrophic water bodies in the Baikal area. Neither solvent nor phenanthrene caused mortality at the applied concentrations, but both substances affected gene expression in all species. Differential gene expression was more profound in the species from Lake Baikal than in the Holarctic species. Moreover, in one of the Baikal species, E. cyaneus, we found that many known components of the cellular xenobiotic detoxification system reacted to the treatments. Finally, we detected a negative relationship between changes in transcript abundances in response to the solvent and phenanthrene. This mixture effect, weaker than the impact by a single mixture component, needs further exploration.
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Affiliation(s)
- Zhanna Shatilina
- Institute of Biology, Irkutsk State University, Lenin str. 3, RUS-664003 Irkutsk, Russia; Baikal Research Centre, Lenin str. 21, RUS-664003 Irkutsk, Russia
| | - Polina Drozdova
- Institute of Biology, Irkutsk State University, Lenin str. 3, RUS-664003 Irkutsk, Russia; Bioinformatics Group, Department of Computer Science, Universität Leipzig, Härtelstraße 16-18, D-04107 Leipzig, Germany; Interdisciplinary Center for Bioinformatics, Universität Leipzig, Härtelstraße 16-18, D-04107 Leipzig, Germany
| | - Daria Bedulina
- Institute of Biology, Irkutsk State University, Lenin str. 3, RUS-664003 Irkutsk, Russia; Baikal Research Centre, Lenin str. 21, RUS-664003 Irkutsk, Russia
| | - Lorena Rivarola-Duarte
- Bioinformatics Group, Department of Computer Science, Universität Leipzig, Härtelstraße 16-18, D-04107 Leipzig, Germany; Interdisciplinary Center for Bioinformatics, Universität Leipzig, Härtelstraße 16-18, D-04107 Leipzig, Germany
| | - Stephan Schreiber
- Young Investigator Group Bioinformatics & Transcriptomics, UFZ - Helmholtz Centre for Environmental Research, Permoserstraße 15, D-04318 Leipzig, Germany
| | - Christian Otto
- ecSeq Bioinformatics GmbH, Sternwartenstraße 29, D-04103 Leipzig, Germany
| | - Frank Jühling
- Inserm U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, 3 Rue Koeberlé, F-67000 Strasbourg, France; Université de Strasbourg, 4 Rue Blaise Pascal, F-67000 Strasbourg, France
| | - Silke Aulhorn
- Department of Bioanalytical Ecotoxicology, UFZ - Helmholtz Centre for Environmental Research, Permoserstraße 15, D-04318 Leipzig, Germany
| | - Wibke Busch
- Department of Bioanalytical Ecotoxicology, UFZ - Helmholtz Centre for Environmental Research, Permoserstraße 15, D-04318 Leipzig, Germany
| | - Yulia Lubyaga
- Institute of Biology, Irkutsk State University, Lenin str. 3, RUS-664003 Irkutsk, Russia; Baikal Research Centre, Lenin str. 21, RUS-664003 Irkutsk, Russia
| | - Elizaveta Kondrateva
- Institute of Biology, Irkutsk State University, Lenin str. 3, RUS-664003 Irkutsk, Russia; Siberian Institute of Plant Physiology and Biochemistry, Siberian Branch, RAS, Lermontov str. 132, 664033 Irkutsk, Russia
| | - Tamara Pobezhimova
- Siberian Institute of Plant Physiology and Biochemistry, Siberian Branch, RAS, Lermontov str. 132, 664033 Irkutsk, Russia
| | - Lena Jakob
- Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Am Handelshafen 12, D-27570 Bremerhaven, Germany
| | - Magnus Lucassen
- Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Am Handelshafen 12, D-27570 Bremerhaven, Germany
| | - Franz J Sartoris
- Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Am Handelshafen 12, D-27570 Bremerhaven, Germany
| | - Jörg Hackermüller
- Young Investigator Group Bioinformatics & Transcriptomics, UFZ - Helmholtz Centre for Environmental Research, Permoserstraße 15, D-04318 Leipzig, Germany
| | - Hans-Otto Pörtner
- Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Am Handelshafen 12, D-27570 Bremerhaven, Germany
| | - Peter F Stadler
- Bioinformatics Group, Department of Computer Science, Universität Leipzig, Härtelstraße 16-18, D-04107 Leipzig, Germany; Competence Center for Scalable Data Services and Solutions Dresden/Leipzig, Interdisciplinary Center for Bioinformatics, German Centre for Integrative Biodiversity Research (iDiv), Leipzig Research Center for Civilization Diseases, Universität Leipzig, Augustusplatz 12, D-04107 Leipzig, Germany; Max Planck Institute for Mathematics in the Sciences, Inselstraße 22, D-04103 Leipzig, Germany; Department of Theoretical Chemistry, University of Vienna, Währinger Straße 17, A-1090 Vienna, Austria; Facultad de Ciencias, Universidad National de Colombia, Sede Bogotá, Ciudad Universitaria, COL-111321 Bogotá, D.C., Colombia; Santa Fe Institute, 1399 Hyde Park Rd., NM87501 Santa Fe, USA; Interdisciplinary Center for Bioinformatics, Universität Leipzig, Härtelstraße 16-18, D-04107 Leipzig, Germany
| | - Till Luckenbach
- Department of Bioanalytical Ecotoxicology, UFZ - Helmholtz Centre for Environmental Research, Permoserstraße 15, D-04318 Leipzig, Germany
| | - Maxim Timofeyev
- Institute of Biology, Irkutsk State University, Lenin str. 3, RUS-664003 Irkutsk, Russia; Baikal Research Centre, Lenin str. 21, RUS-664003 Irkutsk, Russia.
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11
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Félix L, Coimbra AM, Valentim AM, Antunes L. Review on the use of zebrafish embryos to study the effects of anesthetics during early development. Crit Rev Toxicol 2019; 49:357-370. [PMID: 31314655 DOI: 10.1080/10408444.2019.1617236] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Over the years, the potential toxicity of anesthetics has raised serious concerns about its safe use during pregnancy. As evidence emerged from research in animal models, showing that some anesthetic drugs are potential teratogenic, the determination of the risk of exposures to anesthetic drugs at early life stages became mandatory. However, due to inaccessibility and ethical constrains related to experimental conditions, the use of early life stages in mammalian models is limited. In this regard, some animal and nonanimal models have been suggested to surpass mammalian use in experimentation. Among them, the zebrafish embryo test has been recognized as a promising alternative in toxicology research, as well as an inexpensive and practical test. Substantial information collected from developmental research following compounds exposure, has contributed to the application of zebrafish assays in research, although only a few studies have focused on the use of early life stages of zebrafish to evaluate the developmental effects of anesthetics. Based on the recent advances of science and technology, there is a clear potential for zebrafish early life stages to provide new insights into anesthetics teratogenicity. This review provides an overview of recent anesthesia research using zebrafish embryos, demonstrating its usefulness to the anesthesia field, discussing the recent findings on various aspects related to the effects of anesthetics during early life development and the strengths and limitations of this model system.
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Affiliation(s)
- Luís Félix
- Institute for Research and Innovation in Health, Laboratory Animal Science, Institute of Molecular and Cell Biology, University of Porto , Porto , Portugal.,Centre for the Research and Technology of Agro-Environmental and Biological Sciences, University of Trás-os-Montes and Alto Douro , Vila Real , Portugal
| | - Ana Maria Coimbra
- Centre for the Research and Technology of Agro-Environmental and Biological Sciences, University of Trás-os-Montes and Alto Douro , Vila Real , Portugal
| | - Ana Maria Valentim
- Institute for Research and Innovation in Health, Laboratory Animal Science, Institute of Molecular and Cell Biology, University of Porto , Porto , Portugal.,Centre for the Research and Technology of Agro-Environmental and Biological Sciences, University of Trás-os-Montes and Alto Douro , Vila Real , Portugal
| | - Luís Antunes
- Institute for Research and Innovation in Health, Laboratory Animal Science, Institute of Molecular and Cell Biology, University of Porto , Porto , Portugal.,Centre for the Research and Technology of Agro-Environmental and Biological Sciences, University of Trás-os-Montes and Alto Douro , Vila Real , Portugal
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12
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Pedersen KE, Fredensborg BL, Jensen AB, Cedergreen N. Quantification of the activity of detoxifying enzymes in terrestrial invertebrates: Optimization, evaluation and use of in vitro and
ex vivo
methods. Methods Ecol Evol 2019. [DOI: 10.1111/2041-210x.13160] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kathrine E. Pedersen
- Department of Plant and Environmental SciencesUniversity of Copenhagen Frederiksberg Denmark
| | - Brian L. Fredensborg
- Department of Plant and Environmental SciencesUniversity of Copenhagen Frederiksberg Denmark
| | - Annette B. Jensen
- Department of Plant and Environmental SciencesUniversity of Copenhagen Frederiksberg Denmark
| | - Nina Cedergreen
- Department of Plant and Environmental SciencesUniversity of Copenhagen Frederiksberg Denmark
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13
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Hu J, Le Q, Wang Y, Yu N, Cao X, Kuang S, Zhang M, Gu W, Sun Y, Yang Y, Xu S, Yan X. Effects of formaldehyde on detoxification and immune responses in silver pomfret (Pampus argenteus). FISH & SHELLFISH IMMUNOLOGY 2019; 88:449-457. [PMID: 30877061 DOI: 10.1016/j.fsi.2019.03.019] [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: 01/08/2019] [Revised: 03/06/2019] [Accepted: 03/08/2019] [Indexed: 06/09/2023]
Abstract
Formaldehyde can effectively control ectoparasites in silver pomfret (Pampus argenteus). However, there is limited information on the effects of formaldehyde treatment at a molecular level in fishes. In the present study, transcriptome profiling was conducted to investigate the effects of formaldehyde treatment (80 mg/L, bath for 1 h every day for three consecutive days) on the liver and kidney tissues of silver pomfret. A total of 617959982 clean reads were obtained and assembled into 265760 unigenes with an N50 length of 1507 bp, and the assembled unigenes were all annotated by alignment with public databases. A total of 2204 differentially expressed genes (DEGs) were detected in the liver and kidney tissues, and they included 7 detoxification- related genes and 9 immune-related genes, such as CYP450, GST, MHC I & II, and CCR. In addition, 1440 DEGs were mapped to terms in the GO database, and 1064 DEGs were mapped to the KEGG database. The expression of 4 detoxification-related genes and 6 immune-related genes in three days formaldehyde treatment were analyzed using RT-qPCR, and the antioxidant enzyme levels were also determined. The results indicate differential expression of detoxification- and immune-related genes during the three days formaldehyde treatment. Our data could provide a reference for the treatment of parasites to avoid high mortality and help in understanding the molecular activity in fishes after formaldehyde exposure.
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Affiliation(s)
- Jiabao Hu
- Key Laboratory of Applied Marine Biotechnology, Ningbo University, Ministry of Education, Ningbo, China; Key Laboratory of Marine Biotechnology of Zhejiang Province, Ningbo University, Ningbo, China; College of Marine Sciences, Ningbo University, Ningbo, China
| | - Qijun Le
- Key Laboratory of Applied Marine Biotechnology, Ningbo University, Ministry of Education, Ningbo, China; Key Laboratory of Marine Biotechnology of Zhejiang Province, Ningbo University, Ningbo, China; College of Marine Sciences, Ningbo University, Ningbo, China; Ningbo Entry-Exit Inspection and Quarantine Bureau Technical Center, Ningbo, China
| | - Yajun Wang
- Key Laboratory of Applied Marine Biotechnology, Ningbo University, Ministry of Education, Ningbo, China; Key Laboratory of Marine Biotechnology of Zhejiang Province, Ningbo University, Ningbo, China; College of Marine Sciences, Ningbo University, Ningbo, China.
| | - Na Yu
- Key Laboratory of Applied Marine Biotechnology, Ningbo University, Ministry of Education, Ningbo, China; Key Laboratory of Marine Biotechnology of Zhejiang Province, Ningbo University, Ningbo, China; College of Marine Sciences, Ningbo University, Ningbo, China
| | - Xiaohuan Cao
- Key Laboratory of Applied Marine Biotechnology, Ningbo University, Ministry of Education, Ningbo, China; Key Laboratory of Marine Biotechnology of Zhejiang Province, Ningbo University, Ningbo, China; College of Marine Sciences, Ningbo University, Ningbo, China
| | - Siwen Kuang
- Key Laboratory of Applied Marine Biotechnology, Ningbo University, Ministry of Education, Ningbo, China; Key Laboratory of Marine Biotechnology of Zhejiang Province, Ningbo University, Ningbo, China; College of Marine Sciences, Ningbo University, Ningbo, China
| | - Man Zhang
- Key Laboratory of Applied Marine Biotechnology, Ningbo University, Ministry of Education, Ningbo, China; Key Laboratory of Marine Biotechnology of Zhejiang Province, Ningbo University, Ningbo, China; College of Marine Sciences, Ningbo University, Ningbo, China
| | - Weiwei Gu
- Key Laboratory of Applied Marine Biotechnology, Ningbo University, Ministry of Education, Ningbo, China; Key Laboratory of Marine Biotechnology of Zhejiang Province, Ningbo University, Ningbo, China; College of Marine Sciences, Ningbo University, Ningbo, China
| | - Yibo Sun
- Key Laboratory of Applied Marine Biotechnology, Ningbo University, Ministry of Education, Ningbo, China; Key Laboratory of Marine Biotechnology of Zhejiang Province, Ningbo University, Ningbo, China; College of Marine Sciences, Ningbo University, Ningbo, China
| | - Yang Yang
- Key Laboratory of Applied Marine Biotechnology, Ningbo University, Ministry of Education, Ningbo, China; Key Laboratory of Marine Biotechnology of Zhejiang Province, Ningbo University, Ningbo, China; College of Marine Sciences, Ningbo University, Ningbo, China
| | - Shanliang Xu
- Key Laboratory of Applied Marine Biotechnology, Ningbo University, Ministry of Education, Ningbo, China; Key Laboratory of Marine Biotechnology of Zhejiang Province, Ningbo University, Ningbo, China; College of Marine Sciences, Ningbo University, Ningbo, China
| | - Xiaojun Yan
- Key Laboratory of Applied Marine Biotechnology, Ningbo University, Ministry of Education, Ningbo, China; Key Laboratory of Marine Biotechnology of Zhejiang Province, Ningbo University, Ningbo, China; College of Marine Sciences, Ningbo University, Ningbo, China.
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14
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Cytoskeletal synchronization of CHO cells with polymer functionalized fullerene C 60. Biointerphases 2019; 14:021002. [PMID: 30884950 DOI: 10.1116/1.5084002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Recent developments in the field of fullerene C60 and its derivatives suggest its suitability in a wide range of applications ranging from photovoltaic instruments, development of solar based cells, cosmetics to enzyme inhibition treatment, and so on. These innovative applications raised possibilities of intentional or oblivious human-particle contact leading to possible deleterious effects on human health. The current study deals with the interaction of dextran functionalized fullerene C60 (Dex-C60) on Chinese Hamster Ovary cells. The results showed that the cell viability was not affected by Dex-C60 treatment even at higher concentrations. Treatment of Dex-C60 did not affect mitochondrial membrane potential and the integrity of lysosomal and cytoskeletal membrane. DNA ladder assay and nuclear staining showed that the DNA remains intact, and no fragmentation or nuclear condensation was visible. From flow cytometry analysis, the viable population of treated cells was seemed to be remaining similar to that of untreated cells. Hence, from the current result, it is concluded that Dex-C60 can be a potential candidate for various biomedical applications.
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15
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Ma J, Yin H, Li M, Deng Y, Ahmad O, Qin G, He Q, Li J, Gao K, Zhu J, Wang B, Wu S, Wang T, Shang J. A Comprehensive Study of High Cholesterol Diet-Induced Larval Zebrafish Model: A Short-Time In Vivo Screening Method for Non-Alcoholic Fatty Liver Disease Drugs. Int J Biol Sci 2019; 15:973-983. [PMID: 31182918 PMCID: PMC6535789 DOI: 10.7150/ijbs.30013] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Accepted: 02/20/2019] [Indexed: 12/24/2022] Open
Abstract
Non-alcoholic fatty liver disease (NAFLD) is the most common chronic liver disease around the world. However, there is still no drug for NAFLD in the market, the study of potential therapeutic drugs on NAFLD is extraordinarily pressing and urgent. The rodent models for NAFLD drugs' study are always with a long time cost. Therefore, we aim to establish a short-time NAFLD drug screening model. A laboratory-made high cholesterol diet was used on larval zebrafish for 3 weeks to establish the NAFLD screen model. Lipid metabolism, oxidant stress, and pathology were studied to comprehensively demonstrate the whole spectrum of NAFLD on this model. Bezafibrate and pioglitazone were used to evaluate the model. Moreover, mechanism research was performed on this model.The NAFLD larval zebrafish model was established with the comprehensive process of NAFLD. Moreover, multiple index on lipid metabolism, oxidant stress, hepatic steatosis, and hepatic inflammation can be easily tested for drug screening. Furthermore, this model can be used to perform the mechanism research by testing mRNA expression. The NAFLD larval zebrafish model is a comprehensive short-time screening method for NAFLD drugs.
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Affiliation(s)
- Ji Ma
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, China
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, China
- Jiangsu Key Laboratory of TCM Evaluation and Translational Research, China Pharmaceutical University, Nanjing 211198, China
| | - Hongli Yin
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, China
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, China
- Jiangsu Key Laboratory of TCM Evaluation and Translational Research, China Pharmaceutical University, Nanjing 211198, China
| | - Maoru Li
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, China
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, China
- Jiangsu Key Laboratory of TCM Evaluation and Translational Research, China Pharmaceutical University, Nanjing 211198, China
| | - Yang Deng
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, China
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, China
- Jiangsu Key Laboratory of TCM Evaluation and Translational Research, China Pharmaceutical University, Nanjing 211198, China
| | - Owais Ahmad
- School of life sciences, China Pharmaceutical University, Nanjing 211198, China
| | - Guohong Qin
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, China
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, China
- Jiangsu Key Laboratory of TCM Evaluation and Translational Research, China Pharmaceutical University, Nanjing 211198, China
| | - Qiangqiang He
- Qinghai Key Laboratory of Tibetan Medicine Pharmacology and Safety Evaluation, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810008, Qinghai Province, China
| | - Jiajing Li
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, China
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, China
- Jiangsu Key Laboratory of TCM Evaluation and Translational Research, China Pharmaceutical University, Nanjing 211198, China
| | - Kai Gao
- Nanjing Ruiying Runze Biopharmaceutical Technology Co., Inc, Nanjing 210000, China
| | - Junyi Zhu
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, China
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, China
- Jiangsu Key Laboratory of TCM Evaluation and Translational Research, China Pharmaceutical University, Nanjing 211198, China
| | - Bing Wang
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, China
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, China
- Jiangsu Key Laboratory of TCM Evaluation and Translational Research, China Pharmaceutical University, Nanjing 211198, China
| | - Susu Wu
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, China
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, China
- Jiangsu Key Laboratory of TCM Evaluation and Translational Research, China Pharmaceutical University, Nanjing 211198, China
| | - Tao Wang
- Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, Nanjing 210009, China
| | - Jing Shang
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, China
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, China
- Jiangsu Key Laboratory of TCM Evaluation and Translational Research, China Pharmaceutical University, Nanjing 211198, China
- Qinghai Key Laboratory of Tibetan Medicine Pharmacology and Safety Evaluation, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810008, Qinghai Province, China
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16
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Hamm JT, Ceger P, Allen D, Stout M, Maull EA, Baker G, Zmarowski A, Padilla S, Perkins E, Planchart A, Stedman D, Tal T, Tanguay RL, Volz DC, Wilbanks MS, Walker NJ. Characterizing sources of variability in zebrafish embryo screening protocols. ALTEX 2018; 36:103-120. [PMID: 30415271 PMCID: PMC10424490 DOI: 10.14573/altex.1804162] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Accepted: 10/30/2018] [Indexed: 11/23/2022]
Abstract
There is a need for fast, efficient, and cost-effective hazard identification and characterization of chemical hazards. This need is generating increased interest in the use of zebrafish embryos as both a screening tool and an alternative to mammalian test methods. A Collaborative Workshop on Aquatic Models and 21st Century Toxicology identified the lack of appropriate and consistent testing protocols as a challenge to the broader application of the zebrafish embryo model. The National Toxicology Program established the Systematic Evaluation of the Application of Zebrafish in Toxicology (SEAZIT) initiative to address the lack of consistent testing guidelines and identify sources of variability for zebrafish-based assays. This report summarizes initial SEAZIT information-gathering efforts. Investigators in academic, government, and industry laboratories that routinely use zebrafish embryos for chemical toxicity testing were asked about their husbandry practices and standard protocols. Information was collected about protocol components including zebrafish strains, feed, system water, disease surveillance, embryo exposure conditions, and endpoints. Literature was reviewed to assess issues raised by the investigators. Interviews revealed substantial variability across design parameters, data collected, and analysis procedures. The presence of the chorion and renewal of exposure media (static versus static-renewal) were identified as design parameters that could potentially influence study outcomes and should be investigated further with studies to determine chemical uptake from treatment solution into embryos. The information gathered in this effort provides a basis for future SEAZIT activities to promote more consistent practices among researchers using zebrafish embryos for toxicity evaluation.
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Affiliation(s)
- Jon T Hamm
- Integrated Laboratory Systems, Research Triangle Park, NC, USA
| | - Patricia Ceger
- Integrated Laboratory Systems, Research Triangle Park, NC, USA
| | - David Allen
- Integrated Laboratory Systems, Research Triangle Park, NC, USA
| | - Matt Stout
- Division of the National Toxicology Program, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC, USA
| | - Elizabeth A Maull
- National Toxicology Program Interagency Center for the Evaluation of Alternative Toxicological Methods, Division of the National Toxicology Program, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC, USA
| | - Greg Baker
- Battelle, Life Sciences Research, Columbus, OH, USA
| | | | - Stephanie Padilla
- Integrated Systems Toxicology Division, National Health and Environmental Effects Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
| | - Edward Perkins
- United States Army Engineer Research and Development Center, Vicksburg, MS, USA
| | - Antonio Planchart
- Department of Biological Sciences and Center for Human Health and the Environment, North Carolina State University, Raleigh, NC, USA
| | | | - Tamara Tal
- Integrated Systems Toxicology Division, National Health and Environmental Effects Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
| | - Robert L Tanguay
- Department of Environmental & Molecular Toxicology, Oregon State University, Corvallis, OR, USA
| | - David C Volz
- Department of Environmental Sciences, University of California, Riverside, CA, USA
| | - Mitch S Wilbanks
- United States Army Engineer Research and Development Center, Vicksburg, MS, USA
| | - Nigel J Walker
- Division of the National Toxicology Program, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC, USA
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17
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Meyer-Alert H, Ladermann K, Larsson M, Schiwy S, Hollert H, Keiter SH. A temporal high-resolution investigation of the Ah-receptor pathway during early development of zebrafish (Danio rerio). AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2018; 204:117-129. [PMID: 30245344 DOI: 10.1016/j.aquatox.2018.09.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Revised: 09/09/2018] [Accepted: 09/11/2018] [Indexed: 06/08/2023]
Abstract
In order to contribute to a comprehensive understanding of the regulating mechanisms of the aryl-hydrocarbon-receptor (AHR) in zebrafish embryos, we aimed to elucidate the interaction of proteins taking part in this signaling pathway during early development of the zebrafish (Danio rerio) after chemical exposure. We managed to illustrate initial transcription processes of the implemented proteins after exposure to two environmentally relevant chemicals: polychlorinated biphenyl 126 (PCB126) and β-Naphthoflavone (BNF). Using qPCR, we quantified mRNA every 4 h until 118 h post fertilization and found the expression of biotransformation enzymes (cyp1 family) and the repressor of the AHR (ahr-r) to be dependent on the duration of chemical exposure and the biodegradability of the compounds. PCB126 induced persistently increased amounts of transcripts as it is not metabolized, whereas activation by BNF was limited to the initial period of exposure. We did not find a clear relation between the amount of transcripts and activity of the induced CYP-proteins, so posttranscriptional mechanisms are likely to regulate biotransformation of BNF. With regard to zebrafish embryos and their application in risk assessment of hazardous chemicals, our examination of the AHR pathway especially supports the relevance of the time point or period of exposure that is used for bioanalytical investigations and consideration of chemical properties determining biodegradability.
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Affiliation(s)
- Henriette Meyer-Alert
- Department of Ecosystem Analysis, Institute for Environmental Research, ABBt - Aachen Biology and Biotechnology, RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany.
| | - Kim Ladermann
- Department of Ecosystem Analysis, Institute for Environmental Research, ABBt - Aachen Biology and Biotechnology, RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany
| | - Maria Larsson
- Man-Technology-Environment Research Centre, School of Science and Technology, Örebro University, Fakultetsgatan 1, 701 82 Örebro, Sweden
| | - Sabrina Schiwy
- Department of Ecosystem Analysis, Institute for Environmental Research, ABBt - Aachen Biology and Biotechnology, RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany
| | - Henner Hollert
- Department of Ecosystem Analysis, Institute for Environmental Research, ABBt - Aachen Biology and Biotechnology, RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany
| | - Steffen H Keiter
- Man-Technology-Environment Research Centre, School of Science and Technology, Örebro University, Fakultetsgatan 1, 701 82 Örebro, Sweden
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18
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de Souza Anselmo C, Sardela VF, de Sousa VP, Pereira HMG. Zebrafish (Danio rerio): A valuable tool for predicting the metabolism of xenobiotics in humans? Comp Biochem Physiol C Toxicol Pharmacol 2018; 212:34-46. [PMID: 29969680 DOI: 10.1016/j.cbpc.2018.06.005] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Revised: 06/25/2018] [Accepted: 06/27/2018] [Indexed: 12/31/2022]
Abstract
Zebrafish has become a popular model organism in several lines of biological research sharing physiological, morphological and histological similarities with mammals. In fact, many human cytochrome P450 (CYP) enzymes have direct orthologs in zebrafish, suggesting that zebrafish xenobiotic metabolic profiles may be similar to those in mammals. The focus of the review is to analyse the studies that have evaluated the metabolite production in zebrafish over the years, either of the drugs themselves or xenobiotics in general (environmental pollutants, natural products, etc.), bringing a vision of how these works were performed and comparing, where possible, with human metabolism. Early studies that observed metabolic production by zebrafish focused on environmental toxicology, and in recent years the main focus has been on toxicity screening of pharmaceuticals and drug candidates. Nevertheless, there is still a lack of standardization of the model and the knowledge of the extent of similarity with human metabolism. Zebrafish screenings are performed at different life stages, typically being carried out in adult fish through in vivo assays, followed by early larval stages and embryos. Studies comparing metabolism at the different zebrafish life stages are also common. As with any non-human model, the zebrafish presents similarities and differences in relation to the profile of generated metabolites compared to that observed in humans. Although more studies are still needed to assess the degree to which zebrafish metabolism can be compared to human metabolism, the facts presented indicate that the zebrafish is an excellent potential model for assessing xenobiotic metabolism.
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Affiliation(s)
- Carina de Souza Anselmo
- Federal University of Rio de Janeiro, Institute of Chemistry, LBCD-LADETEC, Av Horácio Macedo, 1281, 21941-598, Polo de Química, bloco C, Cidade Universitária, Rio de Janeiro, RJ, Brazil; Federal University of Rio de Janeiro, Department of Drugs and Pharmaceutics, Faculty of Pharmacy, LabCQ, Av Carlos Chagas Filho, 373, 21941-902, Bss36, Cidade Universitária, Rio de Janeiro, RJ, Brazil.
| | - Vinicius Figueiredo Sardela
- Federal University of Rio de Janeiro, Institute of Chemistry, LBCD-LADETEC, Av Horácio Macedo, 1281, 21941-598, Polo de Química, bloco C, Cidade Universitária, Rio de Janeiro, RJ, Brazil; Federal University of Rio de Janeiro, Institute of Chemistry, LPDI-LADETEC, Av Horácio Macedo, 1281, 21941-598, Polo de Química, bloco C, Cidade Universitária, Rio de Janeiro, RJ, Brazil
| | - Valeria Pereira de Sousa
- Federal University of Rio de Janeiro, Department of Drugs and Pharmaceutics, Faculty of Pharmacy, LabCQ, Av Carlos Chagas Filho, 373, 21941-902, Bss36, Cidade Universitária, Rio de Janeiro, RJ, Brazil
| | - Henrique Marcelo Gualberto Pereira
- Federal University of Rio de Janeiro, Institute of Chemistry, LBCD-LADETEC, Av Horácio Macedo, 1281, 21941-598, Polo de Química, bloco C, Cidade Universitária, Rio de Janeiro, RJ, Brazil
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19
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Melvin SD, Leusch FDL, Carroll AR. Metabolite profiles of striped marsh frog (Limnodynastes peronii) larvae exposed to the anti-androgenic fungicides vinclozolin and propiconazole are consistent with altered steroidogenesis and oxidative stress. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2018; 199:232-239. [PMID: 29660695 DOI: 10.1016/j.aquatox.2018.04.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Revised: 04/06/2018] [Accepted: 04/09/2018] [Indexed: 06/08/2023]
Abstract
Amphibians use wetlands in urban and agricultural landscapes for breeding, growth and development. Fungicides and other pesticides used in these areas have therefore been identified as potential threats that could contribute towards amphibian population declines. However, relatively little is known about how such chemicals influence sensitive early life-stages or how short episodic exposures influence sub-lethal physiological and metabolic pathways. The present study applied untargeted metabolomics to evaluate effects in early post-hatch amphibian larvae exposed to the anti-androgenic fungicides vinclozolin and propiconazole. Recently hatched (Gosner developmental stage 25) striped marsh frog (Limnodynastes peronii) larvae were exposed for 96 h to vinclozolin at 17.5, 174.8 and 1748.6 nM and propiconazole at 5.8, 58.4 and 584.4 nM. Nuclear Magnetic Resonance (NMR) spectroscopy was performed on polar metabolites obtained from whole-body extracts. Both fungicides altered metabolite profiles compared to control animals at all concentrations tested, and there were notable differences between the two chemicals. Overall responses were consistent with altered steroidogenesis and/or cholesterol metabolism, with inconsistent responses between the two fungicides likely reflecting minor differences in the mechanisms of action of these chemicals. Broad down-regulation of the tricarboxylic acid (TCA) cycle was also observed and is indicative of oxidative stress. Interestingly, formic acid was significantly increased in larvae exposed to vinclozolin but not propiconazole, suggesting this metabolite may serve as a useful biomarker of exposure to androgen-receptor binding anti-androgenic contaminants. This study demonstrates the power of untargeted metabolomics for distinguishing between similarly acting, but distinct, pollutants and for unraveling non-endocrine responses resulting from exposure to known endocrine active contaminants.
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Affiliation(s)
- Steven D Melvin
- Australian Rivers Institute, Griffith University, Southport, QLD 4222, Australia.
| | - Frederic D L Leusch
- Australian Rivers Institute, Griffith University, Southport, QLD 4222, Australia; Griffith School of Environment, Griffith University, Southport, QLD 4222, Australia
| | - Anthony R Carroll
- Griffith School of Environment, Griffith University, Southport, QLD 4222, Australia
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20
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Melvin SD, Jones OAH, Carroll AR, Leusch FDL. 1H NMR-based metabolomics reveals interactive effects between the carrier solvent methanol and a pharmaceutical mixture in an amphibian developmental bioassay with Limnodynastes peronii. CHEMOSPHERE 2018; 199:372-381. [PMID: 29453063 DOI: 10.1016/j.chemosphere.2018.02.063] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Revised: 01/22/2018] [Accepted: 02/08/2018] [Indexed: 06/08/2023]
Abstract
Organic carrier solvents are used in aquatic toxicity testing to improve chemical solubility and facilitate the exploration of dose-response relationships. Both water- and solvent-control groups are normally included in these scenarios to ensure that the solvent itself has no effect on the test organism, but this fails to consider possible interactive effects between carrier solvents and contaminants of interest. We explored this topic by exposing Limnodynastes peronii tadpoles to a mixture of common water-soluble pharmaceuticals (diclofenac, metformin and valproic acid) in the presence and absence of the carrier solvent methanol, according to standard developmental bioassay methodology. Nuclear Magnetic Resonance (NMR) spectroscopy was applied as a platform for untargeted metabolomics, to compare broad sub-lethal hepatotoxicity in solvent- and solvent-free exposure scenarios. Considerable interactive effects were identified between the pharmaceutical mixture and a typical dose of methanol (0.003%). Specifically, pronounced differences were observed between the solvent- and solvent-free exposure groups for leucine, acetate, glutamine, citrate, glycogen, tyrosine, arginine, purine nucleotides and an unidentified metabolite at 6.53 ppm. Various other metabolites exhibited similar disparity related to the use of carrier solvent, but the interactions were non-significant. These results raise important questions about the use of carrier solvents for chemical exposures in aquatic ecotoxicology, and particularly for studies interested in sub-lethal mechanistic information and/or biomarker discovery.
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Affiliation(s)
- Steven D Melvin
- Australian Rivers Institute, Griffith University, Southport QLD, 4222, Australia.
| | - Oliver A H Jones
- Australian Centre for Research on Separation Science, School of Science, RMIT University, GPO Box 2476, Melbourne, VIC, 3001, Australia
| | - Anthony R Carroll
- Griffith School of Environment, Griffith University, Southport QLD, 4222, Australia
| | - Frederic D L Leusch
- Australian Rivers Institute, Griffith University, Southport QLD, 4222, Australia; Australian Centre for Research on Separation Science, School of Science, RMIT University, GPO Box 2476, Melbourne, VIC, 3001, Australia
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21
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Huang Y, Cartlidge R, Walpitagama M, Kaslin J, Campana O, Wlodkowic D. Unsuitable use of DMSO for assessing behavioral endpoints in aquatic model species. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 615:107-114. [PMID: 28963892 DOI: 10.1016/j.scitotenv.2017.09.260] [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: 05/04/2017] [Revised: 09/23/2017] [Accepted: 09/24/2017] [Indexed: 06/07/2023]
Abstract
Dimethyl sulfoxide (DMSO) is a universally used aprotic solvent with the ability to permeate biological membranes and thus is commonly used to achieve appropriate biological availability of hydrophobic toxicants. While DMSO as a carrier medium has a reportedly low toxicity and is routinely employed in ecotoxicology, very little is known about its effect on dynamic behavioral parameters. This study presents a comparative analysis of the lethal and behavioral effects of exposures to DMSO concentrations of 0.1-10% on several test species such as: neonates of the freshwater crustacean Daphnia magna, nauplii of the marine crustacean Artemia franciscana, the marine crustacean Allorchestes compressa, embryos and larvae of the freshwater fish Danio rerio. The results demonstrated that DMSO did not cause statistically significant mortality even at concentrations close to 1% but induced clear and significant behavioral abnormalities in response to sublethal concentrations on all test species. These included hypoactivity syndrome in A. franciscana, A. compressa, D. magna and zebrafish larvae while a slight time-dependent hyperactivity response was observed in zebrafish embryos. For the majority of test species, behavioral changes such as moving distance, acceleration and burst movement were often observed during the first hours of exposure. These results indicate that caution should be exercised when using DMSO as a carrier solvent in experiments assessing behavioral endpoints.
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Affiliation(s)
- Yushi Huang
- School of Science, RMIT University, Melbourne, VIC, Australia
| | - Rhys Cartlidge
- School of Science, RMIT University, Melbourne, VIC, Australia
| | | | - Jan Kaslin
- ARMI, Monash University, Wellington Rd, Clayton, VIC, Australia
| | - Olivia Campana
- Instituto de Ciencias Marinas de Andalucia, CSIC, Cadiz, Spain
| | - Donald Wlodkowic
- School of Science, RMIT University, Melbourne, VIC, Australia; Centre for Environmental Sustainability and Remediation (EnSuRe), RMIT University, Melbourne, VIC, Australia.
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22
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Hu LX, Tian F, Martin FL, Ying GG. Biochemical alterations in duckweed and algae induced by carrier solvents: Selection of an appropriate solvent in toxicity testing. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2017; 36:2631-2639. [PMID: 28337778 DOI: 10.1002/etc.3804] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Revised: 03/05/2017] [Accepted: 03/22/2017] [Indexed: 06/06/2023]
Abstract
Carrier solvents are often used in aquatic toxicity testing for test chemicals with hydrophobic properties. However, the knowledge of solvent effects on test organisms remains limited. The present study aimed to determine the biochemical effects of the 4 common solvents methanol, ethanol, acetone, and dimethyl sulfoxide (DMSO) on 2 test species, Lemna minor and Raphidocelis subcapitata, by applying Fourier transform infrared spectroscopy (FTIR) coupled with multivariate analysis to select appropriate solvents for toxicity testing. The results showed biochemical variations associated with solvent treatments at different doses on test species. From the infrared spectra obtained, the structures of lipid membrane and protein phosphorylation in the test species were found to be sensitive to the solvents. Methanol and ethanol mainly affected the protein secondary structure, whereas acetone and DMSO primarily induced alterations in carbohydrates and proteins in the test species. The FTIR results demonstrated that methanol and ethanol showed higher biochemical alterations in the test species than acetone and DMSO, especially at the high doses (0.1 and 1% v/v). Based on the growth inhibition displayed and FTIR spectroscopy, acetone, and DMSO can be used as carrier solvents in toxicity testing when their doses are lower than 0.1% v/v. Environ Toxicol Chem 2017;36:2631-2639. © 2017 SETAC.
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Affiliation(s)
- Li-Xin Hu
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Fei Tian
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China
| | - Francis L Martin
- School of Pharmacy and Biomedical Sciences, University of Central Lancashire, Preston, Lancashire, United Kingdom
| | - Guang-Guo Ying
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China
- The Environmental Research Institute, MOE Key Laboratory of Environmental Theoretical Chemistry, South China Normal University, Guangzhou, China
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23
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Melvin SD, Habener LJ, Leusch FDL, Carroll AR. 1H NMR-based metabolomics reveals sub-lethal toxicity of a mixture of diabetic and lipid-regulating pharmaceuticals on amphibian larvae. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2017; 184:123-132. [PMID: 28131079 DOI: 10.1016/j.aquatox.2017.01.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2016] [Revised: 01/20/2017] [Accepted: 01/21/2017] [Indexed: 06/06/2023]
Abstract
Pharmaceuticals are widely used for the treatment of various physical and psychological ailments. Due to incomplete removal during sewage treatment many pharmaceuticals are frequently detected in aquatic waterways at trace concentrations. The diversity of pharmaceutical contaminants and potential for complex mixtures to occur makes it very difficult to predict the toxicity of these compounds on wildlife, and robust methods are therefore needed to explore sub-lethal effects. Metabolic syndrome is one of the most widespread health concerns currently facing the human population, and various drugs, including anti-diabetic medications and lipid- and cholesterol-lowering fibrates and statins, are widely prescribed as treatment. In this study, we exposed striped marsh frog (Limnodynastes peronii) tadpoles to a mixture of the drugs metformin, atorvastatin and bezafibrate at 0.5, 5, 50 and 500μg/L to explore possible effects on growth and development, energy reserves (triglycerides and cholesterol), and profiles of small polar metabolites extracted from hepatic tissues. It was hypothesised that exposure would result in a general reduction in energy reserves, and that this would subsequently correspond with reduced growth and development. Responses differed from expected outcomes based on the known mechanisms of these compounds in humans, with no changes to hepatic triglycerides or cholesterol and a general increase in mass and condition with increasing exposure concentration. Deviation from the expected response patterns may be explained by differences in the receptivity or uptake of the compounds in non-mammalian species. Proton nuclear magnetic resonance (1H NMR) spectroscopy revealed evidence of broad metabolic dysregulation in exposed animals, and possible interaction between the solvent and mixture. Specifically, increased lactic acid and branched-chain amino acids were observed, with responses tending to follow a non-monotonic pattern. Overall, results demonstrate that a mixture of drugs commonly prescribed to treat human metabolic syndrome is capable of eliciting physiological and developmental effects on larval amphibians. Importantly, outcomes further suggest that it may not be possible to predict toxicological effects in non-target wildlife based on our knowledge of how these compounds act in humans.
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Affiliation(s)
- Steven D Melvin
- Australian Rivers Institute, Griffith University, Southport, QLD 4222, Australia.
| | - Leesa J Habener
- Griffith School of Environment, Griffith University, Southport, QLD 4222, Australia
| | - Frederic D L Leusch
- Australian Rivers Institute, Griffith University, Southport, QLD 4222, Australia; Griffith School of Environment, Griffith University, Southport, QLD 4222, Australia
| | - Anthony R Carroll
- Griffith School of Environment, Griffith University, Southport, QLD 4222, Australia
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24
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White DT, Eroglu AU, Wang G, Zhang L, Sengupta S, Ding D, Rajpurohit SK, Walker SL, Ji H, Qian J, Mumm JS. ARQiv-HTS, a versatile whole-organism screening platform enabling in vivo drug discovery at high-throughput rates. Nat Protoc 2016; 11:2432-2453. [PMID: 27831568 DOI: 10.1038/nprot.2016.142] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The zebrafish has emerged as an important model for whole-organism small-molecule screening. However, most zebrafish-based chemical screens have achieved only mid-throughput rates. Here we describe a versatile whole-organism drug discovery platform that can achieve true high-throughput screening (HTS) capacities. This system combines our automated reporter quantification in vivo (ARQiv) system with customized robotics, and is termed 'ARQiv-HTS'. We detail the process of establishing and implementing ARQiv-HTS: (i) assay design and optimization, (ii) calculation of sample size and hit criteria, (iii) large-scale egg production, (iv) automated compound titration, (v) dispensing of embryos into microtiter plates, and (vi) reporter quantification. We also outline what we see as best practice strategies for leveraging the power of ARQiv-HTS for zebrafish-based drug discovery, and address technical challenges of applying zebrafish to large-scale chemical screens. Finally, we provide a detailed protocol for a recently completed inaugural ARQiv-HTS effort, which involved the identification of compounds that elevate insulin reporter activity. Compounds that increased the number of insulin-producing pancreatic beta cells represent potential new therapeutics for diabetic patients. For this effort, individual screening sessions took 1 week to conclude, and sessions were performed iteratively approximately every other day to increase throughput. At the conclusion of the screen, more than a half million drug-treated larvae had been evaluated. Beyond this initial example, however, the ARQiv-HTS platform is adaptable to almost any reporter-based assay designed to evaluate the effects of chemical compounds in living small-animal models. ARQiv-HTS thus enables large-scale whole-organism drug discovery for a variety of model species and from numerous disease-oriented perspectives.
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Affiliation(s)
- David T White
- Department of Ophthalmology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.,Department of Cellular Biology and Anatomy, Augusta University, Augusta, Georgia, USA
| | - Arife Unal Eroglu
- Department of Ophthalmology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Guohua Wang
- Department of Ophthalmology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Liyun Zhang
- Department of Ophthalmology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Sumitra Sengupta
- Department of Ophthalmology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Ding Ding
- Department of Biostatistics, Johns Hopkins University Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Surendra K Rajpurohit
- Department of Cellular Biology and Anatomy, Augusta University, Augusta, Georgia, USA
| | - Steven L Walker
- Department of Cellular Biology and Anatomy, Augusta University, Augusta, Georgia, USA
| | - Hongkai Ji
- Department of Biostatistics, Johns Hopkins University Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Jiang Qian
- Department of Ophthalmology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Jeff S Mumm
- Department of Ophthalmology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.,Department of Cellular Biology and Anatomy, Augusta University, Augusta, Georgia, USA
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25
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Influence of fullerene (C60) on soil bacterial communities: aqueous aggregate size and solvent co-introduction effects. Sci Rep 2016; 6:28069. [PMID: 27306076 PMCID: PMC4910098 DOI: 10.1038/srep28069] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Accepted: 05/31/2016] [Indexed: 11/08/2022] Open
Abstract
Fullerene C60 nanoparticles are being used in broad range of applications. It is important to assess their potential impacts in the environment. We evaluated the effects of C60 introduced as aqueous suspensions of nC60 aggregates of different particle size or via organic solvents on soils with different organic matter contents in this study. Impacts of the application were evaluated by measuring total microbial biomass, metabolic activity and bacterial community structure. Results show that nC60 aggregates, introduced as an aqueous suspension, had size-dependent effects on soil bacterial community composition in the low organic matter system, but induced minimal change in the microbial biomass and metabolic activity in soils with both high and low organic matter contents. Fullerene C60, co-introduced via an organic solvent, did not influence the response of soil microbes to the organic solvents. Our results suggest that nC60 aggregates of smaller size may have negative impact on soil biota and soil organic matter may play a key role in modulating the environmental effect of nanomaterials.
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26
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Gottardi M, Kretschmann A, Cedergreen N. Measuring cytochrome P450 activity in aquatic invertebrates: a critical evaluation of in vitro and in vivo methods. ECOTOXICOLOGY (LONDON, ENGLAND) 2016; 25:419-430. [PMID: 26686507 DOI: 10.1007/s10646-015-1600-z] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 12/09/2015] [Indexed: 06/05/2023]
Abstract
The first step in xenobiotic detoxification in aquatic invertebrates is mainly governed by the cytochrome P450 mixed function oxidase system. The ability to measure cytochrome P450 activity provides an important tool to understand macroinvertebrates' responses to chemical stressors. However, measurements of P450 activity in small aquatic invertebrates have had variable success and a well characterized assay is not yet available. The general lack of success has been scarcely investigated and it is therefore the focus of the present work. In particular, the suitability of the substrate selected for the assay, the sensitivity of the assay and the possible inhibition/attenuation of enzymatic activity caused by endogenous substances were investigated. 7-ethoxycoumarin-O-dealkylation activity of Daphnia magna, Chironomus riparius larvae and Hyalella azteca was assessed in vivo and in vitro and possible inhibition of enzymatic activity by macroinvertebrates homogenate was investigated. Activities of D. magna and C. riparius larvae measured in vivo were 1.37 ± 0.08 and 2.2 ± 0.2 pmol h(-1) organism(-1), respectively, while activity of H. azteca could not be detected. In vitro activity could be measured in C. riparius larvae only (500-1000 pmol h(-1) mg microsomal protein(-1)). The optimization of the in vitro assay has been especially long and resource consuming and particularly for D. magna, substances that inhibited cytochrome P450 activity seemed to be released during tissue homogenization preventing activity measurements in vitro. We therefore recommend testing the P450 inhibition potential of homogenate preparations prior to any investigation of P450 activity in vitro in macroinvertebrates.
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Affiliation(s)
- Michele Gottardi
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, 1871, Frederiksberg, Denmark.
| | - Andreas Kretschmann
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, 1871, Frederiksberg, Denmark
- Department of Pharmacy, Analytical Biosciences, University of Copenhagen, Universitetsparken 2, 2100, Copenhagen, Denmark
| | - Nina Cedergreen
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, 1871, Frederiksberg, Denmark
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27
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Nishimura Y, Inoue A, Sasagawa S, Koiwa J, Kawaguchi K, Kawase R, Maruyama T, Kim S, Tanaka T. Using zebrafish in systems toxicology for developmental toxicity testing. Congenit Anom (Kyoto) 2016; 56:18-27. [PMID: 26537640 DOI: 10.1111/cga.12142] [Citation(s) in RCA: 136] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2015] [Accepted: 10/27/2015] [Indexed: 12/20/2022]
Abstract
With the high cost and the long-term assessment of developmental toxicity testing in mammals, the vertebrate zebrafish has become a useful alternative model organism for high-throughput developmental toxicity testing. Zebrafish is also very favorable for the 3R perspective in toxicology; however, the methodologies used by research groups vary greatly, posing considerable challenges to integrative analysis. In this review, we discuss zebrafish developmental toxicity testing, focusing on the methods of chemical exposure, the assessment of morphological abnormalities, housing conditions and their effects on the production of healthy embryos, and future directions. Zebrafish as a systems toxicology model has the potential to elucidate developmental toxicity pathways, and to provide a sound basis for human health risk assessments.
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Affiliation(s)
- Yuhei Nishimura
- Department of Molecular and Cellular Pharmacology, Pharmacogenomics and Pharmacoinformatics, Mie University Graduate School of Medicine, Tsu, Mie.,Mie University Medical Zebrafish Research Center, Tsu, Mie.,Department of Systems Pharmacology, Mie University Graduate School of Medicine, Tsu, Mie.,Department of Omics Medicine, Mie University Industrial Technology Innovation Institute, Tsu, Mie.,Department of Bioinformatics, Mie University Life Science Research Center, Tsu, Mie
| | | | - Shota Sasagawa
- Department of Molecular and Cellular Pharmacology, Pharmacogenomics and Pharmacoinformatics, Mie University Graduate School of Medicine, Tsu, Mie
| | - Junko Koiwa
- Department of Molecular and Cellular Pharmacology, Pharmacogenomics and Pharmacoinformatics, Mie University Graduate School of Medicine, Tsu, Mie
| | - Koki Kawaguchi
- Department of Molecular and Cellular Pharmacology, Pharmacogenomics and Pharmacoinformatics, Mie University Graduate School of Medicine, Tsu, Mie
| | - Reiko Kawase
- Department of Molecular and Cellular Pharmacology, Pharmacogenomics and Pharmacoinformatics, Mie University Graduate School of Medicine, Tsu, Mie
| | | | - Soonih Kim
- Ono Pharmaceutical Co, Ltd, Osaka, Japan
| | - Toshio Tanaka
- Department of Molecular and Cellular Pharmacology, Pharmacogenomics and Pharmacoinformatics, Mie University Graduate School of Medicine, Tsu, Mie.,Mie University Medical Zebrafish Research Center, Tsu, Mie.,Department of Systems Pharmacology, Mie University Graduate School of Medicine, Tsu, Mie.,Department of Omics Medicine, Mie University Industrial Technology Innovation Institute, Tsu, Mie.,Department of Bioinformatics, Mie University Life Science Research Center, Tsu, Mie
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28
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Akhtar MT, Mushtaq MY, Verpoorte R, Richardson MK, Choi YH. Zebrafish as a Model for Systems Medicine R&D: Rethinking the Metabolic Effects of Carrier Solvents and Culture Buffers Determined by (1)H NMR Metabolomics. OMICS-A JOURNAL OF INTEGRATIVE BIOLOGY 2015; 20:42-52. [PMID: 26669610 DOI: 10.1089/omi.2015.0119] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Zebrafish is a frequently employed model organism in systems medicine and biomarker discovery. A crosscutting fundamental question, and one that has been overlooked in the field, is the "system-wide" (omics) effects induced in zebrafish by metabolic solvents and culture buffers. Indeed, any bioactivity or toxicity test requires that the target compounds are dissolved in an appropriate nonpolar solvent or aqueous media. It is important to know whether the solvent or the buffer itself has an effect on the zebrafish model organism. We evaluated the effects of two organic carrier solvents used in research with zebrafish, as well as in drug screening: dimethyl sulfoxide (DMSO) and ethanol, and two commonly used aqueous buffers (egg water and Hank's balanced salt solution). The effects of three concentrations (0.01, 0.1, and 1%) of DMSO and ethanol were tested in the 5-day-old zebrafish embryo using proton nuclear magnetic resonance ((1)H NMR) based metabolomics. DMSO (1% and 0.1%, but not 0.01%) exposure significantly decreased the levels of adenosine triphosphate (ATP), betaine, alanine, histidine, lactate, acetate, and creatine (p < 0.05). By contrast, ethanol exposure did not alter the embryos' metabolome at any concentration tested. The two different aqueous media noted above impacted the zebrafish embryo metabolome as evidenced by changes in valine, alanine, lactate, acetate, betaine, glycine, glutamate, adenosine triphosphate, and histidine. These results show that DMSO has greater effects on the embryo metabolome than ethanol, and thus is used with caution as a carrier solvent in zebrafish biomarker research and oral medicine. Moreover, the DMSO concentration should not be higher than 0.01%. Careful attention is also warranted for the use of the buffers egg water and Hank's balanced salt solution in zebrafish. In conclusion, as zebrafish is widely used as a model organism in life sciences, metabolome changes induced by solvents and culture buffers warrant further attention for robust systems science, and precision biomarkers that will stand the test of time.
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Affiliation(s)
- Muhammad T Akhtar
- 1 Natural Products Laboratory, Leiden University , Leiden, the Netherlands .,3 Laboratory of Natural Products, Institute of Bioscience, University Putra Malaysia , Serdang, Malaysia
| | - Mian Y Mushtaq
- 1 Natural Products Laboratory, Leiden University , Leiden, the Netherlands .,4 Department of Pharmaceutical Chemistry, Faculty of Pharmacy, International Islamic University , Kuantan, Malaysia
| | - Robert Verpoorte
- 1 Natural Products Laboratory, Leiden University , Leiden, the Netherlands
| | - Michael K Richardson
- 2 Sylvius Laboratory, Institute of Biology, Leiden University , Leiden, the Netherlands
| | - Young H Choi
- 1 Natural Products Laboratory, Leiden University , Leiden, the Netherlands
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29
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de Koning C, Beekhuijzen M, Tobor-Kapłon M, de Vries-Buitenweg S, Schoutsen D, Leeijen N, van de Waart B, Emmen H. Visualizing Compound Distribution during Zebrafish Embryo Development: The Effects of Lipophilicity and DMSO. ACTA ACUST UNITED AC 2015; 104:253-72. [PMID: 26663754 DOI: 10.1002/bdrb.21166] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2015] [Accepted: 11/11/2015] [Indexed: 11/08/2022]
Abstract
The predictability of the zebrafish embryo model is highly influenced by internal exposure of the embryo/larva. As compound uptake is likely to be influenced by factors such as lipophilicity, solvent use, and chorion presence, this article focuses on investigating their effects on compound distribution within the zebrafish embryo. To visualize compound uptake and distribution, zebrafish embryos were exposed for 96 hr, starting at 4 hr postfertilization, to water-soluble dyes: Schiff's reagent (logP -4.63), Giemsa stain (logP -0.77), Van Gierson stain (logP 1.64), Cresyl fast violet (logP 3.5), Eosine Y (logP 4.8), Sudan III (logP 7.5), and Oil red O (logP 9.81), with and without 1% dimethyl-sulfoxide (DMSO). Three additional compounds were used to analytically determine the uptake and distribution: Acyclovir (logP -1.56), Zidovudine (logP 0.05), and Metoprolol Tartrate Salt (logP 1.8). Examinations were performed every 24 hr. Both methods (visualization and specific analysis) showed that exposure to higher logP values results in higher compound uptake. Specific analysis showed that for lipophilic compounds >90% of compound is taken up by the embryo. For hydrophilic compounds, >90% of compound within the complete egg could not be associated to embryo or chorion and is probably distributed into the perivitelline space. Overall, internal exposure analyses on at least two occasions (i.e., before and after hatching) is crucial for interpretation of zebrafish embryotoxicity data, especially for compounds with extreme logP values. DMSO did not affect exposure when examined with the visualization method, however, this method might be not sensitive enough to draw hard conclusions.
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Affiliation(s)
- Coco de Koning
- WIL Research Europe B.V, Hambakenwetering 7, 's-Hertogenbosch, The Netherlands
| | - Manon Beekhuijzen
- WIL Research Europe B.V, Hambakenwetering 7, 's-Hertogenbosch, The Netherlands
| | | | | | - Dick Schoutsen
- WIL Research Europe B.V, Hambakenwetering 7, 's-Hertogenbosch, The Netherlands
| | - Nico Leeijen
- WIL Research Europe B.V, Hambakenwetering 7, 's-Hertogenbosch, The Netherlands
| | - Beppy van de Waart
- WIL Research Europe B.V, Hambakenwetering 7, 's-Hertogenbosch, The Netherlands
| | - Harry Emmen
- WIL Research Europe B.V, Hambakenwetering 7, 's-Hertogenbosch, The Netherlands
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30
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Garcia-Käufer M, Gartiser S, Hafner C, Schiwy S, Keiter S, Gründemann C, Hollert H. Genotoxic and teratogenic effect of freshwater sediment samples from the Rhine and Elbe River (Germany) in zebrafish embryo using a multi-endpoint testing strategy. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:16341-16357. [PMID: 25471716 DOI: 10.1007/s11356-014-3894-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Accepted: 11/20/2014] [Indexed: 06/04/2023]
Abstract
The embryotoxic potential of three model sediment samples with a distinct and well-characterized pollutant burden from the main German river basins Rhine and Elbe was investigated. The Fish Embryo Contact Test (FECT) in zebrafish (Danio rerio) was applied and submitted to further development to allow for a comprehensive risk assessment of such complex environmental samples. As particulate pollutants are constructive constituents of sediments, they underlay episodic source-sink dynamics, becoming available to benthic organisms. As bioavailability of xenobiotics is a crucial factor for ecotoxicological hazard, we focused on the direct particle-exposure pathway, evaluating throughput-capable endpoints and considering toxicokinetics. Fish embryo and larvae were exposed toward reconstituted (freeze-dried) sediment samples on a microcosm-scale experimental approach. A range of different developmental embryonic stages were considered to gain knowledge of potential correlations with metabolic competence during the early embryogenesis. Morphological, physiological, and molecular endpoints were investigated to elucidate induced adverse effects, placing particular emphasis on genomic instability, assessed by the in vivo comet assay. Flow cytometry was used to investigate the extent of induced cell death, since cytotoxicity can lead to confounding effects. The implementation of relative toxicity indices further provides inter-comparability between samples and related studies. All of the investigated sediments represent a significant ecotoxicological hazard by disrupting embryogenesis in zebrafish. Beside the induction of acute toxicity, morphological and physiological embryotoxic effects could be identified in a concentration-response manner. Increased DNA strand break frequency was detected after sediment contact in characteristic non-monotonic dose-response behavior due to overlapping cytotoxic effects. The embryonic zebrafish toxicity model along with the in vivo comet assay and molecular biomarker analysis should prospectively be considered to assess the ecotoxicological potential of sediments allowing for a comprehensive hazard ranking. In order to elucidate mode of action, novel techniques such as flow cytometry have been adopted and proved to be valuable tools for advanced risk assessment and management.
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Affiliation(s)
- M Garcia-Käufer
- Hydrotox GmbH, Bötzingerstr. 109, 79098, Freiburg, Germany.
- Department of Ecosystem Analysis, Institute for Environmental Research, ABBT-Aachen Biology and Biotechnology, RWTH Aachen University, Worringerweg 1, 52074, Aachen, Germany.
- Center for Complementary Medicine, Department of Environmental Health Sciences, University Medical Centre Freiburg, Breisacherstr. 115b, 79106, Freiburg, Germany.
- Department of Environmental Health Sciences, University Medical Centre Freiburg, Breisacherstr. 115b, 79106, Freiburg, Germany.
| | - S Gartiser
- Hydrotox GmbH, Bötzingerstr. 109, 79098, Freiburg, Germany
| | - C Hafner
- Hydrotox GmbH, Bötzingerstr. 109, 79098, Freiburg, Germany
| | - S Schiwy
- Department of Ecosystem Analysis, Institute for Environmental Research, ABBT-Aachen Biology and Biotechnology, RWTH Aachen University, Worringerweg 1, 52074, Aachen, Germany
| | - S Keiter
- Department of Ecosystem Analysis, Institute for Environmental Research, ABBT-Aachen Biology and Biotechnology, RWTH Aachen University, Worringerweg 1, 52074, Aachen, Germany
- Man-Technology-Environment Research Centre, School of Science and Technology, Örebro University, 70182, Örebro, Sweden
| | - C Gründemann
- Center for Complementary Medicine, Department of Environmental Health Sciences, University Medical Centre Freiburg, Breisacherstr. 115b, 79106, Freiburg, Germany
| | - H Hollert
- Department of Ecosystem Analysis, Institute for Environmental Research, ABBT-Aachen Biology and Biotechnology, RWTH Aachen University, Worringerweg 1, 52074, Aachen, Germany
- School of Environment, Nanjing University, Nanjing, China
- Key Laboratory of Yangtze River Environment of Education Ministry of China, College of Environmental Science and Engineering, Tongji University, Shanghai, China
- College of Resources and Environmental Science, Chongqing University, Chongqing, China
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Hafner C, Gartiser S, Garcia-Käufer M, Schiwy S, Hercher C, Meyer W, Achten C, Larsson M, Engwall M, Keiter S, Hollert H. Investigations on sediment toxicity of German rivers applying a standardized bioassay battery. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:16358-16370. [PMID: 25948379 DOI: 10.1007/s11356-015-4482-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2014] [Accepted: 03/31/2015] [Indexed: 06/04/2023]
Abstract
River sediments may contain a huge variety of environmental contaminants and play a key role in the ecological status of aquatic ecosystems. Contaminants adsorbed to sediments and suspended solids may contribute directly or after remobilization to an adverse ecological and chemical status of surface water. In this subproject of the joint research project DanTox, acetonic Soxhlet extracts from three German river sediments from the River Rhine (Altrip and Ehrenbreitstein with moderate contamination) and River Elbe (Veringkanal Hamburg heavily contaminated) were prepared and redissolved in dimethyl sulfoxide (DMSO). These extracts were analyzed with a standard bioassay battery with organisms from different trophic levels (bacteria, algae, Daphnia, fish) as well as in the Ames test and the umuC test for bacterial mutagenicity and genotoxicity according to the respective OECD and ISO guidelines. In total, 0.01% (standard) up to 0.25% (only fish embryo test) of the DMSO sediment extract was dosed to the test systems resulting in maximum sediment equivalent concentrations (SEQ) of 2 up to 50 g l(-1). The sediment of Veringkanal near Hamburg harbor was significantly more toxic in most tests compared to the sediment extracts from Altrip and Ehrenbreitstein from the River Rhine. The most toxic effect found for Veringkanal was in the algae test with an ErC50 (72 h) of 0.00226 g l(-1) SEQ. Ehrenbreitstein and Altrip samples were about factor 1,000 less toxic. In the Daphnia, Lemna, and acute fish toxicity tests, no toxicity at all was found at 2 g l(-1) SEQ. corresponding to 0.01% DMSO. Only when increasing the DMSO concentration the fish embryo test showed a 22-fold higher toxicity for Veringkanal than for Ehrenbreitstein and Altrip samples, while the toxicity difference was less evident for the Daphnia test due to the overlaying solvent toxicity above 0.05% dimethyl sulfoxide (DMSO). The higher toxicities observed with the Veringkanal sample are supported by the PAH and PCB concentrations analyzed in the sediments. The sediment extracts of Altrip and Veringkanal were mutagenic in the Ames tester strain TA98 with metabolic activation (S9-mix). The findings allow a better ecotoxicological characterization of the sediments extensively analyzed in all subprojects of the DanTox project (e.g., Garcia-Kaeufer et al. Environ Sci Pollut Res. doi: 10.1007/s11356-014-3894-4 , 2014; Schiwy et al. Environ Sci Pollut Res. doi: 10.1007/s11356-014-3185-0 , 2014; Hollert and Keiter 2015). In the absence of agreed limit values for sediment extracts in standard tests, further data with unpolluted reference sediments are required for a quantitative risk assessment of the investigated polluted sediments.
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Affiliation(s)
- Christoph Hafner
- Hydrotox GmbH, Bötzinger Straße 29, 79111, Freiburg i.Br., Germany.
| | - Stefan Gartiser
- Hydrotox GmbH, Bötzinger Straße 29, 79111, Freiburg i.Br., Germany
| | - Manuel Garcia-Käufer
- Hydrotox GmbH, Bötzinger Straße 29, 79111, Freiburg i.Br., Germany
- Department of Ecosystem Analysis, Institute for Environmental Research, ABBt - Aachen Biology and Biotechnology, RWTH Aachen University, Worringerweg 1, 52074, Aachen, Germany
| | - Sabrina Schiwy
- Department of Ecosystem Analysis, Institute for Environmental Research, ABBt - Aachen Biology and Biotechnology, RWTH Aachen University, Worringerweg 1, 52074, Aachen, Germany
| | | | - Wiebke Meyer
- Institute of Geology and Palaeontology - Applied Geology, University of Münster, Corrensstraße 24, 48149, Münster, Germany
| | - Christine Achten
- Institute of Geology and Palaeontology - Applied Geology, University of Münster, Corrensstraße 24, 48149, Münster, Germany
| | - Maria Larsson
- Man-Technology-Environment Research Center, School of Science and Technology, Örebro University, 70182, Örebro, Sweden
| | - Magnus Engwall
- Man-Technology-Environment Research Center, School of Science and Technology, Örebro University, 70182, Örebro, Sweden
| | - Steffen Keiter
- Department of Ecosystem Analysis, Institute for Environmental Research, ABBt - Aachen Biology and Biotechnology, RWTH Aachen University, Worringerweg 1, 52074, Aachen, Germany
- Man-Technology-Environment Research Center, School of Science and Technology, Örebro University, 70182, Örebro, Sweden
| | - Henner Hollert
- Department of Ecosystem Analysis, Institute for Environmental Research, ABBt - Aachen Biology and Biotechnology, RWTH Aachen University, Worringerweg 1, 52074, Aachen, Germany
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Lee JW, Won EJ, Raisuddin S, Lee JS. Significance of adverse outcome pathways in biomarker-based environmental risk assessment in aquatic organisms. J Environ Sci (China) 2015; 35:115-127. [PMID: 26354700 DOI: 10.1016/j.jes.2015.05.002] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2015] [Revised: 05/22/2015] [Accepted: 05/28/2015] [Indexed: 06/05/2023]
Abstract
In environmental risk assessments (ERA), biomarkers have been widely used as an early warning signal of environmental contamination. However, biomarker responses have limitation due to its low relevance to adverse outcomes (e.g., fluctuations in community structure, decreases in population size, and other similar ecobiologically relevant indicators of community structure and function). To mitigate these limitations, the concept of adverse outcome pathways (AOPs) was developed. An AOP is an analytical, sequentially progressive pathway that links a molecular initiating event (MIE) to an adverse outcome. Recently, AOPs have been recognized as a potential informational tool by which the implications of molecular biomarkers in ERA can be better understood. To demonstrate the utility of AOPs in biomarker-based ERA, here we discuss a series of three different biological repercussions caused by exposure to benzo(a)pyrene (BaP), silver nanoparticles (AgNPs), and selenium (Se). Using mainly aquatic invertebrates and selected vertebrates as model species, we focus on the development of the AOP concept. Aquatic organisms are suitable bioindicator species whose entire lifespans can be observed over a short period; moreover, these species can be studied on the molecular and population levels. Also, interspecific differences between aquatic organisms are important to consider in an AOP framework, since these differences are an integral part of the natural environment. The development of an environmental pollutant-mediated AOP may enable a better understanding of the effects of environmental pollutants in different scenarios in the diverse community of an ecosystem.
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Affiliation(s)
- Jin Wuk Lee
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon 440-746, South Korea
| | - Eun-Ji Won
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon 440-746, South Korea
| | - Sheikh Raisuddin
- Department of Medical Elementology and Toxicology, Hamdard University, New Delhi 110062, India
| | - Jae-Seong Lee
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon 440-746, South Korea.
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From cutting edge to guideline: A first step in harmonization of the zebrafish embryotoxicity test (ZET) by describing the most optimal test conditions and morphology scoring system. Reprod Toxicol 2015; 56:64-76. [DOI: 10.1016/j.reprotox.2015.06.050] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Revised: 05/09/2015] [Accepted: 06/09/2015] [Indexed: 11/18/2022]
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He Q, Wang X, Sun P, Wang Z, Wang L. Acute and chronic toxicity of tetrabromobisphenol A to three aquatic species under different pH conditions. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2015; 164:145-154. [PMID: 25980965 DOI: 10.1016/j.aquatox.2015.05.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2015] [Revised: 05/03/2015] [Accepted: 05/04/2015] [Indexed: 06/04/2023]
Abstract
Tetrabromobisphenol A (TBBPA) is a well-known brominated flame retardant. It has been detected in the environment and shows high acute toxicity to different organisms at high concentrations. In this work, the effects of pH and dimethyl sulfoxide (DMSO) on the acute toxicity of TBBPA to Daphnia magna and Limnodrilus hoffmeisteri were tested, and the oxidative stress induced by TBBPA in livers of Carassius auratus was assessed using four biomarkers. The integrated biomarker response (IBR) was applied to assess the overall antioxidant status in fish livers. Moreover, fish tissues (gills and livers) were also studied histologically. The results showed that low pH and DMSO enhanced the toxicity of TBBPA. Furthermore, changes in the activity of antioxidant enzymes and glutathione level suggested that TBBPA generates oxidative stress in fish livers. The IBR index revealed that fish exposed to 3mg/L TBBPA experienced more serious oxidative stress than exposed to acidic or alkaline conditions. The histopathological analysis revealed lesions caused by TBBPA. This study provides valuable toxicological information of TBBPA and will facilitate a deeper understanding on its potential toxicity in realistic aquatic environments.
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Affiliation(s)
- Qun He
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China
| | - Xinghao Wang
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China
| | - Ping Sun
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China.
| | - Zunyao Wang
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China.
| | - Liansheng Wang
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China
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35
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Jeffries MKS, Stultz AE, Smith AW, Stephens DA, Rawlings JM, Belanger SE, Oris JT. The fish embryo toxicity test as a replacement for the larval growth and survival test: A comparison of test sensitivity and identification of alternative endpoints in zebrafish and fathead minnows. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2015; 34:1369-81. [PMID: 25929752 DOI: 10.1002/etc.2932] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Revised: 01/22/2015] [Accepted: 02/05/2015] [Indexed: 05/23/2023]
Abstract
The fish embryo toxicity (FET) test has been proposed as an alternative to the larval growth and survival (LGS) test. The objectives of the present study were to evaluate the sensitivity of the FET and LGS tests in fathead minnows (Pimephales promelas) and zebrafish (Danio rerio) and to determine if the inclusion of sublethal metrics as test endpoints could enhance test utility. In both species, LGS and FET tests were conducted using 2 simulated effluents. A comparison of median lethal concentrations determined via each test revealed significant differences between test types; however, it could not be determined which test was the least and/or most sensitive. At the conclusion of each test, developmental abnormalities and the expression of genes related to growth and toxicity were evaluated. Fathead minnows and zebrafish exposed to mock municipal wastewater-treatment plant effluent in a FET test experienced an increased incidence of pericardial edema and significant alterations in the expression of genes including insulin-like growth factors 1 and 2, heat shock protein 70, and cytochrome P4501A, suggesting that the inclusion of these endpoints could enhance test utility. The results not only show the utility of the fathead minnow FET test as a replacement for the LGS test but also provide evidence that inclusion of additional endpoints could improve the predictive power of the FET test.
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Affiliation(s)
- Marlo K Sellin Jeffries
- Department of Biology, Miami University, Oxford, Ohio, USA
- Department of Biology, Texas Christian University, Fort Worth, Texas, USA
| | - Amy E Stultz
- Department of Biology, Miami University, Oxford, Ohio, USA
| | - Austin W Smith
- Department of Biology, Miami University, Oxford, Ohio, USA
| | - Dane A Stephens
- Department of Biology, Texas Christian University, Fort Worth, Texas, USA
| | - Jane M Rawlings
- Global Product Stewardship, Environmental Stewardship and Sustainability, Procter & Gamble, Mason, Ohio, USA
| | - Scott E Belanger
- Global Product Stewardship, Environmental Stewardship and Sustainability, Procter & Gamble, Mason, Ohio, USA
| | - James T Oris
- Department of Biology, Miami University, Oxford, Ohio, USA
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Christen V, Fent K. Tissue-, sex- and development-specific transcription profiles of eight UDP-glucuronosyltransferase genes in zebrafish (Danio rerio) and their regulation by activator of aryl hydrocarbon receptor. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2014; 150:93-102. [PMID: 24667232 DOI: 10.1016/j.aquatox.2014.02.019] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2013] [Revised: 02/14/2014] [Accepted: 02/26/2014] [Indexed: 06/03/2023]
Abstract
UDP-Glucuronosyltransferases (Ugts) are phase II biotransformation enzymes that glucuronidate numerous endogenous and xenobiotic substrates. Based on the reported zebrafish Ugt gene repertoire, primers for the Ugt1a and Ugt1b family and for individual Ugt5a1, Ugt5a3, Ugt5a4, Ugt5a5, Ugt5c2 and Ugt5c3 were designed and applied in RT-qPCR analyses. Transcriptional expression profiles of these Ugts were analyzed in intestine, liver, gonad and brain of female and male adult zebrafish and at different embryonic developmental stages. We found tissue-, sex- and developmental-specific expression patterns for all isoforms. Throughout all tissues, the most abundant Ugts were Ugt1a, Ugt1b, Ugt5a1 and Ugt5a3. Expression during embryonic development was assessed between 24 and 120 hpf. Ugts showed a development-dependent expression. The pattern of Ugt1a, Ugt1b, Ugt5a1, Ugt5a3 and Ugt5a4 were similar with highest expression at 24 hpf followed by a decrease and rebound increase up to 120 hpf. To analyze for transcriptional regulation of Ugts by the arylhydrocarbon receptor (ahr2), zebrafish eleuthero-embryos were exposed to 5, 25 and 50μg/L benzo(a)pyrene (BaP), a model ahr2 regulator for cyp1a. Besides transcriptional induction of ahr2 and cyp1a, BaP produced a significant induction of Ugt1a, Ugt5a1, Ugt5a3 and Ugt5a5 as well as a down-regulation of Ugt1b. These data demonstrate the link between ahr2 signalling and transcriptional expression of Ugt genes. This is the first study showing transcriptional expression of eight different Ugts in tissues and during embryonic development and offers new perspectives on the involvement of Ugts in fish xenobiotic metabolism.
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Affiliation(s)
- Verena Christen
- University of Applied Sciences and Arts Northwestern Switzerland, School of Life Sciences, Gründenstrasse 40, CH-4132 Muttenz, Switzerland
| | - Karl Fent
- University of Applied Sciences and Arts Northwestern Switzerland, School of Life Sciences, Gründenstrasse 40, CH-4132 Muttenz, Switzerland; Swiss Federal Institute of Technology Zürich (ETH Zürich), Institute of Biogeochemistry and Pollution Dynamics, Environmental Systems Science, 8092 Zürich, Switzerland.
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James MO, Marth CJ, Rowland-Faux L. Slow O-demethylation of methyl triclosan to triclosan, which is rapidly glucuronidated and sulfonated in channel catfish liver and intestine. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2012; 124-125:72-82. [PMID: 22926334 DOI: 10.1016/j.aquatox.2012.07.009] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2012] [Revised: 07/24/2012] [Accepted: 07/24/2012] [Indexed: 06/01/2023]
Abstract
The antibacterial personal care product triclosan is discharged in municipal waste, and converted in part by bacteria in sewage sludge and soil to its more lipid-soluble methyl ether, methyl triclosan. Triclosan and methyl triclosan have been detected in water, sediment, fish and invertebrates near sewage treatment facilities. Understanding the biotransformation of methyl triclosan and triclosan in a model food fish, the channel catfish, will be of value in assessing the likelihood that these compounds will bioaccumulate in exposed fish, and therefore potentially pass up the food chain. We hypothesize that cytochrome P450 will catalyze the O-demethylation of methyl triclosan to yield triclosan, which is likely to undergo glucuronidation or sulfonation of the phenolic hydroxyl group. Conversion of methyl triclosan to triclosan was measured by LC/MS/MS following aerobic incubation of varying concentrations of methyl triclosan with NADPH and hepatic and intestinal microsomes from untreated, 3-methylcholanthrene-treated (10 mg/kg, i.p.) or PCB-126-treated (0.1 mg/kg, i.p.) channel catfish (n=4 per treatment group). The K(m) values for methyl triclosan were similar for untreated, 3-methylcholanthrene-treated and PCB-126-treated catfish liver microsomes, ranging from 80 to 250 μM. V(max) values for O-demethylation ranged from 30 to 150 pmol/min/mg protein, with no significant differences between controls, PCB-126-treated or 3-methylcholanthrene-treated fish, suggesting that methyl triclosan O-demethylation was not a CYP1-catalyzed reaction. Methyl triclosan O-demethylation activities in intestinal microsomes were similar to or lower than those found with liver microsomes. The calculated rate of O-demethylation of methyl triclosan in catfish liver at 1 μM, a concentration reported in exposed fish, and 21°C, an early summer water temperature, is 0.10 pmol/min/mg protein. This slow rate of metabolism suggests that upon continued exposure, methyl triclosan may bioaccumulate in the channel catfish. Triclosan itself, however, was readily glucuronidated by hepatic and intestinal microsomes and sulfonated by hepatic and intestinal cytosol. Triclosan glucuronidation followed Michaelis-Menten kinetics when rates were measured across a concentration range of 5-1000 μM, whereas triclosan sulfonation exhibited substrate inhibition at concentrations above 10-20 μM in both intestinal and hepatic cytosol. Based on the enzyme kinetic constants measured in hepatic and intestinal fractions at 21°C, triclosan at 1 μM could be glucuronidated at rates of 23 and 3.2 pmol/min/mg protein respectively in liver and intestine, and sulfonated at rates of 277 (liver) and 938 (intestine) pmol/min/mg protein. These rates are much higher than the rates of demethylation of methyl triclosan, and suggest that triclosan would be rapidly cleared and unlikely to bioaccumulate in catfish tissues.
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Affiliation(s)
- Margaret O James
- Department of Medicinal Chemistry, University of Florida, Gainesville, FL 32610-0485, United States.
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