1
|
Lin JJY, Kuiper JR, Dickerson AS, Buckley JP, Volk HE, Rohlman DS, Lawrence KG, Braxton Jackson W, Sandler DP, Engel LS, Rule AM. Associations of a toenail metal mixture with attention and memory in the Gulf long-term follow-up (GuLF) study. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 935:173387. [PMID: 38788945 PMCID: PMC11170656 DOI: 10.1016/j.scitotenv.2024.173387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 03/31/2024] [Accepted: 05/18/2024] [Indexed: 05/26/2024]
Abstract
BACKGROUND Research on metal-associated neurodegeneration has largely focused on single metals. Since metal exposures typically co-occur as combinations of both toxic and essential elements, a mixtures framework is important for identifying risk and protective factors. This study examined associations between toenail levels of an eight-metal mixture and attention and memory in men living in US Gulf states. METHODS We measured toenail concentrations of toxic (arsenic, chromium, lead, and mercury) and essential (copper, manganese, selenium, and zinc) metals in 413 non-smoking men (23-69 years, 46 % Black) from the Gulf Long-Term Follow-Up (GuLF) Study. Sustained attention and working memory were assessed at the time of toenail sample collection using the continuous performance test (CPT) and digit span test (DST), respectively. Associations between toenail metal concentrations and performance on neurobehavioral tests were characterized using co-pollutant adjusted general linear models and Bayesian Kernel Machine Regression. RESULTS Adjusting for other metals, one interquartile range (IQR) increase in toenail chromium was associated with a 0.19 (95 % CI: -0.31, -0.07) point reduction in CPT D Prime score (poorer ability to discriminate test signals from noise). One IQR increase in toenail manganese was associated with a 0.20 (95 % CI, -0.41, 0.01) point reduction on the DST Reverse Count (fewer numbers recalled). Attention deficits were greater among Black participants compared to White participants for the same increase in toenail chromium concentrations. No evidence of synergistic interaction between metals or adverse effect of the overall metal mixture was observed for either outcome. CONCLUSIONS Our findings support existing studies of manganese-related memory deficits and are some of the first to show chromium related attention deficits in adults. Longitudinal study of cognitive decline is needed to verify chromium findings. Research into social and chemical co-exposures is also needed to explain racial differences in metal-associated neurobehavioral deficits observed in this study.
Collapse
Affiliation(s)
- Joyce J Y Lin
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA.
| | - Jordan R Kuiper
- Department of Environmental and Occupational Health, The George Washington University Milken Institute School of Public Health, Washington, DC, USA
| | - Aisha S Dickerson
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Jessie P Buckley
- Department of Epidemiology, University of North Carolina Gillings School of Global Public Health, Chapel Hill, NC, USA
| | - Heather E Volk
- Department of Mental Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Diane S Rohlman
- Department of Occupational and Environmental Health, University of Iowa College of Public Health, Iowa City, IA, USA
| | - Kaitlyn G Lawrence
- Epidemiology Branch, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC, USA
| | | | - Dale P Sandler
- Epidemiology Branch, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC, USA
| | - Lawrence S Engel
- Department of Epidemiology, University of North Carolina Gillings School of Global Public Health, Chapel Hill, NC, USA; Epidemiology Branch, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC, USA
| | - Ana M Rule
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| |
Collapse
|
2
|
Arbova DL, Tolmachev SY, Brockman JD. A multi-collector ICP-MS method for quantification of plutonium, uranium, and americium in hair and nails of occupationally or medically exposed individuals. Talanta 2024; 270:125607. [PMID: 38169274 DOI: 10.1016/j.talanta.2023.125607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2023] [Revised: 12/12/2023] [Accepted: 12/27/2023] [Indexed: 01/05/2024]
Abstract
The 239Pu, 238U, and 241Am concentrations and 239Pu/240Pu, 235U/238U, and 236U/238U atom ratios were measured in the hair and nail samples using a new method utilized TEVA, UTEVA, and DGA extraction chromatography and multi-collector ICP-MS. Samples were collected from individuals who donated their bodies to the United States Transuranium and Uranium Registries. The concentration of 239Pu ranged from 0.22 to 15.8 ng/kg. The 240Pu/239Pu isotopic ratios ranged from 0.026 to 0.127 which is consistent with weapons-grade plutonium. Concentration of uranium fell between 1.84 μg/kg and 29.5 μg/kg and 235U/238U ratios ranged from 4.8 × 10-3 to 7.6 × 10-3. Elevated 236U/238U atom ratios were measured in two cases and ranged from 5.0 × 10-6 - 2.4 × 10-5 indicating exposure to spent or reprocessed uranium material. The concentration of 241Am was measured in four hair samples and ranged from 0.02 to 0.21 ng/kg.
Collapse
Affiliation(s)
- D L Arbova
- Pacific Northwest National Laboratory, Richland, WA 99354, United States; Department of Chemistry, University of Missouri, Columbia, MO 65211, United States
| | - S Y Tolmachev
- United States Transuranium and Uranium Registries, College of Pharmacy and Pharmaceutical Sciences, Washington State University, Richland, WA 99354, United States
| | - J D Brockman
- Department of Chemistry, University of Missouri, Columbia, MO 65211, United States; Research Reactor, University of Missouri, Columbia, MO 65211, United States.
| |
Collapse
|
3
|
Bauer JA, Romano ME, Jackson BP, Bellinger D, Korrick S, Karagas MR. Associations of Perinatal Metal and Metalloid Exposures with Early Child Behavioral Development Over Time in the New Hampshire Birth Cohort Study. EXPOSURE AND HEALTH 2024; 16:135-148. [PMID: 38694196 PMCID: PMC11060719 DOI: 10.1007/s12403-023-00543-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 01/13/2023] [Accepted: 03/01/2023] [Indexed: 05/04/2024]
Abstract
Research on the neurodevelopmental effects of metal(loid)s has focused mainly on outcomes assessed at one time point, even though brain development progresses over time. We investigated biomarkers of perinatal exposure to metals and changes in child behavior over time. We followed 268 participants from the prospective New Hampshire Birth Cohort Study between birth and age 5 years. We measured arsenic (As), copper (Cu), manganese (Mn), lead (Pb), selenium (Se), and zinc (Zn) in toenails from 6-week-old infants. The Behavioral Symptoms Index (BSI), externalizing, and internalizing symptoms were assessed using the Behavior Assessment System for Children, 2nd edition (BASC-2) at ages 3 and 5 years. Multivariable linear regression was used to estimate associations of metals with behavior change, calculated as the difference in symptom raw scores between 3 and 5 years, in addition to the associations for symptom scores at 3 and 5 years separately. Sex-specific associations were also explored using stratified models and a sex-metal interaction term. Adjusted associations of metals and change in behavior varied by exposure and outcome. Each 1 μg/g increase in ln toenail Cu was associated with improved behavior between 3 and 5 years [BSI: β = - 3.88 (95%CI: - 7.12, - 0.64); Externalizing problems: β = - 2.20 (95%CI: - 4.07, - 0.33)]. Increasing Zn was associated with increased externalizing behavior over time (β = 3.42 (95%CI: 0.60, 6.25). Sex-stratified analyses suggested more pronounced associations among boys compared to girls. Perinatal exposure to metals may alter behavioral development between ages 3 and 5 years. Findings support the need for more research on associations between metals and neurodevelopment over longer time periods.
Collapse
Affiliation(s)
- Julia A. Bauer
- Department of Epidemiology, Geisel School of Medicine, Dartmouth College, 1 Medical Center Dr., Lebanon, Hanover, NH 03756, USA
| | - Megan E. Romano
- Department of Epidemiology, Geisel School of Medicine, Dartmouth College, 1 Medical Center Dr., Lebanon, Hanover, NH 03756, USA
| | - Brian P. Jackson
- Department of Earth Sciences, Dartmouth College, Hanover, NH, USA
| | - David Bellinger
- Departments of Neurology and Psychiatry, Boston Children’s Hospital, Boston, MA, USA
- Departments of Neurology and Psychiatry, Harvard Medical School, Boston, MA, USA
| | - Susan Korrick
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA
- Channing Division of Network Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, USA
| | - Margaret R. Karagas
- Department of Epidemiology, Geisel School of Medicine, Dartmouth College, 1 Medical Center Dr., Lebanon, Hanover, NH 03756, USA
| |
Collapse
|
4
|
Li S, Yang C, Yi X, Wei R, Aschner M, Jiang Y, Ou S, Yao C. Effects of Sub-chronic Lead Exposure on Essential Element Levels in Mice. Biol Trace Elem Res 2023; 201:282-293. [PMID: 35133610 DOI: 10.1007/s12011-022-03137-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Accepted: 01/23/2022] [Indexed: 01/11/2023]
Abstract
Lead (Pb), a corrosion-resistant heavy non-ferrous metal, is one of the most common environmental neurotoxic metals. The effects of Pb on other essential metal elements are contradictory. Therefore, this in vivo study addressed the effects of sub-chronic Pb exposure on the distribution of other divalent metals, exploring the relationships between Pb levels in blood, teeth, bones, hair, and brain tissues. Thirty-two healthy male C57BL/6 mice received intragastric administration (i.g.) with 0, 12.5, 25, and 50 mg/kg Pb acetate, once a day for 8 weeks. Levels of Pb and other metal elements [including iron(Fe), zinc (Zn), magnesium (Mg), copper (Cu), and calcium(Ca)] in the whole blood, teeth, the right thighbone, hair, and brain tissues (including cortex, hippocampus, striatum, and hypothalamus) were detected with inductively coupled plasma-mass spectrometry (ICP-MS). Pb levels in all detected organs were increased after Pb-exposed for 8 weeks. The results of relationship analysis between Pb levels in the tissues and lifetime cumulative Pb exposure (LCPE) showed that Pb levels in the blood, bone, and hair could indirectly reflect the Pb accumulation in the murine brain. These measures might serve as valuable biomarkers for chronic Pb exposure reflective of the accumulation of Pb in the central nervous system (CNS). Sub-chronic Pb exposure for 8 weeks altered Ca, Cu, Fe, and Zn levels, but no effects were noted on Mg levels in any of the analyzed tissues. Pb decreased Ca in teeth, Cu in thighbone and teeth, Zn in whole blood and hair, and Fe in hair. In contrast, Pb increased Ca levels in corpus striatum and hypothalamus, Cu levels in striatum, Zn levels in teeth, and Fe levels in hippocampus, thighbone, and teeth. The Pb-induced changes in metal ratios in various tissues may serve as valuable biomarkers for chronic Pb exposure as they are closely related to the accumulations of Pb in the murine CNS. The results suggest that altered distribution of several essential metal elements may be involved in Pb-induced neurotoxicity. Additional studies should address the interaction between Pb and essential metal elements in the CNS and other organs.
Collapse
Affiliation(s)
- Shaojun Li
- Teaching and Research Section of Hygienic Toxicology, School of Public Health, Guangxi Medical University, No. 22 Shuangyong Rd, Nanning, Guangxi, 530021, People's Republic of China.
- Guangxi Colleges and Universities Key Laboratory of Prevention and Control of Highly Prevalent Diseases, Guangxi Medical University, Nanning, China.
| | - Chun Yang
- Teaching and Research Section of Hygienic Toxicology, School of Public Health, Guangxi Medical University, No. 22 Shuangyong Rd, Nanning, Guangxi, 530021, People's Republic of China
- Guangxi Colleges and Universities Key Laboratory of Prevention and Control of Highly Prevalent Diseases, Guangxi Medical University, Nanning, China
| | - Xiang Yi
- Teaching and Research Section of Hygienic Toxicology, School of Public Health, Guangxi Medical University, No. 22 Shuangyong Rd, Nanning, Guangxi, 530021, People's Republic of China
- Guangxi Colleges and Universities Key Laboratory of Prevention and Control of Highly Prevalent Diseases, Guangxi Medical University, Nanning, China
| | - Ruokun Wei
- Teaching and Research Section of Hygienic Toxicology, School of Public Health, Guangxi Medical University, No. 22 Shuangyong Rd, Nanning, Guangxi, 530021, People's Republic of China
- Guangxi Colleges and Universities Key Laboratory of Prevention and Control of Highly Prevalent Diseases, Guangxi Medical University, Nanning, China
| | - Michael Aschner
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY, 10461, USA
| | - Yueming Jiang
- Teaching and Research Section of Hygienic Toxicology, School of Public Health, Guangxi Medical University, No. 22 Shuangyong Rd, Nanning, Guangxi, 530021, People's Republic of China
- Guangxi Colleges and Universities Key Laboratory of Prevention and Control of Highly Prevalent Diseases, Guangxi Medical University, Nanning, China
| | - Shiyan Ou
- Teaching and Research Section of Hygienic Toxicology, School of Public Health, Guangxi Medical University, No. 22 Shuangyong Rd, Nanning, Guangxi, 530021, People's Republic of China
- Guangxi Colleges and Universities Key Laboratory of Prevention and Control of Highly Prevalent Diseases, Guangxi Medical University, Nanning, China
| | - Chaocong Yao
- Cardiothoracic Vascular Surgery, Hezhou People's Hospital, No. 150 Xiyue Rd, Hezhou, Guangxi, People's Republic of China
| |
Collapse
|
5
|
Tung PW, Kennedy EM, Burt A, Hermetz K, Karagas M, Marsit CJ. Prenatal lead (Pb) exposure is associated with differential placental DNA methylation and hydroxymethylation in a human population. Epigenetics 2022; 17:2404-2420. [PMID: 36148884 PMCID: PMC9665158 DOI: 10.1080/15592294.2022.2126087] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 09/02/2022] [Accepted: 09/12/2022] [Indexed: 11/03/2022] Open
Abstract
Prenatal lead (Pb) exposure is associated with adverse developmental outcomes and to epigenetic alterations such as DNA methylation and hydroxymethylation in animal models and in newborn blood. Given the importance of the placenta in foetal development, we sought to examine how prenatal Pb exposure was associated with differential placental DNA methylation and hydroxymethylation and to identify affected biological pathways linked to developmental outcomes. Maternal (n = 167) and infant (n = 172) toenail and placenta (n = 115) samples for prenatal Pb exposure were obtained from participants in a US birth cohort, and methylation and hydroxymethylation data were quantified using the Illumina Infinium MethylationEPIC BeadChip. An epigenome-wide association study was applied to identify differential methylation and hydroxymethylation associated with Pb exposure. Biological functions of the Pb-associated genes were determined by overrepresentation analysis through ConsensusPathDB. Prenatal Pb quantified from maternal toenail, infant toenail, and placenta was associated with 480, 27, and 2 differentially methylated sites (q < 0.05), respectively, with both increases and decreases associated with exposure. Alternatively, we identified 2, 1, and 14 differentially hydroxymethylated site(s) associated with maternal toenail, infant toenail, and placental Pb, respectively, with most showing increases in hydroxymethylation with exposure. Significantly overrepresented pathways amongst genes associated with differential methylation and hydroxymethylation (q < 0.10) included mechanisms pertaining to nervous system and organ development, calcium transport and regulation, and signalling activities. Our results suggest that both methylation and hydroxymethylation in the placenta can be variable based on Pb exposure and that the pathways impacted could affect placental function.
Collapse
Affiliation(s)
- Pei Wen Tung
- Gangarosa Department of Environmental Health, Emory University, Atlanta, GA, USA
| | - Elizabeth M. Kennedy
- Gangarosa Department of Environmental Health, Emory University, Atlanta, GA, USA
| | - Amber Burt
- Gangarosa Department of Environmental Health, Emory University, Atlanta, GA, USA
| | - Karen Hermetz
- Gangarosa Department of Environmental Health, Emory University, Atlanta, GA, USA
| | - Margaret Karagas
- Department of Epidemiology, Geisel School of Medicine at Dartmouth, Hanover, Lebanon
| | - Carmen J. Marsit
- Gangarosa Department of Environmental Health, Emory University, Atlanta, GA, USA
| |
Collapse
|
6
|
Rawat PS, Singh S, Mahdi AA, Mehrotra S. Environmental lead exposure and its correlation with intelligence quotient level in children. J Trace Elem Med Biol 2022; 72:126981. [PMID: 35452890 DOI: 10.1016/j.jtemb.2022.126981] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2021] [Revised: 02/18/2022] [Accepted: 04/07/2022] [Indexed: 11/26/2022]
Abstract
BACKGROUND Lead (Pb) is ubiquitous, naturally occurring heavy metal that has a neurotoxic effect on the CNS and causes a range of health problems in humans, including cognitive impairment. Its toxicity remains a worldwide health issue, especially in developing countries. In this study, we tend to investigate the relationship between Pb poisoning and sociodemographic status, intellectual and neurobehavioral capabilities of children. METHODS The background characteristics of the research subjects were collected via questionnaire. The study involved 43 children, aged from 4 to 12 years. Blood lead (BL) levels were analysed by using anodic stripping voltammeter (ASV). Intelligence quotient (IQ) was another parameter that was assessed via using the Goodenough draw-A-person test in Pb exposed as well as control children. Although sociodemographic information was obtained in a questionnaire pattern from the parents. RESULTS The mean of BL level was 19.93 ± 9.22 μg/dL. BL levels were considerably higher with low social status (p < 0.05), maternal employment (p < 0.001) and the maximum time spent outdoors (p < 0.001). Source of water, age of subjects, type of house and kohl used by children was observed to be significantly correlated with BL levels i.e. (p < 0.05). IQ levels were decreased in a concentration dependent manner (p < 0.01). Negative correlations were found between BL levels and IQ levels (r = -0.963, <0.01). Girls were found to be higher IQ level than boys (p < 0.05). Moreover, higher socioeconomic status had a higher IQ level (p < 0.01) as compared to low. CONCLUSION BL levels were significantly associated with IQ levels. Sociodemographic characteristic was also found to be one of the risk factors that influenced the BL levels of children. Our investigations have demonstrated that the exposure of Pb severely affected the learning with memory, and the intelligence quotient of children, that is found inversely proportional in respect to BL levels.
Collapse
Affiliation(s)
- Pushkar Singh Rawat
- Department of Biochemistry, University of Lucknow, Lucknow 226007, Uttar Pradesh, India.
| | - Shalini Singh
- Department of Biochemistry, University of Lucknow, Lucknow 226007, Uttar Pradesh, India
| | - Abbas Ali Mahdi
- Department of Biochemistry, King George Medical University, Lucknow 226003, Uttar Pradesh, India
| | - Sudhir Mehrotra
- Department of Biochemistry, University of Lucknow, Lucknow 226007, Uttar Pradesh, India.
| |
Collapse
|
7
|
Jiang CB, Kao CS, Chien LC, Chen YJ, Liao KW. Associations among prenatal and postnatal arsenic, lead, and cadmium exposures and motor development in 3-year-old children: a longitudinal birth cohort study in Taiwan. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:43191-43200. [PMID: 35091938 DOI: 10.1007/s11356-021-18321-5] [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: 09/14/2021] [Accepted: 12/21/2021] [Indexed: 06/14/2023]
Abstract
Prenatal and postnatal exposures to heavy metals have been suggested to interfere with neurodevelopment, but the neurotoxicity of lead (Pb), arsenic (As), and cadmium (Cd) is still unclear. In this study, we aimed to assess the associations between the levels of As, Cd, and Pb and children's neurodevelopment. A total of 299 mother-infant pairs were recruited in this study and their meconium were collected. After three years, 53 children underwent the Bayley Scales of Infant and Toddler Development (Bayley-III) examinations and provided hair and fingernail specimens. The levels of As, Cd, and Pb in the meconium, hair, and fingernail were measured by inductively coupled plasma mass spectrometry; the median levels were the following: meconium, 42.7, 5.57, and 25.6 ng/g, respectively; hair, 0.19, 0.05, and 3.61 μg/g, respectively; and fingernail, 0.29, 0.04, and 0.84 μg/g, respectively. After adjusting for potential confounding factors, we found that the log-transformed levels of As in the hair samples was negatively associated with gross motor development (β = - 0.032; 95% confidence interval: - 0.061 to - 0.004). We conclude that postnatal exposure to As is a crucial period for gross motor development in children, while the effects of Cd and Pb on neurodevelopment are less clear.
Collapse
Affiliation(s)
- Chuen-Bin Jiang
- Department of Pediatric Gastroenterology, Hepatology and Nutrition, MacKay Children's Hospital, Taipei, Taiwan
- Department of Medicine, MacKay Medical College, New Taipei City, Taiwan
| | - Chi-Sian Kao
- School of Public Health, Taipei Medical University, Taipei, Taiwan
| | - Ling-Chu Chien
- School of Public Health, Taipei Medical University, Taipei, Taiwan
- Neuroscience Research Center, Taipei Medical University, Taipei, Taiwan
- Nutrition Research Center, Taipei Medical University Hospital, Taipei, Taiwan
| | - Yi-Jhen Chen
- School of Public Health, Taipei Medical University, Taipei, Taiwan
| | - Kai-Wei Liao
- School of Food Safety, College of Nutrition, Taipei Medical University, 250 Wu-Xing Street, Taipei, Taiwan.
| |
Collapse
|
8
|
Chebli A, Mimoun S, Brahimi B, Zebbiche Y, Seleymi S, Cheradi S, Hamzaoui F. Évaluation de l’exposition au plomb et au monoxyde de carbone des travailleurs de parking de la région d’Alger. ARCH MAL PROF ENVIRO 2022. [DOI: 10.1016/j.admp.2022.05.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
9
|
Galiciolli MEA, Lima LS, da Costa NDS, de Andrade DP, Irioda AC, Oliveira CS. IQ alteration induced by lead in developed and underdeveloped/developing countries: A systematic review and a meta-analysis. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 292:118316. [PMID: 34648837 DOI: 10.1016/j.envpol.2021.118316] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 09/17/2021] [Accepted: 10/06/2021] [Indexed: 06/13/2023]
Abstract
The aim of this study was to evaluate the effects of Pb exposure on full-scale IQ score in pediatric subjects. Following PRISMA guidelines, the data from January 2010 to April 2020 were systematically searched and collected on electronic databases (PubMed, Scopus, and Embase). The eligibility criteria included cross-sectional, cohort, and case-control studies that were published in English, from 2010 to 2020, that analyzed the blood Pb levels of pediatric subjects (0-19 years) and possible changes in the full-scale IQ score. In this study, 2174 scientific papers were collected from three electronic databases. From those, 726 were duplicates and 1421 were excluded because they did not meet the eligibility criteria, resulting in a total of 27 papers, from which, seven were used to perform the meta-analysis. The 27 scientific papers systematically selected for this study were separated by the country where the study was realized in developed and underdeveloped/developing countries. In the underdeveloped/developing countries the blood Pb levels are higher and showed a greater variation (1.30-11.66 μgPb/dL of blood) than in countries with higher development index (0.57-4.80 μgPb/dL of blood). The full-scale IQ score are inversely proportional to the blood Pb values, and it is possible to see that in the underdeveloped/developing countries the full-scale IQ score showed lower values and greater variation (59.2-111) compared to the individuals from developed countries (91.9-114.5). In conclusion, it was observed that blood Pb levels alter the full-scale IQ score. Thus, policies for the prevention of environmental contamination and the reduction of Pb exposure must be taken, mainly, in underdeveloped/developing countries.
Collapse
Affiliation(s)
- Maria Eduarda A Galiciolli
- Instituto de Pesquisa Pelé Pequeno Príncipe, Curitiba, PR, Brazil; Faculdades Pequeno Príncipe, Curitiba, PR, Brazil
| | - Luíza Siqueira Lima
- Instituto de Pesquisa Pelé Pequeno Príncipe, Curitiba, PR, Brazil; Faculdades Pequeno Príncipe, Curitiba, PR, Brazil
| | - Nayara de Souza da Costa
- Instituto de Pesquisa Pelé Pequeno Príncipe, Curitiba, PR, Brazil; Faculdades Pequeno Príncipe, Curitiba, PR, Brazil
| | - Diancarlos P de Andrade
- Instituto de Pesquisa Pelé Pequeno Príncipe, Curitiba, PR, Brazil; Faculdades Pequeno Príncipe, Curitiba, PR, Brazil
| | - Ana C Irioda
- Instituto de Pesquisa Pelé Pequeno Príncipe, Curitiba, PR, Brazil; Faculdades Pequeno Príncipe, Curitiba, PR, Brazil
| | - Cláudia S Oliveira
- Instituto de Pesquisa Pelé Pequeno Príncipe, Curitiba, PR, Brazil; Faculdades Pequeno Príncipe, Curitiba, PR, Brazil.
| |
Collapse
|
10
|
Heidari S, Mostafaei S, Razazian N, Rajati M, Saeedi A, Rajati F. Correlation between lead exposure and cognitive function in 12-year-old children: a systematic review and meta-analysis. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:43064-43073. [PMID: 34129165 DOI: 10.1007/s11356-021-14712-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Accepted: 05/31/2021] [Indexed: 06/12/2023]
Abstract
Lead exposure as a toxic material especially in children can be recognized as a harmful factor for cognitive function system. This meta-analysis was conducted to estimate the lead exposure effect on cognitive function among 6979 children less than 12 years. The 16 studies were divided into two clusters according to "duration of exposure" and "dose" using k-means partitioning clustering algorithm. Then, subgroup analysis has been performed based on the clustered studies. According to the results of the k-means clustering, dose and duration of exposure were significant factors between all considered variables. A stronger negative significant pooled correlation was observed in higher dose and duration cluster in comparison with another cluster including lower dose and duration (r = - 0.29, P-value < 0.001 vs. r = - 0.08, P-value < 0.001). Overall, a negative significant correlation was observed between lead exposure and cognitive function test score (r = - 0.22, P-value < 0.001). This study confirms the negative effect of lead on cognitive function in children, but needed further investigations to achieve the safe dose and duration of the lead exposure.
Collapse
Affiliation(s)
- Serve Heidari
- Department of Biostatistics, Faculty of Paramedical Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Shayan Mostafaei
- Department of Biostatistics, Faculty of Health, Kermanshah University of Medical Sciences, Kermanshah, Iran
- Epidemiology of Biostatistics Unit, Rheumatology Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Nazanin Razazian
- Department of Neurology, School of Medicine Imam Reza Hospital, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Mojgan Rajati
- Obstetrics and Gynecology, Department of Obstetrics and Gynecology, School of Medicine, Motazedi Hospital Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Anahita Saeedi
- Department of Biostatistics, School of Public Health & Health Sciences, University of Massachusetts, Amherst, MA, USA
| | - Fatemeh Rajati
- Research Center for Environmental Determinants of Health, Health Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran.
| |
Collapse
|
11
|
Van Horne YO, Farzan SF, Johnston JE. Metal-mixtures in toenails of children living near an active industrial facility in Los Angeles County, California. JOURNAL OF EXPOSURE SCIENCE & ENVIRONMENTAL EPIDEMIOLOGY 2021; 31:427-441. [PMID: 33935287 PMCID: PMC8893014 DOI: 10.1038/s41370-021-00330-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 04/01/2021] [Accepted: 04/08/2021] [Indexed: 05/15/2023]
Abstract
BACKGROUND Children residing in communities near metalworking industries are vulnerable to multiple toxic metal exposures. Understanding biomarkers of exposure to multiple toxic metals is important to characterize cumulative burden and to distinguish potential exposure sources in such environmental justice neighborhoods impacted by industrial operations. Exposure to metal mixtures has not been well-characterized among children residing in the United States, and is understudied in communities of color. METHODS In this study we used toenail clippings, a noninvasive biomarker, to assess exposure to arsenic (As), cadmium (Cd), mercury (Hg), manganese (Mn), lead (Pb), antimony (Sb), selenium (Se), and vanadium (V). We used nonnegative matrix factorization (NMF) to identify "source" signatures and patterns of exposure among predominantly working class Latinx children residing near an industrial corridor in Southeast Los Angeles County. Additionally, we investigated the association between participant demographic, spatial, and dietary characteristics with identified metal signatures. RESULTS Through NMF, we identified three groupings (source factors) for the metal concentrations in children's toenails. A grouping composed of Sb, Pb, As, and Cd, was identified as a potential industrial source factor, reflective of known airborne elemental emissions in the industrial corridor. We further identified a manganese source factor primarily composed of Mn, and a potential dietary source factor driven by Se and Hg. We observed differences in the industrial source factor by age of participants, while the dietary source factor varied by neighborhood. CONCLUSION Utilizing an unsupervised dimension reduction technique (NMF), we identified a "source signature" of contamination in toenail samples from children living near metalworking industry. Investigating patterns and sources of exposures in cumulatively burdened communities is necessary to identify appropriate public health interventions.
Collapse
Affiliation(s)
- Yoshira Ornelas Van Horne
- Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Shohreh F Farzan
- Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Jill E Johnston
- Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA.
| |
Collapse
|
12
|
Hartley K, Perazzo J, Brokamp C, Gillespie GL, Cecil KM, LeMasters G, Yolton K, Ryan P. Residential surrounding greenness and self-reported symptoms of anxiety and depression in adolescents. ENVIRONMENTAL RESEARCH 2021; 194:110628. [PMID: 33345894 PMCID: PMC9933414 DOI: 10.1016/j.envres.2020.110628] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 12/08/2020] [Accepted: 12/14/2020] [Indexed: 05/10/2023]
Abstract
BACKGROUND Evidence on the relationship between exposure to greenness and adolescent mental health is limited. The purpose of this study was to examine the association between greenness throughout childhood and mental health at age 12 years. METHODS We assessed greenness using the satellite-based measure of Normalized Difference Vegetation Index (NDVI) within 200m, 400m, and 800m of home address at birth, age 12 years, and across childhood (averaged for each year from birth to age 12) among the Cincinnati Childhood Allergy and Air Pollution Study (CCAAPS) cohort. Self-reported symptoms of anxiety and depression were assessed at age 12 years using the Spence Children's Anxiety Scale (SCAS) and Children's Depression Inventory 2 (CDI 2), respectively. Associations were estimated using linear regression, adjusting for covariates including traffic-related air pollution, neurological hazard exposure, blood lead level, household income, and community deprivation. RESULTS In adjusted models, NDVI was largely not associated with self-reported anxiety and depression symptoms, except for the SCAS separation anxiety subscale at 400m and 800m (0.1 unit increase mean NDVI 400m: β = -0.97, 95% CI: -1.86, -0.07; 800m: β = -1.33, 95% CI: -2.32, -0.34). CONCLUSION While we found no direct relationship between greenness and overall symptoms of anxiety and depression in adolescents upon adjustment for relevant covariates at the 200m distance, greenness may lesson symptoms of separation anxiety within 400m and 800m distance from the home address at age 12 years. Future research should examine mechanisms for these relationships at the community- and individual-level.
Collapse
Affiliation(s)
- Kim Hartley
- University of Cincinnati, College of Nursing, Cincinnati, OH, USA; Cincinnati Children's Hospital Medical Center, Division of General and Community Pediatrics, Cincinnati, OH, USA.
| | - Joseph Perazzo
- University of Cincinnati, College of Nursing, Cincinnati, OH, USA.
| | - Cole Brokamp
- University of Cincinnati, College of Medicine, Department of Pediatrics, Cincinnati, OH, USA; Cincinnati Children's Hospital Medical Center, Division of Biostatistics and Epidemiology, Cincinnati, OH, USA.
| | | | - Kim M Cecil
- University of Cincinnati, College of Medicine, Department of Pediatrics, Cincinnati, OH, USA; Cincinnati Children's Hospital Medical Center, Department of Radiology, Cincinnati, OH, USA.
| | - Grace LeMasters
- University of Cincinnati, College of Medicine, Department of Environmental and Public Health Sciences, Cincinnati, OH, USA.
| | - Kimberly Yolton
- Cincinnati Children's Hospital Medical Center, Division of General and Community Pediatrics, Cincinnati, OH, USA; University of Cincinnati, College of Medicine, Department of Pediatrics, Cincinnati, OH, USA.
| | - Patrick Ryan
- University of Cincinnati, College of Medicine, Department of Pediatrics, Cincinnati, OH, USA; Cincinnati Children's Hospital Medical Center, Division of Biostatistics and Epidemiology, Cincinnati, OH, USA; University of Cincinnati, College of Medicine, Department of Environmental and Public Health Sciences, Cincinnati, OH, USA.
| |
Collapse
|