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Arreguin-Rebolledo U, Castelhano Gebara R, Valencia-Castañeda G, Rico-Martínez R, Frías-Espericueta MG, Longo E, Páez-Osuna F. Toxicity of binary-metal mixtures (As, Cd, Cu, Fe, Hg, Pb and Zn) in the euryhaline rotifer Proales similis: Antagonistic and synergistic effects. MARINE POLLUTION BULLETIN 2024; 198:115819. [PMID: 37995590 DOI: 10.1016/j.marpolbul.2023.115819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 11/13/2023] [Accepted: 11/17/2023] [Indexed: 11/25/2023]
Abstract
Data regarding the effects of binary metal mixtures in marine zooplankton are scarce, particularly for rotifers. We examined the toxicity of 21 binary equitoxic mixtures of As, Cd, Cu, Fe, Hg, Pb, and Zn on the euryhaline rotifer Proales similis. The toxic units (TU50) revealed that 20 of these binary mixtures exhibited synergistic effects (TU50 < 1.00). The AsHg mixture showed a strong antagonistic effect (TU50 = 2.39), whereas the HgCu interaction exhibited a significant synergistic effect (TU50 = 0.29) on P. similis. TU50 values were <0.60 in all cases that showed synergism (80 %). Regarding the MIXTOX analysis, 13 binary mixtures presented some level of synergism, while two mixtures presented only additivity. Results emphasize the need for environmental agencies to revise and readjust protection guidelines for marine biota in response to the evident synergistic effects occurring at metal mixtures concentrations below the current permissible limits.
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Affiliation(s)
- Uriel Arreguin-Rebolledo
- Centro de Ciencias Básicas, Departamento de Química, Universidad Autónoma de Aguascalientes, Avenida Universidad 940, C.P. 20100 Aguascalientes, Ags, Mexico; Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de Mexico, Unidad Académica Mazatlán, Joel Montes Camarena s/n, Mazatlán 82000, Sinaloa, Mexico
| | - Renan Castelhano Gebara
- Center for the Development of Functional Materials (CDMF), Universidade Federal de São Carlos (UFSCar), São Carlos, São Paulo, Brazil
| | - Gladys Valencia-Castañeda
- Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de Mexico, Unidad Académica Mazatlán, Joel Montes Camarena s/n, Mazatlán 82000, Sinaloa, Mexico
| | - Roberto Rico-Martínez
- Centro de Ciencias Básicas, Departamento de Química, Universidad Autónoma de Aguascalientes, Avenida Universidad 940, C.P. 20100 Aguascalientes, Ags, Mexico
| | | | - Elson Longo
- Center for the Development of Functional Materials (CDMF), Universidade Federal de São Carlos (UFSCar), São Carlos, São Paulo, Brazil
| | - Federico Páez-Osuna
- Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de Mexico, Unidad Académica Mazatlán, Joel Montes Camarena s/n, Mazatlán 82000, Sinaloa, Mexico.
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2
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Gestin O, Lacoue-Labarthe T, Delorme N, Garnero L, Geffard O, Lopes C. Influence of the exposure concentration of dissolved cadmium on its organotropism, toxicokinetic and fate in Gammarus fossarum. ENVIRONMENT INTERNATIONAL 2023; 171:107673. [PMID: 36580734 DOI: 10.1016/j.envint.2022.107673] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 11/03/2022] [Accepted: 11/29/2022] [Indexed: 06/17/2023]
Abstract
Information on the relationship between the exposure concentrations of metals and their biodistribution among organs remained scarce in invertebrates. The objective of this study was to investigate the effects of Cd concentration on the organotropism, toxico-kinetic and fate of this metal in different organs of gammarids exposed to dissolved radioisotope 109Cd. Gammarids male were exposed for 7 days to three environmental Cd concentrations (i.e. 4, 52 and 350 ng.L-1) before being placed in depuration conditions (i.e. uncontaminated water). At several sampling times, Cd concentrations were determined by 109Cd γ-counting in water, caeca, cephalon, gills, intestine and remaining tissues. Bioconcentration Factors (BCF) and Cd relative proportions in organs were calculated to assess the exposure concentration effect on the bioaccumulation capacities. The dependance of the organ-specific kinetic parameters to Cd water concentrations were estimated by fitting nested one-compartment toxico-kinetic (TK) models to both the accumulation and depuration data, by Bayesian inference. Then, for each Cd concentrations, the metal exchanges among organs over time were formalized by a multi-compartments TK model fitted to all organ data simultaneously. Our results highlighted that, at the end of the exposure phase, BCF and Cd relative proportions, in each organ, were not significantly modulated by water concentrations. Kinetically, Cd accumulation rates in all organs (except intestines) were depended on the exposure concentration, but not the elimination rates. The in vivo management of Cd (i.e. metal exchanges among organs) remained qualitatively unchanged according to exposure concentration. All these results also highlighted key role of that organs in the management of Cd: bioconcentration by caeca, storage by gills and main entry pathway by intestine. This study shows the interest of implementing TK approaches to test the effect of environmental factors on bioaccumulation, inter-organ exchanges and fate of contaminants in invertebrate body to enhance the understanding of the toxicity risk.
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Affiliation(s)
- Ophélia Gestin
- Univ Lyon, Université Lyon 1, CNRS, Laboratoire de Biométrie et Biologie Evolutive UMR 5558, 69622 Villeurbanne, France; Littoral Environnement et Sociétés (LIENSs), UMR 7266 CNRS - Université de la Rochelle, 2, rue Olympe de Gouges, 17000 La Rochelle, France; INRAE, RiverLy, Ecotoxicology Laboratory, 5 Avenue de la Doua, CS20244, 69625 Villeurbanne Cedex, France.
| | - Thomas Lacoue-Labarthe
- Littoral Environnement et Sociétés (LIENSs), UMR 7266 CNRS - Université de la Rochelle, 2, rue Olympe de Gouges, 17000 La Rochelle, France.
| | - Nicolas Delorme
- INRAE, RiverLy, Ecotoxicology Laboratory, 5 Avenue de la Doua, CS20244, 69625 Villeurbanne Cedex, France.
| | - Laura Garnero
- INRAE, RiverLy, Ecotoxicology Laboratory, 5 Avenue de la Doua, CS20244, 69625 Villeurbanne Cedex, France.
| | - Olivier Geffard
- INRAE, RiverLy, Ecotoxicology Laboratory, 5 Avenue de la Doua, CS20244, 69625 Villeurbanne Cedex, France.
| | - Christelle Lopes
- Univ Lyon, Université Lyon 1, CNRS, Laboratoire de Biométrie et Biologie Evolutive UMR 5558, 69622 Villeurbanne, France.
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Rodríguez-Martín D, Murciano A, Herráiz M, de Francisco P, Amaro F, Gutiérrez JC, Martín-González A, Díaz S. Arsenate and arsenite differential toxicity in Tetrahymena thermophila. JOURNAL OF HAZARDOUS MATERIALS 2022; 431:128532. [PMID: 35248958 DOI: 10.1016/j.jhazmat.2022.128532] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2022] [Revised: 02/09/2022] [Accepted: 02/18/2022] [Indexed: 06/14/2023]
Abstract
A comparative analysis of toxicities of both arsenic forms (arsenite and arsenate) in the model eukaryotic microorganism Tetrahymena thermophila (ciliate protozoa) has shown the presence of various detoxification mechanisms and cellular effects comparable to those of animal cells under arsenic stress. In the wild type strain SB1969 arsenate is almost 2.5 times more toxic than arsenite. According to the concentration addition model used in binary metallic mixtures their toxicities show an additive effect. Using fluorescent assays and flow cytometry, it has been detected that As(V) generates elevated levels of ROS/RNS compared to As(III). Both produce the same levels of superoxide anion, but As(V) also causes greater increases in hydrogen peroxide and peroxynitrite. The mitochondrial membrane potential is affected by both As(V) and As(III), and electron microscopy has also revealed that mitochondria are the main target of both arsenic ionic forms. Fusion/fission and swelling mitochondrial and mitophagy, together with macroautophagy, vacuolization and mucocyst extruction are mainly associated to As(V) toxicity, while As(III) induces an extensive lipid metabolism dysfunction (adipotropic effect). Quantitative RT-PCR analysis of some genes encoding antioxidant proteins or enzymes has shown that glutathione and thioredoxin metabolisms are involved in the response to arsenic stress. Likewise, the function of metallothioneins seems to be crucial in arsenic detoxification processes, after using both metallothionein knockout and knockdown strains and cells overexpressing metallothionein genes from this ciliate. The analysis of the differential toxicity of As(III) and As(V) shown in this study provides cytological and molecular tools to be used as biomarkers for each of the two arsenic ionic forms.
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Affiliation(s)
- Daniel Rodríguez-Martín
- Animal Health Research Centre (CISA), National Institute for Agricultural and Food Research and Technology (INIA-CSIC), 28130 Madrid, Spain.
| | - Antonio Murciano
- Department of Biodiversity, Ecology and Evolution, Faculty of Biology, Complutense University of Madrid, Spain.
| | - Marta Herráiz
- Department of Genetics, Physiology and Microbiology, Faculty of Biology, Complutense University of Madrid, Spain.
| | | | - Francisco Amaro
- Department of Genetics, Physiology and Microbiology, Faculty of Biology, Complutense University of Madrid, Spain.
| | - Juan Carlos Gutiérrez
- Department of Genetics, Physiology and Microbiology, Faculty of Biology, Complutense University of Madrid, Spain.
| | - Ana Martín-González
- Department of Genetics, Physiology and Microbiology, Faculty of Biology, Complutense University of Madrid, Spain.
| | - Silvia Díaz
- Department of Genetics, Physiology and Microbiology, Faculty of Biology, Complutense University of Madrid, Spain.
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4
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Gestin O, Lacoue-Labarthe T, Coquery M, Delorme N, Garnero L, Dherret L, Ciccia T, Geffard O, Lopes C. One and multi-compartments toxico-kinetic modeling to understand metals' organotropism and fate in Gammarus fossarum. ENVIRONMENT INTERNATIONAL 2021; 156:106625. [PMID: 34010754 DOI: 10.1016/j.envint.2021.106625] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Revised: 04/07/2021] [Accepted: 05/03/2021] [Indexed: 06/12/2023]
Abstract
The use of freshwater invertebrates for biomonitoring has been increasing for several decades, but little is known about relations between external exposure concentration of metals and their biodistribution among different tissues. One and multi-compartments toxicokinetic (TK) models are powerful tools to formalize and predict how a contaminant is bioaccumulated. The aim of this study is to develop modeling approaches to improve knowledge on dynamic of accumulation and fate of Cd and Hg in gammarid's organs. Gammarids were exposed to dissolved metals (11.1 ± 1.2 µg.L-1 of Cd or 0.27 ± 0.13 µg.L-1 of Hg) before a depuration phase. At each sampling days, their organs (caeca, cephalon, intestine and remaining tissues) were separated by dissection before analyses. Results allowed us to determine that i) G.fossarum takes up Cd as efficiently as the mussel M.galloprovincialis, but eliminates it more rapidly, ii) organs which accumulate and depurate the most, in terms of concentrations, are caeca and intestine for both metals; iii) the one-compartment TK models is the most relevant for Hg, while the multi-compartments TK model allows a better fit to Cd data, demonstrating dynamic transfer of Cd among organs.
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Affiliation(s)
- Ophélia Gestin
- Univ Lyon, Université Lyon 1, CNRS, Laboratoire de Biométrie et Biologie Evolutive UMR 5558, 69622 Villeurbanne, France; Littoral Environnement et Sociétés (LIENSs), UMR 7266 CNRS - Université de la Rochelle, 2 rue Olympe de Gouges, 17000 La Rochelle, France; INRAE, RiverLy, Ecotoxicology Laboratory, 5 Avenue de la Doua, CS20244, 69625 Villeurbanne Cedex, France.
| | - Thomas Lacoue-Labarthe
- Littoral Environnement et Sociétés (LIENSs), UMR 7266 CNRS - Université de la Rochelle, 2 rue Olympe de Gouges, 17000 La Rochelle, France.
| | - Marina Coquery
- INRAE, RiverLy, Aquatic Chemistry Laboratory, 5 Avenue de la Doua, CS20244, 69625 Villeurbanne Cedex, France.
| | - Nicolas Delorme
- INRAE, RiverLy, Ecotoxicology Laboratory, 5 Avenue de la Doua, CS20244, 69625 Villeurbanne Cedex, France.
| | - Laura Garnero
- INRAE, RiverLy, Ecotoxicology Laboratory, 5 Avenue de la Doua, CS20244, 69625 Villeurbanne Cedex, France.
| | - Lysiane Dherret
- INRAE, RiverLy, Aquatic Chemistry Laboratory, 5 Avenue de la Doua, CS20244, 69625 Villeurbanne Cedex, France.
| | - Théo Ciccia
- INRAE, RiverLy, Ecotoxicology Laboratory, 5 Avenue de la Doua, CS20244, 69625 Villeurbanne Cedex, France.
| | - Olivier Geffard
- INRAE, RiverLy, Ecotoxicology Laboratory, 5 Avenue de la Doua, CS20244, 69625 Villeurbanne Cedex, France.
| | - Christelle Lopes
- INRAE, RiverLy, Ecotoxicology Laboratory, 5 Avenue de la Doua, CS20244, 69625 Villeurbanne Cedex, France.
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Jaegers J, Gismondi E. Gammarid exposure to pyriproxyfen and/or cadmium: what effects on the methylfarnesoate signalling pathway? ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:31330-31338. [PMID: 32488711 DOI: 10.1007/s11356-020-09419-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Accepted: 05/21/2020] [Indexed: 06/11/2023]
Abstract
Due to expected changes in climate, it is predicted that disease-carrying mosquitoes will expand their geographical range, resulting in increased use of insect growth regulators (IGRs) to face their proliferation. Among IGRs, pyriproxyfen (PXF) is widely used and has been shown to prevent larvae from developing into adults, rendering them unable to reproduce. However, because of the similarity of crustacean and insect endocrine systems, PXF could also impact aquatic crustaceans. In addition, when spreading in the environment, PXF is found in a mixture with other pollutants such as metallic trace elements, which could alter its effect. Consequently, the present work was devoted to analysing the effects of PXF on the methylfarnesoate (MF) hormonal pathway of the freshwater amphipod Gammarus pulex, as well as its combined binary effects with cadmium (Cd), by measuring MF concentration, as well as the relative transcriptional expression of the farnesoic acid O-methyltransferase (FAMeT) (enzyme limiting the MF production), the methoprene-tolerant receptor (Met), and the broad-complex (BrC) as a transcription factor. Results revealed that single exposures to PXF or Cd have mainly overexpressed FAMeT, Met, and BrC but did not significantly affect MF concentration. Conversely, the mixture exposures seemed to suppress these effects and even achieve antagonistic effects. This work confirmed that PXF single exposure could impact non-target organisms such as amphipods through changes in hormonal pathways of MF. In the same way, it highlighted that Cd could also impair the endocrine system of exposed organisms. However, antagonistic effects have been observed in exposure to mixtures, suggesting different long-term consequences on the growth of amphipods under realistic exposure conditions.
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Affiliation(s)
- Jeremy Jaegers
- Laboratory of Animal Ecology and Ecotoxicology (LEAE) - Freshwater and OceaniC sciences Unit of reSearch (FOCUS), Chemistry Institute, University of Liège, Bât. B6C, 11 allée du 6 Août, B-4000, Sart-Tilman, Belgium.
| | - Eric Gismondi
- Laboratory of Animal Ecology and Ecotoxicology (LEAE) - Freshwater and OceaniC sciences Unit of reSearch (FOCUS), Chemistry Institute, University of Liège, Bât. B6C, 11 allée du 6 Août, B-4000, Sart-Tilman, Belgium
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6
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ThankGod Eze C, Michelangeli F, Otitoloju AA. In vitro cyto-toxic assessment of heavy metals and their binary mixtures on mast cell-like, rat basophilic leukemia (RBL-2H3) cells. CHEMOSPHERE 2019; 223:686-693. [PMID: 30802834 DOI: 10.1016/j.chemosphere.2019.02.035] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Revised: 02/08/2019] [Accepted: 02/08/2019] [Indexed: 06/09/2023]
Abstract
We investigated the cytotoxicity and mechanisms of cell death induced by salts of Cadmium (Cd2+), Lead (Pb2+), Arsenic (AsO43-) and Chromium (Cr+6) on RBL-2H3 cells (a model mast cell line). In addition, cyto-toxic effect on cell viability was assessed to reveal their nature of interaction in binary mixture. The individual cytotoxic characteristics of these metals on RBL-2H3 cell viability showed a concentration-dependent reduction of cell viability. We observed that concentration-dependent cytotoxic potency on RBL-2H3 cells of these metals range in the following order Cd2+>Cr+6>As O43- > Pb2+ with LC50 values of 0.11 μM, 93.58 μM, 397.9 μM and 485.3 μM respectively. Additive effects were observed with Pb2+ + Cd2+, Pb2+ + AsO43-, Pb2+ + Cr+6 and AsO43- + Cr+6. The study revealed that Pb2+, Cd2+, AsO43- and Cr+6 could induce significant (P < 0.01) cell death by apoptosis in RBL-2H3. Highly significant necrotic cell death was observed with Pb2+ and Cr+6 (P < 0.01) than Cd2+ and AsO43- (P < 0.05). Overall, it can be deduced that several cell death executing pathways may be concomitantly activated on exposure to heavy metals and the predominance of one over others might depend on the type of heavy metal, concentration and the metabolic state of the cell. Eventually, binary mixtures of some of these metals showed less cytotoxicity than would be expected from their individual actions and may depend on the co-exposure of the metal ions and their modes of action.
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Anyanwu BO, Ezejiofor AN, Igweze ZN, Orisakwe OE. Heavy Metal Mixture Exposure and Effects in Developing Nations: An Update. TOXICS 2018; 6:E65. [PMID: 30400192 PMCID: PMC6316100 DOI: 10.3390/toxics6040065] [Citation(s) in RCA: 128] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Revised: 10/17/2018] [Accepted: 10/23/2018] [Indexed: 01/06/2023]
Abstract
The drive for development and modernization has come at great cost. Various human activities in developed and developing countries, particularly in sub-Saharan Africa (SSA) have given rise to environmental safety concerns. Increased artisanal mining activities, illegal refining, use of leaded petrol, airborne dust, arbitrary discarding and burning of toxic waste, absorption of production industries in inhabited areas, inadequate environmental legislation, and weak implementation of policies, have given rise to the incomparable contamination and pollution associated with heavy metals in recent decades. This review evaluates the public health effects of heavy metals and their mixtures in SSA. This shows the extent and size of the problem posed by exposure to heavy metal mixtures in regard to public health.
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Affiliation(s)
- Brilliance Onyinyechi Anyanwu
- World Bank Africa Centre of Excellence in Oilfield Chemicals Research, University of Port Harcourt, PMB, 5323 Port Harcourt, Rivers State, Nigeria.
| | - Anthonet Ndidiamaka Ezejiofor
- Department of Experimental Pharmacology & Toxicology, Faculty of Pharmacy, University of Port Harcourt, PMB, 5323 Port Harcourt, Rivers State, Nigeria.
| | - Zelinjo Nkeiruka Igweze
- Department of Experimental Pharmacology & Toxicology, Faculty of Pharmacy, Madonna University Elele, PMB, 5001 Elele, Rivers State, Nigeria.
| | - Orish Ebere Orisakwe
- Department of Experimental Pharmacology & Toxicology, Faculty of Pharmacy, University of Port Harcourt, PMB, 5323 Port Harcourt, Rivers State, Nigeria.
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8
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Karri V, Kumar V, Ramos D, Oliveira E, Schuhmacher M. An in vitro cytotoxic approach to assess the toxicity of heavy metals and their binary mixtures on hippocampal HT-22 cell line. Toxicol Lett 2018; 282:25-36. [DOI: 10.1016/j.toxlet.2017.10.002] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Revised: 09/24/2017] [Accepted: 10/02/2017] [Indexed: 12/23/2022]
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9
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Lebrun JD, Uher E, Fechner LC. Behavioural and biochemical responses to metals tested alone or in mixture (Cd-Cu-Ni-Pb-Zn) in Gammarus fossarum: From a multi-biomarker approach to modelling metal mixture toxicity. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2017; 193:160-167. [PMID: 29096089 DOI: 10.1016/j.aquatox.2017.10.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Revised: 10/23/2017] [Accepted: 10/24/2017] [Indexed: 06/07/2023]
Abstract
Metals are usually present as mixtures at low concentrations in aquatic ecosystems. However, the toxicity and sub-lethal effects of metal mixtures on organisms are still poorly addressed in environmental risk assessment. Here we investigated the biochemical and behavioural responses of Gammarus fossarum to Cu, Cd, Ni, Pb and Zn tested individually or in mixture (M2X) at concentrations twice the levels of environmental quality standards (EQSs) from the European Water Framework Directive. The same metal mixture was also tested with concentrations equivalent to EQSs (M1X), thus in a regulatory context, as EQSs are proposed to protect aquatic biota. For each exposure condition, mortality, locomotion, respiration and enzymatic activities involved in digestive metabolism and moult were monitored over a 120h exposure period. Multi-metric variations were summarized by the integrated biomarker response index (IBR). Mono-metallic exposures shed light on biological alterations occurring at environmental exposure levels in gammarids and depending on the considered metal and gender. As regards mixtures, biomarkers were altered for both M2X and M1X. However, no additive or synergistic effect of metals was observed comparing to mono-metallic exposures. Indeed, bioaccumulation data highlighted competitive interactions between metals in M2X, decreasing subsequently their internalisation and toxicity. IBR values indicated that the health of gammarids was more impacted by M1X than M2X, because of reduced competitions and enhanced uptakes of metals for the mixture at lower, EQS-like concentrations. Models using bioconcentration data obtained from mono-metallic exposures generated successful predictions of global toxicity both for M1X and M2X. We conclude that sub-lethal effects of mixtures identified by the multi-biomarker approach can lead to disturbances in population dynamics of gammarids. Although IBR-based models offer promising lines of enquiry to predict metal mixture toxicity, further studies are needed to confirm their predictive quality on larger ranges of metallic combinations before their use in field conditions.
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Affiliation(s)
- Jérémie D Lebrun
- Irstea, UR HBAN - Artemhys, CS 10030, 92761 Antony cedex, France; Federation of Research FIRE, FR-3020, 75005 Paris, France.
| | - Emmanuelle Uher
- Irstea, UR HBAN - Artemhys, CS 10030, 92761 Antony cedex, France; Federation of Research FIRE, FR-3020, 75005 Paris, France
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10
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Ronci L, De Matthaeis E, Chimenti C, Davolos D. Arsenic-contaminated freshwater: assessing arsenate and arsenite toxicity and low-dose genotoxicity in Gammarus elvirae (Crustacea; Amphipoda). ECOTOXICOLOGY (LONDON, ENGLAND) 2017; 26:581-588. [PMID: 28332024 DOI: 10.1007/s10646-017-1791-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 03/04/2017] [Indexed: 06/06/2023]
Abstract
Arsenic (As) contamination of freshwater is largely due to geogenic processes, but As is also released into the environment because of improper anthropic activities. The European regulatory limits in drinking water are of 10 μg L-1 As. However, knowledge of the genotoxic effects induced by low doses of As in freshwater environments is still scanty. This study was designed to investigate arsenate (As(V)) and arsenite (As(III)) toxicity and low-dose genotoxicity in Gammarus elvirae, which has proved to be a useful organism for genotoxicity assays in freshwater. As(V) and As(III) toxicity was assessed on the basis of the median lethal concentration, LC(50), while estimates of DNA damage were based on the Comet assay. The G. elvirae LC (50-240 h) value we calculated was 1.55 mg L-1 for As(V) and 1.72 mg L-1 for As(III). Arsenic exposure (240 h) at 5, 10, and 50 µg L-1 of As in assays with either arsenate or arsenite-induced DNA damage in hemocytes of G. elvirae in a concentration-dependent manner. Our study provides a basis for future genotoxic research on exposure to freshwater that contains low levels of arsenic.
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Affiliation(s)
- Lucilla Ronci
- Department of Biology and Biotechnology "Charles Darwin", Sapienza University of Rome, Viale dell'Università 32, Rome, Italy
| | - Elvira De Matthaeis
- Department of Biology and Biotechnology "Charles Darwin", Sapienza University of Rome, Viale dell'Università 32, Rome, Italy
| | - Claudio Chimenti
- Department of Biology and Biotechnology "Charles Darwin", Sapienza University of Rome, Viale dell'Università 32, Rome, Italy
| | - Domenico Davolos
- Department of Biology and Biotechnology "Charles Darwin", Sapienza University of Rome, Viale dell'Università 32, Rome, Italy.
- Department of Technological Innovations and Safety of Plants, Products and Anthropic Settlements, INAIL, Research Area, Via R. Ferruzzi 38/40, Rome, Italy.
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Vimalraj S, Sumantran VN, Chatterjee S. MicroRNAs: Impaired vasculogenesis in metal induced teratogenicity. Reprod Toxicol 2017; 70:30-48. [PMID: 28249814 DOI: 10.1016/j.reprotox.2017.02.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Revised: 02/14/2017] [Accepted: 02/21/2017] [Indexed: 02/07/2023]
Abstract
Certain metals have been known for their toxic effects on embryos and fetal development. The vasculature in early pregnancy is extremely dynamic and plays an important role in organogenesis. Nascent blood vessels in early embryonic life are considered to be a primary and delicate target for many teratogens since the nascent blood islands follow a tightly controlled program to form vascular plexus around and inside the embryo for resourcing optimal ingredients for its development. The state of the distribution of toxic metals, their transport mechanisms and the molecular events by which they notch extra-embryonic and embryonic vasculatures are illustrated. In addition, pharmacological aspects of toxic metal induced teratogenicity have also been portrayed. The work reviewed state of the current knowledge of specific role of microRNAs (miRNAs) that are differentially expressed in response to toxic metals, and how they interfere with the vasculogenesis that manifests into embryonic anomalies.
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Affiliation(s)
- Selvaraj Vimalraj
- Vascular Biology Lab, AU-KBC Research Centre, Anna University, Chennai, India.
| | | | - Suvro Chatterjee
- Vascular Biology Lab, AU-KBC Research Centre, Anna University, Chennai, India; Department of Biotechnology, Anna University, Chennai, India.
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Vellinger C, Sohm B, Parant M, Immel F, Usseglio-Polatera P. Investigating the emerging role of comparative proteomics in the search for new biomarkers of metal contamination under varying abiotic conditions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 562:974-986. [PMID: 27157531 DOI: 10.1016/j.scitotenv.2016.04.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Revised: 04/03/2016] [Accepted: 04/04/2016] [Indexed: 06/05/2023]
Abstract
This study aims at investigating the potential use of comparative proteomics as a multi-marker approach of metal contamination, taking into account the potential confounding effect of water temperature. The major objective was to identify combinations of proteins specifically responding to a given metal, even if included in a metal mixture. The diagnostic approach was performed via the comparative analysis of protein expression on spot mapping provided by adult males of Gammarus pulex (Amphipoda, Crustacea) respectively exposed to arsenate (As), cadmium (Cd) or a binary mixture of these metals (AsCd) at three realistic temperatures (5, 10 and 15°C). Proteomic expression analysis was performed by Differential in-Gel Electrophoresis (2D-DiGE), and completed by an adapted inferential statistical approach. Combinations of under/over-expressed protein spots discriminated the metal identity. However, none of these spots discriminated both the individual metal effect (As or Cd) and its effect in metal mixture (AsCd) whatever the tested temperature. Some limits of the two-dimensional analysis of protein spot maps in G. pulex have been highlighted: (i) the presence of contaminating peptides and/or abundant "déja-vu" proteins which can mask the responses of other proteins of interest or (ii) the presence of post-translational modifications. An optimization of the experimental design (especially during the sample preparation) has been described for future investigations. This study has also highlighted (i) the importance of precisely identifying the protein spots of interest to avoid erroneous interpretations in terms of action mechanisms of chemicals and (ii) the importance of working under controlled laboratory conditions with a temperature close to 10°C. In such conditions, we have demonstrated a higher impact of As than Cd on the energetic metabolism of Gammarus. This As impact is reduced in AsCd mixture confirming the antagonistic interaction of this binary mixture previously observed on G. pulex mortality at 10°C.
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Affiliation(s)
- Céline Vellinger
- Laboratoire Interdisciplinaire des Environnements Continentaux (LIEC), CNRS UMR 7360, Université de Lorraine - Metz, France.
| | - Bénédicte Sohm
- Laboratoire Interdisciplinaire des Environnements Continentaux (LIEC), CNRS UMR 7360, Université de Lorraine - Metz, France.
| | - Marc Parant
- Laboratoire Interdisciplinaire des Environnements Continentaux (LIEC), CNRS UMR 7360, Université de Lorraine - Metz, France.
| | - Françoise Immel
- Biogéosciences, CNRS UMR 6282, Université de Bourgogne - Dijon, France.
| | - Philippe Usseglio-Polatera
- Laboratoire Interdisciplinaire des Environnements Continentaux (LIEC), CNRS UMR 7360, Université de Lorraine - Metz, France.
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Wu X, Cobbina SJ, Mao G, Xu H, Zhang Z, Yang L. A review of toxicity and mechanisms of individual and mixtures of heavy metals in the environment. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:8244-59. [PMID: 26965280 DOI: 10.1007/s11356-016-6333-x] [Citation(s) in RCA: 508] [Impact Index Per Article: 63.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Accepted: 02/21/2016] [Indexed: 04/16/2023]
Abstract
The rational for the study was to review the literature on the toxicity and corresponding mechanisms associated with lead (Pb), mercury (Hg), cadmium (Cd), and arsenic (As), individually and as mixtures, in the environment. Heavy metals are ubiquitous and generally persist in the environment, enabling them to biomagnify in the food chain. Living systems most often interact with a cocktail of heavy metals in the environment. Heavy metal exposure to biological systems may lead to oxidation stress which may induce DNA damage, protein modification, lipid peroxidation, and others. In this review, the major mechanism associated with toxicities of individual metals was the generation of reactive oxygen species (ROS). Additionally, toxicities were expressed through depletion of glutathione and bonding to sulfhydryl groups of proteins. Interestingly, a metal like Pb becomes toxic to organisms through the depletion of antioxidants while Cd indirectly generates ROS by its ability to replace iron and copper. ROS generated through exposure to arsenic were associated with many modes of action, and heavy metal mixtures were found to have varied effects on organisms. Many models based on concentration addition (CA) and independent action (IA) have been introduced to help predict toxicities and mechanisms associated with metal mixtures. An integrated model which combines CA and IA was further proposed for evaluating toxicities of non-interactive mixtures. In cases where there are molecular interactions, the toxicogenomic approach was used to predict toxicities. The high-throughput toxicogenomics combines studies in genetics, genome-scale expression, cell and tissue expression, metabolite profiling, and bioinformatics.
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Affiliation(s)
- Xiangyang Wu
- School of the Environment, Jiangsu University, Xuefu Rd. 301, Zhenjiang, 212013, Jiangsu, China.
| | - Samuel J Cobbina
- School of the Environment, Jiangsu University, Xuefu Rd. 301, Zhenjiang, 212013, Jiangsu, China
| | - Guanghua Mao
- School of the Environment, Jiangsu University, Xuefu Rd. 301, Zhenjiang, 212013, Jiangsu, China
| | - Hai Xu
- School of the Environment, Jiangsu University, Xuefu Rd. 301, Zhenjiang, 212013, Jiangsu, China
| | - Zhen Zhang
- School of the Environment, Jiangsu University, Xuefu Rd. 301, Zhenjiang, 212013, Jiangsu, China
| | - Liuqing Yang
- School of Chemistry and Chemical Engineering, Jiangsu University, Xuefu Rd. 301, Zhenjiang, 212013, China.
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Heys KA, Shore RF, Pereira MG, Jones KC, Martin FL. Risk assessment of environmental mixture effects. RSC Adv 2016. [DOI: 10.1039/c6ra05406d] [Citation(s) in RCA: 114] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Determining interactions of multi-component environmental mixtures towards accurate risk assessment.
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Affiliation(s)
- Kelly A. Heys
- Centre for Biophotonics
- Lancaster Environment Centre
- Lancaster University
- Lancaster LA1 4YQ
- UK
| | - Richard F. Shore
- Centre of Ecology and Hydrology
- Lancaster University
- Lancaster LA1 4YQ
- UK
| | - M. Glória Pereira
- Centre of Ecology and Hydrology
- Lancaster University
- Lancaster LA1 4YQ
- UK
| | - Kevin C. Jones
- Centre for Biophotonics
- Lancaster Environment Centre
- Lancaster University
- Lancaster LA1 4YQ
- UK
| | - Francis L. Martin
- Centre for Biophotonics
- Lancaster Environment Centre
- Lancaster University
- Lancaster LA1 4YQ
- UK
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15
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Davolos D, Chimenti C, Ronci L, Setini A, Iannilli V, Pietrangeli B, De Matthaeis E. An integrated study on Gammarus elvirae (Crustacea, Amphipoda): perspectives for toxicology of arsenic-contaminated freshwater. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:15563-15570. [PMID: 26013740 DOI: 10.1007/s11356-015-4727-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Accepted: 04/09/2015] [Indexed: 06/04/2023]
Abstract
The Italian region Latium is characterized by extensive quaternary volcanic systems that contribute greatly to arsenic (As) contamination of freshwater, including drinking water supplies. However, knowledge of the possible toxic effects in these aquatic environments is, despite being highly relevant to public health, still limited. In this paper, we approach this issue using Gammarus elvirae, an amphipod species that inhabits rivers and streams in central Italy, including Latium. We explored the possibility of using G. elvirae in the toxicology of freshwater by addressing the most relevant issues. First, we tested the usefulness of hemocytes from G. elvirae in determining non-specific DNA damage by means of the Comet assay after exposure (24 h and 7 days) to different river water samples in Latium; second, we provided an interpretative overview of the usefulness of hepatopancreatic epithelial cells of G. elvirae as a means of assessing toxicity after long-term exposure to As and other pollutants; third, the LC (50-240 h) value for G. elvirae was estimated for arsenate, which is usually the dominant arsenic species in surface waters. Our study sheds light on G. elvirae at different levels, providing a background for future toxicological research of freshwater.
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Affiliation(s)
- Domenico Davolos
- INAIL, Research, Certification, Verification Area, Department of Technological Innovations and Safety of Plants, Products and Anthropic Settlements (DIT), Via Alessandria, 220/E, 00198, Rome, Italy.
- "Charles Darwin" Department of Biology and Biotechnology, Sapienza University of Rome, Viale dell'Università, 32, 00185, Rome, Italy.
| | - Claudio Chimenti
- "Charles Darwin" Department of Biology and Biotechnology, Sapienza University of Rome, Viale dell'Università, 32, 00185, Rome, Italy
| | - Lucilla Ronci
- "Charles Darwin" Department of Biology and Biotechnology, Sapienza University of Rome, Viale dell'Università, 32, 00185, Rome, Italy
| | - Andrea Setini
- "Charles Darwin" Department of Biology and Biotechnology, Sapienza University of Rome, Viale dell'Università, 32, 00185, Rome, Italy
| | - Valentina Iannilli
- ENEA C.R., Sustainable Management of Agricultural Ecosystems Laboratory, Casaccia, Via Anguillarese, 301, 00123, Rome, Italy
| | - Biancamaria Pietrangeli
- INAIL, Research, Certification, Verification Area, Department of Technological Innovations and Safety of Plants, Products and Anthropic Settlements (DIT), Via Alessandria, 220/E, 00198, Rome, Italy
| | - Elvira De Matthaeis
- "Charles Darwin" Department of Biology and Biotechnology, Sapienza University of Rome, Viale dell'Università, 32, 00185, Rome, Italy
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Cobbina SJ, Chen Y, Zhou Z, Wu X, Feng W, Wang W, Li Q, Zhao T, Mao G, Wu X, Yang L. Interaction of four low dose toxic metals with essential metals in brain, liver and kidneys of mice on sub-chronic exposure. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2015; 39:280-291. [PMID: 25531266 DOI: 10.1016/j.etap.2014.11.030] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Accepted: 11/16/2014] [Indexed: 06/04/2023]
Abstract
This study reports on interactions between low dose toxic and essential metals. Low dose Pb (0.01mg/L), Hg (0.001mg/L), Cd (0.005mg/L) and As (0.01mg/L) were administered singly to four groups of 3-week old mice for 120 days. Pb exposure increased brain Mg and Cu by 55.5% and 266%, respectively. Increased brain Mg resulted from metabolic activity of brain to combat insults, whiles Cu overload was due to alteration and dysfunction of CTR1 and ATP7A molecules. Reduction of liver Ca by 56.0% and 31.6% (on exposure to As and Cd, respectively) resulted from inhibition of Ca-dependent ATPase in nuclei and endoplasmic reticulum through binding with thiol groups. Decreased kidney Mg, Ca and Fe was due to uptake of complexes of As and Cd with thiol groups from proximal tubular lumen. At considerably low doses, the study establishes that, toxic metals disturb the homeostasis of essential metals.
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Affiliation(s)
- Samuel Jerry Cobbina
- School of the Environment, Jiangsu University, Xuefu Rd. 301, Zhenjiang 212013, Jiangsu, China
| | - Yao Chen
- School of the Environment, Jiangsu University, Xuefu Rd. 301, Zhenjiang 212013, Jiangsu, China
| | - Zhaoxiang Zhou
- School of Chemistry and Chemical Engineering, Jiangsu University, Xuefu Rd. 301, Zhenjiang 212013, China
| | - Xueshan Wu
- School of Chemistry and Chemical Engineering, Jiangsu University, Xuefu Rd. 301, Zhenjiang 212013, China
| | - Weiwei Feng
- School of Food and Biological Engineering, Jiangsu University, Xuefu Rd. 301, Zhenjiang 212013, Jiangsu, China
| | - Wei Wang
- School of Food and Biological Engineering, Jiangsu University, Xuefu Rd. 301, Zhenjiang 212013, Jiangsu, China
| | - Qian Li
- School of Pharmacy, Jiangsu University, Xuefu Rd. 301, Zhenjiang 212013, Jiangsu, China
| | - Ting Zhao
- School of Chemistry and Chemical Engineering, Jiangsu University, Xuefu Rd. 301, Zhenjiang 212013, China
| | - Guanghua Mao
- School of the Environment, Jiangsu University, Xuefu Rd. 301, Zhenjiang 212013, Jiangsu, China
| | - Xiangyang Wu
- School of the Environment, Jiangsu University, Xuefu Rd. 301, Zhenjiang 212013, Jiangsu, China.
| | - Liuqing Yang
- School of Chemistry and Chemical Engineering, Jiangsu University, Xuefu Rd. 301, Zhenjiang 212013, China.
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17
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Sanders AP, Miller SK, Nguyen V, Kotch JB, Fry RC. Toxic metal levels in children residing in a smelting craft village in Vietnam: a pilot biomonitoring study. BMC Public Health 2014; 14:114. [PMID: 24495283 PMCID: PMC3922956 DOI: 10.1186/1471-2458-14-114] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2013] [Accepted: 01/02/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND In Vietnam, environmental pollution caused by small-scale domestic smelting of automobile batteries into lead ingot is a growing concern. The village of Nghia Lo is a smelting craft village located roughly 25 km southeast of Hanoi in the Red River Delta. Despite the concern of toxic metal exposure in the village, biomonitoring among susceptible populations, such as children, has not been previously conducted. The aim of this study was to determine the body burden of toxic metals in children residing in a smelting craft village. METHODS Twenty children from Nghia Lo, Vietnam, ages 18 months to four years were selected for capillary whole blood and toenail biomonitoring. Whole blood lead levels (BLLs) were measured using a portable lead analyzer, and toenail levels of arsenic, cadmium, chromium, lead, manganese, and mercury were analyzed with inductively coupled plasma-mass spectrometry. RESULTS The findings show that all of the 20 children had detectable BLLs, and every child had levels that exceeded the Centers for Disease Control and Prevention guideline level of 5 μg/dL. Eighty percent of tested subjects had BLLs higher than 10 μg/dL. Five children (25%) had BLLs greater than 45 μg/dL, the level of recommended medical intervention. In addition to blood lead, all of the children had detectable levels of arsenic, cadmium, chromium, lead, manganese, and mercury in toenail samples. Notably, average toenail lead, manganese, and mercury levels were 157 μg/g, 7.41 μg/g, and 2.63 μg/g respectively, well above levels previously reported in children. Significant Spearman's rank correlations showed that there were relationships between blood and toenail lead levels (r = 0.65, p < 0.05), toenail levels of lead and cadmium (r = 0.66, p < 0.05), and toenail levels of manganese and chromium (r = 0.72, p < 0.001). Linear regression showed that reducing the distance to the nearest active smelter by half was associated with a 116% increase in BLL (p < 0.05). CONCLUSIONS The results suggest that children in battery recycling and smelting craft villages in Vietnam are co-exposed to toxic metals. There is an urgent need for mitigation to control metal exposure related to domestic smelting.
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Affiliation(s)
| | | | | | | | - Rebecca C Fry
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina - Chapel Hill, Chapel Hill, North Carolina, USA.
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18
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Charles J, Crini G, Degiorgi F, Sancey B, Morin-Crini N, Badot PM. Unexpected toxic interactions in the freshwater amphipod Gammarus pulex (L.) exposed to binary copper and nickel mixtures. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2014; 21:1099-1111. [PMID: 23872894 DOI: 10.1007/s11356-013-1978-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2013] [Accepted: 07/02/2013] [Indexed: 06/02/2023]
Abstract
To document the toxicity of copper and nickel in binary mixtures, freshwater amphipods Gammarus pulex were exposed to the metals given independently or as mixtures. Toxicity to Cu alone was relatively high: 96-h LC10 and LC50 were found at 91 and 196 μg L(-1), respectively. Toxicity to Ni alone was very low, with 96-h LC10 and LC50 of 44,900 and 79,200 μg L(-1), respectively. Mixture toxicities were calculated from single toxicity data using conventional models. Modeled toxicity was then compared with the measured toxicity of the binary mixture. Two kinds of mixtures were tested. Type I mixtures were designed as combinations of Cu and Ni given at the same effect concentrations, when taken independently, to identify possible interactions between copper and nickel. In type II mixtures, Cu concentrations varied from 0 to 600 μg L(-1) while the nickel concentration was kept constant at 500 μg L(-1) to mimic conditions of industrial wastewater discharges. Ni and Cu showed synergic effects in type I mixtures while type II mixtures revealed antagonistic effects. Low doses of Ni reduced Cu toxicity towards G. pulex. These results show that even for simple binary mixtures of contaminants with known chemistry and toxicity, unexpected interactions between the contaminants may occur. This reduces the reliability of conventional additivity models.
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Affiliation(s)
- Jérémie Charles
- UMR CNRS 6249 USC INRA Chrono-Environnement, Université de Franche-Comté, Place Leclerc, 25030, Besançon, France
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Vellinger C, Gismondi E, Felten V, Rousselle P, Mehennaoui K, Parant M, Usseglio-Polatera P. Single and combined effects of cadmium and arsenate in Gammarus pulex (Crustacea, Amphipoda): understanding the links between physiological and behavioural responses. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2013; 140-141:106-116. [PMID: 23770824 DOI: 10.1016/j.aquatox.2013.05.010] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2012] [Revised: 05/06/2013] [Accepted: 05/13/2013] [Indexed: 06/02/2023]
Abstract
This study aimed at investigating the individual and interactive effects of cadmium (Cd) and arsenate (AsV) in Gammarus pulex (Crustacea, Amphipoda) through the use of several biomarkers. Individuals were exposed for 240 h to two concentrations of AsV or Cd alone, and all the possible binary mixtures of these concentrations of AsV and Cd in a complete factorial design. The pattern of the biomarkers' responses to Cd and AsV alone or in mixture was similar in Gammarus pulex, even if the response intensity varied depending on the tested conditions. G. pulex responded to contamination with increased mobilization of the detoxification systems [i.e. γ-glutamyl-cystein ligase activity (GCL), reduced glutathione content (GSH) and metallothionein concentrations (MT)]. This response seems to imply changes in energy reserve utilization (total lipids and proteins are used prior to glycogen reserves), but also a possible energy reallocation from locomotion to detoxification processes. The observed increase in lipid peroxidation could be relied to the increasing gammarid mortality, despite the higher mobilization of detoxification systems. Even if the outcome of the complex interactions between AsV and Cd remains difficult to unravel, such studies are critically important for better assessing the effects of stressors on organisms, populations and communities in a multi-contamination context of ecosystems.
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Affiliation(s)
- Céline Vellinger
- Laboratoire Interdisciplinaire des Environnements Continentaux (LIEC), CNRS UMR 7360, Université de Lorraine - Metz, France.
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Vellinger C, Felten V, Sornom P, Rousselle P, Beisel JN, Usseglio-Polatera P. Behavioural and physiological responses of Gammarus pulex exposed to cadmium and arsenate at three temperatures: individual and combined effects. PLoS One 2012; 7:e39153. [PMID: 22761731 PMCID: PMC3382242 DOI: 10.1371/journal.pone.0039153] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2012] [Accepted: 05/16/2012] [Indexed: 11/19/2022] Open
Abstract
This study aimed at investigating both the individual and combined effects of cadmium (Cd) and arsenate (AsV) on the physiology and behaviour of the Crustacean Gammarus pulex at three temperatures (5, 10 and 15 °C). G. pulex was exposed during 96 h to (i) two [Cd] alone, (ii) two [AsV] alone, and (iii) four combinations of [Cd] and [AsV] to obtain a complete factorial plane. After exposure, survival, [AsV] or [Cd] in body tissues, behavioural (ventilatory and locomotor activities) and physiological responses (iono-regulation of [Na(+)] and [Cl(-)] in haemolymph) were examined. The interactive effects (antagonistic, additive or synergistic) of binary mixtures were evaluated for each tested temperature using a predictive model for the theoretically expected interactive effect of chemicals. In single metal exposure, both the internal metal concentration in body tissues and the mortality rate increased along metallic gradient concentration. Cd alone significantly impaired both [Na(+)] and [Cl(-)] while AsV alone had a weak impact only on [Cl(-)]. The behavioural responses of G. pulex declined with increasing metal concentration suggesting a reallocation of energy from behavioural responses to maintenance functions. The interaction between AsV and Cd was considered as 'additive' for all the tested binary mixtures and temperatures (except for the lowest combination at 10 °C considered as "antagonistic"). In binary mixtures, the decrease in both ventilatory and locomotor activities and the decline in haemolymphatic [Cl(-)] were amplified when respectively compared to those observed with the same concentrations of AsV or Cd alone. However, the presence of AsV decreased the haemolymphatic [Na(+)] loss when G. pulex was exposed to the lowest Cd concentration. Finally, the observed physiological and behavioural effects (except ventilation) in G. pulex exposed to AsV and/or Cd were exacerbated under the highest temperature. The discussion encompasses both the toxicity mechanisms of these metals and their interaction with rising temperature.
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Affiliation(s)
- Céline Vellinger
- Laboratoire des Interactions, Ecotoxicologie, Biodiversité, Ecosystèmes, CNRS UMR 7146, Université de Lorraine, Metz, France.
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