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Jeremias G, Muñiz-González AB, Mendes Gonçalves FJ, Martínez-Guitarte JL, Asselman J, Luísa Pereira J. History of exposure to copper influences transgenerational gene expression responses in Daphnia magna. Epigenetics 2024; 19:2296275. [PMID: 38154067 PMCID: PMC10761054 DOI: 10.1080/15592294.2023.2296275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Accepted: 12/13/2023] [Indexed: 12/30/2023] Open
Abstract
The establishment of transgenerational effects following chemical exposure is a powerful phenomenon, capable of modulating ecosystem health beyond exposure periods. This study assessed the transgenerational effects occurring due to copper exposure in the invertebrate D. magna at the transcriptional level, while evaluating the role of exposure history on such responses. Thus, daphnids acclimated for several generations in a copper vs. clean medium were then exposed for one generation (F0) to this metal, and monitored for the following non-exposed generations (F1, F2 and F3). Organisms differing in exposure histories showed remarkably different transcriptional profiles at the F0, with naïve organisms being more profoundly affected. These trends were confirmed for F3 treatments, which presented different transcriptional patterns for genes involved in detoxification, oxidative stress, DNA damage repair, circadian clock functioning and epigenetic regulation. Furthermore, regardless of exposure history, a great number of histone modifier genes were always found transcriptionally altered, thus suggesting the involvement of histone modifications in the response of Daphnia to metal exposure. Lastly, remarkably distinct transgenerational transcriptional responses were found between naïve and non-naïve organisms, thereby highlighting the influence of exposure history on gene expression and confirming the capacity of metals to determine transgenerational transcriptional effects across non-exposed generations.
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Affiliation(s)
- Guilherme Jeremias
- CESAM - Centre for Environmental and Marine Studies & Department of Biology, University of Aveiro, Aveiro, Portugal
| | - Ana-Belén Muñiz-González
- CESAM - Centre for Environmental and Marine Studies & Department of Biology, University of Aveiro, Aveiro, Portugal
- Biology & Toxicology Group, Department of Mathematics, Physics, and Fluids, National Distance Education University (UNED), Madrid, Spain
| | | | - José-Luis Martínez-Guitarte
- Biology & Toxicology Group, Department of Mathematics, Physics, and Fluids, National Distance Education University (UNED), Madrid, Spain
| | - Jana Asselman
- Blue Growth Research Lab, Ghent University, Ostend, Belgium
| | - Joana Luísa Pereira
- CESAM - Centre for Environmental and Marine Studies & Department of Biology, University of Aveiro, Aveiro, Portugal
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2
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Wright GM, Black JC. Genomic Redistribution of Metal-Response Transcription Factor-1 (MTF-1) in Cadmium Resistant Cells. Cells 2023; 12:cells12060953. [PMID: 36980293 PMCID: PMC10047149 DOI: 10.3390/cells12060953] [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: 02/16/2023] [Revised: 03/16/2023] [Accepted: 03/17/2023] [Indexed: 03/30/2023] Open
Abstract
(1) Background: Metal homeostasis is an important part of cellular programs and is disrupted when cells are exposed to carcinogenic heavy metals. Metal response is mediated by the metal response element transcription factor MTF-1. However, where MTF-1 binds and how that binding changes in response to heavy metals, such as cadmium, remains unknown. (2) Methods: To investigate the effects of prolonged cadmium exposure on the genomic distribution of MTF-1, we performed MTF-1 CUT&RUN, RNA-seq and ATAC-seq on control and cadmium-resistant cells. (3) Results: Changes in MTF-1 binding primarily occur distal to the transcription start sight. Newly occupied MTF-1 sites are enriched for FOS/JUN DNA binding motifs, while regions that lose MTF-1 binding in cadmium are enriched for the FOX transcription factor family member DNA binding sites. (4) Conclusions: Relocalization of MTF-1 to new genomic loci does not alter the accessibility of these locations. Our results support a model whereby MTF-1 is relocalized to accessible FOS/JUN-bound genomic locations in response to cadmium.
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Affiliation(s)
- Gregory M Wright
- Department of Pharmacology, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Joshua C Black
- Department of Pharmacology, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
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3
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Reilly K, Ellis LJA, Davoudi HH, Supian S, Maia MT, Silva GH, Guo Z, Martinez DST, Lynch I. Daphnia as a model organism to probe biological responses to nanomaterials-from individual to population effects via adverse outcome pathways. FRONTIERS IN TOXICOLOGY 2023; 5:1178482. [PMID: 37124970 PMCID: PMC10140508 DOI: 10.3389/ftox.2023.1178482] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Accepted: 04/06/2023] [Indexed: 05/02/2023] Open
Abstract
The importance of the cladoceran Daphnia as a model organism for ecotoxicity testing has been well-established since the 1980s. Daphnia have been increasingly used in standardised testing of chemicals as they are well characterised and show sensitivity to pollutants, making them an essential indicator species for environmental stress. The mapping of the genomes of D. pulex in 2012 and D. magna in 2017 further consolidated their utility for ecotoxicity testing, including demonstrating the responsiveness of the Daphnia genome to environmental stressors. The short lifecycle and parthenogenetic reproduction make Daphnia useful for assessment of developmental toxicity and adaption to stress. The emergence of nanomaterials (NMs) and their safety assessment has introduced some challenges to the use of standard toxicity tests which were developed for soluble chemicals. NMs have enormous reactive surface areas resulting in dynamic interactions with dissolved organic carbon, proteins and other biomolecules in their surroundings leading to a myriad of physical, chemical, biological, and macromolecular transformations of the NMs and thus changes in their bioavailability to, and impacts on, daphnids. However, NM safety assessments are also driving innovations in our approaches to toxicity testing, for both chemicals and other emerging contaminants such as microplastics (MPs). These advances include establishing more realistic environmental exposures via medium composition tuning including pre-conditioning by the organisms to provide relevant biomolecules as background, development of microfluidics approaches to mimic environmental flow conditions typical in streams, utilisation of field daphnids cultured in the lab to assess adaption and impacts of pre-exposure to pollution gradients, and of course development of mechanistic insights to connect the first encounter with NMs or MPs to an adverse outcome, via the key events in an adverse outcome pathway. Insights into these developments are presented below to inspire further advances and utilisation of these important organisms as part of an overall environmental risk assessment of NMs and MPs impacts, including in mixture exposure scenarios.
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Affiliation(s)
- Katie Reilly
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Laura-Jayne A. Ellis
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Hossein Hayat Davoudi
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Suffeiya Supian
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Marcella T. Maia
- Brazilian Nanotechnology National Laboratory (LNNano), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, Brazil
| | - Gabriela H. Silva
- Brazilian Nanotechnology National Laboratory (LNNano), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, Brazil
| | - Zhiling Guo
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, United Kingdom
- *Correspondence: Zhiling Guo, ; Iseult Lynch,
| | - Diego Stéfani T. Martinez
- Brazilian Nanotechnology National Laboratory (LNNano), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, Brazil
| | - Iseult Lynch
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, United Kingdom
- *Correspondence: Zhiling Guo, ; Iseult Lynch,
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Jeremias G, Veloso T, Gonçalves FJM, Van Nieuwerburgh F, Pereira JL, Asselman J. Multigenerational DNA methylation responses to copper exposure in Daphnia: Potential targets for epigenetic biomarkers? CHEMOSPHERE 2022; 308:136231. [PMID: 36055596 DOI: 10.1016/j.chemosphere.2022.136231] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 08/23/2022] [Accepted: 08/24/2022] [Indexed: 06/15/2023]
Abstract
Epigenetic mechanisms are moving to the forefront of environmental sciences, as environmentally induced epigenetic changes shape biological responses to chemical contamination. This work focused on Daphnia as a representative of potentially threatened freshwater biota, aiming to gain an insight into the involvement of epigenetic mechanisms in their response and eventual adaptation to metal contamination. Copper-induced DNA methylation changes, their potential transgenerational inheritance, and life-history traits were assessed. Organisms with different histories of past exposure to copper were exposed to toxic levels of the element for one generation (F0) and then monitored for three subsequent unexposed generations (F1, F2, and F3). Overall, methylation changes targeted important genes for counteracting the effects of metals and oxidative stress, including dynein light chain, ribosomal kinase and nuclear fragile X mental retardation-interacting protein. Also, contrasting overall and gene-specific methylation responses were observed in organisms differing in their history of exposure to copper, with different transgenerational methylation responses being also identified among the two groups, without apparent life-history costs. Taken together, these results demonstrate the capacity of copper to promote epigenetic transgenerational inheritance in a manner related explicitly to history of exposure, thereby supporting the development and incorporation of epigenetic biomarkers in risk assessment frameworks.
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Affiliation(s)
- Guilherme Jeremias
- Department of Biology & CESAM - Centre for Environmental and Marine Studies, University of Aveiro, Portugal
| | - Telma Veloso
- Department of Biology & CESAM - Centre for Environmental and Marine Studies, University of Aveiro, Portugal; CICECO - Aveiro Institute of Materials & Department of Chemistry, University of Aveiro, Portugal
| | - Fernando J M Gonçalves
- Department of Biology & CESAM - Centre for Environmental and Marine Studies, University of Aveiro, Portugal
| | | | - Joana Luísa Pereira
- Department of Biology & CESAM - Centre for Environmental and Marine Studies, University of Aveiro, Portugal.
| | - Jana Asselman
- Blue Growth Research Lab, Ghent University, Bluebridge Building, Ostend Science Park 1, 8400, Ostend, Belgium
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5
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Paylar B, Asnake S, Sjöberg V, Ragnvaldsson D, Jass J, Olsson PE. Influence of water hardness on zinc toxicity in Daphnia magna. J Appl Toxicol 2022; 42:1510-1523. [PMID: 35285959 PMCID: PMC9543215 DOI: 10.1002/jat.4319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 03/07/2022] [Accepted: 03/07/2022] [Indexed: 11/17/2022]
Abstract
Zinc is an essential trace metal required for the maintenance of multiple physiological functions. Due to this, organisms can experience both zinc deficiency and toxicity. Hardness is recognized as one of the main modifying physiochemical factors regulating zinc bioavailability. Therefore, the present study analyzed the effect of hardness on zinc toxicity using Daphnia magna. Endpoint parameters were acute‐toxicity, development, reproduction, and expression data for genes involved in metal regulation and oxidative stress. In addition, the temporal expression profiles of genes during the initiation of reproduction and molting were investigated. Water hardness influenced the survival in response to exposures to zinc. A zinc concentration of 50 μg/l in soft water (50 mg CaCO3/L) caused 73% mortality after 96 h exposure, whereas the same zinc concentration in the hardest water did not cause any significant mortality. Moreover, increasing water hardness from 100 to 200 mg CaCO3/L resulted in a reduced number of offspring. Fecundity was higher at first brood for groups exposed to higher Zn concentrations. The survival data were used to assess the precision of the bioavailability models (Bio‐met) and the geochemical model (Visual MINTEQ). As the Bio‐met risk predictions overestimated the Zn toxicity, a competition‐based model to describe the effects of hardness on zinc toxicity is proposed. This approach can be used to minimize differences in setting environmental quality standards. Moreover, gene expression data showed that using the toxicogenomic approach was more sensitive than the physiological endpoints. Therefore, data presented in the study can be used to improve risk assessment for zinc toxicity. The present study analyzed the effect of hardness on zinc toxicity using Daphnia magna for acute‐toxicity, development, reproduction, and gene expression. Results showed that hardness plays an important role for Zn toxicity by effectively changing the bioavailability of Zn. The competition between Zn, Ca, and Mg can be used to normalize hardness effect on mortality. Bioavailability models used in risk assessment could be improved by considering water hardness.
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Affiliation(s)
- Berkay Paylar
- Biology, The Life Science Center, School of Science and Technology, Örebro University, Örebro, Sweden
| | - Solomon Asnake
- Biology, The Life Science Center, School of Science and Technology, Örebro University, Örebro, Sweden
| | - Viktor Sjöberg
- Chemistry, MTM, School of Science and Technology, Örebro University, Örebro, Sweden
| | | | - Jana Jass
- Biology, The Life Science Center, School of Science and Technology, Örebro University, Örebro, Sweden
| | - Per-Erik Olsson
- Biology, The Life Science Center, School of Science and Technology, Örebro University, Örebro, Sweden
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6
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Yiwen W, Xiaohan T, Chunfeng Z, Xiaoyu Y, Yaodong M, Huanhuan Q. Genetics of metallothioneins in Drosophilamelanogaster. CHEMOSPHERE 2022; 288:132562. [PMID: 34653491 DOI: 10.1016/j.chemosphere.2021.132562] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 10/08/2021] [Accepted: 10/11/2021] [Indexed: 06/13/2023]
Abstract
Metallothioneins (MTs) are ubiquitous metal-chelating proteins involved in cellular metal homeostasis. MTs were found to be related with almost all the biological processes and their malfunctioning is responsible for a lot of important human diseases. Invertebrate MTs were also used broadly as biomarkers of metal contamination due to their inducible expression by metal exposure. MT system plays a significant role in maintaining human health and ecological stability. Drosophila melanogaster, the vinegar fly, is a perfect model for studying insect MT systems. Six MTs were identified in D. melanogaster, and were designated MtnA to F. All the MTs are considered as Cu-thioneins except for MtnF, which is putatively a Zn-thionein. Expression of all the MTs are regulated by MTF-1/MRE system, thus being able to be induced by heavy metal exposure. The expression pattern and function of separated MTs are partially overlapped and partially distinct. In this work, we made a summary of all the studies on D. melanogaster MTs. From this review, we noted that, compared with studies on mammalian MTs, the understanding of the MT system of D. melanogaster and other invertebrates, especially the regulation mechanism for MT expression and protein-protein interaction with them, is still in a low level.
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Affiliation(s)
- Wang Yiwen
- School of Pharmaceutical Science and Technology, Tianjin University, 300072, Tianjin, China
| | - Tian Xiaohan
- School of Pharmaceutical Science and Technology, Tianjin University, 300072, Tianjin, China
| | - Zhu Chunfeng
- School of Life Sciences, Tianjin University, 300072, Tianjin, China
| | - Yu Xiaoyu
- School of Pharmaceutical Science and Technology, Tianjin University, 300072, Tianjin, China
| | - Miao Yaodong
- Second Affiliated Hospital of Tianjin University of Traditional Chinese Medicine, 300250, Tianjin, China
| | - Qiao Huanhuan
- Academy of Medical Engineering and Translational Medicine, Tianjin University, 300072, Tianjin, China.
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7
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Yu X, Tian X, Wang Y, Zhu C. Metal-metal interaction and metal toxicity: a comparison between mammalian and D. melanogaster. Xenobiotica 2021; 51:842-851. [PMID: 33929283 DOI: 10.1080/00498254.2021.1922781] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
1. Non-essential heavy metals such as mercury (Hg), arsenic (As), cadmium (Cd), and aluminium (Al) are useless to organisms and have shown extensive toxic effects. Previous studies show that two main molecular mechanisms of metal toxicity are oxidative stress and metal-metal interaction which can disrupt metal homeostasis.2. In this paper, we mainly illustrate metal toxicity and metal-metal interaction through examples in mammalians and D. melanogaster (fruit fly).3. We describe the interference of metal homeostasis by metal-metal interactions in three aspects including replacement, cellular transporter competition, and disruption of the regulation mechanism, and elaborate the mechanisms of metal toxicity to better deal with the challenges of heavy metal pollution and related health problems.
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Affiliation(s)
- Xiaoyu Yu
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, China
| | - Xianhan Tian
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, China
| | - Yiwen Wang
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, China
| | - Chunfeng Zhu
- School of Life Sciences, Tianjin University, Tianjin, China
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8
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Ellis LJA, Kissane S, Hoffman E, Valsami-Jones E, Brown JB, Colbourne JK, Lynch I. Multigenerational Exposure to Nano‐TiO
2
Induces Ageing as a Stress Response Mitigated by Environmental Interactions. ADVANCED NANOBIOMED RESEARCH 2021. [DOI: 10.1002/anbr.202000083] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Affiliation(s)
- Laura-Jayne A. Ellis
- School of Geography, Earth and Environmental Sciences University of Birmingham Birmingham B15 2TT UK
| | - Stephen Kissane
- Environmental Transcriptomics Facility School of Biosciences University of Birmingham Birmingham B15 2TT UK
| | - Elijah Hoffman
- Genome Dynamics Department Life Sciences Division Lawrence Berkeley National Laboratory 1 Cyclotron Road Berkeley CA 94720 USA
| | - Eugenia Valsami-Jones
- School of Geography, Earth and Environmental Sciences University of Birmingham Birmingham B15 2TT UK
| | - James B. Brown
- Environmental Transcriptomics Facility School of Biosciences University of Birmingham Birmingham B15 2TT UK
- Genome Dynamics Department Life Sciences Division Lawrence Berkeley National Laboratory 1 Cyclotron Road Berkeley CA 94720 USA
| | - John K. Colbourne
- Environmental Transcriptomics Facility School of Biosciences University of Birmingham Birmingham B15 2TT UK
| | - Iseult Lynch
- School of Geography, Earth and Environmental Sciences University of Birmingham Birmingham B15 2TT UK
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9
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Maternal Responses and Adaptive Changes to Environmental Stress via Chronic Nanomaterial Exposure: Differences in Inter and Transgenerational Interclonal Broods of Daphnia magna. Int J Mol Sci 2020; 22:ijms22010015. [PMID: 33374973 PMCID: PMC7792578 DOI: 10.3390/ijms22010015] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 12/15/2020] [Accepted: 12/16/2020] [Indexed: 02/07/2023] Open
Abstract
There is increasing recognition that environmental nano-biological interactions in model species, and the resulting effects on progeny, are of paramount importance for nanomaterial (NM) risk assessment. In this work, Daphnia magna F0 mothers were exposed to a range of silver and titanium dioxide NMs. The key biological life history traits (survival, growth and reproduction) of the F1 intergenerations, at the first (F1B1), third (F1B3) and fifth (F1B5) broods, were investigated. Furthermore, the F1 germlines of each of the three broods were investigated over 3 more generations (up to 25 days each) in continuous or removed-from NM exposure, to identify how the length of maternal exposure affects the resulting clonal broods. Our results show how daphnids respond to NM-induced stress, and how the maternal effects show trade-offs between growth, reproduction and survivorship. The F1B1 (and following germline) had the shortest F0 maternal exposure times to the NMs, and thus were the most sensitive showing reduced size and reproductive output. The F1B3 generation had a sub-chronic maternal exposure, whereas the F1B5 generation suffered chronic maternal exposure where (in most cases) the most compensatory adaptive effects were displayed in response to the prolonged NM exposure, including enhanced neonate output and reduced gene expression. Transgenerational responses of multiple germlines showed a direct link with maternal exposure time to 'sub-lethal' effect concentrations of NMs (identified from standard OECDs acute toxicity tests which chronically presented as lethal) including increased survival and production of males in the F1B3 and G1B5 germlines. This information may help to fine-tune environmental risk assessments of NMs and prediction of their impacts on environmental ecology.
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10
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Ellis LJA, Kissane S, Hoffman E, Brown JB, Valsami-Jones E, Colbourne J, Lynch I. Multigenerational Exposures of Daphnia Magna to Pristine and Aged Silver Nanoparticles: Epigenetic Changes and Phenotypical Ageing Related Effects. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e2000301. [PMID: 32338428 DOI: 10.1002/smll.202000301] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 02/24/2020] [Accepted: 02/25/2020] [Indexed: 06/11/2023]
Abstract
Engineered nanoparticles (NPs) undergo physical, chemical, and biological transformation after environmental release, resulting in different properties of the "aged" versus "pristine" forms. While many studies have investigated the ecotoxicological effects of silver (Ag) NPs, the majority focus on "pristine" Ag NPs in simple exposure media, rather than investigating realistic environmental exposure scenarios with transformed NPs. Here, the effects of "pristine" and "aged" Ag NPs are systematically evaluated with different surface coatings on Daphnia magna over four generations, comparing continuous exposure versus parental only exposure to assess recovery potential for three generations. Biological endpoints including survival, growth and reproduction and genetic effects associated with Ag NP exposure are investigated. Parental exposure to "pristine" Ag NPs has an inhibitory effect on reproduction, inducing expression of antioxidant stress related genes and reducing survival. Pristine Ag NPs also induce morphological changes including tail losses and lipid accumulation associated with aging phenotypes in the heart, abdomen, and abdominal claw. These effects are epigenetic remaining two generations post-maternal exposure (F2 and F3). Exposure to identical Ag NPs (same concentrations) aged for 6 months in environmentally realistic water containing natural organic matter shows considerably reduced toxicological effects in continuously exposed generations and to the recovery generations.
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Affiliation(s)
- Laura-Jayne A Ellis
- University of Birmingham, School of Geography, Earth and Environmental Sciences, Birmingham, B15 2TT, UK
| | - Stephen Kissane
- University of Birmingham, School of Biosciences, Birmingham, B15 2TT, UK
| | - Elijah Hoffman
- Lawrence Berkeley National Laboratory, Genome Dynamics Department, Life Sciences Division, 1 Cyclotron Road, Berkeley, CA, 94720, USA
| | - James B Brown
- University of Birmingham, School of Biosciences, Birmingham, B15 2TT, UK
- Lawrence Berkeley National Laboratory, Genome Dynamics Department, Life Sciences Division, 1 Cyclotron Road, Berkeley, CA, 94720, USA
| | - Eugenia Valsami-Jones
- University of Birmingham, School of Geography, Earth and Environmental Sciences, Birmingham, B15 2TT, UK
| | - John Colbourne
- University of Birmingham, School of Biosciences, Birmingham, B15 2TT, UK
| | - Iseult Lynch
- University of Birmingham, School of Geography, Earth and Environmental Sciences, Birmingham, B15 2TT, UK
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11
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Fong JC, De Guzman BE, Lamborg CH, Sison-Mangus MP. The Mercury-Tolerant Microbiota of the Zooplankton Daphnia Aids in Host Survival and Maintains Fecundity under Mercury Stress. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:14688-14699. [PMID: 31747751 DOI: 10.1021/acs.est.9b05305] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Many aquatic organisms can thrive in polluted environments by having the genetic capability to withstand suboptimal conditions. However, the contributions of microbiomes under these stressful environments are poorly understood. We investigated whether a mercury-tolerant microbiota can extend its phenotype to its host by ameliorating host survival and fecundity under mercury-stress. We isolated microbiota members from various clones of Daphnia magna, screened for the mercury-biotransforming merA gene, and determined their mercury tolerance levels. We then introduced the mercury-tolerant microbiota, Pseudomonas-10, to axenic D. magna and quantified its merA gene expression, mercury reduction capability, and measured its impact on host survival and fecundity. The expression of the merA gene was up-regulated in Pseudomonas-10, both in isolation and in host-association with mercury exposure. Pseudomonas-10 is also capable of significantly reducing mercury concentration in the medium. Notably, mercury-exposed daphnids containing only Pseudomonas-10 exhibited higher survival and fecundity than mercury-exposed daphnids supplemented with parental microbiome. Our study showed that zooplankton, such as Daphnia, naturally harbor microbiome members that are eco-responsive and tolerant to mercury exposure and can aid in host survival and maintain host fecundity in a mercury-contaminated environment. This study further demonstrates that under stressful environmental conditions, the fitness of the host can depend on the genotype and the phenotype of its microbiome.
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Affiliation(s)
- Jiunn C Fong
- Department of Ocean Sciences and Institute for Marine Sciences , University of California Santa Cruz , Santa Cruz , California 95064 , United States
| | - Brandon E De Guzman
- Department of Ocean Sciences and Institute for Marine Sciences , University of California Santa Cruz , Santa Cruz , California 95064 , United States
| | - Carl H Lamborg
- Department of Ocean Sciences and Institute for Marine Sciences , University of California Santa Cruz , Santa Cruz , California 95064 , United States
| | - Marilou P Sison-Mangus
- Department of Ocean Sciences and Institute for Marine Sciences , University of California Santa Cruz , Santa Cruz , California 95064 , United States
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12
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Chain FJJ, Finlayson S, Crease T, Cristescu M. Variation in transcriptional responses to copper exposure across Daphnia pulex lineages. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2019; 210:85-97. [PMID: 30836324 DOI: 10.1016/j.aquatox.2019.02.016] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Revised: 02/19/2019] [Accepted: 02/19/2019] [Indexed: 06/09/2023]
Abstract
Copper pollution is pervasive in aquatic habitats and is particularly harmful to invertebrates sensitive to environmental changes such as Daphnia pulex. Mechanisms of toxicity and tolerance to copper are not well understood. We used RNA-sequencing to investigate these mechanisms in three genetically distinct D. pulex clonal lineages with different histories of copper exposure. Upregulated genes after copper exposure were enriched with Gene Ontology (GO) categories involved in digestion, molting and growth, whereas downregulated genes after copper exposure were enriched in the metal-regulatory system, immune response and epigenetic modifications. The three D. pulex clones in our study show largely similar transcriptional patterns in response to copper, with only a total of twenty genes differentially expressed in a single clonal lineages. We also detected lower relative expression of some genes known to be important for copper tolerance, metallothionein and glutathione-S-transferase, in a sensitive lineage sampled from an uncontaminated habitat. Daphnia-specific genes (without orthologs outside the genus) and Daphnia-specific duplications (genes duplicated in the Daphnia lineage) were overrepresented in differentially expressed genes, highlighting an important role for newly emerged genes in tolerating environmental stressors. The results indicate that the D. pulex lineages tested in this study generally respond to copper stress using the same major pathways, but that the more resistant clone with previous copper exposure might be better able to regulate key genes. This finding highlights the important nuances in gene expression among clones, shaped by historical exposure and influencing copper tolerance.
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Affiliation(s)
- Frédéric J J Chain
- Department of Biology, McGill University, QC, H3A 1B1, Canada; Department of Biological Sciences, University of Massachusetts Lowell, MA, 01854, USA
| | - Sarah Finlayson
- Department of Biology, McGill University, QC, H3A 1B1, Canada
| | - Teresa Crease
- Department of Integrative Biology, University of Guelph, ON, N1G 2W1, Canada
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13
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Asselman J, Semmouri I, Jackson CE, Keith N, Van Nieuwerburgh F, Deforce D, Shaw JR, De Schamphelaere KAC. Genome-Wide Stress Responses to Copper and Arsenic in a Field Population of Daphnia. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:3850-3859. [PMID: 30817885 DOI: 10.1021/acs.est.8b06720] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Over the past decade, significant advances have been made to unravel molecular mechanisms of stress response in different ecotoxicological model species. Within this study, we focus on population level transcriptomic responses of a natural population of Daphnia magna Straus, (1820), to heavy metals. We aim to characterize the population level transcriptomic responses, which include standing genetic variation, and improve our understanding on how populations respond to environmental stress at a molecular level. We studied population level responses to two heavy metals, copper and arsenic, and their binary mixture across time. Transcriptomic patterns identified significantly regulated gene families and genes at the population level including cuticle proteins and resilins. Furthermore, some of these differentially regulated gene families, such as cuticle proteins, were also significantly enriched for genetic variations including SNPs and MNPs. In general, genetic variation was observed in specific gene families, many of which are known to be involved in stress response. Overall, our results indicate that molecular stress responses can be identified within natural populations and that linking molecular mechanisms with genetic variation at the population level could contribute significantly to adverse outcome frameworks.
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Affiliation(s)
- Jana Asselman
- Laboratory of Environmental Toxicology and Aquatic Ecology, Environmental Toxicology Unit - GhEnToxLab , Ghent University , Campus Coupure, Coupure Links 653, Building F, Second Floor , 9000 Gent , Belgium
| | - Ilias Semmouri
- Laboratory of Environmental Toxicology and Aquatic Ecology, Environmental Toxicology Unit - GhEnToxLab , Ghent University , Campus Coupure, Coupure Links 653, Building F, Second Floor , 9000 Gent , Belgium
| | - Craig E Jackson
- School of Public and Environmental Affairs , Indiana University , 1315 E 10th Sreett , Bloomington , Indiana 47405 , United States
| | - Nathan Keith
- School of Public and Environmental Affairs , Indiana University , 1315 E 10th Sreett , Bloomington , Indiana 47405 , United States
| | - Filip Van Nieuwerburgh
- Laboratory for Pharmaceutical Biotechnology, Faculty of Pharmaceutical Sciences , Ghent University , Campus UZ, Ottergemse Steenweg 460 , 9000 Ghent , Belgium
| | - Dieter Deforce
- Laboratory for Pharmaceutical Biotechnology, Faculty of Pharmaceutical Sciences , Ghent University , Campus UZ, Ottergemse Steenweg 460 , 9000 Ghent , Belgium
| | - Joseph R Shaw
- School of Public and Environmental Affairs , Indiana University , 1315 E 10th Sreett , Bloomington , Indiana 47405 , United States
- School of Biosciences , University of Birmingham , Birmingham B15 2TT , United Kingdom
| | - Karel A C De Schamphelaere
- Laboratory of Environmental Toxicology and Aquatic Ecology, Environmental Toxicology Unit - GhEnToxLab , Ghent University , Campus Coupure, Coupure Links 653, Building F, Second Floor , 9000 Gent , Belgium
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14
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Ečimović S, Velki M, Vuković R, Štolfa Čamagajevac I, Petek A, Bošnjaković R, Grgić M, Engelmann P, Bodó K, Filipović-Marijić V, Ivanković D, Erk M, Mijošek T, Lončarić Z. Acute toxicity of selenate and selenite and their impacts on oxidative status, efflux pump activity, cellular and genetic parameters in earthworm Eisenia andrei. CHEMOSPHERE 2018; 212:307-318. [PMID: 30145422 DOI: 10.1016/j.chemosphere.2018.08.095] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Revised: 08/17/2018] [Accepted: 08/18/2018] [Indexed: 06/08/2023]
Abstract
Selenium (Se) is an essential element for humans, animals, and certain lower plants, but can be toxic at high concentration. Even though Se is potentially toxic, little information is available about the effects of Se on soil animals. The aim of this study was to assess the impact of different concentrations of two Se forms, selenate and selenite, on earthworm Eisenia andrei. In order to obtain comprehensive overview on the Se effects, different parameters were measured. Namely, acute toxicity, apoptosis, efflux pump activity, different enzymatic and non-enzymatic biomarkers (acetylcholinesterase, carboxylesterase, glutathione S-transferase, catalase, glutathione reductase and superoxide dismutase activities, lipid peroxidation level and GSH/GSSG ratio) and expression of genes involved in oxidative and immune response have been investigated. Additionally, measurement of metallothioneins concentration and concentration of Se in exposed earthworms has been also performed. The assessment of acute toxicity showed a greater sensitivity of E. andrei to selenite exposure, whereas Se concentration measurements in earthworms showed higher accumulation of selenate form. Both Se forms caused inhibition of the efflux pump activity. Decrease in superoxide dismutase activity and increase in lipid peroxidation and glutathione reductase activity indicate that Se has a significant impact on the oxidative status of earthworms. Selenate exposure caused an apoptotic-like cell death in the coelomocytes of exposed earthworms, whereas decreased mRNA levels of stress-related genes and antimicrobial factors were observed upon the exposure to selenite. The obtained data give insight into the effects of two most common forms of Se in soil on the earthworm E. andrei.
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Affiliation(s)
- Sandra Ečimović
- Department of Biology, Josip Juraj Strossmayer University of Osijek, Cara Hadrijana 8/A, 31000 Osijek, Croatia.
| | - Mirna Velki
- Department of Biology, Josip Juraj Strossmayer University of Osijek, Cara Hadrijana 8/A, 31000 Osijek, Croatia.
| | - Rosemary Vuković
- Department of Biology, Josip Juraj Strossmayer University of Osijek, Cara Hadrijana 8/A, 31000 Osijek, Croatia.
| | - Ivna Štolfa Čamagajevac
- Department of Biology, Josip Juraj Strossmayer University of Osijek, Cara Hadrijana 8/A, 31000 Osijek, Croatia.
| | - Anja Petek
- Department of Biology, Josip Juraj Strossmayer University of Osijek, Cara Hadrijana 8/A, 31000 Osijek, Croatia.
| | - Rebeka Bošnjaković
- Department of Biology, Josip Juraj Strossmayer University of Osijek, Cara Hadrijana 8/A, 31000 Osijek, Croatia.
| | - Magdalena Grgić
- Department of Biology, Josip Juraj Strossmayer University of Osijek, Cara Hadrijana 8/A, 31000 Osijek, Croatia.
| | - Péter Engelmann
- Department of Immunology and Biotechnology, Clinical Center, Medical School, University of Pécs, Szigeti u. 12, Pécs H-7643, Hungary.
| | - Kornélia Bodó
- Department of Immunology and Biotechnology, Clinical Center, Medical School, University of Pécs, Szigeti u. 12, Pécs H-7643, Hungary.
| | - Vlatka Filipović-Marijić
- Laboratory for Biological Effects of Metals, Division for Marine and Environmental Research, Ruđer Bošković Institute, P.O. Box 180, 10002 Zagreb, Croatia.
| | - Dušica Ivanković
- Laboratory for Biological Effects of Metals, Division for Marine and Environmental Research, Ruđer Bošković Institute, P.O. Box 180, 10002 Zagreb, Croatia.
| | - Marijana Erk
- Laboratory for Biological Effects of Metals, Division for Marine and Environmental Research, Ruđer Bošković Institute, P.O. Box 180, 10002 Zagreb, Croatia.
| | - Tatjana Mijošek
- Laboratory for Biological Effects of Metals, Division for Marine and Environmental Research, Ruđer Bošković Institute, P.O. Box 180, 10002 Zagreb, Croatia.
| | - Zdenko Lončarić
- Faculty of Agriculture, Josip Juraj Strossmayer University of Osijek, Kralja Petra Svačića 1d, 31000 Osijek, Croatia.
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15
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Jeong TY, Asselman J, De Schamphelaere KAC, Van Nieuwerburgh F, Deforce D, Kim SD. Effect of β-adrenergic receptor agents on cardiac structure and function and whole-body gene expression in Daphnia magna. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2018; 241:869-878. [PMID: 29913414 DOI: 10.1016/j.envpol.2018.06.026] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Revised: 06/06/2018] [Accepted: 06/08/2018] [Indexed: 06/08/2023]
Abstract
Propranolol (PRO), a human β-AR (β-adrenergic receptor) antagonist, is considered to result in specific effects in a non-target species, D. magna, based on our previous studies. The present study investigated the effects of β-AR agents, including an antagonist and agonist using pharmacologically relevant endpoints as well as a more holistic gene expression approach to reveal the impacts and potential mode of actions (MOAs) in the model non-target species. Results show that the responses in cardiac endpoints and gene expression in D. magna are partially similar but distinguishable from the observations in different organisms. No effect was observed on heart size growth in PRO and isoprenaline (ISO) exposure. The contraction capacity of the heart was decreased in ISO exposure, and the heart rate was decreased in PRO exposure. Time-series exposures showed different magnitudes of effect on heart rate and gene expression dependent on the type of chemical exposure. Significant enrichment of gene families involved in protein metabolism and biotransformation was observed within the differentially expressed genes, and we also observed differential expression in juvenile hormone-inducible proteins in ISO and PRO exposure, which is suspected of having endocrine disruption potential. Taken together, deviation between the effects of PRO and ISO in D. magna and other organisms suggests dissimilarity in MOAs or attributes of target bio-molecules between species. Additionally, PRO and ISO may act as endocrine disruptors based on the gene expression observation. Results in the present study confirm that it is challenging to predict ecological impact of active pharmaceutical ingredients (APIs) based on the available data acquired through human-focused studies. Furthermore, the present study provided unique data and a case study on the impact of APIs in a non-target organism.
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Affiliation(s)
- Tae-Yong Jeong
- Department of Physical and Environmental Science, University of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario, M1C1A4, Canada; School of Earth Science and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), 123 Cheomdan-gwagiro, Buk-gu, Gwangju, 61005, South Korea
| | - Jana Asselman
- Laboratory of Environmental Toxicology and Aquatic Ecology, Ghent University, J. Plateaustraat 22, Β-9000 Ghent, Belgium
| | - Karel A C De Schamphelaere
- Laboratory of Environmental Toxicology and Aquatic Ecology, Ghent University, J. Plateaustraat 22, Β-9000 Ghent, Belgium
| | | | - Dieter Deforce
- Laboratory of Pharmaceutical Biotechnology, Ghent University, Ghent, Belgium
| | - Sang Don Kim
- School of Earth Science and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), 123 Cheomdan-gwagiro, Buk-gu, Gwangju, 61005, South Korea.
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16
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Wang X, Gao Q, Liu X, Wang XP, Lei C, Sayed WAA, Zhu F. Metallothionein in Hermetia illucens (Linnaeus, 1758) larvae (Diptera: Stratiomyidae), a potential biomarker for organic waste system. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:5379-5385. [PMID: 29209974 DOI: 10.1007/s11356-017-0856-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Accepted: 11/28/2017] [Indexed: 06/07/2023]
Abstract
Black soldier fly, Hermetia illucens (Linnaeus, 1758), is an important economic fly as its larvae can be used for recycling organic waste, such as food waste and manure. H. illucens larvae (BSFL) could uptake Cd from substrates and accumulate it inside bodies, which need to be monitored during waste treatment. Metallothionein (MT) usually serve as biomarker because of its role in metal homeostasis, detoxification, and dose response of heavy metals. Therefore, a MT gene was cloned from H. illucens (HIMT) that encoded 40 amino acids with typical cysteine rich features, which had a high sequence identity with other insect MTs. The expression of HIMT and total MT protein was measured in BSFL fed by meals spiked with gradient dose of Cd (0, 5, 50, 500 mg/kg) for 24, 48, 72, and 96 h, respectively. Dose-associated response of HIMT and total MT were found and the possible correlative range of Cd was from 5 to 50 mg/kg. The expression of HIMT might be a potential biomarker for monitoring Cd contamination by H. illucens in terrestrial organic matters, which might further apply in waste transformation system.
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Affiliation(s)
- Xiaoyun Wang
- Hubei International Scientific and Technological Cooperation Base of Waste Conversion by Insects, Huazhong Agricultural University, Wuhan, People's Republic of China
| | - Qiao Gao
- Hubei International Scientific and Technological Cooperation Base of Waste Conversion by Insects, Huazhong Agricultural University, Wuhan, People's Republic of China
| | - Xinhui Liu
- Hubei International Scientific and Technological Cooperation Base of Waste Conversion by Insects, Huazhong Agricultural University, Wuhan, People's Republic of China
| | - Xiao-Ping Wang
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, People's Republic of China
| | - Chaoliang Lei
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, People's Republic of China
| | - Waheed A A Sayed
- Biological Application Department, Nuclear Research Centre, Atomic Energy Authority, Cairo, Egypt
| | - Fen Zhu
- Hubei International Scientific and Technological Cooperation Base of Waste Conversion by Insects, Huazhong Agricultural University, Wuhan, People's Republic of China.
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, People's Republic of China.
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17
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Kim HY, Asselman J, Jeong TY, Yu S, De Schamphelaere KAC, Kim SD. Multigenerational Effects of the Antibiotic Tetracycline on Transcriptional Responses of Daphnia magna and Its Relationship to Higher Levels of Biological Organizations. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:12898-12907. [PMID: 29023098 DOI: 10.1021/acs.est.7b05050] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Given the risk of environmental pollution by pharmaceutical compounds and the effects of these compounds on exposed ecosystems, ecologically relevant and realistic assessments are required. However, many studies have been mostly focused on individual responses in a single generation exposed to one-effect concentrations. Here, transcriptional responses of the crustacean Daphnia magna to the antibiotic tetracycline across multiple generations and effect concentrations were investigated. The results demonstrated that tetracycline induced different transcriptional responses of daphnids that were dependent on dose and generation. For example, reproduction-related expressed sequence tags (ESTs), including vitellogenin, were distinctly related to the dose-dependent tetracycline exposure, whereas multigenerational exposure induced significant change of molting-related ESTs such as cuticle protein. A total of 65 ESTs were shared in all contrasts, suggesting a conserved mechanism of tetracycline toxicity regardless of exposure concentration or time. Most of them were associated with general stress responses including translation, protein and carbohydrate metabolism, and oxidative phosphorylation. In addition, effects across the dose-response curve showed higher correlative connections among transcriptional, physiological, and individual responses than multigenerational effects. In the multigenerational exposure, the connectivity between adjacent generations decreased with increasing generation number. The results clearly highlight that exposure concentration and time trigger different mechanisms and functions, providing further evidence that multigenerational and dose-response effects cannot be neglected in environmental risk assessment.
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Affiliation(s)
- Hyun Young Kim
- Research and Development Division, Korea Institute of Nuclear Nonproliferation and Control (KINAC) , 1534 Yuseong-daero, Yuseong-gu, Daejeon, 34054 Republic of Korea
| | - Jana Asselman
- Laboratory of Environmental Toxicology and Aquatic Ecology (GhEnToxLab), Ghent University , Ghent, B-9000 Belgium
| | - Tae-Yong Jeong
- School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology (GIST) , 123 Cheomdan-gwagiro, Buk-gu, Gwangju, 61005 Republic of Korea
| | - Seungho Yu
- Radiation Research Division for Industry and Environment, Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute , Jeongeup-Si, Jeollabuk-Do, 56212 Republic of Korea
| | - Karel A C De Schamphelaere
- Laboratory of Environmental Toxicology and Aquatic Ecology (GhEnToxLab), Ghent University , Ghent, B-9000 Belgium
| | - Sang Don Kim
- School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology (GIST) , 123 Cheomdan-gwagiro, Buk-gu, Gwangju, 61005 Republic of Korea
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18
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Effects of fluctuating temperature and food availability on reproduction and lifespan. Exp Gerontol 2016; 86:62-72. [PMID: 27364192 DOI: 10.1016/j.exger.2016.06.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Revised: 06/15/2016] [Accepted: 06/21/2016] [Indexed: 01/20/2023]
Abstract
Experimental studies on energetics and aging often remove two major factors that in part regulate the energy budget in a normal healthy individual: reproduction and fluctuating environmental conditions that challenge homeostasis. Here we use the cyclical parthenogenetic Daphnia pulex to evaluate the role of a fluctuating thermal environment on both reproduction and lifespan across six food concentrations. We test the hypotheses that (1) caloric restriction extends lifespan; (2) maximal reproduction will come with a cost of shortened lifespan; and (3) at a given food concentration, relative to a metabolically equivalent constant temperature environment a diel fluctuating thermal environment will alter the allocation of energy to reproduction and lifespan to maintain homeostasis. We did not identify a level of food concentration that extended lifespan in response to caloric restriction, and we found no cost of reproduction in terms of lifespan. Rather, the individuals at the highest food levels generally had the highest reproductive output and the longest lifespans, the individuals at the intermediate food level decreased reproduction and maintained lifespan, and the individuals at the three lower food concentrations had a decrease in reproduction and lifespan as would be predicted with increasing levels of starvation. Fluctuating temperature had no effect on lifespan at any food concentration, but delayed time to reproductive maturity and decreased early reproductive output at all food concentrations. This suggests that a fluctuating temperature regimen activates molecular pathways that alter energy allocation. The costs of fluctuating temperature on reproduction were not consistent across the lifespan. Statistical interactions for age of peak reproduction and lifetime fecundity suggest that senescence of the reproductive system may vary between temperature regimens at the different food concentrations.
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19
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Hudson SL, Doke DA, Gohlke JM. The effect of a low iron diet and early life methylmercury exposure in Daphnia pulex. Food Chem Toxicol 2016; 89:112-9. [PMID: 26806633 DOI: 10.1016/j.fct.2016.01.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2015] [Revised: 12/04/2015] [Accepted: 01/20/2016] [Indexed: 11/30/2022]
Abstract
Iron (Fe) deficiency increases risk for adverse health outcomes in humans; however little is known about the potential interaction with methylmercury (MeHg) exposure. Studies testing multiple stressor hypotheses are expensive and time consuming in mammalian model systems; therefore, determining relevance of alternative models is important. Daphnia pulex were fed standard or low-Fe diets of freshwater algae, Ankistrodesmus falcatus. MeHgCl (1600 ng/L) or vehicle was added to culture media for 24 h during early life, and the combinatorial effects of a low-Fe diet and MeHg exposure on lifespan, maturation time, and reproduction were evaluated. Lipid storage effects were measured using image analysis of Oil Red O staining and triacylglyceride quantification. Our results show a dose-dependent reduction in lifespan in D. pulex fed low Fe diets. Lipid analysis suggests an interactive effect of diet and MeHg exposure, with MeHg exposure increasing lipid storage in D. pulex fed a low-Fe diet. These findings suggest the effects of dietary iron intake and early life MeHg exposure in D. pulex may be mediated by changes in energetics that result in differential lipid storage. Therefore, lipid storage in D. pulex may be a useful screen for detecting long-term effects of multiple stressors early in life.
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Affiliation(s)
- Sherri L Hudson
- Department of Environmental Health Sciences, School of Public Health, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Dzigbodi A Doke
- Department of Environment and Resource Studies, University for Development Studies, Wa, Ghana
| | - Julia M Gohlke
- Department of Environmental Health Sciences, School of Public Health, University of Alabama at Birmingham, Birmingham, AL 35294, USA; Department of Population Health Sciences, Virginia Tech, Blacksburg, VA 24061, USA.
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20
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Rivetti C, Campos B, Faria M, De Castro Català N, Malik A, Muñoz I, Tauler R, Soares AMVM, Osorio V, Pérez S, Gorga M, Petrovic M, Mastroianni N, de Alda ML, Masiá A, Campo J, Picó Y, Guasc H, Barceló D, Barata C. Transcriptomic, biochemical and individual markers in transplanted Daphnia magna to characterize impacts in the field. THE SCIENCE OF THE TOTAL ENVIRONMENT 2015; 503-504:200-212. [PMID: 25005238 DOI: 10.1016/j.scitotenv.2014.06.057] [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: 04/02/2014] [Revised: 06/13/2014] [Accepted: 06/13/2014] [Indexed: 06/03/2023]
Abstract
Daphnia magna individuals were transplanted across 12 sites from three Spanish river basins (Llobregat, Ebro, Jucar) showing different sources of pollution. Gene transcription, feeding and biochemical responses in the field were assessed and compared with those obtained in re-constituted water treatments spiked with organic eluates obtained from water samples collected at the same locations and sampling periods. Up to 166 trace contaminants were detected in water and classified by their mode of action into 45 groups that included metals, pharmaceuticals, pesticides, illicit drugs, and other industrial compounds. Physicochemical water parameters differentiated the three river basins with Llobregat having the highest levels of conductivity, metals and pharmaceuticals, followed by Ebro, whereas the Jucar river had the greatest levels of illicit drugs. D. magna grazing rates and cholinesterase activity responded similarly than the diversity of riparian benthic communities. Transcription patterns of 13 different genes encoding for general stress, metabolism and energy processes, molting and xenobiotic transporters corroborate phenotypic responses differentiated sites within and across river basins. Principal Component Analysis and Partial Least Square Projections to Latent Structures regression analyses indicated that measured in situ responses of most genes and biomarkers and that of benthic macroinvertebrate diversity indexes were affected by distinct environmental factors. Conductivity, suspended solids and fungicides were negatively related with the diversity of macroinvertebrates cholinesterase, and feeding responses. Gene transcripts of heat shock protein and metallothionein were positively related with 11 classes of organic contaminants and 6 metals. Gene transcripts related with signaling paths of molting and reproduction, sugar, protein and xenobiotic metabolism responded similarly in field and lab exposures and were related with high residue concentrations of analgesics, diuretics, psychiatric drugs, β blockers, illicit drugs, trizoles, bisphenol A, caffeine and pesticides. These results indicate that application of omic technologies in the field is a promising subject in water management.
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Affiliation(s)
- Claudia Rivetti
- Department of Environmental Chemistry, IDAEA-CSIC, Jordi Girona 18, 08034 Barcelona, Spain
| | - Bruno Campos
- Department of Environmental Chemistry, IDAEA-CSIC, Jordi Girona 18, 08034 Barcelona, Spain
| | - Melissa Faria
- CESAM, Departamento de Biologia, Universidade de Aveiro, 3810-193 Aveiro, Portugal
| | - Nuria De Castro Català
- Department of Ecology, Universitat de Barcelona, Av. Diagonal 643, 08028 Barcelona, Spain
| | - Amrita Malik
- Department of Environmental Chemistry, IDAEA-CSIC, Jordi Girona 18, 08034 Barcelona, Spain
| | - Isabel Muñoz
- Department of Ecology, Universitat de Barcelona, Av. Diagonal 643, 08028 Barcelona, Spain
| | - Romà Tauler
- Department of Environmental Chemistry, IDAEA-CSIC, Jordi Girona 18, 08034 Barcelona, Spain
| | - Amadeu M V M Soares
- CESAM, Departamento de Biologia, Universidade de Aveiro, 3810-193 Aveiro, Portugal
| | - Victoria Osorio
- Department of Environmental Chemistry, IDAEA-CSIC, Jordi Girona 18, 08034 Barcelona, Spain
| | - Sandra Pérez
- Department of Environmental Chemistry, IDAEA-CSIC, Jordi Girona 18, 08034 Barcelona, Spain
| | - Marina Gorga
- Catalan Institute of Water Research, ICRA, C/Emili Grahit, 101, Edifici H2O, Parc Científic i Tecnològic de la Universitat de Girona, E-17003 Girona, Spain
| | - Mira Petrovic
- Catalan Institute of Water Research, ICRA, C/Emili Grahit, 101, Edifici H2O, Parc Científic i Tecnològic de la Universitat de Girona, E-17003 Girona, Spain; ICREA, Catalan Institution for Research and Advanced Studies, Barcelona, Spain
| | - Nicola Mastroianni
- Department of Environmental Chemistry, IDAEA-CSIC, Jordi Girona 18, 08034 Barcelona, Spain
| | - Miren López de Alda
- Department of Environmental Chemistry, IDAEA-CSIC, Jordi Girona 18, 08034 Barcelona, Spain
| | - Ana Masiá
- Food and Environmental Safety Research Group (SAMA-UV), Faculty of Pharmacy, University of Valencia, Av. Vicent Andrés Estellés s/n., 46100 Burjassot, València, Spain
| | - Julian Campo
- Food and Environmental Safety Research Group (SAMA-UV), Faculty of Pharmacy, University of Valencia, Av. Vicent Andrés Estellés s/n., 46100 Burjassot, València, Spain
| | - Yolanda Picó
- Food and Environmental Safety Research Group (SAMA-UV), Faculty of Pharmacy, University of Valencia, Av. Vicent Andrés Estellés s/n., 46100 Burjassot, València, Spain
| | - Helena Guasc
- Food and Environmental Safety Research Group (SAMA-UV), Faculty of Pharmacy, University of Valencia, Av. Vicent Andrés Estellés s/n., 46100 Burjassot, València, Spain; University of Girona, Campus Montilivi, 17071 Girona, Spain
| | - Damià Barceló
- Department of Environmental Chemistry, IDAEA-CSIC, Jordi Girona 18, 08034 Barcelona, Spain
| | - Carlos Barata
- Department of Environmental Chemistry, IDAEA-CSIC, Jordi Girona 18, 08034 Barcelona, Spain.
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Doke DA, Hudson SL, Dawson JA, Gohlke JM. Effects of early life exposure to methylmercury in Daphnia pulex on standard and reduced food ration. Reprod Toxicol 2014; 49:219-25. [PMID: 25263226 DOI: 10.1016/j.reprotox.2014.09.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2014] [Revised: 08/08/2014] [Accepted: 09/16/2014] [Indexed: 01/14/2023]
Abstract
As a well-known eco-toxicological model organism, Daphnia pulex may also offer advantages in human health research for assessing long-term effects of early life exposures to coupled stressors. Here, we examine consequences of early life exposure to methylmercury (MeHg) under standard and reduced food ration. We exposed Daphnia for 24h in early life to varying concentrations of methylmercury(II) chloride (0, 200, 400, 800 and 1600ng/L) and thereafter kept Daphnia on either a standard or a reduced food ration. The data suggests an additive effect of MeHg concentration and food ration on decreasing lifespan, although MeHg concentration does not affect survival linearly. Food ration and MeHg concentration were predictive of reduced reproduction, and there is some evidence of an interaction (p=0.048). Multi-stressor work in alternative model systems may be useful for prioritizing research, taking into account potential antagonistic, additive or synergistic effects that nutritional status may have on chemical toxicity.
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Affiliation(s)
- Dzigbodi A Doke
- Department of Environmental Health Sciences, School of Public Health, University of Alabama at Birmingham (UAB), Birmingham, AL 35294, USA
| | - Sherri L Hudson
- Department of Environmental Health Sciences, School of Public Health, University of Alabama at Birmingham (UAB), Birmingham, AL 35294, USA
| | - John A Dawson
- Department of Biostatistics, School of Public Health, University of Alabama at Birmingham (UAB), Birmingham, AL 35294, USA
| | - Julia M Gohlke
- Department of Environmental Health Sciences, School of Public Health, University of Alabama at Birmingham (UAB), Birmingham, AL 35294, USA.
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Isani G, Carpenè E. Metallothioneins, unconventional proteins from unconventional animals: a long journey from nematodes to mammals. Biomolecules 2014; 4:435-57. [PMID: 24970224 PMCID: PMC4101491 DOI: 10.3390/biom4020435] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2014] [Revised: 03/19/2014] [Accepted: 03/21/2014] [Indexed: 12/19/2022] Open
Abstract
Metallothioneins (MTs) are ubiquitous low molecular weight cysteine-rich proteins characterized by high affinity for d10 electron configuration metals, including essential (Zn and Cu) and non-essential (Cd and Hg) trace elements. The biological role of these ancient and well-conserved multifunctional proteins has been debated since MTs were first discovered in 1957. Their main hypothesized functions are: (1) homeostasis of Zn and Cu; (2) detoxification of Cd, and Hg; and (3) free radical scavenging. This review will focus on MTs in unconventional animals, those not traditionally studied in veterinary medicine but of increasing interest in this field of research. Living in different environments, these animals represent an incredible source of physiological and biochemical adaptations still partly unexplored. The study of metal-MT interactions is of great interest for clinicians and researchers working in veterinary medicine, food quality and endangered species conservation.
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Affiliation(s)
- Gloria Isani
- Department of Veterinary Medical Sciences, Alma Mater Studiorum-University of Bologna, via Tolara di sopra, 50, Ozzano Emilia, Bologna 40064, Italy.
| | - Emilio Carpenè
- Department of Veterinary Medical Sciences, Alma Mater Studiorum-University of Bologna, via Tolara di sopra, 50, Ozzano Emilia, Bologna 40064, Italy.
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23
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De Coninck DIM, Asselman J, Glaholt S, Janssen C, Colbourne JK, Shaw JR, De
Schamphelaere KAC. Genome-wide transcription profiles reveal genotype-dependent responses of biological pathways and gene-families in Daphnia exposed to single and mixed stressors. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2014; 48:3513-22. [PMID: 24552364 PMCID: PMC3983318 DOI: 10.1021/es4053363] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2013] [Revised: 02/17/2014] [Accepted: 02/19/2014] [Indexed: 05/04/2023]
Abstract
The present study investigated the possibilities and limitations of implementing a genome-wide transcription-based approach that takes into account genetic and environmental variation to better understand the response of natural populations to stressors. When exposing two different Daphnia pulex genotypes (a cadmium-sensitive and a cadmium-tolerant one) to cadmium, the toxic cyanobacteria Microcystis aeruginosa, and their mixture, we found that observations at the transcriptomic level do not always explain observations at a higher level (growth, reproduction). For example, although cadmium elicited an adverse effect at the organismal level, almost no genes were differentially expressed after cadmium exposure. In addition, we identified oxidative stress and polyunsaturated fatty acid metabolism-related pathways, as well as trypsin and neurexin IV gene-families as candidates for the underlying causes of genotypic differences in tolerance to Microcystis. Furthermore, the whole-genome transcriptomic data of a stressor mixture allowed a better understanding of mixture responses by evaluating interactions between two stressors at the gene-expression level against the independent action baseline model. This approach has indicated that ubiquinone pathway and the MAPK serine-threonine protein kinase and collagens gene-families were enriched with genes showing an interactive effect in expression response to exposure to the mixture of the stressors, while transcription and translation-related pathways and gene-families were mostly related with genotypic differences in interactive responses to this mixture. Collectively, our results indicate that the methods we employed may improve further characterization of the possibilities and limitations of transcriptomics approaches in the adverse outcome pathway framework and in predictions of multistressor effects on natural populations.
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Affiliation(s)
| | - Jana Asselman
- Laboratory
of Environmental Toxicology and Aquatic Ecology, Ghent University, Gent, Belgium
| | - Stephen Glaholt
- School
of Public & Environmental Affairs, Indiana
University, Bloomington, IN, United States
| | - Colin
R. Janssen
- Laboratory
of Environmental Toxicology and Aquatic Ecology, Ghent University, Gent, Belgium
| | - John K. Colbourne
- Center
for Genomics and Bioinformatics, Indiana
University, Bloomington, IN, United States
- School
of Biosciences, University of Birmingham, Edgebaston, Birmingham, United Kingdom
| | - Joseph R. Shaw
- School
of Public & Environmental Affairs, Indiana
University, Bloomington, IN, United States
- Center
for Genomics and Bioinformatics, Indiana
University, Bloomington, IN, United States
- School
of Biosciences, University of Birmingham, Edgebaston, Birmingham, United Kingdom
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24
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Blickley TM, Matson CW, Vreeland WN, Rittschof D, Di Giulio RT, McClellan-Green PD. Dietary CdSe/ZnS quantum dot exposure in estuarine fish: bioavailability, oxidative stress responses, reproduction, and maternal transfer. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2014; 148:27-39. [PMID: 24440963 DOI: 10.1016/j.aquatox.2013.12.021] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2013] [Revised: 12/18/2013] [Accepted: 12/22/2013] [Indexed: 06/03/2023]
Abstract
Continued development, use, and disposal of quantum dots (QDs) ensure their entrance into aquatic environments where they could pose a risk to biological organisms as whole nanoparticles or as degraded metal constituents. Reproductive Fundulus heteroclitus were fed a control diet with lecithin, diets containing 1 or 10 μg of lecithin-encapsulated CdSe/ZnS QD/day, or a diet containing 5.9 μg CdCl2/day for 85 days. Cadmium concentrations in liver, intestine, and eggs were quantified with inductively coupled plasma mass spectrometry. In fish fed 10 μg QD/day, QDs or their degradation products traversed the intestinal epithelia and accumulated in the liver. Less than 0.01% of the QD's cadmium was retained in the liver or intestinal tissues. This compares to 0.9% and 0.5% of the cadmium in the intestine and liver, respectively of fish fed a CdCl2 diet. Cadmium was also detected in the eggs from parents fed 10 μg QD/day. No significant changes in hepatic total glutathione, lipid peroxidation, or expression of genes involved in metal metabolism or oxidative stress were observed. While QDs in the diet are minimally bioavailable, unusual levels of vitellogenin transcription in male fish as well as declining fecundity require further investigation to determine if endocrine disruption is of environmental concern.
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Affiliation(s)
- T Michelle Blickley
- Marine Science and Conservation, Duke University Marine Laboratory, Beaufort, NC, United States; Integrated Toxicology & Environmental Health Program, Duke University, Durham, NC, United States.
| | - Cole W Matson
- Integrated Toxicology & Environmental Health Program, Duke University, Durham, NC, United States; Center for the Environmental Implications of NanoTechnology (CEINT), Duke University, Durham, NC, United States.
| | - Wyatt N Vreeland
- Biochemical Science Div., National Institute of Standards & Technology, Gaithersburg, MD, United States.
| | - Daniel Rittschof
- Marine Science and Conservation, Duke University Marine Laboratory, Beaufort, NC, United States; Integrated Toxicology & Environmental Health Program, Duke University, Durham, NC, United States.
| | - Richard T Di Giulio
- Integrated Toxicology & Environmental Health Program, Duke University, Durham, NC, United States; Center for the Environmental Implications of NanoTechnology (CEINT), Duke University, Durham, NC, United States.
| | - Patricia D McClellan-Green
- Dept. of Environmental & Molecular Toxicology, North Carolina State University, Raleigh, NC, United States; Center for Marine Sciences & Technology, North Carolina State University, Morehead City, NC, United States.
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