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Feiler MO, Kulick ER, Sinclair K, Spiegel N, Habel S, Castello OG. Toxic metals and pediatric clinical immune dysfunction: A systematic review of the epidemiological evidence. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 927:172303. [PMID: 38599398 DOI: 10.1016/j.scitotenv.2024.172303] [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: 01/23/2024] [Revised: 04/05/2024] [Accepted: 04/05/2024] [Indexed: 04/12/2024]
Abstract
BACKGROUND Children are at high risk for exposure to toxic metals and are vulnerable to their effects. Significant research has been conducted evaluating the role of these metals on immune dysfunction, characterized by biologic and clinical outcomes. However, there are inconsistencies in these studies. The objective of the present review is to critically evaluate the existing literature on the association between toxic metals (lead, mercury, arsenic, and cadmium) and pediatric immune dysfunction. METHODS Seven databases (PubMed (NLM), Embase (Elsevier), CINAHL (Ebsco), Web of Science (Clarivate Analytics), ProQuest Public Health Database, and ProQuest Environmental Science Collection) were searched following Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines in February 2024. Rayaan software identified duplicates and screened by title and abstract in a blinded and independent review process. The remaining full texts were reviewed for content and summarized. Exclusions during the title, abstract, and full-text reviews included: 1) not original research, 2) not epidemiology, 3) did not include toxic metals, 4) did not examine an immune health outcome, or 5) not pediatric (>18 years). This systematic review protocol followed the PRISMA guidelines. Rayaan was used to screen records using title and abstract by two blinded and independent reviewers. This process was repeated for full-text article screening selection. RESULTS The search criteria produced 7906 search results; 2456 duplicate articles were removed across search engines. In the final review, 79 studies were included which evaluated the association between toxic metals and outcomes indicative of pediatric immune dysregulation. CONCLUSIONS The existing literature suggests an association between toxic metals and pediatric immune dysregulation. Given the imminent threat of infectious diseases demonstrated by the recent COVID-19 epidemic in addition to increases in allergic disease, understanding how ubiquitous exposure to these metals in early life can impact immune response, infection risk, and vaccine response is imperative.
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Affiliation(s)
- Marina Oktapodas Feiler
- Department of Epidemiology and Environmental Health, School of Public Health and Health Professions, University at Buffalo, United States of America; Department of Epidemiology and Biostatistics, College of Public Health, Temple University, United States of America.
| | - Erin R Kulick
- Department of Epidemiology and Biostatistics, College of Public Health, Temple University, United States of America
| | - Krystin Sinclair
- Department of Epidemiology and Biostatistics, College of Public Health, Temple University, United States of America
| | - Nitzana Spiegel
- Department of Epidemiology and Biostatistics, College of Public Health, Temple University, United States of America
| | - Sonia Habel
- Department of Epidemiology and Biostatistics, College of Public Health, Temple University, United States of America
| | - Olivia Given Castello
- Charles Library, Temple University Libraries, Temple University, United States of America
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Fadhila AN, Pramono BA, Muniroh M. Mercury and cadmium-induced inflammatory cytokines activation and its effect on the risk of preeclampsia: a review. REVIEWS ON ENVIRONMENTAL HEALTH 2023; 0:reveh-2023-0083. [PMID: 37978836 DOI: 10.1515/reveh-2023-0083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Accepted: 10/31/2023] [Indexed: 11/19/2023]
Abstract
During the last decade, there has been an increase in exposure to heavy metals that can affect human health and the environment, especially mercury (Hg) and cadmium (Cd). These exposures can pollute the rivers or oceans, then contaminating marine organisms. Humans as the last consumer of this food chain cycle can be a place for the bioaccumulation of Hg and Cd, especially for people living in coastal areas, including pregnant women. Exposure to heavy metals Hg and Cd can have a high risk of triggering blood vessel disorders, penetrating the blood-brain barrier (BBB) and the placental barrier, one of which can increase the risk of preeclampsia. Several immunological biomarkers such as some cytokines associated with Hg and Cd exposure are also involved in the pathophysiology of preeclampsia, which are the placental implantation process and endothelial dysfunction in pregnant women. Therefore, countries that have a high incidence of preeclampsia should be aware of the environmental factors, especially heavy metal pollution such as Hg and Cd.
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Affiliation(s)
- Alya N Fadhila
- Master Program of Biomedical Science, Faculty of Medicine, Diponegoro University, Semarang, Indonesia
| | - Besari A Pramono
- Department of Obstetrics and Gynecology, Faculty of Medicine, Diponegoro University, Semarang, Indonesia
| | - Muflihatul Muniroh
- Department of Physiology, Faculty of Medicine, Diponegoro University, Semarang, Indonesia
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Puente-Marin S, Hultman P, Ekstrand J, Nielsen JB, Havarinasab S. Secondary exposure to heavy metal in genetically susceptible mice leads to acceleration of autoimmune response. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2023; 104:104317. [PMID: 37984674 DOI: 10.1016/j.etap.2023.104317] [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: 05/08/2023] [Revised: 11/07/2023] [Accepted: 11/15/2023] [Indexed: 11/22/2023]
Abstract
Exposure to mercury (Hg) and silver (Ag) has been shown to induce autoimmune diseases in genetically susceptible rodents. Here, A.SW mice were initially exposed to HgCl2, AgNO3 or tap water (control) for 3 weeks. After 13 weeks of stoppage, all mice had secondary exposure to 203HgCl2. After secondary exposure, higher and earlier ANoA titers were observed in mice initially exposed to Hg or Ag compared to control. Further, mice initially exposed to Ag showed higher total IgG1 and IgG2a, Whole Body Retention and lymph nodes and spleen accumulation of Hg compared to mice initially exposed to Hg and controls. These findings showed an earlier and stronger immunological response in A.SW mice compared with control, following re-exposure to heavy metals indicating an immunological memory. Additionally, secondary exposure to a different heavy metal may aggravate the effects of exposure of at least one of the metals indicating cross-reactivity.
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Affiliation(s)
- Sara Puente-Marin
- Division of Inflammation and Infection (II), Department of Biomedical and Clinical Sciences, Linköping University, Linkoping, Sweden
| | - Per Hultman
- Division of Inflammation and Infection (II), Department of Biomedical and Clinical Sciences, Linköping University, Linkoping, Sweden
| | - Jimmy Ekstrand
- Division of Inflammation and Infection (II), Department of Biomedical and Clinical Sciences, Linköping University, Linkoping, Sweden
| | - Jesper Bo Nielsen
- Department of Public Health, Research Unit for General Practice, University of Southern Denmark, Odense, Denmark
| | - Said Havarinasab
- Division of Clinical Chemistry and Pharmacology (KKF), Department of Biomedical and Clinical Sciences, Linköping University, Linkoping, Sweden.
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Zheng K, Zeng Z, Tian Q, Huang J, Zhong Q, Huo X. Epidemiological evidence for the effect of environmental heavy metal exposure on the immune system in children. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 868:161691. [PMID: 36669659 DOI: 10.1016/j.scitotenv.2023.161691] [Citation(s) in RCA: 31] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Revised: 12/28/2022] [Accepted: 01/14/2023] [Indexed: 06/17/2023]
Abstract
Heavy metals exist widely in daily life, and exposure to heavy metals caused by environmental pollution has become a serious public health problem worldwide. Due to children's age-specific behavioral characteristics and imperfect physical function, the adverse health effects of heavy metals on children are much higher than in adults. Studies have found that heavy metal exposure is associated with low immune function in children. Although there are reviews describing the evidence for the adverse effects of heavy metal exposure on the immune system in children, the summary of evidence from epidemiological studies involving the level of immune molecules is not comprehensive. Therefore, this review summarizes the current epidemiological study on the effect of heavy metal exposure on childhood immune function from multiple perspectives, emphasizing its risks to the health of children's immune systems. It focuses on the effects of six heavy metals (lead (Pb), cadmium (Cd), arsenic (As), mercury (Hg), nickel (Ni), and manganese (Mn)) on children's innate immune cells, lymphocytes and their subpopulations, cytokines, total and specific immunoglobulins, and explores the immunotoxicological effects of heavy metals. The review finds that exposure to heavy metals, particularly Pb, Cd, As, and Hg, not only reduced lymphocyte numbers and suppressed adaptive immune responses in children, but also altered the innate immune response to impair the body's ability to fight pathogens. Epidemiological evidence suggests that heavy metal exposure alters cytokine levels and is associated with the development of inflammatory responses in children. Pb, As, and Hg exposure was associated with vaccination failure and decreased antibody titers, and increased risk of immune-related diseases in children by altering specific immunoglobulin levels. Cd, Ni and Mn showed activation effects on the immune response to childhood vaccination. Exposure age, sex, nutritional status, and co-exposure may influence the effects of heavy metals on immune function in children.
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Affiliation(s)
- Keyang Zheng
- Laboratory of Environmental Medicine and Developmental Toxicology, School of Environment, Jinan University, 855 East Xingye Avenue, Guangzhou 511443, Guangdong, China; Department of Public Health and Preventive Medicine, School of Medicine, Jinan University, Guangzhou 510632, Guangdong, China
| | - Zhijun Zeng
- Laboratory of Environmental Medicine and Developmental Toxicology, School of Environment, Jinan University, 855 East Xingye Avenue, Guangzhou 511443, Guangdong, China
| | - Qianwen Tian
- Laboratory of Environmental Medicine and Developmental Toxicology, School of Environment, Jinan University, 855 East Xingye Avenue, Guangzhou 511443, Guangdong, China; Department of Public Health and Preventive Medicine, School of Medicine, Jinan University, Guangzhou 510632, Guangdong, China
| | - Jintao Huang
- Laboratory of Environmental Medicine and Developmental Toxicology, School of Environment, Jinan University, 855 East Xingye Avenue, Guangzhou 511443, Guangdong, China; Department of Public Health and Preventive Medicine, School of Medicine, Jinan University, Guangzhou 510632, Guangdong, China
| | - Qi Zhong
- Laboratory of Environmental Medicine and Developmental Toxicology, School of Environment, Jinan University, 855 East Xingye Avenue, Guangzhou 511443, Guangdong, China; Department of Public Health and Preventive Medicine, School of Medicine, Jinan University, Guangzhou 510632, Guangdong, China
| | - Xia Huo
- Laboratory of Environmental Medicine and Developmental Toxicology, School of Environment, Jinan University, 855 East Xingye Avenue, Guangzhou 511443, Guangdong, China.
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Tian X, Zhang K, Wang N, Cheng B, Xu H, Guang S. Synthesis of a novel triphenylamine-based multifunctional fluorescent probe for continuous recognition application s. NEW J CHEM 2023. [DOI: 10.1039/d2nj05116h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
In this paper, a novel fluorescent probe, TPA-PAT, with continuous recognition based on triphenylamine was designed, synthesized, and characterized by NMR, IR, and fluorescence spectrophotometry techniques.
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Affiliation(s)
- Xiaoyong Tian
- State Key Laboratory for Modification of Chemical Fibers and Polymers Materials & College of Materials Sciences and Engineering, Donghua University, Shanghai, 201620, China
| | - Kezhen Zhang
- State Key Laboratory for Modification of Chemical Fibers and Polymers Materials & College of Materials Sciences and Engineering, Donghua University, Shanghai, 201620, China
| | - Nan Wang
- College of Chemistry, and Chemical Engineering and Biotechnology, Donghua University, Shanghai, 201620, China
| | - Baijie Cheng
- College of Chemistry, and Chemical Engineering and Biotechnology, Donghua University, Shanghai, 201620, China
| | - Hongyao Xu
- State Key Laboratory for Modification of Chemical Fibers and Polymers Materials & College of Materials Sciences and Engineering, Donghua University, Shanghai, 201620, China
| | - Shanyi Guang
- College of Chemistry, and Chemical Engineering and Biotechnology, Donghua University, Shanghai, 201620, China
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Said AI, Staneva D, Angelova S, Grabchev I. Self-Associated 1,8-Naphthalimide as a Selective Fluorescent Chemosensor for Detection of High pH in Aqueous Solutions and Their Hg 2+ Contamination. SENSORS (BASEL, SWITZERLAND) 2022; 23:399. [PMID: 36616999 PMCID: PMC9824833 DOI: 10.3390/s23010399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 12/21/2022] [Accepted: 12/26/2022] [Indexed: 06/17/2023]
Abstract
A novel diamino triazine based 1,8-naphthalimide (NI-DAT) has been designed and synthesized. Its photophysical properties have been investigated in different solvents and its sensory capability evaluated. The fluorescence emission of NI-DAT is significantly impacted by the solvent polarity due to its inherent intramolecular charge transfer character. Moreover, the fluorescence emission quenched at higher pH as a result of photo-induced electron transfer (PET) from triazine moiety to 1,8-naphthalimide after cleaving hydrogen bonds in the self-associated dimers. Furthermore, the new chemosensor exhibited a good selectivity and sensitivity towards Hg2+ among all the used various cations and anions in the aqueous solution of ethanol (5:1, v/v, pH = 7.2, Tampon buffer). NI-DAT emission at 540 nm was quenched remarkably only by Hg2+, even in the presence of other cations or anions as interfering analytes. Job's plot revealed a 2:1 stoichiometric ratio for NI-DAT/Hg2+ complex, respectively.
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Affiliation(s)
- Awad I. Said
- Faculty of Medicine, Sofia University “St. Kliment Ohridski”, 1407 Sofia, Bulgaria
- Department of Chemistry, Faculty of Science, Assiut University, Assiut 71516, Egypt
| | - Desislava Staneva
- Department of Textile, Leather and Fuels, University of Chemical Technology and Metallurgy, 1756 Sofia, Bulgaria
| | - Silvia Angelova
- Institute of Optical Materials and Technologies “Acad. J. Malinowski”, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
| | - Ivo Grabchev
- Faculty of Medicine, Sofia University “St. Kliment Ohridski”, 1407 Sofia, Bulgaria
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Spence T, Zavez A, Allsopp PJ, Conway MC, Yeates AJ, Mulhern MS, van Wijngaarden E, Strain JJ, Myers GJ, Watson GE, Davidson PW, Shamlaye CF, Thurston SW, McSorley EM. Serum cytokines are associated with n-3 polyunsaturated fatty acids and not with methylmercury measured in infant cord blood in the Seychelles child development study. ENVIRONMENTAL RESEARCH 2022; 204:112003. [PMID: 34492279 DOI: 10.1016/j.envres.2021.112003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 08/30/2021] [Accepted: 09/01/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND Maternal fish consumption increases infant methylmercury (MeHg) exposure and polyunsaturated fatty acid (PUFA) concentrations. The n-3 PUFA are regulators of inflammation while MeHg may impact the cord cytokine profile and, subsequently, contribute to immune mediated outcomes. This study aimed to investigate associations between infant MeHg exposure and cord cytokine concentrations while adjusting for cord PUFA. METHODS We studied participants in the Seychelles Child Development Study (SCDS) Nutrition Cohort 2 (NC2), a large birth cohort in a high fish-eating population. Whole blood MeHg, serum PUFA and serum cytokine concentrations (IFN-γ, IL-1β, IL-2, IL-12p70, TNF-α, IL-4, IL-10, IL-13, IL-6 and IL-8) were measured in cord blood collected at delivery (n = 878). Linear regression examined associations between infant MeHg exposure and cord cytokines concentrations, with and without adjustment for cord PUFA. An interaction model examined cord MeHg, cytokines and tertiles of the n-6:n-3 ratio (low/medium/high). RESULTS There was no overall association between cord MeHg (34.08 ± 19.98 μg/L) and cytokine concentrations, with or without adjustment for PUFA. Increased total n-3 PUFA (DHA, EPA and ALA) was significantly associated with lower IL-10 (β = -0.667; p = 0.007) and lower total Th2 (IL-4, IL-10 and IL-13) (β = -0.715; p = 0.036). In the interaction model, MeHg and IL-1β was positive and significantly different from zero in the lowest n-6:n-3 ratio tertile (β = 0.002, p = 0.03). CONCLUSION Methylmercury exposure from fish consumption does not appear to impact markers of inflammation in cord blood. The association of cord n-3 PUFA with lower IL-10 and total Th2 cytokines suggests that they may have a beneficial influence on the regulation of the inflammatory milieu. These findings are important for public health advice and deserve to be investigated in follow up studies.
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Affiliation(s)
- Toni Spence
- Nutrition Innovation Centre for Food and Health, Ulster University, Coleraine, County Londonderry, BT52 1SA, UK.
| | - Alexis Zavez
- School of Medicine and Dentistry, University of Rochester, 601 Elmwood Avenue, Rochester, NY, 14642, USA.
| | - Philip J Allsopp
- Nutrition Innovation Centre for Food and Health, Ulster University, Coleraine, County Londonderry, BT52 1SA, UK
| | - Marie C Conway
- Nutrition Innovation Centre for Food and Health, Ulster University, Coleraine, County Londonderry, BT52 1SA, UK.
| | - Alison J Yeates
- Nutrition Innovation Centre for Food and Health, Ulster University, Coleraine, County Londonderry, BT52 1SA, UK.
| | - Maria S Mulhern
- Nutrition Innovation Centre for Food and Health, Ulster University, Coleraine, County Londonderry, BT52 1SA, UK.
| | - Edwin van Wijngaarden
- School of Medicine and Dentistry, University of Rochester, 601 Elmwood Avenue, Rochester, NY, 14642, USA.
| | - J J Strain
- Nutrition Innovation Centre for Food and Health, Ulster University, Coleraine, County Londonderry, BT52 1SA, UK.
| | - Gary J Myers
- School of Medicine and Dentistry, University of Rochester, 601 Elmwood Avenue, Rochester, NY, 14642, USA.
| | - Gene E Watson
- School of Medicine and Dentistry, University of Rochester, 601 Elmwood Avenue, Rochester, NY, 14642, USA.
| | - Philip W Davidson
- School of Medicine and Dentistry, University of Rochester, 601 Elmwood Avenue, Rochester, NY, 14642, USA.
| | | | - Sally W Thurston
- School of Medicine and Dentistry, University of Rochester, 601 Elmwood Avenue, Rochester, NY, 14642, USA.
| | - Emeir M McSorley
- Nutrition Innovation Centre for Food and Health, Ulster University, Coleraine, County Londonderry, BT52 1SA, UK.
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Chan PHY, Kwok KM, Chan MHM, Li AM, Chan IHS, Fok TF, Lam HS. Prenatal methylmercury exposure is associated with decrease heart rate variability in children. ENVIRONMENTAL RESEARCH 2021; 200:111744. [PMID: 34310966 DOI: 10.1016/j.envres.2021.111744] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2021] [Revised: 07/19/2021] [Accepted: 07/19/2021] [Indexed: 05/10/2023]
Abstract
BACKGROUND Although several epidemiological studies have suggested mercury (Hg) might be associated with cardiotoxicity, the impact of Hg exposure on cardiac autonomic activity and blood pressure in children has not been investigated at Hg exposure levels equivalent to the Environmental Protection Agency (EPA) reference dose. OBJECTIVE To investigate the association between low dose prenatal and recent methylmercury (MeHg) exposures and cardiac autonomic function and blood pressure with adjustment for factors such as fish consumption among children from a high fish consumption coastal city. METHODS Children aged 7-8 years were recruited from the birth cohort of our previous study. Heart rate variability (HRV), resting heart rate (RHR) and blood pressure were measured as surrogate markers of cardiac autonomic function. Cord blood and current whole blood Hg concentration were used as biomarkers of prenatal and recent MeHg exposure, respectively. Recent fish consumption information was estimated with a food frequency questionnaire. RESULTS Among 604 children, median cord blood and whole blood Hg concentrations were 45.9 nmol/L (IQR: 32.8-65.03 nmol/L) and 13.57 nmol/L (IQR: 9.29-19.72 nmol/L), respectively. Our results demonstrated that prenatal MeHg exposure was associated with decreased HRV (i.e. low CVRR, SDRR, and RMSSD), reflecting reduced parasympathetic activity (i.e. low CCVHF and HF), and a sympathovagal balance shift toward sympathetic predominance (i.e. high %LF and LF/HF ratio). Adjustment of recent fish consumption further increased the significance and magnitude of the adverse associations of MeHg. CONCLUSION The results of this study suggest that prenatal MeHg exposure is associated with decreased parasympathetic modulation of cardiac autonomic function in children.
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Affiliation(s)
- Peggy Hiu Ying Chan
- Department of Paediatrics, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong; Brain and Mind Institute, The Chinese University of Hong Kong, Hong Kong
| | - Ka Ming Kwok
- Department of Paediatrics, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong
| | - Michael Ho Ming Chan
- Department of Chemical Pathology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong
| | - Albert Martin Li
- Department of Paediatrics, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong
| | - Iris Hiu Shuen Chan
- Department of Chemical Pathology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong
| | - Tai Fai Fok
- Department of Paediatrics, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong
| | - Hugh Simon Lam
- Department of Paediatrics, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong.
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Chronological Trends and Mercury Bioaccumulation in an Aquatic Semiarid Ecosystem under a Global Climate Change Scenario in the Northeastern Coast of Brazil. Animals (Basel) 2021; 11:ani11082402. [PMID: 34438859 PMCID: PMC8388643 DOI: 10.3390/ani11082402] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 08/03/2021] [Accepted: 08/09/2021] [Indexed: 11/17/2022] Open
Abstract
Simple Summary Managing aquatic systems is becoming increasingly complex due to human impacts, multiple and competing water needs and climate variability. Considering the Hg concentration present in the top layers of sediment (~20 cm around 30 to 40 years) with the outer layers in the tree cores tree rings cores and in the sediment’s cores from Pacoti estuary and the Ceará estuary, overall data indicate an increase in mercury in recent years. A positive and significant correlation (p < 0.05) was revealed between Hg trends in sediments and Hg trends in annular tree rings. This shared Hg pattern reflects local environmental conditions. The results of this work reinforce the indicators previously described in the semiarid NE region of Brazil, showing that global climate change and some anthropogenic factors are key drivers to Hg exposure and biomagnification for wildlife and humans. Possible climate-induced shifts in these aquatic systems highlight the need for accurate and regionally specific metrics of change in the past in response to climate and for improved understanding of response to climate factors. These processes are inducing a greater mobilization of bioavailable Hg, which could allow an acceleration of the biogeochemical transformation of Hg. Abstract Due to global warming, in the northeastern semiarid coastal regions of Brazil, regional and global drivers are responsible for decreasing continental runoff and increasing estuarine water residence time, which promotes a greater mobilization of bioavailable mercury (Hg) and allows increasing fluxes and/or bioavailability of this toxic trace element and an acceleration of biogeochemical transformation of Hg. In this work, an application of dendrochemistry analysis (annular tree rings analysis) was developed for the reconstruction of the historical pattern of mercury contamination in a contaminated area, quantifying chronological Hg contamination trends in a tropical semiarid ecosystem (Ceará River Estuary, northeastern coast of Brazil) through registration of mercury concentration on growth rings in specimens of Rhizophora mangle L. and using the assessment in sediments as a support for the comparison of profiles of contamination. The comparison with sediments from the same place lends credibility to this type of analysis, as well as the relationship to the historical profile of contamination in the region, when compared with local data about industries and ecological situation of sampling sites. In order to evaluate the consequences of the described increase in Hg bioavailability and bioaccumulation in aquatic biota, and to assess the biological significance of Hg concentrations in sediments to fish and wildlife, muscle and liver from a bioindicator fish species, S. testudineus, were also analyzed. The results of this work reinforce the indicators previously described in the semiarid NE region of Brazil, which showed that global climate change and some anthropogenic factors are key drivers of Hg exposure and biomagnification for wildlife and humans. Considering the Hg concentration present in the top layers of sediment (~20 cm around 15 to 20 years) with the outer layers in the tree ring cores and in the sediment’s cores from Pacoti estuary and the Ceará estuary, overall the data indicate an increase in mercury in recent years in the Hg surface sediments, especially associated with the fine sediment fraction, mainly due to the increased capacity of small particles to adsorb Hg. There was revealed a positive and significant correlation (p < 0.05) between Hg trends in sediments and Hg trends in annular tree rings. This shared Hg pattern reflects local environmental conditions. The Hg concentration values in S. testudineus from both study areas are not restrictive to human consumption, being below the legislated European limit for Hg in foodstuffs. The results from S. testudineus muscles analysis suggest a significant and linear increase in Hg burden with increasing fish length, indicating that the specimens are accumulating Hg as they grow. The results from both rivers show an increase in BSAF with fish growth. The [Hg] liver/[Hg] muscles ratio >1, which indicates that the S. testudineus from both study areas are experiencing an increase in Hg bioavailability. Possible climate-induced shifts in these aquatic systems processes are inducing a greater mobilization of bioavailable Hg, which could allow an acceleration of the biogeochemical transformation of Hg.
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Kennedy SN, Keogh M, Levin M, Castellini JM, Lian M, Fadely BS, Rea LD, O'Hara TM. Regional variations and relationships among cytokine profiles, white blood cell counts, and blood mercury concentrations in Steller sea lion (Eumetopias jubatus) pups. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 775:144894. [PMID: 33631572 DOI: 10.1016/j.scitotenv.2020.144894] [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: 11/16/2020] [Revised: 12/23/2020] [Accepted: 12/27/2020] [Indexed: 06/12/2023]
Abstract
The Steller sea lion (SSL) population west of 144°W longitude experienced a significant population decline. While there appears to be a stable or increasing population trend in rookeries in the Gulf of Alaska (GOA) and Southeast Alaska (SEA), some rookeries within the Aleutian Islands (AI) have failed to recover. Previous studies found regional differences in whole blood total mercury concentrations ([THg]) showing more than 20% of AI pups had [THg] above critical thresholds for increased risk of immunological effects and other adverse outcomes. Measurements of immune cell-signaling proteins can be used to evaluate the immune status of marine mammals in relation to [THg]. We compared serum cytokine and chemokine concentrations in pups among regions (AI, eastern GOA, SEA), and examined associations among cytokines, chemokines, white blood cell (WBC) counts, and [THg]. Considering liver is an important target organ for mercury and immune protein synthesis we additionally examined the relationship of [THg] with liver-related enzymes serum aspartate (AST) and alanine aminotransferase (ALT). We observed regional differences in cytokine and chemokine measurements and immune protein associations. There was a positive association between total WBC counts and [THg] in AI pups, whereas a negative association between lymphocytes and [THg] in SEA pups. These findings may indicate regional variation in proliferation and differentiation of hematopoietic cells, differences in immune system development, and/or a difference in antigenic stimuli. No associations between [THg] and cytokines, chemokines, AST or ALT were found. Observed regional differences in cytokine and chemokine milieu during gestational and early development in SSL pups could lead to an imbalance in cell differentiation that could impact immunological resiliency in juvenile and adult life stages. We report concentration ranges of a suite of cytokines and chemokines which may prove to be a useful metric for ecotoxicology and risk assessment studies in SSLs and other wildlife.
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Affiliation(s)
- Stephanie N Kennedy
- Department of Chemistry and Biochemistry, University of Alaska Fairbanks, Fairbanks, AK, USA; Harvard Medical School and Division of Gastroenterology, Boston Children's Hospital, Boston, MA, USA.
| | - Mandy Keogh
- Alaska Department of Fish and Game, Division of Wildlife Conservation, Juneau, AK, USA.
| | - Milton Levin
- Department of Veterinary Medicine, University of Connecticut, Storrs, CT, USA.
| | - J Margaret Castellini
- Department of Veterinary Medicine, University of Alaska Fairbanks, Fairbanks, AK, USA.
| | - Marianne Lian
- Department of Chemistry and Biochemistry, University of Alaska Fairbanks, Fairbanks, AK, USA; Department of Veterinary Medicine, University of Alaska Fairbanks, Fairbanks, AK, USA.
| | - Brian S Fadely
- Marine Mammal Laboratory, Alaska Fisheries Science Center, National Marine Fisheries Service, NOAA, Seattle, WA, USA.
| | - Lorrie D Rea
- Institute of Northern Engineering, University of Alaska Fairbanks, Fairbanks, AK, USA.
| | - Todd M O'Hara
- Department of Veterinary Medicine, University of Alaska Fairbanks, Fairbanks, AK, USA; Veterinary Integrative Biosciences, College of Veterinary Medicine & Biomedical Sciences, Texas A&M University, College Station, TX, USA.
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Wang M, Xia W, Zeng Q, Zhang W, Qian X, Bao S, Zhou A, Li Y, Xu S. Associations between prenatal and postnatal lead exposure and preschool children humoral and cellular immune responses. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 207:111536. [PMID: 33254398 DOI: 10.1016/j.ecoenv.2020.111536] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 10/15/2020] [Accepted: 10/18/2020] [Indexed: 06/12/2023]
Abstract
Studies have shown that lead exposure affected the immune function, but few studies have examined the relationships between in utero lead exposure, a sensitive period that is important for immune development, and later immune responses. To investigate the effects of prenatal and childhood lead exposure on the preschool-aged children's immune responses, a prospective birth cohort study was established in Wuhan, China, in which lead concentrations were analyzed in maternal urine during the third trimester and in plasma samples from children aged about 3 years. We assessed immune responses by measuring immune cytokines in the children's plasma (n = 326) and peripheral blood T lymphocyte subsets (n = 394) at 3 years of age. Each unit increase in maternal urinary lead concentration (μg/g creatinine) was associated with reduced IL-10 (β = -5.93%, 95%CI: -11.82%, -0.03%) and reduced IL-4 levels (β = -5.62%, 95%CI: -10.44%, -0.80%). Lead in children's plasma (μg/L) was associated with significant increase in TNF-α (β = 10.78%, 95%CI: 3.97%, 17.59%). No statistically significant relationship of childhood lead exposure with T lymphocyte subsets was observed. The study suggested prenatal and childhood lead exposure was associated with changes in preschool children's plasma cytokine levels.
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Affiliation(s)
- Meng Wang
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Wei Xia
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China.
| | - Qiang Zeng
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Wenxin Zhang
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Xi Qian
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Shuangshuang Bao
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Aifen Zhou
- Wuhan Medical and Healthcare Center for Women and Children, Wuhan, Hubei, PR China
| | - Yuanyuan Li
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
| | - Shunqing Xu
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, PR China
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12
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Tian M, Wang C, Ma Q, Bai Y, Sun J, Ding C. A Highly Selective Fluorescent Probe for Hg 2+ Based on a 1,8-Naphthalimide Derivative. ACS OMEGA 2020; 5:18176-18184. [PMID: 32743192 PMCID: PMC7391857 DOI: 10.1021/acsomega.0c01790] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2020] [Accepted: 06/29/2020] [Indexed: 05/31/2023]
Abstract
Hg2+ has a significant hazardous impact on the environment and ecosystem. There is a great demand for new methods with high selectivity and sensitivity to determine mercury in life systems and environments. In this paper, a novel turn-on Hg2+ fluorescent probe has been reported with a naphthalimide group. The Hg2+ fluorescent probe was designed by the inspiration of the well-known specific Hg2+-triggered thioacetal deprotection reaction. A 1,2-dithioalkyl group was chosen as the specific recognition site of Hg2+. The probe showed weak fluorescence without Hg2+, and the color of the solution was light yellow. In the presence of Hg2+, the probe reacted specifically with the mercury ion to produce an aldehyde and emitted strong fluorescence, and the color of the solution also turned light green, thus realizing the monitoring of the mercury ion. The Hg2+ fluorescent probe showed outstanding sensitivity and selectivity toward Hg2+. Furthermore, the Hg2+ fluorescent probe could work in a wide pH range. The linear relationship between the fluorescence intensity at 510 nm and the concentration of Hg2+ was obtained in a range of Hg2+ concentration from 2.5 × 10-7 to 1.0 × 10-5 M. The detection limit was found to be 4.0 × 10-8 M for Hg2+. Furthermore, with little cell toxicity, the probe was successfully applied to the confocal image of Hg2+ in PC-12 cells.
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Affiliation(s)
- Meiju Tian
- School
of Pharmacy, Henan University of Traditional
Chinese Medicine, Zhengzhou 450046, PR China
| | - Chunyan Wang
- School
of Pharmacy, Henan University of Traditional
Chinese Medicine, Zhengzhou 450046, PR China
| | - Qiujuan Ma
- School
of Pharmacy, Henan University of Traditional
Chinese Medicine, Zhengzhou 450046, PR China
- Zhengzhou
Key Laboratory of Chinese Medicine Quality Control and Evaluation, Zhengzhou 450046, PR China
| | - Yu Bai
- School
of Pharmacy, Henan University of Traditional
Chinese Medicine, Zhengzhou 450046, PR China
| | - Jingguo Sun
- School
of Pharmacy, Henan University of Traditional
Chinese Medicine, Zhengzhou 450046, PR China
| | - Chunfeng Ding
- Henan
Key Laboratory of Laser and Optoelectric Information Technology, School
of Information Engineering, Zhengzhou University, Zhengzhou 450001, PR China
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13
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Merlo E, Schereider IRG, Simões MR, Vassallo DV, Graceli JB. Mercury leads to features of polycystic ovary syndrome in rats. Toxicol Lett 2019; 312:45-54. [PMID: 31071422 DOI: 10.1016/j.toxlet.2019.05.006] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 04/11/2019] [Accepted: 05/05/2019] [Indexed: 01/28/2023]
Abstract
Mercury (Hg) is a heavy metal and Hg exposure is associated with various neural, immune, and cardiovascular abnormalities. However, few studies have evaluated Hg's toxicologic effect on reproductive and metabolic functions. In this study, we assessed whether Hg exposure results in reproductive and metabolic abnormalities. Hg was administered to adult female Wistar rats, mimicking the Hg levels found in exposed human blood, and their reproductive and metabolic function was assessed. Rats exposed to Hg displayed abnormal estrous cyclicity and ovarian follicular development, with a reduction in ovarian antral follicles and an increase in atretic and cystic ovarian follicles. Uterine atrophy with the presence of inflammatory cells was observed in Hg-exposed rats. The presence of abnormal ovarian fat accumulation, as well as increased ovarian lipid drops accumulation, was observed in Hg-exposed rats. Ovarian oxidative stress was also present in the Hg-exposed rats. High fasting glucose levels, glucose, and insulin intolerance were observed in Hg-exposed rats. Thus, these data suggest that Hg exposure led to abnormal reproductive and metabolic features similar to those found in the polycystic ovary syndrome (PCOS) rat models.
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Affiliation(s)
- Eduardo Merlo
- Dept of Morphology, Federal University of Espírito Santo, Brazil
| | | | - Maylla R Simões
- Dept of Physiology, Federal University of Espírito Santo, Brazil
| | | | - Jones B Graceli
- Dept of Morphology, Federal University of Espírito Santo, Brazil.
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14
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Algarve TD, Assmann CE, Cadoná FC, Machado AK, Manica-Cattani MF, Sato-Miyata Y, Asano T, Duarte MMMF, Ribeiro EE, Aigaki T, da Cruz IBM. Guarana improves behavior and inflammatory alterations triggered by methylmercury exposure: an in vivo fruit fly and in vitro neural cells study. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:15069-15083. [PMID: 30915696 DOI: 10.1007/s11356-019-04881-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Accepted: 03/15/2019] [Indexed: 06/09/2023]
Abstract
Methylmercury (MeHg) is a well-known environmental pollutant associated with neurological and developmental deficits in animals and humans. However, epidemiological data showed that people living in the Amazon region although exposed to MeHg do not present these effects probably due to the protective effect of certain foods. We hypothesized here if guarana, a highly caffeinated fruit and consumed on a daily basis by Amazon people, could have some protective effect against MeHg toxicity using two complementary approaches. To assess locomotor impairment and sleep disruption, we used fruit fly (Drosophila melanogaster) model, and to evaluate neuroinflammation, we used human SH-SY5Y neural cells by measuring inflammatory cytokines levels. Results showed that guarana had a protective effect on the locomotor activity of male fruit flies reducing the excessive sleepiness caused by MeHg and increasing daily activity. Also, guarana increased the viability of flies and attenuated neural cells mortality. In addition, guarana reduced all pro-inflammatory cytokines levels increased by MeHg, along with caspase-1, caspase -3, caspase-8, and 8-dOHG levels, whereas increased the anti-inflammatory (IL-10) cytokine levels, which was decreased by MeHg. Our study provides new insights on the protective effects of guarana on the viability, locomotor activity, sleep, and activity patterns in vivo and the in vitro neuronal anti-inflammatory effect against MeHg toxicity.
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Affiliation(s)
- Thaís Doeler Algarve
- Tokyo Metropolitan University, Hachioji, Tokyo, Japan
- Graduate Program in Toxicological Biochemistry, Federal University of Santa Maria, 1000 Roraima Av., Building 19, Room 3101, Santa Maria, RS, 97105900, Brazil
| | - Charles Elias Assmann
- Graduate Program in Toxicological Biochemistry, Federal University of Santa Maria, 1000 Roraima Av., Building 19, Room 3101, Santa Maria, RS, 97105900, Brazil
| | - Francine Carla Cadoná
- Graduate Program in Biosciences and Health, University of the West of Santa Catarina, Joaçaba, Brazil
| | | | | | | | - Tsunaki Asano
- Tokyo Metropolitan University, Hachioji, Tokyo, Japan
| | | | | | | | - Ivana Beatrice Mânica da Cruz
- Graduate Program in Toxicological Biochemistry, Federal University of Santa Maria, 1000 Roraima Av., Building 19, Room 3101, Santa Maria, RS, 97105900, Brazil.
- Graduate Program in Pharmacology, Federal University of Santa Maria, Santa Maria, Brazil.
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15
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Bahta M, Ahmed N. A novel 1,8-naphthalimide as highly selective naked-eye and ratiometric fluorescent sensor for detection of Hg2+ ions. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.01.009] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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16
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Eagles-Smith CA, Silbergeld EK, Basu N, Bustamante P, Diaz-Barriga F, Hopkins WA, Kidd KA, Nyland JF. Modulators of mercury risk to wildlife and humans in the context of rapid global change. AMBIO 2018; 47:170-197. [PMID: 29388128 PMCID: PMC5794686 DOI: 10.1007/s13280-017-1011-x] [Citation(s) in RCA: 193] [Impact Index Per Article: 32.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Environmental mercury (Hg) contamination is an urgent global health threat. The complexity of Hg in the environment can hinder accurate determination of ecological and human health risks, particularly within the context of the rapid global changes that are altering many ecological processes, socioeconomic patterns, and other factors like infectious disease incidence, which can affect Hg exposures and health outcomes. However, the success of global Hg-reduction efforts depends on accurate assessments of their effectiveness in reducing health risks. In this paper, we examine the role that key extrinsic and intrinsic drivers play on several aspects of Hg risk to humans and organisms in the environment. We do so within three key domains of ecological and human health risk. First, we examine how extrinsic global change drivers influence pathways of Hg bioaccumulation and biomagnification through food webs. Next, we describe how extrinsic socioeconomic drivers at a global scale, and intrinsic individual-level drivers, influence human Hg exposure. Finally, we address how the adverse health effects of Hg in humans and wildlife are modulated by a range of extrinsic and intrinsic drivers within the context of rapid global change. Incorporating components of these three domains into research and monitoring will facilitate a more holistic understanding of how ecological and societal drivers interact to influence Hg health risks.
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Affiliation(s)
| | - Ellen K. Silbergeld
- Johns Hopkin Bloomberg School of Public Health, 615 N. Wolfe Street, E6644, Baltimore, MD 21205 USA
| | - Niladri Basu
- McGill University, 204-CINE Building, Montreal, QC H9X 3V9 Canada
| | - Paco Bustamante
- University of La Rochelle, laboratory of Littoral Environment and Societies, Littoral Environnement et Sociétés (LIENSs), LIENSs UMR 7266 CNRS-Université de La Rochelle, 2 rue Olympe de Gouges, 17000 La Rochelle, France
| | - Fernando Diaz-Barriga
- Center for Applied Research in Environment and Health at, Universidad Autonoma de San Luis Potosi, Avenida Venustiano Carranza No. 2405, Col Lomas los Filtros Código Postal, 78214 San Luis Potosí, SLP Mexico
| | - William A. Hopkins
- Department of Fish and Wildlife Conservation, 310 West Campus Drive Virginia Tech, Cheatham Hall, Room 106 (MC 0321), Blacksburg, VA 24061 USA
| | - Karen A. Kidd
- Department of Biology & School of Geography and Earth Sciences, McMaster University, 1280 Main Street W., Hamilton, ON L8S 4K1 Canada
| | - Jennifer F. Nyland
- Department of Biological Sciences, 1101 Camden Ave, Salisbury, MD 21801 USA
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17
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Minatoya M, Araki A, Miyashita C, Ait Bamai Y, Itoh S, Yamamoto J, Onoda Y, Ogasawara K, Matsumura T, Kishi R. Association between prenatal bisphenol A and phthalate exposures and fetal metabolic related biomarkers: The Hokkaido study on Environment and Children's Health. ENVIRONMENTAL RESEARCH 2018; 161:505-511. [PMID: 29223775 DOI: 10.1016/j.envres.2017.11.052] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Revised: 11/16/2017] [Accepted: 11/29/2017] [Indexed: 06/07/2023]
Abstract
Bisphenol A and phthalates are widely detected in human urine, blood, breast milk, and amniotic fluid. Both bisphenol A and phthalates have been suggested as playing a role in obesity epidemics. Exposure to these chemicals during fetal development, and its consequences should be concerning because they can cross the placenta. Thus, this study aimed to assess the association between prenatal exposure to bisphenol A and phthalates, and cord blood metabolic-related biomarkers. Maternal serum was used during the first trimester, to determine prenatal exposure to bisphenol A and phthalates. Levels of metabolic-related biomarkers in the cord blood were also determined. Linear regression models were applied to the 365 participants with both, exposure and biomarker assessments, adjusted for maternal age, pre-pregnancy body mass index, parity, education, and sex of the child. The level of bisphenol A was negatively associated with the leptin level (β = -0.06, 95% confidence interval [CI]: -0.11, -0.01), but was positively associated with the high-molecular-weight adiponectin level, with marginal significance (β = 0.03, 95%CI: 0.00, 0.06). The mono-isobutyl phthalate (MiBP), mono-n-butyl phthalate (MnBP), mono-(2-ethylhexyl) phthalate (MEHP), and summation of MEHP and MECPP to represent DEHP exposure (∑DEHPm) levels were inversely associated with the leptin levels (β=-0.14, 95%CI: -0.27, -0.01; β = -0.12, 95%CI: -0.24, 0.00 with marginal significance; β=0.08, 95%CI: -0.14, -0.03; and β = -0.09, 95%CI: -0.16, -0.03, respectively). The present study provided some evidence that prenatal exposure to bisphenol A and certain phthalates may modify fetal adiponectin and leptin levels.
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Affiliation(s)
- Machiko Minatoya
- Center for Environmental and Health Sciences, Hokkaido University, Kita 12, Nishi 7, Kita-ku, Sapporo 060-0812, Japan
| | - Atsuko Araki
- Center for Environmental and Health Sciences, Hokkaido University, Kita 12, Nishi 7, Kita-ku, Sapporo 060-0812, Japan
| | - Chihiro Miyashita
- Center for Environmental and Health Sciences, Hokkaido University, Kita 12, Nishi 7, Kita-ku, Sapporo 060-0812, Japan
| | - Yu Ait Bamai
- Center for Environmental and Health Sciences, Hokkaido University, Kita 12, Nishi 7, Kita-ku, Sapporo 060-0812, Japan
| | - Sachiko Itoh
- Center for Environmental and Health Sciences, Hokkaido University, Kita 12, Nishi 7, Kita-ku, Sapporo 060-0812, Japan
| | - Jun Yamamoto
- Institute of Environmental Ecology, Idea Consultants, Inc., 1334-5 Riemon, Yaizu, Shizuoka 421-0212, Japan
| | - Yu Onoda
- Institute of Environmental Ecology, Idea Consultants, Inc., 1334-5 Riemon, Yaizu, Shizuoka 421-0212, Japan
| | - Kazuki Ogasawara
- Institute of Environmental Ecology, Idea Consultants, Inc., 1334-5 Riemon, Yaizu, Shizuoka 421-0212, Japan
| | - Toru Matsumura
- Institute of Environmental Ecology, Idea Consultants, Inc., 1334-5 Riemon, Yaizu, Shizuoka 421-0212, Japan
| | - Reiko Kishi
- Center for Environmental and Health Sciences, Hokkaido University, Kita 12, Nishi 7, Kita-ku, Sapporo 060-0812, Japan.
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18
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Minatoya M, Itoh S, Araki A, Tamura N, Yamazaki K, Miyashita C, Kishi R. Association between Fetal Adipokines and Child Behavioral Problems at Preschool Age: The Hokkaido Study on Environment and Children's Health. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2018; 15:ijerph15010120. [PMID: 29324697 PMCID: PMC5800219 DOI: 10.3390/ijerph15010120] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/12/2017] [Revised: 12/20/2017] [Accepted: 01/09/2018] [Indexed: 12/21/2022]
Abstract
Studies have suggested associations between maternal obesity and mental health problems of their children. However, the underlying mechanism is largely unknown. A possible mechanism can be via inflammatory states and the other possible mechanism is metabolic hormone-induced programming. Cross-talk between adipokines, including inflammatory cytokines and metabolic hormones secreted from adipose tissue and the central nervous system needs to be further investigated to elucidate the mechanism. Thus, the aim of this study was to investigate the association between fetal adipokine levels and child behavioral problems at preschool age. Cord blood adiponectin, leptin, tumor necrosis factor-α (TNF-α) and interleukin 6 (IL-6) levels were measured and child behavioral problems were assessed using the Strengths and Difficulties Questionnaire at preschool age. Logistic regression models adjusted by related maternal factors were performed to examine the association between cord blood adipokines and child behavioral problems. Three hundred and sixty-one children were included in the final analysis. A significant association between decreased hyperactivity/inattention and increased leptin was found (OR = 0.22, 95% CI: 0.06–0.89). Cord blood adiponectin, TNF-α and IL-6 levels were not associated with child behavioral problems. Our findings suggested that cord blood adipokines, particularly, leptin level, may be a predictor of hyperactivity/inattention problems at preschool age.
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Affiliation(s)
- Machiko Minatoya
- Hokkaido University Center for Environmental and Health Sciences, Kita 12, Nishi 7, Kita-ku, Sapporo 060-0812, Japan.
| | - Sachiko Itoh
- Hokkaido University Center for Environmental and Health Sciences, Kita 12, Nishi 7, Kita-ku, Sapporo 060-0812, Japan.
| | - Atsuko Araki
- Hokkaido University Center for Environmental and Health Sciences, Kita 12, Nishi 7, Kita-ku, Sapporo 060-0812, Japan.
| | - Naomi Tamura
- Hokkaido University Center for Environmental and Health Sciences, Kita 12, Nishi 7, Kita-ku, Sapporo 060-0812, Japan.
| | - Keiko Yamazaki
- Hokkaido University Center for Environmental and Health Sciences, Kita 12, Nishi 7, Kita-ku, Sapporo 060-0812, Japan.
| | - Chihiro Miyashita
- Hokkaido University Center for Environmental and Health Sciences, Kita 12, Nishi 7, Kita-ku, Sapporo 060-0812, Japan.
| | - Reiko Kishi
- Hokkaido University Center for Environmental and Health Sciences, Kita 12, Nishi 7, Kita-ku, Sapporo 060-0812, Japan.
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19
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Ryu J, Ha EH, Kim BN, Ha M, Kim Y, Park H, Hong YC, Kim KN. Associations of prenatal and early childhood mercury exposure with autistic behaviors at 5years of age: The Mothers and Children's Environmental Health (MOCEH) study. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 605-606:251-257. [PMID: 28667852 DOI: 10.1016/j.scitotenv.2017.06.227] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Revised: 06/24/2017] [Accepted: 06/26/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND Although mercury is an established neurotoxin, only few longitudinal studies have investigated the association between prenatal and early childhood mercury exposure and autistic behaviors. METHODS We conducted a longitudinal cohort study using an ongoing prospective birth cohort initiated in 2006, wherein blood mercury levels were measured at early and late pregnancy; in cord blood; and at 2 and 3years of age. We analyzed 458 mother-child pairs. Autistic behaviors were assessed using the Social Responsiveness Scale (SRS) at 5years of age. Both continuous SRS T-scores and T-scores dichotomized by a score of ≥60 or <60 were used as outcomes. RESULTS The geometric mean of mercury concentrations in cord blood was 5.52μg/L. In adjusted models, a doubling of blood mercury levels at late pregnancy (β=1.84, 95% confidence interval [CI]: 0.39, 3.29), in cord blood (β=2.24, 95% CI: 0.22, 4.27), and at 2years (β=2.12, 95% CI: 0.54, 3.70) and 3years (β=2.80, 95% CI: 0.89, 4.72) of age was positively associated with the SRS T-scores. When the SRS T-scores were dichotomized, we observed positive associations with mercury levels at late pregnancy (relative risk [RR]=1.31, 95% CI: 1.08, 1.60) and in cord blood (RR=1.28, 95% CI: 1.01, 1.63). CONCLUSION We found that blood mercury levels at late pregnancy and early childhood were associated with more autistic behaviors in children at 5years of age. Further study on the long-term effects of mercury exposure is recommended.
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Affiliation(s)
- Jia Ryu
- Department of Occupational and Environmental Medicine, School of Medicine, Ewha Womans University, Seoul, Republic of Korea
| | - Eun-Hee Ha
- Department of Occupational and Environmental Medicine, School of Medicine, Ewha Womans University, Seoul, Republic of Korea
| | - Boong-Nyun Kim
- Division of Child & Adolescent Psychiatry, Department of Psychiatry and Institute of Human Behavioral Medicine, College of Medicine, Seoul National University, Seoul, Republic of Korea
| | - Mina Ha
- Department of Preventive Medicine, College of Medicine, Dankook University, Cheonan, Republic of Korea
| | - Yangho Kim
- Department of Occupational and Environmental Medicine, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Republic of Korea
| | - Hyesook Park
- Department of Preventive Medicine, School of Medicine, Ewha Womans University, Seoul, Republic of Korea
| | - Yun-Chul Hong
- Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Kyoung-Nam Kim
- Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea; Institute of Public Health and Medical Service, Seoul National University Hospital, Seoul, Republic of Korea.
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20
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Rocha AV, Rita Cardoso B, Zavarize B, Almondes K, Bordon I, Hare DJ, Teixeira Favaro DI, Franciscato Cozzolino SM. GPX1 Pro198Leu polymorphism and GSTM1 deletion do not affect selenium and mercury status in mildly exposed Amazonian women in an urban population. THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 571:801-808. [PMID: 27450956 DOI: 10.1016/j.scitotenv.2016.07.054] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Revised: 07/08/2016] [Accepted: 07/08/2016] [Indexed: 06/06/2023]
Abstract
Mercury is potent toxicant element, but its toxicity can be reduced by forming a complex with selenium for safe excretion. Considering the impact of mercury exposure in the Amazon region and the possible interaction between these two elements, we aimed to assess the effects of Pro198Leu polymorphism to GPX1 and GSTM1 deletion, on mercury levels in a population from Porto Velho, an urban locality in the Brazilian Amazon region. Two hundred women from the capital city of Rondônia state were recruited for this study with 149 deemed suitable to participate. We assessed dietary intake using 24-hour recall. Selenium levels in plasma and erythrocytes were measured using hydride generation quartz tube atomic absorption spectroscopy and total hair mercury using cold vapor atomic absorption spectrometry. Oxidative stress parameters (GPx activity, oxygen radical absorbency capacity [ORAC] and malondialdehyde [MDA]) were also analyzed. All participants were genotyped for Pro198Leu polymorphism and GSTM1 deletion. We observed that this population presented high prevalence of selenium deficiency, and also low levels of mercury, likely due to food habits that did not include selenium-rich food sources or significant consumption of fish (mercury biomagnifiers) regularly. Univariate statistical analysis showed that Pro198Leu and GSTM1 genotypes did not affect selenium and mercury levels in this population. Pro198Leu polymorphism and GSTM1 deletion had no effect on mercury levels in mildly exposed people, suggesting these genetic variants impact mercury levels only in highly exposed populations.
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Affiliation(s)
- Ariana V Rocha
- Faculty of Pharmaceutical Sciences, Department of Food and Experimental Nutrition, University of São Paulo, São Paulo, Brazil
| | - Bárbara Rita Cardoso
- Faculty of Pharmaceutical Sciences, Department of Food and Experimental Nutrition, University of São Paulo, São Paulo, Brazil; The Florey Institute of Neuroscience and Mental Health, The University of Melbourne, 30 Royal Parade, Parkville, Victoria 3052, Australia.
| | - Bruna Zavarize
- Faculty of Pharmaceutical Sciences, Department of Food and Experimental Nutrition, University of São Paulo, São Paulo, Brazil
| | - Kaluce Almondes
- Faculty of Pharmaceutical Sciences, Department of Food and Experimental Nutrition, University of São Paulo, São Paulo, Brazil
| | - Isabella Bordon
- Laboratory of Instrumental Neutron Activation Analysis (INAA), Research Reactor Centre, IPEN - Nuclear and Energy Research Institute, São Paulo, Brazil
| | - Dominic J Hare
- The Florey Institute of Neuroscience and Mental Health, The University of Melbourne, 30 Royal Parade, Parkville, Victoria 3052, Australia; Elemental Bio-Imaging Facility, University of Technology Sydney, Broadway, New South Wales, Australia
| | - Déborah Inês Teixeira Favaro
- Laboratory of Instrumental Neutron Activation Analysis (INAA), Research Reactor Centre, IPEN - Nuclear and Energy Research Institute, São Paulo, Brazil
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21
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Oulhote Y, Shamim Z, Kielsen K, Weihe P, Grandjean P, Ryder LP, Heilmann C. Children's white blood cell counts in relation to developmental exposures to methylmercury and persistent organic pollutants. Reprod Toxicol 2016; 68:207-214. [PMID: 27497749 DOI: 10.1016/j.reprotox.2016.08.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2016] [Revised: 07/28/2016] [Accepted: 08/02/2016] [Indexed: 12/20/2022]
Abstract
BACKGROUND To explore possible markers of developmental immunotoxicity, we prospectively examined 56 children to determine associations between exposures to methylmercury and persistent organic pollutants since birth and the comprehensive differential counts of white blood cells (WBC) at age 5 years. MATERIALS AND METHODS Extended differential count included: neutrophils, eosinophils, basophils, lymphocytes (includingT cells, NK cells, and B cells), and monocytes. Organochlorine compounds (OCs) including polychlorinated biphenyls (PCBs) and pesticides, five perfluoroalkyl substances (PFASs), and total mercury (Hg) were measured in maternal (n=56) and children's blood at 18 months (n=42) and 5 years (n=54). We constructed latent functions for exposures at three different ages using factor analyses and applied structural equation models adjusted for covariates. RESULTS Prenatal mercury exposure was associated with depleted total WBC, especially for lymphocytes, where a one standard deviation (SD) increase in the exposure was associated with a decrease by 23% SD (95% CI: -43, -4) in the cell count. Prenatal exposure to OCs was marginally associated with decreases in neutrophil counts. In contrast, the 5-year PFASs concentrations were associated with higher basophil counts (B=46% SD, 95% CI: 13, 79). Significantly reduced subpopulations of lymphocytes such as B cells, CD4-positive T helper cells and CD4 positive recent thymic emigrants may suggest cellular immunity effects and dysregulation of T-cell mediated immunity. CONCLUSION Developmental exposure to environmental immunotoxicants appears to have different impacts on WBC counts in childhood.
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Affiliation(s)
- Y Oulhote
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Z Shamim
- Institute for Inflammation Research, Department of Rheumatology, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark; Department of Pediatrics and Adolescent Medicine, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
| | - K Kielsen
- Institute for Inflammation Research, Department of Rheumatology, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark; Department of Pediatrics and Adolescent Medicine, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
| | - P Weihe
- Department of Occupational Medicine and Public Health, Faroese Hospital System, Tórshavn, Faroe Islands
| | - P Grandjean
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA; Department of Environmental Medicine, University of Southern Denmark, Odense, Denmark.
| | - L P Ryder
- Department of Clinical Immunology, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
| | - C Heilmann
- Department of Pediatrics and Adolescent Medicine, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
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