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Rodríguez-Viso P, Domene A, Sánchez A, Vélez D, Monedero V, Devesa V, Zúñiga M. Challenges and strategies for preventing intestinal damage associated to mercury dietary exposure. Toxicology 2023; 494:153580. [PMID: 37328091 DOI: 10.1016/j.tox.2023.153580] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Revised: 06/02/2023] [Accepted: 06/12/2023] [Indexed: 06/18/2023]
Abstract
Food represents the major risk factor for exposure to mercury in most human populations. Therefore, passage through the gastrointestinal tract plays a fundamental role in its entry into the organism. Despite the intense research carried out on the toxicity of Hg, the effects at the intestinal level have received increased attention only recently. In this review we first provide a critical appraisal of the recent advances on the toxic effects of Hg at the intestinal epithelium. Next, dietary strategies aimed to diminish Hg bioavailability or modulate the epithelial and microbiota responses will be revised. Food components and additives, including probiotics, will be considered. Finally, limitations of current approaches to tackle this problem and future lines of research will be discussed.
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Affiliation(s)
| | - Adrián Domene
- Instituto de Agroquímica y Tecnología de Alimentos (IATA-CSIC), Paterna, Spain
| | - Alicia Sánchez
- Instituto de Agroquímica y Tecnología de Alimentos (IATA-CSIC), Paterna, Spain
| | - Dinoraz Vélez
- Instituto de Agroquímica y Tecnología de Alimentos (IATA-CSIC), Paterna, Spain
| | - Vicente Monedero
- Instituto de Agroquímica y Tecnología de Alimentos (IATA-CSIC), Paterna, Spain
| | - Vicenta Devesa
- Instituto de Agroquímica y Tecnología de Alimentos (IATA-CSIC), Paterna, Spain
| | - Manuel Zúñiga
- Instituto de Agroquímica y Tecnología de Alimentos (IATA-CSIC), Paterna, Spain.
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Tang W, Chu J, Zhong H. Alkaline extraction: An optimal approach for extracting methylmercury from paddy soils. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 885:163776. [PMID: 37149159 DOI: 10.1016/j.scitotenv.2023.163776] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 04/23/2023] [Accepted: 04/23/2023] [Indexed: 05/08/2023]
Abstract
Accurately measuring the concentration of methylmercury (MeHg) is a critical part of Hg research. While analytical methods of MeHg have not been validated for paddy soils, which are one of the most important and active sites of MeHg production. Here we compared two methods most widely used to extract MeHg from paddy soils, i.e., CuSO4/KBr/H2SO4-CH2Cl2 (referred to as acid extraction) and KOH-CH3OH (referred to as alkaline extraction). By evaluating the formation of MeHg artifact using Hg isotope amendments and quantifying the extraction efficiency using the standard spike in 14 paddy soils, we propose that alkaline extraction is an optimal choice for paddy soils, with negligible MeHg artifact (accounting for 0.62-8.11 % of the background MeHg) and consistently high extraction efficiency (81.4-114.6 % for alkaline extraction compared with 21.3-70.8 % for acid extraction). Our finding highlights the importance of suitable pretreatment and appropriate quality controls during the measurement of MeHg concentrations.
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Affiliation(s)
- Wenli Tang
- School of the Environment, Nanjing University, State Key Laboratory of Pollution Control and Resource Reuse, Nanjing 210023, China
| | - Junru Chu
- School of the Environment, Nanjing University, State Key Laboratory of Pollution Control and Resource Reuse, Nanjing 210023, China
| | - Huan Zhong
- School of the Environment, Nanjing University, State Key Laboratory of Pollution Control and Resource Reuse, Nanjing 210023, China; Environmental and Life Sciences Program (EnLS), Trent University, Peterborough, Ontario K9L 0G2, Canada.
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Huang ZL, Yang ZB, Xu XX, Lei YJ, He JS, Yang S, Wong MH, Man YB, Cheng Z. Health risk assessment of mercury in Nile tilapia (Oreochromis niloticus) fed housefly maggots. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 852:158164. [PMID: 36055489 DOI: 10.1016/j.scitotenv.2022.158164] [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: 06/16/2022] [Revised: 08/04/2022] [Accepted: 08/16/2022] [Indexed: 06/15/2023]
Abstract
The bioaccumulation of total mercury (THg) and methylmercury (MeHg) by housefly maggots (HM) during the conversion of food waste (vegetables and meat (VM) and rice waste) under various waste feed ratios were investigated. Subsequently, Nile tilapia (Oreochromis niloticus) were fed with the commercial feed, commercial dried HM, dried HM, and fresh HM, followed by a human health risk assessment of Hg via fish consumption. The THg concentrations of HM fed with food waste ranged from 39.5 to 100 μg kg-1 ww. Concentrations of MeHg in the maggots fed with 100 % vegetables and meat (VM) waste (13.7 ± 1.12 μg kg-1 ww) was significantly higher than that fed with other mixed ratios of rice waste and VM waste (p<0.05). Concentrations of MeHg were positively correlated with the weight and lipid content of houseflies (p<0.05). THg and MeHg concentrations in tilapia fed with the converted HM (dried and fresh HM) were 22.5 ± 6.50 μg kg-1 ww and 2.43 ± 0.36 μg kg-1 ww, respectively. There was no significant difference in MeHg between tilapia fed the four experiment diets (p>0.05). Health risk assessment results indicated that mercury in tilapia fed the food waste-grown HM did not pose potential health risks to humans (target hazard quotient < 1). In conclusion, HM could convert food waste into high-quality and safe fish feeds for cultivating tilapia.
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Affiliation(s)
- Zhong-Li Huang
- College of Environment, Sichuan Agricultural University, Chengdu, China
| | - Zhan-Biao Yang
- College of Environment, Sichuan Agricultural University, Chengdu, China
| | - Xiao-Xun Xu
- College of Environment, Sichuan Agricultural University, Chengdu, China
| | - Yong-Jia Lei
- College of Environment, Sichuan Agricultural University, Chengdu, China
| | - Jin-Song He
- College of Environment, Sichuan Agricultural University, Chengdu, China
| | - Song Yang
- College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, China
| | - Ming Hung Wong
- Consortium on Health, Environment, Education, and Research (CHEER), and Department of Science and Environmental Studies, The Education University of Hong Kong, Tai Po, Hong Kong, China
| | - Yu-Bon Man
- Consortium on Health, Environment, Education, and Research (CHEER), and Department of Science and Environmental Studies, The Education University of Hong Kong, Tai Po, Hong Kong, China.
| | - Zhang Cheng
- College of Environment, Sichuan Agricultural University, Chengdu, China.
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Zhang Z, Zhang X, Xin Y, Wu H. Ant colonization increased total mercury but reduced methylmercury contents in boreal mires, Northeast China. J Environ Sci (China) 2022; 119:50-58. [PMID: 35934465 DOI: 10.1016/j.jes.2021.12.007] [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: 07/25/2021] [Revised: 12/08/2021] [Accepted: 12/09/2021] [Indexed: 06/15/2023]
Abstract
Soil macroinvertebrates as ecosystem engineers play significant, but largely ignored, roles in affecting mercury (Hg) cycle by altering soil physical-chemical properties. Ant is likely expanded into boreal mires with climate warming, however, its impacts on Hg cycle remained poorly understood. We compared total Hg (THg) and methylmercury (MeHg) contents in soils from antmounds (Lasius flavus) and the nearby ambient in a boreal mire in Northeast China. The present work seeks to unravel factors that controlling MeHg levels in case of ant appearance or absence. The average THg was 179 µg/kg in the ant mound and was 106.1 µg/kg in nearby soils, respectively. The average MeHg was 10.9 µg/kg in the ant mound and was 12.9 µg/kg in nearby soils, respectively. The ratios of MeHg to THg (%MeHg) were 7.61% in ant mounds and 16.75% in nearby soils, respectively. Ant colonization caused THg enrichment and MeHg depletion, and this change was obvious in the 10-20 cm depth soil layer where ants mainly inhabited. Spectrometry characteristics of soil dissolved organic matter (DOM) exert a stronger control than microorganisms on MeHg variation in soils. A structural equation model revealed that the molecular weight of DOM inhibited MeHg irrespective of ant presence or absence, while humification conducive to MeHg significantly in ant mound soils. Microorganisms mainly affected Hg methylation by altering the molecular weight and humification of DOM. We propose that the effects of ant colonization on MeHg rested on DOM feature variations caused by microorganisms in boreal mires.
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Affiliation(s)
- Zhongsheng Zhang
- Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130012, China.
| | - Xuehui Zhang
- Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130012, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yuan Xin
- Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130012, China; Shengyang University, Shenyang 110044, China
| | - Haitao Wu
- Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130012, China
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Abadia LEM, Gomes AR, Freitas ÍN, Guimarães ATB, Vaz BG, Ahmed MAI, Luz TMD, Rodrigues ASDL, Malafaia G. Hazardous effects of road-side soils on the redox and cholinesterasic homeostasis of mound-building termite (Cornitermes cumulans). THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 815:152841. [PMID: 34995615 DOI: 10.1016/j.scitotenv.2021.152841] [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: 11/29/2021] [Revised: 12/28/2021] [Accepted: 12/28/2021] [Indexed: 06/14/2023]
Abstract
For our knowledge, the roadside soils end up being the deposit of various residues discarded by drivers or passengers, plus, that coming from the runoff of rainwater. Basically, we do not know the impacts that this pollution causes on animals which inhabit these environments. Thus, in this study, our objective was to evaluate how the presence of plastic microfibers (MPFs), organic compounds and heavy metals affect the redox and cholinesterase homeostasis of mound-building termite [Cornitermes cumulans (workers) adults]. As a result, we noticed that MPFs were present in all sampled areas, being higher in road area (RA). Regardless of the presence of these pollutants, animals sampled in the RA were those in which we observed greater production of reactive oxygen species (ROS), hydrogen peroxide (H2O2) and nitric oxide (NO) (via nitrite), whose higher activities of antioxidant enzymes, superoxide dismutase (SOD) and catalase (CAT), was not able to counterbalance the oxidative stress suggested by the evaluated biomarkers. Moreover, we observed increase in acetylcholinesterase (AChE) activity in these same animals, which suggests a cholinesterasic effect. Such alterations were positively correlated with the contamination of soil samples by Cd, Pb, Zn, Fe and Cu, as well as with the presence of the 11,10-guaiane-type sesquiterpenoid compound, identified only in the RA. Thus, our unique study reveals that the contamination of roadside soils constitutes an additional environmental stressor to populations of C. cumulans, which reinforces the need for greater attention and further investigation to be given to the pollution of these environments.
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Affiliation(s)
- Lucas Eduardo Moreira Abadia
- Biological Research Laboratory, Post-graduation Program in Conservation of Cerrado Natural Resources, Goiano Federal Institute, Urataí Campus, GO, Brazil
| | - Alex Rodrigues Gomes
- Post-graduation Program in Agrarian Science, Goiano Federal Institute, Rio Verde Campus, GO, Brazil
| | - Ítalo Nascimento Freitas
- Biological Research Laboratory, Post-graduation Program in Conservation of Cerrado Natural Resources, Goiano Federal Institute, Urataí Campus, GO, Brazil
| | - Abraão Tiago Batista Guimarães
- Post-graduation Program in Biotechnology and Biodiversity, Goiano Federal Institution, Federal University of Goiás, GO, Brazil
| | | | | | - Thiarlen Marinho da Luz
- Biological Research Laboratory, Post-graduation Program in Conservation of Cerrado Natural Resources, Goiano Federal Institute, Urataí Campus, GO, Brazil
| | - Aline Sueli de Lima Rodrigues
- Biological Research Laboratory, Post-graduation Program in Conservation of Cerrado Natural Resources, Goiano Federal Institute, Urataí Campus, GO, Brazil
| | - Guilherme Malafaia
- Biological Research Laboratory, Post-graduation Program in Conservation of Cerrado Natural Resources, Goiano Federal Institute, Urataí Campus, GO, Brazil; Post-graduation Program in Biotechnology and Biodiversity, Goiano Federal Institution, Federal University of Goiás, GO, Brazil; Post-graduation Program in Ecology and Conservation of Natural Resources, Federal University of Uberlândia, MG, Brazil.
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Carvalho GOD, Meire RO, Lino AS, Yogui DR, Desbiez ALJ, Torres JPM, Malm O. Biomonitoring mercury contamination using fur from roadkilled giant anteaters. CHEMOSPHERE 2021; 270:128644. [PMID: 33121800 DOI: 10.1016/j.chemosphere.2020.128644] [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: 05/31/2020] [Revised: 10/04/2020] [Accepted: 10/13/2020] [Indexed: 06/11/2023]
Abstract
The giant anteater (Myrmecophaga tridactyla) can occur in both preserved and anthropogenic environments in Brazilian biomes. The Cerrado biome, where the samples were collected, is considered one of the world's biodiversity hotspots; however, a large part of it has been converted to pasture and agricultural land. In this environment, animals may be exposed to contaminants, such as mercury (Hg). Despite its immense biodiversity, there are few studies investigating Hg contamination in terrestrial mammals in Brazil. This study aimed to create a baseline for Hg levels in giant anteater fur and establish which biotic and abiotic variables can influence its concentration. Total Hg (THg) concentrations were determined by cold vapor atomic absorption spectrometry in 141 individuals sampled on highways between January and October 2017, in the state of Mato Grosso do Sul, Brazil. THg concentrations in fur ranged from 0.27 to 4.77 μg g -1. The decomposition stage of the carcasses and vehicular traffic volume on highways did not influence the THg concentrations. Juveniles presented lower THg concentrations than adults. A spatial pattern of higher concentrations in the eastern-southeastern region of the state was found, which could be related to anthropogenic impacts; however, no clear links have been established. The THg concentrations in giant anteaters' fur seems higher than expected considering the trophic position of the species. Despite this, the range was in accordance with studies of other Brazilian terrestrial mammals and within safe threshold levels. This study indicates the potential of utilizing roadkilled fauna to monitor large-scale contamination in wildlife.
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Affiliation(s)
- Gabriel Oliveira de Carvalho
- Laboratório de Radioisótopos Eduardo Penna Franca, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal Do Rio de Janeiro (UFRJ), Avenida Carlos Chagas Filho, 373 - Bloco G - Subsolo - Sala G061, Cidade Universitária, CEP 21941-902, Rio de Janeiro, Brazil; SAGE - Núcleo Professor Rogério Valle de Produção Sustentável, Universidade Federal Do Rio de Janeiro (UFRJ), COPPE/UFRJ, Centro de Gestão Tecnológica - CT2 - Rua Moniz de Aragão, No.360 - Bloco 2, Ilha Do Fundão - Cidade Universitária, Rio de Janeiro, Brazil.
| | - Rodrigo Ornellas Meire
- Laboratório de Radioisótopos Eduardo Penna Franca, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal Do Rio de Janeiro (UFRJ), Avenida Carlos Chagas Filho, 373 - Bloco G - Subsolo - Sala G061, Cidade Universitária, CEP 21941-902, Rio de Janeiro, Brazil
| | - Adan Santos Lino
- Laboratório de Radioisótopos Eduardo Penna Franca, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal Do Rio de Janeiro (UFRJ), Avenida Carlos Chagas Filho, 373 - Bloco G - Subsolo - Sala G061, Cidade Universitária, CEP 21941-902, Rio de Janeiro, Brazil
| | - Débora Regina Yogui
- Instituto de Conservação de Animais Silvestres, Rua Afonso Lino Barbosa, 142, Chácara Cachoeira, Campo Grande, MS, CEP: 79040-290, Brazil; Nashville Zoo, 3777 Nolensville Pike, Nashville, TN, 37211, USA
| | - Arnaud Léonard Jean Desbiez
- Instituto de Conservação de Animais Silvestres, Rua Afonso Lino Barbosa, 142, Chácara Cachoeira, Campo Grande, MS, CEP: 79040-290, Brazil; The Royal Zoological Society of Scotland, Edinburgh Zoo, 134 Corstorphine Road, Edinburgh, EH12 6TS, United Kingdom
| | - João Paulo Machado Torres
- Laboratório de Radioisótopos Eduardo Penna Franca, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal Do Rio de Janeiro (UFRJ), Avenida Carlos Chagas Filho, 373 - Bloco G - Subsolo - Sala G061, Cidade Universitária, CEP 21941-902, Rio de Janeiro, Brazil
| | - Olaf Malm
- Laboratório de Radioisótopos Eduardo Penna Franca, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal Do Rio de Janeiro (UFRJ), Avenida Carlos Chagas Filho, 373 - Bloco G - Subsolo - Sala G061, Cidade Universitária, CEP 21941-902, Rio de Janeiro, Brazil
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Hossain KFB, Hosokawa T, Saito T, Kurasaki M. Amelioration of butylated hydroxytoluene against inorganic mercury induced cytotoxicity and mitochondrial apoptosis in PC12 cells via antioxidant effects. Food Chem Toxicol 2020; 146:111819. [PMID: 33091556 DOI: 10.1016/j.fct.2020.111819] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 09/21/2020] [Accepted: 10/13/2020] [Indexed: 12/14/2022]
Abstract
Mercury (Hg) is a toxic metal, well-known for its dangerous health effects on human. Butylated hydroxytoluene (BHT) is a phenolic component generally consumed as a food additive as an antioxidant. However, BHT induced antioxidant properties against heavy metals-influenced toxicity are little studied. We hypothesized that BHT has a regulatory effect on Hg-induced cytotoxicity. The objective of this research was to assess the protecting effects of BHT against inorganic Hg (iHg)-toxicity in PC12 cells, where cells were treated with/without HgCl2 (Hg2+) (5 μM) and BHT (100 μM) for 48 h and analyzed further. Cells treated by Hg caused a significant cell viability reduction, membrane damage, glutathione reduction, DNA fragmentation, ROS generation, with suppressed expressions of akt, mTOR, ERK1, Nrf2 and HO1; and elevated apoptotic expressions of p53, Bax, cytochrome c and active caspase 3. However, BHT and Hg2+ co-exposure showed prevention against Hg2+-toxicity by improving GSH content and inhibiting ROS generation and oxidative stress mediated damages. Additionally, BHT co-treatment inverted the pro-apoptotic proteins by augmenting pro-survival regulatory proteins akt, mTOR, ERK1, Nrf2 and HO1. These findings proved that BHT inhibits Hg2+-toxicity, hindering ROS generation and intrinsic apoptosis, via enhancing glutathione and antioxidants; and suggested BHT implications as therapeutic.
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Affiliation(s)
| | - Toshiyuki Hosokawa
- Institute for the Advancement of Higher Education, Hokkaido University, Sapporo 060-0817, Japan
| | - Takeshi Saito
- Faculty of Health Sciences, Hokkaido University, Sapporo 060-0812, Japan
| | - Masaaki Kurasaki
- Graduate School of Environmental Science, Hokkaido University, Sapporo 060-0810, Japan; Faculty of Environmental Earth Science, Hokkaido University, Sapporo 060-0810, Japan
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