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Stingone JA, Sedlar S, Lim S, McVeigh KH. Receipt of Early Intervention Services Before Age 3 Years and Performance on Third-Grade Standardized Tests Among Children Exposed to Lead. JAMA Pediatr 2022; 176:478-485. [PMID: 35254399 PMCID: PMC8902692 DOI: 10.1001/jamapediatrics.2022.0008] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
IMPORTANCE Research has shown that early intervention programs can improve academic outcomes of children with developmental delays. It has been suggested that similar programs may combat the deleterious effects of lead on children's neurodevelopment. However, to our knowledge, there are no published studies examining this possibility. OBJECTIVE The objective of this study was to estimate the association between receipt of early intervention services and third-grade standardized test scores among children exposed to lead before age 3 years. DESIGN, SETTING, AND PARTICIPANTS Cohort study including children born in New York City, New York, from 1994 to 1998 within an administrative data linkage of birth, lead monitoring, early intervention, and education data systems. Participants had a blood lead level of 4 μg/dL or greater at any point before age 3 years and later attended public school in New York City. EXPOSURES Any use of early intervention services from birth through age 3 years. MAIN OUTCOMES AND MEASURES Children who did or did not receive early intervention services were matched using propensity scores. Linear and log-binomial regression were used to estimate the association between receipt of early intervention services before age 3 years and standardized test scores in math and English-language arts in third grade. RESULTS There were 2986 children exposed to lead who received early intervention services before age 36 months. Of these children, 2757 were propensity score-matched to 8160 children who did not receive services. Children who received early intervention services did 7% (95% CI, 3%-12%) of an SD better on math and 10% (95% CI, 5%-14%) of an SD better on English-language arts tests than children who did not receive services. In addition, children who received services were 14% (95% CI, 9%-19%) and 16% (95% CI, 9%-23%) more likely to meet test-based standards in math and English-language arts, respectively, than children who did not receive services. These associations became larger in magnitude when analyses were restricted to children with higher blood lead levels. CONCLUSIONS AND RELEVANCE By leveraging existing public health data, this study found evidence that receipt of early intervention services may benefit the academic performance of children exposed to lead early in life.
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Affiliation(s)
- Jeanette A Stingone
- Department of Epidemiology, Columbia University Mailman School of Public Health, New York, New York
| | - Slavenka Sedlar
- Bureau of Environmental Disease and Injury Prevention, NYC Department of Health and Mental Hygiene, New York, New York
| | - Sungwoo Lim
- Bureau of Epidemiology Services, NYC Department of Health and Mental Hygiene, New York, New York
| | - Katharine H McVeigh
- Bureau of Early Intervention, NYC Department of Health and Mental Hygiene, New York, New York
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Cardenas-Iniguez C, Burnor E, Herting MM. Neurotoxicants, the developing brain, and mental health. BIOLOGICAL PSYCHIATRY GLOBAL OPEN SCIENCE 2022; 2:223-232. [PMID: 35911498 PMCID: PMC9337627 DOI: 10.1016/j.bpsgos.2022.05.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
While life in urban environments may confer a number of benefits, it may also result in a variety of exposures, with toxic consequences for neurodevelopment and neuropsychological health. Neurotoxicants are any of a large number of chemicals or substances that interfere with normal function and/or compromise adaptation in the central and/or peripheral nervous system. Evidence suggests that neurotoxicant effects have a greater effect when occurring in utero and during early childhood. Recent findings exploring neural-level mechanisms provide a crucial opportunity to explore the ways in which environmental conditions may get “under the skin” to impact a number of psychological behaviors and cognitive processes, ultimately allowing for greater synergy between macro- and microlevel efforts to improve mental health in the presence of neurotoxicant exposures. In this review, we provide an overview of 3 types of neurotoxicants related to the built environment and relevant to brain development during childhood and adolescence: lead exposure, outdoor particulate matter pollution, and endocrine-disrupting chemicals. We also discuss mechanisms through which these neurotoxicants affect central nervous system function, including recent evidence from neuroimaging literature. Furthermore, we discuss neurotoxicants and mental health during development in the context of social determinants and how differences in the spatial distribution of neurotoxicant exposures result in health disparities that disproportionately affect low-income and minority populations. Multifaceted approaches incorporating social systems and their effect on neurotoxicant exposures and downstream mental health will be key to reduce societal costs and improve quality of life for children, adolescents, and adults.
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Affiliation(s)
- Carlos Cardenas-Iniguez
- Department of Population and Public Health Sciences, Keck School of Medicine of the University of Southern California, Los Angeles, California
- Address correspondence to Carlos Cardenas-Iniguez, Ph.D.
| | - Elisabeth Burnor
- Department of Population and Public Health Sciences, Keck School of Medicine of the University of Southern California, Los Angeles, California
| | - Megan M. Herting
- Department of Population and Public Health Sciences, Keck School of Medicine of the University of Southern California, Los Angeles, California
- Department of Pediatrics, Children’s Hospital Los Angeles, Los Angeles, California
- Megan M. Herting, Ph.D.
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Dzugkoev SG, Dzugkoeva FS, Margieva OI. Mechanisms of Lead Toxicity and Their Pathogenetic Correction. J EVOL BIOCHEM PHYS+ 2022. [DOI: 10.1134/s0022093022030140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Comprehensive insight into the neurotoxic mechanisms of low dose Pb exposure in Wistar rats: Benchmark dose analysis. Chem Biol Interact 2022; 360:109932. [DOI: 10.1016/j.cbi.2022.109932] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Revised: 03/09/2022] [Accepted: 04/03/2022] [Indexed: 02/03/2023]
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Halabicky OM, Pinto-Martin JA, Compton P, Liu J. Early childhood lead exposure and adolescent heart rate variability: A longitudinal cohort study. ENVIRONMENTAL RESEARCH 2022; 205:112551. [PMID: 34915034 PMCID: PMC9214828 DOI: 10.1016/j.envres.2021.112551] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 11/22/2021] [Accepted: 12/07/2021] [Indexed: 06/01/2023]
Abstract
Lead is a known neurotoxicant with many detrimental health effects, including neurocognitive deficits and cardiovascular and metabolic disorders. However, few studies have tested the association between lead exposure and the physiological stress response, which in and of itself may act as a precursor to and/or underlying mechanism of detrimental health outcomes. The purpose of this study was to examine the influence of early childhood and early adolescent low-level lead exposure on early adolescent heart rate variability, a widely-used measure of physiological stress. Participants were 408 children from Jintan, China for whom blood lead levels were measured between 3 and 5 years (early childhood) and again at 12 years (early adolescence). Heart rate variability was assessed at 12 years while participants underwent an induced stress task utilizing the ratio of low to high frequency (LF/HF) ECG measures. Mean blood lead levels in the cohort were 6.63 mcg/dl and 3.10 mcg/dl at 3-5 years and 12 years, respectively. Blood lead levels at 3-5 years of age (β 0.06, p = 0.027), but not at age 12 (β -0.05, p = 0.465), were significantly associated with LF/HF measures while controlling for multiple sociodemographic variables, potentially reflecting a dysregulated stress response with a shift towards sympathetic dominance. These findings suggest that early childhood lead exposure may have a detrimental influence on early adolescent autonomic responses to acute stress, which holds implications for cardiovascular health and overall growth and development.
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Affiliation(s)
- Olivia M Halabicky
- School of Nursing, University of Pennsylvania, 418 Curie Blvd. Claire M. Fagin Hall, Philadelphia, PA, USA.
| | - Jennifer A Pinto-Martin
- School of Nursing, University of Pennsylvania, 418 Curie Blvd. Claire M. Fagin Hall, Philadelphia, PA, USA; Department of Biostatistics, Epidemiology and Informatics, Perelman School of Medicine, University of Pennsylvania, 34th & Civic Center Blvd., Philadelphia, PA, USA.
| | - Peggy Compton
- School of Nursing, University of Pennsylvania, 418 Curie Blvd. Claire M. Fagin Hall, Philadelphia, PA, USA.
| | - Jianghong Liu
- School of Nursing, University of Pennsylvania, 418 Curie Blvd. Claire M. Fagin Hall, Philadelphia, PA, USA.
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Agboola JB, Ehigie AF, Ehigie LO, Ojeniyi FD, Olayemi AA. Ameliorative role of Syzygium aromaticum aqueous extract on synaptosomal tyrosine hydroxylase activity, oxidative stress parameters, and behavioral changes in lead-induced neurotoxicity in mice. J Food Biochem 2022; 46:e14115. [PMID: 35246863 DOI: 10.1111/jfbc.14115] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 12/27/2021] [Accepted: 01/30/2022] [Indexed: 01/16/2023]
Abstract
This study reports the protective role of the aqueous extract of Syzygium aromaticum (ESA) against lead (Pb)-induced neurotoxicity in mice. Thirty male mice weighing between 18 g and 25 g were randomly divided into five groups. (1) Group 1 (control group), (2) group 2 (Pb-test group): was administered with a solution containing 0.1% (w/v) of lead acetate (PbAc), (3) group 3 (ESA + Pb100 group): was administered with 0.1% (w/v) of PbAc followed by 100 mg/kg of S. aromaticum extract by gavage, (4) group 4 (ESA + Pb200): was administered with 0.1% (w/v) of PbAc followed by 200 mg/kg of S. aromaticum extract, and (5) group 5 (ESA-group): was administered with 100 mg/kg of S. aromaticum. Level of lead was determined by atomic absorption spectroscopy. Cerebral cortex synaptosomes prepared from mice administered orally with lead-acetate shown a significantly increased (p < .05) in tyrosine hydroxylase and protein carbonyl level and significantly decreased (p < .05) superoxide dismutase, glutathione reductase, and glutathione transferase activities. Also, there was a significant increase in brain lead concentration level, however, it was observed that S. aromaticum significantly reduced (p < .05) the level of lead at all tested doses. S. aromaticum rescued cerebral cortex synaptosomes from lead-induced neurotoxicity by relieving oxidative stress and abating elevated tyrosine hydroxylase activity. Moreover, S. aromaticum at the different dose grade (100 mg and 200 mg) abrogated the loss of motor performance in mice groups induced with lead. Altogether, our findings showed that S. aromaticum possesses antioxidant and neuro-modulatory potential against lead-induced neuronal damage. PRACTICAL APPLICATIONS: Environmental pollution with heavy metals is a known public health concern and their incremental concentrations in soil and water have risen to an unprecedented degree. Lead is one of the top 10 contaminants on the WHO's list of substances of greatest public health concern that impact the brain. However, exogenous natural bioactive supplements molecules could be one of the remedies to reduce Pb-induced toxicity. Our findings indicate therefore that, S. aromaticum could be a good fit for lowering Pb neurotoxicity and could be suggested as a neuroprotective molecule against neurodegenerative diseases involving catecholaminergic dysfunction induced by metallic elements.
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Affiliation(s)
- James Busayo Agboola
- Department of Biochemistry and Molecular Biology, Faculty of Sciences, Obafemi Awolowo University, Ile-Ife, Nigeria
| | - Adeola Folashade Ehigie
- Department of Biochemistry, College of Health Sciences, Ladoke Akintola University of Technology, Ogbomoso, Nigeria
| | - Leonard Ona Ehigie
- Department of Biochemistry, College of Health Sciences, Ladoke Akintola University of Technology, Ogbomoso, Nigeria
| | - Fiyinfoluwa Demilade Ojeniyi
- Department of Biochemistry, College of Health Sciences, Ladoke Akintola University of Technology, Ogbomoso, Nigeria
| | - Akintola Adebola Olayemi
- Department of Science Laboratory Technology, Faculty of Pure and Applied Sciences, Ladoke Akintola University of Technology, Ogbomoso, Nigeria
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Lai WQ, Chang YF, Chou FN, Yang DM. Portable FRET-Based Biosensor Device for On-Site Lead Detection. BIOSENSORS 2022; 12:bios12030157. [PMID: 35323427 PMCID: PMC8946079 DOI: 10.3390/bios12030157] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 02/24/2022] [Accepted: 02/28/2022] [Indexed: 05/31/2023]
Abstract
Most methods for measuring environmental lead (Pb) content are time consuming, expensive, hazardous, and restricted to specific analytical systems. To provide a facile, safe tool to detect Pb, we created pMet-lead, a portable fluorescence resonance energy transfer (FRET)-based Pb-biosensor. The pMet-lead device comprises a 3D-printed frame housing a 405-nm laser diode-an excitation source for fluorescence emission images (YFP and CFP)-accompanied by optical filters, a customized sample holder with a Met-lead 1.44 M1 (the most recent version)-embedded biochip, and an optical lens aligned for smartphone compatibility. Measuring the emission ratios (Y/C) of the FRET components enabled Pb detection with a dynamic range of nearly 2 (1.96), a pMet-lead/Pb dissociation constant (Kd) 45.62 nM, and a limit of detection 24 nM (0.474 μg/dL, 4.74 ppb). To mitigate earlier problems with a lack of selectivity for Pb vs. zinc, we preincubated samples with tricine, a low-affinity zinc chelator. We validated the pMet-lead measurements of the characterized laboratory samples and unknown samples from six regions in Taiwan by inductively coupled plasma mass spectrometry (ICP-MS). Notably, two unknown samples had Y/C ratios significantly higher than that of the control (3.48 ± 0.08 and 3.74 ± 0.12 vs. 2.79 ± 0.02), along with Pb concentrations (10.6 ppb and 15.24 ppb) above the WHO-permitted level of 10 ppb in tap water, while the remaining four unknowns showed no detectable Pb upon ICP-MS. These results demonstrate that pMet-lead provides a rapid, sensitive means for on-site Pb detection in water from the environment and in living/drinking supply systems to prevent potential Pb poisoning.
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Affiliation(s)
- Wei-Qun Lai
- Microscopy Service Laboratory, Basic Research Division, Department of Medical Research, Taipei Veterans General Hospital, Taipei 11217, Taiwan; (W.-Q.L.); (F.-N.C.)
- Institute of Biophotonics, School of Biomedical Science and Engineering, National Yang Ming Chiao Tung University, Taipei 11221, Taiwan
| | - Yu-Fen Chang
- LumiSTAR Biotechnology, Inc., Taipei City 115, Taiwan;
| | - Fang-Ning Chou
- Microscopy Service Laboratory, Basic Research Division, Department of Medical Research, Taipei Veterans General Hospital, Taipei 11217, Taiwan; (W.-Q.L.); (F.-N.C.)
| | - De-Ming Yang
- Microscopy Service Laboratory, Basic Research Division, Department of Medical Research, Taipei Veterans General Hospital, Taipei 11217, Taiwan; (W.-Q.L.); (F.-N.C.)
- Institute of Biophotonics, School of Biomedical Science and Engineering, National Yang Ming Chiao Tung University, Taipei 11221, Taiwan
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Protective Effects of Green Tea Supplementation against Lead-Induced Neurotoxicity in Mice. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27030993. [PMID: 35164259 PMCID: PMC8839307 DOI: 10.3390/molecules27030993] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 01/24/2022] [Accepted: 01/28/2022] [Indexed: 11/17/2022]
Abstract
The use of natural products as therapeutic agents is rapidly growing recently. In the current study, we investigated the protective effects of green tea supplementation on lead-induced toxicity in mice. Forty albino mice were divided into four groups as follows: A: control group; B: green tea receiving group; C: lead-intoxicated group; and D: lead-intoxicated group supplemented with green tea. At the end of the experiment, the animals were tested for neurobehavioral and biochemical alterations. Green tea was analyzed through Gas Chromatography–Mass Spectrometry (GC/MS) analysis. We found that supplementation with green tea ameliorated the lead-associated increase in body weight and blood glucose. Green tea supplementation also changed the blood picture that was affected due to lead toxicity and ameliorated lead-induced dyslipidemia. The group of mice that were supplemented with green tea has shown positive alterations in locomotory, anxiety, memory, and learning behaviors. The GC/MS analysis revealed many active ingredients among which the two most abundant were caffeine and 1,2-benzenedicarboxylic acid, mono(2-ethylhexyl) ester. We concluded that green tea supplementation has several positive effects on the lead-induced neurotoxicity in mice and that these effects may be attributed to its main two active ingredients.
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Javorac D, Tatović S, Anđelković M, Repić A, Baralić K, Djordjevic AB, Mihajlović M, Stevuljević JK, Đukić-Ćosić D, Ćurčić M, Antonijević B, Bulat Z. Low-lead doses induce oxidative damage in cardiac tissue: Subacute toxicity study in Wistar rats and Benchmark dose modelling. Food Chem Toxicol 2022; 161:112825. [PMID: 35045334 DOI: 10.1016/j.fct.2022.112825] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 12/28/2021] [Accepted: 01/13/2022] [Indexed: 02/08/2023]
Abstract
Exposure to toxic metals, including lead (Pb), were found as important risk factor for cardiovascular diseases. The aim of the study was to simulate low-level subacute Pb exposure scenario and to determine redox status, redox scores (OXY-score, damage score and protective score) and copper (Cu), zinc (Zn), iron (Fe) and manganese (Mn) levels in cardiac tissue of Wistar rats. Based on the obtained results we have established dose-toxic response relationship and derived Benchmark dose. The male Wistar rats were divided in seven groups (n = 6), six threated groups that received 0.1; 0.5; 1; 3; 7; 15 mg Pb/kg body weight/day for 28 days, by oral gavage and control group. The results of the presented study demonstrated that Pb affect cardiac tissue by inducing production of superoxide anion radical (O2.-) and consequently raising malondialdehyde (MDA) levels. The positive trend in OXY-score and damage score were determined. Effect size analysis showed that the main toxic effects were oxidative damage and elevation of MDA. The lowest BMD was calculated for MDA (2.2e-0.6 mg Pb/kg b.w./day). Obtained BMD may be useful in further assessing point of departure in the human health risks assessment of low-level Pb exposure scenario.
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Affiliation(s)
- Dragana Javorac
- Department of Toxicology "Akademik Danilo Soldatović", University of Belgrade - Faculty of Pharmacy, 11221, Belgrade, Serbia.
| | - Simona Tatović
- Department of Toxicology "Akademik Danilo Soldatović", University of Belgrade - Faculty of Pharmacy, 11221, Belgrade, Serbia
| | | | - Aleksandra Repić
- Institute of Forensic Medicine, Faculty of Medicine University of Belgrade, 11000, Belgrade, Serbia
| | - Katarina Baralić
- Department of Toxicology "Akademik Danilo Soldatović", University of Belgrade - Faculty of Pharmacy, 11221, Belgrade, Serbia
| | - Aleksandra Buha Djordjevic
- Department of Toxicology "Akademik Danilo Soldatović", University of Belgrade - Faculty of Pharmacy, 11221, Belgrade, Serbia
| | - Marija Mihajlović
- Department of Medical Biochemistry, University of Belgrade - Faculty of Pharmacy, 11221, Belgrade, Serbia
| | - Jelena Kotur Stevuljević
- Department of Medical Biochemistry, University of Belgrade - Faculty of Pharmacy, 11221, Belgrade, Serbia
| | - Danijela Đukić-Ćosić
- Department of Toxicology "Akademik Danilo Soldatović", University of Belgrade - Faculty of Pharmacy, 11221, Belgrade, Serbia
| | - Marijana Ćurčić
- Department of Toxicology "Akademik Danilo Soldatović", University of Belgrade - Faculty of Pharmacy, 11221, Belgrade, Serbia
| | - Biljana Antonijević
- Department of Toxicology "Akademik Danilo Soldatović", University of Belgrade - Faculty of Pharmacy, 11221, Belgrade, Serbia
| | - Zorica Bulat
- Department of Toxicology "Akademik Danilo Soldatović", University of Belgrade - Faculty of Pharmacy, 11221, Belgrade, Serbia
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Green synthesis of ZnO@ZnS core–shell nanoparticles for detection of lead and iron ions in aqueous solutions by colorimetric paper sensors. CHEMICAL PAPERS 2022. [DOI: 10.1007/s11696-021-01840-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Merced-Nieves FM, Chelonis J, Pantic I, Schnass L, Téllez-Rojo MM, Braun JM, Paule MG, Wright RJ, Wright RO, Curtin P. Sexually dimorphic associations between prenatal blood lead exposure and performance on a behavioral testing battery in children. Neurotoxicol Teratol 2022; 90:107075. [PMID: 35108597 PMCID: PMC8957713 DOI: 10.1016/j.ntt.2022.107075] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 01/20/2022] [Accepted: 01/25/2022] [Indexed: 10/19/2022]
Abstract
BACKGROUND Associations between lead (Pb) and neurodevelopment have been studied widely in the context of global measures of cognitive function, such as IQ. Operant test batteries consist of behavioral tasks that can be used to target discrete cognitive and behavioral mechanisms, which contribute to global cognitive faculties. OBJECTIVES The goals of this study were to identify Pb-associated deficits in cognitive development and determine the underlying mechanisms involved, utilizing an operant test battery. We evaluated effect modification by child sex. METHODS This study utilized data from a prospective cohort in Mexico City. We included 549 participants aged 6-to-7 years with complete data on prenatal blood Pb measurements, Operant Test Battery (OTB) tasks, and demographic covariates. General linear models were used to examine the association of Pb levels at each prenatal timepoint and OTB performance. Effect modification by child sex was evaluated using 2-way interaction terms. RESULTS In three of the operant tasks, we observed that higher late-pregnancy blood Pb concentrations were associated with greater response latencies. In the temporal processing task, we observed that higher late-pregnancy Pb exposure was associated with worse overall task performance. Further, in two operant tasks, the effects of Pb were dependent on the sex of the child, such that the effects of Pb were more pronounced in females in the condition position responding task, but stronger in males in the temporal processing task. CONCLUSIONS Our results suggest that prenatal Pb concentrations yield broad dysregulation of executive functions, which can be attributed to dysregulation of temporal processing. In addition, we observed sex differences in two operant tasks suggesting that some Pb effects on neurocognitive function may be sexually dimorphic.
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Affiliation(s)
- Francheska M. Merced-Nieves
- Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - John Chelonis
- Division of Neurotoxicology, National Center for Toxicological Research, FDA, Jefferson, AR, USA
| | - Ivan Pantic
- Division of Community Interventions Research, National Institute of Perinatology, Mexico City, Mexico
| | - Lourdes Schnass
- Division of Community Interventions Research, National Institute of Perinatology, Mexico City, Mexico
| | - Martha M. Téllez-Rojo
- Center for Nutrition and Health Research, National Institute of Public Health, Cuernavaca, Morelos, Mexico
| | - Joseph M. Braun
- Department of Epidemiology, Brown University, Providence, RI, USA
| | - Merle G. Paule
- Division of Neurotoxicology, National Center for Toxicological Research, FDA, Jefferson, AR, USA
| | - Rosalind J. Wright
- Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA,Institute for Exposomic Research, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Robert O. Wright
- Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA,Institute for Exposomic Research, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Paul Curtin
- Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA
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Owumi SE, Arunsi UO, Otunla MT, Oluwasuji IO. Exposure to lead and dietary furan intake aggravates hypothalamus-pituitary-testicular axis toxicity in chronic experimental rats. J Biomed Res 2022. [DOI: 10.7555/jbr.36.20220108f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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Latham S, Jennings JL. Reducing lead exposure in school water: Evidence from remediation efforts in New York City public schools. ENVIRONMENTAL RESEARCH 2022; 203:111735. [PMID: 34331917 DOI: 10.1016/j.envres.2021.111735] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 07/15/2021] [Accepted: 07/17/2021] [Indexed: 06/13/2023]
Abstract
Following the Flint Water Crisis, many states passed legislation requiring schools to measure and remediate lead in school drinking water. In this study, we present new evidence on the level and distribution of lead in school drinking water by examining the case of New York City, which tested water from every public school fixture in the 2016-17 school year, remediated fixtures that showed elevated levels of lead above 15 ppb, and retested a sample of fixtures in 2018-19. Prior to remediation, 8 % of fixtures showed elevated levels of lead; after remediation, 5 % of fixtures did. In both pre- and post-remediation periods, Black children attended schools with a higher proportion of elevated fixtures than White, Asian, and Hispanic children. We observe post-remediation lead exposure reductions that were largest for Black children, though racial disparities in exposure remained. Together, our results show that New York City's remediation efforts significantly reduced lead in its schools' drinking water in a short period of time, providing evidence of the promise of such efforts. However, the continued presence of lead in school drinking water and persistent racial disparities in exposure demonstrate the ongoing challenges to eradicating lead exposure in schools.
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Affiliation(s)
- Scott Latham
- Princeton School of Public and International Affairs, Princeton University, 288 Wallace Hall, Princeton, NJ, 08544, USA.
| | - Jennifer L Jennings
- Princeton School of Public and International Affairs, Princeton University, 159 Wallace Hall, Princeton, NJ, 08544, USA.
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Zakharova MN, Bakulin IS, Abramova AA. Toxic Damage to Motor Neurons. NEUROCHEM J+ 2021. [DOI: 10.1134/s1819712421040164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Abstract—Amyotrophic lateral sclerosis (ALS) is a multifactor disease in the development of which both genetic and environmental factors play a role. Specifically, the effects of organic and inorganic toxic substances can result in an increased risk of ALS development and the acceleration of disease progression. It was described that some toxins can induce potentially curable ALS-like syndromes. In this case, the specific treatment for the prevention of the effects of the toxic factor may result in positive clinical dynamics. In this article, we review the main types of toxins that can damage motor neurons in the brain and spinal cord leading to the development of the clinical manifestation of ALS, briefly present historical data on studies on the role of toxic substances, and describe the main mechanisms of the pathogenesis of motor neuron disease associated with their action.
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Javorac D, Antonijević B, Anđelković M, Repić A, Bulat P, Djordjevic AB, Baralić K, Đukić-Ćosić D, Antonić T, Bulat Z. Oxidative stress, metallomics and blood toxicity after subacute low-level lead exposure in Wistar rats: Benchmark dose analyses. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 291:118103. [PMID: 34520949 DOI: 10.1016/j.envpol.2021.118103] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 08/24/2021] [Accepted: 09/02/2021] [Indexed: 06/13/2023]
Abstract
Exposure to lead (Pb) is still rising concern worldwide, having in mind that even low-dose exposure can induce various harmful effects. Thus, in-depth knowledge of the targets of Pb toxicity and corresponding mechanisms is essential. In the presented study, the six groups (male Wistar rats, n = 6) received 0.1; 0.5; 1; 3; 7; 15 mg Pb/kg body weight/day for 28 days, each day by oral gavage, while the control group received distilled water only. All animals were sacrificed 24 h after the treatment, and blood was collected for the analysis of hematological, biochemical, oxidative status and essential elements levels. An external and internal dose-response relationship was performed using PROASTweb 70.1 software. The results showed that low doses of Pb affect hematological parameters and lipid profile after 28 days. The possible mechanisms at examined Pb dose levels were a decrease in SOD, O2•- and Cu and an increase in Zn levels. The dose-dependent nature of changes in cholesterol, HDL cholesterol, O2.-, SOD, AOPP in serum and hemoglobin, Fe, Zn, Cu in blood were obtained in this study. The most sensitive parameters that were alerted are Cu blood levels (BMDL5: 1.4 ng/kg b.w./day) and SOD activity (BMDL5: 0.5 μg/kg b.w./day). The presented results provide information that may be useful in further assessing the health risks of low-level Pb exposure.
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Affiliation(s)
- Dragana Javorac
- Department of Toxicology "Akademik Danilo Soldatović", University of Belgrade - Faculty of Pharmacy, 11221, Belgrade, Serbia.
| | - Biljana Antonijević
- Department of Toxicology "Akademik Danilo Soldatović", University of Belgrade - Faculty of Pharmacy, 11221, Belgrade, Serbia
| | - Milena Anđelković
- Department of Toxicology "Akademik Danilo Soldatović", University of Belgrade - Faculty of Pharmacy, 11221, Belgrade, Serbia; Health Center Kosovska Mitrovica, 38220, Kosovska Mitrovica, Serbia
| | - Aleksandra Repić
- Serbian Institute of Occupational Health "Dr Dragomir Karajović", Belgrade, Serbia
| | - Petar Bulat
- Serbian Institute of Occupational Health "Dr Dragomir Karajović", Belgrade, Serbia; Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Aleksandra Buha Djordjevic
- Department of Toxicology "Akademik Danilo Soldatović", University of Belgrade - Faculty of Pharmacy, 11221, Belgrade, Serbia
| | - Katarina Baralić
- Department of Toxicology "Akademik Danilo Soldatović", University of Belgrade - Faculty of Pharmacy, 11221, Belgrade, Serbia
| | - Danijela Đukić-Ćosić
- Department of Toxicology "Akademik Danilo Soldatović", University of Belgrade - Faculty of Pharmacy, 11221, Belgrade, Serbia
| | - Tamara Antonić
- Department of Biochemistry, University of Belgrade - Faculty of Pharmacy, 11221, Belgrade, Serbia
| | - Zorica Bulat
- Department of Toxicology "Akademik Danilo Soldatović", University of Belgrade - Faculty of Pharmacy, 11221, Belgrade, Serbia
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Fang CW, Ning HC, Huang YC, Chiang YS, Chuang CW, Wang IK, Fan NC, Weng CH, Huang WH, Hsu CW, Yen TH. Trend in blood lead levels in Taiwanese adults 2005-2017. PLoS One 2021; 16:e0260744. [PMID: 34855854 PMCID: PMC8638909 DOI: 10.1371/journal.pone.0260744] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Accepted: 11/16/2021] [Indexed: 12/01/2022] Open
Abstract
This study examined the trend of blood lead levels (BLLs) in Taiwanese adults and analyzed the variations in the BLL between Linkou (northern) and Kaohsiung (southern) hospital branches. Between 2005 and 2017, 3,804 adult participants received blood lead tests at the Linkou (n = 2,674) and Kaohsiung (n = 1,130) branches of Chang Gung Memorial Hospital. The geometric mean of BLL was 2.77 μg/dL. The adult participants from the Kaohsiung branch were not only age older (49.8±14.1 versus 39.4±14.2 years; P<0.001) and male predominant (65.8 versus 41.7%; P<0.001) but also showed a higher BLL (4.45±3.93 versus 2.82±2.42 μg/dL; P<0.001) and lower estimated glomerular filtration rate (87.62±25.94 versus 93.67±23.88; P<0.001) than those from the Linkou branch. Multivariable logistic regression analysis revealed that the Kaohsiung branch [odds ratio (OR): 7.143; 95% confident interval (CI): 5.682–8.929; P<0.001], older age (OR: 1.008; 95% CI: 1.000–1.015; P = 0.043) and reduced estimated glomerular filtration rate (OR: 1.009; 95% CI: 1.004–1.014; P = 0.001) were significant predictors for BLL > 5 μg/dL. Therefore, this study confirmed a continuous decreasing trend in the BLL in Taiwan after banning leaded petrol in 2000.
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Affiliation(s)
- Chun-Wan Fang
- Department of Laboratory Medicine, Chang Gung Memorial Hospital, Taoyuan, Linkou, Taiwan
- Department of Medical Biotechnology and Laboratory Science, College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Hsiao-Chen Ning
- Department of Medical Biotechnology and Laboratory Science, College of Medicine, Chang Gung University, Taoyuan, Taiwan
- Department of Medical Research and Development, Chang Gung Memorial Hospital, Taoyuan, Linkou, Taiwan
| | - Ya-Ching Huang
- Department of Laboratory Medicine, Chang Gung Memorial Hospital, Taoyuan, Linkou, Taiwan
- Department of Medical Biotechnology and Laboratory Science, College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Yu-Shao Chiang
- Department of Laboratory Medicine, Chang Gung Memorial Hospital, Kaohsiung, Taiwan
| | - Chun-Wei Chuang
- Department of Laboratory Medicine, Chang Gung Memorial Hospital, Taoyuan, Linkou, Taiwan
| | - I-Kuan Wang
- Department of Nephrology, China Medical University Hospital, Taichung, Taiwan
- College of Medicine, China Medical University, Taichung, Taiwan
| | - Nai-Chia Fan
- Division of Pediatric General Medicine, Department of Pediatrics, Chang Gung Memorial Hospital, Linkou, Taiwan
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Cheng-Hao Weng
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
- Department of Nephrology, Clinical Poison Center, Kidney Research Center, Center for Tissue Engineering, Chang Gung Memorial Hospital, Linkou, Taiwan
| | - Wen-Hung Huang
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
- Department of Nephrology, Clinical Poison Center, Kidney Research Center, Center for Tissue Engineering, Chang Gung Memorial Hospital, Linkou, Taiwan
| | - Ching-Wei Hsu
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
- Department of Nephrology, Clinical Poison Center, Kidney Research Center, Center for Tissue Engineering, Chang Gung Memorial Hospital, Linkou, Taiwan
| | - Tzung-Hai Yen
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
- Department of Nephrology, Clinical Poison Center, Kidney Research Center, Center for Tissue Engineering, Chang Gung Memorial Hospital, Linkou, Taiwan
- * E-mail:
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Maurice L, Barraza F, Blondet I, Ho-A-Chuck M, Tablon J, Brousse P, Demar M, Schreck E. Childhood lead exposure of Amerindian communities in French Guiana: an isotopic approach to tracing sources. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2021; 43:4741-4757. [PMID: 33974199 DOI: 10.1007/s10653-021-00944-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Accepted: 04/16/2021] [Indexed: 06/12/2023]
Abstract
In French Guiana were detected high lead (Pb) levels in blood of Amerindian people. Lead exposure is a serious hazard that can affect the cognitive and behavior development. People can be exposed to Pb through occupational and environmental sources. Fingerprinting based on stable Pb isotopes in environmental media is often used to trace natural and anthropogenic sources but is rarely paired with blood data. The objective of this study was to determine the main factors associated with high Blood Lead Levels (BLL). Soil, manioc tubers, food bowls, beverages, wild games, lead pellets and children blood were sampled in small villages along the Oyapock River. children BLL ranged between 5.7 and 35 µg dL-1, all exceeding 5 µg dL-1, the reference value proposed in epidemiologic studies for lead poisoning. Among the different dietary sources, manioc tubers and large game contained elevated Pb concentrations while manioc-based dishes were diluted. The isotopes ratios (207Pb/206Pb and 208Pb/206Pb) of children blood overlapped these of lead shots and meals. These first results confirm for the first time, the diary consumption of manioc-based food as the main contributor to Amerindian children's BLL in French Guiana, but don't exclude the occasional exposure to lead bullets by hunting activities. This is a specific health concern, since previous studies have shown that these same villagers present high levels of mercury (Hg). These communities are indeed subject to a double exposure to neurotoxic metals, Hg and Pb, both through their diet. The farming activity is based on manioc growing, and explaining that this ancestral practice can induce serious health risks for the child's development may seriously affect their food balance and cultural cohesion.
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Affiliation(s)
- Laurence Maurice
- Geosciences Environnement Toulouse (GET), Observatoire Midi-Pyrénées, Université de Toulouse, CNRS, 31400, Toulouse, IRD, France.
- Universidad Andina Simón Bolívar, Área de Salud, P.O. Box 17-12-569, N22-80, Quito, Ecuador.
| | - Fiorella Barraza
- Geosciences Environnement Toulouse (GET), Observatoire Midi-Pyrénées, Université de Toulouse, CNRS, 31400, Toulouse, IRD, France
- Department of Renewable Resources, University of Alberta, Edmonton, AB, T6G 2H1, Canada
- Instituto de Cultivos Tropicales (ICT), Tarapoto, Peru
| | - Isalyne Blondet
- Geosciences Environnement Toulouse (GET), Observatoire Midi-Pyrénées, Université de Toulouse, CNRS, 31400, Toulouse, IRD, France
| | | | - Jessy Tablon
- Agence Régionale de Santé (ARS), 97336, Cayenne, French Guiana
| | - Paul Brousse
- Centre Hospitalier Andrée Rosemon (CHAR), Av. des Flamboyants, 97306, Cayenne, French Guiana
| | - Magalie Demar
- Centre Hospitalier Andrée Rosemon (CHAR), Av. des Flamboyants, 97306, Cayenne, French Guiana
| | - Eva Schreck
- Geosciences Environnement Toulouse (GET), Observatoire Midi-Pyrénées, Université de Toulouse, CNRS, 31400, Toulouse, IRD, France
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Lead (Pb) and neurodevelopment: A review on exposure and biomarkers of effect (BDNF, HDL) and susceptibility. Int J Hyg Environ Health 2021; 238:113855. [PMID: 34655857 DOI: 10.1016/j.ijheh.2021.113855] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 09/29/2021] [Accepted: 10/01/2021] [Indexed: 12/13/2022]
Abstract
Lead (Pb) is a ubiquitous environmental pollutant and a potent toxic compound. Humans are exposed to Pb through inhalation, ingestion, and skin contact via food, water, tobacco smoke, air, dust, and soil. Pb accumulates in bones, brain, liver and kidney. Fetal exposure occurs via transplacental transmission. The most critical health effects are developmental neurotoxicity in infants and cardiovascular effects and nephrotoxicity in adults. Pb exposure has been steadily decreasing over the past decades, but there are few recent exposure data from the general European population; moreover, no safe Pb limit has been set. Sensitive biomarkers of exposure, effect and susceptibility, that reliably and timely indicate Pb-associated toxicity are required to assess human exposure-health relationships in a situation of low to moderate exposure. Therefore, a systematic literature review based on PubMed entries published before July 2019 that addressed Pb exposure and biomarkers of effect and susceptibility, neurodevelopmental toxicity, epigenetic modifications, and transcriptomics was conducted. Finally included were 58 original papers on Pb exposure and 17 studies on biomarkers. The biomarkers that are linked to Pb exposure and neurodevelopment were grouped into effect biomarkers (serum brain-derived neurotrophic factor (BDNF) and serum/saliva cortisol), susceptibility markers (epigenetic markers and gene sequence variants) and other biomarkers (serum high-density lipoprotein (HDL), maternal iron (Fe) and calcium (Ca) status). Serum BDNF and plasma HDL are potential candidates to be further validated as effect markers for routine use in HBM studies of Pb, complemented by markers of Fe and Ca status to also address nutritional interactions related to neurodevelopmental disorders. For several markers, a causal relationship with Pb-induced neurodevelopmental toxicity is likely. Results on BDNF are discussed in relation to Adverse Outcome Pathway (AOP) 13 ("Chronic binding of antagonist to N-methyl-D-aspartate receptors (NMDARs) during brain development induces impairment of learning and memory abilities") of the AOP-Wiki. Further studies are needed to validate sensitive, reliable, and timely effect biomarkers, especially for low to moderate Pb exposure scenarios.
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Versatile Cell and Animal Models for Advanced Investigation of Lead Poisoning. BIOSENSORS-BASEL 2021; 11:bios11100371. [PMID: 34677327 PMCID: PMC8533970 DOI: 10.3390/bios11100371] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 10/01/2021] [Accepted: 10/02/2021] [Indexed: 12/30/2022]
Abstract
The heavy metal, lead (Pb) can irreversibly damage the human nervous system. To help understand Pb-induced damage, we applied a genetically encoded Förster resonance energy transfer (FRET)-based Pb biosensor Met-lead 1.44 M1 to two living systems to monitor the concentration of Pb: induced pluripotent stem cell (iPSC)-derived cardiomyocytes as a semi-tissue platform and Drosophila melanogaster fruit flies as an in vivo animal model. Different FRET imaging modalities were used to obtain FRET signals, which represented the presence of Pb in the tested samples in different spatial dimensions. Using iPSC-derived cardiomyocytes, the relationship between beating activity (20–24 beats per minute, bpm) determined from the fluctuation of fluorescent signals and the concentrations of Pb represented by the FRET emission ratio values of Met-lead 1.44 M1 was revealed from simultaneous measurements. Pb (50 μM) affected the beating activity of cardiomyocytes, whereas two drugs that stop the entry of Pb differentially affected this beating activity: verapamil (2 μM) did not reverse the cessation of beating, whereas 2-APB (50 μM) partially restored this activity (16 bpm). The results clearly demonstrate the potential of this biosensor system as an anti-Pb drug screening application. In the Drosophila model, Pb was detected within the adult brain or larval central nervous system (Cha-gal4 > UAS-Met-lead 1.44 M1) using fast epifluorescence and high-resolution two-photon 3D FRET ratio image systems. The tissue-specific expression of Pb biosensors provides an excellent opportunity to explore the possible Pb-specific populations within living organisms. We believe that this integrated Pb biosensor system can be applied to the prevention of Pb poisoning and advanced research on Pb neurotoxicology.
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Patisaul HB, Behl M, Birnbaum LS, Blum A, Diamond ML, Rojello Fernández S, Hogberg HT, Kwiatkowski CF, Page JD, Soehl A, Stapleton HM. Beyond Cholinesterase Inhibition: Developmental Neurotoxicity of Organophosphate Ester Flame Retardants and Plasticizers. ENVIRONMENTAL HEALTH PERSPECTIVES 2021; 129:105001. [PMID: 34612677 PMCID: PMC8493874 DOI: 10.1289/ehp9285] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 07/02/2021] [Accepted: 08/11/2021] [Indexed: 05/26/2023]
Abstract
BACKGROUND To date, the toxicity of organophosphate esters has primarily been studied regarding their use as pesticides and their effects on the neurotransmitter acetylcholinesterase (AChE). Currently, flame retardants and plasticizers are the two largest market segments for organophosphate esters and they are found in a wide variety of products, including electronics, building materials, vehicles, furniture, car seats, plastics, and textiles. As a result, organophosphate esters and their metabolites are routinely found in human urine, blood, placental tissue, and breast milk across the globe. It has been asserted that their neurological effects are minimal given that they do not act on AChE in precisely the same way as organophosphate ester pesticides. OBJECTIVES This commentary describes research on the non-AChE neurodevelopmental toxicity of organophosphate esters used as flame retardants and plasticizers (OPEs). Studies in humans, mammalian, nonmammalian, and in vitro models are presented, and relevant neurodevelopmental pathways, including adverse outcome pathways, are described. By highlighting this scientific evidence, we hope to elevate the level of concern for widespread human exposure to these OPEs and to provide recommendations for how to better protect public health. DISCUSSION Collectively, the findings presented demonstrate that OPEs can alter neurodevelopmental processes by interfering with noncholinergic pathways at environmentally relevant doses. Application of a pathways framework indicates several specific mechanisms of action, including perturbation of glutamate and gamma-aminobutyric acid and disruption of the endocrine system. The effects may have implications for the development of cognitive and social skills in children. Our conclusion is that concern is warranted for the developmental neurotoxicity of OPE exposure. We thus describe important considerations for reducing harm and to provide recommendations for government and industry decision makers. https://doi.org/10.1289/EHP9285.
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Affiliation(s)
- Heather B. Patisaul
- College of Sciences, North Carolina State University, Raleigh, North Carolina, USA
| | - Mamta Behl
- National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, North Carolina, USA
- National Toxicology Program, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, North Carolina, USA
| | - Linda S. Birnbaum
- National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, North Carolina, USA
- National Toxicology Program, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, North Carolina, USA
- Nicholas School of the Environment, Duke University, Durham, North Carolina, USA
| | - Arlene Blum
- Green Science Policy Institute, Berkeley, California, USA
- Department of Chemistry, University of California, Berkeley, Berkeley, California, USA
| | | | | | - Helena T. Hogberg
- Center for Alternatives to Animal Testing, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Carol F. Kwiatkowski
- Green Science Policy Institute, Berkeley, California, USA
- Department of Biological Sciences, North Carolina State University, Raleigh, North Carolina, USA
| | - Jamie D. Page
- Cancer Prevention & Education Society, Meads House, Leighterton, Tetbury, Gloucestershire, UK
| | - Anna Soehl
- Green Science Policy Institute, Berkeley, California, USA
| | - Heather M. Stapleton
- Nicholas School of the Environment, Duke University, Durham, North Carolina, USA
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Ho KJ, Chen TH, Yang CC, Chuang YC, Chuang HY. Interaction of Smoking and Lead Exposure among Carriers of Genetic Variants Associated with a Higher Level of Oxidative Stress Indicators. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18168325. [PMID: 34444074 PMCID: PMC8393757 DOI: 10.3390/ijerph18168325] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 08/01/2021] [Accepted: 08/04/2021] [Indexed: 02/02/2023]
Abstract
Smoking and lead (Pb) exposure increased oxidative stress in human body, and people with some gene variants may be susceptible to Pb and smoking via oxidative stress. The aim of this study is to evaluate oxidative stress by measuring thiobarbituric acid reactive substances (TBARS) and the relationship of lipid peroxidation markers in Pb workers with different gene polymorphisms (rs4673 and rs1050450) in both smokers and nonsmokers. Blood samples were collected from 267 Pb workers who received their annual health examination in the Kaohsiung Medical University Hospital. Glutathione peroxidase 1 (GPx-1) rs1050450 and cytochrome B-245 Alpha Chain (CYBA) rs4673 single-nucleotide polymorphisms (SNP) were analyzed by specific primer-probes using Real-Time PCR methods. The interaction between blood Pb and smoking increased serum levels of TBARS and the ratio of oxidative low-density lipoprotein and low-density lipoprotein (oxLDL/LDL). Analysis of workers with rs1050450 SNPs showed higher blood Pb levels in the workers with CC genotype than those with CT genotype. Smokers had significantly higher blood Pb, alanine transaminase (ALT), TBARS, and OxLDL levels than nonsmokers. TBARS increased 0.009 nmol/mL when blood Pb increased one µg/dL in smokers compared to nonsmokers. The ratio of OxLDL/LDL increased 0.223 when blood Pb increased one µg/dL in smokers compared to nonsmokers. TBARS levels and the ratio of OxLDL/LDL were positively correlated and interacted between blood Pb and smoking after the adjustment of confounders, suggesting that smoking cessation is an important issue in the Pb-exposed working environment.
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Affiliation(s)
- Kuo-Jung Ho
- Department of Public Health, College of Health Sciences, Kaohsiung Medical University, Kaohsiung City 807, Taiwan;
| | - Tzu-Hua Chen
- Department of Family Medicine, Kaohsiung Municipal Ta-Tung Hospital, Kaohsiung Medical University, Kaohsiung City 807, Taiwan;
| | - Chen-Cheng Yang
- Department of Occupational and Environmental Medicine, Kaohsiung Municipal Siaogang Hospital, Kaohsiung Medical University, Kaohsiung City 807, Taiwan;
| | - Yao-Chung Chuang
- Institute for Translation Research in Biomedicine, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung City 833, Taiwan;
| | - Hung-Yi Chuang
- Department of Occupational and Environmental Medicine, Kaohsiung Medical University Hospital, Kaohsiung City 807, Taiwan
- Department of Public Health and Environmental Medicine, College of Medicine, Research Center for Environmental Medicine, Kaohsiung Medical University, Kaohsiung City 807, Taiwan
- Correspondence: ; Tel.: +886-7312-1101
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Huang H, Jin Y, Chen C, Feng M, Wang Q, Li D, Chen W, Xing X, Yu D, Xiao Y. A toxicity pathway-based approach for modeling the mode of action framework of lead-induced neurotoxicity. ENVIRONMENTAL RESEARCH 2021; 199:111328. [PMID: 34004169 DOI: 10.1016/j.envres.2021.111328] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 04/16/2021] [Accepted: 05/11/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND The underlying mechanisms of lead (Pb) toxicity are not fully understood, which makes challenges to the traditional risk assessment. There is growing use of the mode of action (MOA) for risk assessment by integration of experimental data and system biology. The current study aims to develop a new pathway-based MOA for assessing Pb-induced neurotoxicity. METHODS The available Comparative Toxicogenomic Database (CTD) was used to search genes associated with Pb-induced neurotoxicity followed by developing toxicity pathways using Ingenuity Pathway Analysis (IPA). The spatiotemporal sequence of disturbing toxicity pathways and key events (KEs) were identified by upstream regulator analysis. The MOA framework was constructed by KEs in biological and chronological order. RESULTS There were a total of 71 references showing the relationship between lead exposure and neurotoxicity, which contained 2331 genes. IPA analysis showed that the neuroinflammation signaling pathway was the core toxicity pathway in the enriched pathways relevant to Pb-induced neurotoxicity. The upstream regulator analysis demonstrated that the aryl hydrocarbon receptor (AHR) signaling pathway was the upstream regulator of the neuroinflammation signaling pathway (11.76% overlap with upstream regulators, |Z-score|=1.451). Therefore, AHR activation was recognized as the first key event (KE1) in the MOA framework. The following downstream molecular and cellular key events were also identified. The pathway-based MOA framework of Pb-induced neurotoxicity was built starting with AHR activation, followed by an inflammatory response and neuron apoptosis. CONCLUSION Our toxicity pathway-based approach not only advances the development of risk assessment for Pb-induced neurotoxicity but also brings new insights into constructing MOA frameworks of risk assessment for new chemicals.
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Affiliation(s)
- Hehai Huang
- Department of Occupational and Environmental Health, School of Public Health, Sun Yat-sen University, Guangzhou, 510080, China; Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, 510080, China
| | - Yuan Jin
- Department of Toxicology, School of Public Health, Qingdao University, Qingdao, 266071, China
| | - Chuanying Chen
- Department of Occupational and Environmental Health, School of Public Health, Sun Yat-sen University, Guangzhou, 510080, China; Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, 510080, China
| | - Meiyao Feng
- Department of Toxicology, School of Public Health, Qingdao University, Qingdao, 266071, China
| | - Qing Wang
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, 510080, China
| | - Daochuan Li
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, 510080, China
| | - Wen Chen
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, 510080, China
| | - Xiumei Xing
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, 510080, China
| | - Dianke Yu
- Department of Toxicology, School of Public Health, Qingdao University, Qingdao, 266071, China.
| | - Yongmei Xiao
- Department of Occupational and Environmental Health, School of Public Health, Sun Yat-sen University, Guangzhou, 510080, China; Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, 510080, China.
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Yang Y, Wei S, Zhang B, Li W. Recent Progress in Environmental Toxins-Induced Cardiotoxicity and Protective Potential of Natural Products. Front Pharmacol 2021; 12:699193. [PMID: 34305607 PMCID: PMC8296636 DOI: 10.3389/fphar.2021.699193] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Accepted: 06/28/2021] [Indexed: 01/08/2023] Open
Abstract
Humans are unconsciously exposed to environmental toxins including heavy metals as well as various pesticides, which have deleterious effects on human health. Accumulating studies pointed out that exposure to environmental toxins was associated with various cardiopathologic effects. This review summarizes the main mechanisms of cardiotoxicity induced by environmental toxins (cadmium, arsenic and pesticides) and discusses the potential preventive effects of natural products. These findings will provide a theoretical basis and novel agents for the prevention and treatment of environmental toxins-induced cardiotoxicity. Furthermore, the limitations of current studies, future needs and priorities are discussed.
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Affiliation(s)
- Yuanying Yang
- Department of Pharmacy, The Second Xiangya Hospital, Central South University, Changsha, China.,Institute of Clinical Pharmacy, Central South University, Changsha, China
| | - Shanshan Wei
- Department of Pharmacy, The Second Xiangya Hospital, Central South University, Changsha, China.,Institute of Clinical Pharmacy, Central South University, Changsha, China
| | - Bikui Zhang
- Department of Pharmacy, The Second Xiangya Hospital, Central South University, Changsha, China.,Institute of Clinical Pharmacy, Central South University, Changsha, China
| | - Wenqun Li
- Department of Pharmacy, The Second Xiangya Hospital, Central South University, Changsha, China.,Institute of Clinical Pharmacy, Central South University, Changsha, China
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Valcke M, Bourgault MH, Gagné M, Levallois P. A probabilistic toxicokinetic modeling approach to the assessment of the impact of daily variations of lead concentrations in tap water from schools and daycares on blood lead levels in children. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 775:145866. [PMID: 36524623 DOI: 10.1016/j.scitotenv.2021.145866] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Revised: 02/08/2021] [Accepted: 02/09/2021] [Indexed: 06/17/2023]
Abstract
The aim of this study was to assess the impact of exposure to tap water lead concentration ([Pb]TW) occurring in schools or daycares on blood lead level (BLL) of attending children. Given the potentially wide variations in space and time of ([Pb]TW) documented in the literature, a simple probabilistic toxicokinetic (STK) model that allows the simulation of the time-varying evolution of BLL in response to these variations was developed. Thus, basic toxicokinetic equations were assembled to simulate BLL in a typical infant, toddler and pupil. The STK model's steady-state BLL predictions showed good correspondence when validated against Integrated Exposure and Uptake BioKinetic model predictions for comparable [Pb]TW values. Exposures to three distributions of [Pb]TW in specific sets of Canadian schools and daycares documented in the scientific literature were simulated probabilistically with Monte Carlo simulations. For the highest distribution of [Pb]TW simulated (median, 90th percentile = 24, 412 μg/L), average annual BLL (median, 97.5th percentile) varies between 1.5 and 6.4 μg/dL in infant and 1.1 and 3 μg/dL in pupils. Toddler's results were midway between those from the infants and pupils. Under this exposure scenario, the infant may present BLL > 5 μg/dL for a significant number of days over the course of the academic year (median; 97.5th: 17; 227 days). However, peak exposure may remain unnoticed if rare and drowned out by the background BLL. In conclusion, even if they may be sparse, peak exposure episodes to [Pb]TW in schools and daycares may suffice to increased BLL in attending individuals. This finding emphasizes the need for further characterization of [Pb]TW in schools and daycares in order to identify potentially problematic institutions and therefore avoid undesirable exposures for the children attending them.
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Affiliation(s)
- Mathieu Valcke
- Direction de la santé environnementale et de la toxicologie, Institut national de santé publique du Québec, 190 boul. Crémazie Est, Montréal, Québec H2P 1E2, Canada; Département de santé environnementale et de santé au travail, École de santé publique de l'Université de Montréal, Canada.
| | - Marie-Hélène Bourgault
- Direction de la santé environnementale et de la toxicologie, Institut national de santé publique du Québec, 190 boul. Crémazie Est, Montréal, Québec H2P 1E2, Canada
| | - Michelle Gagné
- Direction de la santé environnementale et de la toxicologie, Institut national de santé publique du Québec, 190 boul. Crémazie Est, Montréal, Québec H2P 1E2, Canada
| | - Patrick Levallois
- Direction de la santé environnementale et de la toxicologie, Institut national de santé publique du Québec, 945 avenue Wolfe, Québec, (Quebec) G1V 5B3, Canada; Département de médecine sociale et préventive, Faculté de médecine, Université Laval, Québec, QC, Canada.
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76
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Wade AM, Richter DD, Craft CB, Bao NY, Heine PR, Osteen MC, Tan KG. Urban-Soil Pedogenesis Drives Contrasting Legacies of Lead from Paint and Gasoline in City Soil. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:7981-7989. [PMID: 34019756 DOI: 10.1021/acs.est.1c00546] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
This study analyzed the impact of urban-soil pedogenesis on soil lead (Pb) contamination from paint and gasoline in the historic core of Durham, North Carolina. Total soil Pb in 1000 samples from streetsides, residential properties, and residual upland and floodplains ranged from 6 to 8825 mg/kg (mean = 211 mg/kg), with 50% of samples between 50 and 200 mg/kg soil Pb. The highest Pb concentrations were within 1 m of pre-1978 residential foundations, with concentrations inversely correlated with house age. Streetside soil Pb concentrations were elevated over the geologic background of <30 mg/kg and correlated with traffic flow. Streetside soil Pb concentrations were lower than Durham streetside soils collected in the 1970s, which was attributed to urban pedogenesis, the complex of natural and human processes that change soils over time. Accelerated erosion redistributes legacy Pb and floodplain sampling indicates sedimentation rates of up to 4 mm/year. Mixing and burial of soil with elevated Pb are also lowering soil Pb concentrations over time. These mechanisms are likely of greater significance on streetsides than near foundation soils. The development of an urban-pedogenesis framework can help guide public health approaches to Pb exposure by incorporating pedogenic processes that reduce and dissipate soil Pb contamination.
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Affiliation(s)
- Anna M Wade
- Nicholas School of the Environment, Duke University, P.O. Box 90328, Durham, North Carolina 27708, United States
| | - Daniel D Richter
- Nicholas School of the Environment, Duke University, P.O. Box 90328, Durham, North Carolina 27708, United States
| | - Christopher B Craft
- School of Public and Environmental Affairs, Indiana University, Bloomington, Indiana 47405, United States
| | - Nancy Y Bao
- Nicholas School of the Environment, Duke University, P.O. Box 90328, Durham, North Carolina 27708, United States
| | - Paul R Heine
- Nicholas School of the Environment, Duke University, P.O. Box 90328, Durham, North Carolina 27708, United States
| | - Mary C Osteen
- Nicholas School of the Environment, Duke University, P.O. Box 90328, Durham, North Carolina 27708, United States
| | - Kevin G Tan
- Nicholas School of the Environment, Duke University, P.O. Box 90328, Durham, North Carolina 27708, United States
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77
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Differential impact of heavy metals on neurotoxicity during development and in aging central nervous system. CURRENT OPINION IN TOXICOLOGY 2021. [DOI: 10.1016/j.cotox.2021.04.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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78
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Li T. Time for a change in blood lead reference value for Chinese children. CHEMOSPHERE 2021; 267:128868. [PMID: 33234307 DOI: 10.1016/j.chemosphere.2020.128868] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 10/29/2020] [Accepted: 11/01/2020] [Indexed: 06/11/2023]
Abstract
In China, the first and also the latest version of national childhood lead exposure control guidelines was issued by the National Health Commission in 2006, when the reference value of high blood lead exposure was set at 100 μg/L and lead poisoning was set at 200 μg/L. Lead exposure levels have been decreasing in China over the last few decades, with almost all blood lead concentrations in children under 7 years of age being under 100 μg/L in non-industrial areas. However, lead concentrations lower than 100 μg/L in blood in children are associated with neurodevelopmental deficits. Thus, if the reference value remains at a high level, a large percent of children with exposure levels that are high but lower than the current reference value will be diagnosed as 'safe' and be ignored. Thus, we appeal that the reference value should be lowered according to local actual exposure level. A more stringent reference value would give care givers, doctors, communities, and officials more opportunities to take action earlier.
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Affiliation(s)
- Tao Li
- Child Health Big Data Research Center, Capital Institute of Pediatrics, NO. 2, Yabao Road, Chaoyang District, Beijing, China.
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79
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Deidda I, Russo R, Bonaventura R, Costa C, Zito F, Lampiasi N. Neurotoxicity in Marine Invertebrates: An Update. BIOLOGY 2021; 10:biology10020161. [PMID: 33670451 PMCID: PMC7922589 DOI: 10.3390/biology10020161] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/28/2020] [Revised: 01/20/2021] [Accepted: 02/11/2021] [Indexed: 12/13/2022]
Abstract
Invertebrates represent about 95% of existing species, and most of them belong to aquatic ecosystems. Marine invertebrates are found at intermediate levels of the food chain and, therefore, they play a central role in the biodiversity of ecosystems. Furthermore, these organisms have a short life cycle, easy laboratory manipulation, and high sensitivity to marine pollution and, therefore, they are considered to be optimal bioindicators for assessing detrimental chemical agents that are related to the marine environment and with potential toxicity to human health, including neurotoxicity. In general, albeit simple, the nervous system of marine invertebrates is composed of neuronal and glial cells, and it exhibits biochemical and functional similarities with the vertebrate nervous system, including humans. In recent decades, new genetic and transcriptomic technologies have made the identification of many neural genes and transcription factors homologous to those in humans possible. Neuroinflammation, oxidative stress, and altered levels of neurotransmitters are some of the aspects of neurotoxic effects that can also occur in marine invertebrate organisms. The purpose of this review is to provide an overview of major marine pollutants, such as heavy metals, pesticides, and micro and nano-plastics, with a focus on their neurotoxic effects in marine invertebrate organisms. This review could be a stimulus to bio-research towards the use of invertebrate model systems other than traditional, ethically questionable, time-consuming, and highly expensive mammalian models.
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Abstract
Lead (Pb2+) is a non-essential metal with numerous industrial applications that have led to ts ubiquity in the environment. Thus, not only occupational-exposed individuals' health is compromised, but also that of the general population and in particular children. Notably, although the central nervous system is particularly susceptible to Pb2+, other systems are affected as well. The present study focuses on molecular mechanisms that underlie the effects that arise from the presence of Pb2+ in situ in the brain, and the possible toxic effects that follows. As the brain barriers represent the first target of systemic Pb2+, mechanisms of Pb2+ entry into the brain are discussed, followed by a detailed discussion on neurotoxic mechanisms, with special emphasis on theories of ion mimicry, mitochondrial dysfunction, redox imbalance, and neuroinflammation. Most importantly, the confluence and crosstalk between these events is combined into a cogent mechanism of toxicity, by intertwining recent and old evidences from humans, in vitro cell culture and experimental animals. Finally, pharmacological interventions, including chelators, antioxidants substances, anti-inflammatory drugs, or their combination are reviewed as integrated approaches to ameliorate Pb2+ harmful effects in both developing or adult organisms.
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Affiliation(s)
- Miriam B. Virgolini
- IFEC CONICET. IFEC-CONICET. Departamento de Farmacología, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba. Haya de la Torre y Medina Allende, Ciudad Universitaria, 5016, Córdoba, Argentina
| | - Michael Aschner
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY, USA and IM Sechenov First Moscow State Medical University (Sechenov University), 119146, Moscow, Russia
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81
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Signal transduction associated with lead-induced neurological disorders: A review. Food Chem Toxicol 2021; 150:112063. [PMID: 33596455 DOI: 10.1016/j.fct.2021.112063] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 02/05/2021] [Accepted: 02/09/2021] [Indexed: 12/28/2022]
Abstract
Lead is a heavy metal pollutant that is widely present in the environment. It affects every organ system, yet the nervous system appears to be the most sensitive and primary target. Although many countries have made significant strides in controlling Pb pollution, Pb poisoning continuous to be a major public health concern. Exposure to Pb causes neurotoxicity that ranges from neurodevelopmental disorders to severe neurodegenerative lesions, leading to impairments in learning, memory, and cognitive function. Studies on the mechanisms of Pb-induced nervous system injury have convincingly shown that this metal can affect a plethora of cellular pathways affecting on cell survival, altering calcium dyshomeostasis, and inducing apoptosis, inflammation, energy metabolism disorders, oxidative stress, autophagy and glial stress. This review summarizes recent knowledge on multiple signaling pathways associated with Pb-induced neurological disorders in vivo and in vitro.
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82
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Ruiz-Tudela L, Vázquez-López MA, García-Escobar I, Cabrera-Sevilla JE, Gómez-Bueno S, Martín-Gonzalez M, Muñoz-Vico FJ. Blood Lead Level in a Paediatric Population of South-Eastern Spain and Associated Risk Factors. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18041825. [PMID: 33668485 PMCID: PMC7918575 DOI: 10.3390/ijerph18041825] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Revised: 02/07/2021] [Accepted: 02/10/2021] [Indexed: 11/16/2022]
Abstract
Objective: To determine blood lead levels (BLL) in a healthy paediatric population and to analyse related sociodemographic, dietary and haematological factors. Methods: A cross-sectional study was made of 1427 healthy subjects aged 1–16 years from the city of Almería (south-eastern Spain). BLL, iron parameters and erythropoietin were determined, and sociodemographic and dietary data obtained. The study paramateters was analyses in BLL toxic and BLL no toxic group by multiple logistic regression. Results: The mean BLL was 1.98 ± 1.1 µg/dL (95% CI:1.91–2.04). For 5.7% of the population, mean BLL was 2–5 µg/dL, for 2.1% it was >5 µg/dL and for 0.15% it was >10 µg/dL. Multivariate analysis showed that immigrant origin (OR:11.9; p < 0.0001), low level of parental education (OR:4.6; p < 0.02) and low dietary iron bioavailability (OR: 3.2; p < 0.02) were all risk factors for toxic BLL. Subjects with toxic and non-toxic BLL presented similar iron and erythropoiesis-related parameters, except erythrocyte protoporphyrin, which was significantly higher in the BLL >5 µg/dL group. Conclusions: BLL and the prevalence of toxic BLL in healthy subjects aged 1–16 years living in south-eastern Spain are low and similar to those found in other developed countries. The factors associated with toxic BLL are immigrant origin, low level of parental education and dietary iron deficiency. The toxicity of BLL was not related to changes in the analytical parameters studied.
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Affiliation(s)
- Lucía Ruiz-Tudela
- Departament of Pediatric, Rafael Méndez University Hospital, 30813 Lorca, Spain
- Correspondence: (L.R.-T.); (M.A.V.-L.)
| | - Maria Angeles Vázquez-López
- Departament of Pediatric, Torrecárdenas University Hospital, 04009 Almería, Spain; (I.G.-E.); (S.G.-B.); (M.M.-G.)
- Correspondence: (L.R.-T.); (M.A.V.-L.)
| | - Iciar García-Escobar
- Departament of Pediatric, Torrecárdenas University Hospital, 04009 Almería, Spain; (I.G.-E.); (S.G.-B.); (M.M.-G.)
| | | | - Sara Gómez-Bueno
- Departament of Pediatric, Torrecárdenas University Hospital, 04009 Almería, Spain; (I.G.-E.); (S.G.-B.); (M.M.-G.)
| | - Manuel Martín-Gonzalez
- Departament of Pediatric, Torrecárdenas University Hospital, 04009 Almería, Spain; (I.G.-E.); (S.G.-B.); (M.M.-G.)
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83
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Shaban NZ, Abd El-Kader SE, Mogahed FAK, El-Kersh MAL, Habashy NH. Synergistic protective effect of Beta vulgaris with meso-2,3-dimercaptosuccinic acid against lead-induced neurotoxicity in male rats. Sci Rep 2021; 11:252. [PMID: 33420282 PMCID: PMC7794226 DOI: 10.1038/s41598-020-80669-4] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Accepted: 12/14/2020] [Indexed: 01/29/2023] Open
Abstract
Lead (Pb) toxicity is one of the most prevalent causes of human neurotoxicity. The available chelator drugs used now have many adverse effects. So, in this study, the protective role of Beta vulgaris juice (BVJ) on rat neurotoxicity induced by Pb was evaluated and the results were compared with the results of dimercaptosuccinic acid (DMSA, as used drug). Additionally, the synergistic effect of BVJ and DMSA against Pb-induced neurotoxicity was assessed. The study focused on the determination of the antioxidant, anti-inflammatory, and neurological potential of BVJ (alone, and with DMSA) towards lead-induced neurotoxicity. Also, the characterization of BVJ was studied. The results showed that BVJ contains considerable quantities of polyphenols, triterpenoids, and betalains which play an important role as antioxidants and anti-inflammatory. BVJ exhibited a protective effect against neurotoxicity via the reduction of Pb levels in blood and brain. Moreover, BVJ decreased the oxidative stress, inflammation, and cell death induced by Pb. Also, BVJ regulated the activities of acetylcholine esterase and monoamine oxidase-A which changed by Pb toxicity. BVJ and DMSA combination displayed a synergistic antineurotoxic effect (combination index ˂ 1). These results were in harmony with brain histopathology. Conclusion: BVJ has a powerful efficacy in the protection from brain toxicity via diminishing Pb in the brain and blood circulation, resulting in the prevention of the oxidative and inflammatory stress. Treatment with BVJ in combination with DMSA revealed a synergistic effect in the reduction of neurotoxicity induced by Pb. Also, the antioxidant and anti-inflammatory effects of the BVJ lead to the improvement of DMSA therapy.
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Affiliation(s)
- Nadia Z Shaban
- Biochemistry Department, Faculty of Science, Alexandria University, Alexandria, 21511, Egypt.
| | - Sara E Abd El-Kader
- Biochemistry Department, Faculty of Science, Alexandria University, Alexandria, 21511, Egypt
| | - Fayed A K Mogahed
- Department of Nucleic Acid Research, Genetic Engineering and Biotechnology Research Institute, City of Scientific Research and Technological Applications (SRTA-City), New Borg El-Arab, Alexandria, 21934, Egypt
| | - Mohamed A L El-Kersh
- Biochemistry Department, Faculty of Science, Alexandria University, Alexandria, 21511, Egypt
| | - Noha H Habashy
- Biochemistry Department, Faculty of Science, Alexandria University, Alexandria, 21511, Egypt
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84
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(Ascorb)ing Pb Neurotoxicity in the Developing Brain. Antioxidants (Basel) 2020; 9:antiox9121311. [PMID: 33371438 PMCID: PMC7767447 DOI: 10.3390/antiox9121311] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2020] [Revised: 12/16/2020] [Accepted: 12/17/2020] [Indexed: 12/21/2022] Open
Abstract
Lead (Pb) neurotoxicity is a major concern, particularly in children. Developmental exposure to Pb can alter neurodevelopmental trajectory and has permanent neuropathological consequences, including an increased vulnerability to further stressors. Ascorbic acid is among most researched antioxidant nutrients and has a special role in maintaining redox homeostasis in physiological and physio-pathological brain states. Furthermore, because of its capacity to chelate metal ions, ascorbic acid may particularly serve as a potent therapeutic agent in Pb poisoning. The present review first discusses the major consequences of Pb exposure in children and then proceeds to present evidence from human and animal studies for ascorbic acid as an efficient ameliorative supplemental nutrient in Pb poisoning, with a particular focus on developmental Pb neurotoxicity. In doing so, it is hoped that there is a revitalization for further research on understanding the brain functions of this essential, safe, and readily available vitamin in physiological states, as well to justify and establish it as an effective neuroprotective and modulatory factor in the pathologies of the nervous system, including developmental neuropathologies.
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85
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Van Landingham C, Fuller WG, Schoof RA. The effect of confounding variables in studies of lead exposure and IQ. Crit Rev Toxicol 2020; 50:815-825. [PMID: 33300851 DOI: 10.1080/10408444.2020.1842851] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Methods proposed to address confounding variables frequently do not adequately distinguish confounding from covariation. A confounder is a variable that correlates both with the outcome and the major exposure variable. Accurate treatment of confounding is crucial to low dose extrapolation of the effects of chemical exposures based on epidemiology studies. This study explores the limitations of current regression models in extrapolation to the low dose region of the dose-response curve due to the existence of unrecognized and uncontrolled confounding, using epidemiological data for lead. Based on the reported data in analyses by Lanphear and colleagues and Crump and colleagues, and drawing on other studies, Wilson and Wilson considered maternal IQ, HOME score, SES, parental education, birthweight, smoking, and race as characteristic variables which may have interaction effects. This analysis identifies confounding variables based on the seven longitudinal cohorts in analyses conducted by Lanphear and colleagues and by Crump and colleagues and confirms maternal IQ, HOME score, maternal education and maternal marital status at birth are "Highly Likely" confounders, while race is a "Likely" confounder. The cohort data were reanalyzed using the methods presented by Crump and colleagues while also considering the interaction among the identified confounding variables. This analysis determined that confounders influence IQ estimates in a quantifiable way that may exceed or at least obscure previously-reported effects of blood lead on IQ with blood lead levels below 5 µg/dL; however, limitations in the datasets make predictions of the low dose dose-response analysis questionable.
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86
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Iqubal A, Ahmed M, Ahmad S, Sahoo CR, Iqubal MK, Haque SE. Environmental neurotoxic pollutants: review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:41175-41198. [PMID: 32820440 DOI: 10.1007/s11356-020-10539-z] [Citation(s) in RCA: 66] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2020] [Accepted: 08/16/2020] [Indexed: 05/23/2023]
Abstract
Environmental pollutants are recognized as one of the major concerns for public health and responsible for various forms of neurological disorders. Some of the common sources of environmental pollutants related to neurotoxic manifestations are industrial waste, pesticides, automobile exhaust, laboratory waste, and burning of terrestrial waste. Among various environmental pollutants, particulate matter, ultrafine particulate matter, nanoparticles, and lipophilic vaporized toxicant (acrolein) easily cross the blood-brain barrier, activate innate immune responses in the astrocytes, microglia, and neurons, and exert neurotoxicity. Growing shreds of evidence from human epidemiological studies have correlated the environmental pollutants with neuroinflammation, oxidative stress, endoplasmic reticulum stress, mitochondrial dysfunction, myelin sheath disruption, and alterations in the blood-brain barrier anatomy leading to cognitive dysfunction and poor quality of life. These environmental pollutants also considerably cause developmental neurotoxicity, exhibit teratogenic effect and mental growth retardance, and reduce IQ level. Until now, the exact mechanism of pollutant-induced neurotoxicity is not known, but studies have shown interference of pollutants with the endogenous antioxidant defense system, inflammatory pathway (Nrf2/NF-kB, MAPKs/PI3K, and Akt/GSK3β), modulation of neurotransmitters, and reduction in long-term potentiation. In the current review, various sources of pollutants and exposure to the human population, developmental neurotoxicity, and molecular mechanism of different pollutants involved in the pathogenesis of different neurological disorders have been discussed.
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Affiliation(s)
- Ashif Iqubal
- Department of Pharmacology, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi, 110062, India
| | - Musheer Ahmed
- Department of Pharmaceutics, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi, 110062, India
| | - Shahnawaz Ahmad
- Department of Pharmacology, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi, 110062, India
| | - Chita Ranjan Sahoo
- Central Research Laboratory, Institute of Medical Sciences & Sum Hospital, Siksha 'O' Anusandhan (Deemed to be University), Bhubaneswar, Odisha, 751003, India
| | - Mohammad Kashif Iqubal
- Department of Pharmaceutics, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi, 110062, India
| | - Syed Ehtaishamul Haque
- Department of Pharmacology, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi, 110062, India.
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87
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Redox and essential metal status in the brain of Wistar rats acutely exposed to a cadmium and lead mixture. Arh Hig Rada Toksikol 2020; 71:197-204. [PMID: 33074172 PMCID: PMC7968497 DOI: 10.2478/aiht-2020-71-3425] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Accepted: 09/01/2020] [Indexed: 12/31/2022] Open
Abstract
Most Pb and Cd neurotoxicity studies investigate exposure to either of the toxic metals alone, while data on co-exposure are scarce. The aim of our study was to fill that gap by investigating acute combined effects of Pb and Cd on redox and essential metal status in the brain of Wistar rats. Animals were randomised in four groups of six to eight rats, which received 15 or 30 mg/kg of Cd, 150 mg/kg of Pb, or 150 mg/kg of Pb + 15 mg/kg of Cd by gavage. The fifth, control, group received distilled water only. Co-treatment with Pb and Cd induced significant increase in malondialdehyde (MDA) and thiobarbituric acid-reactive substances (TBARS) compared to control and groups receiving either metal alone. This is of special importance, as MDA presence in the brain has been implicated in many neurodegenerative disorders. The groups did not significantly differ in Zn, Cu, Mn, and Fe brain levels. Our findings highlight the importance of metal mixture studies. Neurotoxicity assessments of single chemicals do not provide a real insight into exposure to mixtures in real life. Further research should look into interactions between these metals to reveal complex molecular mechanisms of their neurotoxicity.
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88
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Shen C, Zhou Y, Tang C, He C, Zuo Z. Developmental exposure to mepanipyrim induces locomotor hyperactivity in zebrafish (Danio rerio) larvae. CHEMOSPHERE 2020; 256:127106. [PMID: 32447115 DOI: 10.1016/j.chemosphere.2020.127106] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 05/14/2020] [Accepted: 05/15/2020] [Indexed: 06/11/2023]
Abstract
Mepanipyrim is a widely used fungicide, and residues of mepanipyrim are frequently detected in commodities. However, the neurotoxicity and underlying mechanisms of mepanipyrim are still insufficiently understood. In this study, zebrafish embryos at 0.5-1.0 post-fertilization hours (hpf) were exposed to 0.1, 1, 10 and 100 μg/L mepanipyrim for 7 days. Our results showed that mepanipyrim could cause the locomotor hyperactivity and increase the concentration of γ-amino butyric acid (GABA) and the Na+/K+- and Ca2+-ATPase activities in zebrafish larvae. We have conducted the RNA-sequence and RT-qPCR to analyze the gene expressions. The mRNA expression levels of calcium/sodium ion conduction associated genes were observably up-regulated, demonstrating that mepanipyrim could enhance the cell energy metabolism, the synaptic transmission and skeletal muscle contraction, which were consistent with the locomotor hyperactivity. Meanwhile, exposure to mepanipyrim could significantly change the gene expression levels of gad1, bdnf, nlgn1, and type A and B GABA receptors in zebrafish larvae. This is the first study focusing on the underlying mechanisms of the neurotoxic effects that are induced by mepanipyrim.
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Affiliation(s)
- Chao Shen
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian, 361005, China
| | - Yixi Zhou
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian, 361005, China
| | - Chen Tang
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian, 361005, China
| | - Chengyong He
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian, 361005, China
| | - Zhenghong Zuo
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen, Fujian, 361005, China; State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, Fujian, 361005, China.
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89
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Sulaiman R, Wang M, Ren X. Exposure to Aluminum, Cadmium, and Mercury and Autism Spectrum Disorder in Children: A Systematic Review and Meta-Analysis. Chem Res Toxicol 2020; 33:2699-2718. [DOI: 10.1021/acs.chemrestox.0c00167] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Rosalind Sulaiman
- Department of Epidemiology and Environmental Health, School of Public Health and Health Professions, The State University of New York, Buffalo, New York 14214, United States
| | - Meng Wang
- Department of Epidemiology and Environmental Health, School of Public Health and Health Professions, The State University of New York, Buffalo, New York 14214, United States
- Research and Education in Energy, Environment and Water Institute, University at Buffalo, Buffalo, New York 14260, United States
| | - Xuefeng Ren
- Department of Epidemiology and Environmental Health, School of Public Health and Health Professions, The State University of New York, Buffalo, New York 14214, United States
- Department of Pharmacology and Toxicology, School of Biomedical Sciences, The State University of New York, Buffalo, New York 14214, United States
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90
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Amyotrophic lateral sclerosis and lead: A systematic update. Neurotoxicology 2020; 81:80-88. [PMID: 32941938 DOI: 10.1016/j.neuro.2020.09.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 08/22/2020] [Accepted: 09/08/2020] [Indexed: 12/12/2022]
Abstract
Heavy metals are considered to be among the leading environmental factors that trigger amyotrophic lateral sclerosis (ALS). However, no convincing biopathological mechanism and therapeutic clinical implication of such metals in ALS pathogenesis have been established. This is partly attributable to the technical and scientific difficulties in demonstrating a direct and causative role of heavy metals in the onset of ALS in patients. However, a body of epidemiological, clinical and experimental evidences suggest that lead (Pb), more than other metals, could actually play a major role in the onset and progression of ALS. Here, to clarify the nature of the association and the causative role of Pb in ALS, we comprehensively reviewed the scientific literature of the last decade with objective database searches and the methods typically adopted in systematic reviews, critically analysing and summarising the various scientifically sound evidence on the relationship between ALS and Pb. From these tasks, we noted a number of multidisciplinary associations between ALS and Pb, and specifically the importance of occupational exposure to Pb in ALS development and/or progression. We also report the possible involvement of TAR DNA binding protein (TDP-43)-based molecular mechanism in Pb-mediated ALS, although these data rely on a single study, which included both in vitro experiments and an animal model, and are therefore still preliminary. Finally, we briefly examined whether this knowledge could inspire new targeted therapies and policies in the fight against ALS.
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91
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Yang DM, Fu TF, Lin CS, Chiu TY, Huang CC, Huang HY, Chung MW, Lin YS, Manurung RV, Nguyen PNN, Chang YF. High-performance FRET biosensors for single-cell and in vivo lead detection. Biosens Bioelectron 2020; 168:112571. [PMID: 32892119 DOI: 10.1016/j.bios.2020.112571] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 08/25/2020] [Accepted: 08/27/2020] [Indexed: 12/31/2022]
Abstract
Forms of lead (Pb) have been insidiously invading human life for thousands of years without obvious signs of their considerable danger to human health. Blood lead level (BLL) is the routine measure used for diagnosing the degree of lead intoxication, although it is unclear whether there is any safe range of BLL. To develop a practical detection tool for living organisms, we engineered a genetically encoded fluorescence resonance energy transfer (FRET)-based Pb2+ biosensor, 'Met-lead 1.44 M1', with excellent performance. Met-lead 1.44 M1 has an apparent dissociation constant (Kd) of 25.97 nM, a detection limit (LOD) of 10 nM (2.0 ppb/0.2 μg/dL), and an enhancement dynamic ratio of nearly ~ 5-fold upon Pb2+ binding. The 10 nM sensitivity of Met-lead 1.44 M1 is five times below the World Health Organization-permitted level of lead in tap water (10 ppb; WHO, 2017), and fifteen times lower than the maximum BLL for children (3 μg/dL). We deployed Met-lead 1.44 M1 to measure Pb2+ concentrations in different living models, including two general human cell lines and one specific line, induced pluripotent stem cell (iPSC)-derived cardiomyocytes, as well as in widely used model species in plant (Arabidopsis thaliana) and animal (Drosophila melanogaster) research. Our results suggest that this new biosensor is suitable for lead toxicological research in vitro and in vivo, and will pave the way toward potential applications for both low BLL measures and rapid detection of environmental lead in its divalent form.
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Affiliation(s)
- De-Ming Yang
- Microscopy Service Laboratory, Basic Research Division, Department of Medical Research, Taipei Veterans General Hospital, Taipei, 11217, Taiwan; Institute of Biophotonics, National Yang-Ming University, 155 Sec-2, Li Nong Street, Taipei, 11221, Taiwan; Biophotonics and Molecular Imaging Research Center (BMIRC), National Yang-Ming University, Taipei, 11221, Taiwan.
| | - Tsai-Feng Fu
- Department of Applied Chemistry, National Chi-Nan University, Nantou, 54561, Taiwan
| | - Choun-Sea Lin
- Agricultural Biotechnology Research Center (ABRC), Academia Sinica, Taipei, 115, Taiwan
| | - Tai-Yu Chiu
- Microscopy Service Laboratory, Basic Research Division, Department of Medical Research, Taipei Veterans General Hospital, Taipei, 11217, Taiwan
| | - Chien-Chang Huang
- Core Facilities for Translational Medicines, BioTReC, Academia Sinica, Taipei, 115, Taiwan
| | - Hsin-Yi Huang
- Microscopy Service Laboratory, Basic Research Division, Department of Medical Research, Taipei Veterans General Hospital, Taipei, 11217, Taiwan; LumiSTAR Biotechnology, Inc., National Biotechnology Research Park, Taipei, 115, Taiwan
| | - Min-Wen Chung
- LumiSTAR Biotechnology, Inc., National Biotechnology Research Park, Taipei, 115, Taiwan
| | - Yu-Syuan Lin
- Microscopy Service Laboratory, Basic Research Division, Department of Medical Research, Taipei Veterans General Hospital, Taipei, 11217, Taiwan
| | - Robeth Viktoria Manurung
- Research Center for Electronics and Telecommunication, Indonesian Institute of Sciences (LIPI), Indonesia
| | | | - Yu-Fen Chang
- LumiSTAR Biotechnology, Inc., National Biotechnology Research Park, Taipei, 115, Taiwan.
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92
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Xue C, Kang B, Su P, Wang D, Zhao F, Zhang J, Wang X, Lang H, Cao Z. MicroRNA-106b-5p participates in lead (Pb 2+)-induced cell viability inhibition by targeting XIAP in HT-22 and PC12 cells. Toxicol In Vitro 2020; 66:104876. [PMID: 32344020 DOI: 10.1016/j.tiv.2020.104876] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 04/20/2020] [Accepted: 04/23/2020] [Indexed: 12/25/2022]
Abstract
Previous studies reported perturbed expressing of X-linked inhibitor of apoptosis protein (XIAP) under lead (Pb) exposure. However, researches on XIAP expression mainly focused on its transcriptional and post-translational regulation, rarely involving post-transcriptional mechanism manipulated by certain indispensable microRNAs (miRNAs). Interestingly, we unveiled that miR-106b-5p, a widely expressed miRNA in various tissues, is up-regulated by Pb2+-induced stress. Moreover, we found a binding site for miR-106b-5p in the 3'-UTR of xiap mRNA using bioinformatics analysis, and provided the evidences that miR-106b-5p can interact and function with this regulatory region via luciferase reporter assay. Our results further showed that miR-106b-5p down-regulates XIAP protein level, and suppression of miR-106b-5p reverses the decrease in both XIAP level and cell viability in Pb2+-treated HT-22 and PC12 cells. In brief, we identified a novel function of miR-106b-5p in the post-transcriptional regulation of XIAP expression associated with Pb neurotoxicity.
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Affiliation(s)
- Chong Xue
- Department of Occupational & Environmental Health and the Ministry of Education Key Lab of Hazard Assessment and Control in Special Operational Environment, School of Public Health, Air Force Military Medical University, Xi'an 710032, China
| | - Beipei Kang
- Department of Occupational & Environmental Health and the Ministry of Education Key Lab of Hazard Assessment and Control in Special Operational Environment, School of Public Health, Air Force Military Medical University, Xi'an 710032, China; Department of Clinical Laboratory, Xijing Hospital, Air Force Military Medical University, Xi'an 710032, China
| | - Peng Su
- Department of Occupational & Environmental Health and the Ministry of Education Key Lab of Hazard Assessment and Control in Special Operational Environment, School of Public Health, Air Force Military Medical University, Xi'an 710032, China
| | - Diya Wang
- Department of Occupational & Environmental Health and the Ministry of Education Key Lab of Hazard Assessment and Control in Special Operational Environment, School of Public Health, Air Force Military Medical University, Xi'an 710032, China
| | - Fang Zhao
- Department of Occupational & Environmental Health and the Ministry of Education Key Lab of Hazard Assessment and Control in Special Operational Environment, School of Public Health, Air Force Military Medical University, Xi'an 710032, China
| | - Jianbin Zhang
- Department of Occupational & Environmental Health and the Ministry of Education Key Lab of Hazard Assessment and Control in Special Operational Environment, School of Public Health, Air Force Military Medical University, Xi'an 710032, China
| | - Xiaojing Wang
- Department of Occupational & Environmental Health and the Ministry of Education Key Lab of Hazard Assessment and Control in Special Operational Environment, School of Public Health, Air Force Military Medical University, Xi'an 710032, China; Department of Neurology and Endocrinology, 989 Hospital of PLA, Pingdingshan 467021, China
| | - Haiyang Lang
- School of Public Health, Air Force Military Medical University, Xi'an 710032, China.
| | - Zipeng Cao
- Department of Occupational & Environmental Health and the Ministry of Education Key Lab of Hazard Assessment and Control in Special Operational Environment, School of Public Health, Air Force Military Medical University, Xi'an 710032, China.
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93
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Reference values for heavy metals in the urine and blood of Saudi women derived from two human biomonitoring studies. Int J Hyg Environ Health 2020; 225:113473. [DOI: 10.1016/j.ijheh.2020.113473] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 01/13/2020] [Accepted: 01/29/2020] [Indexed: 12/21/2022]
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94
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Yang DM, Manurung RV, Lin YS, Chiu TY, Lai WQ, Chang YF, Fu TF. Monitoring the Heavy Metal Lead Inside Living Drosophila with a FRET-Based Biosensor. SENSORS (BASEL, SWITZERLAND) 2020; 20:E1712. [PMID: 32204388 PMCID: PMC7146181 DOI: 10.3390/s20061712] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 03/16/2020] [Accepted: 03/18/2020] [Indexed: 01/06/2023]
Abstract
The harmful impact of the heavy metal lead on human health has been known for years. However, materials that contain lead remain in the environment. Measuring the blood lead level (BLL) is the only way to officially evaluate the degree of exposure to lead. The so-called "safe value" of the BLL seems to unreliably represent the secure threshold for children. In general, lead's underlying toxicological mechanism remains unclear and needs to be elucidated. Therefore, we developed a novel genetically encoded fluorescence resonance energy transfer (FRET)-based lead biosensor, Met-lead, and applied it to transgenic Drosophila to perform further investigations. We combined Met-lead with the UAS-GAL4 system to the sensor protein specifically expressed within certain regions of fly brains. Using a suitable imaging platform, including a fast epifluorescent or confocal laser-scanning/two-photon microscope with high resolution, we recorded the changes in lead content inside fly brains ex vivo and in vivo and at different life stages. The blood-brain barrier was found to play an important role in the protection of neurons in the brain against damage due to the heavy metal lead, either through food or microinjection into the abdomen. Met-lead has the potential to be a powerful tool for the sensing of lead within living organisms by employing either a fast epi-FRET microscope or high-resolution brain imaging.
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Affiliation(s)
- De-Ming Yang
- Microscopy Service Laboratory, Basic Research Division, Department of Medical Research, Taipei Veterans General Hospital, Taipei 11217, Taiwan;
- Institute of Biophotonics, School of Medical Technology & Engineering, National Yang-Ming University, Taipei 11221, Taiwan; (Y.-S.L.); (T.-Y.C.)
- Biophotonics and Molecular Imaging Research Center (BMIRC), National Yang-Ming University, Taipei 112, Taiwan
| | - Robeth Viktoria Manurung
- Research Center for Electronics and Telecommunication, Indonesian Institute of Sciences (LIPI), Bandung 40135, Indonesia;
| | - Yu-Syuan Lin
- Institute of Biophotonics, School of Medical Technology & Engineering, National Yang-Ming University, Taipei 11221, Taiwan; (Y.-S.L.); (T.-Y.C.)
| | - Tai-Yu Chiu
- Institute of Biophotonics, School of Medical Technology & Engineering, National Yang-Ming University, Taipei 11221, Taiwan; (Y.-S.L.); (T.-Y.C.)
| | - Wei-Qun Lai
- Microscopy Service Laboratory, Basic Research Division, Department of Medical Research, Taipei Veterans General Hospital, Taipei 11217, Taiwan;
- Institute of Biophotonics, School of Medical Technology & Engineering, National Yang-Ming University, Taipei 11221, Taiwan; (Y.-S.L.); (T.-Y.C.)
| | - Yu-Fen Chang
- LumiSTAR Biotechnology, Inc., Taipei City 115, Taiwan;
| | - Tsai-Feng Fu
- Department of Applied Chemistry, National Chi-Nan University, Nantou 54561, Taiwan;
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95
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Zhao J, Zhang Q, Zhang B, Xu T, Yin D, Gu W, Bai J. Developmental exposure to lead at environmentally relevant concentrations impaired neurobehavior and NMDAR-dependent BDNF signaling in zebrafish larvae. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 257:113627. [PMID: 31796321 DOI: 10.1016/j.envpol.2019.113627] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 11/12/2019] [Accepted: 11/13/2019] [Indexed: 06/10/2023]
Abstract
Lead (Pb) is one of the predominant heavy metals in e-waste recycling arears and recognized as a notorious environmental neurotoxic substance. However, whether Pb at environmentally relevant concentrations could cause neurobehavioral alteration and even what kind of signaling pathway Pb exposure would disrupt in zebrafish were not fully uncovered. In the present study, 6 h postfertilization (hpf) zebrafish embryos were exposed to Pb at the concentrations of 0, 5, 10, and 20 μg/L until 144 hpf. Then the neurobehavioral indicators including locomotor, turnings and social behaviors, and the expressions of selected genes concerning brain-derived neurotrophic factor (BDNF) signaling were investigated. The results showed that significant changes were obtained under 20 μg/L Pb exposure. The hypoactivity of zebrafish larvae in locomotor and turning behaviors was induced during the dark period, while hyperactivity was observed in a two-fish social assay during the light period. The significantly downregulation of genes encoding BDNF, its receptor TrkB, and N-methyl-D-aspartate glutamate receptor (NMDAR) suggested the involvement of NMDAR-dependent BDNF signaling pathway. Overall, our study demonstrated that developmental exposure to Pb at environmentally relevant concentrations caused obvious neurobehavioral impairment of zebrafish larvae by disrupting the NMDAR-dependent BDNF signaling, which could exert profound ecological consequences in the real environment.
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Affiliation(s)
- Jing Zhao
- WEEE Research Centre of Shanghai Polytechnic University, Shanghai Collaborative Innovation Centre for WEEE Recycling, Shanghai, 201209, China; Research Center of Resource Recycling Science and Engineering, Shanghai Polytechnic University, Shanghai, 201209, China
| | - Qing Zhang
- WEEE Research Centre of Shanghai Polytechnic University, Shanghai Collaborative Innovation Centre for WEEE Recycling, Shanghai, 201209, China; Research Center of Resource Recycling Science and Engineering, Shanghai Polytechnic University, Shanghai, 201209, China
| | - Bin Zhang
- Key Laboratory of Yangtze River Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
| | - Ting Xu
- Key Laboratory of Yangtze River Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China.
| | - Daqiang Yin
- Key Laboratory of Yangtze River Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
| | - Weihua Gu
- WEEE Research Centre of Shanghai Polytechnic University, Shanghai Collaborative Innovation Centre for WEEE Recycling, Shanghai, 201209, China; Research Center of Resource Recycling Science and Engineering, Shanghai Polytechnic University, Shanghai, 201209, China
| | - Jianfeng Bai
- WEEE Research Centre of Shanghai Polytechnic University, Shanghai Collaborative Innovation Centre for WEEE Recycling, Shanghai, 201209, China; Research Center of Resource Recycling Science and Engineering, Shanghai Polytechnic University, Shanghai, 201209, China
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96
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Xu T, Dai H, Jin Y. Electrochemical sensing of lead(II) by differential pulse voltammetry using conductive polypyrrole nanoparticles. Mikrochim Acta 2019; 187:23. [DOI: 10.1007/s00604-019-4027-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Accepted: 11/09/2019] [Indexed: 12/24/2022]
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97
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Doyi INY, Isley CF, Soltani NS, Taylor MP. Human exposure and risk associated with trace element concentrations in indoor dust from Australian homes. ENVIRONMENT INTERNATIONAL 2019; 133:105125. [PMID: 31634663 DOI: 10.1016/j.envint.2019.105125] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Revised: 08/23/2019] [Accepted: 08/23/2019] [Indexed: 05/22/2023]
Abstract
This study examines residential indoor dust from 224 homes in Sydney, Australia for trace element concentrations measured using portable X-ray Fluorescence (pXRF) and their potential risk of harm. Samples were collected as part of a citizen science program involving public participation via collection and submission of vacuum dust samples for analysis of their As, Cr, Cu, Mn, Ni, Pb and Zn concentrations. The upper 95% confidence level of the mean values for 224 samples (sieved to <250 μm) were 20.2 mg/kg As, 99.8 mg/kg Cr, 298 mg/kg Cu, 247 mg/kg Mn, 56.7 mg/kg Ni, 364 mg/kg Pb and 2437 mg/kg Zn. The spatial patterns and variations of the metals indicate high homogeneity across Sydney, but with noticeably higher Pb values in the older areas of the city. Potential hazard levels were assessed using United States Environmental Protection Agency's (US EPA) carcinogenic, non-carcinogenic and Integrated Exposure Uptake Biokinetic (IEUBK) model human health risk assessment tools for children and adults. US EPA hazard indexes (HI) for Cr and Pb were higher than the safe level of 1.0 for children. HI > 1 suggests potential non-carcinogenic health effects. Carcinogenic risks were estimated for As, Cr and Pb whose carcinogenic slope factors (CSF) were available. Only the risk factor for Cr exceeded the US EPA's carcinogenic threshold (1 × 10-4) for children. Children aged 1-2 years had the highest predicted mean child blood lead (PbB) of 4.6 μg/dL, with 19.2% potentially having PbB exceeding 5 μg/dL and 5.80% exceeding 10 μg/dL. The Cr and Pb levels measured in indoor dust therefore pose potentially significant adverse health risks to children.
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Affiliation(s)
- Israel N Y Doyi
- Department of Environmental Sciences, Faculty of Science & Engineering, Macquarie University, Sydney, NSW 2109, Australia.
| | - Cynthia Faye Isley
- Department of Environmental Sciences, Faculty of Science & Engineering, Macquarie University, Sydney, NSW 2109, Australia
| | - Neda Sharifi Soltani
- Department of Environmental Sciences, Faculty of Science & Engineering, Macquarie University, Sydney, NSW 2109, Australia
| | - Mark Patrick Taylor
- Department of Environmental Sciences, Faculty of Science & Engineering, Macquarie University, Sydney, NSW 2109, Australia.
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98
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Ruebner RL, Hooper SR, Parrish C, Furth SL, Fadrowski JJ. Environmental lead exposure is associated with neurocognitive dysfunction in children with chronic kidney disease. Pediatr Nephrol 2019; 34:2371-2379. [PMID: 31327061 PMCID: PMC6800774 DOI: 10.1007/s00467-019-04306-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Revised: 07/02/2019] [Accepted: 07/10/2019] [Indexed: 12/11/2022]
Abstract
BACKGROUND Environmental lead exposure is associated with cognitive impairment in healthy children, with deficits seen in intelligence quotient (IQ), attention, and behavior. Neurocognitive dysfunction is also a well-described complication among children with chronic kidney disease (CKD). The objective was to evaluate the association between blood lead levels (BLL) and performance on neurocognitive assessments in a cohort of children with CKD. METHODS Cross-sectional study of children with mild to moderate CKD from the Chronic Kidney Disease in Children (CKiD) multicenter prospective cohort study. The primary exposure was BLL. The primary outcome was performance on age-specific neurocognitive assessments evaluating IQ, executive functioning, attention, hyperactivity, and behavior. Multivariable linear regression was used to evaluate the association between BLL and neurocognitive performance, adjusted for key sociodemographic and clinical variables. RESULTS A total of 412 subjects were included with median age 15.4 years, median estimated GFR 39 mL/min/1.732, median BLL 1.2 mcg/dL, and median IQ score 99. In multivariable linear regression, higher BLL was associated with significantly lower IQ score (- 2.1 IQ points for every 1-mcg/dL increase in BLL, p = 0.029). Higher BLL was associated with worse scores on the Conners' Continuous Performance Test II Variability T-Score, a measure of inattention (+ 1.8 T-Score points for every 1-mcg/dL increase in BLL, p = 0.033). CONCLUSIONS Low-level lead exposure is associated with significantly lower IQ and more inattention in children with CKD, a population already at high risk for neurocognitive dysfunction. Universal screening for elevated BLL should be considered for all children with CKD at age 12-24 months.
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Affiliation(s)
- Rebecca L. Ruebner
- Division of Pediatric Nephrology, Johns Hopkins University School of Medicine, 200 N Wolfe St, Room 3055, Baltimore, MD 21287, USA
| | - Stephen R. Hooper
- Departments of Allied Health Sciences and Psychiatry, School of Medicine, University of North Carolina-Chapel Hill, Chapel Hill, NC, USA
| | - Carisa Parrish
- Division of Pediatric Nephrology, Johns Hopkins University School of Medicine, 200 N Wolfe St, Room 3055, Baltimore, MD 21287, USA,Division of Child and Adolescent Psychiatry, Pediatric Medical Psychology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Susan L. Furth
- Division of Nephrology, Children’s Hospital of Philadelphia, Philadelphia, PA, USA
| | - Jeffrey J. Fadrowski
- Division of Pediatric Nephrology, Johns Hopkins University School of Medicine, 200 N Wolfe St, Room 3055, Baltimore, MD 21287, USA
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99
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Neurobehavioral effects of acute and chronic lead exposure in a desert rodent Meriones shawi: Involvement of serotonin and dopamine. J Chem Neuroanat 2019; 102:101689. [PMID: 31580902 DOI: 10.1016/j.jchemneu.2019.101689] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Revised: 09/26/2019] [Accepted: 09/27/2019] [Indexed: 11/22/2022]
Abstract
Lead (Pb) is a non physiological metal that has been implicated in toxic processes affecting several organs and biological systems, including the central nervous system. Several studies have focused on changes in lead-associated neurobehavioral and neurochemical alterations that occur due to Pb exposure. The present study evaluates the effects of acute and chronic Pb acetate exposure on serotoninergic and dopaminergic systems within the dorsal raphe nucleus, regarding motor activity and anxiety behaviours. Experiments were carried out on adult male Meriones shawi exposed to acute lead acetate intoxication (25 mg/kg b.w., 3 i.p. injections) or to a chronic lead exposure (0,5%) in drinking water from intrauterine age to adult age. Immunohistochemical staining demonstrated that both acute and chronic lead exposure increased anti-serotonin (anti-5HT) and tyrosine hydroxylase (anti-TH) immuno-reactivities in the dorsal raphe nucleus. In parallel, our results demonstrated that a long term Pb-exposure, but not an acute lead intoxication, induced behavioural alterations including, hyperactivity (open field test), and anxiogenic like-effects. Such neurobehavioral impairments induced by Pb-exposure in Meriones shawi may be related to dopaminergic and serotoninergic injuries identified in the dorsal raphe nucleus.
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