1
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Spears BM, Harpham Q, Brown E, Barnett CL, Barwell L, Collell MR, Davison M, Dixon H, Elliott JA, Garbutt A, Hazlewood C, Hofmann B, Lanyon J, Lofts S, MacKechnie C, Medinets S, Noble J, Ramsbottom D, Redhead JW, Riera A, Spurgeon DJ, Svendsen C, Taylor P, Thackeray SJ, Turvey K, Wood MD. A rapid environmental risk assessment of the Kakhovka Dam breach during the Ukraine conflict. Nat Ecol Evol 2024; 8:834-836. [PMID: 38499872 DOI: 10.1038/s41559-024-02373-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/20/2024]
Affiliation(s)
| | | | | | - Catherine L Barnett
- UK Centre for Ecology & Hydrology, Lancaster Environment Centre, Lancaster, UK
| | | | | | | | - Harry Dixon
- UK Centre for Ecology & Hydrology, Wallingford, UK
| | - J Alex Elliott
- UK Centre for Ecology & Hydrology, Lancaster Environment Centre, Lancaster, UK
| | - Angus Garbutt
- UK Centre for Ecology & Hydrology, Environment Centre Wales, Bangor, UK
| | | | | | | | - Stephen Lofts
- UK Centre for Ecology & Hydrology, Lancaster Environment Centre, Lancaster, UK
| | | | - Sergiy Medinets
- UK Centre for Ecology & Hydrology, Penicuik, UK
- Odesa National I.I. Mechnikov University, Odesa, Ukraine
| | | | | | | | | | | | - Claus Svendsen
- UK Centre for Ecology & Hydrology, Lancaster Environment Centre, Lancaster, UK
| | | | - Stephen J Thackeray
- UK Centre for Ecology & Hydrology, Lancaster Environment Centre, Lancaster, UK
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2
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Peters A, Beking M, Oste L, Hamer M, Vuaille J, Harford AJ, Backhaus T, Lofts S, Svendsen C, Peck C. Assessing the relevance of environmental exposure data sets. Integr Environ Assess Manag 2023. [PMID: 38099403 DOI: 10.1002/ieam.4881] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 11/16/2023] [Accepted: 12/01/2023] [Indexed: 02/17/2024]
Abstract
Environmental exposure data are used by decision-makers to assess environmental risks and implement actions to mitigate risks from contaminants. The first article in this series summarized the available evaluation schemes for environmental exposure data, of which there are few compared to those available for environmental hazard data. The second article covered the assessment of the reliability of environmental exposure data sets under the Criteria for the Reporting and Evaluation of Exposure Data (CREED). The aim of this article is to provide an overview and practical guidance on the relevance assessment in the context of the CREED approach for evaluating exposure monitoring data sets. Systematically considering relevance is critical for both evaluating existing data sets and for optimizing the design of new monitoring studies. Relevance is defined here as the degree of suitability or appropriateness of a data set to address a specific purpose or to answer the questions that have been defined by the assessor or for those generating exposure data. The purpose definition will be the foundation for the relevance assessment, to clarify how the assessor should rate the assessment criteria (fully met, partly met, not met/inappropriate, not reported, not applicable). This will provide transparency for anyone reviewing the outcomes. An explicit gap analysis (i.e., an articulation of the data set limitations for the stated purpose) is an important outcome of the relevance assessment. The relevance evaluation approach is demonstrated with three case studies, all relating to the freshwater aquatic environment, where the data sets are scored as relevant with or without restrictions, not relevant, or not assignable. The case studies represent both organic and inorganic constituents, and have different data characteristics (e.g., percentage of censored data, sampling frequencies, relation to supporting parameters). Integr Environ Assess Manag 2024;00:1-15. © 2023 SETAC.
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Affiliation(s)
- Adam Peters
- wca, Brunel House, Volunteer Way, Faringdon, Oxfordshire, UK
| | - Michael Beking
- Environment and Climate Change Canada, Gatineau, Quebec, Canada
| | | | - Mick Hamer
- Syngenta, Jealott's Hill International Research Station, Berkshire, UK
| | | | - Andrew J Harford
- Department of Climate Change, Energy, The Environment and Water, Supervising Scientist Branch, Darwin, Australia
| | - Thomas Backhaus
- Institute for Environmental Research, RWTH Aachen University, Aachen, Germany
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3
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Silva PV, Silva ARR, Clark NJ, Vassallo J, Baccaro M, Medvešček N, Grgić M, Ferreira A, Busquets-Fité M, Jurkschat K, Papadiamantis AG, Puntes V, Lynch I, Svendsen C, van den Brink NW, Handy RD, van Gestel CAM, Loureiro S. Toxicokinetics and bioaccumulation of silver sulfide nanoparticles in benthic invertebrates in an indoor stream mesocosm. Sci Total Environ 2023; 873:162160. [PMID: 36775152 DOI: 10.1016/j.scitotenv.2023.162160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 02/06/2023] [Accepted: 02/06/2023] [Indexed: 06/18/2023]
Abstract
Mesocosms allow the simulation of environmentally relevant conditions and can be used to establish more realistic scenarios of organism exposure to nanoparticles. An indoor mesocosm experiment simulating an aquatic stream ecosystem was conducted to assess the toxicokinetics and bioaccumulation of silver sulfide nanoparticles (Ag2S NPs) and AgNO3 in the freshwater invertebrates Girardia tigrina, Physa acuta and Chironomus riparius, and determine if previous single-species tests can predict bioaccumulation in the mesocosm. Water was daily spiked at 10 μg Ag L-1. Ag concentrations in water and sediment reached values of 13.4 μg Ag L-1 and 0.30 μg Ag g-1 in the Ag2S NP exposure, and 12.8 μg Ag L-1 and 0.20 μg Ag g-1 in the AgNO3. Silver was bioaccumulated by the species from both treatments, but with approximately 1.5, 3 and 11 times higher body Ag concentrations in AgNO3 compared to Ag2S NP exposures in snails, chironomids and planarians, respectively. In the Ag2S NP exposures, the observed uptake was probably of the particulate form. This demonstrates that this more environmentally relevant Ag nanoform may be bioavailable for uptake by benthic organisms. Interspecies interactions likely occurred, namely predation (planarians fed on chironomids and snails), which somehow influenced Ag uptake/bioaccumulation, possibly by altering organisms´ foraging behaviour. Higher Ag uptake rate constants were determined for AgNO3 (0.64, 80.4 and 1.12 Lwater g-1organism day-1) than for Ag2S NPs (0.05, 2.65 and 0.32 Lwater g-1organism day-1) for planarians, snails and chironomids, respectively. Biomagnification under environmentally realistic exposure seemed to be low, although it was likely to occur in the food chain P. acuta to G. tigrina exposed to AgNO3. Single-species tests generally could not reliably predict Ag bioaccumulation in the more complex mesocosm scenario. This study provides methodologies/data to better understand exposure, toxicokinetics and bioaccumulation of Ag in complex systems, reinforcing the need to use mesocosm studies to improve the risk assessment of environmental contaminants, specifically NPs, in aquatic environments.
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Affiliation(s)
- Patrícia V Silva
- Department of Biology and CESAM, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal.
| | - Ana Rita R Silva
- Department of Biology and CESAM, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Nathaniel J Clark
- School of Biological and Marine Sciences, University of Plymouth, Plymouth, UK
| | - Joanne Vassallo
- School of Biological and Marine Sciences, University of Plymouth, Plymouth, UK
| | - Marta Baccaro
- Department of Toxicology, Wageningen University, Wageningen, the Netherlands
| | - Neja Medvešček
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Večna pot 111, 1000 Ljubljana, Slovenia
| | - Magdalena Grgić
- Department of Biology, Josip Juraj Strossmayer University of Osijek, Cara Hadrijana 8/A, 31000 Osijek, Croatia
| | - Abel Ferreira
- Department of Biology and CESAM, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | | | - Kerstin Jurkschat
- Department of Materials, Oxford University Begbroke Science Park, Begbroke, UK
| | - Anastasios G Papadiamantis
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, B15 2TT Birmingham, UK; NovaMechanics Ltd., 1065 Nicosia, Cyprus
| | - Victor Puntes
- Institut Català de Nanociència i Nanotecnologia (ICN2), CSIC, The Barcelona Institute of Science and Technology (BIST), Campus UAB, Bellaterra, Barcelona, Spain; Institució Catalana de Recerca i Estudis Avançats (ICREA), 08010 Barcelona, Spain; Vall d'Hebron Institut de Recerca (VHIR), 08035 Barcelona, Spain
| | - Iseult Lynch
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, B15 2TT Birmingham, UK
| | - Claus Svendsen
- Centre of Ecology and Hydrology (CEH-NERC), Wallingford, UK
| | | | - Richard D Handy
- School of Biological and Marine Sciences, University of Plymouth, Plymouth, UK
| | - Cornelis A M van Gestel
- Amsterdam Institute for Life and Environment (A-LIFE), Faculty of Science, Vrije Universiteit Amsterdam, the Netherlands
| | - Susana Loureiro
- Department of Biology and CESAM, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
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4
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Gottschalk F, Debray B, Klaessig F, Park B, Lacome JM, Vignes A, Portillo VP, Vázquez-Campos S, Hendren CO, Lofts S, Harrison S, Svendsen C, Kaegi R. Predicting accidental release of engineered nanomaterials to the environment. Nat Nanotechnol 2023; 18:412-418. [PMID: 36732591 DOI: 10.1038/s41565-022-01290-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2021] [Accepted: 11/07/2022] [Indexed: 06/18/2023]
Abstract
Challenges in distinguishing between natural and engineered nanomaterials (ENMs) and the lack of historical records on ENM accidents have hampered attempts to estimate the accidental release and associated environmental impacts of ENMs. Building on knowledge from the nuclear power industry, we provide an assessment of the likelihood of accidental release rates of ENMs within the next 10 and 30 years. We evaluate risk predictive methodology and compare the results with empirical evidence, which enables us to propose modelling approaches to estimate accidental release risk probabilities. Results from two independent modelling approaches based on either assigning 0.5% of reported accidents to ENM-releasing accidents (M1) or based on an evaluation of expert opinions (M2) correlate well and predict severe accidental release of 7% (M1) in the next 10 years and of 10% and 20% for M2 and M1, respectively, in the next 30 years. We discuss the relevance of these results in a regulatory context.
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Affiliation(s)
- Fadri Gottschalk
- ETSS AG, Engineering, Technical and Scientific Services, Strada, Switzerland
| | - Bruno Debray
- Institut national de l'environment industriel et des risques, Verneuil-en-Halatte, France
| | | | | | - Jean-Marc Lacome
- Institut national de l'environment industriel et des risques, Verneuil-en-Halatte, France
| | - Alexis Vignes
- Institut national de l'environment industriel et des risques, Verneuil-en-Halatte, France
| | | | | | - Christine Ogilvie Hendren
- Center for the Environmental Implications of Nano Technology (CEINT), Duke University, Durham, NC, USA
| | - Stephen Lofts
- UK Centre for Ecology & Hydrology, Lancaster Environment Centre, Bailrigg, UK
| | - Samuel Harrison
- UK Centre for Ecology & Hydrology, Lancaster Environment Centre, Bailrigg, UK
| | | | - Ralf Kaegi
- Eawag, Swiss Federal Institute of Aquatic Science and Technology, Dübendorf, Switzerland.
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5
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Lahive E, Matzke M, Svendsen C, Spurgeon DJ, Pouran H, Zhang H, Lawlor A, Glória Pereira M, Lofts S. Soil properties influence the toxicity and availability of Zn from ZnO nanoparticles to earthworms. Environ Pollut 2023; 319:120907. [PMID: 36586557 DOI: 10.1016/j.envpol.2022.120907] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Revised: 12/16/2022] [Accepted: 12/17/2022] [Indexed: 06/17/2023]
Abstract
To develop models that support site-specific risk assessment for nanoparticles (NPs), a better understanding of how NP transformation processes, bioavailability and toxicity are influenced by soil properties is needed. In this study, the influence of differing soil properties on the bioavailability and toxicity of zinc oxide (ZnO) NPs and ionic Zn to the earthworm Eisenia fetida was investigated. Earthworms were exposed to ZnO_NPs and ionic Zn, between 100 and 4400 mg Zn/kg, in four different natural soils (organic matter content: 1.8-16.7%, soil pH: 5.4-8.3, representing sandy loam to calcareous soils). Survival and reproduction were assessed after 28 and 56 days, respectively. Zn concentrations in soil pore waters were measured while labile concentrations of Zn were measured using an in-situ dynamic speciation technique (diffusive gradient in thin films, DGT). Earthworm Zn tissue concentrations were also measured. Soil properties influenced earthworm reproduction between soil controls, with highest reproductive output in soils with pH values of 6-7. Toxicity was also influenced by soil properties, with EC50s based on total Zn in soil ranging from 694 to >2200 mg Zn/kg for ZnO_NP and 277-734 mg Zn/kg for ionic Zn. Soil pore water and DGT measurements showed good agreement in the relative amount of Zn extracted across the four soils. Earthworms exposed to ZnO_NPs survived higher Zn concentrations in the soils and had higher tissue concentrations compared with ionic Zn exposures, particularly in the high organic content calcareous soil. These higher tissue concentrations in ZnO_NP exposed earthworm could have consequences for the persistence and trophic mobility of Zn in terrestrial systems and need to be further investigated to elucidate if there any longer-term risks associated with sustained input of ZnO_NP to soil.
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Affiliation(s)
- E Lahive
- UK Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, OX10 8BB, United Kingdom.
| | - M Matzke
- UK Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, OX10 8BB, United Kingdom
| | - C Svendsen
- UK Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, OX10 8BB, United Kingdom
| | - D J Spurgeon
- UK Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, OX10 8BB, United Kingdom
| | - H Pouran
- Faculty of Science and Engineering, University of Wolverhampton, Wolverhampton, WV1 1LY, United Kingdom
| | - H Zhang
- Lancaster Environment Centre, Lancaster University, Lancaster, LA1 4YQ, United Kingdom
| | - A Lawlor
- UK Centre for Ecology and Hydrology, Lancaster Environment Centre, Lancaster, LA1 4AP, United Kingdom
| | - M Glória Pereira
- UK Centre for Ecology and Hydrology, Lancaster Environment Centre, Lancaster, LA1 4AP, United Kingdom
| | - S Lofts
- UK Centre for Ecology and Hydrology, Lancaster Environment Centre, Lancaster, LA1 4AP, United Kingdom
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6
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Khodaparast Z, van Gestel CAM, Silva ARR, Cornelis G, Lahive E, Etxabe AG, Svendsen C, Baccaro M, van den Brink N, Medvešček N, Novak S, Kokalj AJ, Drobne D, Jurkschat K, Loureiro S. Toxicokinetics of Ag from Ag 2S NP exposure in Tenebrio molitor and Porcellio scaber: Comparing single-species tests to indoor mesocosm experiments. NanoImpact 2023; 29:100454. [PMID: 36781073 DOI: 10.1016/j.impact.2023.100454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 02/02/2023] [Accepted: 02/09/2023] [Indexed: 06/18/2023]
Abstract
Determining the potential for accumulation of Ag from Ag2S NPs as an environmentally relevant form of AgNPs in different terrestrial organisms is an essential component of a realistic risk assessment of AgNP emissions to soils. The objectives of this study were first to determine the uptake kinetics of Ag in mealworms (Tenebrio molitor) and woodlice (Porcellio scaber) exposed to Ag2S NPs in a mesocosm test, and second, to check if the obtained toxicokinetics could be predicted by single-species bioaccumulation tests. In the mesocosms, mealworms and woodlice were exposed together with plants and earthworms in soil columns spiked with 10 μg Ag g-1 dry soil as Ag2S NPs or AgNO3. The total Ag concentrations in the biota were measured after 7, 14, and 28 days of exposure. A one-compartment model was used to calculate the Ag uptake and elimination rate constants. Ag from Ag2S NPs appeared to be taken up by the mealworms with significantly different uptake rate constants in the mesocosm compared to single-species tests (K1 = 0.056 and 1.66 g dry soil g-1 dry body weight day-1, respectively), and a significant difference was found for the Ag bioaccumulation factor (BAFk = 0.79 and 0.15 g dry soil g-1 dry body weight, respectively). Woodlice did not accumulate Ag from Ag2S NPs in both tests, but uptake from AgNO3 was significantly slower in mesocosm than in single-species tests (K1 = 0.037 and 0.26 g dry soil g-1 dry body weight day-1, respectively). Our results are of high significance because they show that single-species tests may not be a good predictor for the Ag uptake in mealworms and woodlice in exposure systems having greater levels of biological complexity. Nevertheless, single-species tests could be used as a fast screening approach to assess the potential of a substance to accumulate in biota before more complex tests are conducted.
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Affiliation(s)
- Zahra Khodaparast
- CESAM-Centre for Environmental and Marine Studies & Department of Biology, University of Aveiro, Portugal.
| | - Cornelis A M van Gestel
- Amsterdam Institute for Life and Environment (A-LIFE), Faculty of Science, Vrije Universiteit Amsterdam, the Netherlands
| | - Ana Rita R Silva
- CESAM-Centre for Environmental and Marine Studies & Department of Biology, University of Aveiro, Portugal
| | - Geert Cornelis
- Department of Soil and Environment, Swedish University of Agricultural Sciences, Sweden
| | - Elma Lahive
- Centre of Ecology and Hydrology (CEH-NERC), UK
| | | | | | - Marta Baccaro
- Division of Toxicology, Wageningen University, the Netherlands
| | | | | | - Sara Novak
- Biotechnical Faculty, University of Ljubljana, Slovenia
| | | | | | - Kerstin Jurkschat
- Department of Materials, Oxford University Begbroke Science Park, United Kingdom
| | - Susana Loureiro
- CESAM-Centre for Environmental and Marine Studies & Department of Biology, University of Aveiro, Portugal
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7
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Clark N, Vassallo J, Silva PV, Silva ARR, Baccaro M, Medvešček N, Grgić M, Ferreira A, Busquets-Fité M, Jurkschat K, Papadiamantis AG, Puntes V, Lynch I, Svendsen C, van den Brink NW, van Gestel CAM, Loureiro S, Handy RD. Metal transfer to sediments, invertebrates and fish following waterborne exposure to silver nitrate or silver sulfide nanoparticles in an indoor stream mesocosm. Sci Total Environ 2022; 850:157912. [PMID: 35952886 DOI: 10.1016/j.scitotenv.2022.157912] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 07/25/2022] [Accepted: 08/04/2022] [Indexed: 06/15/2023]
Abstract
The fate of engineered nanomaterials in ecosystems is unclear. An aquatic stream mesocosm explored the fate and bioaccumulation of silver sulfide nanoparticles (Ag2S NPs) compared to silver nitrate (AgNO3). The aims were to determine the total Ag in water, sediment and biota, and to evaluate the bioavailable fractions of silver in the sediment using a serial extraction method. The total Ag in the water column from a nominal daily dose of 10 μg L-1 of Ag for the AgNO3 or Ag2S NP treatments reached a plateau of around 13 and 12 μg L-1, respectively, by the end of the study. Similarly, the sediment of both Ag-treatments reached ~380 μg Ag kg-1, and with most of it being acid-extractable/labile. The biota accumulated 4-59 μg Ag g-1 dw, depending on the type of Ag-treatment and organism. The oligochaete worm, Lumbriculus variegatus, accumulated Ag from the Ag2S exposure over time, which was similar to the AgNO3 treatment by the end of the experiment. The planarian, Girardia tigrina, and the chironomid larva, Chironomus riparius, showed much higher Ag concentrations than the oligochaete worms; and with a clearer time-dependent statistically significant Ag accumulation relative to the untreated controls. For the pulmonate snail, Physa acuta, bioaccumulation of Ag from AgNO3 and Ag2S NP exposures was observed, but was lower from the nano treatment. The AgNO3 exposure caused appreciable Ag accumulation in the water flea, Daphnia magna, but accumulation was higher in the Ag2S NP treatment (reaching 59 μg g-1 dw). In the rainbow trout, Oncorhynchus mykiss, AgNO3, but not Ag2S NPs, caused total Ag concentrations to increase in the tissues. Overall, the study showed transfer of total Ag from the water column to the sediment, and Ag bioaccumulation in the biota, with Ag from Ag2S NP exposure generally being less bioavailable than that from AgNO3.
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Affiliation(s)
- Nathaniel Clark
- School of Biological and Marine Sciences, University of Plymouth, Plymouth, UK
| | - Joanne Vassallo
- School of Biological and Marine Sciences, University of Plymouth, Plymouth, UK
| | - Patrícia V Silva
- Department of Biology and CESAM, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Ana Rita R Silva
- Department of Biology and CESAM, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Marta Baccaro
- Department of Toxicology, Wageningen University, Wageningen, the Netherlands
| | - Neja Medvešček
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Večna pot 111, 1000 Ljubljana, Slovenia
| | - Magdalena Grgić
- Department of Biology, Josip Juraj Strossmayer University of Osijek, Cara Hadrijana 8/A, 31000 Osijek, Croatia
| | - Abel Ferreira
- Department of Biology and CESAM, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | | | - Kerstin Jurkschat
- Department of Materials, Oxford University Begbroke Science Park, Begbroke, United Kingdom
| | - Anastasios G Papadiamantis
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, B15 2TT Birmingham, UK; NovaMechanics Ltd., 1065 Nicosia, Cyprus
| | - Victor Puntes
- Institut Català de Nanociència i Nanotecnologia (ICN2), CSIC, The Barcelona Institute of Science and Technology (BIST), Campus UAB, Bellaterra, Barcelona, Spain; Institució Catalana de Recerca i Estudis Avançats (ICREA), 08010 Barcelona, Spain; Vall d'Hebron Institut de Recerca (VHIR), 08035 Barcelona, Spain
| | - Iseult Lynch
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, B15 2TT Birmingham, UK
| | - Claus Svendsen
- Centre of Ecology and Hydrology (CEH-NERC), Wallingford, UK
| | | | - Cornelis A M van Gestel
- Amsterdam Institute for Life and Environment (A-LIFE), Faculty of Science, Vrije Universiteit Amsterdam, the Netherlands
| | - Susana Loureiro
- Department of Biology and CESAM, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Richard D Handy
- School of Biological and Marine Sciences, University of Plymouth, Plymouth, UK.
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8
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Swart E, Martell E, Svendsen C, Spurgeon DJ. Soil Ecotoxicology Needs Robust Biomarkers: A Meta-Analysis Approach to Test the Robustness of Gene Expression-Based Biomarkers for Measuring Chemical Exposure Effects in Soil Invertebrates. Environ Toxicol Chem 2022; 41:2124-2138. [PMID: 35698918 PMCID: PMC9543370 DOI: 10.1002/etc.5402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 03/01/2022] [Accepted: 05/31/2022] [Indexed: 06/15/2023]
Abstract
Gene expression-based biomarkers are regularly proposed as rapid, sensitive, and mechanistically informative tools to identify whether soil invertebrates experience adverse effects due to chemical exposure. However, before biomarkers could be deployed within diagnostic studies, systematic evidence of the robustness of such biomarkers to detect effects is needed. In our study, we present an approach for conducting a meta-analysis of the robustness of gene expression-based biomarkers in soil invertebrates. The approach was developed and trialed for two measurements of gene expression commonly proposed as biomarkers in soil ecotoxicology: earthworm metallothionein (MT) gene expression for metals and earthworm heat shock protein 70 (HSP70) gene expression for organic chemicals. We collected 294 unique gene expression data points from the literature and used linear mixed-effect models to assess concentration, exposure duration, and species effects on the quantified response. The meta-analysis showed that the expression of earthworm MT was strongly metal concentration dependent, stable over time and species independent. The metal concentration-dependent response was strongest for cadmium, indicating that this gene is a suitable biomarker for this metal. For copper, no clear concentration-dependent response of MT gene expression in earthworms was found, indicating MT is not a reliable biomarker for this metal. For HSP70, overall marginal up-regulation and lack of a concentration-dependent response indicated that this gene is not suitable as a biomarker for organic pollutant effects in earthworms. The present study demonstrates how meta-analysis can be used to assess the status of biomarkers. We encourage colleagues to apply this open-access approach to other biomarkers, as such quantitative assessment is a prerequisite to ensuring that the suitability and limitations of proposed biomarkers are known and stated. Environ Toxicol Chem 2022;41:2124-2138. © 2022 The Authors. Environmental Toxicology and Chemistry published by Wiley Periodicals LLC on behalf of SETAC.
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Affiliation(s)
- Elmer Swart
- UK Centre for Ecology and HydrologyWallingfordUK
| | - Ellie Martell
- United Kingdom Department for EnvironmentFood & Rural AffairsLondonUK
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9
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Cross RK, Bossa N, Stolpe B, Loosli F, Sahlgren NM, Clausen PA, Delpivo C, Persson M, Valsesia A, Ponti J, Mehn D, Seleci DA, Müller P, von der Kammer F, Rauscher H, Spurgeon D, Svendsen C, Wohlleben W. Reproducibility of methods required to identify and characterize nanoforms of substances. NanoImpact 2022; 27:100410. [PMID: 35787478 DOI: 10.1016/j.impact.2022.100410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 06/24/2022] [Accepted: 06/25/2022] [Indexed: 06/15/2023]
Abstract
Nanoforms (NFs) of a substance may be distinguished from one another through differences in their physicochemical properties. When registering nanoforms of a substance for assessment under the EU REACH framework, five basic descriptors are required for their identification: composition, surface chemistry, size, specific surface area and shape. To make the risk assessment of similar NFs efficient, a number of grouping frameworks have been proposed, which often require assessment of similarity on individual physicochemical properties as part of the group justification. Similarity assessment requires an understanding of the achievable accuracy of the available methods. It must be demonstrated that measured differences between NFs are greater than the achievable accuracy of the method, to have confidence that the measured differences are indeed real. To estimate the achievable accuracy of a method, we assess the reproducibility of six analytical techniques routinely used to measure these five basic descriptors of nanoforms: inductively coupled plasma mass spectrometry (ICP-MS), Thermogravimetric analysis (TGA), Electrophoretic light scattering (ELS), Brunauer-Emmett-Teller (BET) specific surface area and transmission and scanning electron microscopy (TEM and SEM). Assessment was performed on representative test materials to evaluate the reproducibility of methods on single NFs of substances. The achievable accuracy was defined as the relative standard deviation of reproducibility (RSDR) for each method. Well established methods such as ICP-MS quantification of metal impurities, BET measurements of specific surface area, TEM and SEM for size and shape and ELS for surface potential and isoelectric point, all performed well, with low RSDR, generally between 5 and 20%, with maximal fold differences usually <1.5 fold between laboratories. Applications of technologies such as TGA for measuring water content and putative organic impurities, additives or surface treatments (through loss on ignition), which have a lower technology readiness level, demonstrated poorer reproducibility, but still within 5-fold differences. The expected achievable accuracy of ICP-MS may be estimated for untested analytes using established relationships between concentration and reproducibility, but this is not yet the case for TGA measurements of loss on ignition or water content. The results here demonstrate an approach to estimate the achievable accuracy of a method that should be employed when interpreting differences between NFs on individual physicochemical properties.
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Affiliation(s)
- Richard K Cross
- UK Centre for Ecology and Hydrology, Pollution, Wallingford, Oxfordshire, United Kingdom.
| | - Nathan Bossa
- LEITAT Technological Center, Carrer de la Innovació 2, 08225 Terrassa, Barcelona, Spain
| | | | - Frédéric Loosli
- Environmental Geosciences, Centre for Microbiology and Environmental Systems Science, University of Vienna, Wien, Austria
| | | | - Per Axel Clausen
- The National Research Centre for the Working Environment, Copenhagen, Denmark
| | - Camilla Delpivo
- LEITAT Technological Center, Carrer de la Innovació 2, 08225 Terrassa, Barcelona, Spain
| | | | - Andrea Valsesia
- European Commission, Joint Research Centre (JRC), Ispra, Italy
| | - Jessica Ponti
- European Commission, Joint Research Centre (JRC), Ispra, Italy
| | - Dora Mehn
- European Commission, Joint Research Centre (JRC), Ispra, Italy
| | - Didem Ag Seleci
- BASF SE, Department of Material Physics and Department of Experimental Toxicology & Ecology, Ludwigshafen, Germany
| | - Philipp Müller
- BASF SE, Department of Material Physics and Department of Experimental Toxicology & Ecology, Ludwigshafen, Germany
| | - Frank von der Kammer
- Environmental Geosciences, Centre for Microbiology and Environmental Systems Science, University of Vienna, Wien, Austria
| | - Hubert Rauscher
- European Commission, Joint Research Centre (JRC), Ispra, Italy
| | - Dave Spurgeon
- UK Centre for Ecology and Hydrology, Pollution, Wallingford, Oxfordshire, United Kingdom
| | - Claus Svendsen
- UK Centre for Ecology and Hydrology, Pollution, Wallingford, Oxfordshire, United Kingdom
| | - Wendel Wohlleben
- BASF SE, Department of Material Physics and Department of Experimental Toxicology & Ecology, Ludwigshafen, Germany
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10
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Cross R, Matzke M, Spurgeon D, Diez M, Andres VG, Galvez EC, Esponda MF, Belinga-Desaunay-Nault MF, Lynch I, Jeliazkova N, Svendsen C. Assessing the similarity of nanoforms based on the biodegradation of organic surface treatment chemicals. NanoImpact 2022; 26:100395. [PMID: 35560293 DOI: 10.1016/j.impact.2022.100395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 02/22/2022] [Accepted: 03/11/2022] [Indexed: 06/15/2023]
Abstract
A substance may have one or more nanoforms, defined for regulatory purposes under EU chemicals legislation REACH based on differences in physicochemical properties such as size, shape, specific surface area and surface chemistry including coatings. To reduce the burden of testing each unique nanoform for the environmental risk assessment of nanomaterials, grouping approaches allow simultaneous assessment of multiple nanoforms. Nanoforms with initially different intrinsic properties, could still be considered similar if their environmental fate and effects can be demonstrated to be similar. One hypothesis to group nanoforms with different organic surface modifications is to use parameters linked to biodegradation of the organic surface. The hypothesis contends that nanoforms with a similar core chemistry, but different organic surface treatments may be grouped, if the surface treatment is likely to be lost through biodegradation rapidly upon entering an environmental compartment, such that it no longer modulates fate, exposure and toxicity of the nanoform. To implement grouping according to surface treatment biodegradability, a robust approach to measure the breakdown of particle surface treatments is needed. We present a tiered testing strategy to assess the biodegradation of organic surface treatments used with nanomaterials that can be implemented as part of an Integrated Approach to Testing and Assessment (IATA) for grouping based on surface treatment stability. The tiered approach consists of an initial pre-screening MT2 colorimetric carbon substrate utilisation assay, to provide a rapid assessment of coating degradation, and a second tier of testing using OECD Test Guideline 301F for assessing organic chemical biodegradability. Six common surface treatment substances are assessed using the tiered testing strategy to refine rules for escalating between tiers. Similarity assessment using absolute Euclidean distances and x-fold difference concluded that the Tier 1 assessment can be used as conservative binary screening for biodegradability (no false positive results in Tier 1), whilst for substances showing intermediate biodegradation (10-60% in OECD 301F, Tier 2), similarity assessments can be informative for grouping surface treatments not considered readily biodegradable. Further validation using higher tier tests (e.g., mesocosms) is needed to define acceptable limits of similarity between intermediately biodegradable substances, where differences in biodegradability of the surface coating lead to negligible differences in fate, behaviour and toxicity of the nanoforms, and this is critically discussed.
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Affiliation(s)
- Richard Cross
- UK Centre for Ecology and Hydrology, Wallingford, United Kingdom.
| | - Marianne Matzke
- UK Centre for Ecology and Hydrology, Wallingford, United Kingdom
| | - Dave Spurgeon
- UK Centre for Ecology and Hydrology, Wallingford, United Kingdom
| | - María Diez
- LEITAT Technological Center, Carrer de la Innovació 2, Terrassa, 08225, Barcelona, Spain
| | | | - Elena Cerro Galvez
- LEITAT Technological Center, Carrer de la Innovació 2, Terrassa, 08225, Barcelona, Spain
| | - Maria Fernanda Esponda
- LEITAT Technological Center, Carrer de la Innovació 2, Terrassa, 08225, Barcelona, Spain
| | | | - Iseult Lynch
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, United Kingdom
| | | | - Claus Svendsen
- UK Centre for Ecology and Hydrology, Wallingford, United Kingdom
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11
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Lahive E, Cross R, Saarloos AI, Horton AA, Svendsen C, Hufenus R, Mitrano DM. Earthworms ingest microplastic fibres and nanoplastics with effects on egestion rate and long-term retention. Sci Total Environ 2022; 807:151022. [PMID: 34662614 DOI: 10.1016/j.scitotenv.2021.151022] [Citation(s) in RCA: 43] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 09/23/2021] [Accepted: 10/12/2021] [Indexed: 06/13/2023]
Abstract
Microplastic fibres (MPFs) and nanoplastics (NPs) have the potential to be hazardous to soil organisms. Understanding uptake into organisms is key in assessing these effects, but this is often limited by the analytical challenges to quantify smaller-sized plastics in complex matrices. This study used MPFs and NPs containing inorganic tracers (In, Pd) to quantify uptake in the earthworm Lumbricus terrestris. Following seven days exposure, tracer concentrations were measured in earthworms and faeces. Earthworms exposed to 500 μg MPFs/g soil retained an estimated 32 MPFs in their tissues, while at 5000 μg MPFs/g earthworms retained between 2 and 593 MPFs. High variation in body burdens of MPFs was linked to soil retention in earthworms and reduced faeces production, suggesting egestion was being affected by MPFs. NPs uptake and elimination was also assessed over a more extended time-period of 42 days. After 1 day, NPs were no longer detectable in faeces during the elimination phase. However, some retention of NPs in the earthworms was estimated, not linked to retained soil, indicating not all NPs were eliminated. MPFs and NPs uptake can be quantified in earthworms and both particle types can be retained beyond the depuration period, suggesting the potential for longer-term accumulation.
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Affiliation(s)
- Elma Lahive
- UK Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Oxfordshire OX10 8BB, UK.
| | - Richard Cross
- UK Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Oxfordshire OX10 8BB, UK
| | - Aafke I Saarloos
- UK Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Oxfordshire OX10 8BB, UK; Department of Toxicology, Wageningen University, Wageningen, the Netherlands
| | - Alice A Horton
- UK Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Oxfordshire OX10 8BB, UK; National Oceanography Centre, European Way, SO14 3ZH Southampton, UK
| | - Claus Svendsen
- UK Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Oxfordshire OX10 8BB, UK
| | - Rudolf Hufenus
- Laboratory of Advanced Fibers, Empa, 9014 St. Gallen, Switzerland
| | - Denise M Mitrano
- Department of Environmental Systems Science, ETH Zurich, 8092 Zürich, Switzerland
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12
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Loosli F, Rasmussen K, Rauscher H, Cross RK, Bossa N, Peijnenburg W, Arts J, Matzke M, Svendsen C, Spurgeon D, Clausen PA, Ruggiero E, Wohlleben W, von der Kammer F. Refinement of the selection of physicochemical properties for grouping and read-across of nanoforms. NanoImpact 2022; 25:100375. [PMID: 35559881 DOI: 10.1016/j.impact.2021.100375] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 11/24/2021] [Accepted: 12/08/2021] [Indexed: 06/15/2023]
Abstract
Before placing a new nanoform (NF) on the market, its potential adverse effects must be evaluated. This may e.g. be done via hazard and risk assessment. Grouping and read-across of NFs is a possible strategy to reduce resource consumption, maximising the use of existing data for assessment of NFs. The GRACIOUS project provides a framework in which possible grouping and read-across for NFs is mainly based on an evaluation of their similarity. The impact of NFs on human health and the environment depends strongly on the concentration of the NF and its physicochemical properties, such as chemical composition, size distribution, shape, etc. Hence, knowledge of the most relevant physicochemical properties is essential information for comparing similarity. The presented work aims to refine existing proposals for sets of descriptors (descriptor array) that are needed to describe distinct NFs of a material to identify the most relevant ones for grouping and read-across. The selection criteria for refining this descriptor array are explained and demonstrated. Relevant protocols and methods are proposed for each physicochemical property. The required and achievable measurement accuracies of the refined descriptor array are reviewed, as this information is necessary for similarity assessment of NFs based on individual physicochemical properties.
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Affiliation(s)
- Frédéric Loosli
- Environmental Geosciences, Centre for Microbiology and Environmental Systems Science, University of Vienna, Wien, Austria.
| | | | - Hubert Rauscher
- European Commission, Joint Research Centre (JRC), Ispra, Italy
| | - Richard K Cross
- UK Centre for Ecology and Hydrology, Pollution, Wallingford, Oxfordshire, United Kingdom
| | - Nathan Bossa
- Leitat Technological Center, 08225 Terrassa, Barcelona, Spain
| | - Willie Peijnenburg
- National Institute of Public Health and the Environment (RIVM), Center for Safety of Substances and Products, Bilthoven, the Netherlands; Leiden University, Institute of Environmental Sciences (CML), P.O. Box 9518, 2300 RA Leiden, the Netherlands
| | - Josje Arts
- Nouryon Chemicals BV, Velperweg 76, 6824 BM Arnhem, the Netherlands
| | - Marianne Matzke
- UK Centre for Ecology and Hydrology, Pollution, Wallingford, Oxfordshire, United Kingdom
| | - Claus Svendsen
- UK Centre for Ecology and Hydrology, Pollution, Wallingford, Oxfordshire, United Kingdom
| | - David Spurgeon
- UK Centre for Ecology and Hydrology, Pollution, Wallingford, Oxfordshire, United Kingdom
| | - Per Axel Clausen
- The National Research Centre for the Working Environment (NFA), Lersø Parkallé 105, 2100 Copenhagen East, Denmark
| | - Emmanuel Ruggiero
- BASF SE, Dept. of Material Physics, Dept. of Experimental Toxicology and Ecology, 67056 Ludwigshafen, Germany
| | - Wendel Wohlleben
- BASF SE, Dept. of Material Physics, Dept. of Experimental Toxicology and Ecology, 67056 Ludwigshafen, Germany
| | - Frank von der Kammer
- Environmental Geosciences, Centre for Microbiology and Environmental Systems Science, University of Vienna, Wien, Austria
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13
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Jeliazkova N, Bleeker E, Cross R, Haase A, Janer G, Peijnenburg W, Pink M, Rauscher H, Svendsen C, Tsiliki G, Zabeo A, Hristozov D, Stone V, Wohlleben W. How can we justify grouping of nanoforms for hazard assessment? Concepts and tools to quantify similarity. NanoImpact 2022; 25:100366. [PMID: 35559874 DOI: 10.1016/j.impact.2021.100366] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 10/15/2021] [Accepted: 11/12/2021] [Indexed: 06/15/2023]
Abstract
The risk of each nanoform (NF) of the same substance cannot be assumed to be the same, as they may vary in their physicochemical characteristics, exposure and hazard. However, neither can we justify a need for more animal testing and resources to test every NF individually. To reduce the need to test all NFs, (regulatory) information requirements may be fulfilled by grouping approaches. For such grouping to be acceptable, it is important to demonstrate similarities in physicochemical properties, toxicokinetic behaviour, and (eco)toxicological behaviour. The GRACIOUS Framework supports the grouping of NFs, by identifying suitable grouping hypotheses that describe the key similarities between different NFs. The Framework then supports the user to gather the evidence required to test these hypotheses and to subsequently assess the similarity of the NFs within the proposed group. The evidence needed to support a hypothesis is gathered by an Integrated Approach to Testing and Assessment (IATA), designed as decision trees constructed of decision nodes. Each decision node asks the questions and provides the methods needed to obtain the most relevant information. This White paper outlines existing and novel methods to assess similarity of the data generated for each decision node, either via a pairwise analysis conducted property-by-property, or by assessing multiple decision nodes simultaneously via a multidimensional analysis. For the pairwise comparison conducted property-by-property we included in this White paper: The x-fold, Bayesian and Arsinh-OWA distance algorithms performed comparably in the scoring of similarity between NF pairs. The Euclidean distance was also useful, but only with proper data transformation. The x-fold method does not standardize data, and thus produces skewed histograms, but has the advantage that it can be implemented without programming knowhow. A range of multidimensional evaluations, using for example dendrogram clustering approaches, were also investigated. Multidimensional distance metrics were demonstrated to be difficult to use in a regulatory context, but from a scientific perspective were found to offer unexpected insights into the overall similarity of very different materials. In conclusion, for regulatory purposes, a property-by-property evaluation of the data matrix is recommended to substantiate grouping, while the multidimensional approaches are considered to be tools of discovery rather than regulatory methods.
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Affiliation(s)
| | - Eric Bleeker
- National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands
| | - Richard Cross
- UKRI Centre for Ecology and Hydrology, MacLean Building, Benson Lane, Wallingford OX10 8BB, UK
| | - Andrea Haase
- German Federal Institute for Risk Assessment (BfR), Department of Chemical and Product Safety, Berlin, Germany
| | - Gemma Janer
- LEITAT Technological Center, Barcelona, Spain
| | - Willie Peijnenburg
- National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands; Institute of Environmental Sciences (CML), Leiden University, Leiden, the Netherlands
| | - Mario Pink
- German Federal Institute for Risk Assessment (BfR), Department of Chemical and Product Safety, Berlin, Germany
| | - Hubert Rauscher
- European Commission, Joint Research Centre (JRC), Ispra, Italy
| | - Claus Svendsen
- UKRI Centre for Ecology and Hydrology, MacLean Building, Benson Lane, Wallingford OX10 8BB, UK
| | - Georgia Tsiliki
- Athena-Research and Innovation Center in Information, Communication and Knowledge Technologies, Marousi, Greece
| | | | | | - Vicki Stone
- NanoSafety Research Group, Heriot-Watt University, Riccarton, Edinburgh EH14 4AS, UK
| | - Wendel Wohlleben
- BASF SE, Dept. Material Physics and Dept Experimental Toxicology & Ecology, Ludwigshafen, Germany.
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14
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Lahive E, Schultz CL, Van Gestel CAM, Robinson A, Horton AA, Spurgeon DJ, Svendsen C, Busquets-Fité M, Matzke M, Green Etxabe A. A Kinetic Approach for Assessing the Uptake of Ag from Pristine and Sulfidized Ag Nanomaterials to Plants. Environ Toxicol Chem 2021; 40:1861-1872. [PMID: 33661534 DOI: 10.1002/etc.5031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 11/23/2020] [Accepted: 02/28/2021] [Indexed: 06/12/2023]
Abstract
Nanomaterials (NMs) are thermodynamically unstable by nature, and exposure of soil organisms to NMs in the terrestrial environment cannot be assumed constant. Thus, steady-state conditions may not apply to NMs, and bioaccumulation modeling for uptake should follow a dynamic approach. The one-compartment model allows the uptake and elimination of a chemical to be determined, while also permitting changes in exposure and growth to be taken into account. The aim of the present study was to investigate the accumulation of Ag from different Ag NM types (20 nm Ag0 NMs, 50 nm Ag0 NMs, and 25 nm Ag2 S NMs) in the crop plant wheat (Triticum aestivum). Seeds were emerged in contaminated soils (3 or 10 mg Ag/kg dry soil, nominal) and plants grown for up to 42 d postemergence. Plant roots and shoots were collected after 1, 7, 14, 21, and 42 d postemergence; and total Ag was measured. Soil porewater Ag concentrations were also measured at each sampling time. Using the plant growth rates in the different treatments and the changing porewater concentrations as parameters, the one-compartment model was used to estimate the uptake and elimination of Ag from the plant tissues. The best fit of the model to the data included growth rate and porewater concentration decline, while showing elimination of Ag to be close to zero. Uptake was highest for Ag0 NMs, and size did not influence their uptake rates. Accumulation of Ag from Ag2 S NMs was lower, as reflected by the lower porewater concentrations. Environ Toxicol Chem 2021;40:1861-1872. © 2021 The Authors. Environmental Toxicology and Chemistry published by Wiley Periodicals LLC on behalf of SETAC.
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Affiliation(s)
- E Lahive
- UK Centre for Ecology and Hydrology, Crowmarsh Gifford, Wallingford, United Kingdom
| | - C L Schultz
- UK Centre for Ecology and Hydrology, Crowmarsh Gifford, Wallingford, United Kingdom
| | - C A M Van Gestel
- Department of Ecological Science, Faculty of Science, Vrije Universiteit, Amsterdam, The Netherlands
| | - A Robinson
- UK Centre for Ecology and Hydrology, Crowmarsh Gifford, Wallingford, United Kingdom
| | - A A Horton
- UK Centre for Ecology and Hydrology, Crowmarsh Gifford, Wallingford, United Kingdom
- National Oceanography Centre, Southampton, United Kingdom
| | - D J Spurgeon
- UK Centre for Ecology and Hydrology, Crowmarsh Gifford, Wallingford, United Kingdom
| | - C Svendsen
- UK Centre for Ecology and Hydrology, Crowmarsh Gifford, Wallingford, United Kingdom
| | | | - M Matzke
- UK Centre for Ecology and Hydrology, Crowmarsh Gifford, Wallingford, United Kingdom
| | - A Green Etxabe
- UK Centre for Ecology and Hydrology, Crowmarsh Gifford, Wallingford, United Kingdom
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15
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Horton AA, Cross RK, Read DS, Jürgens MD, Ball HL, Svendsen C, Vollertsen J, Johnson AC. Semi-automated analysis of microplastics in complex wastewater samples. Environ Pollut 2021; 268:115841. [PMID: 33120336 DOI: 10.1016/j.envpol.2020.115841] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 10/02/2020] [Accepted: 10/11/2020] [Indexed: 06/11/2023]
Abstract
In order to assess risks to the natural environment from microplastics, it is necessary to have reliable information on all potential inputs and discharges. This relies on stringent quality control measures to ensure accurate reporting. Here we focus on wastewater treatment works (WwTWs) and the complex sample matrices these provide. Composite samples of both influent and effluent were collected over a 24 h period on two separate occasions from eight different WwTWs across the UK. Sludge samples were taken on five occasions from five WwTWs. The WwTW treatments included activated sludge, trickling filter and biological aerated flooded filter with or without tertiary treatment. Using micro-FTIR analysis, microplastics ≥25 μm were identified and quantified. Procedural blanks were used to derive limits of detection (LOD) and limits of quantification (LOQ). Where values were above the LOQ, microplastics in the influent ranged from 955 to 17,214 microplastic particles/L and in the effluent from 2 to 54 microplastic particles/L, giving an average removal rate of 99.8%. Microplastics could be quantified in sludge at concentrations of 301-10,380 microplastics/g dry weight, this analytical method therefore revealing higher concentrations than reported in previous studies. The most common polymers present overall were polyethylene (PE), polypropylene (PP) and polyethylene terephthalate (PET). We also report on critical considerations for blank corrections and quality control measures to ensure reliable microplastic analysis across different sample types.
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Affiliation(s)
- Alice A Horton
- UK Centre for Ecology & Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, Oxfordshire, OX10 8BB, UK; National Oceanography Centre, European Way, Southampton, SO14 3ZH, UK.
| | - Richard K Cross
- UK Centre for Ecology & Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, Oxfordshire, OX10 8BB, UK
| | - Daniel S Read
- UK Centre for Ecology & Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, Oxfordshire, OX10 8BB, UK
| | - Monika D Jürgens
- UK Centre for Ecology & Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, Oxfordshire, OX10 8BB, UK
| | - Hollie L Ball
- UK Centre for Ecology & Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, Oxfordshire, OX10 8BB, UK; Lancaster Environment Centre, Lancaster University, Lancaster, LA1 4YQ, UK
| | - Claus Svendsen
- UK Centre for Ecology & Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, Oxfordshire, OX10 8BB, UK
| | - Jes Vollertsen
- Department of Civil Engineering, Aalborg University, Thomas Manns Vej 23, 9220, Aalborg, Denmark
| | - Andrew C Johnson
- UK Centre for Ecology & Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, Oxfordshire, OX10 8BB, UK
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16
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Swart E, Goodall T, Kille P, Spurgeon DJ, Svendsen C. The earthworm microbiome is resilient to exposure to biocidal metal nanoparticles. Environ Pollut 2020; 267:115633. [PMID: 33254656 DOI: 10.1016/j.envpol.2020.115633] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 09/07/2020] [Accepted: 09/09/2020] [Indexed: 06/12/2023]
Abstract
Environmental pollution can disrupt the interactions between animals and their symbiotic bacteria, which can lead to adverse effects on the host even in the absence of direct chemical toxicity. It is therefore crucial to understand how environmental pollutants affect animal microbiomes, especially for those chemicals that are designed to target microbes. Here, we study the effects of two biocidal nanoparticles (NPs) (Ag and CuO) on the soil bacterial community and the resident gut microbiome of the earthworm Eisenia fetida over a 28-day period using metabarcoding techniques. Exposures to NPs were conducted following OECD test guidelines and effects on earthworm reproduction and juvenile biomass were additionally recorded in order to compare effects on the host to effects on microbiomes. By employing a full concentration series, we were able to link pollutants to microbiome effects in high resolution. Multivariate analysis, differential abundance analysis and species sensitivity distribution analysis showed that Ag-NPs are more toxic to soil bacteria than CuO-NPs. In contrast to the strong effects of CuO-NPs and Ag-NPs on the soil bacterial community, the earthworm gut microbiome is largely resilient to exposure to biocidal NPs. Despite this buffering effect, CuO-NPs did negatively affect the relative abundance of some earthworm symbionts, including 'Candidatus Lumbricincola'. Changes in the soil bacterial community and the earthworm microbiome occur at total copper concentrations often found or modelled to occur in agricultural fields, demonstrating that soil bacterial communities and individual taxa in the earthworm microbiome may be at risk from environmental copper exposure including in nanomaterial form.
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Affiliation(s)
- Elmer Swart
- UK Centre for Ecology and Hydrology, Maclean Building Benson Lane, Wallingford, OX10 8BB, United Kingdom.
| | - Tim Goodall
- UK Centre for Ecology and Hydrology, Maclean Building Benson Lane, Wallingford, OX10 8BB, United Kingdom
| | - Peter Kille
- School of Biosciences, Cardiff University, Sir Martin Evans Building Museum Avenue, Cardiff, CF10 3AX, United Kingdom
| | - David J Spurgeon
- UK Centre for Ecology and Hydrology, Maclean Building Benson Lane, Wallingford, OX10 8BB, United Kingdom
| | - Claus Svendsen
- UK Centre for Ecology and Hydrology, Maclean Building Benson Lane, Wallingford, OX10 8BB, United Kingdom.
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17
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Johnson AC, Ball H, Cross R, Horton AA, Jürgens MD, Read DS, Vollertsen J, Svendsen C. Identification and Quantification of Microplastics in Potable Water and Their Sources within Water Treatment Works in England and Wales. Environ Sci Technol 2020; 54:12326-12334. [PMID: 32852201 DOI: 10.1021/acs.est.0c03211] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Microplastics were characterized in eight water treatment works (WTWs) in England and Wales (UK). Sources included river water, groundwater, and an upland reservoir. Water treatment varied from disinfection, filtration, sedimentation, and activated carbon techniques. At each WTW, five repeat samples of raw and potable water and two repeat sludge samples were taken over 5 months. Microplastics in water were captured on 10 μm filters and nonplastic materials digested in the laboratory. Microplastics ≥25 μm were analyzed using Fourier-transform infrared microscopy. Blanks revealed consistent polyethylene (PE), poly(ethylene terephthalate) (PET), and polypropylene (PP) contamination. Spike recoveries for 63-90 μm polyamide microplastics demonstrated 101% (standard deviation, SD 27%) and 113% (SD 15%) recovery for raw and potable waters and 52% (SD 13%) for sludge. Only four of the six WTWs sampled for raw water and only two of eight WTWs in their potable water had microplastics above the limit of quantification. Considering only the WTWs with quantifiable microplastics, then on average, 4.9 microplastic particles/L were present in raw water and only 0.00011 microplastic particles/L were present in potable water (99.99% removal). Values in waste sludge were highly variable. PE, PET, and PP were the most common polymers quantified in raw water and sludge, and polystyrene and acrylonitrile butadiene styrene were the most common polymers quantified in potable water.
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Affiliation(s)
- Andrew C Johnson
- UK Centre for Ecology & Hydrology (UKCEH), Wallingford, Oxfordshire OX10 8BB, U.K
| | - Hollie Ball
- UK Centre for Ecology & Hydrology (UKCEH), Wallingford, Oxfordshire OX10 8BB, U.K
- Lancaster Environment Centre (LEC), Lancaster University, Lancaster LA1 4YQ, U.K
| | - Richard Cross
- UK Centre for Ecology & Hydrology (UKCEH), Wallingford, Oxfordshire OX10 8BB, U.K
| | - Alice A Horton
- UK Centre for Ecology & Hydrology (UKCEH), Wallingford, Oxfordshire OX10 8BB, U.K
- National Oceanography Centre, European Way, Southampton SO14 3ZH, U.K
| | - Monika D Jürgens
- UK Centre for Ecology & Hydrology (UKCEH), Wallingford, Oxfordshire OX10 8BB, U.K
| | - Daniel S Read
- UK Centre for Ecology & Hydrology (UKCEH), Wallingford, Oxfordshire OX10 8BB, U.K
| | - Jes Vollertsen
- Department of Civil Engineering, Aalborg University, Thomas Manns Vej 23, Aalborg 9220, Denmark
| | - Claus Svendsen
- UK Centre for Ecology & Hydrology (UKCEH), Wallingford, Oxfordshire OX10 8BB, U.K
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Svendsen C, Walker LA, Matzke M, Lahive E, Harrison S, Crossley A, Park B, Lofts S, Lynch I, Vázquez-Campos S, Kaegi R, Gogos A, Asbach C, Cornelis G, von der Kammer F, van den Brink NW, Mays C, Spurgeon DJ. Key principles and operational practices for improved nanotechnology environmental exposure assessment. Nat Nanotechnol 2020; 15:731-742. [PMID: 32807878 DOI: 10.1038/s41565-020-0742-1] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Accepted: 06/23/2020] [Indexed: 06/11/2023]
Abstract
Nanotechnology is identified as a key enabling technology due to its potential to contribute to economic growth and societal well-being across industrial sectors. Sustainable nanotechnology requires a scientifically based and proportionate risk governance structure to support innovation, including a robust framework for environmental risk assessment (ERA) that ideally builds on methods established for conventional chemicals to ensure alignment and avoid duplication. Exposure assessment developed as a tiered approach is equally beneficial to nano-specific ERA as for other classes of chemicals. Here we present the developing knowledge, practical considerations and key principles need to support exposure assessment for engineered nanomaterials for regulatory and research applications.
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Affiliation(s)
- Claus Svendsen
- UK Centre for Ecology and Hydrology, Wallingford, Oxfordshire, UK
| | - Lee A Walker
- UK Centre for Ecology and Hydrology, Lancaster Environment Centre, Lancaster, UK
| | - Marianne Matzke
- UK Centre for Ecology and Hydrology, Wallingford, Oxfordshire, UK
| | - Elma Lahive
- UK Centre for Ecology and Hydrology, Wallingford, Oxfordshire, UK
| | - Samuel Harrison
- UK Centre for Ecology and Hydrology, Lancaster Environment Centre, Lancaster, UK
| | - Alison Crossley
- Department of Materials, Oxford University, Begbroke Science Park, Oxford, UK
| | | | - Stephen Lofts
- UK Centre for Ecology and Hydrology, Lancaster Environment Centre, Lancaster, UK
| | - Iseult Lynch
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, UK
| | | | - Ralf Kaegi
- EAWAG, Swiss Federal Institute of Aquatic Science and Technology, Dübendorf, Switzerland
| | - Alexander Gogos
- EAWAG, Swiss Federal Institute of Aquatic Science and Technology, Dübendorf, Switzerland
- EMPA, Swiss Federal Laboratories for Materials Science and Technology, St. Gallen, Switzerland
| | - Christof Asbach
- Department of Air Quality and Filtration, Institut für Energie- und Umwelttechnik e. V. (IUTA), Duisburg, Germany
| | - Geert Cornelis
- Department of Soil and Environment, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | | | - Nico W van den Brink
- Sub-department of Toxicology, Department of Agrotechnology and Food Sciences, Wageningen University, Wageningen, The Netherlands
| | | | - David J Spurgeon
- UK Centre for Ecology and Hydrology, Wallingford, Oxfordshire, UK.
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Swart E, Dvorak J, Hernádi S, Goodall T, Kille P, Spurgeon D, Svendsen C, Prochazkova P. The Effects of In Vivo Exposure to Copper Oxide Nanoparticles on the Gut Microbiome, Host Immunity, and Susceptibility to a Bacterial Infection in Earthworms. Nanomaterials (Basel) 2020; 10:E1337. [PMID: 32659907 PMCID: PMC7408611 DOI: 10.3390/nano10071337] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 07/03/2020] [Accepted: 07/06/2020] [Indexed: 02/06/2023]
Abstract
Nanomaterials (NMs) can interact with the innate immunity of organisms. It remains, however, unclear whether these interactions can compromise the immune functioning of the host when faced with a disease threat. Co-exposure with pathogens is thus a powerful approach to assess the immuno-safety of NMs. In this paper, we studied the impacts of in vivo exposure to a biocidal NM on the gut microbiome, host immune responses, and susceptibility of the host to a bacterial challenge in an earthworm. Eisenia fetida were exposed to CuO-nanoparticles in soil for 28 days, after which the earthworms were challenged with the soil bacterium Bacillus subtilis. Immune responses were monitored by measuring mRNA levels of known earthworm immune genes. Effects of treatments on the gut microbiome were also assessed to link microbiome changes to immune responses. Treatments caused a shift in the earthworm gut microbiome. Despite these effects, no impacts of treatment on the expression of earthworm immune markers were recorded. The methodological approach applied in this paper provides a useful framework for improved assessment of immuno-safety of NMs. In addition, we highlight the need to investigate time as a factor in earthworm immune responses to NM exposure.
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Affiliation(s)
- Elmer Swart
- UK Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Wallingford OX10 8BB, UK; (T.G.); (D.S.)
| | - Jiri Dvorak
- Laboratory of Cellular and Molecular Immunology, Institute of Microbiology of the Czech Academy of Sciences, Videnska 1083, 142 20 Prague 4, Czech Republic; (J.D.); (P.P.)
| | - Szabolcs Hernádi
- School of Biosciences, Cardiff University, Sir Martin Evans Building, Museum Avenue, Cardiff CF10 3AX, UK; (S.H.); (P.K.)
| | - Tim Goodall
- UK Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Wallingford OX10 8BB, UK; (T.G.); (D.S.)
| | - Peter Kille
- School of Biosciences, Cardiff University, Sir Martin Evans Building, Museum Avenue, Cardiff CF10 3AX, UK; (S.H.); (P.K.)
| | - David Spurgeon
- UK Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Wallingford OX10 8BB, UK; (T.G.); (D.S.)
| | - Claus Svendsen
- UK Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Wallingford OX10 8BB, UK; (T.G.); (D.S.)
| | - Petra Prochazkova
- Laboratory of Cellular and Molecular Immunology, Institute of Microbiology of the Czech Academy of Sciences, Videnska 1083, 142 20 Prague 4, Czech Republic; (J.D.); (P.P.)
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Spence EL, Chandler D, Edgington S, Berry SD, Martin G, O'Sullivan C, Svendsen C, Hesketh H. A standardised bioassay method using a bench-top spray tower to evaluate entomopathogenic fungi for control of the greenhouse whitefly, Trialeurodes vaporariorum. Pest Manag Sci 2020; 76:2513-2524. [PMID: 32077577 PMCID: PMC7317564 DOI: 10.1002/ps.5794] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Revised: 01/28/2020] [Accepted: 02/20/2020] [Indexed: 06/02/2023]
Abstract
BACKGROUND Bioassays evaluating entomopathogenic fungi (EPF) isolates for effective microbial control of whitefly are a fundamental part of the screening process for bioprotectants, but development of repeatable, robust bioassays is not straightforward. Currently, there is no readily available standardised method to test the efficacy of EPF on whitefly. Here, we describe the calibration and use of a spray tower to deliver a standardised protocol to assess EPF activity; the method was validated using 18 EPF from four genera in tests against greenhouse whitefly, Trialeurodes vaporariorum (Westwood). RESULTS At 138 kPa, the sprayer delivered 0.062 mL mm-2 (620 L ha-1 ) and an even deposition of spray across the central 1590 mm2 of the spray area. Average conidial deposition for all EPF was 252 conidia mm-2 and equivalent to 2.5 × 1012 conidia ha-1 at an application concentration of 1 × 107 conidia mL-1 . Conidial deposition of a test Beauveria bassiana suspension increased with increasing application concentration. Egg laying by T. vaporariorum adults was restricted to 177 mm2 using clip cages specifically designed to ensure that third-instar T. vaporariorum received a uniform spray coverage. Nymphs occupied 373 ± 5 mm2 of the leaf after migrating during the first instar. Average T. vaporariorum mortality totaled 8-89% 14 days after application of 1 × 107 conidia mL-1 of each EPF isolate. CONCLUSION Combining the calibrated sprayer and bioassay method provides a reliable, standardised approach to test the virulence of EPF against whitefly nymphs. This laboratory-based assay is affordable, replicable and allows the user to alter the dose of conidia applied to the target.
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Affiliation(s)
- Eleanor L Spence
- UK Centre for Ecology & Hydrology, Benson LaneCrowmarsh GiffordWallingfordUK
- Warwick Crop Centre, School of Life Sciences, Wellesbourne CampusThe University of WarwickWarwickUK
| | - David Chandler
- Warwick Crop Centre, School of Life Sciences, Wellesbourne CampusThe University of WarwickWarwickUK
| | | | | | | | | | - Claus Svendsen
- UK Centre for Ecology & Hydrology, Benson LaneCrowmarsh GiffordWallingfordUK
| | - Helen Hesketh
- UK Centre for Ecology & Hydrology, Benson LaneCrowmarsh GiffordWallingfordUK
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21
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Boraschi D, Alijagic A, Auguste M, Barbero F, Ferrari E, Hernadi S, Mayall C, Michelini S, Navarro Pacheco NI, Prinelli A, Swart E, Swartzwelter BJ, Bastús NG, Canesi L, Drobne D, Duschl A, Ewart MA, Horejs-Hoeck J, Italiani P, Kemmerling B, Kille P, Prochazkova P, Puntes VF, Spurgeon DJ, Svendsen C, Wilde CJ, Pinsino A. Addressing Nanomaterial Immunosafety by Evaluating Innate Immunity across Living Species. Small 2020; 16:e2000598. [PMID: 32363795 DOI: 10.1002/smll.202000598] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 03/12/2020] [Accepted: 03/13/2020] [Indexed: 06/11/2023]
Abstract
The interaction of a living organism with external foreign agents is a central issue for its survival and adaptation to the environment. Nanosafety should be considered within this perspective, and it should be examined that how different organisms interact with engineered nanomaterials (NM) by either mounting a defensive response or by physiologically adapting to them. Herein, the interaction of NM with one of the major biological systems deputed to recognition of and response to foreign challenges, i.e., the immune system, is specifically addressed. The main focus is innate immunity, the only type of immunity in plants, invertebrates, and lower vertebrates, and that coexists with adaptive immunity in higher vertebrates. Because of their presence in the majority of eukaryotic living organisms, innate immune responses can be viewed in a comparative context. In the majority of cases, the interaction of NM with living organisms results in innate immune reactions that eliminate the possible danger with mechanisms that do not lead to damage. While in some cases such interaction may lead to pathological consequences, in some other cases beneficial effects can be identified.
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Affiliation(s)
- Diana Boraschi
- Institute of Biochemistry and Cell Biology, National Research Council, Napoli, 80131, Italy
| | - Andi Alijagic
- Institute for Biomedical Research and Innovation, National Research Council, Palermo, 90146, Italy
| | - Manon Auguste
- Department of Earth, Environment and Life Sciences, University of Genova, Genova, 16126, Italy
| | - Francesco Barbero
- Institut Català de Nanosciència i Nanotecnologia (ICN2), Bellaterra, Barcelona, 08193, Spain
| | - Eleonora Ferrari
- Center for Plant Molecular Biology - ZMBP, Eberhard-Karls University Tübingen, Tübingen, 72076, Germany
| | - Szabolcs Hernadi
- School of Biosciences, Cardiff University, Cardiff, CF10 3AX, UK
| | - Craig Mayall
- Department of Biology, Biotechnical Faculty, University of Liubljana, Ljubljana, 1000, Slovenia
| | - Sara Michelini
- Department of Biosciences, Paris-Lodron University Salzburg, Salzburg, 5020, Austria
| | | | | | - Elmer Swart
- UK Centre for Ecology and Hydrology, Wallingford, OX10 8BB, UK
| | | | - Neus G Bastús
- Institut Català de Nanosciència i Nanotecnologia (ICN2), Bellaterra, Barcelona, 08193, Spain
| | - Laura Canesi
- Department of Earth, Environment and Life Sciences, University of Genova, Genova, 16126, Italy
| | - Damjana Drobne
- Department of Biology, Biotechnical Faculty, University of Liubljana, Ljubljana, 1000, Slovenia
| | - Albert Duschl
- Department of Biosciences, Paris-Lodron University Salzburg, Salzburg, 5020, Austria
| | | | - Jutta Horejs-Hoeck
- Department of Biosciences, Paris-Lodron University Salzburg, Salzburg, 5020, Austria
| | - Paola Italiani
- Institute of Biochemistry and Cell Biology, National Research Council, Napoli, 80131, Italy
| | - Birgit Kemmerling
- Center for Plant Molecular Biology - ZMBP, Eberhard-Karls University Tübingen, Tübingen, 72076, Germany
| | - Peter Kille
- School of Biosciences, Cardiff University, Cardiff, CF10 3AX, UK
| | - Petra Prochazkova
- Institute of Microbiology of the Czech Academy of Sciences, Prague, 142 20, Czech Republic
| | - Victor F Puntes
- Institut Català de Nanosciència i Nanotecnologia (ICN2), Bellaterra, Barcelona, 08193, Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, 08010, Spain
- Vall d Hebron, Institut de Recerca (VHIR), Barcelona, 08035, Spain
| | | | - Claus Svendsen
- UK Centre for Ecology and Hydrology, Wallingford, OX10 8BB, UK
| | | | - Annalisa Pinsino
- Institute for Biomedical Research and Innovation, National Research Council, Palermo, 90146, Italy
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22
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Afantitis A, Melagraki G, Isigonis P, Tsoumanis A, Varsou DD, Valsami-Jones E, Papadiamantis A, Ellis LJA, Sarimveis H, Doganis P, Karatzas P, Tsiros P, Liampa I, Lobaskin V, Greco D, Serra A, Kinaret PAS, Saarimäki LA, Grafström R, Kohonen P, Nymark P, Willighagen E, Puzyn T, Rybinska-Fryca A, Lyubartsev A, Alstrup Jensen K, Brandenburg JG, Lofts S, Svendsen C, Harrison S, Maier D, Tamm K, Jänes J, Sikk L, Dusinska M, Longhin E, Rundén-Pran E, Mariussen E, El Yamani N, Unger W, Radnik J, Tropsha A, Cohen Y, Leszczynski J, Ogilvie Hendren C, Wiesner M, Winkler D, Suzuki N, Yoon TH, Choi JS, Sanabria N, Gulumian M, Lynch I. NanoSolveIT Project: Driving nanoinformatics research to develop innovative and integrated tools for in silico nanosafety assessment. Comput Struct Biotechnol J 2020; 18:583-602. [PMID: 32226594 PMCID: PMC7090366 DOI: 10.1016/j.csbj.2020.02.023] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 02/18/2020] [Accepted: 02/29/2020] [Indexed: 01/26/2023] Open
Abstract
Nanotechnology has enabled the discovery of a multitude of novel materials exhibiting unique physicochemical (PChem) properties compared to their bulk analogues. These properties have led to a rapidly increasing range of commercial applications; this, however, may come at a cost, if an association to long-term health and environmental risks is discovered or even just perceived. Many nanomaterials (NMs) have not yet had their potential adverse biological effects fully assessed, due to costs and time constraints associated with the experimental assessment, frequently involving animals. Here, the available NM libraries are analyzed for their suitability for integration with novel nanoinformatics approaches and for the development of NM specific Integrated Approaches to Testing and Assessment (IATA) for human and environmental risk assessment, all within the NanoSolveIT cloud-platform. These established and well-characterized NM libraries (e.g. NanoMILE, NanoSolutions, NANoREG, NanoFASE, caLIBRAte, NanoTEST and the Nanomaterial Registry (>2000 NMs)) contain physicochemical characterization data as well as data for several relevant biological endpoints, assessed in part using harmonized Organisation for Economic Co-operation and Development (OECD) methods and test guidelines. Integration of such extensive NM information sources with the latest nanoinformatics methods will allow NanoSolveIT to model the relationships between NM structure (morphology), properties and their adverse effects and to predict the effects of other NMs for which less data is available. The project specifically addresses the needs of regulatory agencies and industry to effectively and rapidly evaluate the exposure, NM hazard and risk from nanomaterials and nano-enabled products, enabling implementation of computational 'safe-by-design' approaches to facilitate NM commercialization.
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Key Words
- (quantitative) Structure–activity relationships
- AI, Artificial Intelligence
- AOPs, Adverse Outcome Pathways
- API, Application Programming interface
- CG, coarse-grained (model)
- CNTs, carbon nanotubes
- Computational toxicology
- Engineered nanomaterials
- FAIR, Findable Accessible Inter-operable and Re-usable
- GUI, Graphical Processing Unit
- HOMO-LUMO, Highest Occupied Molecular Orbital Lowest Unoccupied Molecular Orbital
- Hazard assessment
- IATA, Integrated Approaches to Testing and Assessment
- Integrated approach for testing and assessment
- KE, key events
- MIE, molecular initiating events
- ML, machine learning
- MOA, mechanism (mode) of action
- MWCNT, multi-walled carbon nanotubes
- Machine learning
- NMs, nanomaterials
- Nanoinformatics
- OECD, Organisation for Economic Co-operation and Development
- PBPK, Physiologically Based PharmacoKinetics
- PC, Protein Corona
- PChem, Physicochemical
- PTGS, Predictive Toxicogenomics Space
- Predictive modelling
- QC, quantum-chemical
- QM, quantum-mechanical
- QSAR, quantitative structure-activity relationship
- QSPR, quantitative structure-property relationship
- RA, risk assessment
- REST, Representational State Transfer
- ROS, reactive oxygen species
- Read across
- SAR, structure-activity relationship
- SMILES, Simplified Molecular Input Line Entry System
- SOPs, standard operating procedures
- Safe-by-design
- Toxicogenomics
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Affiliation(s)
| | | | | | | | | | - Eugenia Valsami-Jones
- School of Geography, Earth and Environmental Sciences, University of Birmingham, B15 2TT Birmingham, UK
| | - Anastasios Papadiamantis
- School of Geography, Earth and Environmental Sciences, University of Birmingham, B15 2TT Birmingham, UK
| | - Laura-Jayne A. Ellis
- School of Geography, Earth and Environmental Sciences, University of Birmingham, B15 2TT Birmingham, UK
| | - Haralambos Sarimveis
- School of Chemical Engineering, National Technical University of Athens, 157 80 Athens, Greece
| | - Philip Doganis
- School of Chemical Engineering, National Technical University of Athens, 157 80 Athens, Greece
| | - Pantelis Karatzas
- School of Chemical Engineering, National Technical University of Athens, 157 80 Athens, Greece
| | - Periklis Tsiros
- School of Chemical Engineering, National Technical University of Athens, 157 80 Athens, Greece
| | - Irene Liampa
- School of Chemical Engineering, National Technical University of Athens, 157 80 Athens, Greece
| | - Vladimir Lobaskin
- School of Physics, University College Dublin, Belfield, Dublin 4, Ireland
| | - Dario Greco
- Faculty of Medicine and Health Technology, University of Tampere, FI-33014, Finland
| | - Angela Serra
- Faculty of Medicine and Health Technology, University of Tampere, FI-33014, Finland
| | | | | | - Roland Grafström
- Misvik Biology OY, Itäinen Pitkäkatu 4, 20520 Turku, Finland
- Karolinska Institute, Institute of Environmental Medicine, Nobels väg 13, 17177 Stockholm, Sweden
| | - Pekka Kohonen
- Misvik Biology OY, Itäinen Pitkäkatu 4, 20520 Turku, Finland
- Karolinska Institute, Institute of Environmental Medicine, Nobels väg 13, 17177 Stockholm, Sweden
| | - Penny Nymark
- Misvik Biology OY, Itäinen Pitkäkatu 4, 20520 Turku, Finland
- Karolinska Institute, Institute of Environmental Medicine, Nobels väg 13, 17177 Stockholm, Sweden
| | - Egon Willighagen
- Department of Bioinformatics – BiGCaT, School of Nutrition and Translational Research in Metabolism, Maastricht University, Universiteitssingel 50, 6229 ER Maastricht, the Netherlands
| | - Tomasz Puzyn
- QSAR Lab Ltd., Aleja Grunwaldzka 190/102, 80-266 Gdansk, Poland
- University of Gdansk, Faculty of Chemistry, Wita Stwosza 63, 80-308 Gdansk, Poland
| | | | - Alexander Lyubartsev
- Institutionen för material- och miljökemi, Stockholms Universitet, 106 91 Stockholm, Sweden
| | - Keld Alstrup Jensen
- The National Research Center for the Work Environment, Lersø Parkallé 105, 2100 Copenhagen, Denmark
| | - Jan Gerit Brandenburg
- Interdisciplinary Center for Scientific Computing, Heidelberg University, Germany
- Chief Digital Organization, Merck KGaA, Frankfurter Str. 250, 64293 Darmstadt, Germany
| | - Stephen Lofts
- UK Centre for Ecology and Hydrology, Library Ave, Bailrigg, Lancaster LA1 4AP, UK
| | - Claus Svendsen
- UK Centre for Ecology and Hydrology, MacLean Bldg, Benson Ln, Crowmarsh Gifford, Wallingford OX10 8BB, UK
| | - Samuel Harrison
- UK Centre for Ecology and Hydrology, Library Ave, Bailrigg, Lancaster LA1 4AP, UK
| | - Dieter Maier
- Biomax Informatics AG, Robert-Koch-Str. 2, 82152 Planegg, Germany
| | - Kaido Tamm
- Department of Chemistry, University of Tartu, Ülikooli 18, 50090 Tartu, Estonia
| | - Jaak Jänes
- Department of Chemistry, University of Tartu, Ülikooli 18, 50090 Tartu, Estonia
| | - Lauri Sikk
- Department of Chemistry, University of Tartu, Ülikooli 18, 50090 Tartu, Estonia
| | - Maria Dusinska
- NILU-Norwegian Institute for Air Research, Instituttveien 18, 2002 Kjeller, Norway
| | - Eleonora Longhin
- NILU-Norwegian Institute for Air Research, Instituttveien 18, 2002 Kjeller, Norway
| | - Elise Rundén-Pran
- NILU-Norwegian Institute for Air Research, Instituttveien 18, 2002 Kjeller, Norway
| | - Espen Mariussen
- NILU-Norwegian Institute for Air Research, Instituttveien 18, 2002 Kjeller, Norway
| | - Naouale El Yamani
- NILU-Norwegian Institute for Air Research, Instituttveien 18, 2002 Kjeller, Norway
| | - Wolfgang Unger
- Federal Institute for Material Testing and Research (BAM), Unter den Eichen 44-46, 12203 Berlin, Germany
| | - Jörg Radnik
- Federal Institute for Material Testing and Research (BAM), Unter den Eichen 44-46, 12203 Berlin, Germany
| | - Alexander Tropsha
- Eschelman School of Pharmacy, University of North Carolina at Chapel Hill, 100K Beard Hall, CB# 7568, Chapel Hill, NC 27955-7568, USA
| | - Yoram Cohen
- Samueli School Of Engineering, University of California, Los Angeles, 5531 Boelter Hall, Los Angeles, CA 90095, USA
| | - Jerzy Leszczynski
- Interdisciplinary Nanotoxicity Center, Jackson State University, 1400 J. R. Lynch Street, Jackson, MS 39217, USA
| | - Christine Ogilvie Hendren
- Center for Environmental Implications of Nanotechnologies, Duke University, 121 Hudson Hall, Durham, NC 27708-0287, USA
| | - Mark Wiesner
- Center for Environmental Implications of Nanotechnologies, Duke University, 121 Hudson Hall, Durham, NC 27708-0287, USA
| | - David Winkler
- La Trobe Institute of Molecular Sciences, La Trobe University, Plenty Rd & Kingsbury Dr, Bundoora, VIC 3086, Australia
- Monash Institute of Pharmaceutical Sciences, Monash University, Parkville 3052, Australia
- CSIRO Data61, Clayton 3168, Australia
- School of Pharmacy, University of Nottingham, Nottingham, UK
| | - Noriyuki Suzuki
- National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-0053, Japan
| | - Tae Hyun Yoon
- Department of Chemistry, College of Natural Sciences, Hanyang University, Seoul 04763, Republic of Korea
- Institute of Next Generation Material Design, Hanyang University, Seoul 04763, Republic of Korea
| | - Jang-Sik Choi
- Institute of Next Generation Material Design, Hanyang University, Seoul 04763, Republic of Korea
| | - Natasha Sanabria
- National Health Laboratory Services, 1 Modderfontein Rd, Sandringham, Johannesburg 2192, South Africa
| | - Mary Gulumian
- National Health Laboratory Services, 1 Modderfontein Rd, Sandringham, Johannesburg 2192, South Africa
- Haematology and Molecular Medicine, University of the Witwatersrand, Johannesburg, South Africa
| | - Iseult Lynch
- School of Geography, Earth and Environmental Sciences, University of Birmingham, B15 2TT Birmingham, UK
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Carnesecchi E, Toropov AA, Toropova AP, Kramer N, Svendsen C, Dorne JL, Benfenati E. Predicting acute contact toxicity of organic binary mixtures in honey bees (A. mellifera) through innovative QSAR models. Sci Total Environ 2020; 704:135302. [PMID: 31810690 DOI: 10.1016/j.scitotenv.2019.135302] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 10/29/2019] [Accepted: 10/29/2019] [Indexed: 06/10/2023]
Abstract
Pollinators such as honey bees are of considerable importance, because of the crucial pollination services they provide for food crops and wild plants. Since bees are exposed to a wide range of multiple chemicals "mixtures" both of anthropogenic (e.g. plant protection products) and natural origin (e.g. plant toxins), understanding their combined toxicity is critical. Although honey bees are employed worldwide as surrogate species for Apis and non-Apis bees in toxicity tests, it is practically unfeasible to perform in vivo tests for all mixtures of chemicals. Therefore, Quantitative Structure-Activity Relationships (QSAR) models can be developed using available data and can provide useful tools to predict such combined toxicity. Here, three different QSAR models within the CORAL software have been calibrated and validated for honey bees (A. mellifera) to predict the acute contact mixtures potency (LD50-mix), in two regression based-models, and the nature of combined toxicity (synergism / non-synergism) in a classification-based model. Experimental data on binary mixtures (n = 123) (LD50-mix) including dose response data (n = 97) and corresponding Toxic Unit values were retrieved from EFSA databases. The models were built using the principle of extraction of attributes from SMILES (or quasi-SMILES) while calculating so-called correlation weights for these attributes using Monte Carlo techniques. The two regression models were validated for their reliability and robustness (R2 = 0.89, CCC = 0.92, Q2 = 0.81; R2 = 0.87, CCC = 0.89, Q2 = 0.75). The classification model was validated using sensitivity (=0.86), specificity (=1), accuracy (=0.96), and Matthews correlation coefficient (MCC = 0.90) as qualitative statistical validation parameters. Results indicate that these QSAR models successfully predict acute contact toxicity of binary mixtures in honey bees and can support prioritisation of multiple chemicals of concerns. Data gaps and further development of QSAR models for honey bees are highlighted particularly for chronic and sub-lethal effects.
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Affiliation(s)
- Edoardo Carnesecchi
- Laboratory of Environmental Chemistry and Toxicology, Department of Environmental Health Sciences, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Via la Masa 19, 20156 Milan, Italy; Institute for Risk Assessment Sciences (IRAS), Utrecht University, PO Box 80177, 3508 TD Utrecht, The Netherlands.
| | - Andrey A Toropov
- Laboratory of Environmental Chemistry and Toxicology, Department of Environmental Health Sciences, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Via la Masa 19, 20156 Milan, Italy
| | - Alla P Toropova
- Laboratory of Environmental Chemistry and Toxicology, Department of Environmental Health Sciences, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Via la Masa 19, 20156 Milan, Italy
| | - Nynke Kramer
- Institute for Risk Assessment Sciences (IRAS), Utrecht University, PO Box 80177, 3508 TD Utrecht, The Netherlands
| | - Claus Svendsen
- Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Wallingford, Oxfordshire OX10 8BB, UK
| | - Jean Lou Dorne
- European Food Safety Authority (EFSA), Scientific Committee and Emerging Risks Unit, Via Carlo Magno 1A, 43126 Parma, Italy
| | - Emilio Benfenati
- Laboratory of Environmental Chemistry and Toxicology, Department of Environmental Health Sciences, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Via la Masa 19, 20156 Milan, Italy
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Carnesecchi E, Svendsen C, Lasagni S, Grech A, Quignot N, Amzal B, Toma C, Tosi S, Rortais A, Cortinas-Abrahantes J, Capri E, Kramer N, Benfenati E, Spurgeon D, Guillot G, Dorne JLCM. Investigating combined toxicity of binary mixtures in bees: Meta-analysis of laboratory tests, modelling, mechanistic basis and implications for risk assessment. Environ Int 2019; 133:105256. [PMID: 31683157 DOI: 10.1016/j.envint.2019.105256] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Revised: 10/03/2019] [Accepted: 10/09/2019] [Indexed: 05/21/2023]
Abstract
Bees are exposed to a wide range of multiple chemicals "chemical mixtures" from anthropogenic (e.g. plant protection products or veterinary products) or natural origin (e.g. mycotoxins, plant toxins). Quantifying the relative impact of multiple chemicals on bee health compared with other environmental stressors (e.g. varroa, viruses, and nutrition) has been identified as a priority to support the development of holistic risk assessment methods. Here, extensive literature searches and data collection of available laboratory studies on combined toxicity data for binary mixtures of pesticides and non-chemical stressors has been performed for honey bees (Apis mellifera), wild bees (Bombus spp.) and solitary bee species (Osmia spp.). From 957 screened publications, 14 publications provided 218 binary mixture toxicity data mostly for acute mortality (lethal dose: LD50) after contact exposure (61%), with fewer studies reporting chronic oral toxicity (20%) and acute oral LC50 values (19%). From the data collection, available dose response data for 92 binary mixtures were modelled using a Toxic Unit (TU) approach and the MIXTOX modelling tool to test assumptions of combined toxicity i.e. concentration addition (CA), and interactions (i.e. synergism, antagonism). The magnitude of interactions was quantified as the Model Deviation Ratio (MDR). The CA model applied to 17% of cases while synergism and antagonism were observed for 72% (MDR > 1.25) and 11% (MDR < 0.83) respectively. Most synergistic effects (55%) were observed as interactions between sterol-biosynthesis-inhibiting (SBI) fungicides and insecticide/acaricide. The mechanisms behind such synergistic effects of binary mixtures in bees are known to involve direct cytochrome P450 (CYP) inhibition, resulting in an increase in internal dose and toxicity of the binary mixture. Moreover, bees are known to have the lowest number of CYP copies and other detoxification enzymes in the insect kingdom. In the light of these findings, occurrence of these binary mixtures in relevant crops (frequency and concentrations) would need to be investigated. Addressing this exposure dimension remains critical to characterise the likelihood and plausibility of such interactions to occur under field realistic conditions. Finally, data gaps and further work for the development of risk assessment methods to assess multiple stressors in bees including chemicals and non-chemical stressors in bees are discussed.
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Affiliation(s)
- Edoardo Carnesecchi
- Institute for Risk Assessment Sciences (IRAS), Utrecht University, 3584 Utrecht, the Netherlands; Laboratory of Environmental Chemistry and Toxicology, Department of Environmental Health, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, via Mario Negri, 2, 20156 Milano, Italy
| | - Claus Svendsen
- Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford OX10 8BB, UK
| | | | | | | | | | - Cosimo Toma
- Laboratory of Environmental Chemistry and Toxicology, Department of Environmental Health, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, via Mario Negri, 2, 20156 Milano, Italy
| | - Simone Tosi
- Epidemiology Unit, European Union Reference Laboratory (EURL) for Honeybee Health, University Paris Est, French Agency for Food, Environmental and Occupational Health and Safety, Paris, France
| | - Agnes Rortais
- European Food Safety Authority (EFSA), Scientific Committee and Emerging Risks Unit, Parma, Italy
| | - Jose Cortinas-Abrahantes
- European Food Safety Authority (EFSA), Scientific Committee and Emerging Risks Unit, Parma, Italy
| | - Ettore Capri
- Università Cattolica del Sacro Cuore, Dipartimento di Scienze e Tecnologie Alimentari per una filiera agro-alimentare Sostenibile (DiSTAS), Piacenza, Italy
| | - Nynke Kramer
- Institute for Risk Assessment Sciences (IRAS), Utrecht University, 3584 Utrecht, the Netherlands
| | - Emilio Benfenati
- Laboratory of Environmental Chemistry and Toxicology, Department of Environmental Health, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, via Mario Negri, 2, 20156 Milano, Italy
| | - David Spurgeon
- Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford OX10 8BB, UK
| | - Gilles Guillot
- International Prevention Research Institute, Lyon, France
| | - Jean Lou Christian Michel Dorne
- European Food Safety Authority (EFSA), Scientific Committee and Emerging Risks Unit, Parma, Italy; School of Biosciences and Phenome Centre Birmingham, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK.
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Lahive E, Walton A, Horton AA, Spurgeon DJ, Svendsen C. Microplastic particles reduce reproduction in the terrestrial worm Enchytraeus crypticus in a soil exposure. Environ Pollut 2019; 255:113174. [PMID: 31634786 DOI: 10.1016/j.envpol.2019.113174] [Citation(s) in RCA: 91] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Revised: 09/03/2019] [Accepted: 09/03/2019] [Indexed: 05/21/2023]
Abstract
Terrestrial environments are subject to extensive pollution by plastics and, based on the slow degradation of plastics, are likely to act as long term sinks for microplastic debris. Currently the hazards of microplastics in soil and the potential impacts on soil organisms is poorly understood. Particularly the role of particle characteristics, such a size or polymer type, in dose-response relationships for microplastics is not known. The aim of this study was to assess the ingestion and toxicity of nylon (polyamide) particles, in three different size ranges, to Enchytraeus crypticus in a soil exposure. Effects were also compared with those of polyvinyl chloride (PVC) particles, in a single size range. Nylon particle ingestion was confirmed using fluorescence microscopy, with greatest ingestion for particles in the smallest size range (13-18 μm). To investigate how particle size affected survival and reproduction, E. crypticus were exposed to nylon particles in two well-defined size ranges (13-18 and 90-150 μm) and concentrations of 20, 50, 90 and 120 g/kg (2-12% w/w). An intermediate nylon size range (63-90 μm) and a larger sized PVC particle (106-150 μm), both at 90 g/kg, were also tested. Survival was not affected by either of the polymer types or sizes. Reproduction was significantly reduced, in a dose-dependent manner, by the nylon particles at high exposure concentrations (>90 g/kg). Smaller size ranges (13-18 μm) had a greater effect compared to larger size ranges (>63 μm), with a calculated EC50 for the 13-18 μm size range of 108 ± 8.5 g/kg. This greater hazard could be qualitatively linked with the ingestion of a greater number of smaller particles. This study highlights the potential for toxic effects of plastics in small size ranges to soil organisms at high exposure concentrations, providing understanding of the hazards microplastics may pose in the terrestrial environment.
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Affiliation(s)
- Elma Lahive
- Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, OX10 8BB, UK.
| | - Alexander Walton
- Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, OX10 8BB, UK
| | - Alice A Horton
- Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, OX10 8BB, UK
| | - David J Spurgeon
- Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, OX10 8BB, UK
| | - Claus Svendsen
- Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, OX10 8BB, UK
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Wamucho A, Unrine JM, Kieran TJ, Glenn TC, Schultz CL, Farman M, Svendsen C, Spurgeon DJ, Tsyusko OV. Genomic mutations after multigenerational exposure of Caenorhabditis elegans to pristine and sulfidized silver nanoparticles. Environ Pollut 2019; 254:113078. [PMID: 31479814 DOI: 10.1016/j.envpol.2019.113078] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Revised: 07/31/2019] [Accepted: 08/17/2019] [Indexed: 06/10/2023]
Abstract
Our previous study showed heritable reproductive toxicity in the nematode Caenorhabditis elegans after multigenerational exposure to AgNO3 and silver nanoparticles (Ag-NPs). The aim of this study was to determine whether such inheritable effects are correlated with induced germline mutations in C. elegans. Individual C. elegans lineages were exposed for 10 generations to equitoxic concentrations at EC30 of AgNO3, Ag-NPs, and sulfidized Ag-NPs (sAg-NPs), a predominant environmentally transformed product of pristine Ag-NPs. The mutations were detected via whole genome DNA sequencing approach by comparing F0 and F10 generations. An increase in the total number of variants, though not statistically significant, was observed for all Ag treatments and the variants were mainly contributed by single nucleotide polymorphisms (SNPs). This potentially contributed towards reproductive as well as growth toxicity shown previously after ten generations of exposure in every Ag treatment. However, despite Ag-NPs and AgNO3 inducing stronger reproductive toxicity than sAg-NPs, exposure to sAg-NPs resulted in higher mutation accumulation with significant increase in the number of transversions. Thus our results suggest that other mechanisms of inheritance, such as epigenetics, may be at play in Ag-NP- and AgNO3-induced multigenerational and transgenerational reproductive toxicity.
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Affiliation(s)
- Anye Wamucho
- Department of Plant and Soil Sciences, University of Kentucky, 1100 S. Limestone St., Lexington, KY 40546, USA; Department of Toxicology and Cancer Biology, University of Kentucky, 1095 V.A. Drive, 306 Health Science Research Building, Lexington, KY 40536, USA
| | - Jason M Unrine
- Department of Plant and Soil Sciences, University of Kentucky, 1100 S. Limestone St., Lexington, KY 40546, USA; Department of Toxicology and Cancer Biology, University of Kentucky, 1095 V.A. Drive, 306 Health Science Research Building, Lexington, KY 40536, USA
| | - Troy J Kieran
- Department of Genetics, University of Georgia, 120 Green St., GA 30602-7223, USA
| | - Travis C Glenn
- Department of Genetics, University of Georgia, 120 Green St., GA 30602-7223, USA
| | - Carolin L Schultz
- Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh-Gifford, Wallingford, Oxon OX10 8BB, UK; Department of Materials, Oxford University, Begbroke Science Park, Begbroke Hill, Yarnton, Oxford OX5 1PF, UK
| | - Mark Farman
- Department of Plant Pathology, 225 Plant Science Building, Lexington, KY 40546, USA
| | - Claus Svendsen
- Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh-Gifford, Wallingford, Oxon OX10 8BB, UK
| | - David J Spurgeon
- Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh-Gifford, Wallingford, Oxon OX10 8BB, UK
| | - Olga V Tsyusko
- Department of Plant and Soil Sciences, University of Kentucky, 1100 S. Limestone St., Lexington, KY 40546, USA; Department of Toxicology and Cancer Biology, University of Kentucky, 1095 V.A. Drive, 306 Health Science Research Building, Lexington, KY 40536, USA.
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Devos Y, Craig W, Devlin RH, Ippolito A, Leggatt RA, Romeis J, Shaw R, Svendsen C, Topping CJ. Using problem formulation for fit-for-purpose pre-market environmental risk assessments of regulated stressors. EFSA J 2019; 17:e170708. [PMID: 32626445 PMCID: PMC7055725 DOI: 10.2903/j.efsa.2019.e170708] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Pre‐market/prospective environmental risk assessments (ERAs) contribute to risk analyses performed to facilitate decisions about the market introduction of regulated stressors. Robust ERAs begin with an explicit problem formulation, which involves among other steps: (1) formally devising plausible pathways to harm that describe how the deployment of a regulated stressor could be harmful; (2) formulating risk hypotheses about the likelihood and severity of such events; (3) identifying the information that will be useful to test the risk hypotheses; and (4) developing a plan to acquire new data for hypothesis testing should tests with existing information be insufficient for decision‐making. Here, we apply problem formulation to the assessment of possible adverse effects of RNA interference‐based insecticidal genetically modified (GM) plants, GM growth hormone coho salmon, gene drive‐modified mosquitoes and classical biological weed control agents on non‐target organisms in a prospective manner, and of neonicotinoid insecticides on bees in a retrospective manner. In addition, specific considerations for the problem formulation for the ERA of nanomaterials and for landscape‐scale population‐level ERAs are given. We argue that applying problem formulation to ERA maximises the usefulness of ERA studies for decision‐making, through an iterative process, because: (1) harm is defined explicitly from the start; (2) the construction of risk hypotheses is guided by policy rather than an exhaustive attempt to address any possible differences; (3) existing information is used effectively; (4) new data are collected with a clear purpose; (5) risk is characterised against well‐defined criteria of hypothesis corroboration or falsification; and (6) risk assessment conclusions can be communicated clearly. However, problem formulation is still often hindered by the absence of clear policy goals and decision‐making criteria (e.g. definition of protection goals and what constitutes harm) that are needed to guide the interpretation of scientific information. We therefore advocate further dialogue between risk assessors and risk managers to clarify how ERAs can address policy goals and decision‐making criteria. Ideally, this dialogue should take place for all classes of regulated stressors, as this can promote alignment and consistency on the desired level of protection and maximum tolerable impacts across regulated stressors.
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Affiliation(s)
- Yann Devos
- GMO Unit European Food Safety Authority (EFSA) Italy
| | - Wendy Craig
- Biosafety Group International Centre for Genetic Engineering & Biotechnology (ICGEB) Italy
| | | | | | | | - Jörg Romeis
- Research Division Agroecology and Environment Agroscope Switzerland
| | - Richard Shaw
- Centre for Agriculture and Biosciences International (CABI) United Kingdom
| | - Claus Svendsen
- Ecotoxicology and Chemical Risk Group United Kingdom Research and Innovation Centre for Ecology and Hydrology (CEH) United Kingdom
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28
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Starnes D, Unrine J, Chen C, Lichtenberg S, Starnes C, Svendsen C, Kille P, Morgan J, Baddar ZE, Spear A, Bertsch P, Chen KC, Tsyusko O. Toxicogenomic responses of Caenorhabditis elegans to pristine and transformed zinc oxide nanoparticles. Environ Pollut 2019; 247:917-926. [PMID: 30823346 DOI: 10.1016/j.envpol.2019.01.077] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Revised: 12/20/2018] [Accepted: 01/21/2019] [Indexed: 06/09/2023]
Abstract
Manufactured nanoparticles (MNPs) undergo transformation immediately after they enter wastewater treatment streams and during their partitioning to sewage sludge, which is applied to agricultural soils in form of biosolids. We examined toxicogenomic responses of the model nematode Caenorhabditis elegans to pristine and transformed ZnO-MNPs (phosphatized pZnO- and sulfidized sZnO-MNPs). To account for the toxicity due to dissolved Zn, a ZnSO4 treatment was included. Transformation of ZnO-MNPs reduced their toxicity by nearly ten-fold, while there was almost no difference in the toxicity of pristine ZnO-MNPs and ZnSO4. This combined with the fact that far more dissolved Zn was released from ZnO- compared to pZnO- or sZnO-MNPs, suggests that dissolution of pristine ZnO-MNPs is one of the main drivers of their toxicity. Transcriptomic responses at the EC30 for reproduction resulted in a total of 1161 differentially expressed genes. Fifty percent of the genes differentially expressed in the ZnSO4 treatment, including the three metal responsive genes (mtl-1, mtl-2 and numr-1), were shared among all treatments, suggesting that responses to all forms of Zn could be partially attributed to dissolved Zn. However, the toxicity and transcriptomic responses in all MNP treatments cannot be fully explained by dissolved Zn. Two of the biological pathways identified, one essential for protein biosynthesis (Aminoacyl-tRNA biosynthesis) and another associated with detoxification (ABC transporters), were shared among pristine and one or both transformed ZnO-MNPs, but not ZnSO4. When comparing pristine and transformed ZnO-MNPs, 66% and 40% of genes were shared between ZnO-MNPs and sZnO-MNPs or pZnO-MNPs, respectively. This suggests greater similarity in transcriptomic responses between ZnO-MNPs and sZnO-MNPs, while toxicity mechanisms are more distinct for pZnO-MNPs, where 13 unique biological pathways were identified. Based on these pathways, the toxicity of pZnO-MNPs is likely to be associated with their adverse effect on digestion and metabolism.
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Affiliation(s)
- Daniel Starnes
- Department of Plant and Soil Sciences, University of Kentucky, Lexington, KY, USA; Department of Math and Computer Science, Belmont University, Nashville, TN, USA
| | - Jason Unrine
- Department of Plant and Soil Sciences, University of Kentucky, Lexington, KY, USA
| | - Chun Chen
- Department of Plant and Soil Sciences, University of Kentucky, Lexington, KY, USA; State Key Laboratory of Crop Stress Biology in Arid Areas, College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, 712100, PR China
| | - Stuart Lichtenberg
- Department of Plant and Soil Sciences, University of Kentucky, Lexington, KY, USA
| | - Catherine Starnes
- Department of Math and Computer Science, Belmont University, Nashville, TN, USA; Biostatics, Epidemiology, and Research Design, Center for Clinical and Translational Science, University of Kentucky, Lexington, KY, USA
| | - Claus Svendsen
- Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, Oxon, OX10 8BB, UK
| | - Peter Kille
- Organisms and Environment Division, Cardiff School of Biosciences, Cardiff University, Cardiff, CF10 3AT, UK
| | - John Morgan
- Organisms and Environment Division, Cardiff School of Biosciences, Cardiff University, Cardiff, CF10 3AT, UK
| | - Zeinah Elhaj Baddar
- Department of Plant and Soil Sciences, University of Kentucky, Lexington, KY, USA
| | - Amanda Spear
- Department of Toxicology and Cancer Biology, University of Kentucky, Lexington, KY, USA
| | - Paul Bertsch
- Division of Land and Water, CSIRO, Ecosciences Precinct, Brisbane, QLD, Australia
| | - Kuey Chu Chen
- Department of Pharmacology and Nutritional Sciences, College of Medicine, University of Kentucky, Lexington, KY, USA
| | - Olga Tsyusko
- Department of Plant and Soil Sciences, University of Kentucky, Lexington, KY, USA.
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More SJ, Bampidis V, Benford D, Bennekou SH, Bragard C, Halldorsson TI, Hernández-Jerez AF, Koutsoumanis K, Naegeli H, Schlatter JR, Silano V, Nielsen SS, Schrenk D, Turck D, Younes M, Benfenati E, Castle L, Cedergreen N, Hardy A, Laskowski R, Leblanc JC, Kortenkamp A, Ragas A, Posthuma L, Svendsen C, Solecki R, Testai E, Dujardin B, Kass GE, Manini P, Jeddi MZ, Dorne JLC, Hogstrand C. Guidance on harmonised methodologies for human health, animal health and ecological risk assessment of combined exposure to multiple chemicals. EFSA J 2019; 17:e05634. [PMID: 32626259 PMCID: PMC7009070 DOI: 10.2903/j.efsa.2019.5634] [Citation(s) in RCA: 152] [Impact Index Per Article: 30.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
This Guidance document describes harmonised risk assessment methodologies for combined exposure to multiple chemicals for all relevant areas within EFSA's remit, i.e. human health, animal health and ecological areas. First, a short review of the key terms, scientific basis for combined exposure risk assessment and approaches to assessing (eco)toxicology is given, including existing frameworks for these risk assessments. This background was evaluated, resulting in a harmonised framework for risk assessment of combined exposure to multiple chemicals. The framework is based on the risk assessment steps (problem formulation, exposure assessment, hazard identification and characterisation, and risk characterisation including uncertainty analysis), with tiered and stepwise approaches for both whole mixture approaches and component‐based approaches. Specific considerations are given to component‐based approaches including the grouping of chemicals into common assessment groups, the use of dose addition as a default assumption, approaches to integrate evidence of interactions and the refinement of assessment groups. Case studies are annexed in this guidance document to explore the feasibility and spectrum of applications of the proposed methods and approaches for human and animal health and ecological risk assessment. The Scientific Committee considers that this Guidance is fit for purpose for risk assessments of combined exposure to multiple chemicals and should be applied in all relevant areas of EFSA's work. Future work and research are recommended. This publication is linked to the following EFSA Supporting Publications article: http://onlinelibrary.wiley.com/doi/10.2903/sp.efsa.2019.EN-1589/full, http://onlinelibrary.wiley.com/doi/10.2903/sp.efsa.2019.EN-1602/full
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30
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Horton AA, Vijver MG, Lahive E, Spurgeon DJ, Svendsen C, Heutink R, van Bodegom PM, Baas J. Acute toxicity of organic pesticides to Daphnia magna is unchanged by co-exposure to polystyrene microplastics. Ecotoxicol Environ Saf 2018; 166:26-34. [PMID: 30243044 DOI: 10.1016/j.ecoenv.2018.09.052] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 09/07/2018] [Accepted: 09/10/2018] [Indexed: 06/08/2023]
Abstract
Daphnia magna were exposed to two pesticides in the presence or absence of microplastics (300 000 particles ml-1 1 µm polystyrene spheres) and to microplastics alone. The pesticides were dimethoate, an organophosphate insecticide with a low log Kow, and deltamethrin, a pyrethroid insecticide with a high log Kow. Daphnia were exposed to a nominal concentration range of 0.15, 0.31, 0.63, 1.25, 2.5, 5 mg l-1 dimethoate and 0.016, 0.08, 0.4, 2, 5 and 10 µg l-1 deltamethrin. Exposure to polystyrene microplastics alone showed no effects on Daphnia magna survival and mobility over a 72 h exposure. In the dimethoate exposures, mobility and survival were both affected from a concentration of 1.25 mg l-1, with effects were seen on mobility from 28 h and survival from 48 h, with greater effects seen with increasing concentration and exposure time. In deltamethrin exposures, survival was affected from a concentration of 0.4 µg l-1 and mobility from a concentration of 0.08 µg l-1. Effects of deltamethrin on mobility were seen from 5 h and on survival from 28 h, with greater effects on survival and mobility seen with increasing concentration and exposure time. Contrary to expectations, pesticide toxicity to Daphnia magna was not affected by the presence of microplastics, regardless of chemical binding affinity (log Kow). This therefore suggests that polystyrene microplastics are unlikely to act as a significant sink, nor as a vector for increased uptake of pesticides by aquatic organisms. CAPSULE: Polystyrene microplastics are unlikely to act as vector for increased uptake of pesticides by aquatic organisms.
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Affiliation(s)
- Alice A Horton
- Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Wallingford Oxfordshire OX10 8BB, UK; Institute of Environmental Sciences, University of Leiden, P.O. Box 9518, 2300 RA Leiden, the Netherlands.
| | - Martina G Vijver
- Institute of Environmental Sciences, University of Leiden, P.O. Box 9518, 2300 RA Leiden, the Netherlands
| | - Elma Lahive
- Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Wallingford Oxfordshire OX10 8BB, UK
| | - David J Spurgeon
- Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Wallingford Oxfordshire OX10 8BB, UK
| | - Claus Svendsen
- Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Wallingford Oxfordshire OX10 8BB, UK
| | - Roel Heutink
- Institute of Environmental Sciences, University of Leiden, P.O. Box 9518, 2300 RA Leiden, the Netherlands
| | - Peter M van Bodegom
- Institute of Environmental Sciences, University of Leiden, P.O. Box 9518, 2300 RA Leiden, the Netherlands
| | - Jan Baas
- Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Wallingford Oxfordshire OX10 8BB, UK; Institute of Environmental Sciences, University of Leiden, P.O. Box 9518, 2300 RA Leiden, the Netherlands
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Schultz CL, Lahive E, Lawlor A, Crossley A, Puntes V, Unrine JM, Svendsen C, Spurgeon DJ. Influence of soil porewater properties on the fate and toxicity of silver nanoparticles to Caenorhabditis elegans. Environ Toxicol Chem 2018; 37:2609-2618. [PMID: 30003578 DOI: 10.1002/etc.4220] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Revised: 03/30/2018] [Accepted: 06/29/2018] [Indexed: 06/08/2023]
Abstract
Engineered nanoparticles (NPs) entering the environment are subject to various transformations that in turn influence how particles are presented to, and taken up by, organisms. To understand the effect of soil properties on the toxicity of nanosilver to Caenorhabditis elegans, toxicity assays were performed in porewater extracts from natural soils with varying organic matter content and pH using 3-8 nm unfunctionalized silver (Ag 3-8Unf), 52-nm polyvinylpyrrolidone (PVP)-coated Ag NPs (Ag 52PVP), and AgNO3 as ionic Ag. Effects on NP agglomeration and stability were investigated using ultraviolet-visible (UV-vis) spectroscopy and asymmetric flow field-flow fractionation (AF4); Ag+ showed greater overall toxicity than nanosilver, with little difference between the NP types. Increasing soil organic matter content significantly decreased the toxicity of Ag 3-8Unf, whereas it increased that of AgNO3 . The toxicity of all Ag treatments significantly decreased with increasing porewater pH. Dissolution of both NPs in the porewater extracts was too low to have contributed to their observed toxic effects. The UV-vis spectroscopy revealed low levels of agglomeration/aggregation independent of soil properties for Ag 3-8Unf, whereas higher organic matter as well as low pH appeared to stabilize Ag 52PVP. Overall, both soil organic matter content and pH affected NP fate as well as toxicity to C. elegans; however, there appears to be no clear connection between the measured particle characteristics and their effect. Environ Toxicol Chem 2018;37:2609-2618. © 2018 SETAC.
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Affiliation(s)
- Carolin L Schultz
- Centre for Ecology and Hydrology, Wallingford, Oxon, United Kingdom
- Centre for Ecology and Hydrology, Lancaster Environment Centre, Bailrigg Lancaster, United Kingdom
| | - Elma Lahive
- Centre for Ecology and Hydrology, Wallingford, Oxon, United Kingdom
| | - Alan Lawlor
- Centre for Ecology and Hydrology, Lancaster Environment Centre, Bailrigg Lancaster, United Kingdom
| | - Alison Crossley
- Department of Materials, Oxford University, Oxford, Oxfordshire, United Kingdom
| | - Victor Puntes
- Catalan Institute for Nanoscience and Nanotechnology, Barcelona, Spain
- Spanish National Research Council, Madrid, Spain
- Barcelona Institute of Science and Technology, Bellaterra, Barcelona, Spain
- Vall d'Hebron Research Institute, Barcelona, Spain
- Catalan Institution for Research and Advanced Studies, Barcelona, Spain
| | - Jason M Unrine
- Department of Plant and Soil Sciences, University of Kentucky, Lexington, Kentucky, USA
| | - Claus Svendsen
- Centre for Ecology and Hydrology, Wallingford, Oxon, United Kingdom
| | - David J Spurgeon
- Centre for Ecology and Hydrology, Wallingford, Oxon, United Kingdom
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Mugova F, Read DS, Riding MJ, Martin FL, Tyne W, Svendsen C, Spurgeon D. Phenotypic responses in Caenorhabditis elegans following chronic low-level exposures to inorganic and organic compounds. Environ Toxicol Chem 2018; 37:920-930. [PMID: 29095522 DOI: 10.1002/etc.4026] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Revised: 03/26/2017] [Accepted: 10/31/2017] [Indexed: 06/07/2023]
Abstract
Responses of organisms to sublethal exposure of environmental stressors can be difficult to detect. We investigated phenotypic changes in the tissue of Caenorhabditis elegans via Raman spectroscopy, as well as survival and reproductive output when exposed to chronic low doses of metals (copper, zinc, or silver), an herbicide (diuron), and a pesticide (imidacloprid). Raman spectroscopy measures changes in phenotype by providing information about the molecular composition and relative abundance of biomolecules. Multivariate analysis was used to evaluate the significance of treatment phenotype segregation plots compared with controls. Dose-dependent responses were observed for copper, zinc, silver, and diuron, whereas imidacloprid exposure resulted in a small response over the tested concentrations. Concentration-dependent shifts in nematode biomolecular phenotype were observed for copper. Despite having a dose-dependent reproductive response, silver, diuron, and imidacloprid produced inconsistent biological phenotype patterns. In contrast, there was a clear stepwise change between low concentrations (0.00625-0.5 mg/L) and higher concentration (1-2 mg/L) of ionic zinc. The findings demonstrate that measuring phenotypic responses via Raman spectroscopy can provide insights into the biomolecular mechanisms of toxicity. Despite the lack of consistency between survival and Raman-measured phenotypic changes, the results support the effectiveness of Raman spectroscopy and multivariate analysis to detect sublethal responses of chemicals in whole organisms and to identify toxic effect thresholds. Environ Toxicol Chem 2018;37:920-930. © 2017 SETAC.
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Affiliation(s)
- Fidelis Mugova
- Centre for Biophotonics, Lancaster University, Bailrigg, Lancaster, United Kingdom
- Centre for Ecology & Hydrology, Crowmarsh Gifford, Wallingford, United Kingdom
| | - Daniel S Read
- Centre for Ecology & Hydrology, Crowmarsh Gifford, Wallingford, United Kingdom
| | - Matthew J Riding
- Centre for Biophotonics, Lancaster University, Bailrigg, Lancaster, United Kingdom
| | - Francis L Martin
- Centre for Biophotonics, Lancaster University, Bailrigg, Lancaster, United Kingdom
- School of Pharmacy and Biomedical Sciences, University of Central Lancashire, Preston, United Kingdom
| | - William Tyne
- Microbiology and Infection Unit, Warwick Medical School, University of Warwick, Coventry, United Kingdom
| | - Claus Svendsen
- Centre for Ecology & Hydrology, Crowmarsh Gifford, Wallingford, United Kingdom
| | - David Spurgeon
- Centre for Ecology & Hydrology, Crowmarsh Gifford, Wallingford, United Kingdom
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Schultz CL, Wamucho A, Tsyusko OV, Unrine JM, Crossley A, Svendsen C, Spurgeon DJ. Multigenerational exposure to silver ions and silver nanoparticles reveals heightened sensitivity and epigenetic memory in Caenorhabditis elegans. Proc Biol Sci 2017; 283:rspb.2015.2911. [PMID: 27306046 DOI: 10.1098/rspb.2015.2911] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Accepted: 05/17/2016] [Indexed: 11/12/2022] Open
Abstract
The effects from multigenerational exposures to engineered nanoparticles (ENPs) in their pristine and transformed states are currently unknown despite such exposures being an increasingly common scenario in natural environments. Here, we examine how exposure over 10 generations affects the sensitivity of the nematode Caenorhabditis elegans to pristine and sulfidized Ag ENPs and AgNO3 We also include populations that were initially exposed over six generations but kept unexposed for subsequent four generations to allow recovery from exposure. Toxicity of the different silver forms decreased in the order AgNO3, Ag ENPs and Ag2S ENPs. Continuous exposure to Ag ENPs and AgNO3 caused pronounced sensitization (approx. 10-fold) in the F2 generation, which was sustained until F10. This sensitization was less pronounced for Ag2S ENP exposures, indicating different toxicity mechanisms. Subtle changes in size and lifespan were also measured. In the recovery populations, the sensitivity to Ag ENPs and AgNO3 resulting from the initial multigenerational exposure persisted. Their response sensitivity for all endpoints was most closely related to the last ancestral exposed generation (F5), rather than unexposed controls. The mechanisms of transgenerational transfer of sensitivity are probably organized through the epigenome, and we encourage others to investigate such effects as a priority for mechanistic toxicology.
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Affiliation(s)
- Carolin L Schultz
- Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, Oxon OX10 8BB, UK Department of Materials, Oxford University, Begbroke Science Park, Begbroke Hill, Yarnton, Oxford OX5 1PF, UK
| | - Anye Wamucho
- Department of Plant and Soil Sciences, University of Kentucky, 1100 S. Limestone St., Lexington, KY 40546, USA
| | - Olga V Tsyusko
- Department of Plant and Soil Sciences, University of Kentucky, 1100 S. Limestone St., Lexington, KY 40546, USA
| | - Jason M Unrine
- Department of Plant and Soil Sciences, University of Kentucky, 1100 S. Limestone St., Lexington, KY 40546, USA
| | - Alison Crossley
- Department of Materials, Oxford University, Begbroke Science Park, Begbroke Hill, Yarnton, Oxford OX5 1PF, UK
| | - Claus Svendsen
- Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, Oxon OX10 8BB, UK
| | - David J Spurgeon
- Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, Oxon OX10 8BB, UK
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Sekine R, Moore KL, Matzke M, Vallotton P, Jiang H, Hughes GM, Kirby JK, Donner E, Grovenor CRM, Svendsen C, Lombi E. Complementary Imaging of Silver Nanoparticle Interactions with Green Algae: Dark-Field Microscopy, Electron Microscopy, and Nanoscale Secondary Ion Mass Spectrometry. ACS Nano 2017; 11:10894-10902. [PMID: 29061049 DOI: 10.1021/acsnano.7b04556] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Increasing consumer use of engineered nanomaterials has led to significantly increased efforts to understand their potential impact on the environment and living organisms. Currently, no individual technique can provide all the necessary information such as their size, distribution, and chemistry in complex biological systems. Consequently, there is a need to develop complementary instrumental imaging approaches that provide enhanced understanding of these "bio-nano" interactions to overcome the limitations of individual techniques. Here we used a multimodal imaging approach incorporating dark-field light microscopy, high-resolution electron microscopy, and nanoscale secondary ion mass spectrometry (NanoSIMS). The aim was to gain insight into the bio-nano interactions of surface-functionalized silver nanoparticles (Ag-NPs) with the green algae Raphidocelis subcapitata, by combining the fidelity, spatial resolution, and elemental identification offered by the three techniques, respectively. Each technique revealed that Ag-NPs interact with the green algae with a dependence on the size (10 nm vs 60 nm) and surface functionality (tannic acid vs branched polyethylenimine, bPEI) of the NPs. Dark-field light microscopy revealed the presence of strong light scatterers on the algal cell surface, and SEM imaging confirmed their nanoparticulate nature and localization at nanoscale resolution. NanoSIMS imaging confirmed their chemical identity as Ag, with the majority of signal concentrated at the cell surface. Furthermore, SEM and NanoSIMS provided evidence of 10 nm bPEI Ag-NP internalization at higher concentrations (40 μg/L), correlating with the highest toxicity observed from these NPs. This multimodal approach thus demonstrated an effective approach to complement dose-response studies in nano-(eco)-toxicological investigations.
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Affiliation(s)
- Ryo Sekine
- Future Industries Institute, University of South Australia , Building X, Mawson Lakes Campus, Adelaide, SA 5095, Australia
- Centre for Ecology and Hydrology , Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, Oxfordshire OX10 8BB, United Kingdom
| | - Katie L Moore
- Department of Materials, The University of Oxford , Parks Road, Oxford, OX1 3PH, United Kingdom
- School of Materials, The University of Manchester , Oxford Road, Manchester, M13 9PL, United Kingdom
| | - Marianne Matzke
- Centre for Ecology and Hydrology , Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, Oxfordshire OX10 8BB, United Kingdom
| | - Pascal Vallotton
- Institute für Biochemie, ETH Zurich , Otto-Stern-Weg 3, 8093 Zürich, Switzerland
- Centre for Microscopy, Characterisation and Analysis, University of Western Australia , 35 Stirling Highway, Crawley, WA 6009, Australia
| | - Haibo Jiang
- Department of Materials, The University of Oxford , Parks Road, Oxford, OX1 3PH, United Kingdom
- CSIRO Land and Water, Environmental Contaminant Mitigation and Biotechnology Program , Waite Campus, Waite Road, Perth, SA 5064, Australia
| | - Gareth M Hughes
- Department of Materials, The University of Oxford , Parks Road, Oxford, OX1 3PH, United Kingdom
| | - Jason K Kirby
- CSIRO Land and Water, Environmental Contaminant Mitigation and Biotechnology Program , Waite Campus, Waite Road, Perth, SA 5064, Australia
| | - Erica Donner
- Future Industries Institute, University of South Australia , Building X, Mawson Lakes Campus, Adelaide, SA 5095, Australia
| | - Chris R M Grovenor
- Department of Materials, The University of Oxford , Parks Road, Oxford, OX1 3PH, United Kingdom
| | - Claus Svendsen
- Centre for Ecology and Hydrology , Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, Oxfordshire OX10 8BB, United Kingdom
| | - Enzo Lombi
- Future Industries Institute, University of South Australia , Building X, Mawson Lakes Campus, Adelaide, SA 5095, Australia
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Laycock A, Romero-Freire A, Najorka J, Svendsen C, van Gestel CAM, Rehkämper M. Novel Multi-isotope Tracer Approach To Test ZnO Nanoparticle and Soluble Zn Bioavailability in Joint Soil Exposures. Environ Sci Technol 2017; 51:12756-12763. [PMID: 29017317 DOI: 10.1021/acs.est.7b02944] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Here we use two enriched stable isotopes, 68Znen and 64Znen (>99%), to prepare 68ZnO nanoparticles (NPs) and soluble 64ZnCl2. The standard LUFA 2.2 test soil was dosed with 68ZnO NPs and soluble 64ZnCl2 to 5 mg kg-1 each, plus between 0 and 95 mg kg-1 of soluble ZnCl2 with a natural isotope composition. After 0, 1, 3, 6, and 12 months of soil incubation, earthworms (Eisenia andrei) were introduced for 72 h exposures. Analyses of soils, pore waters, and earthworm tissues using multiple collector inductively coupled plasma mass spectrometry allowed the simultaneous measurement of the diagnostic 68Zn/66Zn, 64Zn/66Zn, and 68Zn/64Zn ratios, from which the three different isotopic forms of Zn were quantified. Eisenia andrei was able to regulate Zn body concentrations with no difference observed between the different total dosing concentrations. The accumulation of labeled Zn by the earthworms showed a direct relationship with the proportion of labeled to total Zn in the pore water, which increased with longer soil incubation times and decreasing soil pH. The 68Znen/64Znen ratios determined for earthworms (1.09 ± 0.04), soils (1.09 ± 0.02), and pore waters (1.08 ± 0.02) indicate indistinguishable environmental distribution and uptake of the Zn forms, most likely due to rapid dissolution of the ZnO NPs.
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Affiliation(s)
- Adam Laycock
- Department of Earth Science & Engineering, Imperial College London , London SW7 2AZ, United Kingdom
- Department of Environmental Geosciences, University of Vienna , Vienna 1090, Austria
| | - Ana Romero-Freire
- Department of Soil Science, University of Granada , Avd. Fuente Nueva, 18002 Granada, Spain
- Laboratoire Interdisciplinaire des Environnements Continentaux, UMR 7360 CNRS, Université de Lorraine , Campus Bridoux, Bâtiment IBISE, 8 rue du Général Delestraint, 57070 Metz, France
| | - Jens Najorka
- Core Research Laboratories, Natural History Museum , Cromwell Road, London SW7 5BD, United Kingdom
| | - Claus Svendsen
- Centre for Ecology and Hydrology , Benson Lane, Wallingford, Oxford OX10 8BB, United Kingdom
| | - Cornelis A M van Gestel
- Department of Ecological Science, Faculty of Science, Vrije Universiteit , De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands
| | - Mark Rehkämper
- Department of Earth Science & Engineering, Imperial College London , London SW7 2AZ, United Kingdom
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Robinson A, Hesketh H, Lahive E, Horton AA, Svendsen C, Rortais A, Dorne JL, Baas J, Heard MS, Spurgeon DJ. Comparing bee species responses to chemical mixtures: Common response patterns? PLoS One 2017. [PMID: 28640811 PMCID: PMC5480836 DOI: 10.1371/journal.pone.0176289] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
Pollinators in agricultural landscapes can be exposed to mixtures of pesticides and environmental pollutants. Existing mixture toxicity modelling approaches, such as the models of concentration addition and independent action and the mechanistic DEBtox framework have been previously shown as valuable tools for understanding and ultimately predicting joint toxicity. Here we apply these mixture models to investigate the potential to interpret the effects of semi-chronic binary mixture exposure for three bee species: Apis mellifera, Bombus terrestris and Osmia bicornis within potentiation and mixture toxicity experiments. In the potentiation studies, the effect of the insecticide dimethoate with added propiconazole fungicide and neonicotinoid insecticide clothianidin with added tau-fluvalinate pyrethroid acaricide showed no difference in toxicity compared to the single chemical alone. Clothianidin toxicity showed a small scale, but temporally conserved increase in exposure conducted in the presence of propiconazole, particularly for B. terrestris and O. bicornis, the latter showing a near three-fold increase in clothianidin toxicity in the presence of propiconazole. In the mixture toxicity studies, the dominant response patterns were of additivity, however, binary mixtures of clothianidin and dimethoate in A. mellifera, B. terrestris and male O. bicornis there was evidence of a predominant antagonistic interaction. Given the ubiquitous nature of exposures to multiple chemicals, there is an urgent need to consider mixture effects in pollinator risk assessments. Our analyses suggest that current models, particularly those that utilise time-series data, such as DEBtox, can be used to identify additivity as the dominant response pattern and also those examples of interactions, even when small-scale, that may need to be taken into account during risk assessment.
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Affiliation(s)
- Alex Robinson
- Centre for Ecology and Hydrology, Wallingford, Oxon, United Kingdom
| | - Helen Hesketh
- Centre for Ecology and Hydrology, Wallingford, Oxon, United Kingdom
| | - Elma Lahive
- Centre for Ecology and Hydrology, Wallingford, Oxon, United Kingdom
| | - Alice A. Horton
- Centre for Ecology and Hydrology, Wallingford, Oxon, United Kingdom
| | - Claus Svendsen
- Centre for Ecology and Hydrology, Wallingford, Oxon, United Kingdom
| | | | | | - Jan Baas
- Centre for Ecology and Hydrology, Wallingford, Oxon, United Kingdom
| | - Matthew S. Heard
- Centre for Ecology and Hydrology, Wallingford, Oxon, United Kingdom
| | - David J. Spurgeon
- Centre for Ecology and Hydrology, Wallingford, Oxon, United Kingdom
- * E-mail:
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Horton AA, Walton A, Spurgeon DJ, Lahive E, Svendsen C. Microplastics in freshwater and terrestrial environments: Evaluating the current understanding to identify the knowledge gaps and future research priorities. Sci Total Environ 2017; 586:127-141. [PMID: 28169032 DOI: 10.1016/j.scitotenv.2017.01.190] [Citation(s) in RCA: 1331] [Impact Index Per Article: 190.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Revised: 01/24/2017] [Accepted: 01/27/2017] [Indexed: 04/14/2023]
Abstract
Plastic debris is an environmentally persistent and complex contaminant of increasing concern. Understanding the sources, abundance and composition of microplastics present in the environment is a huge challenge due to the fact that hundreds of millions of tonnes of plastic material is manufactured for societal use annually, some of which is released to the environment. The majority of microplastics research to date has focussed on the marine environment. Although freshwater and terrestrial environments are recognised as origins and transport pathways of plastics to the oceans, there is still a comparative lack of knowledge about these environmental compartments. It is highly likely that microplastics will accumulate within continental environments, especially in areas of high anthropogenic influence such as agricultural or urban areas. This review critically evaluates the current literature on the presence, behaviour and fate of microplastics in freshwater and terrestrial environments and, where appropriate, also draws on relevant studies from other fields including nanotechnology, agriculture and waste management. Furthermore, we evaluate the relevant biological and chemical information from the substantial body of marine microplastic literature, determining the applicability and comparability of this data to freshwater and terrestrial systems. With the evidence presented, the authors have set out the current state of the knowledge, and identified the key gaps. These include the volume and composition of microplastics entering the environment, behaviour and fate of microplastics under a variety of environmental conditions and how characteristics of microplastics influence their toxicity. Given the technical challenges surrounding microplastics research, it is especially important that future studies develop standardised techniques to allow for comparability of data. The identification of these research needs will help inform the design of future studies, to determine both the extent and potential ecological impacts of microplastic pollution in freshwater and terrestrial environments.
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Affiliation(s)
- Alice A Horton
- Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Wallingford, Oxfordshire OX10 8BB, UK; Institute of Environmental Sciences, University of Leiden, P.O. Box 9518, 2300 RA Leiden, The Netherlands.
| | - Alexander Walton
- Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Wallingford, Oxfordshire OX10 8BB, UK; School of Biosciences, University of Exeter, Geoffrey Pope Building, Stocker Road, Exeter EX4 4QD, UK
| | - David J Spurgeon
- Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Wallingford, Oxfordshire OX10 8BB, UK
| | - Elma Lahive
- Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Wallingford, Oxfordshire OX10 8BB, UK
| | - Claus Svendsen
- Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Wallingford, Oxfordshire OX10 8BB, UK
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Heard MS, Baas J, Dorne JL, Lahive E, Robinson AG, Rortais A, Spurgeon DJ, Svendsen C, Hesketh H. Comparative toxicity of pesticides and environmental contaminants in bees: Are honey bees a useful proxy for wild bee species? Sci Total Environ 2017; 578:357-365. [PMID: 27847190 DOI: 10.1016/j.scitotenv.2016.10.180] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Revised: 10/21/2016] [Accepted: 10/23/2016] [Indexed: 06/06/2023]
Abstract
Threats to wild and managed insect pollinators in Europe are cause for both ecological and socio-economic concern. Multiple anthropogenic pressures may be exacerbating pollinator declines. One key pressure is exposure to chemicals including pesticides and other contaminants. Historically the honey bee (Apis mellifera spp.) has been used as an 'indicator' species for 'standard' ecotoxicological testing but it has been suggested that it is not always a good proxy for other types of eusocial and solitary bees because of species differences in autecology and sensitivity to various stressors. We developed a common toxicity test system to conduct acute and chronic exposures of up to 240h of similar doses of seven chemicals, targeting different metabolic pathways, on three bee species (Apis mellifera spp., Bombus terrestris and Osmia bicornis). We compared the relative sensitivity between species in terms of potency between the chemicals and the influence of exposure time on toxicity. While there were significant interspecific differences that varied through time, overall the magnitude of these differences (in terms of treatment effect ratios) was generally comparable (<2 fold) although there were some large divergences from this pattern. Our results suggest that A. mellifera spp. could be used as a proxy for other bee species provided a reasonable assessment factor is used to cover interspecific variation. Perhaps more importantly our results show significant and large time dependency of toxicity across all three tested species that greatly exceeds species differences (>25 fold within test). These are rarely considered in standard regulatory testing but may have severe environmental consequences, especially when coupled with the likelihood of differential species exposures in the wild. These insights indicate that further work is required to understand how differences in toxicokinetics vary between species and mixtures of chemicals.
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Affiliation(s)
- Matthew S Heard
- NERC Centre for Ecology & Hydrology, Maclean Building, Crowmarsh Gifford, Wallingford, Oxfordshire OX10 8BB, UK.
| | - Jan Baas
- NERC Centre for Ecology & Hydrology, Maclean Building, Crowmarsh Gifford, Wallingford, Oxfordshire OX10 8BB, UK
| | - Jean-Lou Dorne
- European Food Safety Authority, Via Carlo Magno, 1A, 43100 Parma PR, Italy
| | - Elma Lahive
- NERC Centre for Ecology & Hydrology, Maclean Building, Crowmarsh Gifford, Wallingford, Oxfordshire OX10 8BB, UK
| | - Alexander G Robinson
- NERC Centre for Ecology & Hydrology, Maclean Building, Crowmarsh Gifford, Wallingford, Oxfordshire OX10 8BB, UK
| | - Agnes Rortais
- European Food Safety Authority, Via Carlo Magno, 1A, 43100 Parma PR, Italy
| | - David J Spurgeon
- NERC Centre for Ecology & Hydrology, Maclean Building, Crowmarsh Gifford, Wallingford, Oxfordshire OX10 8BB, UK
| | - Claus Svendsen
- NERC Centre for Ecology & Hydrology, Maclean Building, Crowmarsh Gifford, Wallingford, Oxfordshire OX10 8BB, UK
| | - Helen Hesketh
- NERC Centre for Ecology & Hydrology, Maclean Building, Crowmarsh Gifford, Wallingford, Oxfordshire OX10 8BB, UK
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Horton AA, Svendsen C, Williams RJ, Spurgeon DJ, Lahive E. Large microplastic particles in sediments of tributaries of the River Thames, UK - Abundance, sources and methods for effective quantification. Mar Pollut Bull 2017; 114:218-226. [PMID: 27692488 DOI: 10.1016/j.marpolbul.2016.09.004] [Citation(s) in RCA: 401] [Impact Index Per Article: 57.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Revised: 09/01/2016] [Accepted: 09/02/2016] [Indexed: 05/18/2023]
Abstract
UNLABELLED Sewage effluent input and population were chosen as predictors of microplastic presence in sediments at four sites in the River Thames basin (UK). Large microplastic particles (1mm-4mm) were extracted using a stepwise approach to include visual extraction, flotation and identification using Raman spectroscopy. Microplastics were found at all four sites. One site had significantly higher numbers of microplastics than other sites, average 66 particles 100g-1, 91% of which were fragments. This site was downstream of a storm drain outfall receiving urban runoff; many of the fragments at this site were determined to be derived of thermoplastic road-surface marking paints. At the remaining three sites, fibres were the dominant particle type. The most common polymers identified included polypropylene, polyester and polyarylsulphone. This study describes two major new findings: presence of microplastic particles in a UK freshwater system and identification of road marking paints as a source of microplastics. CAPSULE This study is the first to quantify microplastics of any size in river sediments in the UK and links their presence to terrestrial sources including sewage and road marking paints.
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Affiliation(s)
- Alice A Horton
- Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford OX10 8BB, UK.
| | - Claus Svendsen
- Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford OX10 8BB, UK
| | - Richard J Williams
- Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford OX10 8BB, UK
| | - David J Spurgeon
- Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford OX10 8BB, UK
| | - Elma Lahive
- Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford OX10 8BB, UK
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40
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Hesketh H, Lahive E, Horton AA, Robinson AG, Svendsen C, Rortais A, Dorne JL, Baas J, Spurgeon DJ, Heard MS. Extending standard testing period in honeybees to predict lifespan impacts of pesticides and heavy metals using dynamic energy budget modelling. Sci Rep 2016; 6:37655. [PMID: 27995934 PMCID: PMC5171639 DOI: 10.1038/srep37655] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Accepted: 10/27/2016] [Indexed: 11/09/2022] Open
Abstract
Concern over reported honeybee (Apis mellifera spp.) losses has highlighted chemical exposure as a risk. Current laboratory oral toxicity tests in A. mellifera spp. use short-term, maximum 96 hour, exposures which may not necessarily account for chronic and cumulative toxicity. Here, we use extended 240 hour (10 day) exposures to examine seven agrochemicals and trace environmental pollutant toxicities for adult honeybees. Data were used to parameterise a dynamic energy budget model (DEBtox) to further examine potential survival effects up to 30 day and 90 day summer and winter worker lifespans. Honeybees were most sensitive to insecticides (clothianidin > dimethoate ≫ tau-fluvalinate), then trace metals/metalloids (cadmium, arsenic), followed by the fungicide propiconazole and herbicide 2,4-dichlorophenoxyacetic acid (2,4-D). LC50s calculated from DEBtox parameters indicated a 27 fold change comparing exposure from 48 to 720 hours (summer worker lifespan) for cadmium, as the most time-dependent chemical as driven by slow toxicokinetics. Clothianidin and dimethoate exhibited more rapid toxicokinetics with 48 to 720 hour LC50s changes of <4 fold. As effects from long-term exposure may exceed those measured in short-term tests, future regulatory tests should extend to 96 hours as standard, with extension to 240 hour exposures further improving realism.
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Affiliation(s)
- H Hesketh
- Centre for Ecology &Hydrology, MacLean Building, Benson Lane, Wallingford, Oxfordshire, OX10 8BB, UK
| | - E Lahive
- Centre for Ecology &Hydrology, MacLean Building, Benson Lane, Wallingford, Oxfordshire, OX10 8BB, UK
| | - A A Horton
- Centre for Ecology &Hydrology, MacLean Building, Benson Lane, Wallingford, Oxfordshire, OX10 8BB, UK
| | - A G Robinson
- Centre for Ecology &Hydrology, MacLean Building, Benson Lane, Wallingford, Oxfordshire, OX10 8BB, UK
| | - C Svendsen
- Centre for Ecology &Hydrology, MacLean Building, Benson Lane, Wallingford, Oxfordshire, OX10 8BB, UK
| | - A Rortais
- European Food Safety Authority, 1a, Via Carlo Magno, 1A, 43126 Parma PR, Italy
| | - J-L Dorne
- European Food Safety Authority, 1a, Via Carlo Magno, 1A, 43126 Parma PR, Italy
| | - J Baas
- Centre for Ecology &Hydrology, MacLean Building, Benson Lane, Wallingford, Oxfordshire, OX10 8BB, UK
| | - D J Spurgeon
- Centre for Ecology &Hydrology, MacLean Building, Benson Lane, Wallingford, Oxfordshire, OX10 8BB, UK
| | - M S Heard
- Centre for Ecology &Hydrology, MacLean Building, Benson Lane, Wallingford, Oxfordshire, OX10 8BB, UK
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Baas J, Vijver M, Rambohul J, Dunbar M, van 't Zelfde M, Svendsen C, Spurgeon D. Comparison and evaluation of pesticide monitoring programs using a process-based mixture model. Environ Toxicol Chem 2016; 35:3113-3123. [PMID: 27183059 DOI: 10.1002/etc.3492] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2015] [Revised: 02/07/2016] [Accepted: 05/12/2016] [Indexed: 06/05/2023]
Abstract
A number of European countries run large-scale pesticide monitoring schemes in watersheds aimed at identifying and evaluating the presence of pesticide residues in the environment. These schemes provide national and regional scale assessments of pesticide concentrations within the context of environmental quality assessment, aiming to ensure some degree of ecological protection. The present study is aimed at evaluating the joint effects of the pesticide mixtures detected in monitoring programs, using a process-based mixture model that was parameterized for Daphnia magna. In total, over 15 000 samples containing over 1 million individual measurements were evaluated for effects. It was found that there are only a small number of places where one can expect to have effects on daphnids, based on measured concentrations. The most polluted samples would cause extinction of a daphnid population within only 30 h. The results show that effects are mostly triggered by a limited number of pesticide residues at locations with high emissions. It was also shown that the analytical detection limits are basically too high to exclude mixture effects. So, despite all the effort that is put into chemical monitoring programs, it remains a challenge to make statements on whether or not the environment is protected. Recommendations are offered for a different setup of monitoring programs to improve this situation. Environ Toxicol Chem 2016;35:3113-3123. © 2016 SETAC.
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Affiliation(s)
- Jan Baas
- Centre for Ecology and Hydrology, MacLean Building, Wallingford, Oxfordshire, United Kingdom
| | - Martina Vijver
- Institute of Environmental Sciences (CML), Van Steenisgebouw, Leiden, The Netherlands
| | - Justin Rambohul
- Environment Agency, Kings Meadow House, Reading, Berkshire United Kingdom
| | - Mike Dunbar
- Environment Agency, Kings Meadow House, Reading, Berkshire United Kingdom
| | - Maarten van 't Zelfde
- Institute of Environmental Sciences (CML), Van Steenisgebouw, Leiden, The Netherlands
| | - Claus Svendsen
- Centre for Ecology and Hydrology, MacLean Building, Wallingford, Oxfordshire, United Kingdom
| | - Dave Spurgeon
- Centre for Ecology and Hydrology, MacLean Building, Wallingford, Oxfordshire, United Kingdom
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Spurgeon D, Hesketh H, Lahive E, Svendsen C, Baas J, Robinson A, Horton A, Heard M. Chronic oral lethal and sub‐lethal toxicities of different binary mixtures of pesticides and contaminants in bees (Apis mellifera, Osmia bicornis and Bombus terrestris). ACTA ACUST UNITED AC 2016. [DOI: 10.2903/sp.efsa.2016.en-1076] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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43
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Read DS, Matzke M, Gweon HS, Newbold LK, Heggelund L, Ortiz MD, Lahive E, Spurgeon D, Svendsen C. Soil pH effects on the interactions between dissolved zinc, non-nano- and nano-ZnO with soil bacterial communities. Environ Sci Pollut Res Int 2016; 23:4120-4128. [PMID: 25903189 DOI: 10.1007/s11356-015-4538-z] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Accepted: 04/12/2015] [Indexed: 06/04/2023]
Abstract
Zinc oxide nanoparticles (ZnO NPs) are used in an array of products and processes, ranging from personal care products to antifouling paints, textiles, food additives, antibacterial agents and environmental remediation processes. Soils are an environment likely to be exposed to manmade nanoparticles due to the practice of applying sewage sludge as a fertiliser or as an organic soil improver. However, understanding on the interactions between soil properties, nanoparticles and the organisms that live within soil is lacking, especially with regards to soil bacterial communities. We studied the effects of nanoparticulate, non-nanoparticulate and ionic zinc (in the form of zinc chloride) on the composition of bacterial communities in soil with a modified pH range (from pH 4.5 to pH 7.2). We observed strong pH-dependent effects on the interaction between bacterial communities and all forms of zinc, with the largest changes in bacterial community composition occurring in soils with low and medium pH levels (pH 4.8 and 5.9). The high pH soil (pH 7.2) was less susceptible to the effects of zinc exposure. At the highest doses of zinc (2500 mg/kg dw soil), both nano and non-nano particulate zinc applications elicited a similar response in the soil bacterial community, and this differed significantly to the ionic zinc salt treatment. The results highlight the importance of considering soil pH in nanotoxicology studies, although further work is needed to determine the exact mechanisms controlling the toxicity and fate and interactions of nanoparticles with soil microbial communities.
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Affiliation(s)
- Daniel S Read
- NERC Centre for Ecology & Hydrology, Benson Lane, Crowmarsh Gifford, Wallingford, OX10 8BB, UK.
| | - Marianne Matzke
- NERC Centre for Ecology & Hydrology, Benson Lane, Crowmarsh Gifford, Wallingford, OX10 8BB, UK
| | - Hyun S Gweon
- NERC Centre for Ecology & Hydrology, Benson Lane, Crowmarsh Gifford, Wallingford, OX10 8BB, UK
| | - Lindsay K Newbold
- NERC Centre for Ecology & Hydrology, Benson Lane, Crowmarsh Gifford, Wallingford, OX10 8BB, UK
| | - Laura Heggelund
- NERC Centre for Ecology & Hydrology, Benson Lane, Crowmarsh Gifford, Wallingford, OX10 8BB, UK
- Department of Environmental Engineering, Technical University of Denmark, Miljoevej, building 113, 2800, Kgs Lyngby, Denmark
| | - Maria Diez Ortiz
- NERC Centre for Ecology & Hydrology, Benson Lane, Crowmarsh Gifford, Wallingford, OX10 8BB, UK
- LEITAT Technological Center, C/ de la Innovació, 2, 08225, Terrassa, Barcelona, Spain
| | - Elma Lahive
- NERC Centre for Ecology & Hydrology, Benson Lane, Crowmarsh Gifford, Wallingford, OX10 8BB, UK
| | - David Spurgeon
- NERC Centre for Ecology & Hydrology, Benson Lane, Crowmarsh Gifford, Wallingford, OX10 8BB, UK
| | - Claus Svendsen
- NERC Centre for Ecology & Hydrology, Benson Lane, Crowmarsh Gifford, Wallingford, OX10 8BB, UK
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44
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Kroll A, Matzke M, Rybicki M, Obert-Rauser P, Burkart C, Jurkschat K, Verweij R, Sgier L, Jungmann D, Backhaus T, Svendsen C. Mixed messages from benthic microbial communities exposed to nanoparticulate and ionic silver: 3D structure picks up nano-specific effects, while EPS and traditional endpoints indicate a concentration-dependent impact of silver ions. Environ Sci Pollut Res Int 2016; 23:4218-4234. [PMID: 26122573 PMCID: PMC4766215 DOI: 10.1007/s11356-015-4887-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2015] [Accepted: 06/15/2015] [Indexed: 06/04/2023]
Abstract
Silver nanoparticles (AgNP) are currently defined as emerging pollutants in surface water ecosystems. Whether the toxic effects of AgNP towards freshwater organisms are fully explainable by the release of ionic silver (Ag(+)) has not been conclusively elucidated. Long-term effects to benthic microbial communities (periphyton) that provide essential functions in stream ecosystems are unknown. The effects of exposure of periphyton to 2 and 20 μg/L Ag(+) (AgNO3) and AgNP (polyvinylpyrrolidone stabilised) were investigated in artificial indoor streams. The extracellular polymeric substances (EPS) and 3D biofilm structure, biomass, algae species, Ag concentrations in the water phase and bioassociated Ag were analysed. A strong decrease in total Ag was observed within 4 days. Bioassociated Ag was proportional to dissolved Ag indicating a rate limitation by diffusion across the diffusive boundary layer. Two micrograms per liter of AgNO3 or AgNP did not induce significant effects despite detectable bioassociation of Ag. The 20-μg/L AgNO3 affected green algae and diatom communities, biomass and the ratio of polysaccharides to proteins in EPS. The 20-μg/L AgNO3 and AgNP decreased biofilm volume to about 50 %, while the decrease of biomass was lower in 20 μg/L AgNP samples than the 20-μg/L AgNO3 indicating a compaction of the NP-exposed biofilms. Roughness coefficients were lower in 20 μg/L AgNP-treated samples. The more traditional endpoints (biomass and diversity) indicated silver ion concentration-dependent effects, while the newly introduced parameters (3D structure and EPS) indicated both silver ion concentration-dependent effects and effects related to the silver species applied.
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Affiliation(s)
- Alexandra Kroll
- Environmental Toxicology, Eawag, Swiss Federal Institute of Aquatic Science and Technology, 8600, Dübendorf, Switzerland.
| | - Marianne Matzke
- Ecotoxicology, Acremann Section, NERC Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, OX10 8BB, UK
| | - Marcus Rybicki
- Faculty Environmental Sciences, Institute for Hydrobiology, Technical University of Dresden, Zellescher Weg 40, 01217, Dresden, Germany
| | - Patrick Obert-Rauser
- Faculty Environmental Sciences, Institute for Hydrobiology, Technical University of Dresden, Zellescher Weg 40, 01217, Dresden, Germany
| | - Corinna Burkart
- Faculty Environmental Sciences, Institute for Hydrobiology, Technical University of Dresden, Zellescher Weg 40, 01217, Dresden, Germany
| | - Kerstin Jurkschat
- Department of Materials, Oxford University, Begbroke Science Park, Begbroke Hill, Yarnton, Oxford, OX5 1PF, UK
| | - Rudo Verweij
- Department of Animal Ecology, Faculty of Earth and Life Sciences, Institute of Ecological Science, Vrije Universiteit Amsterdam, De Boelelaan 1085, 1081 HV, Amsterdam, The Netherlands
| | - Linn Sgier
- Environmental Toxicology, Eawag, Swiss Federal Institute of Aquatic Science and Technology, 8600, Dübendorf, Switzerland
| | - Dirk Jungmann
- Faculty Environmental Sciences, Institute for Hydrobiology, Technical University of Dresden, Zellescher Weg 40, 01217, Dresden, Germany
| | - Thomas Backhaus
- Department of Biological and Environmental Sciences, University of Gothenburg, Carl Skottsbergs Gata 22 B, 40530, Gothenburg, Sweden
| | - Claus Svendsen
- Ecotoxicology, Acremann Section, NERC Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, OX10 8BB, UK
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45
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Tourinho PS, van Gestel CAM, Morgan AJ, Kille P, Svendsen C, Jurkschat K, Mosselmans JFW, Soares AMVM, Loureiro S. Toxicokinetics of Ag in the terrestrial isopod Porcellionides pruinosus exposed to Ag NPs and AgNO₃ via soil and food. Ecotoxicology 2016; 25:267-278. [PMID: 26581474 DOI: 10.1007/s10646-015-1585-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 11/06/2015] [Indexed: 06/05/2023]
Abstract
Silver nanoparticles (Ag NPs) have been used in numerous consumer products and may enter the soil through the land application of biosolids. However, little is known about the relationship between Ag NP exposure and their bioavailability for soil organisms. This study aims at comparing the uptake and elimination kinetics of Ag upon exposures to different Ag forms (NPs and ionic Ag (as AgNO3)) in the isopod Porcellionides pruinosus. Isopods were exposed to contaminated Lufa 2.2 soil or alder leaves as food. Uptake and elimination rate constants for soil exposure did not significantly differ between Ag NPs and ionic Ag at 30 and 60 mg Ag/kg. For dietary exposure, the uptake rate constant was up to 5 times higher for Ag NPs than for AgNO3, but this was related to feeding activity and exposure concentrations, while no difference in the elimination rate constants was found. When comparing both routes, dietary exposure resulted in lower Ag uptake rate constants but elimination rate constants did not differ. A fast Ag uptake was observed from both routes and most of the Ag taken up seemed not to be eliminated. Synchrotron X-ray fluorescence showed Ag in the S-cells of the hepatopancreas, thus supporting the observations from the kinetic experiment (i.e. low elimination). In addition, our results show that isopods have an extremely high Ag accumulation capacity, suggesting the presence of an efficient Ag storage compartment.
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Affiliation(s)
- Paula S Tourinho
- Department of Biology and the Centre for Environmental and Marine Studies, University of Aveiro, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal.
| | - Cornelis A M van Gestel
- Department of Ecological Science, Faculty of Earth and Life Sciences, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - A John Morgan
- Cardiff School of Biosciences, BIOSI 1, University of Cardiff, P.O. Box 915, Cardiff, CF10 3TL, UK
| | - Peter Kille
- Cardiff School of Biosciences, BIOSI 1, University of Cardiff, P.O. Box 915, Cardiff, CF10 3TL, UK
| | - Claus Svendsen
- Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, Oxfordshire, OX10 8BB, UK
| | - Kerstin Jurkschat
- Department of Materials, Oxford University, Begbroke Science Park, Sandy Lane Yarnton, Oxford, OX5 1PF, UK
| | - J Fred W Mosselmans
- Diamond Light Source Ltd., Harwell Science and Innovation Campus, Didcot, UK
| | - Amadeu M V M Soares
- Department of Biology and the Centre for Environmental and Marine Studies, University of Aveiro, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal
| | - Susana Loureiro
- Department of Biology and the Centre for Environmental and Marine Studies, University of Aveiro, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal
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Nascimento FJA, Svendsen C, Bradshaw C. Joint Toxicity of Cadmium and Ionizing Radiation on Zooplankton Carbon Incorporation, Growth and Mobility. Environ Sci Technol 2016; 50:1527-1535. [PMID: 26694520 DOI: 10.1021/acs.est.5b04684] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The risk of exposure to radioactive elements is seldom assessed considering mixture toxicity, potentially over- or underestimating biological and ecological effects on ecosystems. This study investigated how three end points, carbon transfer between phytoplankton and Daphnia magna, D. magna mobility and growth, responded to exposure to γ-radiation in combination with the heavy metal cadmium (Cd), using the MIXTOX approach. Observed effects were compared with mixture effects predicted by concentration addition (CA) and independent action (IA) models and with deviations for synergistic/antagonistic (S/A), dose-level (DL), and dose-ratio (DR) dependency interactions. Several patterns of response were observed depending on the end point tested. DL-dependent deviation from the IA model was observed for carbon incorporation with antagonism switching to synergism at higher doses, while the CA model indicated synergism, mainly driven by effects at high doses of γ-radiation. CA detected antagonism regarding acute immobilization, while IA predicted DR-dependency. Both CA and IA also identified antagonism for daphnid growth. In general, effects of combinations of γ-radiation and Cd seem to be antagonistic at lower doses, but synergistic at the higher range of the doses tested. Our results highlight the importance of investigating the effects of exposure to γ-radiation in a multistressor context.
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Affiliation(s)
- Francisco J A Nascimento
- Department of Ecology, Environment and Plant Sciences, Stockholm University , Stockholm 106 91, Sweden
| | - Claus Svendsen
- Centre for Ecology and Hydrology , Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, Oxfordshire OX10 8BB, United Kingdom
| | - Clare Bradshaw
- Department of Ecology, Environment and Plant Sciences, Stockholm University , Stockholm 106 91, Sweden
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Cedergreen N, Nørhave NJ, Svendsen C, Spurgeon DJ. Variable Temperature Stress in the Nematode Caenorhabditis elegans (Maupas) and Its Implications for Sensitivity to an Additional Chemical Stressor. PLoS One 2016; 11:e0140277. [PMID: 26784453 PMCID: PMC4718611 DOI: 10.1371/journal.pone.0140277] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Accepted: 09/22/2015] [Indexed: 11/18/2022] Open
Abstract
A wealth of studies has investigated how chemical sensitivity is affected by temperature, however, almost always under different constant rather than more realistic fluctuating regimes. Here we compared how the nematode Caenorhabditis elegans responds to copper at constant temperatures (8-24°C) and under fluctuation conditions of low (±4°C) and high (±8°C) amplitude (averages of 12, 16, 20°C and 16°C respectively). The DEBkiss model was used to interpret effects on energy budgets. Increasing constant temperature from 12-24°C reduced time to first egg, life-span and population growth rates consistent with temperature driven metabolic rate change. Responses at 8°C did not, however, accord with this pattern (including a deviation from the Temperature Size Rule), identifying a cold stress effect. High amplitude variation and low amplitude variation around a mean temperature of 12°C impacted reproduction and body size compared to nematodes kept at the matching average constant temperatures. Copper exposure affected reproduction, body size and life-span and consequently population growth. Sensitivity to copper (EC50 values), was similar at intermediate temperatures (12, 16, 20°C) and higher at 24°C and especially the innately stressful 8°C condition. Temperature variation did not increase copper sensitivity. Indeed under variable conditions including time at the stressful 8°C condition, sensitivity was reduced. DEBkiss identified increased maintenance costs and increased assimilation as possible mechanisms for cold and higher copper concentration effects. Model analysis of combined variable temperature effects, however, demonstrated no additional joint stressor response. Hence, concerns that exposure to temperature fluctuations may sensitise species to co-stressor effects seem unfounded in this case.
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Affiliation(s)
- Nina Cedergreen
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksberg C, Copenhagen, Denmark
| | - Nils Jakob Nørhave
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksberg C, Copenhagen, Denmark
| | - Claus Svendsen
- Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, Oxfordshire OX10 8BB, United Kingdom
| | - David J. Spurgeon
- Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, Oxfordshire OX10 8BB, United Kingdom
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48
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Laycock A, Diez-Ortiz M, Larner F, Dybowska A, Spurgeon D, Valsami-Jones E, Rehkämper M, Svendsen C. Earthworm Uptake Routes and Rates of Ionic Zn and ZnO Nanoparticles at Realistic Concentrations, Traced Using Stable Isotope Labeling. Environ Sci Technol 2016; 50:412-419. [PMID: 26588002 DOI: 10.1021/acs.est.5b03413] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The environmental behavior of ZnO nanoparticles (NPs), their availability to, uptake pathways by, and biokinetics in the earthworm Lumbricus rubellus were investigated using stable isotope labeling. Zinc isotopically enriched to 99.5% in (68)Zn ((68)Zn-E) was used to prepare (68)ZnO NPs and a dissolved phase of (68)Zn for comparison. These materials enabled tracing of environmentally relevant (below background) NP additions to soil of only 5 mg (68)Zn-E kg(-1). Uptake routes were isolated by introducing earthworms with sealed and unsealed mouthparts into test soils for up to 72 h. The Zn isotope compositions of the soils, pore waters and earthworms were then determined using multiple collector inductively coupled plasma mass spectrometry. Detection and quantification of (68)Zn-E in earthworm tissue was possible after only 4 h of dermal exposure, when the uptake of (68)Zn-E had increased the total Zn tissue concentration by 0.03‰. The results demonstrate that at these realistic exposure concentrations there is no distinguishable difference between the uptake of the two forms of Zn by the earthworm L. rubellus, with the dietary pathway accounting for ∼95% of total uptake. This stands in contrast to comparable studies where high dosing levels were used and dermal uptake is dominant.
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Affiliation(s)
- Adam Laycock
- Department of Earth Science & Engineering, Imperial College London , London SW7 2AZ, England
- Earth Sciences, Natural History Museum , Cromwell Road, London SW7 5BD, England
| | - Maria Diez-Ortiz
- Centre for Ecology and Hydrology , Wallingford, Oxfordshire OX10 8BB, England
- Leitat Technology Centre , C/de la Innovació 2, 08225 Terrassa, Barcelona, Spain
| | - Fiona Larner
- Department of Earth Science & Engineering, Imperial College London , London SW7 2AZ, England
- Department of Earth Sciences, University of Oxford , South Parks Road, Oxford OX1 3AN, England
| | - Agnieszka Dybowska
- Earth Sciences, Natural History Museum , Cromwell Road, London SW7 5BD, England
| | - David Spurgeon
- Centre for Ecology and Hydrology , Wallingford, Oxfordshire OX10 8BB, England
| | - Eugenia Valsami-Jones
- Earth Sciences, Natural History Museum , Cromwell Road, London SW7 5BD, England
- School of Geography, Earth and Environmental Sciences, University of Birmingham , Edgbaston, Birmingham, B15 2TT, England
| | - Mark Rehkämper
- Department of Earth Science & Engineering, Imperial College London , London SW7 2AZ, England
- Earth Sciences, Natural History Museum , Cromwell Road, London SW7 5BD, England
| | - Claus Svendsen
- Centre for Ecology and Hydrology , Wallingford, Oxfordshire OX10 8BB, England
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Tyne W, Little S, Spurgeon DJ, Svendsen C. Hormesis depends upon the life-stage and duration of exposure: Examples for a pesticide and a nanomaterial. Ecotoxicol Environ Saf 2015; 120:117-23. [PMID: 26057078 DOI: 10.1016/j.ecoenv.2015.05.024] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2014] [Revised: 04/28/2015] [Accepted: 05/16/2015] [Indexed: 05/26/2023]
Abstract
Tests to assess toxic effects on the reproduction of adult C. elegans after 72h exposure for two chemicals, (3-(3,4-dichlorophenyl)-1,1-dimethylurea (DCMU)), also known as diuron, and silver nanoparticles (Ag NPs) indicated potential, although not significant hormesis. Follow up toxicity tests comparing the potential hormesis concentrations with controls at high replication confirmed that the stimulatory effect was repeatable and also statistically significant within the test. To understand the relevance of the hormesis effects for overall population fitness, full life-cycle toxicity tests were conducted for each chemical. When nematodes were exposed to DCMU over the full life-span, the hormesis effect for reproduction seen in short-term tests was no longer evident. Further at the putative hormesis concentrations, a negative effect of DCMU on time to maturation was also seen. For the Ag NPs, the EC50 for effects on reproduction in the life-cycle exposure was substantially lower than in the short-term test, the EC50s estimated by a three parameter log logistic model being 2.9mg/L and 0.75mg/L, respectively. This suggests that the level of toxicity for Ag NPs for C. elegans reproduction is dependant on the life stage exposed and possibly the duration of the exposure. Further, in the longer duration exposures, hormesis effects on reproduction seen in the short-term exposures were no longer apparent. Instead, all concentrations reduced both overall brood size and life-span. These results for both chemicals suggest that the hormesis observed for a single endpoint in short-term exposure may be the result of a temporary reallocation of resources between traits that are not sustained over the full life-time. Such reallocation is consistent with energy budget theories for organisms subject to toxic stress.
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Affiliation(s)
- William Tyne
- Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, Oxfordshire OX10 8BB, UK.
| | - Simon Little
- Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, Oxfordshire OX10 8BB, UK
| | - David J Spurgeon
- Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, Oxfordshire OX10 8BB, UK
| | - Claus Svendsen
- Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, Oxfordshire OX10 8BB, UK
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Diez-Ortiz M, Lahive E, Kille P, Powell K, Morgan AJ, Jurkschat K, Van Gestel CAM, Mosselmans JFW, Svendsen C, Spurgeon DJ. Uptake routes and toxicokinetics of silver nanoparticles and silver ions in the earthworm Lumbricus rubellus. Environ Toxicol Chem 2015; 34:2263-2270. [PMID: 25917164 DOI: 10.1002/etc.3036] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2014] [Revised: 08/14/2014] [Accepted: 04/24/2015] [Indexed: 06/04/2023]
Abstract
Current bioavailability models, such as the free ion activity model and biotic ligand model, explicitly consider that metal exposure will be mainly to the dissolved metal in ionic form. With the rise of nanotechnology products and the increasing release of metal-based nanoparticles (NPs) to the environment, such models may increasingly be applied to support risk assessment. It is not immediately clear, however, whether the assumption of metal ion exposure will be relevant for NPs. Using an established approach of oral gluing, a toxicokinetics study was conducted to investigate the routes of silver nanoparticles (AgNPs) and Ag(+) ion uptake in the soil-dwelling earthworm Lumbricus rubellus. The results indicated that a significant part of the Ag uptake in the earthworms is through oral/gut uptake for both Ag(+) ions and NPs. Thus, sealing the mouth reduced Ag uptake by between 40% and 75%. An X-ray analysis of the internal distribution of Ag in transverse sections confirmed the presence of increased Ag concentrations in exposed earthworm tissues. For the AgNPs but not the Ag(+) ions, high concentrations were associated with the gut wall, liver-like chloragogenous tissue, and nephridia, which suggest a pathway for AgNP uptake, detoxification, and excretion via these organs. Overall, the results indicate that Ag in the ionic and NP forms is assimilated and internally distributed in earthworms and that this uptake occurs predominantly via the gut epithelium and less so via the body wall. The importance of oral exposure questions the application of current metal bioavailability models, which implicitly consider that the dominant route of exposure is via the soil solution, for bioavailability assessment and modeling of metal-based NPs.
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Affiliation(s)
- Maria Diez-Ortiz
- Centre for Ecology and Hydrology, Crowmarsh Gifford, Wallingford, Oxfordshire, United Kingdom
| | - Elma Lahive
- Centre for Ecology and Hydrology, Crowmarsh Gifford, Wallingford, Oxfordshire, United Kingdom
| | - Peter Kille
- Cardiff School of Biosciences, University of Cardiff, Cardiff, Wales, United Kingdom
| | - Kate Powell
- Cardiff School of Biosciences, University of Cardiff, Cardiff, Wales, United Kingdom
| | - A John Morgan
- Cardiff School of Biosciences, University of Cardiff, Cardiff, Wales, United Kingdom
| | - Kerstin Jurkschat
- Department of Materials, Oxford University, Yarnton, Oxfordshire, United Kingdom
| | - Cornelis A M Van Gestel
- Department of Ecological Science, Faculty of Earth and Life Sciences, VU University, Amsterdam, The Netherlands
| | - J Fred W Mosselmans
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot, Oxfordshire, United Kingdom
| | - Claus Svendsen
- Centre for Ecology and Hydrology, Crowmarsh Gifford, Wallingford, Oxfordshire, United Kingdom
| | - David J Spurgeon
- Centre for Ecology and Hydrology, Crowmarsh Gifford, Wallingford, Oxfordshire, United Kingdom
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