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Iovino P, Lavorgna M, Orlo E, Russo C, De Felice B, Campolattano N, Muscariello L, Fenti A, Chianese S, Isidori M, Musmarra D. An integrated approach for the assessment of the electrochemical oxidation of diclofenac: By-product identification, microbiological and eco-genotoxicological evaluation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 909:168511. [PMID: 37977373 DOI: 10.1016/j.scitotenv.2023.168511] [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: 07/06/2023] [Revised: 11/09/2023] [Accepted: 11/09/2023] [Indexed: 11/19/2023]
Abstract
Diclofenac (DCF), a contaminant of emerging concern, is a non-steroidal anti-inflammatory drug widely detected in water bodies, which demonstrated harmful acute and chronic toxicity toward algae, zooplankton and aquatic invertebrates, therefore its removal from impacted water is necessary. DCF is recalcitrant toward traditional treatment technologies, thus, innovative approaches are required. Among them, electrochemical oxidation (EO) has shown promising results. In this research, an innovative multidisciplinary approach is proposed to assess the electrochemical oxidation (EO) of diclofenac from wastewater by integrating the investigations on the removal efficiency and by-product identification with the disinfection capacity and the assessment of the effect on environmental geno-toxicity of by-products generated through the oxidation. The electrochemical treatment successfully degraded DCF by achieving >98 % removal efficiency, operating with NaCl 0.02 M at 50 A m-2. By-product identification analyses showed the formation of five DCF parental compounds generated by decarboxylic and CN cleavage reactions. The disinfection capacity of the EO technique was evaluated by carrying out microbiological tests on pathogens generally found in aquatic environments, including two rod-shaped Gram-negative bacteria (Pseudomonas aeruginosa and Escherichia coli), one rod-shaped Gram-positive bacterium (Bacillus atrophaeus), and one Gram-positive coccus (Enterococcus hirae). Eco-toxicity was evaluated in freshwater organisms (algae, rotifers and crustaceans) belonging to two trophic levels through acute and chronic tests. Genotoxicity tests were carried out by Comet assay, and relative expression levels of catalase, manganese and copper superoxide dismutase genes in crustaceans. Results highlight the effectiveness of EO for the degradation of diclofenac and the inactivation of pathogens; however, the downstream mixture results in being harmful to the aquatic ecosystem.
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Affiliation(s)
- P Iovino
- Department of Environmental, Biological and Pharmaceutical Sciences and Technologies, University of Campania "Luigi Vanvitelli", Via Vivaldi 43, Caserta 81100, Italy
| | - M Lavorgna
- Department of Environmental, Biological and Pharmaceutical Sciences and Technologies, University of Campania "Luigi Vanvitelli", Via Vivaldi 43, Caserta 81100, Italy
| | - E Orlo
- Department of Environmental, Biological and Pharmaceutical Sciences and Technologies, University of Campania "Luigi Vanvitelli", Via Vivaldi 43, Caserta 81100, Italy
| | - C Russo
- Department of Environmental, Biological and Pharmaceutical Sciences and Technologies, University of Campania "Luigi Vanvitelli", Via Vivaldi 43, Caserta 81100, Italy.
| | - B De Felice
- Department of Environmental, Biological and Pharmaceutical Sciences and Technologies, University of Campania "Luigi Vanvitelli", Via Vivaldi 43, Caserta 81100, Italy
| | - N Campolattano
- Department of Environmental, Biological and Pharmaceutical Sciences and Technologies, University of Campania "Luigi Vanvitelli", Via Vivaldi 43, Caserta 81100, Italy
| | - L Muscariello
- Department of Environmental, Biological and Pharmaceutical Sciences and Technologies, University of Campania "Luigi Vanvitelli", Via Vivaldi 43, Caserta 81100, Italy
| | - A Fenti
- Department of Engineering, University of Campania "Luigi Vanvitelli", Via Roma 29, Aversa 81031, Italy.
| | - S Chianese
- Department of Engineering, University of Campania "Luigi Vanvitelli", Via Roma 29, Aversa 81031, Italy
| | - M Isidori
- Department of Environmental, Biological and Pharmaceutical Sciences and Technologies, University of Campania "Luigi Vanvitelli", Via Vivaldi 43, Caserta 81100, Italy
| | - D Musmarra
- Department of Engineering, University of Campania "Luigi Vanvitelli", Via Roma 29, Aversa 81031, Italy
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Huertas-Abril PV, Jurado J, Prieto-Álamo MJ, García-Barrera T, Abril N. Proteomic analysis of the hepatic response to a pollutant mixture in mice. The protective action of selenium. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 903:166558. [PMID: 37633382 DOI: 10.1016/j.scitotenv.2023.166558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 08/22/2023] [Accepted: 08/23/2023] [Indexed: 08/28/2023]
Abstract
Metals and pharmaceuticals contaminate water and food worldwide, forming mixtures where they can interact to enhance their individual toxicity. Here we use a shotgun proteomic approach to evaluate the toxicity of a pollutant mixture (PM) of metals (As, Cd, Hg) and pharmaceuticals (diclofenac, flumequine) on mice liver proteostasis. These pollutants are abundant in the environment, accumulate in the food chain, and are toxic to humans primarily through oxidative damage. Thus, we also evaluated the putative antagonistic effect of low-dose dietary supplementation with the antioxidant trace element selenium. A total of 275 proteins were affected by PM treatment. Functional analyses revealed an increased abundance of proteins involved in the integrated stress response that promotes translation, the inflammatory response, carbohydrate and lipid metabolism, and the sustained expression of the antioxidative response mediated by NRF2. As a consequence, a reductive stress situation arises in the cell that inhibits the RICTOR pathway, thus activating the early stage of autophagy, impairing xenobiotic metabolism, and potentiating lipid biosynthesis and steatosis. PM exposure-induced hepato-proteostatic alterations were significantly reduced in Se supplemented mice, suggesting that the use of this trace element as a dietary supplement may at least partially ameliorate liver damage caused by exposure to environmental mixtures.
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Affiliation(s)
- Paula V Huertas-Abril
- Department of Biochemistry and Molecular Biology, University of Córdoba, Campus de Rabanales, Edificio Severo Ochoa, E-14071 Córdoba, Spain
| | - Juan Jurado
- Department of Biochemistry and Molecular Biology, University of Córdoba, Campus de Rabanales, Edificio Severo Ochoa, E-14071 Córdoba, Spain
| | - María-José Prieto-Álamo
- Department of Biochemistry and Molecular Biology, University of Córdoba, Campus de Rabanales, Edificio Severo Ochoa, E-14071 Córdoba, Spain
| | - Tamara García-Barrera
- Research Center of Natural Resources, Health, and the Environment (RENSMA), Department of Chemistry, Faculty of Experimental Sciences, Campus El Carmen, University of Huelva, Fuerzas Armadas Ave., 21007 Huelva, Spain
| | - Nieves Abril
- Department of Biochemistry and Molecular Biology, University of Córdoba, Campus de Rabanales, Edificio Severo Ochoa, E-14071 Córdoba, Spain.
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Van Nguyen T, Bořík A, Sims JL, Kouba A, Žlábek V, Koubová A. Toxicological effects of diclofenac on signal crayfish (Pacifastacus leniusculus) as related to weakly acidic and basic water pH. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2023; 265:106777. [PMID: 38035650 DOI: 10.1016/j.aquatox.2023.106777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 11/20/2023] [Accepted: 11/21/2023] [Indexed: 12/02/2023]
Abstract
The widespread use and continuous discharge of pharmaceuticals to environmental waters can lead to potential toxicity to aquatic biota. Pharmaceuticals and their metabolites are often complex organic and environmentally persistent compounds that are bioactive at low doses. This study aimed to investigate the effects of diclofenac (DCF) on the antioxidant defence system and neurotoxicity biomarkers in signal crayfish (Pacifastacus leniusculus) under weakly acidic and basic conditions. Crayfish were exposed to 200 µg/L of DCF at pH 6 and 8 for 96 h and subsequently underwent the depuration phase for 96 h. Gills, hepatopancreas, and muscle were sampled after the exposure and depuration phases to assess the toxicological biomarker responses of DCF in crayfish by evaluating lipid peroxidation (LPO) levels, activities of antioxidant enzymes and acetylcholinesterase. After the exposure phase, the hemolymph DCF concentration was detected one order higher at pH 6 than at pH 8. The DCF was subsequently fully eliminated from the hemolymph during the depuration phase. Our results showed that DCF caused alteration in the activities of six of the seven tested biomarkers in at least one crayfish tissue. Although exposure to DCF caused imbalances in the detoxification system on multiple tissue levels, it was regenerated to a balanced state after the depuration phase. Integrated biomarker response (IBRv2) showed that the highest toxicological response to DCF exposure was elicited in the gills, whereas the hepatopancreas was the highest-responding tissue after the depuration phase. Exposure to DCF at pH 6 caused higher toxicological effects than at pH 8; however, crayfish antioxidant mechanisms recovered more quickly at pH 6 than at pH 8 after the depuration phase. Our results showed that water pH influenced the toxicological effects of DCF, an ionisable compound in crayfish.
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Affiliation(s)
- Tuyen Van Nguyen
- Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, University of South Bohemia in České Budějovice, Zátiší 728/II, Vodňany CZ-389 25, Czech Republic
| | - Adam Bořík
- Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, University of South Bohemia in České Budějovice, Zátiší 728/II, Vodňany CZ-389 25, Czech Republic
| | - Jaylen L Sims
- Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, University of South Bohemia in České Budějovice, Zátiší 728/II, Vodňany CZ-389 25, Czech Republic; Department of Environmental Science, Center for Reservoir and Aquatic Systems Research, Baylor University, Waco, TX, USA
| | - Antonín Kouba
- Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, University of South Bohemia in České Budějovice, Zátiší 728/II, Vodňany CZ-389 25, Czech Republic
| | - Vladimír Žlábek
- Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, University of South Bohemia in České Budějovice, Zátiší 728/II, Vodňany CZ-389 25, Czech Republic
| | - Anna Koubová
- Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, University of South Bohemia in České Budějovice, Zátiší 728/II, Vodňany CZ-389 25, Czech Republic.
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Ellepola N, Viera T, Patidar PL, Rubasinghege G. Fate, transformation and toxicological implications of environmental diclofenac: Role of mineralogy and solar flux. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 246:114138. [PMID: 36201921 DOI: 10.1016/j.ecoenv.2022.114138] [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: 04/23/2022] [Revised: 09/22/2022] [Accepted: 09/28/2022] [Indexed: 06/16/2023]
Abstract
Diclofenac is an emerging surface water contaminant, yet the environmental impact of its degradation products remains elusive. The current study focuses on mineralogy-controlled diclofenac photo-degradation and its potential health impacts. Under irradiated conditions, we studied the effects of kaolinite, hematite, and anatase on diclofenac degradation. Our results showed that kaolinite doubled the diclofenac degradation rate, which can be attributed to the high catalytic effect, mediated via increased surface area and pore size of mineral surface in the low pH. Conversely, anatase, a crystal phase of titanium dioxide (TiO2), diminished the diclofenac degradation compared to treatments without TiO2. Hematite, on the other hand, showed no effect on diclofenac degradation. Photo-degradation products also varied with the mineral surface. We further assessed in vitro toxicological effects of photo-degraded products on two human cell lines, HEK293T and HepG2. Biological assays confirmed that photo-degraded compound 6 (1-(2,6-dichlorophenyl)indolin-2-one) decreased HEK293T cell survival significantly (p < 0.05) when compared to diclofenac in all concentrations. At lower concentrations, inhibition of HEK293T cells caused by compounds 4 (2-(8-chloro-9H-carbazol-1-yl)acetic acid), and 5 (2-(9H-carbazol-1-yl)acetic acid) was greater than diclofenac. Compound 7 (1-phenylindolin-2-one) was toxic only at 250 µM. Additionally, compound 6 decreased HepG2 cell viability significantly when compared to diclofenac. Overall, our data highlighted that mineralogy plays a vital role in environmental diclofenac transformation and its photo-degraded products. Some photo-degraded compounds can be more cytotoxic than the parent compound, diclofenac.
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Affiliation(s)
- Nishanthi Ellepola
- Department of Chemistry, New Mexico Institute of Mining and Technology, Socorro, NM 87801, USA
| | - Talysa Viera
- Department of Chemistry, New Mexico Institute of Mining and Technology, Socorro, NM 87801, USA
| | - Praveen L Patidar
- Department of Chemistry, New Mexico Institute of Mining and Technology, Socorro, NM 87801, USA
| | - Gayan Rubasinghege
- Department of Chemistry, New Mexico Institute of Mining and Technology, Socorro, NM 87801, USA.
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Sousa B, Lopes J, Leal A, Martins M, Soares C, Azenha M, Fidalgo F, Teixeira J. Specific glutathione-S-transferases ensure an efficient detoxification of diclofenac in Solanum lycopersicum L. plants. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2021; 168:263-271. [PMID: 34666279 DOI: 10.1016/j.plaphy.2021.10.019] [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: 07/17/2021] [Revised: 09/21/2021] [Accepted: 10/14/2021] [Indexed: 06/13/2023]
Abstract
Diclofenac (DCF) is a very common pharmaceutical that, due to its high use and low removal rate, is considered a prominent contaminant in surface and groundwater worldwide. In this study, Solanum lycopersicum L. cv. Micro-Tom (tomato) was used to disclose the role of glutathione (GSH)-related enzymes, as GSH conjugation with DCF is a well reported detoxification mechanism in mammals and some plant species. To achieve this, S. lycopersicum plants were exposed to 0.5 and 5 mg L-1 of DCF for 5 weeks under a semi-hydroponic experiment. The results here obtained point towards an efficient DCF detoxification mechanism that prevents DCF bioaccumulation in fruits, minimizing any concerns for human health. Although a systemic response seems to be present in response to DCF, the current data also shows that its detoxification is mostly a root-specific process. Furthermore, it appears that GSH-mediated DCF detoxification is the main mechanism activated, as glutathione-S-transferase (GST) activity was greatly enhanced in roots of tomato plants treated with 5 mg L-1 DCF, accompanied by increased glutathione reductase activity, responsible for GSH regeneration. By applying a targeted gene expression analysis, we provide evidence, for the first time, that SlGSTF4 and SlGSTF5 genes, coding for GSTs from phi class, were the main players driving the conjugation of this contaminant. In this sense, and even though tomato plants appear to be somewhat tolerant to DCF exposure, research on GST activity can prove to be instrumental in remediating DCF-contaminated environments and improving plant growth under such conditions.
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Affiliation(s)
- Bruno Sousa
- GreenUPorto - Sustainable Agrifood Production Research Centre and Inov4Agro, Biology Department, Faculty of Sciences of University of Porto, Rua do Campo Alegre s/n, 4169-007, Porto, Portugal.
| | - Jorge Lopes
- GreenUPorto - Sustainable Agrifood Production Research Centre and Inov4Agro, Biology Department, Faculty of Sciences of University of Porto, Rua do Campo Alegre s/n, 4169-007, Porto, Portugal
| | - André Leal
- GreenUPorto - Sustainable Agrifood Production Research Centre and Inov4Agro, Biology Department, Faculty of Sciences of University of Porto, Rua do Campo Alegre s/n, 4169-007, Porto, Portugal
| | - Maria Martins
- GreenUPorto - Sustainable Agrifood Production Research Centre and Inov4Agro, Biology Department, Faculty of Sciences of University of Porto, Rua do Campo Alegre s/n, 4169-007, Porto, Portugal
| | - Cristiano Soares
- GreenUPorto - Sustainable Agrifood Production Research Centre and Inov4Agro, Biology Department, Faculty of Sciences of University of Porto, Rua do Campo Alegre s/n, 4169-007, Porto, Portugal
| | - Manuel Azenha
- CIQ-UP, Chemistry and Biochemistry Department, Faculty of Sciences of University of Porto, Rua do Campo Alegre s/n, 4169-007, Porto, Portugal
| | - Fernanda Fidalgo
- GreenUPorto - Sustainable Agrifood Production Research Centre and Inov4Agro, Biology Department, Faculty of Sciences of University of Porto, Rua do Campo Alegre s/n, 4169-007, Porto, Portugal
| | - Jorge Teixeira
- GreenUPorto - Sustainable Agrifood Production Research Centre and Inov4Agro, Biology Department, Faculty of Sciences of University of Porto, Rua do Campo Alegre s/n, 4169-007, Porto, Portugal
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Mauro M, Lazzara V, Arizza V, Luparello C, Ferrantelli V, Cammilleri G, Inguglia L, Vazzana M. Human Drug Pollution in the Aquatic System: The Biochemical Responses of Danio rerio Adults. BIOLOGY 2021; 10:biology10101064. [PMID: 34681162 PMCID: PMC8533377 DOI: 10.3390/biology10101064] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 10/08/2021] [Accepted: 10/12/2021] [Indexed: 12/26/2022]
Abstract
Simple Summary The release of medicinal products for human use in the aquatic environment is now a serious problem, and can be fatal for the organisms that live there. Danio rerio is a freshwater fish that provides the possibility to study the effects of these pollutants on the health of aquatic organisms. The results of the various existing scientific studies are scarce and conflicting. Here, we review the scientific studies that have analyzed these effects, highlighting that the impacts of drugs are evident in the biochemical responses of these animals. Abstract To date, drug pollution in aquatic systems is an urgent issue, and Danio rerio is a model organism to study the toxicological effects of environmental pollutants. The scientific literature has analyzed the effect of human drug pollution on the biochemical responses in the tissues of D. rerio adults. However, the information is still scarce and conflicting, making it difficult to understand its real impact. The scientific studies are not consistent with each other and, until now, no one has grouped their results to create a baseline of knowledge of the possible impacts. In this review, the analysis of literature data highlights that the effects of drugs on adult zebrafishes depend on various factors, such as the tissue analyzed, the drug concentration and the sex of the individuals. Furthermore, the most influenced biochemical responses concern enzymes (e.g., antioxidants and hydrolase enzymes) and total protein and hormonal levels. Pinpointing the situation to date would improve the understanding of the chronic effects of human drug pollution, helping both to reduce it in the aquatic systems and then to draw up regulations to control this type of pollution.
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Affiliation(s)
- Manuela Mauro
- Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche (STEBICEF), Università degli Studi di Palermo, 90128 Palermo, Italy; (V.L.); (V.A.); (C.L.); (L.I.); (M.V.)
- Correspondence: (M.M.); (V.F.)
| | - Valentina Lazzara
- Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche (STEBICEF), Università degli Studi di Palermo, 90128 Palermo, Italy; (V.L.); (V.A.); (C.L.); (L.I.); (M.V.)
| | - Vincenzo Arizza
- Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche (STEBICEF), Università degli Studi di Palermo, 90128 Palermo, Italy; (V.L.); (V.A.); (C.L.); (L.I.); (M.V.)
| | - Claudio Luparello
- Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche (STEBICEF), Università degli Studi di Palermo, 90128 Palermo, Italy; (V.L.); (V.A.); (C.L.); (L.I.); (M.V.)
| | - Vincenzo Ferrantelli
- Istituto Zooprofilattico Sperimentale della Sicilia A. Mirri, 90129 Palermo, Italy;
- Correspondence: (M.M.); (V.F.)
| | - Gaetano Cammilleri
- Istituto Zooprofilattico Sperimentale della Sicilia A. Mirri, 90129 Palermo, Italy;
| | - Luigi Inguglia
- Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche (STEBICEF), Università degli Studi di Palermo, 90128 Palermo, Italy; (V.L.); (V.A.); (C.L.); (L.I.); (M.V.)
| | - Mirella Vazzana
- Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche (STEBICEF), Università degli Studi di Palermo, 90128 Palermo, Italy; (V.L.); (V.A.); (C.L.); (L.I.); (M.V.)
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Ajima MNO, Kumar K, Poojary N, Pandey PK. Sublethal diclofenac induced oxidative stress, neurotoxicity, molecular responses and alters energy metabolism proteins in Nile tilapia, Oreochromis niloticus. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:44494-44504. [PMID: 33855662 DOI: 10.1007/s11356-021-13899-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Accepted: 04/07/2021] [Indexed: 06/12/2023]
Abstract
Reports have shown that residues of pharmaceuticals and their metabolites can pose toxicological threats to organisms living in aquatic ecosystem. Nile tilapia, Oreochromis niloticus, was exposed at 0.17, 0.34, and 0.68 mg L-1 of diclofenac up to 60 days in a renewal static bioassay system. Antioxidant enzymes reactions, molecular responses, activities of energy metabolism proteins, and the neurotoxic potentials of the drug in the brain and fish muscle were evaluated. Antioxidant enzyme activities such as superoxide dismutase, glutathione-S-transferase, and also fructose 1, 6 bisphosphatase and glucose-6-phosphate dehydrogenase as well as the levels of lipid peroxidation and protein carbonyl were elevated, while glutathione peroxidase, total reduced glutathione, and acetylcholinesterase in the brain and muscles of the treated groups were significantly inhibited in a dose-dependent association. Expression of superoxide dismutase (sod), catalase (cat), and heat shock proteins (hsp 70) genes in brain and muscle tissues was up-regulated. Continuous treatment with sublethal diclofenac for a long time can induce oxidative imbalance, cause neurotoxicity, and alter the expression of genes related to stress in Nile tilapia, suggesting the use of these biomarkers in monitoring the adverse effects the pharmaceuticals could cause to organisms in aquatic ecosystem for possible mitigation.
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Affiliation(s)
- Malachy N O Ajima
- Department of Fisheries and Aquaculture Technology, Federal University of Technology, Owerri, Nigeria.
| | - Kundan Kumar
- Aquatic Environment and Health Management Division, ICAR, Central Institute of Fisheries Education, Mumbai, India
| | - Nalini Poojary
- Aquatic Environment and Health Management Division, ICAR, Central Institute of Fisheries Education, Mumbai, India
| | - Pramod K Pandey
- College of Fisheries, Central Agriculture University, Agartala, Tripura, India
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Ramesh M, Sujitha M, Anila PA, Ren Z, Poopal RK. Responses of Cirrhinus mrigala to second-generation fluoroquinolone (ciprofloxacin) toxicity: Assessment of antioxidants, tissue morphology, and inorganic ions. ENVIRONMENTAL TOXICOLOGY 2021; 36:887-902. [PMID: 33382204 DOI: 10.1002/tox.23091] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Accepted: 12/19/2020] [Indexed: 06/12/2023]
Abstract
Ciprofloxacin drugs are a second-generation fluoroquinolone highly prescribed medication against various bacterial infections in human and aquaculture practices. These drugs are chemically designed to persist in the body long enough to achieve target objectives. Extensive usage has resulted in ciprofloxacin becoming a ubiquitous contaminant in the environment. Unfortunately, the ecotoxicological profiles for ciprofloxacin are scanty. This study was aimed to assess the ecotoxicity of ciprofloxacin at environmentally relevant concentrations (1 μg/L, and 1.5 μg/L) to a cultivable fish Cirrhinus mrigala. Responses of antioxidant enzymes, histological anomalies, and inorganic ion levels were studied. SOD activity in gill, liver, and kidney tissues was elevated in ciprofloxacin-exposed groups when compared with the control group. CAT activity was predominantly decreased in ciprofloxacin treated groups relative to the control group. GST activity in the ciprofloxacin treated groups was increased (except kidney tissues [Treatment I (1 μg/L)], and gill tissues fifteenth day) significantly (p < .05). The LPO level was elevated in the ciprofloxacin treatment groups throughout the study period (except Treatment II (1.5 μg/L) tenth day in kidney tissues). A series of histological anomalies were noticed in the gill, liver, and kidney tissues of the ciprofloxacin treated groups. Ciprofloxacin exposure caused a significant decrease of sodium, potassium, and chloride levels in the plasma of C. mrigala. A parallel among an imbalanced oxidative defense system, tissue structural changes, and alterations of plasma inorganic ions could be considered as a reliable biomarker for antibiotic toxicity study. This study could be a primary platform for further toxicity studies to understand the potential molecular impacts and adverse effects of ciprofloxacin on aquatic organisms.
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Affiliation(s)
- Mathan Ramesh
- Institute of Environment and Ecology, Shandong Normal University, Jinan, China
- Unit of Toxicology, Department of Zoology, School of Life Sciences, Bharathiar University, Coimbatore, Tamil Nadu, India
| | - Madhavan Sujitha
- Unit of Toxicology, Department of Zoology, School of Life Sciences, Bharathiar University, Coimbatore, Tamil Nadu, India
| | - Pottanthara Ashokan Anila
- Unit of Toxicology, Department of Zoology, School of Life Sciences, Bharathiar University, Coimbatore, Tamil Nadu, India
| | - Zongming Ren
- Institute of Environment and Ecology, Shandong Normal University, Jinan, China
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Penha LCDC, Rola RC, Martinez CBDR, Martins CDMG. Effects of anti-inflammatory diclofenac assessed by toxicity tests and biomarkers in adults and larvae of Danio rerio. Comp Biochem Physiol C Toxicol Pharmacol 2021; 242:108955. [PMID: 33338643 DOI: 10.1016/j.cbpc.2020.108955] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Revised: 12/09/2020] [Accepted: 12/11/2020] [Indexed: 12/28/2022]
Abstract
The entrance of the anti-inflammatory diclofenac in water bodies is a consequence of inappropriate use, incorrect disposal, and inefficiency of wastewater treatment plants (WWTPs) in removing this drug from sewage, among others. Effects of diclofenac on non-target aquatic organisms still need to be clarified. The objective of this work was to evaluate the toxic effects of the diclofenac on larvae and adults of Danio rerio. The LC50 values were 5.49 mg/L and 5.22 mg/L for the adult and larvae, respectively. A set of biochemical and genotoxic biomarkers were evaluated in fish exposed to an environmentally relevant concentration of 2 μg/L DCF and a no observed effect concentration (NOEC) of 3 mg/L diclofenac. At the NOEC, an increase in activities of glutathione-S-transferase (GST) enzyme and an increase in ATP binding cassette (ABC) transporters in gills of adult fish was observed; also, an increase in lipoperoxidation (LPO) was seen in the gills of adults and whole larvae. These results indicate that diclofenac activates the fish detoxification processes and may affect fish health.
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Affiliation(s)
- Larissa Cristine de Carvalho Penha
- Universidade Federal do Rio Grande, Instituto de Ciências Biológicas, Programa de Pós-Graduação em Biologia de ambientes Aquáticos Continentais, Av. Itália km 8, 96203-900 Rio Grande, RS, Brazil
| | - Regina Coimbra Rola
- Universidade Federal do Rio Grande, Instituto de Ciências Biológicas, Programa de Pós-Graduação em Ciências Fisiológicas, Av. Itália km 8, 96203-900 Rio Grande, RS, Brazil.
| | - Claudia Bueno Dos Reis Martinez
- Universidade Estadual de Londrina, Departamento de Ciências Fisiológicas, Rodovia Celso Garcia Cid - PR 445 Km 380 Cx. Postal 10.011 - Campus Universitário, PR 86057-970, Brazil.
| | - Camila de Martinez Gaspar Martins
- Universidade Federal do Rio Grande, Instituto de Ciências Biológicas, Programa de Pós-Graduação em Biologia de ambientes Aquáticos Continentais, Av. Itália km 8, 96203-900 Rio Grande, RS, Brazil; Universidade Federal do Rio Grande, Instituto de Ciências Biológicas, Programa de Pós-Graduação em Ciências Fisiológicas, Av. Itália km 8, 96203-900 Rio Grande, RS, Brazil.
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10
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Indicator Compounds Representative of Contaminants of Emerging Concern (CECs) Found in the Water Cycle in the United States. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18031288. [PMID: 33535451 PMCID: PMC7908579 DOI: 10.3390/ijerph18031288] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 01/29/2021] [Accepted: 01/29/2021] [Indexed: 01/31/2023]
Abstract
The presence of contaminants of emerging concern (CECs) in the aquatic environment has recently become a global issue. The very large number of CECs reported in the literature makes it difficult to interpret potential risks as well as the removal efficiencies, especially for the more recalcitrant compounds. As such, there is a need for indicator compounds that are representative of CECs detected in systems worldwide. In an effort to develop such a list, five criteria were used to address the potential for applying indicator compounds; these criteria include usage, occurrence, resistance to treatment, persistence, and physicochemical properties that shed light on the potential degradability of a class of compounds. Additional constraints applied included the feasibility of procuring and analyzing compounds. In total, 22 CECs belonging to 13 groups were selected as indicator compounds. These compounds include acetaminophen and ibuprofen (analgesic); erythromycin, sulfamethoxazole, and trimethoprim (antibiotics); diazepam and fluoxetine (antidepressants); carbamazepine (antiepileptic); atenolol and propranolol (β-blockers); gemfibrozil (blood lipid regulator); tris(2-chloroethyl)phosphate (TCEP) (fire retardant); cotinine (nicotine metabolite); atrazine, metolachlor, and N,N-diethyl-meta-toluamide (DEET) (pesticides); 17β-estradiol and cholesterol (steroids); caffeine (psychomotor stimulant); perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) (surfactants); and iopromide (X-ray contrast agent). These thirteen groups of compounds represent CECs with the greatest resistance to treatment processes, most persistent in surface waters, and detected with significant frequency throughout the water cycle. Among the important implications of using indicator compounds are the ability to better understand the efficacy of treatment processes as well as the transport and fate of these compounds in the environment.
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11
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Nkoom M, Lu G, Liu J, Dong H. Biological uptake, depuration and biochemical effects of diclofenac and carbamazepine in Carassius carassius. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 205:111106. [PMID: 32818877 DOI: 10.1016/j.ecoenv.2020.111106] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Revised: 07/25/2020] [Accepted: 07/28/2020] [Indexed: 05/21/2023]
Abstract
The uptake and depuration kinetics of diclofenac and carbamazepine alone at an environmentally relevant nominal concentration of 2 μg/L and in combination at a concentration ratio of 1:1 with total concentration of 4 μg/L were evaluated in Carassius carassius after 7 d uptake and depuration. Also, the biochemical effects of both drugs alone at nominal concentrations of 2 and 10 μg/L as well as in combination with total concentrations of 4 and 20 μg/L were investigated in Carassius carassius after 7 d exposure followed by 10 d recovery. In the single treatments, steady-state BCFs measured after the 7 d exposure were 73.05, 49.71, 38.01 and 24.93 L/kg for diclofenac and 9.25, 8.99, 5.29 and 4.11 L/kg for carbamazepine in the liver, brain, gill and muscle of Carassius carassius, respectively. Comparatively lower BCFs were measured in the tissues of Carassius carassius for both drugs in the combined treatments. Acetylcholinesterase activity in the brain was significantly induced by diclofenac while carbamazepine and the mixtures significantly inhibited it during all the exposure days as well as after the 10 d recovery in all treatments. This indicates that Carassius carassius could not recover from the neurotoxic effects caused by carbamazepine unlike the inductive effect caused by diclofenac which was recoverable after 10 days. A significant increase in the activities of 7-ethoxyresorufin O-deethylase and glutathione s-transferase for individual and mixed pharmaceuticals suggest that metabolism and detoxification of both drugs took place in the liver of Carassius carassius. Also, a significant increase in the activities of superoxide dismutase, catalase, glutathione reductase and malondialdehyde contents in the individual and mixture treatments mean that the antioxidant defence system of Carassius carassius was triggered to fight against oxidative stress but lipid peroxidation still occurred. However, Carassius carassius recovered from all these increases (superoxide dismutase, catalase, glutathione reductase and malondialdehyde) after the 10 d recovery, suggesting that oxidative damage is reversible. Our results indicate that both drugs at environmentally relevant concentrations might cause adverse effects in Carassius carassius and other fish species.
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Affiliation(s)
- Matthew Nkoom
- Key Laboratory of Integrated Regulation and Resources Development of Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, China
| | - Guanghua Lu
- Key Laboratory of Integrated Regulation and Resources Development of Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, China; Water Conservancy Project & Civil Engineering College, Tibet Agriculture & Animal Husbandry University, Linzhi, 860000, China.
| | - Jianchao Liu
- Key Laboratory of Integrated Regulation and Resources Development of Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, China
| | - Huike Dong
- Key Laboratory of Integrated Regulation and Resources Development of Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, China
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Świacka K, Smolarz K, Maculewicz J, Caban M. Effects of environmentally relevant concentrations of diclofenac in Mytilus trossulus. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 737:139797. [PMID: 32521366 DOI: 10.1016/j.scitotenv.2020.139797] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 05/23/2020] [Accepted: 05/27/2020] [Indexed: 06/11/2023]
Abstract
The presence of pharmaceuticals in the marine environment is a growing problem of global importance. Although awareness of the significance of this issue is increasing, many questions related to the ecotoxicology of pharmaceuticals remain unclear. Diclofenac is one of the drugs most commonly detected in the marine environment and its potential toxicity has been previously highlighted, thus its impact on organisms deserves a special attention. Therefore, in this study, a thorough analysis of the effects of diclofenac on a condition and tissue level of a model representative of marine invertebrates - Mytilus trossulus - was performed. During the 25-day experiment, divided into exposure and depuration phases, bivalves were exposed to two environmentally relevant drug concentrations of 4 and 40 μg/L. The study showed that mussels absorb diclofenac in their tissues and the highest recorded concentration was 1.692 μg/g dw on day 8. Moreover, the content of diclofenac metabolites (4-OH and 5-OH diclofenac) was also examined, but they were not detected either in water or in tissues. Although exposure to low diclofenac concentrations did not significantly affect the condition index of organisms, changes in numerous histopathological parameters were noted. Performed histological examination provided additional valuable information on the influence of drugs on the functioning of invertebrates. Nevertheless, applicability of histopathological techniques in ecotoxicology of drugs requires additional evaluation in future studies.
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Affiliation(s)
- Klaudia Świacka
- Department of Marine Ecosystems Functioning, Institute of Oceanography, University of Gdansk, Av. Piłsudskiego 46, 81-378 Gdynia, Poland
| | - Katarzyna Smolarz
- Department of Marine Ecosystems Functioning, Institute of Oceanography, University of Gdansk, Av. Piłsudskiego 46, 81-378 Gdynia, Poland
| | - Jakub Maculewicz
- Department of Environmental Analysis, Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland.
| | - Magda Caban
- Department of Environmental Analysis, Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland
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13
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Xie Z, Gan Y, Tang J, Fan S, Wu X, Li X, Cheng H, Tang J. Combined effects of environmentally relevant concentrations of diclofenac and cadmium on Chironomus riparius larvae. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 202:110906. [PMID: 32800241 DOI: 10.1016/j.ecoenv.2020.110906] [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: 03/18/2020] [Revised: 06/12/2020] [Accepted: 06/15/2020] [Indexed: 06/11/2023]
Abstract
The nonsteroidal anti-inflammatory drug diclofenac (DCF) is considered a contaminant of emerging concern. DCF can co-exist with heavy metals in aquatic environments, causing unexpected risks to aquatic organisms. This study aimed to assess the combined effects of DCF and cadmium (Cd) at environmentally relevant concentrations on the bioconcentration and status of oxidative stress and detoxification in Chironomus riparius larvae. The larvae were exposed to DCF (2 and 20 μg L-1) and Cd (5 and 50 μg L-1) alone or in mixtures for 48 h. The combined exposure to DCF and Cd was found to reciprocally facilitate the accumulation of each compound in larvae compared with single exposures. As indicated by the antioxidant enzyme activities, reduced glutathione levels, and malondialdehyde contents, the low concentration of the mixture (2 μg L-1 DCF + 5 μg L-1 Cd) did not alter the oxidative stress status in larvae, while the high concentration of the mixture (20 μg L-1 DCF + 50 μg L-1 Cd) induced stronger oxidative damage to larvae compared with single exposures. The expression levels of eight genes (CuZnSOD, MnSOD, CAT, GSTd3, GSTe1, GSTs4, CYP4G, and CYP9AT2) significantly decreased due to the high concentration of the mixture compared with single exposures in most cases. Overall, the results suggest that the mixture of DCF and Cd might exert greater ecological risks to aquatic insects compared with their individual compounds.
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Affiliation(s)
- Zhengxin Xie
- Key Laboratory of Agri-food Safety of Anhui Province, School of Resources and Environment, Anhui Agricultural University, Hefei, 230036, China.
| | - Ying Gan
- Key Laboratory of Agri-food Safety of Anhui Province, School of Resources and Environment, Anhui Agricultural University, Hefei, 230036, China
| | - Jun Tang
- Key Laboratory of Agri-food Safety of Anhui Province, School of Resources and Environment, Anhui Agricultural University, Hefei, 230036, China
| | - Shisuo Fan
- Key Laboratory of Agri-food Safety of Anhui Province, School of Resources and Environment, Anhui Agricultural University, Hefei, 230036, China
| | - Xiangwei Wu
- Key Laboratory of Agri-food Safety of Anhui Province, School of Resources and Environment, Anhui Agricultural University, Hefei, 230036, China
| | - Xuede Li
- Key Laboratory of Agri-food Safety of Anhui Province, School of Resources and Environment, Anhui Agricultural University, Hefei, 230036, China; Hefei Scientific Observing and Experimental Station of Agro-Environment, Ministry of Agriculture, PR China
| | - Haomiao Cheng
- School of Environmental Science and Engineering, Yangzhou University, Yangzhou, 225127, Jiangsu, China
| | - Jie Tang
- Key Laboratory of Agri-food Safety of Anhui Province, School of Resources and Environment, Anhui Agricultural University, Hefei, 230036, China
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14
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Bio S, Nunes B. Acute effects of diclofenac on zebrafish: Indications of oxidative effects and damages at environmentally realistic levels of exposure. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2020; 78:103394. [PMID: 32320907 DOI: 10.1016/j.etap.2020.103394] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 04/07/2020] [Accepted: 04/09/2020] [Indexed: 06/11/2023]
Abstract
With the increasing awareness about the contamination of the aquatic environment by pharmaceuticals, there is a growing need to study their adverse effects on aquatic organisms. Diclofenac is a non-steroidal anti-inflammatory drug (NSAID), whose wide use contributes for its presence in freshwater ecosystems, increasing the probability of causing deleterious changes in aquatic biota. This study evaluated possible oxidative stress effects in Danio rerio embryos and larvae when exposed to a range of ecologically relevant concentrations of diclofenac. It was possible to conclude that diclofenac caused a scenario of oxidative stress, since all tested toxicological parameters were responsive to the drug. In general, diclofenac caused not only significant anti-oxidant adaptive responses for most levels of exposure, but also peroxidative damage. This work evidenced the responsiveness of D. rerio towards diclofenac in environmentally relevant concentrations, which shows that these organisms might face a scenario of oxidative stress in their natural habitat.
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Affiliation(s)
- Sofia Bio
- Departamento de Biologia, Universidade de Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
| | - Bruno Nunes
- Departamento de Biologia, Universidade de Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal; Centro de Estudos do Ambiente e do Mar (CESAM), Universidade de Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal.
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15
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Nunes B, Daniel D, Canelas GG, Barros J, Correia AT. Toxic effects of environmentally realistic concentrations of diclofenac in organisms from two distinct trophic levels, Hediste diversicolor and Solea senegalensis. Comp Biochem Physiol C Toxicol Pharmacol 2020; 231:108722. [PMID: 32032725 DOI: 10.1016/j.cbpc.2020.108722] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 01/17/2020] [Accepted: 02/01/2020] [Indexed: 12/30/2022]
Affiliation(s)
- Bruno Nunes
- Departamento de Biologia da Universidade de Aveiro/Departament of Biology of the University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal; Centro de Estudos do Ambiente e do Mar/Centre for Environmental and Marine Studies (CESAM), Campus de Santiago, Universidade de Aveiro, 3810-193 Aveiro, Portugal.
| | - David Daniel
- Departamento de Biologia da Universidade de Aveiro/Departament of Biology of the University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
| | - Gisela Gonçalves Canelas
- Faculdade de Ciências da Saúde da Universidade Fernando Pessoa/Faculty of Health Sciences of Fernando Pessoa University, (FCS/UFP), Rua Carlos da Maia 296, 4200-150 Porto, Portugal
| | - Joseane Barros
- Instituto de Ciências Biomédicas de Abel Salazar da Universidade do Porto/Institute of Biomedical Sciences Abel Salazar of the University of Porto, (ICBAS), Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
| | - Alberto Teodorico Correia
- Faculdade de Ciências da Saúde da Universidade Fernando Pessoa/Faculty of Health Sciences of Fernando Pessoa University, (FCS/UFP), Rua Carlos da Maia 296, 4200-150 Porto, Portugal; Centro Interdisciplinar de Investigação Marinha e Ambiental/Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos S/N, 4450-208 Matosinhos, Portugal
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16
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Nowakowska K, Giebułtowicz J, Kamaszewski M, Adamski A, Szudrowicz H, Ostaszewska T, Solarska-Dzięciołowska U, Nałęcz-Jawecki G, Wroczyński P, Drobniewska A. Acute exposure of zebrafish (Danio rerio) larvae to environmental concentrations of selected antidepressants: Bioaccumulation, physiological and histological changes. Comp Biochem Physiol C Toxicol Pharmacol 2020; 229:108670. [PMID: 31733407 DOI: 10.1016/j.cbpc.2019.108670] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 10/09/2019] [Accepted: 11/12/2019] [Indexed: 12/13/2022]
Abstract
Antidepressants have been detected in surface waters worldwide at ng-μg/L concentration. These compounds can exert adverse effects on fish even at low levels. But, all previous analyses have concentrated on adult fish. The aim of the study was to assess the effect of environmental concentrations of sertraline, paroxetine, fluoxetine and mianserin, and their mixtures on such unusual endpoints as physiological and histological changes of zebrafish (Danio rerio) larvae. We also determined the bioconcentration of the pharmaceuticals. Fish Embryo Toxicity test was used to analyze the influence on developmental progression. Histological sections were stained with hematoxylin and eosin. Proliferating cells in liver were determined immunohistochemically by detection of Proliferating Cell Nuclear Antigens. The bioconcentration factor was measured by liquid chromatography coupled to mass spectrometry. Pharmaceuticals were used at low, medium and high concentrations in mixtures and at medium concentration as single compound. Exposure to the analyzed pharmaceuticals increased the rate of abnormal embryo and larvae development, accelerated the hatching time and affected the total hatching rate. Three-times lower proliferation of hepatocytes was observed in larvae exposed to paroxetine, mianserin, sertraline and the mixture of the pharmaceuticals at the highest concentrations. The highest bioaccumulation factor (BCF) was obtained for sertraline. The BCF of the analyzed compounds was higher if the organisms were exposed to the mixtures than to single pharmaceuticals. To conclude, the exposure of zebrafish larvae to selected antidepressants and their mixtures may cause disturbances in the organogenesis of fish even at environmental concentrations.
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Affiliation(s)
- Karolina Nowakowska
- Department of Bioanalysis and Drugs Analysis, Faculty of Pharmacy, Medical University of Warsaw, 1 Banacha Street, Warsaw PL-02097, Poland; Department of Environmental Health Sciences, Faculty of Pharmacy, Medical University of Warsaw, 1 Banacha Street, Warsaw PL-02097, Poland
| | - Joanna Giebułtowicz
- Department of Bioanalysis and Drugs Analysis, Faculty of Pharmacy, Medical University of Warsaw, 1 Banacha Street, Warsaw PL-02097, Poland.
| | - Maciej Kamaszewski
- Department of Ichthyology and Biotechnology in Aquaculture, Warsaw University of Life Sciences-SGGW, 8 Ciszewskiego Street, Warsaw PL-02-786, Poland
| | - Antoni Adamski
- Department of Ichthyology and Biotechnology in Aquaculture, Warsaw University of Life Sciences-SGGW, 8 Ciszewskiego Street, Warsaw PL-02-786, Poland; Institute of Biochemistry and Biophysics, Polish Academy of Science, 5a Pawinskiego Street, Warsaw PL-02106, Poland
| | - Hubert Szudrowicz
- Department of Ichthyology and Biotechnology in Aquaculture, Warsaw University of Life Sciences-SGGW, 8 Ciszewskiego Street, Warsaw PL-02-786, Poland
| | - Teresa Ostaszewska
- Department of Ichthyology and Biotechnology in Aquaculture, Warsaw University of Life Sciences-SGGW, 8 Ciszewskiego Street, Warsaw PL-02-786, Poland
| | - Urszula Solarska-Dzięciołowska
- Department of Bioanalysis and Drugs Analysis, Faculty of Pharmacy, Medical University of Warsaw, 1 Banacha Street, Warsaw PL-02097, Poland
| | - Grzegorz Nałęcz-Jawecki
- Department of Environmental Health Sciences, Faculty of Pharmacy, Medical University of Warsaw, 1 Banacha Street, Warsaw PL-02097, Poland
| | - Piotr Wroczyński
- Department of Bioanalysis and Drugs Analysis, Faculty of Pharmacy, Medical University of Warsaw, 1 Banacha Street, Warsaw PL-02097, Poland
| | - Agata Drobniewska
- Department of Environmental Health Sciences, Faculty of Pharmacy, Medical University of Warsaw, 1 Banacha Street, Warsaw PL-02097, Poland
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17
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Sousa B, Lopes J, Leal A, Martins M, Soares C, Valente IM, Rodrigues JA, Fidalgo F, Teixeira J. Response of Solanum lycopersicum L. to diclofenac - Impacts on the plant's antioxidant mechanisms. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 258:113762. [PMID: 31864077 DOI: 10.1016/j.envpol.2019.113762] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2019] [Revised: 11/27/2019] [Accepted: 12/07/2019] [Indexed: 06/10/2023]
Abstract
One emerging problem that recently has become a vastly acknowledged topic of concern is the environmental contamination by pharmaceuticals. Diclofenac (DCF) is one of the most common pharmaceuticals found, due to its high utilization and low removal rate in wastewater treatment processes. In this work, Solanum lycopersicum L. was used as a model to unravel how DCF contamination can affect crops, focusing on the internal mechanisms triggered by this exposure. For this purpose, plants were exposed to two different DCF concentrations (0.5 mg L-1 and 5 mg L-1). Results obtained here point towards a loss of shoot performance when plants were exposed to very high concentrations of DCF, but no delay or loss of yield in the flowering and fruit stages were ascribed to DCF contamination. Our data shows that a state of oxidative stress due to high reactive oxygen species accumulation was associated with this contamination, with very high DCF levels leading to a rise of lipid peroxidation, possibly accentuated by the inhibition of ROS-scavenging enzymes and unable to be counteracted by the visible upregulation of proline and the thiol-based redox network. Overall, these results allow to infer that in the current environmental context, no noticeable negative effects should be associated with the presence of DCF in soils where this crop is cultivated. However, the oxidative stress and lower biomass associated with the highest concentration are alarming, since DCF levels in the environment are continuously increasing and further measures are necessary to assess this problematic.
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Affiliation(s)
- Bruno Sousa
- GreenUPorto - Sustainable Agrifood Production Research Centre, Departamento de Biologia, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre 687, 4169-007, Porto, Portugal.
| | - Jorge Lopes
- GreenUPorto - Sustainable Agrifood Production Research Centre, Departamento de Biologia, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre 687, 4169-007, Porto, Portugal
| | - André Leal
- GreenUPorto - Sustainable Agrifood Production Research Centre, Departamento de Biologia, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre 687, 4169-007, Porto, Portugal
| | - Maria Martins
- GreenUPorto - Sustainable Agrifood Production Research Centre, Departamento de Biologia, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre 687, 4169-007, Porto, Portugal
| | - Cristiano Soares
- GreenUPorto - Sustainable Agrifood Production Research Centre, Departamento de Biologia, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre 687, 4169-007, Porto, Portugal
| | - Inês M Valente
- REQUIMTE, LAQV, ICBAS, Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313, Porto, Portugal; REQUIMTE, LAQV, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre 687, 4169-007, Porto, Portugal
| | - José A Rodrigues
- REQUIMTE, LAQV, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre 687, 4169-007, Porto, Portugal
| | - Fernanda Fidalgo
- GreenUPorto - Sustainable Agrifood Production Research Centre, Departamento de Biologia, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre 687, 4169-007, Porto, Portugal
| | - Jorge Teixeira
- GreenUPorto - Sustainable Agrifood Production Research Centre, Departamento de Biologia, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre 687, 4169-007, Porto, Portugal
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18
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Miarov O, Tal A, Avisar D. A critical evaluation of comparative regulatory strategies for monitoring pharmaceuticals in recycled wastewater. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 254:109794. [PMID: 31780268 DOI: 10.1016/j.jenvman.2019.109794] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 09/23/2019] [Accepted: 10/27/2019] [Indexed: 06/10/2023]
Abstract
Pharmaceuticals are a subset of micropollutants, present in the environment in trace concentrations. Because of their persistent nature, these chemicals are of particular concern. Little is known about how mixtures of pharmaceutical residues, found in WWTP effluents, affect the environment or public health. Yet, numerous studies show negative outcomes for both aquatic and terrestrial organisms, suggesting that they are given both to bioaccumulation and uptake in plants. Israel leads the world in effluent reuse (86%), almost exclusively utilized for purposes of agricultural irrigation. Pharmaceuticals, however, are not included in Israel's water regulatory oversight or management, essentially creating an epidemiological experiment among its citizens and environment. Globally, these compounds also are not commonly subject to monitoring or regulation. This study reviews and analyzes water policies and regulation worldwide that address the presence of pharmaceuticals in water resources, with a particular focus on Australia, Singapore, Switzerland, and the USA. Furthermore, the study investigates the reasons why these chemicals are not yet regulated in Israel. Based on a comprehensive evaluation of the data and analysis of the regulatory rationale in other countries, a list of recommended pharmaceutical standards that should be measured and monitored in Israel's wastewater treatment system is proposed. The suggested prioritization criteria should be at the heart of a new regulatory agenda for controlling pharmaceutical contamination in wastewater.
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Affiliation(s)
- Olga Miarov
- The Water Research Center, Porter School of the Environment and Earth Sciences, Faculty of Exact Sciences, Tel Aviv University, Israel
| | - Alon Tal
- Department of Public Policy, Faculty of Social Sciences, Tel Aviv University, Israel
| | - Dror Avisar
- The Water Research Center, Porter School of the Environment and Earth Sciences, Faculty of Exact Sciences, Tel Aviv University, Israel.
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19
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Świacka K, Maculewicz J, Smolarz K, Szaniawska A, Caban M. Mytilidae as model organisms in the marine ecotoxicology of pharmaceuticals - A review. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 254:113082. [PMID: 31472454 DOI: 10.1016/j.envpol.2019.113082] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 08/17/2019] [Accepted: 08/19/2019] [Indexed: 06/10/2023]
Abstract
Growing production and consumption of pharmaceuticals is a global problem. Due to insufficient data on the concentration and distribution of pharmaceuticals in the marine environment, there are no appropriate legal regulations concerning their emission. In order to understand all aspects of the fate of pharmaceuticals in the marine environment and their effect on marine biota, it is necessary to find the most appropriate model organism for this purpose. This paper presents an overview of the ecotoxicological studies of pharmaceuticals, regarding the assessment of Mytilidae as suitable organisms for biomonitoring programs and toxicity tests. The use of mussels in the monitoring of pharmaceuticals allows the observation of changes in the concentration and distribution of these compounds. This in turn gives valuable information on the amount of pharmaceutical pollutants released into the environment in different areas. In this context, information necessary for the assessment of risks related to pharmaceuticals in the marine environment are provided based on what effective management procedures can be developed. However, the accumulation capacity of individual Mytilidae species, the bioavailability of pharmaceuticals and their biological effects should be further scrutinized.
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Affiliation(s)
- Klaudia Świacka
- Department of Experimental Ecology of Marine Organisms, Institute of Oceanography, University of Gdansk, Av. Pilsudskiego 46, 81-378 Gdynia, Poland.
| | - Jakub Maculewicz
- Department of Environmental Analysis, Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Katarzyna Smolarz
- Department of Marine Ecosystems Functioning, Institute of Oceanography, University of Gdansk, Av. Pilsudskiego 46, 81-378 Gdynia, Poland
| | - Anna Szaniawska
- Department of Experimental Ecology of Marine Organisms, Institute of Oceanography, University of Gdansk, Av. Pilsudskiego 46, 81-378 Gdynia, Poland
| | - Magda Caban
- Department of Environmental Analysis, Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland
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20
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Gaw S, Harford A, Pettigrove V, Sevicke‐Jones G, Manning T, Ataria J, Cresswell T, Dafforn KA, Leusch FDL, Moggridge B, Cameron M, Chapman J, Coates G, Colville A, Death C, Hageman K, Hassell K, Hoak M, Gadd J, Jolley DF, Karami A, Kotzakoulakis K, Lim R, McRae N, Metzeling L, Mooney T, Myers J, Pearson A, Saaristo M, Sharley D, Stuthe J, Sutherland O, Thomas O, Tremblay L, Wood W, Boxall ABA, Rudd MA, Brooks BW. Towards Sustainable Environmental Quality: Priority Research Questions for the Australasian Region of Oceania. INTEGRATED ENVIRONMENTAL ASSESSMENT AND MANAGEMENT 2019; 15:917-935. [PMID: 31273905 PMCID: PMC6899907 DOI: 10.1002/ieam.4180] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Revised: 04/26/2019] [Accepted: 06/24/2019] [Indexed: 05/06/2023]
Abstract
Environmental challenges persist across the world, including the Australasian region of Oceania, where biodiversity hotspots and unique ecosystems such as the Great Barrier Reef are common. These systems are routinely affected by multiple stressors from anthropogenic activities, and increasingly influenced by global megatrends (e.g., the food-energy-water nexus, demographic transitions to cities) and climate change. Here we report priority research questions from the Global Horizon Scanning Project, which aimed to identify, prioritize, and advance environmental quality research needs from an Australasian perspective, within a global context. We employed a transparent and inclusive process of soliciting key questions from Australasian members of the Society of Environmental Toxicology and Chemistry. Following submission of 78 questions, 20 priority research questions were identified during an expert workshop in Nelson, New Zealand. These research questions covered a range of issues of global relevance, including research needed to more closely integrate ecotoxicology and ecology for the protection of ecosystems, increase flexibility for prioritizing chemical substances currently in commerce, understand the impacts of complex mixtures and multiple stressors, and define environmental quality and ecosystem integrity of temporary waters. Some questions have specific relevance to Australasia, particularly the uncertainties associated with using toxicity data from exotic species to protect unique indigenous species. Several related priority questions deal with the theme of how widely international ecotoxicological data and databases can be applied to regional ecosystems. Other timely questions, which focus on improving predictive chemistry and toxicology tools and techniques, will be important to answer several of the priority questions identified here. Another important question raised was how to protect local cultural and social values and maintain indigenous engagement during problem formulation and identification of ecosystem protection goals. Addressing these questions will be challenging, but doing so promises to advance environmental sustainability in Oceania and globally.
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Affiliation(s)
- Sally Gaw
- School of Physical and Chemical SciencesUniversity of CanterburyChristchurchNew Zealand
| | - Andrew Harford
- Department of the Environment and EnergyAustralian Government, DarwinAustralia
| | - Vincent Pettigrove
- Aquatic Environmental Stress Research CentreRMIT University, BundooraVictoriaAustralia
| | | | | | | | - Tom Cresswell
- Australia's Nuclear Science and Technology OrganisationLucas HeightsAustralia
| | | | - Frederic DL Leusch
- Australian Rivers Institute and School of Environment and ScienceGriffith UniversityBrisbaneAustralia
| | - Bradley Moggridge
- Institute for Applied EcologyUniversity of CanberraCanberraAustralia
| | | | - John Chapman
- Office of Environment and HeritageNew South WalesAustralia
| | - Gary Coates
- Te Rūnanga o Ngāi TahuChristchurchNew Zealand
| | - Anne Colville
- School of Life SciencesUniversity of Technology SydneySydneyAustralia
| | - Claire Death
- Faculty of Veterinary ScienceUniversity of MelbourneVictoriaAustralia
| | - Kimberly Hageman
- Department of Chemistry and BiochemistryUtah State University, LoganUtahUSA
| | - Kathryn Hassell
- Aquatic Environmental Stress Research CentreRMIT University, BundooraVictoriaAustralia
| | - Molly Hoak
- School of BiosciencesThe University of Melbourne, ParkvilleVictoriaAustralia
| | - Jennifer Gadd
- National Institute of Atmospheric and Water ResearchAucklandNew Zealand
| | - Dianne F Jolley
- Faculty of Science, University of Technology SydneySydneyAustralia
| | - Ali Karami
- Environmental Futures Research InstituteGriffith UniversityBrisbaneAustralia
| | | | - Richard Lim
- Faculty of Science, University of Technology SydneySydneyAustralia
| | - Nicole McRae
- School of Physical and Chemical SciencesUniversity of CanterburyChristchurchNew Zealand
| | | | - Thomas Mooney
- Department of the Environment and EnergyAustralian Government, DarwinAustralia
| | - Jackie Myers
- Aquatic Environmental Stress Research CentreRMIT University, BundooraVictoriaAustralia
| | | | - Minna Saaristo
- School of Biological SciencesMonash UniversityMelbourneAustralia
| | - Dave Sharley
- Bio2Lab, Melbourne Innovation CentreGreensboroughAustralia
| | | | | | - Oliver Thomas
- School of Applied Chemistry and Environmental ScienceRMIT University, MelbourneVictoriaAustralia
| | - Louis Tremblay
- Cawthron InstituteNelsonNew Zealand
- School of Biological SciencesUniversity of AucklandAucklandNew Zealand
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21
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Bittner L, Klüver N, Henneberger L, Mühlenbrink M, Zarfl C, Escher BI. Combined Ion-Trapping and Mass Balance Models To Describe the pH-Dependent Uptake and Toxicity of Acidic and Basic Pharmaceuticals in Zebrafish Embryos ( Danio rerio). ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:7877-7886. [PMID: 31177773 DOI: 10.1021/acs.est.9b02563] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
The aim of the current study was to understand and develop models to predict the pH-dependent toxicity of ionizable pharmaceuticals in embryos of the zebrafish Danio rerio. We found a higher uptake and toxicity with increasing neutral fraction of acids (diclofenac, genistein, naproxen, torasemide, and warfarin) and bases (metoprolol and propranolol). Simple mass balance models accounting for the partitioning to lipids and proteins in the zebrafish embryo were found to be suitable to predict the bioconcentration after 96 h of exposure if pH values did not differ much from the internal pH of 7.55. For other pH values, a kinetic ion-trap model for the zebrafish embryo explained the pH dependence of biouptake and toxicity. The total internal lethal concentrations killing 50% of the zebrafish embryos (ILC50) were calculated from the measured BCF and LC50. The resulting ILC50 were independent of external pH. Critical membrane concentrations were deduced by an internal mass balance model, and apart from diclofenac, whose specific toxicity in fish had already been established, all pharmaceuticals were confirmed to act as baseline toxicants in zebrafish.
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Affiliation(s)
- Lisa Bittner
- Helmholtz Centre for Environmental Research - UFZ , Permoserstrasse 15 , 04318 Leipzig , Germany
| | - Nils Klüver
- Helmholtz Centre for Environmental Research - UFZ , Permoserstrasse 15 , 04318 Leipzig , Germany
| | - Luise Henneberger
- Helmholtz Centre for Environmental Research - UFZ , Permoserstrasse 15 , 04318 Leipzig , Germany
| | - Marie Mühlenbrink
- Helmholtz Centre for Environmental Research - UFZ , Permoserstrasse 15 , 04318 Leipzig , Germany
| | - Christiane Zarfl
- Eberhard Karls University of Tübingen , Center for Applied Geoscience , Hölderlinstrasse 12 , 72074 Tübingen , Germany
| | - Beate I Escher
- Helmholtz Centre for Environmental Research - UFZ , Permoserstrasse 15 , 04318 Leipzig , Germany
- Eberhard Karls University of Tübingen , Center for Applied Geoscience , Hölderlinstrasse 12 , 72074 Tübingen , Germany
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22
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Gomes TB, Fernandes Sales Junior S, Saint'Pierre TD, Correia FV, Hauser-Davis RA, Saggioro EM. Sublethal psychotropic pharmaceutical effects on the model organism Danio rerio: Oxidative stress and metal dishomeostasis. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 171:781-789. [PMID: 30660971 DOI: 10.1016/j.ecoenv.2019.01.041] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Revised: 01/07/2019] [Accepted: 01/10/2019] [Indexed: 06/09/2023]
Abstract
Contaminants of emerging concern have become an important environmental problem, especially pharmaceutically active compounds (PhACs), since, after use, these drugs return to the environment, contaminating aquatic ecosystems. Some may display the ability to bioaccumulate and biomagnify throughout the food chain, leading to potential environmental and human deleterious effects which are, however, still largely unknown. In this context, the aim of the present study was to evaluate the effect of two psychotropic drugs commonly found in the environment, carbamazepine (CBZ) and clonazepam (CZP), both isolated and co-administrated, on oxidative stress biomarkers and essential metal homeostasis in Danio rerio fish specimens. No studies are available to data in this regard concerning CZP effects on fish. Reduced Glutathione (GSH), Metallothionein (MT), Catalase (CAT) and Glutathione S-Transferase (GST) were determined, as well as essential metals in fish liver, kidney and brains. Significant oxidative stress effects were observed for several biomarkers, where brain GST activity was the most affected, mainly with regard to CBZ exposure, while GST and CAT activity in the liver were downregulated in the co-administration mixture. In addition, dishomeostasis of several essential elements was detected in all analyzed organs, with a synergistic action of CBZ and CZP in brain, decreasing basal Mg, Al, K, Fe, Co, Ni and Cu levels in this organ, the target site for these drugs in humans. The brain organ was the most affected as observed by altered GST activity and metal dyshomeostasis concerning exposure to both compounds. These compounds, thus, present health risks to the aquatic biota, due to the evidenced deleterious effects and their constant release into the environment due to widespread use. Steps are needed to implement adequate legislation for risk analysis and decision-making in order to mitigate the effects of these emerging contaminants on aquatic ecosystem health.
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Affiliation(s)
- Thais Braga Gomes
- Fiocruz, Centro de Estudos em Saúde do Trabalhador e Ecologia Humana (CESTEH), Escola Nacional de Saúde Pública (ENSP), Av. Brasil, 4.365, Manguinhos, 21040-360 Rio de Janeiro, RJ, Brazil
| | - Sidney Fernandes Sales Junior
- Fiocruz, Centro de Estudos em Saúde do Trabalhador e Ecologia Humana (CESTEH), Escola Nacional de Saúde Pública (ENSP), Av. Brasil, 4.365, Manguinhos, 21040-360 Rio de Janeiro, RJ, Brazil
| | | | - Fábio Veríssimo Correia
- UNIRIO, Departamento de Ciências Naturais, Av. Pasteur, 458, Urca, 22290-20 Rio de Janeiro, Brazil
| | - Rachel Ann Hauser-Davis
- Fiocruz, Centro de Estudos em Saúde do Trabalhador e Ecologia Humana (CESTEH), Escola Nacional de Saúde Pública (ENSP), Av. Brasil, 4.365, Manguinhos, 21040-360 Rio de Janeiro, RJ, Brazil
| | - Enrico Mendes Saggioro
- Fiocruz, Departamento de Saneamento e Saúde Ambiental, Escola Nacional de Saúde Pública (ENSP), Av. Brasil, 4.365, Manguinhos, 21040-360 Rio de Janeiro, RJ, Brazil.
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23
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McRae NK, Gaw S, Brooks BW, Glover CN. Oxidative stress in the galaxiid fish, Galaxias maculatus, exposed to binary waterborne mixtures of the pro-oxidant cadmium and the anti-oxidant diclofenac. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 247:638-646. [PMID: 30711819 DOI: 10.1016/j.envpol.2019.01.073] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Revised: 01/01/2019] [Accepted: 01/20/2019] [Indexed: 06/09/2023]
Abstract
Chemical mixtures represent environmentally-realistic exposures of contaminants to aquatic biota. However, there remains a limited understanding of how toxicant mixtures may impact biological function, relative to their individual components. In the current study, oxidative stress responses of the freshwater galaxiid fish inanga (Galaxias maculatus) were examined following exposure to the pro-oxidant trace metal cadmium (2 or 9 μg L-1), and the anti-oxidant pharmaceutical drug diclofenac (770 μg L-1), individually or in simple binary mixtures. Cadmium exposure in the absence of diclofenac significantly decreased renal catalase activity, increased hepatic catalase activity, decreased renal superoxide dismutase (SOD) and decreased glutathione-S-transferase activity, effects that are suggestive of anti-oxidant defense inhibition and/or generation of increased reactive oxygen species. Diclofenac exposure in the absence of cadmium resulted in a decreased renal lipid peroxidation, consistent with its known anti-oxidant properties. The presence of waterborne diclofenac altered the effects of cadmium on catalase activity in the liver, SOD activity in the gill, and lipid peroxidation in the liver. Co-exposure with cadmium modulated diclofenac effects on lipid peroxidation in the kidney. These data indicate the capacity of each of these toxicants to offset biological effects of the other when both co-occur in urban waters at specific concentrations. This study also demonstrates the complexity of outcomes in contaminant mixtures, even when these stressors are presented as simple binary combinations.
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Affiliation(s)
- Nicole K McRae
- School of Biological Sciences, University of Canterbury, Christchurch, New Zealand.
| | - Sally Gaw
- School of Physical and Chemical Sciences, University of Canterbury, Christchurch, New Zealand
| | - Bryan W Brooks
- Department of Environmental Sciences, Baylor University, Waco, TX, USA
| | - Chris N Glover
- Faculty of Science and Technology and Athabasca River Basin Research Institute, Athabasca University, Athabasca, Alberta, Canada; Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada
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