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Rodrigues ET, Coelho JP, Pereira E, Pardal MA. Are mercury levels in fishery products appropriate to ensure low risk to high fish-consumption populations? MARINE POLLUTION BULLETIN 2023; 186:114464. [PMID: 36502771 DOI: 10.1016/j.marpolbul.2022.114464] [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: 06/23/2022] [Revised: 11/30/2022] [Accepted: 12/01/2022] [Indexed: 06/17/2023]
Abstract
The main goal of the present study is to determine the sources of methylmercury (MeHg) for high fish-consumption populations with the Portuguese population as showcase, as Portugal is the EU country with the highest fish consumption per capita (2019: 59.91 kg year-1). Since limited information is available on the effective levels of mercury after culinary treatments, cooked and raw codfish (Gadus morhua), hake (Merluccius merluccius), octopus (Octopus vulgaris), horse mackerel (Trachurus trachurus) and sardine (Sardina pilchardus) were considered. The mercury concentration ranking Hake > Horse mackerel > Codfish > Octopus > Sardine was observed in all situations (cooked and raw samples) for both MeHg and total mercury (T-Hg). The gathered results reinforce the general assumption that the loss of moisture during cooking increases MeHg and T-Hg concentrations in fish, but the idea that MeHg in fish muscle tissue represents the bulk of T-Hg cannot be generalised, as our study determined a MeHg/T-Hg ratio of 0.43 for grilled sardines.
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Affiliation(s)
- Elsa T Rodrigues
- Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal.
| | - João P Coelho
- Department of Biology and CESAM and ECOMARE, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal.
| | - Eduarda Pereira
- Department of Chemistry and CESAM/REQUIMTE, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal.
| | - Miguel A Pardal
- Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal.
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2
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Kozaki D, Mori M, Hamasaki S, Doi T, Tanihata S, Yamamoto A, Takahashi T, Sakamoto K, Funado S. Simple mercury determination using an enclosed quartz cell with cold vapour-atomic absorption spectrometry. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2021; 13:1106-1109. [PMID: 33569554 DOI: 10.1039/d0ay02232b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
A simple method for determining total inorganic mercury (Hg) in solution using an enclosed quartz cell applying cold vapour-atomic absorption spectrometry (CV-AAS) can reduce sample volume, reductant, and cost compared with those of official methods. The Hg determination under the optimised conditions achieves precision similar to that of conventional CV-AAS.
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Affiliation(s)
- Daisuke Kozaki
- Department of Chemistry and Biotechnology, Graduate School of Science and Technology, Kochi University, 2-5-1 Akebono-cho, Kochi City, Kochi 780-8520, Japan.
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3
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Haraguchi K, Sakamoto M, Matsuyama A, Yamamoto M, Hung DT, Nagasaka H, Uchida K, Ito Y, Kodamatani H, Horvat M, Chan HM, Rand M, Cirtiu CM, Kim BG, Nielsen F, Yamakawa A, Mashyanov N, Panichev N, Panova E, Watanabe T, Kaneko N, Yoshinaga J, Herwati RF, Suoth AE, Akagi H. Development of Human Hair Reference Material Supporting the Biomonitoring of Methylmercury. ANAL SCI 2020; 36:561-567. [PMID: 32147632 DOI: 10.2116/analsci.19sbp07] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A certified reference material, NIMD-01, was developed for the analysis of mercury speciation in human hair. We collected the hair of Vietnamese males from a barbershop in Hanoi in 2016 and prepared 1200 bottles containing 3 g of sieved and blended hair powder. The certified value was given on a dry-mass basis, with the moisture content obtained by drying at 85°C for 4 h. Certified values with the expanded uncertainties (coverage factor, k = 2) were as follows: methylmercury, 0.634 ± 0.071 mg kg-1 as mercury; total mercury, 0.794 ± 0.050 mg kg-1; copper, 12.8 ± 1.4 mg kg-1; zinc, 234 ± 29 mg kg-1; selenium, 1.52 ± 0.29 mg kg-1. An indicative arsenic concentration of 0.17 ± 0.03 mg kg-1 was measured. Extended uncertainties were estimated by sample homogeneity, long- and short-term stabilities, and a characterization from measurements made by collaborating laboratories.
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Affiliation(s)
- Koichi Haraguchi
- Department of International Affairs and Research, National Institute for Minamata Disease
| | - Mineshi Sakamoto
- Department of Environment and Public Health, National Institute for Minamata Disease
| | - Akito Matsuyama
- Department of International Affairs and Research, National Institute for Minamata Disease
| | - Megumi Yamamoto
- Department of Environment and Public Health, National Institute for Minamata Disease
| | - Dang T Hung
- Laboratory Center, Hanoi University of Public Health
| | | | - Keisuke Uchida
- Institute of Environmental Ecology, IDEA Consultants, Inc
| | - Yasunori Ito
- Institute of Environmental Ecology, IDEA Consultants, Inc
| | | | - Milena Horvat
- Department of Environmental Sciences, Jozef Stefan Institute
| | | | - Matthew Rand
- Department of Environmental Medicine, University of Rochester School of Medicine and Dentistry
| | - Ciprian M Cirtiu
- Centre de Toxicologie du Quebec, Institut National de Santé Publique du Quebec
| | - Byoung-Gwon Kim
- Department of Preventive Medicine, College of Medicine, Dong-A University
| | | | - Akane Yamakawa
- Center for Environmental Measurement and Analysis, National Institute for Environmental Studies
| | | | | | - Elena Panova
- Institute of the Earth Sciences, St. Petersburg University
| | | | | | | | | | - Alfrida E Suoth
- Research and Development for Environmental Quality and Laboratory Center, MOEF
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4
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He C, Arizono K, Ji H, Yakushiji Y, Zhang D, Huang K, Ishibashi Y. Spatial distribution characteristics of mercury in the soils and native earthworms (Bimastos parvus) of the leachate-contaminated zone around a traditional landfill. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 636:1565-1576. [PMID: 29913617 DOI: 10.1016/j.scitotenv.2018.04.259] [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: 02/05/2018] [Revised: 03/31/2018] [Accepted: 04/20/2018] [Indexed: 06/08/2023]
Abstract
The contents and spatial distribution of mercury (Hg), including soil-Hg fractionation and Hg-containing native earthworm Bimastos parvus (B. parvus) species, were investigated in the leachate-contaminated zone of a large traditional landfill, Japan. Soil-Hg was fractionated into 5 categories: F1/water soluble Hg (Hg-w), F2/human stomach acid soluble Hg (Hg-h), F3/organic-chelated (Hg-o), F4/elemental Hg (Hg-e), and F5/mercuric sulfide (Hg-s). The total mercury (T-Hg) and methylmercury (MeHg) of native B. parvus, and the geochemical properties of soils were examined in this study. Soil T-Hg concentration ranged between 0.227 and 2.919 mg kg-1 dry weight (dw). The T-Hg and MeHg concentrations of B. parvus species ranged from 1.242 to 6.775 mg kg-1 dw and from 0.031 to 0.218 mg kg-1 dw, respectively. Percentages of soil-Hg fractions were in the order of F3/Hg-o > F4/ Hg-e > F5/Hg-s > F1/Hg-w > F2/Hg-h, and the fractions of Hg-o and Hg-e were 55.50% and 35.31%, respectively. Similar distributions and close correlations between the levels of B. parvus Hg and soil Hg-o, Hg-e, and Hg-s were observed in this study. The distribution of Hg in B. parvus was associated with soil organic matter (SOM) content and particle size (sand, clay); however, it was not correlated with Hg-w or Hg-h. The results indicated that easily bioavailable and soluble Hg fractions (Hg-w, Hg-h) of the soil were not appropriate to illustrate the distribution of Hg in native B. parvus. Instead, the stable soil-Hg fractions (Hg-o, Hg-e, and Hg-s) demonstrated good relationships of spatial distribution with B. parvus Hg in leachate-contaminated soil. It is advisable to preclude the evaluation of Hg biological distribution using soluble Hg fractions only. Stable Hg fractions in leachate-contaminated soil should also be included for assessing the biological distribution of Hg in leachate-contaminated soils.
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Affiliation(s)
- Changhua He
- Faculty of Environmental & Symbiotic Sciences, Prefectural University of Kumamoto, 3-1-100, Tsukide, Higashi-ku, Kumamoto, 862-8502, Japan; Hainan Provincial Center for Disease Control and Prevention, No.44, Haifu Road, Longhua district, Haikou city, Hainan Province, China
| | - Koji Arizono
- Faculty of Environmental & Symbiotic Sciences, Prefectural University of Kumamoto, 3-1-100, Tsukide, Higashi-ku, Kumamoto, 862-8502, Japan
| | - Hezhe Ji
- Price Management of Japan Co., Ltd., 1-8, Hibikino, Wakamatsu-ku, Kitakyushu-shi, Fukuoka 808-0135, Japan
| | - Yuka Yakushiji
- Faculty of Environmental & Symbiotic Sciences, Prefectural University of Kumamoto, 3-1-100, Tsukide, Higashi-ku, Kumamoto, 862-8502, Japan
| | - Daizhou Zhang
- Faculty of Environmental & Symbiotic Sciences, Prefectural University of Kumamoto, 3-1-100, Tsukide, Higashi-ku, Kumamoto, 862-8502, Japan
| | - Kuangwei Huang
- Faculty of Environmental & Symbiotic Sciences, Prefectural University of Kumamoto, 3-1-100, Tsukide, Higashi-ku, Kumamoto, 862-8502, Japan
| | - Yasuhiro Ishibashi
- Faculty of Environmental & Symbiotic Sciences, Prefectural University of Kumamoto, 3-1-100, Tsukide, Higashi-ku, Kumamoto, 862-8502, Japan.
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5
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Yamamoto M, Motomura E, Yanagisawa R, Hoang VAT, Mogi M, Mori T, Nakamura M, Takeya M, Eto K. Evaluation of neurobehavioral impairment in methylmercury-treated KK-Ay mice by dynamic weight-bearing test. J Appl Toxicol 2018; 39:221-230. [PMID: 30175511 DOI: 10.1002/jat.3710] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 06/21/2018] [Accepted: 07/11/2018] [Indexed: 12/22/2022]
Abstract
Methylmercury (MeHg) is known to cause neurobehavioral impairment in human and experimental animals. We previously reported that MeHg (5 mg Hg/kg) induced severe neurobehavioral dysfunction in 4-week-old KK-Ay mice, although it is difficult to evaluate quantitatively the neurobehavioral impairment in MeHg-treated KK-Ay mice because of their obesity. The aim of this study was to evaluate MeHg-induced neurobehavioral dysfunction in KK-Ay mice using the dynamic weight-bearing test, which analyzes the animal's weight distribution between the four limbs. Male 12-week-old KK-Ay mice were treated with MeHg (5 mg Hg/kg) three times per week for 5 weeks. Body weight loss began after approximately 2 weeks of MeHg treatment, and decreased significantly at 4 weeks. Seven of the nine MeHg-treated mice exhibited overt neurological symptoms such as ataxia and gait disturbance. The weight-bearing load was lower for the forelimb than for the hindlimb at baseline and until 1 week after MeHg treatment was initiated. In weeks 2-4, the dynamic weight-bearing loads on the forelimb and hindlimb were similar. The load on the forelimb exceeded the load on the hindlimb after 5 weeks of treatment. This finding indicates that the dynamic weight-bearing test is useful for semi-quantitative evaluation of neurobehavioral impairment in MeHg-treated rodents, and is less stressful for the animals. Infiltration of CD204-positive macrophages was observed in the sciatic nerve of MeHg-treated mice, suggesting that CD204 can serve as a useful marker of tissue injury in peripheral nerves and a possible target in regenerating peripheral nerves and controlling neuropathies.
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Affiliation(s)
- Megumi Yamamoto
- Integrated Physiology Section, Department of Basic Medical Science, National Institute for Minamata Disease, 4058-18 Hama, Minamata, Kumamoto, 867-0008, Japan
| | - Eriko Motomura
- Integrated Physiology Section, Department of Basic Medical Science, National Institute for Minamata Disease, 4058-18 Hama, Minamata, Kumamoto, 867-0008, Japan
| | - Rie Yanagisawa
- Center for Health and Environmental Risk Research, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki, 305-8506, Japan
| | - Van Anh Thi Hoang
- Integrated Physiology Section, Department of Basic Medical Science, National Institute for Minamata Disease, 4058-18 Hama, Minamata, Kumamoto, 867-0008, Japan.,Graduate School of Environmental and Symbiotic Science, Prefectural University of Kumamoto, 3-1-100 Tsukide, Higashi-ku, Kumamoto, 862-8502, Japan
| | - Masaki Mogi
- Department of Pharmacology, Ehime University Graduate School of Medicine, Ehime, 791-0295, Japan
| | - Tomohisa Mori
- Department of Pharmacology, Hoshi University School of Pharmacy and Pharmaceutical Sciences, Tokyo, 142-8501, Japan
| | - Masaaki Nakamura
- Department of Clinical Medicine, National Institute for Minamata Disease, 4058-18 Hama, Minamata, Kumamoto, 867-0008, Japan
| | - Motohiro Takeya
- Department of Cell Pathology, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Komyo Eto
- Health and Nursing Facilities for the Aged, Jushindai, Shinwakai, 272 Ikurakitakata, Tamana, Kumamoto, 865-0041, Japan
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6
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Comparative Screening Analytic Methods for Elderly of Blood Methylmercury Concentration between Two Analytical Institutions. COMPUTATIONAL AND MATHEMATICAL METHODS IN MEDICINE 2018; 2018:2509413. [PMID: 30046350 PMCID: PMC6038686 DOI: 10.1155/2018/2509413] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Revised: 04/23/2018] [Accepted: 05/30/2018] [Indexed: 11/17/2022]
Abstract
Methylmercury is widely known to be a toxic substance in the human, especially a nervous system. However, it is difficult to accurately measure the amount of methylmercury in blood, and the form of methylmercury is variously presented. The purpose of study was to compare the total mercury and methylmercury measurements techniques and detection levels between analytical institutions in two countries using the same elderly human blood samples. Total mercury using gold amalgamation direct mercury analysis method (both) and methylmercury using the dithizone extraction and gas chromatography-electron capture detector (GC-ECD) method (N Lab in Japan) and the cold vapor atomic fluorescence spectrophotometer (CVAFS) method (D Lab in Korea) were measured in 47 subjects who agreed to participate in this study. Total mercury concentrations in both analytical laboratories were observed at similar levels (9.4 versus 9.5 ug/kg, p=0.898) and the distribution was highly correlated. However, the concentration of methylmercury showed some difference between two laboratories (9.1 versus 8.6 ug/kg, p<0.001). Due to different recovery rates by different analytical methods, it is assumed that the methyl/total mercury ratio in N lab in Japan was higher than D lab in Korea (96.8 versus 90.4%, p<0.001). The GC-ECD was more sensitive method than CVAFS in methylmercury analytic techniques.
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7
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He C, Arizono K, Ji H, Yakushiji Y, Zhang D, Huang K, Ishibashi Y. Comparison of mercury and methylmercury bioaccumulation in earthworms ( Bimastus parvus) native to landfill-leachate-contaminated forest soil. J Toxicol Sci 2018; 43:459-471. [DOI: 10.2131/jts.43.459] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- Changhua He
- Faculty of Environmental & Symbiotic Sciences, Prefectural University of Kumamoto
- Hainan Provincial Center for Disease Control and Prevention, China
| | - Koji Arizono
- Faculty of Environmental & Symbiotic Sciences, Prefectural University of Kumamoto
| | - Hezhe Ji
- Price Management of Japan Co., Ltd
| | - Yuka Yakushiji
- Faculty of Environmental & Symbiotic Sciences, Prefectural University of Kumamoto
| | - Daizhou Zhang
- Faculty of Environmental & Symbiotic Sciences, Prefectural University of Kumamoto
| | - Kuangwei Huang
- Faculty of Environmental & Symbiotic Sciences, Prefectural University of Kumamoto
| | - Yasuhiro Ishibashi
- Faculty of Environmental & Symbiotic Sciences, Prefectural University of Kumamoto
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8
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Yoshimoto K, Anh HTV, Yamamoto A, Koriyama C, Ishibashi Y, Tabata M, Nakano A, Yamamoto M. Simple analysis of total mercury and methylmercury in seafood using heating vaporization atomic absorption spectrometry. J Toxicol Sci 2017; 41:489-500. [PMID: 27432235 DOI: 10.2131/jts.41.489] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
This study aimed to develop a simpler method for determining total mercury (T-Hg) and methylmercury (MeHg) in biological samples by using methyl isobutyl ketone (MIBK) in the degreasing step. The fat in the samples was extracted by MIBK to the upper phase. T-Hg transferred into the water phase. This was followed by the extraction of MeHg from the water phase using HBr, CuCl2 and toluene. The MeHg fraction was reverse-extracted into L-cysteine-sodium acetate solution from toluene. The concentrations of T-Hg and MeHg were determined by heating vaporization atomic absorption spectrometry. Certified reference materials for T-Hg and MeHg in hair and fish were accurately measured using this method. This method was then applied to determine T-Hg and MeHg concentrations in the muscle, liver and gonads of seafood for the risk assessment of MeHg exposure. The mean T-Hg and MeHg concentrations in squid eggs were 0.023 and 0.022 µg/g, and in squid nidamental glands 0.052 and 0.049 µg/g, respectively. The MeHg/T-Hg ratios in the eggs and nidamental glands of squid were 94.4% and 96.5%, respectively. The mean T-Hg and MeHg concentrations in the gonads of sea urchins were 0.043 and 0.001 µg/g, respectively, with a MeHg/T-Hg ratio of 3.5%. We developed an efficient analytical method for T-Hg and MeHg using MIBK in the degreasing step. The new information on MeHg concentration and MeHg/T-Hg ratios in the egg or nidamental glands of squid and gonads of sea urchin will also be useful for risk assessment of mercury in seafood.
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Affiliation(s)
- Keisuke Yoshimoto
- Department of Basic Medical Science, National Institute for Minamata Disease
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9
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Hoang VAT, Do HTT, Agusa T, Koriyama C, Akiba S, Ishibashi Y, Sakamoto M, Yamamoto M. Hair mercury levels in relation to fish consumption among Vietnamese in Hanoi. J Toxicol Sci 2017; 42:651-662. [DOI: 10.2131/jts.42.651] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- Van Anh Thi Hoang
- Department of Basic Medical Science, National Institute for Minamata Disease
- Graduate School of Environmental and Symbiotic Science, Prefectural University of Kumamoto
| | - Hien Thu Thi Do
- General Planning Department, National Hospital of Dermatology and Venereology, Vietnam
| | - Tetsuro Agusa
- Graduate School of Environmental and Symbiotic Science, Prefectural University of Kumamoto
| | - Chihaya Koriyama
- Department of Epidemiology and Preventive Medicine, Kagoshima University Graduate School of Medical and Dental Sciences
| | - Suminori Akiba
- Department of Epidemiology and Preventive Medicine, Kagoshima University Graduate School of Medical and Dental Sciences
| | - Yasuhiro Ishibashi
- Graduate School of Environmental and Symbiotic Science, Prefectural University of Kumamoto
| | - Mineshi Sakamoto
- Department of Environmental Science and Epidemiology, National Institute for Minamata Disease
| | - Megumi Yamamoto
- Department of Basic Medical Science, National Institute for Minamata Disease
- Graduate School of Environmental and Symbiotic Science, Prefectural University of Kumamoto
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10
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Hoang VAT, Sakamoto M, Yamamoto M. Mercury and selenium levels, and their molar ratios in several species of commercial shrimp in Japan regarding the health risk of methylmercury exposure. J Toxicol Sci 2017; 42:509-517. [DOI: 10.2131/jts.42.509] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- Van Anh Thi Hoang
- Department of Basic Medical Science, National Institute for Minamata Disease
- Graduate School of Environmental and Symbiotic Science, Prefectural University of Kumamoto
| | - Mineshi Sakamoto
- Department of Environmental Science and Epidemiology, National Institute for Minamata Disease
| | - Megumi Yamamoto
- Department of Basic Medical Science, National Institute for Minamata Disease
- Graduate School of Environmental and Symbiotic Science, Prefectural University of Kumamoto
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Teraoka H, Okamoto E, Kudo M, Nakayama SMM, Ikenaka Y, Ishizuka M, Endo T, Kitazawa T, Hiraga T. Accumulation properties of inorganic mercury and organic mercury in the red-crowned crane Grus japonensis in east Hokkaido, Japan. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2015; 122:557-564. [PMID: 26432029 DOI: 10.1016/j.ecoenv.2015.09.025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Revised: 09/14/2015] [Accepted: 09/15/2015] [Indexed: 06/05/2023]
Abstract
The red-crowned (Japanese) crane Grus japonensis is native to east Hokkaido, Japan, in contrast to the East Asia mainland. Previously, we reported that red-crowned cranes in Hokkaido were highly contaminated with mercury in the 1990s and that the contamination rapidly decreased to a moderate level in the 2000s. In the present study, we determined levels of organic mercury (O-Hg) in the liver and kidney of cranes in east Hokkaido in comparison with levels of total mercury (T-Hg). T-Hg levels in the kidneys were higher than those in the livers in adults but not in subadults and juveniles; however, the reverse was the case for O-Hg even for adults. The ratio of O-Hg to T-Hg in both the liver and kidney decreased as T-Hg increased in the three developmental stages. While the ratios of O-Hg to T-Hg in the liver and kidney of adults were significantly lower than those of juveniles, the ratios were similar for adults and juveniles in a lower range of T-Hg. The ratio of selenium (Se) to T-Hg decreased as T-Hg increased in both the liver and kidney, irrespective of stages. Mercury burdens in feathers were about 59% and 67% of the total body burdens for juveniles and adults, respectively. Furthermore, ratios of carbon and nitrogen stable isotopes to T-Hg varied greatly, with no relation to mercury level in the liver. The results suggest slow accumulation of inorganic mercury in the kidney of red-crowned cranes in east Hokkaido, Japan.
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Affiliation(s)
- Hiroki Teraoka
- School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu 069-8501, Japan.
| | - Erika Okamoto
- School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu 069-8501, Japan.
| | - Moe Kudo
- School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu 069-8501, Japan.
| | - Shouta M M Nakayama
- Laboratory of Toxicology, Department of Environmental Veterinary Science, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo 060-0818, Japan.
| | - Yoshinori Ikenaka
- Laboratory of Toxicology, Department of Environmental Veterinary Science, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo 060-0818, Japan; Water Research Group, Unit for Environmental Sciences and Management, North-West University, Potchefstroom, South Africa.
| | - Mayumi Ishizuka
- Laboratory of Toxicology, Department of Environmental Veterinary Science, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo 060-0818, Japan.
| | - Tetsuya Endo
- School of Pharmaceutical Sciences, Health Sciences University of Hokkaido, 1757 Ishikari-Tobetsu, Hokkaido 061-0293, Japan.
| | - Takio Kitazawa
- School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu 069-8501, Japan.
| | - Takeo Hiraga
- School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu 069-8501, Japan.
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12
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Mok W, Hatanaka Y, Seoka M, Itoh T, Tsukamasa Y, Ando M. Effects of additional cysteine in fish diet on mercury concentration. Food Chem 2014; 147:340-5. [DOI: 10.1016/j.foodchem.2013.09.157] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2013] [Revised: 07/31/2013] [Accepted: 09/30/2013] [Indexed: 10/26/2022]
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13
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Mok WJ, Senoo S, Itoh T, Tsukamasa Y, Kawasaki KI, Ando M. Assessment of concentrations of toxic elements in aquaculture food products in Malaysia. Food Chem 2012. [DOI: 10.1016/j.foodchem.2012.02.011] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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