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Evaluation of the Adsorption Efficacy of Bentonite on Aflatoxin M 1 Levels in Contaminated Milk. Toxins (Basel) 2023; 15:toxins15020107. [PMID: 36828421 PMCID: PMC9966358 DOI: 10.3390/toxins15020107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Revised: 01/20/2023] [Accepted: 01/24/2023] [Indexed: 01/27/2023] Open
Abstract
The existence of aflatoxin M1 (AFM1) in raw milk results in economic losses and public health risks. This research aims to examine the capability of bentonite to adsorb and/or eliminate AFM1 from various raw milk types. In addition, the effects of numerous bentonites (HAFR 1, 2, 3 and 4) on the nutritional characteristics of the milk were studied. Our findings revealed that goat milk had the highest value of AFM1 (490.30 ng/L) in comparison to other milks. AFM1 adsorption was influenced by applying bentonite (0.5 and 1 g) in a concentration-dependent manner for different time intervals (from 0 to 12 h). The percentage of AFM1 reached the maximum adsorption level after 12 h to 100, 98.5 and 98% for bentonites HAFR 3, 1 and 2, respectively. HAFR 3 (1 g bentonite) presented higher adsorption efficiency than other bentonites used in the phosphate buffer saline (PBS) and milk. Residual levels of AFM1 reached their lowest values of 0 and 1.5 ng/L while using HAFR 3 in PBS and milk, respectively. With regard to the influence of bentonite on the nutritional characteristics of milk, there was an increase in fat, protein and solid non-fat ratio while using HAFR 3 and 4, yet decreased lactose in comparison with the control. Scanning Electron Microscopy and Fourier Transform-Infrared Spectroscopy both identified bentonites as superior AFM1 binders. The results demonstrated that bentonite, particularly HAFR 3, was the most effective adsorbent and could thus be a promising candidate for the decontamination of AFM1 in milk.
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Hamad G, El-Makarem H, Elaziz AA, Amer A, El-Nogoumy B, Abou-Alella S. Adsorption efficiency of sodium & calcium bentonite for ochratoxin A in some Egyptian cheeses: an innovative fortification model, in vitro and in vivo experiments. WORLD MYCOTOXIN J 2022. [DOI: 10.3920/wmj2021.2682] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The incidence of the mycotoxin ochratoxin A (OTA) in cheeses constitutes a significant economic and health concern for producers and consumers alike. Recently, detoxification approaches using food additives to counteract mycotoxins have been widely recommended in the food industry. This study aimed to quantify OTA levels in some Egyptian cheese types, and experimentally determine the detoxification effect of bentonite both in vitro and in vivo. The examined Roomy and Karish cheese showed higher OTA levels (4.138 and 3.399 μg/kg, respectively) than other cheeses. Calcium bentonite presented higher adsorption efficiency than sodium bentonite at all concentrations, both in phosphate buffered saline (PBS) and feta cheese, and at the whole pH range. Calcium bentonite concentrations (60 and 100 mg/ml) had much higher sequestering activity on OTA both in PBS and feta cheese, while the adsorption efficiency was higher at pH 6.8 than at pH 3. All enzymatic activities were near the control levels in rats treated both with OTA and bentonite compared with rats treated with OTA alone. The IC50 of calcium bentonite was 107.75 μg/ml, which was less cytotoxic than sodium bentonite (52.96 μg/ml). Bentonites were categorised by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) as excellent binders of OTA. The innovative calcium bentonite-fortified feta cheese showed the most superior sensorial properties; hence it can be predicted as a novel food-grade adsorbent for OTA sequestration.
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Affiliation(s)
- G.M. Hamad
- Department of Food Technology, Arid Land Cultivation Research Institute, City of Scientific Research and Technological Applications, New Borg El-Arab City, Alexandria 21934, Egypt
| | - H.A. El-Makarem
- Department of Food Hygiene and Control, Faculty of Veterinary Medicine, Alexandria University, Alexandria, Egypt
| | - A.I. Abd Elaziz
- Department of Pharmacology, Faculty of Medicine, Al-Azhar University, Cairo, Egypt
| | - A.A. Amer
- Department of Food Hygiene and Control, Faculty of Veterinary Medicine, Alexandria University, Alexandria, Egypt
| | - B.A. El-Nogoumy
- Department of Botany and Microbiology, Faculty of Science, Kafrelsheikh University, Kafrelsheikh, Egypt
| | - S.A. Abou-Alella
- Department of Food Hygiene and Control, Faculty of Veterinary Medicine, Alexandria University, Alexandria, Egypt
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Yong MMH, Leistenschneider C, Miranda JA, Paler MK, Legaspi C, Germanov E, Araujo G, Burkhardt-Holm P, Erni-Cassola G. Microplastics in fecal samples of whale sharks ( Rhincodon typus) and from surface water in the Philippines. MICROPLASTICS AND NANOPLASTICS 2021; 1:17. [PMID: 34939039 PMCID: PMC8475362 DOI: 10.1186/s43591-021-00017-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Accepted: 09/13/2021] [Indexed: 05/27/2023]
Abstract
Marine plastic abundance has increased over the past 60 years and microplastics (< 5 mm) constitute a primary component of such litter. Filter-feeding megafauna, such as the whale shark, might be particularly affected by microplastic pollution as their feeding mode requires filtration of up to thousands of cubic meters of water. In addition, the habitat range of whale sharks intersects with several recognized microplastic pollution hotspots, among which is the Coral Triangle. Direct evidence for microplastic ingestion in whale sharks however, has not yet been presented. Here we show that whale shark scat collected in the Philippines from 2012 to 2019 contained a mean of 2.8 microplastics g- 1. Contrary to our expectations, the microplastic concentration in the scat remained consistent from 2012 to 2019. Water samples from the study site in 2019 indicated that the local microplastic pollution (5.83 particles m- 3) was higher than in surface waters in other whale shark habitats, but well below other pollution hot-spots found in Southeast Asia and China (range: 100-4100 particles m- 3). With the predicted growth in plastic use, leading to increased plastic marine pollution, whale sharks are expected to become more exposed to this form of pollution. To what extent microplastic ingestion impacts the overall health status of this endangered species remains an open question. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1186/s43591-021-00017-9.
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Affiliation(s)
- Mila Mi Hua Yong
- Man-Society-Environment (Programme MGU), Department of Environmental Sciences), University of Basel, Vesalgasse 1, CH-4051 Basel, Switzerland
| | - Clara Leistenschneider
- Man-Society-Environment (Programme MGU), Department of Environmental Sciences), University of Basel, Vesalgasse 1, CH-4051 Basel, Switzerland
| | - Joni Anne Miranda
- Large Marine Vertebrates Research Institute Philippines, 6308 Jagna, Bohol Philippines
| | - Maria Kristina Paler
- Department of Biology, University of San Carlos, Talamban, Cebu City, Philippines
| | - Christine Legaspi
- Large Marine Vertebrates Research Institute Philippines, 6308 Jagna, Bohol Philippines
| | - Elitza Germanov
- Marine Megafauna Foundation, 11260 Donner Pass Road, Unit 256, Truckee, CA 96161 USA
| | - Gonzalo Araujo
- Large Marine Vertebrates Research Institute Philippines, 6308 Jagna, Bohol Philippines
- Marine Research and Conservation Foundation, Somerset, TA4 3SJ UK
| | - Patricia Burkhardt-Holm
- Man-Society-Environment (Programme MGU), Department of Environmental Sciences), University of Basel, Vesalgasse 1, CH-4051 Basel, Switzerland
| | - Gabriel Erni-Cassola
- Man-Society-Environment (Programme MGU), Department of Environmental Sciences), University of Basel, Vesalgasse 1, CH-4051 Basel, Switzerland
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Kooi M, Primpke S, Mintenig SM, Lorenz C, Gerdts G, Koelmans AA. Characterizing the multidimensionality of microplastics across environmental compartments. WATER RESEARCH 2021; 202:117429. [PMID: 34304075 DOI: 10.1016/j.watres.2021.117429] [Citation(s) in RCA: 56] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Revised: 07/02/2021] [Accepted: 07/08/2021] [Indexed: 05/23/2023]
Abstract
Understanding the multidimensionality of microplastics is essential for a realistic assessment of the risks these particles pose to the environment and human health. Here, we capture size, shape, area, polymer, volume and mass characteristics of >60,000 individual microplastic particles as continuous distributions. Particles originate from samples taken from different aquatic compartments, including surface water and sediments from the marine and freshwater environment, waste water effluents, and freshwater organisms. Data were obtained using state-of-the-art FTIR-imaging, using the same automated imaging post-processing software. We introduce a workflow with two quality criteria that assure minimum data quality loss due to volumetric and filter area subsampling. We find that probability density functions (PDFs) for particle length follow power law distributions, with median slopes ranging from 2.2 for marine surface water to 3.1 for biota samples, and that these slopes were compartment-specific. Polymer-specific PDFs for particle length demonstrated significant differences in slopes among polymers, hinting at polymer specific sources, removal or fragmentation processes. Furthermore, we provide PDFs for particle width, width to length ratio, area, specific surface area, volume and mass distributions and propose how these can represent the full diversity of toxicologically relevant dose metrics required for the assessment of microplastic risks.
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Affiliation(s)
- Merel Kooi
- Aquatic Ecology and Water Quality Management Group, Wageningen University & Research, The Netherlands.
| | - Sebastian Primpke
- Shelf Seas Systems Ecology, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Germany
| | - Svenja M Mintenig
- Aquatic Ecology and Water Quality Management Group, Wageningen University & Research, The Netherlands
| | - Claudia Lorenz
- Department of The Built Environment, Aalborg University, Thomas Manns Vej 23, 9220 Aalborg Øst, Denmark
| | - Gunnar Gerdts
- Shelf Seas Systems Ecology, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Germany
| | - Albert A Koelmans
- Aquatic Ecology and Water Quality Management Group, Wageningen University & Research, The Netherlands
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Khochaiche A, Westlake M, O'Keefe A, Engels E, Vogel S, Valceski M, Li N, Rule KC, Horvat J, Konstantinov K, Rosenfeld A, Lerch M, Corde S, Tehei M. First extensive study of silver-doped lanthanum manganite nanoparticles for inducing selective chemotherapy and radio-toxicity enhancement. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 123:111970. [PMID: 33812598 DOI: 10.1016/j.msec.2021.111970] [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: 10/30/2020] [Revised: 02/05/2021] [Accepted: 02/08/2021] [Indexed: 01/22/2023]
Abstract
Nanoparticles have a great potential to increase the therapeutic efficiency of several cancer therapies. This research examines the potential for silver-doped lanthanum manganite nanoparticles to enhance radiation therapy to target radioresistant brain cancer cells, and their potential in combinational therapy with magnetic hyperthermia. Magnetic and structural characterisation found all dopings of nanoparticles (NPs) to be pure and single phase with an average crystallite size of approximately 15 nm for undoped NPs and 20 nm for silver doped NPs. Additionally, neutron diffraction reveals that La0.9Ag0.1MnO3 (10%-LAGMO) NPs exhibit residual ferromagnetism at 300 K that is not present in lower doped NPs studied in this work, indicating that the Curie temperature may be manipulated according to silver doping. This radiobiological study reveals a completely cancer-cell selective treatment for LaMnO3, La0.975Ag0.025MnO3 and La0.95Ag0.05MnO3 (0, 2.5 and 5%-LAGMO) and also uncovers a potent combination of undoped lanthanum manganite with orthovoltage radiation. Cell viability assays and real time imaging results indicated that a concentration of 50 μg/mL of the aforementioned nanoparticles do not affect the growth of Madin-Darby Canine Kidney (MDCK) non-cancerous cells over time, but stimulate its metabolism for overgrowth, while being highly toxic to 9L gliosarcoma (9LGS). This is not the case for 10%-LAGMO nanoparticles, which were toxic to both non-cancerous and cancer cell lines. The nanoparticles also exhibited a level of toxicity that was regulated by the overproduction of free radicals, such as reactive oxygen species, amplified when silver ions are involved. With the aid of fluorescent imaging, the drastic effects of these reactive oxygen species were visualised, where nucleus cleavage (an apoptotic indicator) was identified as a major consequence. The genotoxic response of this effect for 9LGS and MDCK due to 10%-LAGMO NPs indicates that it is also causing DNA double strand breaks within the cell nucleus. Using 125 kVp orthovoltage radiation, in combination with an appropriate amount of NP-induced cell death, identified undoped lanthanum manganite as the most ideal treatment. Real-time imaging following the combination treatment of undoped lanthanum manganite nanoparticles and radiation, highlighted a hinderance of growth for 9LGS, while MDCK growth was boosted. The clonogenic assay following incubation with undoped lanthanum manganite nanoparticles combined with a relatively low dose of radiation (2 Gy) decreased the surviving fraction to an exceptionally low (0.6 ± 6.7)%. To our knowledge, these results present the first biological in-depth analysis on silver-doped lanthanum manganite as a brain cancer selective chemotherapeutic and radiation dose enhancer and as a result will propel its first in vivo investigation.
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Affiliation(s)
- Abass Khochaiche
- Centre for Medical Radiation Physics, University of Wollongong, Wollongong, Australia; School of Physics, University of Wollongong, Wollongong, Australia; Illawarra Health and Medical Research Institute (IHMRI), University of Wollongong, Wollongong, Australia; Molecular Horizons, School of Chemistry and Molecular, Bioscience University of Wollongong, Wollongong, Australia
| | - Matt Westlake
- Centre for Medical Radiation Physics, University of Wollongong, Wollongong, Australia; School of Physics, University of Wollongong, Wollongong, Australia; Illawarra Health and Medical Research Institute (IHMRI), University of Wollongong, Wollongong, Australia; Molecular Horizons, School of Chemistry and Molecular, Bioscience University of Wollongong, Wollongong, Australia
| | - Alice O'Keefe
- Centre for Medical Radiation Physics, University of Wollongong, Wollongong, Australia; School of Physics, University of Wollongong, Wollongong, Australia; Illawarra Health and Medical Research Institute (IHMRI), University of Wollongong, Wollongong, Australia; Molecular Horizons, School of Chemistry and Molecular, Bioscience University of Wollongong, Wollongong, Australia
| | - Elette Engels
- Centre for Medical Radiation Physics, University of Wollongong, Wollongong, Australia; School of Physics, University of Wollongong, Wollongong, Australia; Illawarra Health and Medical Research Institute (IHMRI), University of Wollongong, Wollongong, Australia; Molecular Horizons, School of Chemistry and Molecular, Bioscience University of Wollongong, Wollongong, Australia
| | - Sarah Vogel
- Centre for Medical Radiation Physics, University of Wollongong, Wollongong, Australia; School of Physics, University of Wollongong, Wollongong, Australia; Illawarra Health and Medical Research Institute (IHMRI), University of Wollongong, Wollongong, Australia; Molecular Horizons, School of Chemistry and Molecular, Bioscience University of Wollongong, Wollongong, Australia
| | - Michael Valceski
- Centre for Medical Radiation Physics, University of Wollongong, Wollongong, Australia; School of Physics, University of Wollongong, Wollongong, Australia; Illawarra Health and Medical Research Institute (IHMRI), University of Wollongong, Wollongong, Australia; Molecular Horizons, School of Chemistry and Molecular, Bioscience University of Wollongong, Wollongong, Australia
| | - Nan Li
- Centre for Medical Radiation Physics, University of Wollongong, Wollongong, Australia; School of Physics, University of Wollongong, Wollongong, Australia; Illawarra Health and Medical Research Institute (IHMRI), University of Wollongong, Wollongong, Australia
| | - Kirrily C Rule
- Australian Nuclear Science and Technology Organisation, ANSTO, Sydney, Australia
| | - Josip Horvat
- School of Physics, University of Wollongong, Wollongong, Australia
| | - Konstantin Konstantinov
- Illawarra Health and Medical Research Institute (IHMRI), University of Wollongong, Wollongong, Australia; Institute for Superconducting and Electronic Materials (ISEM), University of Wollongong, Wollongong, Australia
| | - Anatoly Rosenfeld
- Centre for Medical Radiation Physics, University of Wollongong, Wollongong, Australia; School of Physics, University of Wollongong, Wollongong, Australia; Illawarra Health and Medical Research Institute (IHMRI), University of Wollongong, Wollongong, Australia
| | - Michael Lerch
- Centre for Medical Radiation Physics, University of Wollongong, Wollongong, Australia; School of Physics, University of Wollongong, Wollongong, Australia; Illawarra Health and Medical Research Institute (IHMRI), University of Wollongong, Wollongong, Australia; Molecular Horizons, School of Chemistry and Molecular, Bioscience University of Wollongong, Wollongong, Australia
| | - Stéphanie Corde
- Centre for Medical Radiation Physics, University of Wollongong, Wollongong, Australia; School of Physics, University of Wollongong, Wollongong, Australia; Illawarra Health and Medical Research Institute (IHMRI), University of Wollongong, Wollongong, Australia; Department of Radiation Oncology, Prince of Wales Hospital, Randwick, Australia
| | - Moeava Tehei
- Centre for Medical Radiation Physics, University of Wollongong, Wollongong, Australia; School of Physics, University of Wollongong, Wollongong, Australia; Illawarra Health and Medical Research Institute (IHMRI), University of Wollongong, Wollongong, Australia; Molecular Horizons, School of Chemistry and Molecular, Bioscience University of Wollongong, Wollongong, Australia.
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Trannum HC, Næss R, Gundersen H. Macrofaunal colonization of mine tailings impacted sediments. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 708:134866. [PMID: 31785908 DOI: 10.1016/j.scitotenv.2019.134866] [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: 07/11/2019] [Revised: 10/01/2019] [Accepted: 10/05/2019] [Indexed: 06/10/2023]
Abstract
An experiment was conducted to study and compare macrofaunal colonization of thin layers of mine tailings. Experimental boxes filled with marine sediments capped with mine tailings were placed on the seabed and subject to colonization for six and twelve months. Three Norwegian mine tailings, representative of major production processes, were used. In addition, one set of boxes served as control and was not treated with tailings. The layer thickness of the tailings was supposed to represent the thickness in the transition zone between the sea deposit itself and unaffected sediments. The most fine-grained tailings, which also contained flotation chemicals, showed a significantly lower colonization than the control and the other treatments. At the same time, all sediments were successfully colonized and rich in species. In general, the abundance of annelids was lower, while the abundance of mollusks was higher in the tailings-treatments than the controls. There were larger differences in faunal densities between the controls and tailings-treatments after six than twelve months, probably due to coverage by natural sedimentation and mixing of the thin tailings layer with the sediment underneath throughout the experiment. As the tailings initiated varying degree of effects on the benthos, there is expected to be a difference in how far the effects will extend outside the sea deposit. This is the first study where the colonization potential is systematically compared between various tailings, and as colonization is assumed a frequent and important mechanism for faunal restitution after disturbance events, the results are important for the management of tailings placements as well as with regard to other forms of disturbances associated with defaunated areas, like dredging and disposal of contaminated sediments.
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Affiliation(s)
- Hilde C Trannum
- Norwegian Institute for Water Research, Gaustadalléen 21, NO-0349 Oslo, Norway; University of Agder, Center for Coastal Research, NO-4604 Kristiansand, Norway.
| | - Rita Næss
- Norwegian Institute for Water Research, Gaustadalléen 21, NO-0349 Oslo, Norway
| | - Hege Gundersen
- Norwegian Institute for Water Research, Gaustadalléen 21, NO-0349 Oslo, Norway
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Elliott CT, Connolly L, Kolawole O. Potential adverse effects on animal health and performance caused by the addition of mineral adsorbents to feeds to reduce mycotoxin exposure. Mycotoxin Res 2020; 36:115-126. [PMID: 31515765 PMCID: PMC6971152 DOI: 10.1007/s12550-019-00375-7] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Revised: 09/02/2019] [Accepted: 09/04/2019] [Indexed: 12/29/2022]
Abstract
The contamination of feed with mycotoxins is a continuing feed quality and safety issue, leading to significant losses in livestock production and potential human health risks. Consequently, various methods have been developed to reduce the occurrence of mycotoxins in feed; however, feed supplementation with clay minerals or mineral adsorbents is the most prominent approach widely practiced by farmers and the feed industry. Due to a negatively charged and high surface area, pore volume, swelling ability, and high cation exchange capacity, mineral adsorbents including bentonite, zeolite, montmorillonite, and hydrated sodium calcium aluminosilicate can bind or adsorb mycotoxins to their interlayer spaces, external surface, and edges. Several studies have shown these substances to be partly or fully effective in counteracting toxic effects of mycotoxins in farm animals fed contaminated diets and thus are extensively used in livestock production to reduce the risk of mycotoxin exposure. Nevertheless, a considerable number of studies have indicated that these agents may also cause undesirable effects in farm animals. The current work aims to review published reports regarding adverse effects that may arise in farm animals (with a focus on pig and poultry) and potential interaction with veterinary substances and nutrients in feeds, when mineral adsorbents are utilized as a technological feed additive. Furthermore, results of in vitro toxicity studies of both natural and modified mineral adsorbents on different cell lines are reported. Supplementation of mycotoxin-contaminated feed with mineral adsorbents must be carefully considered by farmers and feed industry.
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Affiliation(s)
- Christopher T Elliott
- Institute for Global Food Security, School of Biological Sciences, Queens University Belfast, Belfast, UK.
| | - Lisa Connolly
- Institute for Global Food Security, School of Biological Sciences, Queens University Belfast, Belfast, UK
| | - Oluwatobi Kolawole
- Institute for Global Food Security, School of Biological Sciences, Queens University Belfast, Belfast, UK
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Brooks SJ, Escudero-Oñate C, Lillicrap AD. An ecotoxicological assessment of mine tailings from three Norwegian mines. CHEMOSPHERE 2019; 233:818-827. [PMID: 31200140 DOI: 10.1016/j.chemosphere.2019.06.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Revised: 05/31/2019] [Accepted: 06/01/2019] [Indexed: 06/09/2023]
Abstract
The study assessed the environmental toxicity of three Norwegian mine tailings from Omya Hustadmarmor, Sydvaranger, and Sibelco, which are all released into a seawater recipient. Ecotoxicity assessments were performed on the overlying water extracted from the mine tailings, the transformation/dissolution waters obtained from the mine tailings, and whole sediment assessment using a suite of marine organisms including algae, Crustacea, and Mollusca. Overall, based on the toxicity evaluation of the transformation/dissolution data, Sibelco tailings resulted in the highest toxicity albeit at relatively high concentrations, followed by Sydvaranger and Hustadmarmor. Sibelco was the only mine where process chemicals were not used. In contrast, the Corophium sediment contact assay revealed a significantly higher toxicity exerted by Hustadmarmor tailings, which may indicate a physical impact of the fine tailings. The effects observed were discussed with respect to both the measured chemical concentrations of the tailings and the potential physical impact of the tailing particles on organism health.
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Affiliation(s)
- Steven J Brooks
- Norwegian Institute for Water Research (NIVA), Gaustadalléen 21, NO-0349, Oslo, Norway.
| | - Carlos Escudero-Oñate
- Norwegian Institute for Water Research (NIVA), Gaustadalléen 21, NO-0349, Oslo, Norway
| | - Adam D Lillicrap
- Norwegian Institute for Water Research (NIVA), Gaustadalléen 21, NO-0349, Oslo, Norway
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The influence of mineral particles on fibroblast behaviour: A comparative study. Colloids Surf B Biointerfaces 2018; 167:239-251. [DOI: 10.1016/j.colsurfb.2018.04.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Revised: 03/29/2018] [Accepted: 04/04/2018] [Indexed: 10/17/2022]
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Sushma, Kumar H, Ahmad I, Dutta PK. In-vitro toxicity induced by quartz nanoparticles: Role of ER stress. Toxicology 2018; 404-405:1-9. [DOI: 10.1016/j.tox.2018.05.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Revised: 04/13/2018] [Accepted: 05/02/2018] [Indexed: 01/13/2023]
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Interactions of Microplastics with Freshwater Biota. THE HANDBOOK OF ENVIRONMENTAL CHEMISTRY 2018. [DOI: 10.1007/978-3-319-61615-5_8] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Le Blond JS, Baxter PJ, Bello D, Raftis J, Molla YB, Cuadros J, Davey G. Haemolytic activity of soil from areas of varying podoconiosis endemicity in Ethiopia. PLoS One 2017; 12:e0177219. [PMID: 28493920 PMCID: PMC5426718 DOI: 10.1371/journal.pone.0177219] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2016] [Accepted: 04/24/2017] [Indexed: 02/05/2023] Open
Abstract
Background Podoconiosis, non-filarial elephantiasis, is a non-infectious disease found in tropical regions such as Ethiopia, localized in highland areas with volcanic soils cultivated by barefoot subsistence farmers. It is thought that soil particles can pass through the soles of the feet and taken up by the lymphatic system, leading to the characteristic chronic oedema of the lower legs that becomes disfiguring and disabling over time. Methods The close association of the disease with volcanic soils led us to investigate the characteristics of soil samples in an endemic area in Ethiopia to identify the potential causal constituents. We used the in vitro haemolysis assay and compared haemolytic activity (HA) with soil samples collected in a non-endemic region of the same area in Ethiopia. We included soil samples that had been previously characterized, in addition we present other data describing the characteristics of the soil and include pure phase mineral standards as comparisons. Results The bulk chemical composition of the soils were statistically significantly different between the podoconiosis-endemic and non-endemic areas, with the exception of CaO and Cr. Likewise, the soil mineralogy was statistically significant for iron oxide, feldspars, mica and chlorite. Smectite and kaolinite clays were widely present and elicited a strong HA, as did quartz, in comparison to other mineral phases tested, although no strong difference was found in HA between soils from the two areas. The relationship was further investigated with principle component analysis (PCA), which showed that a combination of an increase in Y, Zr and Al2O3, and a concurrent increase Fe2O3, TiO2, MnO and Ba in the soils increased HA. Conclusion The mineralogy and chemistry of the soils influenced the HA, although the interplay between the components is complex. Further research should consider the variable biopersistance, hygroscopicity and hardness of the minerals and further characterize the nano-scale particles.
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Affiliation(s)
- Jennifer S. Le Blond
- Department of Earth Sciences, Imperial College London, London, United Kingdom
- Core Research Labs, Natural History Museum, London, United Kingdom
- * E-mail:
| | - Peter J. Baxter
- Institute of Public Health, University of Cambridge, Cambridge, United Kingdom
| | - Dhimiter Bello
- Department of Work Environment, University of Massachusetts Lowell, MA, United States of America
| | - Jennifer Raftis
- The Queens Medical Research Institute, University of Edinburgh, Little France, Edinburgh, United Kingdom
| | - Yordanos B. Molla
- Department of Earth Sciences, Addis Ababa University, Addis Ababa, Ethiopia
- Wellcome Trust Centre for Global Health Research, Brighton and Sussex Medical School, University of Sussex, Brighton, East Sussex United Kingdom
| | - Javier Cuadros
- Department of Earth Sciences, Natural History Museum, London, United Kingdom
| | - Gail Davey
- Wellcome Trust Centre for Global Health Research, Brighton and Sussex Medical School, University of Sussex, Brighton, East Sussex United Kingdom
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Schmitz M, Baekelandt S, Tran Thi LK, Mandiki SNM, Douxfils J, Nguyen TQ, Do Thi Thanh H, Kestemont P. Osmoregulatory and immunological status of the pond-raised striped catfish (Pangasianodon hypophthalmus S.) as affected by seasonal runoff and salinity changes in the Mekong Delta, Vietnam. FISH PHYSIOLOGY AND BIOCHEMISTRY 2017; 43:39-49. [PMID: 27435745 DOI: 10.1007/s10695-016-0266-7] [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: 11/26/2015] [Accepted: 07/11/2016] [Indexed: 06/06/2023]
Abstract
In Vietnam, the production of striped catfish Pangasianodon hypophthalmus S. reached more than 1.2 millions of tons in 2014 and is mainly gathered in the Mekong Delta (South Vietnam). A survey was carried out during the dry season 2013 (March-April) and rainy season 2014 (July-August) in 12 fish farms of the lower (Tra Vinh Province) and higher (Can Tho Province) Mekong River Delta. This study allowed drawing up current key osmoregulatory and innate immune parameters of striped catfish in aquaculture depending on the geographical location, particularly the proximity to the River Mekong Estuary and the seasonal surface runoff. In the dry season, plasma osmolality was positively correlated with salinity. Gill Na+K+ ATPase dropped in the rainy season, while kidney Na+K+ ATPase remained stable. Abundance of immune blood cells, especially thrombocytes and monocytes, tended to increase in farms located in tidal area. Production of reactive oxygen species in the spleen, kidney lysozyme activity and plasma complement activity did not vary whatever the season or the proximity to the estuary. Plasma lysozyme activity was 50-fold higher than in kidney and increased in the rainy season as well as in tidal sites. Kidney complement activity decreased in the dry season, especially in tidal sites. In conclusion, regarding key osmoregulatory and immune factors, striped catfish farms located in the Mekong Delta may be affected by seasonal and regional salinity and runoff fluctuations.
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Affiliation(s)
- Mélodie Schmitz
- Research Unit in Environmental and Evolutionary Biology, University of Namur, Rue de Bruxelles 61, 5000, Namur, Belgium.
| | - Sébastien Baekelandt
- Research Unit in Environmental and Evolutionary Biology, University of Namur, Rue de Bruxelles 61, 5000, Namur, Belgium
| | - Lam Khoa Tran Thi
- College of Aquaculture and Fisheries, Can Tho University, 3/2 Street, Campus II, Can Tho City, Vietnam
| | - Syaghalirwa N M Mandiki
- Research Unit in Environmental and Evolutionary Biology, University of Namur, Rue de Bruxelles 61, 5000, Namur, Belgium
| | - Jessica Douxfils
- Research Unit in Environmental and Evolutionary Biology, University of Namur, Rue de Bruxelles 61, 5000, Namur, Belgium
| | - Thinh Quoc Nguyen
- College of Aquaculture and Fisheries, Can Tho University, 3/2 Street, Campus II, Can Tho City, Vietnam
| | - Huong Do Thi Thanh
- College of Aquaculture and Fisheries, Can Tho University, 3/2 Street, Campus II, Can Tho City, Vietnam
| | - Patrick Kestemont
- Research Unit in Environmental and Evolutionary Biology, University of Namur, Rue de Bruxelles 61, 5000, Namur, Belgium
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Blarer P, Burkhardt-Holm P. Microplastics affect assimilation efficiency in the freshwater amphipod Gammarus fossarum. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:23522-23532. [PMID: 27614640 DOI: 10.1007/s11356-016-7584-2] [Citation(s) in RCA: 131] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Accepted: 09/02/2016] [Indexed: 05/20/2023]
Abstract
An important issue in assessing microplastics is whether this newly emerging type of pollution affects freshwater invertebrates. This study was designed to examine the interactions between the amphipod Gammarus fossarum and two types of microplastics. To determine the ingestion and egestion of polyamide (PA) fibres (500 × 20 μm), amphipods were exposed to four concentrations (100, 540, 2680, 13,380 PA fibres cm-2 base area of glass beakers) and four exposure times (0.5, 2, 8, 32 h) as well as four post-exposure times (1, 2, 4, 16 h). We demonstrate a positive correlation between concentration and ingestion of PA fibres. Fibres were found in the gut after 0.5 h of exposure. Egestion was rapid and the digestive tract was empty 16 h after exposure ended. To investigate whether polystyrene (PS) beads (1.6 μm) can be taken up in the epithelial cells of the gut and the midgut glands, four concentrations (500, 2500, 12,500, 60,000 PS beads mL-1) were tested. Cryosections exhibited fluorescent PS beads only within the gut lumen. In a 28-day feeding experiment with both, fibres and beads, we studied the amphipod's feeding rate, assimilation efficiency and wet weight change. The exposure to PA fibres (2680 PA fibres cm-2 base area of glass beakers) significantly reduced the assimilation efficiency of the animals. While both tested polymer types are ingested and egested, PA fibres can impair the health and ecological functions of freshwater amphipods under continuous exposure.
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Affiliation(s)
- Pascal Blarer
- Man-Society-Environment (Programme MGU), Department of Environmental Sciences, University of Basel, Vesalgasse 1, 4051, Basel, Switzerland
| | - Patricia Burkhardt-Holm
- Man-Society-Environment (Programme MGU), Department of Environmental Sciences, University of Basel, Vesalgasse 1, 4051, Basel, Switzerland.
- Department of Biological Sciences, University of Alberta, Edmonton, Canada.
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Zeng F, Sherry JP, Bols NC. Use of the rainbow trout cell lines, RTgill-W1 and RTL-W1 to evaluate the toxic potential of benzotriazoles. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2016; 124:315-323. [PMID: 26584462 DOI: 10.1016/j.ecoenv.2015.11.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2015] [Revised: 10/30/2015] [Accepted: 11/02/2015] [Indexed: 06/05/2023]
Abstract
Epithelial cell lines, RTgill-W1 and RTL-W1 from respectively gill and liver of rainbow trout, Onchorhynchus mykiss (Walbaum), were used to evaluate the toxic potential of six benzotriazoles (BTRs) and tolytriazole (TT), which is a commercial mixture of 4-methyl-1H-benzotriazole (4MBTR) and 5-methyl-1H-benzotriazole (5MBTR). The other BTRs were 1H-benzotriazole (1H-BTR), 5-chlorobenzotriazole (5CBTR), 1-hydroxybenzotriazole (1OHBTR) and 5,6-dimethyl-1H-benzotriazole monohydrate (DM). Except for DM, all BTRs were cytotoxic at concentrations above 15mg/L and transitorily elevated reactive oxygen species (ROS) levels. Neither N-acetyl cysteine (NAC) nor IM-54 inhibited cytotoxicity, suggesting that ROS were not the major cause of the cell death. Cell death was not blocked by Necrostatin nor accompanied by DNA laddering, suggesting that the cell death mechanism was neither necroptosis nor apoptosis. As judged by the comet assay, DNA strand breaks were detected with three BTRs: 4MBTR, 5MBTR and 5CBTR. In RTL-W1, the BTRs weakly induced cytochrome P4501A, suggesting that they have the potential to alter xenobiotic metabolism and activate the aryl hydrocarbon receptor. In summary, the toxic potential of BTRs appears to be limited to only high concentrations, which are higher than have been measured in the environment to date.
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Affiliation(s)
- Fanxing Zeng
- Department of Biology, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1
| | - James P Sherry
- Aquatic Contaminants Research Division, Environment Canada, Burlington, Ontario, Canada L7R 4A6
| | - Niels C Bols
- Department of Biology, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1.
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Pietsch C, Hollender J, Dorusch F, Burkhardt-Holm P. Cytotoxic effects of pentachlorophenol (PCP) and its metabolite tetrachlorohydroquinone (TCHQ) on liver cells are modulated by antioxidants. Cell Biol Toxicol 2014; 30:233-52. [DOI: 10.1007/s10565-014-9283-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2014] [Accepted: 06/25/2014] [Indexed: 11/29/2022]
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Pietsch C, Noser J, Wettstein FE, Burkhardt-Holm P. Unraveling the mechanisms involved in zearalenone-mediated toxicity in permanent fish cell cultures. Toxicon 2014; 88:44-61. [PMID: 24950048 DOI: 10.1016/j.toxicon.2014.06.005] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2014] [Revised: 05/30/2014] [Accepted: 06/10/2014] [Indexed: 11/29/2022]
Abstract
The world-wide occurrence of zearalenone (ZEN) as a contaminant in feed for farm animals and fish requires the evaluation of toxicity mechanisms of action of ZEN. The present study investigates possible metabolization of ZEN in fish cell lines suggesting that mainly glucuronidation takes place. It demonstrates that concentrations up to 20,000 ng ml(-1) ZEN are capable of influencing cell viability in permanent fish cell cultures in a dose-response manner with different response patterns between the five tested cell lines, whereby lysosomes appeared to be the main target of ZEN. ZEN toxicity is often discussed in the context of oxidative stress. Our study shows a biphasic response of the cell lines when reactive oxygen species (ROS) production is monitored. Damage in cells was observed by measuring lipid peroxidation, DNA strand breaks, and alterations of intracellular glutathione levels. Metabolization of ZEN, especially at concentrations above 7500 ng ml(-1) ZEN, does not prevent cytotoxicity. ZEN as an estrogenic compound may involve processes mediated by binding to estrogen receptors (ER). Since one cell line showed no detectable expression of ER, an ER-mediated pathway seems to be unlikely in these cells. This confirms a lysosomal pathway as a main target of ZEN in fish cells.
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Affiliation(s)
- Constanze Pietsch
- Zurich University of Applied Sciences (ZHAW), Institute of Natural Resource Sciences (IUNR), Gruental, P.O. Box, CH-8820 Waedenswil, Switzerland; Programm Man - Society - Environment, Department of Environmental Sciences, University of Basel, Vesalgasse 1, CH-4051 Basel, Switzerland.
| | - Jürg Noser
- Kantonales Laboratorium Basel, Gräubernstrasse 12, CH-4410 Liestal, Switzerland
| | - Felix E Wettstein
- Agroscope Reckenholz-Tänikon (ART), Research Station ART, Reckenholzstrasse 191, CH-8046 Zürich, Switzerland
| | - Patricia Burkhardt-Holm
- Programm Man - Society - Environment, Department of Environmental Sciences, University of Basel, Vesalgasse 1, CH-4051 Basel, Switzerland; Department of Biological Sciences, University of Alberta, CW 405 Biological Sciences Building, T6G 2E9, Edmonton, AB, Canada
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