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Hu JMY, Arbuckle TE, Janssen PA, Lanphear BP, Alampi JD, Braun JM, MacFarlane AJ, Chen A, McCandless LC. Gestational exposure to organochlorine compounds and metals and infant birth weight: effect modification by maternal hardships. Environ Health 2024; 23:60. [PMID: 38951908 PMCID: PMC11218229 DOI: 10.1186/s12940-024-01095-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2024] [Accepted: 06/06/2024] [Indexed: 07/03/2024]
Abstract
BACKGROUND Gestational exposure to toxic environmental chemicals and maternal social hardships are individually associated with impaired fetal growth, but it is unclear whether the effects of environmental chemical exposure on infant birth weight are modified by maternal hardships. METHODS We used data from the Maternal-Infant Research on Environmental Chemicals (MIREC) Study, a pan-Canadian cohort of 1982 pregnant females enrolled between 2008 and 2011. We quantified eleven environmental chemical concentrations from two chemical classes - six organochlorine compounds (OCs) and five metals - that were detected in ≥ 70% of blood samples collected during the first trimester. We examined fetal growth using birth weight adjusted for gestational age and assessed nine maternal hardships by questionnaire. Each maternal hardship variable was dichotomized to indicate whether the females experienced the hardship. In our analysis, we used elastic net to select the environmental chemicals, maternal hardships, and 2-way interactions between maternal hardships and environmental chemicals that were most predictive of birth weight. Next, we obtained effect estimates using multiple linear regression, and plotted the relationships by hardship status for visual interpretation. RESULTS Elastic net selected trans-nonachlor, lead, low educational status, racially minoritized background, and low supplemental folic acid intake. All were inversely associated with birth weight. Elastic net also selected interaction terms. Among those with increasing environmental chemical exposures and reported hardships, we observed stronger negative associations and a few positive associations. For example, every two-fold increase in lead concentrations was more strongly associated with reduced infant birth weight among participants with low educational status (β = -100 g (g); 95% confidence interval (CI): -215, 16), than those with higher educational status (β = -34 g; 95% CI: -63, -3). In contrast, every two-fold increase in mercury concentrations was associated with slightly higher birth weight among participants with low educational status (β = 23 g; 95% CI: -25, 71) compared to those with higher educational status (β = -9 g; 95% CI: -24, 6). CONCLUSIONS Our findings suggest that maternal hardships can modify the associations of gestational exposure to some OCs and metals with infant birth weight.
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Affiliation(s)
- Janice M Y Hu
- Environmental Health Science and Research Bureau, Healthy Environments and Consumer Safety Branch, Health Canada, 101 Tunney's Pasture Driveway, Ottawa, ON, K1A 0K9, Canada.
- Faculty of Health Sciences, Simon Fraser University, Burnaby, BC, V5A 1S6, Canada.
| | - Tye E Arbuckle
- Environmental Health Science and Research Bureau, Healthy Environments and Consumer Safety Branch, Health Canada, 101 Tunney's Pasture Driveway, Ottawa, ON, K1A 0K9, Canada
| | - Patricia A Janssen
- School of Population and Public Health, University of British Columbia, Vancouver, BC, V6T 1Z4, Canada
| | - Bruce P Lanphear
- Faculty of Health Sciences, Simon Fraser University, Burnaby, BC, V5A 1S6, Canada
| | - Joshua D Alampi
- Faculty of Health Sciences, Simon Fraser University, Burnaby, BC, V5A 1S6, Canada
| | - Joseph M Braun
- Department of Epidemiology, Brown University, Providence, RI, USA
| | - Amanda J MacFarlane
- Texas A&M Agriculture, Food and Nutrition Evidence Center, Fort Worth, TX, USA
| | - Aimin Chen
- Department of Biostatistics, Epidemiology and Informatics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
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Whitehead DA, Gayford JH, Pancaldi F, Gobbato J, Boldrin G, Tringali M, Ketchum JT, Magaña FG, Seveso D, Montano S. Heavy metal and trace element concentrations in the blood of scalloped hammerhead sharks (Sphyrna lewini) from La Paz Bay, México. MARINE POLLUTION BULLETIN 2024; 201:116155. [PMID: 38401387 DOI: 10.1016/j.marpolbul.2024.116155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 02/05/2024] [Accepted: 02/09/2024] [Indexed: 02/26/2024]
Abstract
Sharks are particularly susceptible to bioaccumulation due to their life history characteristics and trophic position within marine ecosystems. Despite this, studies of bioaccumulation cover only a small proportion of extant species. In this study we report concentrations of trace elements and heavy metals in blood samples of Sphyrna lewini for the first time. We report high concentrations of several trace elements and heavy metals, with concentrations of some elements exceeding the limit determined safe for human consumption. High elemental concentrations may reflect biochemical differences between blood plasma and other tissues; however, they may also be symptomatic of high levels of exposure triggered by anthropogenic activities. We also provide evidence of elemental accumulation through ontogeny, the nature of which differs from that previously reported. Ultimately, this baseline study increases our understanding of interspecific and intraspecific variation in bioaccumulation and ecotoxicology in elasmobranchs which may prove important in ensuring adequate management.
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Affiliation(s)
- Darren A Whitehead
- Investigación Tiburones Mexico A.C, Mexico; Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, 23096 La Paz, Mexico.
| | - Joel H Gayford
- Department of Life Sciences, Silwood Park Campus, Imperial College London, United Kingdom; Shark Measurements, London, United Kingdom
| | - Francesca Pancaldi
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, 23096 La Paz, Mexico
| | - Jacopo Gobbato
- Department of Earth and Environmental Sciences (DISAT), University of Milano-Bicocca, Piazza Della Scienza 1, 20126 Milan, Italy; MaRHE Center (Marine Research and High Education Center), Magoodhoo Island, Faafu Atoll 12030, Maldives
| | - Giulia Boldrin
- Department of Earth and Environmental Sciences (DISAT), University of Milano-Bicocca, Piazza Della Scienza 1, 20126 Milan, Italy
| | - Maria Tringali
- Department of Earth and Environmental Sciences (DISAT), University of Milano-Bicocca, Piazza Della Scienza 1, 20126 Milan, Italy
| | - James T Ketchum
- Pelagios Kakunjá A.C., 23060 La Paz, Mexico; Centro de Investigaciones Biológicas Noroeste (CIBNOR), La Paz, B.C.S., Mexico; MigraMar, Bodega Bay, CA, United States of America
| | - Felipe Galvan Magaña
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, 23096 La Paz, Mexico
| | - Davide Seveso
- Department of Earth and Environmental Sciences (DISAT), University of Milano-Bicocca, Piazza Della Scienza 1, 20126 Milan, Italy; MaRHE Center (Marine Research and High Education Center), Magoodhoo Island, Faafu Atoll 12030, Maldives
| | - Simone Montano
- Department of Earth and Environmental Sciences (DISAT), University of Milano-Bicocca, Piazza Della Scienza 1, 20126 Milan, Italy; MaRHE Center (Marine Research and High Education Center), Magoodhoo Island, Faafu Atoll 12030, Maldives
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3
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Zareba G, Harrington D, Scrimale T, Lesperance A, Watson GE, van Wijngaarden E, Shamlaye CF, Nicholas T, Myers GJ, Thurston SW. Relationship of mercury and selenium in ocean fish frequently consumed in the Seychelles: A comparison to levels in ocean fish consumed in the US. Neurotoxicology 2023; 99:34-42. [PMID: 37678724 PMCID: PMC10873038 DOI: 10.1016/j.neuro.2023.09.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2023] [Revised: 08/29/2023] [Accepted: 09/03/2023] [Indexed: 09/09/2023]
Abstract
We characterized mercury and selenium in the fish consumed in the Seychelles Islands to determine if their levels are similar to fish consumed in the US. A secondary aim was to examine whether fish weight and species predict mercury and selenium in fish consumed in the Seychelles. We measured total mercury (THg) and selenium (Se) content of 10 samples from each of the 19 most frequently consumed fish species in Seychelles and for each calculated the Se:Hg molar ratios and the Selenium Health Benefit Value Index (HBV Se). Linear regression models examined associations with weight and species. Average MeHg levels in fish ranged from less than 0.01 ppm (streamlined spinefoot) to 0.7 ppm (bludger trevally) with an overall mean of 0.21 ± 0.23 ppm. Average Se levels ranged from 0.34 ppm (blue-barred parrot fish) to 0.93 ppm (blue-lined large-eye bream) with a mean of 0.54 ± 0.23 ppm. All fish species had a mean Se:Hg molar ratio > 1 and positive mean HBV Se index values. Weight was strongly predictive of MeHg and Se:Hg molar ratio, both across and within most species, but was less predictive of Se and HBV Se. Our study demonstrated that fish consumed in Seychelles have mercury and selenium content similar to that of fish consumed in the US. Fish in both countries have favorable positive values for Se:Hg molar ratios and HBV Se indexes. Because mercury and selenium concentrations in fish are similar to those in the US but fish consumption is substantially higher in Seychelles, the Seychellois make an ideal population in which to determine if there are adverse effects of prenatal, postnatal, and lifetime low dose MeHg exposure from fish consumption.
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Affiliation(s)
- Grazyna Zareba
- Department of Environmental Medicine, University of Rochester, 601 Elmwood Avenue, Box EHSC, Rochester, NY 14642, USA
| | - Donald Harrington
- Department of Biostatistics and Computational Biology, University of Rochester, 601 Elmwood Avenue, Box 630, Rochester, NY 14642, USA
| | - Tom Scrimale
- Department of Environmental Medicine, University of Rochester, 601 Elmwood Avenue, Box EHSC, Rochester, NY 14642, USA
| | - Aubrey Lesperance
- Seychelles Fishing Authority (SFA), Fishing Port, Victoria P.O. Box 449, Mahé, Seychelles
| | - Gene E Watson
- Department of Environmental Medicine, University of Rochester, 601 Elmwood Avenue, Box EHSC, Rochester, NY 14642, USA; Eastman Institute for Oral Health, and Department of Pharmacology and Physiology, University of Rochester, 601 Elmwood Avenue, Box 705, Rochester, NY 14642, USA
| | - Edwin van Wijngaarden
- Department of Environmental Medicine, University of Rochester, 601 Elmwood Avenue, Box EHSC, Rochester, NY 14642, USA; Department of Public Health Sciences; University of Rochester Medical Center, Rochester, NY, USA
| | - Conrad F Shamlaye
- Republic of Seychelles Ministry of Health and Social Services, Victoria, Mahé, Seychelles
| | - Tyler Nicholas
- Department of Environmental Medicine, University of Rochester, 601 Elmwood Avenue, Box EHSC, Rochester, NY 14642, USA
| | - Gary J Myers
- Department of Environmental Medicine, University of Rochester, 601 Elmwood Avenue, Box EHSC, Rochester, NY 14642, USA; Department of Public Health Sciences; University of Rochester Medical Center, Rochester, NY, USA; Department of Pediatrics, University of Rochester, 601 Elmwood Avenue, Rochester, NY 14642, USA; Department of Neurology, University of Rochester, 601 Elmwood Avenue, Rochester, NY 14642, USA
| | - Sally W Thurston
- Department of Environmental Medicine, University of Rochester, 601 Elmwood Avenue, Box EHSC, Rochester, NY 14642, USA; Department of Biostatistics and Computational Biology, University of Rochester, 601 Elmwood Avenue, Box 630, Rochester, NY 14642, USA.
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Wang T, Yang X, Li Z, Chen W, Wen X, He Y, Ma C, Yang Z, Zhang C. MeHg production in eutrophic lakes: Focusing on the roles of algal organic matter and iron-sulfur-phosphorus dynamics. JOURNAL OF HAZARDOUS MATERIALS 2023; 457:131682. [PMID: 37270963 DOI: 10.1016/j.jhazmat.2023.131682] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 05/20/2023] [Accepted: 05/21/2023] [Indexed: 06/06/2023]
Abstract
The mechanisms by which eutrophication affects methylmercury (MeHg) production have not been comprehensively summarized, which hinders accurately predicting the MeHg risk in eutrophic lakes. In this review, we first discussed the effects of eutrophication on biogeochemical cycle of mercury (Hg). Special attentions were paid to the roles of algal organic matter (AOM) and iron (Fe)-sulfur (S)-phosphorus (P) dynamics in MeHg production. Finally, the suggestions for risk control of MeHg in eutrophic lakes were proposed. AOM can affect in situ Hg methylation by stimulating the abundance and activities of Hg methylating microorganisms and regulating Hg bioavailability, which are dependent on bacteria-strain and algae species, the molecular weight and composition of AOM as well as environmental conditions (e.g., light). Fe-S-P dynamics under eutrophication including sulfate reduction, FeS formation and P release could also play crucial but complicated roles in MeHg production, in which AOM may participate through influencing the dissolution and aggregation processes, structural order and surface properties of HgS nanoparticles (HgSNP). Future studies should pay more attention to the dynamics of AOM in responses to the changing environmental conditions (e.g., light penetration and redox fluctuations) and how such variations will subsequently affect MeHg production. The effects of Fe-S-P dynamics on MeHg production under eutrophication also deserve further investigations, especially the interactions between AOM and HgSNP. Remediation strategies with lower disturbance, greater stability and less cost like the technology of interfacial O2 nanobubbles are urgent to be explored. This review will deepen our understanding of the mechanisms of MeHg production in eutrophic lakes and provide theoretical guidance for its risk control.
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Affiliation(s)
- Tantan Wang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Xu Yang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Zihao Li
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Wenhao Chen
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Xin Wen
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Yubo He
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Chi Ma
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Zhongzhu Yang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Chang Zhang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China.
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5
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Magnuson JT, Sandheinrich MB. Relation among Mercury, Selenium, and Biomarkers of Oxidative Stress in Northern Pike ( Esox lucius). TOXICS 2023; 11:244. [PMID: 36977009 PMCID: PMC10057176 DOI: 10.3390/toxics11030244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/04/2023] [Revised: 02/22/2023] [Accepted: 03/03/2023] [Indexed: 06/18/2023]
Abstract
Mercury (Hg) is a toxic environmental contaminant associated with oxidative stress in freshwater fish. A known antagonist to Hg, selenium (Se), may reduce the toxic effects of Hg. In this study, the relation among Se, methylmercury (MeHg), inorganic mercury (IHg), total mercury (THg), and the expression of biomarkers of oxidative stress and metal regulation in livers of northern pike were examined. Livers from northern pike were collected from 12 lakes in Isle Royale National Park, Pictured Rocks National Lakeshore, Sleeping Bear Dunes National Lakeshore, and Voyageurs National Park. The concentrations of MeHg, THg, and Se were measured in liver tissue, and the expression of superoxide dismutase (sod), catalase (cat), glutathione s-transferase (gst), and metallothionein (mt) was assessed. There was a positive relationship between the concentrations of THg and Se, with a Hg:Se molar ratio less than one in all livers examined. There was no significant relation between sod, cat, gst, or mt expression and Hg:Se molar ratios. cat and sod expression were significantly related to increases in percent MeHg, relative to THg; however, gst and mt expression were not significantly altered. This suggests that incorporating biomarkers containing Se may be a better indicator than non-selenium-containing proteins of assessing the long-term effect of Hg and the interactions between Hg and Se in the livers of fish, such as northern pike, especially when molar concentrations of Se are greater than Hg.
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Kljaković-Gašpić Z, Dvoršćak M, Orct T, Sekovanić A, Klinčić D, Jagić K, Šebešćen D, Klasiček E, Zanella D. Metal(loid)s and persistent organic pollutants in yellow European eel from the Raša River, Croatia. MARINE POLLUTION BULLETIN 2023; 187:114527. [PMID: 36608477 DOI: 10.1016/j.marpolbul.2022.114527] [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: 09/29/2022] [Revised: 11/25/2022] [Accepted: 12/20/2022] [Indexed: 06/17/2023]
Abstract
The anthropogenic impact on the aquatic environment of the Raša River (Croatia) was investigated through the analysis of seven polybrominated diphenyl ethers (PBDEs), seven polychlorinated biphenyls (PCBs), three DDT isomers, and 22 major and trace elements using yellow European eel (Anguilla anguilla L.) as a biological indicator of contamination. The obtained data indicated generally low contamination status in the surrounding area. Levels of all organic contaminants in muscle significantly increased with lipid content, length, weight and body condition. In both muscle and liver, most metal(loid)s decreased or remained unchanged with increasing size, while at downstream location only several elements (Cd, Cu, Fe, Na, Se, U, V, Zn) accumulated in the liver with fish growth. Spatial analysis revealed higher pressure of Ag, Cd, Cr, Mo, Tl, U, and V at the downstream location, revealing the potentially limited impact of historical coal mining industry on the lower reaches of the Raša River.
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Affiliation(s)
- Zorana Kljaković-Gašpić
- Institute for Medical Research and Occupational Health, Ksaverska cesta 2, 10 000 Zagreb, Croatia
| | - Marija Dvoršćak
- Institute for Medical Research and Occupational Health, Ksaverska cesta 2, 10 000 Zagreb, Croatia.
| | - Tatjana Orct
- Institute for Medical Research and Occupational Health, Ksaverska cesta 2, 10 000 Zagreb, Croatia
| | - Ankica Sekovanić
- Institute for Medical Research and Occupational Health, Ksaverska cesta 2, 10 000 Zagreb, Croatia
| | - Darija Klinčić
- Institute for Medical Research and Occupational Health, Ksaverska cesta 2, 10 000 Zagreb, Croatia
| | - Karla Jagić
- Institute for Medical Research and Occupational Health, Ksaverska cesta 2, 10 000 Zagreb, Croatia
| | - Dora Šebešćen
- Institute for Medical Research and Occupational Health, Ksaverska cesta 2, 10 000 Zagreb, Croatia; University of Zagreb, Faculty of Science, Department of Biology, Rooseveltov trg 6, 10 000 Zagreb, Croatia
| | - Elena Klasiček
- Institute for Medical Research and Occupational Health, Ksaverska cesta 2, 10 000 Zagreb, Croatia; University of Zagreb, Faculty of Science, Department of Biology, Rooseveltov trg 6, 10 000 Zagreb, Croatia
| | - Davor Zanella
- University of Zagreb, Faculty of Science, Department of Biology, Rooseveltov trg 6, 10 000 Zagreb, Croatia
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Kljaković-Gašpić Z, Sekovanić A, Orct T, Šebešćen D, Klasiček E, Zanella D. Potentially Toxic Elements in Water, Sediments and Fish from the Karstic River (Raša River, Croatia) Located in the Former Coal-Mining Area. TOXICS 2022; 11:42. [PMID: 36668768 PMCID: PMC9865867 DOI: 10.3390/toxics11010042] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 12/27/2022] [Accepted: 12/28/2022] [Indexed: 06/17/2023]
Abstract
The assessment of the environmental quality of a sensitive karst aquatic system under the centuries-long anthropogenic influence of the coal mining industry is important for both improving the quality of water resources and protecting aquatic wildlife and human health. In this study, we investigated the anthropogenic impact on the aquatic environment of the upper and middle course of the Raša River through the analysis of a suite of metal(loid)s in three aquatic compartments (water, sediment, fish) using inductively coupled plasma mass spectrometry (ICP-MS). Concentrations of inorganic constituents in water were low, while the chemical composition of stream sediments mainly reflected the geological background of the area, indicating the origin of metal(loid)s from predominantly natural sources. Although comparison with PEC-Q values indicated that existing sediment quality conditions could pose a threat to benthic organisms with regard to Cr and Ni, the constant vertical profiles of these elements suggested their natural origin from the weathering of flysch. Element levels in the muscle of targeted fish species were in accordance with the values typical for low-contaminated freshwater systems, while levels of Cd, Pb and Hg were mostly below the European regulatory limits for toxic elements in foods, indicating that the low concentrations of most contaminants in muscles of fish from the Raša River do not present a risk to humans or other consumers. The obtained data indicated a generally low contamination status of the western part of the Raša River basin with regard to the analyzed inorganic elements.
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Affiliation(s)
- Zorana Kljaković-Gašpić
- Analytical Toxicology and Mineral Metabolism Unit, Institute for Medical Research and Occupational Health, Ksaverska Cesta 2, 10000 Zagreb, Croatia
| | - Ankica Sekovanić
- Analytical Toxicology and Mineral Metabolism Unit, Institute for Medical Research and Occupational Health, Ksaverska Cesta 2, 10000 Zagreb, Croatia
| | - Tatjana Orct
- Analytical Toxicology and Mineral Metabolism Unit, Institute for Medical Research and Occupational Health, Ksaverska Cesta 2, 10000 Zagreb, Croatia
| | - Dora Šebešćen
- Analytical Toxicology and Mineral Metabolism Unit, Institute for Medical Research and Occupational Health, Ksaverska Cesta 2, 10000 Zagreb, Croatia
- Department of Biology, Faculty of Science, University of Zagreb, Rooseveltov trg 6, 10000 Zagreb, Croatia
| | - Elena Klasiček
- Analytical Toxicology and Mineral Metabolism Unit, Institute for Medical Research and Occupational Health, Ksaverska Cesta 2, 10000 Zagreb, Croatia
- Department of Biology, Faculty of Science, University of Zagreb, Rooseveltov trg 6, 10000 Zagreb, Croatia
| | - Davor Zanella
- Department of Biology, Faculty of Science, University of Zagreb, Rooseveltov trg 6, 10000 Zagreb, Croatia
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Taylor S, Terkildsen M, McQuilty R, Lee D, Wing-Simpson A, Gray R. Non-essential heavy metals and protective effects of selenium against mercury toxicity in endangered Australian sea lion (Neophoca cinerea) pups with hookworm disease. ENVIRONMENT INTERNATIONAL 2022; 169:107521. [PMID: 36148712 DOI: 10.1016/j.envint.2022.107521] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2022] [Revised: 08/06/2022] [Accepted: 09/11/2022] [Indexed: 06/16/2023]
Abstract
The endangered Australian sea lion, Neophoca cinerea, faces ongoing population decline. Identification of key threats to N. cinerea population recovery, including disease and pollutants, is an objective of the species' recovery plan. Previous studies have identified Uncinaria sanguinis, an intestinal nematode, as a significant cause of disease and mortality in N. cinerea pups. Given the impact of heavy metals on the immune response, investigation of these pollutants is critical. To this end, the concentrations of arsenic (As), total mercury (Hg), cadmium (Cd), chromium (Cr), lead (Pb) and selenium (Se) were determined in blood collected from N. cinerea pups sampled during the 2017/18, 2019 and 2020/21 breeding seasons at Seal Bay Conservation Park, South Australia. Significant differences (p < 0.05) in Hg, As, Cr, and Se concentrations and molar ratio of Se:Hg were seen between breeding seasons. Pup age, maternal parity and inter-individual foraging behaviour were considered factors driving these differences. The concentrations of Hg (357, 198 and 241 µg/L) and As (225, 834 and 608 µg/L) were high in 2017/18, 2019 and 2020/21 respectively with Hg concentrations in the blood of N. cinerea pups above toxicological thresholds reported for marine mammals. The concentration of Se (1332, 647, 763 µg/L) and molar ratio of Se:Hg (9.47, 7.98 and 6.82) were low compared to other pinniped pups, indicating potential vulnerability of pups to the toxic effects of Hg. Significant (p < 0.05) negative associations for Pb and Cd with several red blood cell parameters suggest they could be exacerbating the anaemia caused by hookworm disease. Temporal (age-related) changes in element concentrations were also seen, such that pup age needs to be considered when interpreting bioaccumulation patterns. Further investigation of the role of elevated heavy metal concentrations on N. cinerea pup health, disease and development is recommended, particularly with respect to immunological impacts.
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Affiliation(s)
- Shannon Taylor
- Sydney School of Veterinary Science, Faculty of Science, The University of Sydney, Camperdown, NSW 2006, Australia
| | | | - Robert McQuilty
- Department of Chemical Pathology, Royal Prince Alfred Hospital, Camperdown, Sydney 2050, Australia
| | - David Lee
- Department of Chemical Pathology, Royal Prince Alfred Hospital, Camperdown, Sydney 2050, Australia
| | - Aileen Wing-Simpson
- Department of Chemical Pathology, Royal Prince Alfred Hospital, Camperdown, Sydney 2050, Australia
| | - Rachael Gray
- Sydney School of Veterinary Science, Faculty of Science, The University of Sydney, Camperdown, NSW 2006, Australia.
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Dietary Selenomethionine Reduce Mercury Tissue Levels and Modulate Methylmercury Induced Proteomic and Transcriptomic Alterations in Hippocampi of Adolescent BALB/c Mice. Int J Mol Sci 2022; 23:ijms232012242. [PMID: 36293098 PMCID: PMC9603801 DOI: 10.3390/ijms232012242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 10/06/2022] [Accepted: 10/11/2022] [Indexed: 12/02/2022] Open
Abstract
Methylmercury (MeHg) is a well-known environmental contaminant, particularly harmful to the developing brain. The main human dietary exposure to MeHg occurs through seafood consumption. However, seafood also contains several nutrients, including selenium, which has been shown to interact with MeHg and potentially ameliorate its toxicity. The aim of this study was to investigate the combined effects of selenium (as selenomethionine; SeMet) and MeHg on mercury accumulation in tissues and the effects concomitant dietary exposure of these compounds exert on the hippocampal proteome and transcriptome in mice. Adolescent male BALB/c mice were exposed to SeMet and two different doses of MeHg through their diet for 11 weeks. Organs, including the brain, were sampled for mercury analyses. Hippocampi were collected and analyzed using proteomics and transcriptomics followed by multi-omics bioinformatics data analysis. The dietary presence of SeMet reduced the amount of mercury in several organs, including the brain. Proteomic and RNA-seq analyses showed that both protein and RNA expression patterns were inversely regulated in mice receiving SeMet together with MeHg compared to MeHg alone. Several pathways, proteins and RNA transcripts involved in conditions such as immune responses and inflammation, oxidative stress, cell plasticity and Alzheimer’s disease were affected inversely by SeMet and MeHg, indicating that SeMet can ameliorate several toxic effects of MeHg in mice.
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Harb Rabia S, Luzardo OP, Pozo R, Abbassy M, Zumbado M, Elalfy I, Robaina L, Ginés R. Determination of heavy metals from Aloe vera by- product in golden mullet (Liza aurata); A consumer health risk assessment. Food Chem Toxicol 2022; 169:113418. [PMID: 36108983 DOI: 10.1016/j.fct.2022.113418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 08/31/2022] [Accepted: 09/06/2022] [Indexed: 10/31/2022]
Abstract
Heavy metals have become subject of concern in the recent years because of its potency to cause cardiovascular diseases and other toxic health effects. Therefore, this research was assumed to investigate the level of toxicity in terms of heavy metals accumulation in the fish samples and its benefits and risk for human consumers health and also evaluate the partial replacement of plant sources by canarian Aloe vera diets as a pure product or like a by-product on toxicological effects on the golden mullet (Liza aurata) fillet and whole body. In this study risks arising from fish metal content has been measured using various parameters as Estimated Daily Intake (EDI), Maximum Safe Consumption (MSCA), Target Hazard quotient (THQ), Hazard Index (HI) Carcinogenic risk of As (As- CR), the Value Selenium Health Benefit (Se HBV) and also the Nutritional Values has been evaluated. The results showed that all heavy metal levels in the fish tissue and diets were below the confirmed safe limits for consumption. In case of diets, it is obvious that with the exception of As, Hg, and Se, the presence of heavy or essential metals in both whole fish and raw fillet in golden grey mullet given experimental diets revealed that the whole fish had the highest concentration. Thus, it can be concluded that Aloe vera product and byproduct were in safety limits for fish and also for humans through food chain. Various risk and benefit assessment measures established by national and international authorities concluded that Liza aurata use was mostly safe.
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Affiliation(s)
- Selwan Harb Rabia
- Grupo de Investigación en Acuicultura (GIA), Parque Científico Tecnológico Marino de Taliarte, Universidad de Las Palmas de Gran Canaria (ULPGC), Spain; Damanhour University, Damanhour, Behera, Egypt.
| | - Octavio P Luzardo
- Toxicology Unit, Research Institute of Biomedical and Health Sciences (IUIBS), Universidad de Las Palmas de Gran Canaria (ULPGC), Spain; Spanish Biomedical Research Center in Physiopathology of Obesity and Nutrition (CIBERObn), Madrid, Spain
| | - Raquel Pozo
- Grupo de Investigación en Acuicultura (GIA), Parque Científico Tecnológico Marino de Taliarte, Universidad de Las Palmas de Gran Canaria (ULPGC), Spain
| | | | - Manuel Zumbado
- Toxicology Unit, Research Institute of Biomedical and Health Sciences (IUIBS), Universidad de Las Palmas de Gran Canaria (ULPGC), Spain; Spanish Biomedical Research Center in Physiopathology of Obesity and Nutrition (CIBERObn), Madrid, Spain
| | | | - Lidia Robaina
- Grupo de Investigación en Acuicultura (GIA), Parque Científico Tecnológico Marino de Taliarte, Universidad de Las Palmas de Gran Canaria (ULPGC), Spain
| | - Rafael Ginés
- Grupo de Investigación en Acuicultura (GIA), Parque Científico Tecnológico Marino de Taliarte, Universidad de Las Palmas de Gran Canaria (ULPGC), Spain
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11
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Herrmann SJ, Nimmo DWR, Herrmann-Hoesing LM. Field-Based Selenium Partitioning Coefficients and Trophic Transfer Factors for Cutthroat Trout Fisheries from Four Montane Lakes, Colorado, USA. WEST N AM NATURALIST 2022. [DOI: 10.3398/064.082.0207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- Scott J. Herrmann
- Department of Biology, Colorado State University Pueblo, 2200 Bonforte Boulevard, Pueblo, CO 81001
| | - Del Wayne R. Nimmo
- Department of Biology, Colorado State University Pueblo, 2200 Bonforte Boulevard, Pueblo, CO 81001
| | - Lynn M. Herrmann-Hoesing
- Department of Biology, Colorado State University Pueblo, 2200 Bonforte Boulevard, Pueblo, CO 81001
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12
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Herrmann SJ, Nimmo DWR, Melnykov IV. Trace Elements in Walleye Tissues and Dietary Components from an Impoundment Located Downstream of the Leadville Mining District, Colorado, I: Hg and Se. WEST N AM NATURALIST 2022. [DOI: 10.3398/064.082.0209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- Scott J. Herrmann
- Department of Biology, Colorado State University Pueblo, 2200 Bonforte Boulevard, Pueblo, CO 81001
| | - Del Wayne R. Nimmo
- Department of Biology, Colorado State University Pueblo, 2200 Bonforte Boulevard, Pueblo, CO 81001
| | - Igor V. Melnykov
- Department of Mathematics and Statistics, University of Minnesota Duluth, 1117 University Drive, Duluth, MN 55812
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13
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Zou C, Yin D, Wang R. Mercury and selenium bioaccumulation in wild commercial fish in the coastal East China Sea: Selenium benefits versus mercury risks. MARINE POLLUTION BULLETIN 2022; 180:113754. [PMID: 35605374 DOI: 10.1016/j.marpolbul.2022.113754] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2022] [Revised: 05/04/2022] [Accepted: 05/12/2022] [Indexed: 06/15/2023]
Abstract
This study investigated the contents of total mercury (THg), methylmercury (MeHg) and selenium (Se) in 22 fish species and 10 invertebrate species from the coastal East China Sea. The THg and MeHg contents were significantly higher in benthic fishes. Both Hg and Se biomagnified in the food webs, with evidences of associations during trophic transfer. In addition, Se:Hg molar ratio and Se health benefit value (HBVSe) were used as novel criteria for Hg exposure risk assessments, showing that Se presented in molar excess of Hg in all samples, which would negate the risks of Hg toxicity. HBVSe provided more informative results than Se:Hg molar ratio, pointing to possibly lower health risks for some fishes containing high levels of Hg and Se. Although the HBVSe results challenge the traditional Hg health risk assessment, its future application still requires worldwide comprehensive investigations.
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Affiliation(s)
- Chenxi Zou
- Key Laboratory of Yangtze River Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China
| | - Daqiang Yin
- Key Laboratory of Yangtze River Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China
| | - Rui Wang
- Key Laboratory of Yangtze River Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China.
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14
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Jiang X, Zhao Y, Tang C, Appelbaum M, Rao Q. Aquatic food animals in the United States: Status quo and challenges. Compr Rev Food Sci Food Saf 2022; 21:1336-1382. [PMID: 35150203 DOI: 10.1111/1541-4337.12923] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 01/03/2022] [Accepted: 01/06/2022] [Indexed: 12/29/2022]
Abstract
This review summarizes (1) the U.S. status quo for aquatic food animal production and marketing; (2) major food safety and quality issues/concerns for aquatic food animals in the United States, including fish misbranding, finfish/shellfish allergies, pathogens, toxins and harmful residues, microplastics, and genetically engineered salmon; and (3) various U.S. regulations, guidances, and detection methods for the surveillance of fishery products. Overall, fish misbranding is the biggest challenge in the United States due to the relatively low inspection rate. In addition, due to the regulatory differences among countries, illegal animal drugs and/or pesticide residues might also be identified in imported aquatic food animals. Future regulatory and research directions could focus on further strengthening international cooperation, enhancing aquatic food animal inspection, and developing reliable, sensitive, and highly efficient detection methods.
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Affiliation(s)
- Xingyi Jiang
- Department of Nutrition and Integrative Physiology, Florida State University, Tallahassee, Florida, USA
| | - Yaqi Zhao
- Department of Nutrition and Integrative Physiology, Florida State University, Tallahassee, Florida, USA
| | - Chunya Tang
- Department of Nutrition and Integrative Physiology, Florida State University, Tallahassee, Florida, USA
| | - Megan Appelbaum
- Department of Nutrition and Integrative Physiology, Florida State University, Tallahassee, Florida, USA
| | - Qinchun Rao
- Department of Nutrition and Integrative Physiology, Florida State University, Tallahassee, Florida, USA
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15
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Xie J, Tao L, Wu Q, Li T, Yang C, Lin T, Liu B, Li G, Chen D. Mercury and selenium in squids from the Pacific Ocean and Indian Ocean: The distribution and human health implications. MARINE POLLUTION BULLETIN 2021; 173:112926. [PMID: 34536705 DOI: 10.1016/j.marpolbul.2021.112926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Revised: 08/27/2021] [Accepted: 08/30/2021] [Indexed: 06/13/2023]
Abstract
Squids are globally distributed. Hg-contaminated squids may have high risks on humans. With abundant Se (antagonistic effect on Hg), the risks can be reduced. We collected squids around the world (Northwest Pacific Ocean, Southeast Pacific Ocean and Indian Ocean). Concentrations of Hg and Se were region-based and tissue-based. The higher content of Se were, the lower relative Hg levels were. The correlation between Se:Hg and Se was the strongest in the digestive gland. The values of Se:Hg and THQ all confirm that the health risk was lower in samples with higher concentrations of Se. Despite the risk assessment by Se:Hg, BRV and THQ analysis showed no risk when consumed in moderation, the maximum daily intake is provided based on Monte Carlo simulation. In future, when evaluating the risks cause by Hg exposure and providing the recommended daily amount, it may need to concurrent consideration of Se levels.
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Affiliation(s)
- Jingqian Xie
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China; Skate Key Laboratory of Organic Geochemistry, Guangdong Key Laboratory of Environment and Resources, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Ling Tao
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China
| | - Qiang Wu
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China
| | - Tiejun Li
- Zhejiang Marine Fisheries Research Institute, Key Laboratory of Sustainable Utilization of Technology Research for Fishery Resource of Zhejiang Province, Zhoushan, 316021, China
| | - Chenghu Yang
- Zhejiang Marine Fisheries Research Institute, Key Laboratory of Sustainable Utilization of Technology Research for Fishery Resource of Zhejiang Province, Zhoushan, 316021, China
| | - Tian Lin
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China
| | - Bilin Liu
- College of Marine Science, Shanghai Ocean University, Shanghai 201306, China; The Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, Shanghai 201306, China
| | - Gang Li
- College of Marine Science, Shanghai Ocean University, Shanghai 201306, China; The Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, Shanghai 201306, China.
| | - Duofu Chen
- College of Marine Science, Shanghai Ocean University, Shanghai 201306, China
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16
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Mutić J, Jovanović V, Jacxsens L, Tondeleir J, Ristivojević P, Djurdjić S, Rajković A, Veličković TĆ. Chemical Content of Five Molluscan Bivalve Species Collected from South Korea: Multivariate Study and Safety Evaluation. Foods 2021; 10:foods10112690. [PMID: 34828971 PMCID: PMC8623076 DOI: 10.3390/foods10112690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 10/26/2021] [Accepted: 10/26/2021] [Indexed: 11/16/2022] Open
Abstract
Bivalves are a good source of nutrients but also a potential source of environmental contaminants, which could pose a risk for consumers. The aims of this study were: the determination of 16 elements by ICP-MS in 48 samples of five bivalve species purchased from market in Korea; the identification of elements useful for species classification using multivariate analyses; and the benefit-risk evaluation associated to the consumption of these bivalves. The highest difference among content of elements between species was found for Cd, Mn, Ni, Zn, and Fe. Partial last squares discriminant analysis revealed elements with a VIP score >1 which were considered as the most relevant for explaining certain species. As, Cd, Co, and Ni were found as taxonomical markers of V. philippinarum; Mn, Zn, Mg, and Na of A. irradians; and Cd, Ni, and Fe of M. yessoensis. These species could serve as good dietary sources of essential elements. Cd exposure by consumption of Manila clams is not representing a health risk for the Korean population; however, through consumption of Yesso scallops, 5.3% of the Korean population has a potential health risk. Removal of the digestive gland before eating will drastically reduce the amount of Cd ingested.
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Affiliation(s)
- Jelena Mutić
- Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, 11000 Belgrade, Serbia; (J.M.); (V.J.); (P.R.); (S.D.)
- Department of Molecular Biotechnology, Environmental Technology and Food Technology, Ghent University Global Campus, Incheon 21985, Korea
| | - Vesna Jovanović
- Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, 11000 Belgrade, Serbia; (J.M.); (V.J.); (P.R.); (S.D.)
- Department of Molecular Biotechnology, Environmental Technology and Food Technology, Ghent University Global Campus, Incheon 21985, Korea
| | - Liesbeth Jacxsens
- Department of Food Technology, Safety and Health, Faculty of BioScience Engineering, Ghent University, B-9000 Ghent, Belgium; (L.J.); (J.T.); (A.R.)
| | - Jannes Tondeleir
- Department of Food Technology, Safety and Health, Faculty of BioScience Engineering, Ghent University, B-9000 Ghent, Belgium; (L.J.); (J.T.); (A.R.)
| | - Petar Ristivojević
- Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, 11000 Belgrade, Serbia; (J.M.); (V.J.); (P.R.); (S.D.)
- Department of Molecular Biotechnology, Environmental Technology and Food Technology, Ghent University Global Campus, Incheon 21985, Korea
| | - Sladjana Djurdjić
- Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, 11000 Belgrade, Serbia; (J.M.); (V.J.); (P.R.); (S.D.)
| | - Andreja Rajković
- Department of Food Technology, Safety and Health, Faculty of BioScience Engineering, Ghent University, B-9000 Ghent, Belgium; (L.J.); (J.T.); (A.R.)
| | - Tanja Ćirković Veličković
- Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, 11000 Belgrade, Serbia; (J.M.); (V.J.); (P.R.); (S.D.)
- Department of Molecular Biotechnology, Environmental Technology and Food Technology, Ghent University Global Campus, Incheon 21985, Korea
- Department of Food Technology, Safety and Health, Faculty of BioScience Engineering, Ghent University, B-9000 Ghent, Belgium; (L.J.); (J.T.); (A.R.)
- Department of Chemical and Biological Sciences, Serbian Academy of Sciences and Arts, 11000 Belgrade, Serbia
- Correspondence: ; Tel.: +82-32-626-4211; Fax: +82-32-626-4109
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17
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Maciel OLDC, Willmer IQ, Saint'Pierre TD, Machado W, Siciliano S, Hauser-Davis RA. Arsenic contamination in widely consumed Caribbean sharpnose sharks in southeastern Brazil: Baseline data and concerns regarding fisheries resources. MARINE POLLUTION BULLETIN 2021; 172:112905. [PMID: 34523430 DOI: 10.1016/j.marpolbul.2021.112905] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 08/16/2021] [Accepted: 08/22/2021] [Indexed: 06/13/2023]
Abstract
Although shark meat is consumed worldwide, elevated arsenic (As) concentrations have been increasingly reported. The Caribbean sharpnose shark (Rhizoprionodon porosus) is a widely consumed fishing resource in Brazil, with scarce information on As burdens to date. Herein, commercial-sized juvenile Caribbean sharpnose sharks from Rio de Janeiro (Brazil) were assessed in this regard, presenting significantly higher hepatic As concentrations in males (8.24 ± 1.20 mg kg-1 wet weight; n = 12) compared to females (6.59 ± 1.87 mg kg-1 w.w.; n = 8), and a positive correlation (r = 0.74) was noted between female muscle and liver As concentrations, indicating systemic inter-tissue transport not evidenced in males. Arsenic concentrations were over the maximum permissible As limit established in Brazilian legislation for seafood and calculated Target Hazard Quotients suggest consumption risks, although cancer risks were not evidenced. Therefore, Public Health concerns with regard to Caribbean sharpnose shark As burdens deserve careful attention.
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Affiliation(s)
- Oswaldo Luiz de C Maciel
- Fundação Instituto da Pesca do Estado do Rio de Janeiro (FIPERJ), 24030-020 Niterói, RJ, Brazil; Programa de Pós-Graduação em Geociências (Geoquímica), Universidade Federal Fluminense (UFF), 24020-141 Niterói, RJ, Brazil.
| | - Isabel Q Willmer
- Laboratório de Avaliação e Promoção da Saúde Ambiental, Instituto Oswaldo Cruz (Fiocruz), 21040-360 Rio de Janeiro, RJ, Brazil; Laboratório de Biologia e Tecnologia Pesqueira, Departamento de Biologia Marinha, Universidade do Rio de Janeiro (UFRJ), 21941-902 Rio de Janeiro, RJ, Brazil
| | - Tatiana D Saint'Pierre
- Departamento de Química, Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), 22453-900 Rio de Janeiro, RJ, Brazil
| | - Wilson Machado
- Programa de Pós-Graduação em Geociências (Geoquímica), Universidade Federal Fluminense (UFF), 24020-141 Niterói, RJ, Brazil; Laboratório de Geoquímica do Antropoceno, Departamento de Geoquímica, Universidade Federal Fluminense (UFF), 24020-141 Niterói, RJ, Brazil.
| | - Salvatore Siciliano
- Grupo de Estudos de Mamíferos Marinhos da Região dos Lagos (GEMM-Lagos), 28970-000 Araruama, RJ, Brazil; Fundação Oswaldo Cruz (Fiocruz), Av. Brasil, 4.365, Manguinhos, 21040-900 Rio de Janeiro, RJ, Brazil
| | - Rachel Ann Hauser-Davis
- Laboratório de Avaliação e Promoção da Saúde Ambiental, Instituto Oswaldo Cruz (Fiocruz), 21040-360 Rio de Janeiro, RJ, Brazil.
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18
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Gerson JR, Dorman R, Eagles-Smith C, Bernhardt ES, Walters D. Lethal impacts of selenium counterbalance the potential reduction in mercury bioaccumulation for freshwater organisms. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 287:117293. [PMID: 34030024 DOI: 10.1016/j.envpol.2021.117293] [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: 01/06/2021] [Revised: 04/27/2021] [Accepted: 04/29/2021] [Indexed: 06/12/2023]
Abstract
Mercury (Hg), a potent neurotoxic element, can biomagnify through food webs once converted into methylmercury (MeHg). Some studies have found that selenium (Se) exposure may reduce MeHg bioaccumulation and toxicity, though this pattern is not universal. Se itself can also be toxic at elevated levels. We experimentally manipulated the relative concentrations of dietary MeHg and Se (as selenomethionine [SeMet]) for an aquatic grazer (the mayfly, Neocloeon triangulifer) and its food source (diatoms). Under low MeHg treatment (0.2 ng/L), diatoms exhibited a quadratic pattern, with decreasing diatom MeHg concentration up to 2.0 μg Se/L and increasing MeHg accumulation at higher SeMet concentrations. Under high MeHg treatment (2 ng/L), SeMet concentrations had no effect on diatom MeHg concentrations. Mayfly MeHg concentrations and biomagnification factors (concentration of MeHg in mayflies: concentration of MeHg in diatoms) declined with SeMet addition only in the high MeHg treatment. Mayfly MeHg biomagnification factors decreased from 5.3 to 3.3 in the high MeHg treatment, while the biomagnification factor was constant with an average of 4.9 in the low MeHg treatment. The benefit of reduced MeHg biomagnification was offset by non-lethal effects and high mortality associated with 'protective' levels of SeMet exposure. Mayfly larvae escape behavior (i.e., startle response) was greatly reduced at early exposure days. Larvae took nearly twice as long to metamorphose to adults at high Se concentrations. The minimum number of days to mayfly emergence did not differ by SeMet exposure, with an average of 13 days. We measured an LC50SeMet for mayflies of 3.9 μg Se/L, with complete mortality at concentrations ≥6.0 μg Se/L. High reproductive mortality occurred at elevated SeMet exposures, with only 0-18% emergence at ≥4.12 μg Se/L. Collectively, our results suggest that while there is some evidence that Se can reduce MeHg accumulation at the base of the food web at specific exposure levels of SeMet and MeHg, Se is also toxic to mayflies and could lead to negative effects that extend across ecosystem boundaries.
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Affiliation(s)
| | - Rebecca Dorman
- U.S. Geological Survey, Columbia Environmental Research Center, Columbia, MO, 65201, USA
| | - Collin Eagles-Smith
- U.S. Geological Survey, Forest and Rangeland Ecosystem Science Center, Corvallis, OR, 97330, USA
| | | | - David Walters
- U.S. Geological Survey, Columbia Environmental Research Center, Columbia, MO, 65201, USA
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19
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Smalling KL, Oja EB, Cleveland DM, Davenport JM, Eagles-Smith C, Campbell Grant EH, Kleeman PM, Halstead BJ, Stemp KM, Tornabene BJ, Bunnell ZJ, Hossack BR. Metal accumulation varies with life history, size, and development of larval amphibians. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 287:117638. [PMID: 34426379 DOI: 10.1016/j.envpol.2021.117638] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Revised: 06/15/2021] [Accepted: 06/20/2021] [Indexed: 06/13/2023]
Abstract
Amphibian larvae are commonly used as indicators of aquatic ecosystem health because they are susceptible to contaminants. However, there is limited information on how species characteristics and trophic position influence contaminant loads in larval amphibians. Importantly, there remains a need to understand whether grazers (frogs and toads [anurans]) and predators (salamanders) provide comparable information on contaminant accumulation or if they are each indicative of unique environmental processes and risks. To better understand the role of trophic position in contaminant accumulation, we analyzed composite tissues for 10 metals from larvae of multiple co-occurring anuran and salamander species from 20 wetlands across the United States. We examined how metal concentrations varied with body size (anurans and salamanders) and developmental stage (anurans) and how the digestive tract (gut) influenced observed metal concentrations. Across all wetlands, metal concentrations were greater in anurans than salamanders for all metals tested except mercury (Hg), selenium (Se), and zinc (Zn). Concentrations of individual metals in anurans decreased with increasing weight and developmental stage. In salamanders, metal concentrations were less correlated with weight, indicating diet played a role in contaminant accumulation. Based on batches of similarly sized whole-body larvae compared to larvae with their digestive tracts removed, our results indicated that tissue type strongly affected perceived concentrations, especially for anurans (gut represented an estimated 46-97% of all metals except Se and Zn). This suggests the reliability of results based on whole-body sampling could be biased by metal, larval size, and development. Overall, our data shows that metal concentrations differs between anurans and salamanders, which suggests that metal accumulation is unique to feeding behavior and potentially trophic position. To truly characterize exposure risk in wetlands, species of different life histories, sizes and developmental stages should be included in biomonitoring efforts.
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Affiliation(s)
- Kelly L Smalling
- US Geological Survey, New Jersey Water Science Center, Lawrenceville, NJ, 08648, USA.
| | - Emily B Oja
- US Geological Survey, Northern Rocky Mountain Science Center, Missoula, MT, 59812, USA
| | - Danielle M Cleveland
- US Geological Survey, Columbia Environmental Research Center, Columbia, MO, 65201, USA
| | - Jon M Davenport
- Department of Biology, Appalachian State University, Boone, NC, 28608, USA
| | - Collin Eagles-Smith
- US Geological Survey, Forest and Rangeland Ecosystem Science Center, Corvallis, OR, 97331, USA
| | - Evan H Campbell Grant
- U.S. Geological Survey, Eastern Ecological Science Center, S.O. Conte Anadromous Fish Research Laboratory, Turner Falls, MA, 01376, USA
| | - Patrick M Kleeman
- US Geological Survey, Western Ecological Research Center, Point Reyes Field Station, Point Reyes Station, CA, 94956, USA
| | - Brian J Halstead
- US Geological Survey, Western Ecological Research Center, Dixon Field Station, Dixon, CA, 95620, USA
| | - Kenzi M Stemp
- Department of Biology, Appalachian State University, Boone, NC, 28608, USA
| | - Brian J Tornabene
- Wildlife Biology Program, W.A. Franke College of Forestry & Conservation, University of Montana, Missoula, MT, 59812, USA
| | - Zachary J Bunnell
- US Geological Survey, New Jersey Water Science Center, Lawrenceville, NJ, 08648, USA
| | - Blake R Hossack
- US Geological Survey, Northern Rocky Mountain Science Center, Missoula, MT, 59812, USA; Wildlife Biology Program, W.A. Franke College of Forestry & Conservation, University of Montana, Missoula, MT, 59812, USA
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20
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Burger J, Gochfeld M. Biomonitoring selenium, mercury, and selenium:mercury molar ratios in selected species in Northeastern US estuaries: risk to biota and humans. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:18392-18406. [PMID: 33471308 PMCID: PMC9624179 DOI: 10.1007/s11356-020-12175-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Accepted: 12/21/2020] [Indexed: 05/09/2023]
Abstract
The mutual mitigation of selenium and mercury toxicity is particularly interesting, especially for humans. Mercury is widely recognized as a pantoxic element; all forms are toxic to all organisms. Less well known is that selenium in excess is toxic as well. The high affinity between these elements influences their bioavailability and toxicity. In this paper, we use selected species from Barnegat and Delaware Bays in New Jersey to examine variations in levels of selenium and mercury, and selenium:mercury molar ratios between and within species. We report on species ranging from horseshoe crab eggs (Limulus polyphemus), a keystone species of the food chain, to several fish species, to fish-eating birds. Sampling began in the 1970s for some species and in the 1990s for others. We found no clear time trends in mercury levels in horseshoe crab eggs, but selenium levels declined at first, then remained steady after the mid1990s. Concentrations of mercury and selenium in blood of migrant shorebirds directly reflected levels in horseshoe crab eggs (their food at stopover). Levels of mercury in eggs of common terns (Sterna hirundo) varied over time, and may have declined slightly since the mid2000s; selenium levels also varied temporally, and declined somewhat. There were variations in mercury and selenium levels in commercial, recreational, and subsistence fish as a function of species, season, and size (a surrogate for age). Selenium:mercury molar ratios also varied as a function of species, year, season, and size in fish. While mercury levels increased with size within individual fish species, selenium levels remained the same or declined. Thus selenium:mercury molar ratios declined with size in fish, reducing the potential of selenium to ameliorate mercury toxicity in consumers. Mercury levels in fish examined were higher in early summer and late fall, and lower in the summer, while selenium stayed relatively similar; thus selenium:mercury molar ratios were lower in early summer and late fall than in midsummer. We discuss the importance of temporal trends in biomonitoring projects, variations in levels of mercury, selenium, and the molar ratios as a function of several variables, and the influence of these on risks to predators and humans eating the fish, and the eggs of gulls, terns. Our data suggests that variability limits the utility of the selenium:mercury molar ratio for fish consumption advisories and for risk management.
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Affiliation(s)
- Joanna Burger
- Division of Life Science, Rutgers University, 604 Allison Road, Piscataway, NJ, 08854, USA.
- Environmental and Occupational Health Sciences Institute, Rutgers University, Piscataway, NJ, 08854, USA.
| | - Michael Gochfeld
- Environmental and Occupational Health Sciences Institute, Rutgers University, Piscataway, NJ, 08854, USA
- Rutgers Biomedical and Health Sciences, Piscataway, NJ, 08854, USA
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21
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Barone G, Storelli A, Meleleo D, Dambrosio A, Garofalo R, Busco A, Storelli MM. Levels of Mercury, Methylmercury and Selenium in Fish: Insights into Children Food Safety. TOXICS 2021; 9:39. [PMID: 33672494 PMCID: PMC7923435 DOI: 10.3390/toxics9020039] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 02/14/2021] [Accepted: 02/18/2021] [Indexed: 02/08/2023]
Abstract
Total mercury (THg), methylmercury (MeHg), and selenium (Se) concentrations were measured in various commercially important fish species. The benefit-risk binomial associated with these chemicals was assessed in children through the probability of exceeding the provisional tolerable weekly intakes (PTWIs) of the contaminants and the Se recommended dietary allowance (RDA). The Se:Hg molar ratios, selenium health benefit values (HBVSe), and monthly consumption rate limits (CRmm) for each species were also calculated. THg and Se were analyzed by atomic absorption spectrophotometer (Shimadzu, Milan, Italy), while MeHg was determined by Trace Ultra gas chromatograph connected with a PolarisQ MS (Thermo Fisher Scientific, Waltham, MA, USA). None of the analyzed fish had Hg levels above the European Community regulatory limits, while most large predators had MeHg levels over the threshold concentration set by US EPA. The estimated weekly intakes of THg and MeHg exceeded in many cases the PTWIs and the Se estimated daily intakes were provided from 0.71% to 2.75% of the RDA. Se:Hg molar ratios above 1 and positive HBVSe index suggested that Se in fish could be enough to alleviate the potential toxic effect of Hg. However, high-risk groups as children should consume fish in moderation because a large consumption pattern, especially of swordfish and tunas, might be of concern for health.
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Affiliation(s)
- Grazia Barone
- Biosciences, Biotechnlogies and Biopharmaceutical Department, University of Bari “Aldo Moro”, 70010 Valenzano, Bari, Italy; (G.B.); (A.S.); (D.M.); (R.G.); (A.B.)
| | - Arianna Storelli
- Biosciences, Biotechnlogies and Biopharmaceutical Department, University of Bari “Aldo Moro”, 70010 Valenzano, Bari, Italy; (G.B.); (A.S.); (D.M.); (R.G.); (A.B.)
| | - Daniela Meleleo
- Biosciences, Biotechnlogies and Biopharmaceutical Department, University of Bari “Aldo Moro”, 70010 Valenzano, Bari, Italy; (G.B.); (A.S.); (D.M.); (R.G.); (A.B.)
| | - Angela Dambrosio
- Department of Emergency and Organ Transplant, University of Bari “Aldo Moro”, 70010 Valenzano, Bari, Italy;
| | - Rita Garofalo
- Biosciences, Biotechnlogies and Biopharmaceutical Department, University of Bari “Aldo Moro”, 70010 Valenzano, Bari, Italy; (G.B.); (A.S.); (D.M.); (R.G.); (A.B.)
| | - Antonio Busco
- Biosciences, Biotechnlogies and Biopharmaceutical Department, University of Bari “Aldo Moro”, 70010 Valenzano, Bari, Italy; (G.B.); (A.S.); (D.M.); (R.G.); (A.B.)
| | - Maria Maddalena Storelli
- Biosciences, Biotechnlogies and Biopharmaceutical Department, University of Bari “Aldo Moro”, 70010 Valenzano, Bari, Italy; (G.B.); (A.S.); (D.M.); (R.G.); (A.B.)
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22
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Manceau A, Gaillot AC, Glatzel P, Cherel Y, Bustamante P. In Vivo Formation of HgSe Nanoparticles and Hg-Tetraselenolate Complex from Methylmercury in Seabirds-Implications for the Hg-Se Antagonism. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:1515-1526. [PMID: 33476140 DOI: 10.1021/acs.est.0c06269] [Citation(s) in RCA: 69] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
In vivo and in vitro evidence for detoxification of methylmercury (MeHg) as insoluble mercury selenide (HgSe) underlies the central paradigm that mercury exposure is not or little hazardous when tissue Se is in molar excess (Se:Hg > 1). However, this hypothesis overlooks the binding of Hg to selenoproteins, which lowers the amount of bioavailable Se that acts as a detoxification reservoir for MeHg, thereby underestimating the toxicity of mercury. This question was addressed by determining the chemical forms of Hg in various tissues of giant petrels Macronectes spp. using a combination of high energy-resolution X-ray absorption near edge structure and extended X-ray absorption fine structure spectroscopy, and transmission electron microscopy coupled to elemental mapping. Three main Hg species were identified, a MeHg-cysteinate complex, a four-coordinate selenocysteinate complex (Hg(Sec)4), and a HgSe precipitate, together with a minor dicysteinate complex Hg(Cys)2. The amount of HgSe decreases in the order liver > kidneys > brain = muscle, and the amount of Hg(Sec)4 in the order muscle > kidneys > brain > liver. On the basis of biochemical considerations and structural modeling, we hypothesize that Hg(Sec)4 is bound to the carboxy-terminus domain of selenoprotein P (SelP) which contains 12 Sec residues. Structural flexibility allows SelP to form multinuclear Hgx(Se,Sec)y complexes, which can be biomineralized to HgSe by protein self-assembly. Because Hg(Sec)4 has a Se:Hg molar ratio of 4:1, this species severely depletes the stock of bioavailable Se for selenoprotein synthesis and activity to one μg Se/g dry wet in the muscle of several birds. This concentration is still relatively high because selenium is naturally abundant in seawater, therefore it probably does not fall below the metabolic need for essential selenium. However, this study shows that this may not be the case for terrestrial animals, and that muscle may be the first tissue potentially injured by Hg toxicity.
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Affiliation(s)
- Alain Manceau
- Université Grenoble Alpes, CNRS, ISTerre, 38000 Grenoble, France
| | - Anne-Claire Gaillot
- Université Nantes, CNRS, Institut des Matériaux Jean Rouxel, IMN, 44000 Nantes, France
| | - Pieter Glatzel
- European Synchrotron Radiation Facility (ESRF), 71 Rue des Martyrs, 38000 Grenoble, France
| | - Yves Cherel
- Centre d'Etudes Biologiques de Chizé (CEBC), CNRS-La Rochelle Université, 79360 Villiers-en-Bois, France
| | - Paco Bustamante
- La Rochelle Université, CNRS, Littoral Environnement et Sociétés (LIENSs), 17000, La Rochelle, France
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23
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Nong Q, Dong H, Liu Y, Liu L, He B, Huang Y, Jiang J, Luan T, Chen B, Hu L. Characterization of the mercury-binding proteins in tuna and salmon sashimi: Implications for health risk of mercury in food. CHEMOSPHERE 2021; 263:128110. [PMID: 33297103 DOI: 10.1016/j.chemosphere.2020.128110] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 08/12/2020] [Accepted: 08/21/2020] [Indexed: 06/12/2023]
Abstract
Fish consumption is one of the major ways through which humans receive exposure to mercury (Hg). The existing forms of Hg in food, particularly Hg bound to proteins, may affect the absorption of Hg by humans and subsequently its potentially toxic effects. However, the knowledge regarding Hg-binding proteins in edible fish muscle is scarce. In the present study, salmon and tuna fish muscles, collected from seven different regions and countries, were analyzed using metallomics- and proteomics-based techniques. The concentration of Hg in sashimi samples ranged from 4.4 to 317.4 ng/g. Size exclusion chromatography (SEC) coupled with inductively coupled plasma mass spectrometer (ICP-MS) showed that beta-actin was a novel Hg-binding protein from the fish muscles, and this protein could also bind bismuth (Bi), silver (Ag), and copper (Cu). Hg bound to beta-actin accounted for approximately 30.2-37.6% of the total Hg in the tuna muscles and was significantly correlated to total Hg in the fish muscles (r = 0.98, p < 0.01) and in the fraction of soluble proteins (r = 0.94, p < 0.01). These findings suggest that proteins act as the main Hg accumulation sites in edible fish; thus, increasing human exposure to Hg following gastrointestinal digestion.
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Affiliation(s)
- Qiying Nong
- School of Life Sciences, Sun Yat-Sen University, Guangzhou, 510275, China; State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.
| | - Hongzhe Dong
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Yingqiu Liu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Lihong Liu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Bin He
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Yongshun Huang
- Guangdong Provincial Hospital for Occupational Diseases Prevention and Treatment, Guangzhou, 510300, China
| | - Jie Jiang
- Shenzhen Center for Disease Control and Prevention, Shenzhen, 518055, China
| | - Tiangang Luan
- School of Life Sciences, Sun Yat-Sen University, Guangzhou, 510275, China
| | - Baowei Chen
- Southern Marine Science and Engineering Guangdong Laboratory, School of Marine Sciences, Sun Yat-Sen University, Zhuhai, 519082, China.
| | - Ligang Hu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; Institute of Environment and Health, Jianghan University, Wuhan, 430056, China; School of Environment, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310000, China
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24
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Canova L, Sturini M, Profumo A, Maraschi F. Evidence of Low-Habitat Contamination Using Feathers of Three Heron Species as a Biomonitor of Inorganic Elemental Pollution. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:E7776. [PMID: 33114248 PMCID: PMC7660610 DOI: 10.3390/ijerph17217776] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 10/19/2020] [Accepted: 10/21/2020] [Indexed: 12/14/2022]
Abstract
The concentration of 12 elements (As, Cd, Co, Cr, Cu, Fe, Hg, Mn, Ni, Pb, Se, and Zn) has been investigated in the feathers of three species of Ardeidae, namely the Grey Heron Ardea cinerea, the Little Egret Egretta garzetta, and the Cattle Egret Bubulcus ibis, all breeding at a colony located in the southern Padana Plain (NW Italy). This study is a first step for an evaluation of possible direct effects of these elements on chicks' survival and growth rate. Fe, Zn, Cu, and Mn were in the range 7-69 mg Kg-1, while lower levels of Pb, Ni, As, and Se (0.27-1.45 mg Kg-1) were measured. Co, Cd, and Cr were close to the method detection limits (MDLs) in all the species. The measured concentrations of the most abundant trace elements, such as Zn and Cu, seem to reflect the geochemical pattern of the background (running water and soil), while Hg concentration is lower and it appears to be biomagnified, particularly in Grey Heron feathers. Its concentration is higher in adults than in chicks, and it differs among the three species, as it is closely related to the fish-based dietary pattern. The measured trace elements' concentrations are below the threshold levels in all the heron species, and consequently, harmful and acute effects on the local population are unlikely; the conservation status of herons populations in northern Italy is probably more affected by other factors, such as climate changes, altered aquatic environment, and, consequently, food quality.
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Affiliation(s)
- Luca Canova
- Department of Chemistry, University of Pavia, I-27100 Pavia, Italy; (M.S.); (A.P.); (F.M.)
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25
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Albuquerque FEA, Minervino AHH, Miranda M, Herrero-Latorre C, Barrêto Júnior RA, Oliveira FLC, Sucupira MCA, Ortolani EL, López-Alonso M. Toxic and essential trace element concentrations in fish species in the Lower Amazon, Brazil. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 732:138983. [PMID: 32417551 DOI: 10.1016/j.scitotenv.2020.138983] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 04/22/2020] [Accepted: 04/23/2020] [Indexed: 06/11/2023]
Abstract
The Lower Amazon region (Western Pará, northern Brazil) is greatly affected by mining exploitations (particularly artisanal gold mines) and other industrial and intensive agricultural activities with potentially strong impacts on aquatic ecosystems. Although such impacts include contamination with various toxic elements, to date only the effects of Hg have been considered. In this study, toxic and trace element concentrations were determined in the flesh of 351 fish specimens, including detritivores (Acarí, Pterygoplichthys pardalis), omnivores (Piranha, Pygocentrus nattereri; Pirarucu, Arapaima sp.) and carnivores (Caparari, Pseudoplatystoma fasciatum; Tucunaré, Cichla ocellaris), during the dry and wet seasons in 2015 and 2016. The range of concentrations of toxic element residues were 2-238 μg/kg fresh weight for As, 1-77 μg/kg for Cd, 4-1922 μg/kg for Hg and 1-30 μg/kg for Pb. Only the maximum concentrations of Hg established in the Brazilian legislation for fish destined for human consumption (0.5 mg/kg) were exceeded (in 16% of carnivorous species). The large between-species and seasonal differences observed for all these toxic elements are probably related to the seasonal behaviour and dietary habits of the different fish species. By contrast, essential trace element concentrations were low and not related to seasonal or dietary factors, and the observed differences may be at least partly related to the metabolism of each species. The associations between Hg and the essential trace elements Se, Fe, Co and Mn deserve special attention, as these trace elements may play a role in Hg cycling and methylation and merit further evaluation with the aim of reducing Hg toxicity in aquatic environments.
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Affiliation(s)
- Fabio Edir Amaral Albuquerque
- Laboratory of Animal Health (LARSANA), Federal University of Western Pará (UFOPA), Rua Vera Paz, s/n, Salé, CEP 68040-255 Santarém, PA, Brazil; Department of Animal Pathology, Veterinary Faculty, Universidade de Santiago de Compostela, 27002 Lugo, Spain
| | - Antonio Humberto Hamad Minervino
- Laboratory of Animal Health (LARSANA), Federal University of Western Pará (UFOPA), Rua Vera Paz, s/n, Salé, CEP 68040-255 Santarém, PA, Brazil.
| | - Marta Miranda
- Department of Anatomy, Animal Production and Clinical Veterinary Sciences, Veterinary Faculty, Universidade de Santiago de Compostela, 27002 Lugo, Spain
| | - Carlos Herrero-Latorre
- Instituto de Investigación e Análises Alimentarias (IIAA), Departamento de Química Analítica, Nutrición e Bromatoloxía, Facultade de Ciencias, Universidade de Santiago de Compostela, 27002 Lugo, Spain
| | - Raimundo Alves Barrêto Júnior
- Department of Animal Science, Federal Rural University of the Semiarid Region (UFERSA), Av. Francisco Mota, s/n° - Bairro Pres. Costa e Silva, CEP 59625-900 Mossoró, RN, Brazil
| | - Francisco Leonardo Costa Oliveira
- Department of Clinical Science, College of Veterinary Medicine and Animal Science, University of Sao Paulo (FMVZ/USP). Av. Prof. Orlando Marques de Paiva, 87, Cidade Universitária, CEP, 05508-270, São Paulo, SP, Brazil
| | - Maria Claudia Araripe Sucupira
- Department of Clinical Science, College of Veterinary Medicine and Animal Science, University of Sao Paulo (FMVZ/USP). Av. Prof. Orlando Marques de Paiva, 87, Cidade Universitária, CEP, 05508-270, São Paulo, SP, Brazil
| | - Enrico Lippi Ortolani
- Department of Clinical Science, College of Veterinary Medicine and Animal Science, University of Sao Paulo (FMVZ/USP). Av. Prof. Orlando Marques de Paiva, 87, Cidade Universitária, CEP, 05508-270, São Paulo, SP, Brazil
| | - Marta López-Alonso
- Department of Animal Pathology, Veterinary Faculty, Universidade de Santiago de Compostela, 27002 Lugo, Spain
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26
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Gerson JR, Walters DM, Eagles-Smith CA, Bernhardt ES, Brandt JE. Do Two Wrongs Make a Right? Persistent Uncertainties Regarding Environmental Selenium-Mercury Interactions. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:9228-9234. [PMID: 32633495 DOI: 10.1021/acs.est.0c01894] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Mercury (Hg) is a pervasive environmental pollutant and contaminant of concern for both people and wildlife that has been a focus of environmental remediation efforts for decades. A growing body of literature has motivated calls for revising Hg consumption advisories to co-consider selenium (Se) levels in seafood and implies that remediating aquatic ecosystems with ecosystem-scale Se additions could be a robust solution to Hg contamination. Provided that elevated Se concentrations are also known toxicological threats to aquatic animals, we performed a literature search to evaluate the strength of evidence supporting three assertions underpinning the ameliorating benefits of Se: (1) dietary Se reduces MeHg toxicity in consumers; (2) environmental Se reduces Hg bioaccumulation and biomagnification in aquatic food webs; and (3) Se inhibits Hg bioavailability to, and/or methylmercury production by, microbial communities. Limited or ambiguous support for each criterion indicates that many scientific uncertainties and gaps remain regarding Se mediation of Hg behavior and toxicity in abiotic and biotic compartments. Significantly more information is needed to provide a strong scientific basis for modifying current fish consumption advisories on the basis of Se:Hg ratios or for applying Se amendments to remediate Hg-contaminated ecosystems.
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Affiliation(s)
- Jacqueline R Gerson
- Department of Biology, Duke University, Durham, North Carolina 27708, United States
| | - David M Walters
- U.S. Geological Survey, Columbia Environmental Research Center, Columbia, Missouri 65201, United States
| | - Collin A Eagles-Smith
- U.S. Geological Survey, Forest and Rangeland Ecosystem Science Center, Corvallis, Oregon 97330, United States
| | - Emily S Bernhardt
- Department of Biology, Duke University, Durham, North Carolina 27708, United States
| | - Jessica E Brandt
- Department of Natural Resources and the Environment & Center for Environmental Sciences and Engineering, University of Connecticut, Storrs, Connecticut 06269, United States
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27
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Leaphart JC, Oldenkamp RE, Bryan AL, Kennamer RA, Beasley JC. Patterns of Trace Element Accumulation in Waterfowl Restricted to Impoundments Holding Coal Combustion Waste. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2020; 39:1052-1059. [PMID: 32096287 DOI: 10.1002/etc.4697] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 11/26/2019] [Accepted: 02/20/2020] [Indexed: 06/10/2023]
Abstract
Waterfowl are often exposed to and readily accumulate anthropogenic contaminants when foraging in polluted environments. Settling impoundments containing coal combustion waste (CCW) enriched in trace elements such as arsenic (As), selenium (Se), and mercury (Hg) are often used by free-ranging migratory and resident waterfowl and represent potential sources for contaminant uptake. To assess accumulation of CCW contaminants, we experimentally restricted waterfowl to a CCW-contaminated impoundment and quantified trace element burdens in blood, muscle, and liver tissues over known periods of exposure (between 3 and 92 d). From these data we developed models 1) to predict elemental bioaccumulation with increased exposure time, and 2) to predict muscle/liver burdens based on concentrations in blood as a nondestructive sampling method. Although Hg and As did not bioaccumulate in our waterfowl, we observed an increase in Se concentrations in muscle, liver, and blood tissues over the duration of our experiment. Furthermore, we found that blood may be used as an effective nondestructive sampling alternative to predict muscle and liver tissue concentrations in birds contaminated with Se and As through dietary exposure. These data provide unique insights into accumulation rates of contaminants for waterfowl utilizing habitats contaminated with CCW and demonstrate the efficacy of nonlethal sampling of waterfowl to quantify contaminant exposure. Environ Toxicol Chem 2020;39:1052-1059. © 2020 SETAC.
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Affiliation(s)
- James C Leaphart
- Savannah River Ecology Laboratory, University of Georgia, Aiken, South Carolina, USA
- Warnell School of Forestry and Natural Resources, University of Georgia, Athens, Georgia, USA
| | - Ricki E Oldenkamp
- Savannah River Ecology Laboratory, University of Georgia, Aiken, South Carolina, USA
- Warnell School of Forestry and Natural Resources, University of Georgia, Athens, Georgia, USA
| | - Albert L Bryan
- Savannah River Ecology Laboratory, University of Georgia, Aiken, South Carolina, USA
| | - Robert A Kennamer
- Savannah River Ecology Laboratory, University of Georgia, Aiken, South Carolina, USA
| | - James C Beasley
- Savannah River Ecology Laboratory, University of Georgia, Aiken, South Carolina, USA
- Warnell School of Forestry and Natural Resources, University of Georgia, Athens, Georgia, USA
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28
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Herrmann SJ, Nimmo DWR, Carsella JS, Melnykov IV, Kennedy CM, Rogers KB, Herrmann-Hoesing LM. Differential Bioaccumulation of Mercury and Selenium in Stomach Contents and Tissues of Three Colorado, USA, Cutthroat Trout Populations. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2020; 104:595-601. [PMID: 32242255 DOI: 10.1007/s00128-020-02836-7] [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: 11/04/2019] [Accepted: 03/24/2020] [Indexed: 06/11/2023]
Abstract
Total mercury (THg) and selenium (TSe) levels were measured in stomach contents (SC) and twelve tissues of cutthroat trout (Oncorhynchus clarkii) occurring in three high-elevation lakes of Colorado, USA, inhabiting watersheds absent past and current mining activities. For 32 of 36 tissues, including muscle, mean THg wet weight (ww) concentrations were greater than in the diet (SC) for all sites, indicating biomagnification. Ranges of THg (µg/kg ww) for SC and stomach tissue (ST) were 1.23-73.54 and 14.55-61.35, respectively. Selenium concentrations in fish muscle were not greater than in the SC indicating a trophic transfer factor < 1.0. However, in several other tissues, mean Se dry weight (dw) levels were greater than in SC for all three lakes. Ranges of TSe for SC and ST were 166-7544 and 797-7523 (µg/kg dw), respectively. The muscle to egg/ovary ratio for Se averaged 2.30, 4.60, and 2.68 for the three populations. The variability of SC (planktonic vs. benthic) and differential distributions of THg and TSe in SC and organ-tissues generated questions focusing on the seasonal, physiological, and genetic drivers of these organometal(loid)s in subalpine trout.
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Affiliation(s)
- Scott J Herrmann
- Department of Biology, Colorado State University-Pueblo, 2200 Bonforte Boulevard, Pueblo, CO, 81001, USA.
| | - Del Wayne R Nimmo
- Department of Biology, Colorado State University-Pueblo, 2200 Bonforte Boulevard, Pueblo, CO, 81001, USA
| | - James S Carsella
- Department of Chemistry, Colorado State University-Pueblo, 2200 Bonforte Boulevard, Pueblo, CO, 81001, USA
| | - Igor V Melnykov
- Department of Mathematics and Statistics, University of Minnesota Duluth, 1117 University Drive, Duluth, MN, 55812, USA
| | - Christopher M Kennedy
- U.S. Fish and Wildlife Service, Colorado Fish and Wildlife Conservation Office, 1131 Fairway Circle B2, Estes Park, CO, 80517, USA
| | - Kevin B Rogers
- Aquatic Research Section, Colorado Parks and Wildlife, PO Box 775777, Steamboat Springs, CO, 80477, USA
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29
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Xie Q, Qian L, Liu S, Wang Y, Zhang Y, Wang D. Assessment of long-term effects from cage culture practices on heavy metal accumulation in sediment and fish. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 194:110433. [PMID: 32171119 DOI: 10.1016/j.ecoenv.2020.110433] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Revised: 02/29/2020] [Accepted: 03/03/2020] [Indexed: 06/10/2023]
Abstract
Fish cage farming has been generally banned in some regions since there is growing concern about adverse environmental issue caused by cage culture practices. This paper presents the long-term effects of past cage culture activities on heavy metal accumulation in sediment and fish in one historical cage culture lake (Changshou reservoir, Chongqing, China). Although cages were removed for over one decade in this studied lake, the average concentrations of heavy metals in sediments were still above 2 times higher than their background values, posing a moderate ecological risk. Higher levels of heavy metals appeared in demersal fish who is more susceptible to heavy metals exposure in sediment. Fish consumption would not lead to a significant health risk of most heavy metals. Hg levels in catfish posed a health risk to vulnerable group (children) and specific group (fishermen), whereas the presence of Se decreased Hg toxicity to a safety level. Therefore, it can be speculated that the cage culture activities could influence the heavy metal accumulation in sediment in the long term, however, consumption of current farmed fish in one lake used to carry out cage-culture is safe for local residents.
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Affiliation(s)
- Qing Xie
- Interdisciplinary Research Center for Agriculture Green Development in Yangtze River Basin, College of Resources and Environment, Southwest University, Chongqing, 400715, China
| | - Lishan Qian
- Interdisciplinary Research Center for Agriculture Green Development in Yangtze River Basin, College of Resources and Environment, Southwest University, Chongqing, 400715, China
| | - Shanyi Liu
- Interdisciplinary Research Center for Agriculture Green Development in Yangtze River Basin, College of Resources and Environment, Southwest University, Chongqing, 400715, China
| | - Yongmin Wang
- Interdisciplinary Research Center for Agriculture Green Development in Yangtze River Basin, College of Resources and Environment, Southwest University, Chongqing, 400715, China.
| | - Yongjiang Zhang
- Interdisciplinary Research Center for Agriculture Green Development in Yangtze River Basin, College of Resources and Environment, Southwest University, Chongqing, 400715, China; Ecological Environmental Monitoring Station of Qianjiang District in Chongqing, Chongqing, 409099, China
| | - Dingyong Wang
- Interdisciplinary Research Center for Agriculture Green Development in Yangtze River Basin, College of Resources and Environment, Southwest University, Chongqing, 400715, China.
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30
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Day NK, Schmidt TS, Roberts JJ, Osmundson BC, Willacker JJ, Eagles-Smith CA. Mercury and selenium concentrations in fishes of the Upper Colorado River Basin, southwestern United States: A retrospective assessment. PLoS One 2020; 15:e0226824. [PMID: 31929573 PMCID: PMC6957192 DOI: 10.1371/journal.pone.0226824] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Accepted: 12/04/2019] [Indexed: 11/18/2022] Open
Abstract
Mercury (Hg) and selenium (Se) are contaminants of concern for fish in the Upper Colorado River Basin (UCRB). We explored Hg and Se in fish tissues (2,324 individuals) collected over 50 years (1962-2011) from the UCRB. Samples include native and non-native fish collected from lotic waterbodies spanning 7 major tributaries to the Colorado River. There was little variation of total mercury (THg) in fish assemblages basin-wide and only 13% (272/1959) of individual fish samples exceeded the fish health benchmark (0.27 μg THg/g ww). Most THg exceedances were observed in the White-Yampa tributary whereas the San Juan had the lowest mean THg concentration. Risks associated with THg are species specific with exceedances dominated by Colorado Pikeminnow (mean = 0.38 and standard error ± 0.08 μg THg/g ww) and Roundtail Chub (0.24 ± 0.06 μg THg/g ww). For Se, 48% (827/1720) of all individuals exceeded the fish health benchmark (5.1 μg Se/g dw). The Gunnison river had the most individual exceedances of the Se benchmark (74%) whereas the Dirty Devil had the fewest. We identified that species of management concern accumulate THg and Se to levels above risk thresholds and that fishes of the White-Yampa (THg) and Gunnison (Se) rivers are at the greatest risk in the UCRB.
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Affiliation(s)
- Natalie K. Day
- U.S. Geological Survey, Southwest Biological Science Center, Moab, Utah, United States of America
| | - Travis S. Schmidt
- U.S. Geological Survey, Colorado Water Science Center, Fort Collins, Colorado, United States of America
| | - James J. Roberts
- U.S. Geological Survey, Colorado Water Science Center, Fort Collins, Colorado, United States of America
| | - Barbara C. Osmundson
- U.S. Fish and Wildlife Service, Grand Junction, Colorado, United States of America
| | - James J. Willacker
- U.S. Geological Survey, Forest and Rangeland Ecosystem Science Center, Corvallis, Oregon, United States of America
| | - Collin A. Eagles-Smith
- U.S. Geological Survey, Forest and Rangeland Ecosystem Science Center, Corvallis, Oregon, United States of America
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Ralston NVC, Kaneko JJ, Raymond LJ. Selenium health benefit values provide a reliable index of seafood benefits vs. risks. J Trace Elem Med Biol 2019; 55:50-57. [PMID: 31345365 DOI: 10.1016/j.jtemb.2019.05.009] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 05/09/2019] [Accepted: 05/20/2019] [Indexed: 12/15/2022]
Abstract
BACKGROUND Methylmercury (CH3Hg) toxicity causes irreversible inhibition of selenium (Se)-dependent enzymes, including those that are required to prevent and reverse oxidative damage in the brain. Fish consumption provides numerous essential nutrients required for optimal health, but is also associated with CH3Hg exposure risks, especially during fetal development. Therefore, it is necessary to assess the amounts of both elements in seafood to evaluate relative risks or benefits. Consumption of ocean fish containing Se in molar excess of CH3Hg will prevent interruption of selenoenzyme activities, thereby alleviating Hg-exposure risks. Because dietary Se is a pivotal determinant of CH3Hg's effects, the Selenium Health Benefit Value (HBV) criterion was developed to predict risks or benefits as a result of seafood consumption. A negative HBV indicates Hg is present in molar excess of Se and may impair Se availability while a positive HBV indicates consumption will improve the Se status of the consumer, thus negating risks of Hg toxicity. OBJECTIVE This study examined the Hg and Se contents of varieties of seafood to establish those with positive HBV's offering benefits and those having negative HBVs indicating potential consumption risks. METHODS The Hg and Se molar concentrations in samples of meat from pilot whale, mako shark, thresher shark, swordfish, bigeye tuna, and skipjack tuna were used to determine their HBV's in relation to body weight. RESULTS The HBVs of pilot whale, mako shark, and swordfish were typically negative and inversely related to body weight, indicating their consumption may impair Se availability. However, the HBV's of thresher shark, bigeye tuna, and skipjack tuna were uniformly positive regardless of body weights, indicating their consumption counteracts Hg-dependent risks of selenoenzyme impairment. CONCLUSIONS The HBV criterion provides a reliable basis for differentiating seafoods whose intake should be limited during pregnancy from those that should be consumed to obtain health benefits.
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Affiliation(s)
- Nicholas V C Ralston
- 310 Clifford Hall, Earth Systems Science and Policy, University of North Dakota, Grand Forks, ND, 58202, United States
| | - J John Kaneko
- Hawaii Seafood Council, 1130 N Nimitz Hwy, Suite A263, Honolulu, HI, 96817, United States
| | - Laura J Raymond
- Sage Green Nutrition Research Guidance, 421 N 19thStreet, Grand Forks, ND, 58203, United States
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Zhang R, Wu F, Giesy JP. Tissue-based assessment of hazard posed by mercury and selenium to wild fishes in two shallow Chinese lakes. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:15989-15999. [PMID: 30963435 DOI: 10.1007/s11356-019-04504-8] [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: 10/16/2018] [Accepted: 02/05/2019] [Indexed: 06/09/2023]
Abstract
Total (all forms of inorganic and organic) concentrations of mercury (Hg) and selenium (Se) were measured in dorsal muscle and eggs of wild fishes from two shallow lakes in China: Tai Lake (Ch: Taihu; TL) and Baiyangdian Lake (BYDL). Hazard quotients (HQs) were calculated by dividing concentrations of Se or Hg in muscle or eggs of fishes by threshold concentrations for effects expressed as tissue residue toxicity reference values (TR-TRVs). Concentrations of Hg in whole bodies of fishes were estimated by concentrations in muscle. Based on concentrations of Hg in whole body, HQs for fishes in TL and BYDL were less than 1.0, which suggests little to moderate potential for effects on these fishes and unaccepted adverse effects of Hg are unexpected for adult fishes. HQs of Se in muscle of common carp from TL were closed to 1.0, and 27% of HQs based on concentrations of Hg in eggs of fishes from BYDL exceeded 1.0. Potential hazard due to Hg on common carp in TL and reproductive effects of Se on fishes from BYDL exhibited need for concern. Ratios of molar concentrations of Se to Hg were greater than 1.0. Thus, there might be some protective effects of Se on effects of Hg on fishes in TL and BYDL.
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Affiliation(s)
- Ruiqing Zhang
- School of Ecology and Environment, Inner Mongolia University, Hohhot, 010021, Inner Mongolia, China.
| | - Fengchang Wu
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
| | - John P Giesy
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
- Department of Veterinary Biomedical Sciences and Toxicology Centre, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
- Zoology Department and Center for Integrative Toxicology, Michigan State University, East Lansing, MI, 48824, USA
- Department of Environmental Science, Baylor University, Waco, TX, USA
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Kuras R, Kozlowska L, Reszka E, Wieczorek E, Jablonska E, Gromadzinska J, Stanislawska M, Janasik B, Wasowicz W. Environmental mercury exposure and selenium-associated biomarkers of antioxidant status at molecular and biochemical level. A short-term intervention study. Food Chem Toxicol 2019; 130:187-198. [PMID: 31078725 DOI: 10.1016/j.fct.2019.04.056] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2019] [Revised: 04/16/2019] [Accepted: 04/29/2019] [Indexed: 11/30/2022]
Abstract
Mercury (Hg) is a potent toxicant. In the field of public health a chronic-low-level environmental Hg exposure resulting from fish consumption in general population is still being discussed. The objective of the study was to assess the influence of real Hg exposure on biomarkers of selenium (Se) status and selected biomarkers of pro-oxidant/anti-oxidant effects in healthy men (n = 67) who participated in the short-term intervention study consisting in daily fish consumption for two weeks. The analysis included Se level, Se-associated antioxidants at molecular (profile of 7 genes encoding selected proteins related to antioxidant defense) and biochemical levels (Se-dependent glutathione peroxidases activities and plasma selenoprotein P concentration). A pro-oxidant/anti-oxidant balance was explored using a biomarker of plasma lipid peroxidation and total antioxidant activity. The study revealed significant correlations (p < 0.05) between the biomarkers of exposure to Hg, Se level and Se-dependent antioxidants. Even though the risk of adverse effects of Hg for volunteers was substantially low, biomarkers of Hg altered levels of circulation selenoproteins and their genes expression. Changes in genes expression during study differed between the main enzymes involved in two systems: downregulation of thioredoxin reductase1 and upregulation of glutathione peroxidases. Hg exposure caused imbalance between the biomarkers of pro-oxidant/anti-oxidant effects.
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Affiliation(s)
- Renata Kuras
- Nofer Institute of Occupational Medicine, Department of Biological and Environmental Monitoring, 8 Teresy St, 91-348, Lodz, Poland.
| | - Lucyna Kozlowska
- Department of Dietetics, Faculty of Human Nutrition and Consumer Sciences, University of Life Sciences, Nowoursynowska 159c St., Building 32, 02-776, Warsaw, Poland
| | - Edyta Reszka
- Nofer Institute of Occupational Medicine, Department of Molecular Genetics and Epigenetics, 8 Teresy St, 91-348, Lodz, Poland
| | - Edyta Wieczorek
- Nofer Institute of Occupational Medicine, Department of Molecular Genetics and Epigenetics, 8 Teresy St, 91-348, Lodz, Poland
| | - Ewa Jablonska
- Nofer Institute of Occupational Medicine, Department of Molecular Genetics and Epigenetics, 8 Teresy St, 91-348, Lodz, Poland
| | - Jolanta Gromadzinska
- Nofer Institute of Occupational Medicine, Department of Biological and Environmental Monitoring, 8 Teresy St, 91-348, Lodz, Poland
| | - Magdalena Stanislawska
- Nofer Institute of Occupational Medicine, Department of Biological and Environmental Monitoring, 8 Teresy St, 91-348, Lodz, Poland
| | - Beata Janasik
- Nofer Institute of Occupational Medicine, Department of Biological and Environmental Monitoring, 8 Teresy St, 91-348, Lodz, Poland
| | - Wojciech Wasowicz
- Nofer Institute of Occupational Medicine, Department of Biological and Environmental Monitoring, 8 Teresy St, 91-348, Lodz, Poland
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Plessl C, Gilbert BM, Sigmund MF, Theiner S, Avenant-Oldewage A, Keppler BK, Jirsa F. Mercury, silver, selenium and other trace elements in three cyprinid fish species from the Vaal Dam, South Africa, including implications for fish consumers. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 659:1158-1167. [PMID: 31096329 DOI: 10.1016/j.scitotenv.2018.12.442] [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: 09/11/2018] [Revised: 12/15/2018] [Accepted: 12/28/2018] [Indexed: 05/29/2023]
Abstract
The levels of Cr, Cu, Zn, Se, Ag, Cd, Hg, and Pb were determined in muscle and liver samples from 30 specimens of fish belonging to the species Labeobarbus aeneus, Labeobarbus kimberleyensis, and Labeo umbratus from the Vaal Dam. Health risks for human fish consumers were estimated using the target hazard quotient (THQ), the Se:Hg-ratio, and Se health benefit value (Se HBV). This is the first comprehensive report on Hg levels in fish from this lake. Mean concentrations ranging from 0.247-0.481 mg/kg dw in muscle and from 0.170-0.363 mg/kg dw in liver clearly show a contamination with this element. Although levels in muscle did not exceed maximum allowances for human consumption, a calculated THQ of 0.12 and 0.14 for the two Labeobarbus species, respectively, showed a potential risk due to additive effects. All Se:Hg-ratios as well as Se HBVs clearly suggested positive effects for fish consumers. Levels of Cu were remarkably high in the liver of L. umbratus, calling for further investigation on this species. Cadmium levels were above the maximum allowances for fish consumption in the liver of all three species (means between 0.190 and 0.460 mg/kg dw), but below the LOD in all muscle and intestine samples. This is also the first report of Ag in fish from South Africa. Levels were below the LOD in muscle, but well detectable in liver; they varied significantly between the two Labeobarbus species (0.054 ± 0.030 and 0.037 ± 0.016 mg/kg dw) compared to L. umbratus (1.92 ± 0.83 mg/kg dw) and showed a positive correlation with Cu levels (63.7 ± 17.0; 70.3 ± 9.0 and 1300 ± 823 mg/kg dw), possibly due to similar chemical affinities to metallothioneins. The detected Ag levels can serve as a basis to monitor the development of this new pollutant in aquatic environments in South Africa and worldwide.
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Affiliation(s)
- Christof Plessl
- University of Vienna, Faculty of Chemistry, Institute of Inorganic Chemistry, Althanstrasse 14, 1090 Vienna, Austria
| | - Beric M Gilbert
- University of Johannesburg, Dept. of Zoology, P. O. Box 524, Auckland Park, 2006, South Africa
| | - Martin F Sigmund
- University of Vienna, Faculty of Chemistry, Institute of Inorganic Chemistry, Althanstrasse 14, 1090 Vienna, Austria
| | - Sarah Theiner
- University of Vienna, Faculty of Chemistry, Institute of Analytical Chemistry, Waehringer Strasse 38, 1090 Vienna, Austria
| | | | - Bernhard K Keppler
- University of Vienna, Faculty of Chemistry, Institute of Inorganic Chemistry, Althanstrasse 14, 1090 Vienna, Austria
| | - Franz Jirsa
- University of Vienna, Faculty of Chemistry, Institute of Inorganic Chemistry, Althanstrasse 14, 1090 Vienna, Austria; University of Johannesburg, Dept. of Zoology, P. O. Box 524, Auckland Park, 2006, South Africa.
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35
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Qiu G, Abeysinghe KS, Yang XD, Xu Z, Xu X, Luo K, Goodale E. Effects of Selenium on Mercury Bioaccumulation in a Terrestrial food Chain from an Abandoned Mercury Mining Region. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2019; 102:329-334. [PMID: 30637433 DOI: 10.1007/s00128-019-02542-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2018] [Accepted: 01/09/2019] [Indexed: 06/09/2023]
Abstract
Few reports of the relationship exist between mercury (Hg) and selenium (Se) from locations of severe Hg contamination in terrestrial environments. Here, we report the concentrations of Hg and Se as well as Se:Hg molar ratios in biotic samples collected from a region with a long history of Hg mining. Nitrogen isotopes (δ15N) were analyzed to confirm the trophic levels. Results showed that bird feathers at the top trophic level exhibited the highest Hg concentrations, while the lowest concentrations were found in herbivorous insects, demonstrating a significant biomagnification across the food chain. In contrast, herbivorous insects of different types (generalists vs. specialized rice pests) exhibited both the highest and the lowest concentrations of Se, indicating a lack of biomagnification. Indeed, Se was correlated positively with Hg when Se:Hg ratios were greater than one, suggesting Se:Hg molar ratios can be a controlling influence on Hg in terrestrial organisms.
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Affiliation(s)
- Guangle Qiu
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, China.
| | - Kasun S Abeysinghe
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
- Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla, 666303, China
| | - Xiao-Dong Yang
- Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla, 666303, China
| | - Zhidong Xu
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xiaohang Xu
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Kang Luo
- Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla, 666303, China
| | - Eben Goodale
- Guangxi Key Laboratory of Forest Ecology and Conservation, College of Forestry, Guangxi University, Nanning, 530004, Guangxi, China
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36
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Azad AM, Frantzen S, Bank MS, Nilsen BM, Duinker A, Madsen L, Maage A. Effects of geography and species variation on selenium and mercury molar ratios in Northeast Atlantic marine fish communities. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 652:1482-1496. [PMID: 30586833 DOI: 10.1016/j.scitotenv.2018.10.405] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2018] [Revised: 10/26/2018] [Accepted: 10/29/2018] [Indexed: 06/09/2023]
Abstract
Methylmercury (MeHg) is a potent neurotoxin that bioaccumulates in seafood. Co-occurrence of selenium (Se) may affect the bioavailability and toxicity of MeHg in organisms. Here we report the concentrations of total mercury (Hg) and Se in 17 teleost fish species (n = 8459) sampled during 2006-2015 from the North East Atlantic Ocean (NEAO) and evaluate species variation and effects of geography. Mean Hg concentration ranged from 0.04 mg kg-1 ww in Atlantic mackerel (Scomber scombrus) and blue whiting (Micromesistius poutassou) to 0.72 mg kg-1 ww in blue ling (Molva dypterygia). Se concentrations were less variable and ranged from 0.27 mg kg-1 ww in Atlantic cod (Gadus morhua) to 0.56 mg kg-1 ww in redfish (Sebastes spp.). The mean Se:Hg molar ratio ranged from 1.9 in blue ling to 43.3 in mackerel. Pelagic species had the lowest Hg concentrations and the highest Se:Hg ratios, whereas demersal species had the highest Hg concentrations and the lowest Se:Hg ratios. Se and Hg concentrations were positively correlated in 13 of the 17 species. Hg concentrations increased from the North to South in contrast to the Se:Hg molar ratio which exhibited the opposite trend. Fish from fjord and coastal areas had higher concentrations of Hg and lower Se:Hg molar ratios compared to fish sampled offshore. All species had average Se:Hg molar ratios >1 and Hg concentrations were largely below the EU maximum level of 0.5 mg kg-1 ww with few exceptions including the deep water species tusk (Brosme brosme) and blue ling sampled from fjord and coastal habitats. Our results show that two fillet servings of tusk, blue ling or Atlantic halibut (Hippoglossus hippoglossus) exceeded the tolerable weekly intake of MeHg although the surplus Se may possibly ameliorate the toxic effects of MeHg. However, some individuals with selenium deficiencies may exhibit greater sensitivity to MeHg.
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Affiliation(s)
- Atabak M Azad
- Institute of Marine Research, Bergen, Norway; Faculty of Mathematics and Natural Sciences, University of Bergen, Bergen, Norway.
| | | | - Michael S Bank
- Institute of Marine Research, Bergen, Norway; Department of Environmental Conservation, University of Massachusetts Amherst, USA.
| | | | | | - Lise Madsen
- Institute of Marine Research, Bergen, Norway; Department of Biology, University of Copenhagen, Denmark
| | - Amund Maage
- Institute of Marine Research, Bergen, Norway; Faculty of Mathematics and Natural Sciences, University of Bergen, Bergen, Norway
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Bergés-Tiznado ME, Fernando Márquez-Farías J, Cristina Osuna-Martínez C, Torres-Rojas YE, Galván-Magaña F, Páez-Osuna F. Patterns of mercury and selenium in tissues and stomach contents of the dolphinfish Coryphaena hippurus from the SE Gulf of California, Mexico: Concentrations, biomagnification and dietary intake. MARINE POLLUTION BULLETIN 2019; 138:84-92. [PMID: 30660317 DOI: 10.1016/j.marpolbul.2018.11.023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Revised: 11/11/2018] [Accepted: 11/13/2018] [Indexed: 06/09/2023]
Abstract
Selenium and mercury were evaluated in tissues and stomachs of the dolphinfish Coryphaena hippurus from two sites in the Southeastern Gulf of California. Hg levels were consistently low and exhibited the following patterns: muscle (0.14 ± 0.01 μg/g wet weight) followed by kidney (0.12 ± 0.02 μg/g), liver (0.11 ± 0.01 μg/g), and gonads (0.04 ± 0.00 μg/g). The maximum of Se was found in the kidney (5.60 ± 0.40 μg/g) and the minimum in muscle (0.60 ± 0.01 μg/g). All the Se:Hg molar ratios were between 3.7 and 697.1, with the minimum in muscle and the highest in gonads. The results indicate a contrasting behavior biomagnification of Hg and Se; smaller fish (<80 cm FL) did not exhibit biomagnification, in contrast with larger fish (>90 cm FL: 100% for Hg; 65% for Se). These results appear to be related to different feeding habits and availability of prey.
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Affiliation(s)
- Magdalena E Bergés-Tiznado
- Posgrado en Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Unidad Académica Mazatlán, P.O. Box 811, C.P. 82000 Mazatlán, Sinaloa, Mexico; Universidad Politécnica de Sinaloa, Carretera Municipal Libre Mazatlán-Higueras km. 3, C.P. 82199 Mazatlán, Sinaloa, Mexico
| | - J Fernando Márquez-Farías
- Facultad de Ciencias del Mar, Universidad Autónoma de Sinaloa, Paseo Claussen S/N Col. Centro, C.P. 82000 Mazatlán, Sinaloa, Mexico
| | - C Cristina Osuna-Martínez
- Facultad de Ciencias del Mar, Universidad Autónoma de Sinaloa, Paseo Claussen S/N Col. Centro, C.P. 82000 Mazatlán, Sinaloa, Mexico
| | - Yassir Edén Torres-Rojas
- Universidad Nacional Autónoma de México, Instituto de Ciencias del Mar y Limnología, Unidad Académica Mazatlán, P.O. Box 811, C.P. 82000 Mazatlán, Sinaloa, Mexico; Instituto de Ecología, Pesquerías y Oceanografía del Golfo de México, Universidad Autónoma de Campeche (EPOMEX-UAC), Campus 6. Av. Héroe de Nacozari #480, C.P. 24029, Campeche, Campeche, Mexico
| | - Felipe Galván-Magaña
- Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Av. IPN S/N Col. Playa de Santa Rita, C.P. 23096 La Paz, Baja California Sur, Mexico
| | - Federico Páez-Osuna
- Universidad Nacional Autónoma de México, Instituto de Ciencias del Mar y Limnología, Unidad Académica Mazatlán, P.O. Box 811, C.P. 82000 Mazatlán, Sinaloa, Mexico; Miembro de El Colegio de Sinaloa, Antonio Rosales 435 Pte, Culiacán, Sinaloa, Mexico.
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Osmundson BC, Lusk JD. Field Assessment of Colorado pikeminnow Exposure to Mercury Within Its Designated Critical Habitat in Colorado, Utah, and New Mexico. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2019; 76:17-30. [PMID: 30259077 PMCID: PMC6326962 DOI: 10.1007/s00244-018-0566-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Accepted: 09/17/2018] [Indexed: 06/08/2023]
Abstract
Mercury contamination in freshwater fish is widespread across North America, including the western United States. Atmospheric mercury from both natural and manmade emissions deposits into watersheds and, through methylation and biomagnification, accumulates in aquatic food webs. Highest mercury concentrations are found in predatory fish. The endangered Colorado pikeminnow (Ptychocheilus lucius) is a long-lived, top-level piscivore endemic to the Colorado River basin. Mercury exposure to Colorado pikeminnow and another native fish species, the roundtail chub (Gila robusta), was assessed by analyzing muscle tissues collected using a nonlethal technique. Mercury concentrations in Colorado pikeminnow > 400-mm long, captured from critical habitat throughout the species' present range, exceeded the tissue threshold-effect level of 0.2 µg/g wet weight (WW) for whole body fish (0.31 µg/g WW in muscle) recommended to protect fish from injury. Mercury is a neurotoxin and endocrine disruptor, and impacts to fish may include reduced ability to avoid predators, secure food, and reproduce. The highest mercury concentrations were found in both Colorado pikeminnow and roundtail chub collected from the White River, a tributary to the Green River. Colorado pikeminnow from the White and Green rivers had the highest mean mercury concentrations and the lowest mean relative body conditions. Exposure to high mercury concentrations may act in concert with other threatening factors to compromise Colorado pikeminnow population viability and eventual recovery.
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Affiliation(s)
- Barbara C Osmundson
- Colorado Ecological Services, Western Colorado Field Office, US Fish and Wildlife Service, 445 West Gunnison Ave., Suite 240, Grand Junction, CO, 81501-5711, USA.
- , 380 34 Road, Palisade, CO, 81526, USA.
| | - Joel D Lusk
- New Mexico Ecological Services, US Fish and Wildlife Service, 2105 Osuna Road NE, Albuquerque, NM, 87113-1001, USA.
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Land SN, Rocha RCC, Bordon IC, Saint'Pierre TD, Ziolli RL, Hauser-Davis RA. Biliary and hepatic metallothionein, metals and trace elements in environmentally exposed neotropical cichlids Geophagus brasiliensis. J Trace Elem Med Biol 2018; 50:347-355. [PMID: 30262303 DOI: 10.1016/j.jtemb.2018.07.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Revised: 07/21/2018] [Accepted: 07/23/2018] [Indexed: 01/09/2023]
Abstract
One of the metal detoxifying mechanisms that occurs in fish is metallothionein (MT) induction and metal binding. Hepatic MT induction has been well described, but biliary MT metal detoxification has only recently been described in fish. In this scenario, metal-metal interactions have been increasingly evaluated to further understand the behavior of these contaminants regarding homeostasis and biological functions, as well as their toxic effects. Studies, however, have been mainly conducted concerning the elemental pair Se-Hg, and scarce reports are available concerning other metal pairs. Therefore, this study aimed to evaluate biliary and hepatic MT metal detoxification mechanisms in a territorial neotropical cichlid, Geophagus brasiliensis. Fish were sampled from the anthropogenically impacted estuarine Rodrigo de Freitas Lagoon, located in Southern Rio de Janeiro, and trace elements and MT were determined by inductively coupled plasma mass spectrometry (ICP-MS) and UV-Vis spectrophotometry, respectively, in fish liver and bile. MT in bile were significantly lower than in liver. Significant differences between bile and liver were observed for many trace elements, and, although most were higher in liver, Cd and Ni were significantly higher in bile, indicating efficient excretion from the body via the biliary route. A significant correlation was observed between MT and Fe in bile, and between MT in liver and Cu and Zn in bile. Molar ratio calculations demonstrated protective elements effects against Al, As, Cd, Hg, Pb and V in both bile and liver, as well as some novel interrelationships, indicating the importance of these investigations regarding the elucidation of element detoxifying mechanisms. Furthermore, investigation of other elemental associations may aid in decision-making processes regarding environmental contamination scenarios linked to public health.
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Affiliation(s)
- Sylvia N Land
- Universidade Federal do Estado do Rio de Janeiro (UNIRIO), Programa de Pós-Graduação em Biodiversidade Neotropical, Av. Pasteur, 458, Urca, CEP: 22290-240, Rio de Janeiro, RJ, Brazil
| | - Rafael Christian C Rocha
- Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), Departamento de Química, Rua Marquês de São Vicente, 225, Gávea, CEP: 22453-900, Rio de Janeiro, RJ, Brazil
| | - Isabella C Bordon
- Universidade do Estado de São Paulo (UNESP), Campus do Litoral Paulista, Praça Infante Dom Henrique, s/no, Parque Bitaru, CEP: 11330-900, São Vicente, São Paulo, SP, Brazil
| | - Tatiana D Saint'Pierre
- Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), Departamento de Química, Rua Marquês de São Vicente, 225, Gávea, CEP: 22453-900, Rio de Janeiro, RJ, Brazil
| | - Roberta L Ziolli
- Universidade Federal do Estado do Rio de Janeiro (UNIRIO), Programa de Pós-Graduação em Biodiversidade Neotropical, Av. Pasteur, 458, Urca, CEP: 22290-240, Rio de Janeiro, RJ, Brazil
| | - Rachel A Hauser-Davis
- Fundação Oswaldo Cruz (Fiocruz), Centro de Estudos da Saúde do Trabalhador e Ecologia Humana, Escola Nacional de Saúde Pública Sérgio Arouca, Rua Leopoldo Bulhões, 1480, CEP: 21040-900, Manguinhos, Rio de Janeiro, RJ, Brazil.
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40
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Pokrovsky OS, Bueno M, Manasypov RM, Shirokova LS, Karlsson J, Amouroux D. Dissolved Organic Matter Controls Seasonal and Spatial Selenium Concentration Variability in Thaw Lakes across a Permafrost Gradient. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:10254-10262. [PMID: 30148609 DOI: 10.1021/acs.est.8b00918] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Little is known about the sources and processing of selenium, an important toxicant and essential micronutrient, within boreal and sub-arctic environments. Upon climate warming and permafrost thaw, the behavior of Se in northern peatlands becomes an issue of major concern, because a sizable amount of Se can be emitted to the atmosphere from thawing soils and inland water surfaces and exported to downstream waters, thus impacting the Arctic biota. Working toward providing a first-order assessment of spatial and temporal variation of Se concentration in thermokarst waters of the largest frozen peatland in the world, we sampled thaw lakes and rivers across a 750-km latitudinal profile. This profile covered sporadic, discontinuous, and continuous permafrost regions of western Siberia Lowland (WSL), where we measured dissolved (<0.45 μm) Se concentration during spring (June), summer (August), and autumn (September). We found maximum Se concentration in the discontinuous permafrost zone. Considering all sampled lakes, Se exhibited linear relationship ( R2 = 0.7 to 0.9, p < 0.05, n ≈ 70) with dissolved organic carbon (DOC) concentration during summer and autumn. Across the permafrost gradient, the lakes in discontinuous permafrost regions demonstrated stronger relationship with DOC and UV-absorbance compared to lakes in sporadic/isolated and continuous permafrost zones. Both seasonal and spatial features of Se distribution in thermokarst lakes and ponds suggest that Se is mainly released during thawing of frozen peat. Mobilization and immobilization of Se within peat-lake-river watersheds likely occurs as organic and organo-Fe, Al colloids, probably associated with reduced and elemental Se forms. The increase of active layer thickness may enhance leaching of Se in the form of organic complexes with aromatic carbon from the deep horizons of the peat profile. Further, the northward shift of permafrost boundaries in WSL may sizably increase Se concentration in lakes of continuous permafrost zone.
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Affiliation(s)
- Oleg S Pokrovsky
- Geoscience and Environment Toulouse, UMR 5563 CNRS , University of Toulouse , 31400 Toulouse , France
| | - Maite Bueno
- CNRS/UNIV PAU & PAYS ADOUR , Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux, UMR5254 , 64000 , Pau , France
| | - Rinat M Manasypov
- N. Laverov Federal Center for Integrated Arctic Research, IEPS , Russian Academy of Science , 16300 Arkhangelsk , Russia
- BIO-GEO-CLIM Laboratory , Tomsk State University , 634050 Tomsk , Russia
| | - Liudmila S Shirokova
- Geoscience and Environment Toulouse, UMR 5563 CNRS , University of Toulouse , 31400 Toulouse , France
- N. Laverov Federal Center for Integrated Arctic Research, IEPS , Russian Academy of Science , 16300 Arkhangelsk , Russia
| | - Jan Karlsson
- Climate Impacts Research Centre (CIRC), Department of Ecology and Environmental Science , Umeå University , 901 87 Umeå , Sweden
| | - David Amouroux
- CNRS/UNIV PAU & PAYS ADOUR , Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux, UMR5254 , 64000 , Pau , France
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41
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Kuras R, Reszka E, Wieczorek E, Jablonska E, Gromadzinska J, Malachowska B, Kozlowska L, Stanislawska M, Janasik B, Wasowicz W. Biomarkers of selenium status and antioxidant effect in workers occupationally exposed to mercury. J Trace Elem Med Biol 2018; 49:43-50. [PMID: 29895371 DOI: 10.1016/j.jtemb.2018.04.032] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Revised: 04/21/2018] [Accepted: 04/24/2018] [Indexed: 12/14/2022]
Abstract
The present observation based research was designed to evaluate the influence of occupational human exposure to metallic mercury (Hg°) vapor on the biomarkers of selenium status involved in the antioxidant defense system. For this purpose we determined Hg and selenium (Se) concentrations in body fluids, the markers of antioxidant effect measured as an activity of Se-dependent enzymes (red blood cell and plasma glutathione peroxidase: GPx1-RBC and GPx3-P), concentration of selenoprotein P in the plasma (SeP-P) and total antioxidant activity in the plasma (TAA-P) in 131 male workers from a chloralkali plant exposed to Hg° and 67 non-exposed males (control group). The mRNA expression levels of glutathione peroxidases (GPX1, GPX3), selenoprotein P (SEPP1), thioredoxin reductase 1 (TRXR1), thioredoxin 1 (TRX1), peroxiredoxins (PRDX1, PRDX2) were also examined in the leukocytes of peripheral blood. Hg concentration in the blood (Hg-B) and urine (Hg-U) samples was determined using the thermal decomposition amalgamation/atomic absorption spectrometry (TDA-AAS) method and Se concentrations in plasma (Se-P) and urine (Se-U) using the inductively coupled plasma mass spectrometry (ICP-MS) method. Activities of GPx1-RBC, GPx3-P and TAA-P were determined using the kinetic and spectrophotometric method, respectively. Gene expression analysis was performed using the quantitative Real-Time PCR. The results showed significant higher Hg levels among the Hg°-exposed workers in comparison to control group (12-times higher median for Hg-B and almost 74-times higher median for Hg-U concentration in chloralkali workers). Se-P was also significantly higher (Me (median): 82.85 μg/L (IQR (interquartile range) 72.03-90.28 μg/L) for chloralkali workers vs. Me: 72.74 μg/L (IQR 66.25-80.14 μg/L) for control group; p = 0.0001) but interestingly correlated inversely with Hg-U in chloralkali workers suggesting depletion of the Se protection among the workers with the highest Hg-U concentration. The mRNA level for GPX1, PRXD1 were markedly but significantly higher in the workers compared to the control group. Moreover, concentrations of Hg-B and Hg-U among the workers were significantly positively correlated with the levels of selenoprotein P at both the mRNA and selenoprotein levels. In the multivariate model, after adjusting to cofounders (dental amalgam fillings, age, BMI, job seniority time, smoking), we confirmed that Hg-U concentration was inversely correlated with genes expression of TRXR1. This is the first comprehensive assessment of the impact of occupational exposure of workers to Hg° at both the mRNA and selenoprotein levels, with investigation of fish intake obtained by means of a questionnaire. These findings suggest that exposure to Hg° alters gene expression of the antioxidant enzymes and the level of Se-containing selenoproteins.
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Affiliation(s)
- Renata Kuras
- Nofer Institute of Occupational Medicine, Department of Biological and Environmental Monitoring, Sw. Teresy 8 Street, 91-348 Lodz, Poland.
| | - Edyta Reszka
- Nofer Institute of Occupational Medicine, Department of Molecular Genetics and Epigenetics, Sw. Teresy 8 Street, 91-348 Lodz, Poland.
| | - Edyta Wieczorek
- Nofer Institute of Occupational Medicine, Department of Molecular Genetics and Epigenetics, Sw. Teresy 8 Street, 91-348 Lodz, Poland.
| | - Ewa Jablonska
- Nofer Institute of Occupational Medicine, Department of Molecular Genetics and Epigenetics, Sw. Teresy 8 Street, 91-348 Lodz, Poland.
| | - Jolanta Gromadzinska
- Nofer Institute of Occupational Medicine, Department of Biological and Environmental Monitoring, Sw. Teresy 8 Street, 91-348 Lodz, Poland.
| | - Beata Malachowska
- Medical University of Lodz, Department of Biostatistics and Translational Medicine, Mazowiecka 15 Street, 92-215 Lodz, Poland.
| | - Lucyna Kozlowska
- Department of Dietetics, Faculty of Human Nutrition and Consumer Sciences, University of Life Sciences, Nowoursynowska 159c Street, Warsaw, Poland.
| | - Magdalena Stanislawska
- Nofer Institute of Occupational Medicine, Department of Biological and Environmental Monitoring, Sw. Teresy 8 Street, 91-348 Lodz, Poland.
| | - Beata Janasik
- Nofer Institute of Occupational Medicine, Department of Biological and Environmental Monitoring, Sw. Teresy 8 Street, 91-348 Lodz, Poland.
| | - Wojciech Wasowicz
- Nofer Institute of Occupational Medicine, Department of Biological and Environmental Monitoring, Sw. Teresy 8 Street, 91-348 Lodz, Poland.
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Johnson TKB, LePrevost CE, Kwak TJ, Cope WG. Selenium, Mercury, and Their Molar Ratio in Sportfish from Drinking Water Reservoirs. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2018; 15:ijerph15091864. [PMID: 30158428 PMCID: PMC6164800 DOI: 10.3390/ijerph15091864] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Revised: 08/17/2018] [Accepted: 08/21/2018] [Indexed: 01/26/2023]
Abstract
Mercury (Hg) bioaccumulates in aquatic ecosystems and may pose a risk to humans who consume fish. Selenium (Se) has the ability to reduce Hg toxicity, but the current guidance for human consumption of fish is based on Hg concentration alone. The purpose of the present study was to examine the relationship between Se and Hg in freshwater sportfish, for which there is a paucity of existing data. We collected three species of fish from different trophic positions from two drinking water reservoirs in central North Carolina, USA, to assess Hg and Se concentrations in relation to fish total length and to compare two measures of the protective ability of Se, the Se:Hg molar ratio and Se health benefit value (HBVSe), to current guidance for Hg. According to the Se:Hg molar ratio, all of the low trophic position fish sampled and the middle trophic position fish sampled from one of the reservoirs were safe for consumption. The same number of fish were considered safe using the HBVSe. More fish were deemed unsafe when using the Se:Hg molar ratio and HBVSe than were considered unsafe when using the U.S. Environmental Protection Agency (USEPA) Hg threshold. These findings suggest that the measures of Se protection may be unnecessarily conservative or that the USEPA Hg threshold may not be sufficiently protective of human health, especially the health of sensitive populations like pregnant or nursing mothers and young children. Future examination of the Se:Hg molar ratio and HBVSe from a variety of fish tissue samples would help refine the accuracy of these measures so that they may be appropriately utilized in ecological and human health risk assessment.
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Affiliation(s)
- Tara K B Johnson
- Department of Applied Ecology, North Carolina State University, Raleigh, NC 27695, USA.
| | - Catherine E LePrevost
- Department of Applied Ecology, North Carolina State University, Raleigh, NC 27695, USA.
| | - Thomas J Kwak
- U.S. Geological Survey, North Carolina Cooperative Fish and Wildlife Research Unit, Department of Applied Ecology, North Carolina State University, Raleigh, NC 27695, USA.
| | - W Gregory Cope
- Department of Applied Ecology, North Carolina State University, Raleigh, NC 27695, USA.
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43
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Gong Y, Nunes LM, Greenfield BK, Qin Z, Yang Q, Huang L, Bu W, Zhong H. Bioaccessibility-corrected risk assessment of urban dietary methylmercury exposure via fish and rice consumption in China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 630:222-230. [PMID: 29477821 DOI: 10.1016/j.scitotenv.2018.02.224] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Revised: 02/18/2018] [Accepted: 02/18/2018] [Indexed: 06/08/2023]
Abstract
The role of seafood consumption for dietary methylmercury (MeHg) exposure is well established. Recent studies also reveal that rice consumption can be an important pathway for dietary MeHg exposure in some Hg-contaminated areas. However, little is known about the relative importance of rice versus finfish in MeHg exposure for urban residents in uncontaminated areas. Especially, the lack of data on MeHg bioaccessibility in rice hinders accurately assessing MeHg exposure via rice consumption, and its importance compared to fish. By correcting commonly used risk models with quantified MeHg bioaccessibility, we provide the first bioaccessibility-corrected comparison on MeHg risk in rice and fish for consumers in non-contaminated urban areas of China, on both city- and province-scales. Market-available fish and rice samples were cooked and quantified for MeHg bioaccessibility. Methylmercury bioaccessibility in rice (40.5±9.4%) was significantly (p<0.05) lower than in fish (61.4±14.2%). This difference does not result from selenium content but may result from differences in protein or fiber content. Bioaccessibility-corrected hazard quotients (HQs) were calculated to evaluate consumption hazard of MeHg for consumers in Nanjing city, and Monte Carlo Simulations were employed to evaluate uncertainty and variability. Results indicate that MeHg HQs were 0.14 (P50) and 0.54 (P90). Rice consumption comprised 27.2% of the overall dietary exposure to MeHg in Nanjing, while fish comprised 72.8%. Employing our bioaccessibility data combined with literature parameters, calculated relative contribution to MeHg exposure from rice (versus fish) was high in western provinces of China, including Sichuan (95.6%) and Guizhou (81.5%), and low to moderate in eastern and southern provinces (Guangdong: 6.6%, Jiangsu: 17.7%, Shanghai: 15.1%, Guangxi: 20.6%, Jiangxi: 22.8% and Hunan: 25.9%). This bioaccessibility-corrected comparison of rice versus fish indicates that rice consumption can substantively contribute to dietary MeHg exposure risk for urban populations in Asia, and should be regularly included in dietary MeHg exposure assessment.
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Affiliation(s)
- Yu Gong
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing, Jiangsu Province, People's Republic of China
| | - Luís M Nunes
- University of Algarve, Civil Engineering Research and Innovation for Sustainability Center, Faro, Portugal
| | - Ben K Greenfield
- Department of Environmental Sciences, Southern Illinois University Edwardsville, Edwardsville, IL 62026, USA
| | - Zhen Qin
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing, Jiangsu Province, People's Republic of China
| | - Qianqi Yang
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing, Jiangsu Province, People's Republic of China
| | - Lei Huang
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing, Jiangsu Province, People's Republic of China
| | - Wenbo Bu
- Institute of Dermatology, Chinese Academy of Medical Sciences, Peking Union Medical College, Nanjing, Jiangsu Province, People's Republic of China
| | - Huan Zhong
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing, Jiangsu Province, People's Republic of China; Environmental and Life Sciences Program (EnLS), Trent University, Peterborough, Ontario, Canada.
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44
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Wang X, Wu L, Sun J, Wei Y, Zhou Y, Rao Z, Yuan L, Liu X. Mercury Concentrations and Se:Hg Molar Ratios in Flyingfish (Exocoetus volitans) and Squid (Uroteuthis chinensis). BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2018; 101:42-48. [PMID: 29881941 DOI: 10.1007/s00128-018-2369-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Accepted: 05/25/2018] [Indexed: 06/08/2023]
Abstract
We measured total mercury (Hg) and selenium (Se) concentrations as well as stable nitrogen (N) isotopic composition in flyingfish and squid muscle tissues from the eastern Indian Ocean and western South China Sea. The results showed that the mean Hg concentration in squid muscle from the western South China Sea was lower than that in the eastern Indian Ocean. The Hg concentrations in flyingfish and squid muscle samples were positively correlated with organism size (length and weight) and δ15N in all the study areas. Furthermore, we found a negative correlation between Se and Hg in molar content of flyingfish and squid muscle from the western South China Sea. The Se:Hg molar ratio was significantly negative correlated with fish weight and δ15N, suggesting that the Se:Hg molar ratio decreases with the increase of fish size and trophic level in the food web.
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Affiliation(s)
- Xueying Wang
- School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui, People's Republic of China
- Anhui Province Key Laboratory of Polar Environment and Global Change, University of Science and Technology of China, Hefei, Anhui, People's Republic of China
| | - Libin Wu
- School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui, People's Republic of China
- Anhui Province Key Laboratory of Polar Environment and Global Change, University of Science and Technology of China, Hefei, Anhui, People's Republic of China
| | - Jing Sun
- School of Earth Sciences, University of Western Australia, 35 Stirling Highway, Perth, WA, 6009, Australia
| | - Yangyang Wei
- School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui, People's Republic of China
- Anhui Province Key Laboratory of Polar Environment and Global Change, University of Science and Technology of China, Hefei, Anhui, People's Republic of China
| | - Yongli Zhou
- School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui, People's Republic of China
- Anhui Province Key Laboratory of Polar Environment and Global Change, University of Science and Technology of China, Hefei, Anhui, People's Republic of China
| | - Zixuan Rao
- School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui, People's Republic of China
- Anhui Province Key Laboratory of Polar Environment and Global Change, University of Science and Technology of China, Hefei, Anhui, People's Republic of China
| | - Linxi Yuan
- Jiangsu Bio-Engineering Research Centre for Selenium, Suzhou, Jiangsu, People's Republic of China
| | - Xiaodong Liu
- School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui, People's Republic of China.
- Anhui Province Key Laboratory of Polar Environment and Global Change, University of Science and Technology of China, Hefei, Anhui, People's Republic of China.
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45
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Bjerregaard P, St John T, Biuki NA, Biserova MP, Christensen A, Pedersen KL. Retention and distribution of methylmercury administered in the food in marine invertebrates: Effect of dietary selenium. MARINE ENVIRONMENTAL RESEARCH 2018; 138:76-83. [PMID: 29706366 DOI: 10.1016/j.marenvres.2018.04.004] [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: 03/28/2018] [Revised: 04/13/2018] [Accepted: 04/16/2018] [Indexed: 06/08/2023]
Abstract
Methylmercury is transported along aquatic food chains from the lower trophic levels and selenium modulates the biokinetics of mercury in organisms in complex ways. We investigated the retention of orally administered methylmercury in various marine invertebrates and the effect of selenium hereon. Shrimps (Palaemon adpersus and P. elegans), blue mussels (Mytilus edulis), shore crabs (Carcinus maenas) and sea stars (Asterias rubens) eliminated methylmercury slowly (t½ = ½ to >1 year) and the copepod (Acartia tonsa) faster (t½ ∼ 12-24 h). Orally administered selenite augmented elimination of methylmercury in the copepod (in one of two experiments) and blue mussels, but not in shrimps, crabs and sea stars. Selenium generally alters the distribution of the body burden of mercury, leaving more mercury in muscle and less mercury in digestive glands or rest of the body - also in the species where total body retention is not affected.
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Affiliation(s)
- Poul Bjerregaard
- Department of Biology, University of Southern Denmark, Campusvej 55, DK-5230, Odense M, Denmark.
| | - Tanja St John
- Department of Biology, University of Southern Denmark, Campusvej 55, DK-5230, Odense M, Denmark
| | - Narges Amrollahi Biuki
- Department of Biology, University of Southern Denmark, Campusvej 55, DK-5230, Odense M, Denmark; Department of Marine Biology, Faculty of Marine Sciences and Technology, University of Hormozgan, Iran
| | - Maya Petrova Biserova
- Department of Biology, University of Southern Denmark, Campusvej 55, DK-5230, Odense M, Denmark
| | - Alan Christensen
- Department of Biology, University of Southern Denmark, Campusvej 55, DK-5230, Odense M, Denmark
| | - Knud Ladegaard Pedersen
- Department of Biology, University of Southern Denmark, Campusvej 55, DK-5230, Odense M, Denmark
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Faganeli J, Falnoga I, Horvat M, Klun K, Lipej L, Mazej D. Selenium and Mercury Interactions in Apex Predators from the Gulf of Trieste (Northern Adriatic Sea). Nutrients 2018; 10:E278. [PMID: 29495604 PMCID: PMC5872696 DOI: 10.3390/nu10030278] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Revised: 02/16/2018] [Accepted: 02/23/2018] [Indexed: 11/16/2022] Open
Abstract
Since the environmental levels of selenium (Se) can moderate the bioaccumulation and toxicity of mercury (Hg) in marine organisms, their interactions were studied in seawater, sediments, plankton and the benthic (Bull ray Pteromylaeus bovinus, Eagle ray Myliobatis aquila) and the pelagic (Pelagic stingray Dasyiatis violacea) rays, as apex predators in the Gulf of Trieste (Northern Adriatic Sea). Male and female rays showed no difference in the Se contents in muscle tissue. Pelagic species contained higher Se levels in muscle but slightly lower levels in the livers of both genders. The Hg/Se ratios in seawater dissolved and colloidal fractions, plankton and sediment were <0.5, while those in particulate matter were <1.3. In benthic ray species, a parallel increase in Se and Hg in muscle was observed, so that an increased in Hg (MeHg) bioaccumulation results in Se coaccumulation. The Hg/Se ratios (molar) in muscle and liver of pelagic and benthic rays were <1.4 and <0.7, respectively. The low levels of Hg in muscle and liver in all the ray species corresponded to low Hg/Se ratios and increases in muscle and liver to 1 at 7 µg/g, dry weight (dw) and 5 µg/g dw, respectively, i.e., about 1.6 µg/g wet weight (ww).
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Affiliation(s)
- Jadran Faganeli
- Marine Biological Station, National Institute of Biology, Fornace, 41 6330 Piran, Slovenia.
| | - Ingrid Falnoga
- Department Environmental Sciences, Jozef Stefan Institute, Jamova, 39 1000 Ljubljana, Slovenia.
| | - Milena Horvat
- Department Environmental Sciences, Jozef Stefan Institute, Jamova, 39 1000 Ljubljana, Slovenia.
| | - Katja Klun
- Marine Biological Station, National Institute of Biology, Fornace, 41 6330 Piran, Slovenia.
| | - Lovrenc Lipej
- Marine Biological Station, National Institute of Biology, Fornace, 41 6330 Piran, Slovenia.
| | - Darja Mazej
- Department Environmental Sciences, Jozef Stefan Institute, Jamova, 39 1000 Ljubljana, Slovenia.
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47
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Wang X, Wang WX. Selenium induces the demethylation of mercury in marine fish. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2017; 231:1543-1551. [PMID: 28928020 DOI: 10.1016/j.envpol.2017.09.014] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Revised: 09/06/2017] [Accepted: 09/06/2017] [Indexed: 06/07/2023]
Abstract
The antagonistic effect of selenium (Se) on mercury (Hg) toxicity has been known for decades. Earlier studies mainly focused on Hg-Se interaction based on biokinetics and bioaccumulation, but the influences of Se on in vivo biotransformation of methylmercury (MeHg) have not been well understood. We conducted a 42-day exposure study to investigate the dynamic changes of MeHg and its primary degradation product - inorganic mercury (IHg) - in different organs of black seabream (Acanthopagrus schlegeli) exposed to different dietary Se levels. A physiologically based pharmacokinetic (PBPK) model was then developed to describe the biotransformation and disposition of MeHg under the influence of Se. Our results demonstrated that Se significantly increased the transformation from MeHg into IHg, thereby decreasing the accumulation of MeHg. The simulation further showed that the intestine was the major site for demethylation, with an estimated rate 1.5-fold higher in high Se treatment than in low Se treatment. However, the hepatic demethylation rate was extremely low and comparable between the two treatments (0.012-0.015 d-1). These results strongly suggested that the intestine instead of the commonly assumed liver was the major site for Hg-Se interaction. Furthermore, Se did not show significant influences on the distribution and elimination of MeHg, but promoted the uptake and elimination of the generated IHg from demethylation. Therefore, Se-induced demethylation especially in the intestine played an important role in mitigating the MeHg accumulation. This study provided new sight to elucidate the Hg-Se interaction in fish.
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Affiliation(s)
- Xun Wang
- Division of Life Science, The Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong; Marine Environmental Laboratory, HKUST Shenzhen Research Institute, Shenzhen 518057, China
| | - Wen-Xiong Wang
- Division of Life Science, The Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong; Marine Environmental Laboratory, HKUST Shenzhen Research Institute, Shenzhen 518057, China.
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48
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Cusack LK, Eagles-Smith C, Harding AK, Kile M, Stone D. Selenium: Mercury Molar Ratios in Freshwater Fish in the Columbia River Basin: Potential Applications for Specific Fish Consumption Advisories. Biol Trace Elem Res 2017; 178:136-146. [PMID: 27928722 DOI: 10.1007/s12011-016-0907-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Accepted: 11/28/2016] [Indexed: 12/25/2022]
Abstract
Fish provide a valuable source of beneficial nutrients and are an excellent source of low fat protein. However, fish are also the primary source of methylmercury exposure in humans. Selenium often co-occurs with mercury and there is some evidence that selenium can protect against mercury toxicity yet States issue fish consumption advisories based solely on the risks that methylmercury pose to human health. Recently, it has been suggested the selenium: mercury molar ratio be considered in risk management. In order for agencies to utilize the ratio to set consumption guidelines, it is important to evaluate the variability in selenium and mercury in different fish species. We examined 10 different freshwater fish species found within the Columbia River Basin in order to determine the inter- and intra-specific variability in the selenium: mercury molar ratios and the selenium health benefit values. We found significant variation in selenium: mercury molar ratios. The mean molar ratios for each species were all above 1:1, ranging from 3.42:1 in Walleye to 27.2:1 in Chinook salmon. There was a positive correlation between both mercury and selenium with length for each fish species apart from yellow perch and rainbow trout. All species had health benefit values greater than 2. We observed considerable variability in selenium: mercury molar ratios within fish species collected in the Columbia River Basin. Although incorporating selenium: mercury molar ratios into fish consumption holds the potential for refining advisories and assessing the risk of methylmercury exposure, the current understanding of how these ratios apply is insufficient, and further understanding of drivers of variability in the ratios is needed.
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Affiliation(s)
| | - Collin Eagles-Smith
- U.S. Geological Survey, Forest and Rangeland Ecosystem Science Center, Corvallis, OR, USA
| | | | - Molly Kile
- Oregon State University, Corvallis, OR, USA
| | - Dave Stone
- Department of Environmental and Molecular Toxicology, Oregon State University, Corvallis, OR, USA
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Kalisinska E, Lanocha-Arendarczyk N, Kosik-Bogacka D, Budis H, Pilarczyk B, Tomza-Marciniak A, Podlasinska J, Cieslik L, Popiolek M, Pirog A, Jedrzejewska E. Muscle mercury and selenium in fishes and semiaquatic mammals from a selenium-deficient area. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2017; 136:24-30. [PMID: 27810577 DOI: 10.1016/j.ecoenv.2016.10.028] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Revised: 10/13/2016] [Accepted: 10/23/2016] [Indexed: 05/13/2023]
Abstract
The aim of this study was to investigate and compare total mercury (Hg), selenium (Se), and Se:Hg molar ratios in fish muscles (phytophages n=3; benthophages n=32; predators n=5) and semiaquatic carnivores, including piscivores (the European otter n=8, the feral American mink n=7) and the omnivorous raccoon (n=37) from a riverine European ecosystem in a Se-deficient area. The Hg concentration in fish reached 0.337μg/g dry weight, dw (0.084μg/g wet weight, ww). We found significant differences among Hg levels in tested vertebrate groups (predators vs benthophages: 0.893 vs 0.281μg/g; piscivores vs omnivores: 6.085 vs 0.566μg/g dw). Fish groups did not differ in Se concentrations, with a mean value of 0.653μg/g dw. Significant differences were revealed between Se levels in piscivorous and omnivorous carnivores (0.360 vs 0.786μg/g dw, respectively). Fish Se:Hg molar ratio values were >2.2. Benthophages had higher the ratio than predators but similar to phytophages. Among carnivores, piscivores had much lower the ratio than raccoon (0.14 vs 3.75) but raccoon and fish medians did not significantly differ. We found almost two times higher Se levels in fish and raccoons compared to piscivores, possibly resulting from lower fish Se digestibility by piscivores in contrast to higher absorption of plant Se by many fish and omnivorous raccoons. Considering that a tissue Se:Hg molar ratio <1 may be connected with a Hg toxicity potential increase, we assume that piscivores in Se-deficient area are in worse situation and more exposed to Hg than fish and omnivores.
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Affiliation(s)
- Elzbieta Kalisinska
- Department of Biology and Medical Parasitology, Pomeranian Medical University, in Szczecin, Poland
| | | | - Danuta Kosik-Bogacka
- Department of Biology and Medical Parasitology, Pomeranian Medical University, in Szczecin, Poland.
| | - Halina Budis
- Department of Health Education, University of Szczecin, Poland
| | - Bogumila Pilarczyk
- Chair of Animal Reproduction Biotechnology and Environmental Hygiene, West Pomeranian University of Technology in Szczecin, Poland
| | - Agnieszka Tomza-Marciniak
- Chair of Animal Reproduction Biotechnology and Environmental Hygiene, West Pomeranian University of Technology in Szczecin, Poland
| | - Joanna Podlasinska
- Department of Environmental Management and Protection, Western Pomeranian University of Technology,in Szczecin, Poland
| | | | - Marcin Popiolek
- Department of Parasitology, Institute of Genetics and Microbiology, University of Wroclaw, Poland
| | - Agnieszka Pirog
- Department of Invertebrate Systematics and Ecology, Institute of Biology, Wroclaw University of Environmental and Life Sciences, Poland
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Fuchsman PC, Brown LE, Henning MH, Bock MJ, Magar VS. Toxicity reference values for methylmercury effects on avian reproduction: Critical review and analysis. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2017; 36:294-319. [PMID: 27585374 DOI: 10.1002/etc.3606] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Revised: 05/28/2016] [Accepted: 08/29/2016] [Indexed: 06/06/2023]
Abstract
Effects of mercury (Hg) on birds have been studied extensively and with increasing frequency in recent years. The authors conducted a comprehensive review of methylmercury (MeHg) effects on bird reproduction, evaluating laboratory and field studies in which observed effects could be attributed primarily to Hg. The review focuses on exposures via diet and maternal transfer in which observed effects (or lack thereof) were reported relative to Hg concentrations in diet, eggs, or adult blood. Applicable data were identified for 23 species. From this data set, the authors identified ranges of toxicity reference values suitable for risk-assessment applications. Typical ranges of Hg effect thresholds are approximately 0.2 mg/kg to >1.4 mg/kg in diet, 0.05 mg/kg/d to 0.5 mg/kg/d on a dose basis, 0.6 mg/kg to 2.7 mg/kg in eggs, and 2.1 mg/kg to >6.7 mg/kg in parental blood (all concentrations on a wet wt basis). For Hg in avian blood, the review represents the first broad compilation of relevant toxicity data. For dietary exposures, the current data support TRVs that are greater than older, commonly used TRVs. The older diet-based TRVs incorporate conservative assumptions and uncertainty factors that are no longer justified, although they generally were appropriate when originally derived, because of past data limitations. The egg-based TRVs identified from the review are more similar to other previously derived TRVs but have been updated to incorporate new information from recent studies. While important research needs remain, a key recommendation is that species not yet tested for MeHg toxicity should be evaluated using toxicity data from tested species with similar body weights. Environ Toxicol Chem 2017;36:294-319. © 2016 SETAC.
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