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Ibarluzea J, Subiza-Pérez M, Arregi A, Molinuevo A, Arranz-Freijo E, Sánchez-de Miguel M, Jiménez A, Andiarena A, Santa-Marina L, Lertxundi A. Association of maternal prenatal urinary fluoride levels with ADHD symptoms in childhood. ENVIRONMENTAL RESEARCH 2023; 235:116705. [PMID: 37479215 DOI: 10.1016/j.envres.2023.116705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 06/17/2023] [Accepted: 07/18/2023] [Indexed: 07/23/2023]
Abstract
BACKGROUND Health concerns about the potential impact of exposure to fluoride via drinking water (DW) on neuropsychological development include behavioral outcomes such as ADHD. OBJECTIVE We aimed to examine the association between prenatal maternal urinary fluoride and symptoms associated with attention-deficit/hyperactivity disorder (ADHD) at the age of 8 and 11 years. METHOD Data from 255 to 236 mother-child pairs from the "Infancia y Medio Ambiente" (INMA) birth cohort (Gipuzkoa; Spain) with maternal urinary F adjusted for creatinine (MUFcr) during pregnancy (first and third trimester) and child assessments of ADHD-like symptoms reported by Conners' Rating Scales-Revised at age of 8 and 11 years was available. Clinical approach was also used: cut off criteria (T > 66). Multiple linear regression models were fitted when outcomes were analyzed as continuous, and logistic regression models when the outcomes were analyzed with a categorical clinical approach. Covariates related to maternal characteristics, birth outcomes, childhood, quality of family context and biomarkers of neuro-toxicants were used. RESULTS No association was found between MUFcr levels during pregnancy and cognitive problems-inattention, hyperactivity or ADHD index score of symptoms at 8 or 11 years. When results were analyzed from the perspective of a clinical approach, at the age of 11 years, there were significant inverse association between MUFcr and being categorized as a cognitive problems-inattention case. ORs were also indicative of a lower risk, although not significant, for ADHD index at age 11. Sensitivity analyses, taking into consideration quality of family context or the levels of other toxicants during pregnancy showed similar results. CONCLUSIONS Higher levels of MUFcr in pregnant women were associated with a lower risk of cognitive problems-inattention at 11 years. These findings are inconsistent with those from previous studies and indicate the need for other population-based studies to confirm or overturn these results.
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Affiliation(s)
- Jesús Ibarluzea
- Ministry of Health of the Basque Government, Sub-Directorate for Public Health and Addictions of Gipuzkoa, 20013, San Sebastián, Spain; Faculty of Psychology of the University of the Basque Country (UPV-EHU), 20018, San Sebastian, Spain; Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), 28029, Madrid, Spain; Biodonostia Health Research Institute, Environmental Epidemiology and Child Development Group, 20014, San Sebastian, Spain
| | - Mikel Subiza-Pérez
- Faculty of Psychology of the University of the Basque Country (UPV-EHU), 20018, San Sebastian, Spain; Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), 28029, Madrid, Spain; Biodonostia Health Research Institute, Environmental Epidemiology and Child Development Group, 20014, San Sebastian, Spain; Bradford Institute for Health Research, Temple Bank House, Bradford Royal Infirmary, BD9 6RJ, Bradford, United Kingdom
| | - Ane Arregi
- Faculty of Psychology of the University of the Basque Country (UPV-EHU), 20018, San Sebastian, Spain; Biodonostia Health Research Institute, Environmental Epidemiology and Child Development Group, 20014, San Sebastian, Spain.
| | - Amaia Molinuevo
- Biodonostia Health Research Institute, Environmental Epidemiology and Child Development Group, 20014, San Sebastian, Spain
| | - Enrique Arranz-Freijo
- Faculty of Psychology of the University of the Basque Country (UPV-EHU), 20018, San Sebastian, Spain; Biodonostia Health Research Institute, Environmental Epidemiology and Child Development Group, 20014, San Sebastian, Spain
| | - Manuel Sánchez-de Miguel
- Faculty of Psychology of the University of the Basque Country (UPV-EHU), 20018, San Sebastian, Spain; Biodonostia Health Research Institute, Environmental Epidemiology and Child Development Group, 20014, San Sebastian, Spain
| | - Ana Jiménez
- Ministry of Health of the Basque Government, Sub-Directorate for Public Health and Addictions of Gipuzkoa, 20013, San Sebastián, Spain; Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), 28029, Madrid, Spain; Biodonostia Health Research Institute, Environmental Epidemiology and Child Development Group, 20014, San Sebastian, Spain
| | - Ainara Andiarena
- Faculty of Psychology of the University of the Basque Country (UPV-EHU), 20018, San Sebastian, Spain; Biodonostia Health Research Institute, Environmental Epidemiology and Child Development Group, 20014, San Sebastian, Spain
| | - Loreto Santa-Marina
- Ministry of Health of the Basque Government, Sub-Directorate for Public Health and Addictions of Gipuzkoa, 20013, San Sebastián, Spain; Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), 28029, Madrid, Spain; Biodonostia Health Research Institute, Environmental Epidemiology and Child Development Group, 20014, San Sebastian, Spain
| | - Aitana Lertxundi
- Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), 28029, Madrid, Spain; Biodonostia Health Research Institute, Environmental Epidemiology and Child Development Group, 20014, San Sebastian, Spain; Faculty of Medicine and Nursery of the University of the Basque Country (UPV/EHU), 48940, Leioa, Spain
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Lu AX, Wang SS, Xu X, Wu MQ, Liu JX, Xu M, Cao LL, Wang J, Wu W, Li H, Yan CH. Sex-specific associations between cord blood lead and neurodevelopment in early life: The mother-child cohort (Shanghai, China). ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 249:114337. [PMID: 36508835 DOI: 10.1016/j.ecoenv.2022.114337] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2022] [Revised: 11/22/2022] [Accepted: 11/23/2022] [Indexed: 06/17/2023]
Abstract
The extent to which neurodevelopment is affected by prenatal lead exposure has not been conclusive. In addition, studies on the effects of sex on these relationships are inconsistent. The aim of this study was to investigate the impact of cord blood lead on neurodevelopment in children within sex subgroups. A total of 275 mother-child pairs from the Shanghai mother-child cohort were included. Umbilical cord blood lead was measured using graphite furnace atomic absorption spectrophotometry. The Bayley Scales for Infant Development-III (BSID-III) was used to measure the neurodevelopment of infants at the age of 18 ± 1.5 months. The median and interquartile range of cord blood lead levels in the total participants, male, and female children were 44.0 (24.5) μg/L, 44.0 (24.3) μg/L, and 46.0 (24.0) μg/L, respectively. According to multiple linear regression, cord blood lead concentrations showed a negative association with fine motor scores in all models associated with female children (β = -1.5; 95%confidence interval: -2.6, -0.4). However, prenatal lead levels were not associated with any of the BSID-III scores in male children. In addition, cord serum DHA was found positively related to fine motor scores in male children. Our findings suggest that prenatal lead exposure could lead to decreased motor function, although this phenomenon was only observed in female children. And DHA may be a protective factor against lead exposure in boys. Thus, further studies are needed to investigate the associations between prenatal lead exposure and neurobehavioral development, as well as the mechanism of sex differences.
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Affiliation(s)
- An-Xin Lu
- Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Su-Su Wang
- Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China; School of Public Health, Shanghai Jiao Tong University, Shanghai, China
| | - Xi Xu
- Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Mei-Qin Wu
- Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jun-Xia Liu
- Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Min Xu
- Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Lu-Lu Cao
- Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Ju Wang
- School of Nursing and Rehabilitation, Shandong University, Jinan, Shandong, China
| | - Wei Wu
- Qilu Children's Hospital of Shandong University, Jinan, Shandong, China
| | - Hui Li
- Jining No.1 People's Hospital, Jining, Shandong, China
| | - Chong-Huai Yan
- Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China.
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García-Villarino M, Signes-Pastor AJ, Karagas MR, Riaño-Galán I, Rodríguez-Dehli C, Grimalt JO, Junqué E, Fernández-Somoano A, Tardón A. Exposure to metal mixture and growth indicators at 4-5 years. A study in the INMA-Asturias cohort. ENVIRONMENTAL RESEARCH 2022; 204:112375. [PMID: 34785205 PMCID: PMC8671344 DOI: 10.1016/j.envres.2021.112375] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 11/08/2021] [Accepted: 11/09/2021] [Indexed: 05/02/2023]
Abstract
BACKGROUND Exposure to toxic and non-toxic metals impacts childhood growth and development, but limited data exists on exposure to metal mixtures. Here, we investigated the effects of exposure to individual metals and a mixture of barium, cadmium, cobalt, lead, molybdenum, zinc, and arsenic on growth indicators in children 4-5 years of age. METHODS We used urine metal concentrations as biomarkers of exposure in 328 children enrolled in the Spanish INMA-Asturias cohort. Anthropometric measurements (arm, head, and waist circumferences, standing height, and body mass index) and parental sociodemographic variables were collected through face-to-face interviews by trained study staff. Linear regressions were used to estimate the independent effects and were adjusted for each metal in the mixture. We applied Bayesian kernel machine regression to examine non-linear associations and potential interactions. RESULTS In linear regression, urinary levels of cadmium were associated with reduced arm circumference (βadjusted = -0.44, 95% confidence interval [CI]: -0.73, -0.15), waist circumference (βadjusted = -1.29, 95% CI: -2.10, -0.48), and standing height (βadjusted = -1.09, 95% CI: -1.82, -0.35). Lead and cobalt concentrations were associated with reduced standing height (βadjusted = -0.64, 95% CI: -1.20, -0.07) and smaller head circumference (βadjusted = -0.29, 95% CI: -0.49, -0.09), respectively. However, molybdenum was positively associated with head circumference (βadjusted = 0.22, 95% CI: 0.01, 0.43). BKMR analyses showed strong linear negative associations of cadmium with arm and head circumference and standing height. BKMR analyses also found lead and cobalt in the metal mixture were related to reduce standing height and head circumference, and consistently found molybdenum was related to increased head circumference. CONCLUSION Our findings suggest that exposure to metal mixtures impacts growth indicators in children.
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Affiliation(s)
- Miguel García-Villarino
- Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Monforte de Lemos Avenue 3-5, 28029, Madrid, Spain; Unidad de Epidemiología Molecular Del Cáncer, Instituto Universitario de Oncología Del Principado de Asturias (IUOPA) - Departamento de Medicina, Universidad de Oviedo, Julián Clavería Street S/n, 33006, Oviedo, Asturias, Spain; Instituto de Investigación Sanitaria Del Principado de Asturias (ISPA), Roma Avenue S/n, 33001, Oviedo, Spain
| | - Antonio J Signes-Pastor
- Department of Epidemiology, Geisel School of Medicine, Dartmouth College, 1 Medical Center Dr., Lebanon, NH, 03756, USA; Department of Public Health. Universidad Miguel Hernández, Avenida de Alicante KM 87, 03550, Sant Joan D'Alacant, Spain
| | - Margaret R Karagas
- Department of Epidemiology, Geisel School of Medicine, Dartmouth College, 1 Medical Center Dr., Lebanon, NH, 03756, USA
| | - Isolina Riaño-Galán
- Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Monforte de Lemos Avenue 3-5, 28029, Madrid, Spain; Servicio de Pediatría, Endocrinología Pediátrica, HUCA, Roma Avenue S/n, 33001, Oviedo, Asturias, Spain
| | | | - Joan O Grimalt
- Department of Environmental Chemistry, Institute of Environmental Assessment and Water Research (IDAEA-CSIC), Jordi Girona Street 18-26, 08034, Barcelona, Cataluña, Spain
| | - Eva Junqué
- Department of Environmental Chemistry, Institute of Environmental Assessment and Water Research (IDAEA-CSIC), Jordi Girona Street 18-26, 08034, Barcelona, Cataluña, Spain
| | - Ana Fernández-Somoano
- Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Monforte de Lemos Avenue 3-5, 28029, Madrid, Spain; Unidad de Epidemiología Molecular Del Cáncer, Instituto Universitario de Oncología Del Principado de Asturias (IUOPA) - Departamento de Medicina, Universidad de Oviedo, Julián Clavería Street S/n, 33006, Oviedo, Asturias, Spain; Instituto de Investigación Sanitaria Del Principado de Asturias (ISPA), Roma Avenue S/n, 33001, Oviedo, Spain.
| | - Adonina Tardón
- Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Monforte de Lemos Avenue 3-5, 28029, Madrid, Spain; Unidad de Epidemiología Molecular Del Cáncer, Instituto Universitario de Oncología Del Principado de Asturias (IUOPA) - Departamento de Medicina, Universidad de Oviedo, Julián Clavería Street S/n, 33006, Oviedo, Asturias, Spain; Instituto de Investigación Sanitaria Del Principado de Asturias (ISPA), Roma Avenue S/n, 33001, Oviedo, Spain
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Li XN, Jia LH, Cao X, Zhang SS, Pu R, Cheng XJ, Liu Y. Association of prenatal factors and cord blood lead levels in China: A nested cohort cross-sectional study. J Trace Elem Med Biol 2021; 67:126783. [PMID: 34015660 DOI: 10.1016/j.jtemb.2021.126783] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 04/13/2021] [Accepted: 05/10/2021] [Indexed: 11/16/2022]
Abstract
BACKGROUND Lead exposure all over the world has gradually declined. As fetuses are more prone to lead exposure, even to low levels of lead exposure, it is important to monitor blood lead levels (BLLs) in pregnancy. METHODS We obtained data on BLLs in the third trimester of pregnancy from medical records and measured cord BLLs obtained from 121 mother-child pairs in Shenyang, China from September 2019 to February 2020. We also estimated relationships between socio-demographic, lifestyle and dietary factors during pregnancy as well as cord BLLs to identify the source of lead exposure during pregnancy. BLLs was estimated by atomic absorption spectrometry through graphite furnace ionization techniques. The data which obtained by questionnaires during pregnancy included maternal sociodemographic, lifestyle, dietary factors. We have established three multivariate logistic regression models in which the dichotomous BLLs was used as the dependent variable (cord BLLs ≥20 μg/L vs <20 μg/L). RESULTS The median and geometric mean of cord BLLs were 22.90 μg/L, 21.88 μg/L and BLLs in the third trimester of pregnancy were 25.29 μg/L, 24.66 μg/L, respectively. BLLs showed significant correlations between cord and the third trimester of pregnancy (r = 0.277, P = 0.012). Pregnant women who had not been exposed to passive smoking had lower OR (95 %) [0.43(0.19-0.94)] for cord BLLs ≥20 μg/L than pregnant women who had. Intake of docosahexaenoic acid (DHA) during third trimester of pregnancy presented an OR (95 %) [0.23(0.08-0.61)] for cord BLLs ≥20 μg/L. Consuming more whole grains (>3 times/week) and beverage (≥1 times/week) showed an OR (95%CI) for cord BLLs ≥20 μg/L of 0.09(0.02-0.53) and 0.19(0.06-0.69), respectively. CONCLUSION This study showed the cord BLLs of Chinese are still higher than most developed countries. Passive smoking is a risk factor for cord BLLs ≥20 μg/L and supplement of DHA, whole grains and beverage consumption during pregnancy may act as a beneficial factor against having cord BLLs ≥20 μg/L.
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Affiliation(s)
- Xue-Ning Li
- Department of Pediatrics, The Fourth Affiliated Hospital of China Medical University, 110000, Shenyang, Liaoning, People's Republic of China
| | - Li-Hong Jia
- Department of Child and Adolescent Health, School of Public Health, China Medical University, 110000, Shenyang, Liaoning, People's Republic of China
| | - Xia Cao
- Department of Obstetrics, The Fourth Affiliated Hospital of China Medical University, 110000, Shenyang, Liaoning, People's Republic of China
| | - Shuang-Shuang Zhang
- Department of Pediatrics, The Fourth Affiliated Hospital of China Medical University, 110000, Shenyang, Liaoning, People's Republic of China
| | - Rui Pu
- Department of Pediatrics, The Fourth Affiliated Hospital of China Medical University, 110000, Shenyang, Liaoning, People's Republic of China
| | - Xiao-Jun Cheng
- Department of Pediatrics, The Fourth Affiliated Hospital of China Medical University, 110000, Shenyang, Liaoning, People's Republic of China
| | - Ying Liu
- Department of Pediatrics, The Fourth Affiliated Hospital of China Medical University, 110000, Shenyang, Liaoning, People's Republic of China.
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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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Weng C, Li X, Lu Q, Yang W, Wang J, Yan X, Li B, Sakran M, Hong J, Zhu W, Zhou X. A label-free electrochemical biosensor based on magnetic biocomposites with DNAzyme and hybridization chain reaction dual signal amplification for the determination of Pb2+. Mikrochim Acta 2020; 187:575. [DOI: 10.1007/s00604-020-04548-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Accepted: 09/02/2020] [Indexed: 01/20/2023]
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Kazi TG, Afridi HI, Korejo FA, Akhtar A, Baig JA. Evaluate the exposure of toxic metals via drinking water and smoking nonbranded cigarette in malnourished women by modified single/two-step cloud point extraction. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:14543-14552. [PMID: 32048190 DOI: 10.1007/s11356-020-07897-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2019] [Accepted: 01/27/2020] [Indexed: 06/10/2023]
Abstract
Presently, the exposure of heavy metals (cadmium and lead) was determined in biological sample (serum) of women (pregnant and nonpregnant) who belong to low socioeconomic group (malnutrition). The cadmium (Cd) and lead (Pb) were determined in drinking water and locally produced cigarette (bidi), smoking by women of childbearing age. The preconcentration of heavy metals in serum, water, and tobacco of bidi were carried out by cloud point extraction at single and two-step methods before determination by atomic absorption spectrometry with flame mode. The Cd and Pb in the water- and acid-digested serum and tobacco samples were treated with a complexing reagent 1-(2-pyridylazo)-2-naphthol (PAN). The hydrophobic complex of Cd and Pb was entrapped in Triton X-114. For the first step, the entrapped analytes in Triton X-114 was diluted with alcoholic acid (0.2 mol/L of HNO3) and subjected to FAAS, whereas for the second step of CPE, the surfactant-rich analyte was subjected to the second round of enrichment method. Lastly, the analyte was back-extracted in acidic solution (0.2 mol/L) and analyzed by FAAS. The all significant variable was optimized for optimal recovery of Cd and Pb. The recommended single/two-step cloud point extraction method was validated by simultaneously evaluated matrices matched certified reference materials of water, serum, and tobacco. The resulted data indicated that the groundwater samples contained elevated concentrations of Cd and Pb than recommended values for drinking water by WHO, while the contents of Cd and Pb were observed about two-fold higher in nonbranded cigarette (bidi) than branded cigarette. It was observed that there were about 3 to 4 times higher concentrations of both toxic metals in blood serum of smoker malnourished women group than in referent nonsmoker women. Graphical abstract.
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Affiliation(s)
- Tasneem Gul Kazi
- National Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, 76080, Pakistan.
| | - Hassan Imran Afridi
- National Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, 76080, Pakistan
| | - Faiza Ali Korejo
- National Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, 76080, Pakistan
| | - Asma Akhtar
- National Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, 76080, Pakistan
| | - Jameel Ahmed Baig
- National Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, 76080, Pakistan
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McElroy KG, Iobst SE, DeVance-Wilson C, Ludeman E, Barr E. Systematic Review and Meta-Analysis of the Effect of Nutrients on Blood Lead Levels in Pregnancy. J Obstet Gynecol Neonatal Nurs 2020; 49:243-253. [PMID: 32259512 DOI: 10.1016/j.jogn.2020.02.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/01/2020] [Indexed: 11/18/2022] Open
Abstract
OBJECTIVE To synthesize experimental and nonexperimental research on the relationship between nutrients and blood lead levels in pregnant women. We also performed a meta-analysis on a subgroup of studies on calcium and blood lead levels. DATA SOURCES PubMed, Embase, and CINAHL databases were searched in July 2019. STUDY SELECTION We included articles published in English in any year that reported the results of experimental or observational studies on the effect of nutrients on blood lead levels in pregnancy. DATA EXTRACTION Three nurse reviewers extracted data and appraised the studies using tools from the Joanna Briggs Institute. DATA SYNTHESIS AND META-ANALYSIS We included 28 studies from 16 countries. Study authors examined 14 distinct nutrients, with calcium being the most frequent. The metaregression included nine analyses of the effect of calcium on blood lead levels and showed a small but significant inverse relationship. The quality of evidence for the effect of calcium on lead levels was high. Eleven analyses were related to the effect of iron on blood lead levels. The quality of evidence was high, and we found mostly negative associations between iron intake and blood lead levels. The quality of evidence for the remaining nutrients was moderate, with few significant findings. CONCLUSION Targeted nutritional interventions may be beneficial for pregnant women with current lead exposure or a history of elevated lead levels, particularly those with calcium- or iron-deficient diets. More rigorously designed studies are needed in this area.
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Bocca B, Ruggieri F, Pino A, Rovira J, Calamandrei G, Mirabella F, Martínez MÁ, Domingo JL, Alimonti A, Schuhmacher M. Human biomonitoring to evaluate exposure to toxic and essential trace elements during pregnancy. Part B: Predictors of exposure. ENVIRONMENTAL RESEARCH 2020; 182:109108. [PMID: 32069754 DOI: 10.1016/j.envres.2019.109108] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 12/23/2019] [Accepted: 12/31/2019] [Indexed: 06/10/2023]
Abstract
Maternal exposure to toxic and essential trace elements represents a surrogate of exposure to the unborn child. Variables of exposure as sociodemographic, lifestyles and diet may contribute to different exposure of pregnant women to specific trace elements. Blood, urine and cord blood samples of 53 pregnant women of the HEALS-EXHES cohort, recruited in Reus (Catalonia, Spain) between 2016 and 2017, were analysed for the concentrations of As, Cd, Co, Cr, Cu, Hg, Mn, Ni, Pb, Se and Zn. Univariate and multivariate models were built in order to assess associations between element concentrations in each matrix, and variables obtained by questionnaires on mothers' characteristics and dietary habits. Results showed several significant associations between various variables and essential trace and toxic elements. Age was associated with higher levels of Cd and Pb in cord blood samples. Multiparous women showed lower levels of Cd in maternal blood and Pb in both maternal and cord blood than nulliparous women. Hispanic mothers presented higher levels of blood As and lower levels of blood Se compared to mothers of different ethnicity. Higher education level was associated with higher As and Hg concentrations in both maternal and cord blood samples. Higher annual income diminished the level of Pb in maternal blood. Smoking in pregnancy incremented the levels of Cd in mothers' blood. Alcohol consumption may affect the absorption of Cu, Mn and Zn. Supplementations with multivitamins, folic acid and iron showed effects on elements as Cr, Mn, Se and Zn. Regarding food group intake, bluefish incremented Pb levels, while canned fish and seafood affected levels of some elements as As, Hg, Cu and Se. Other elements such as Mn and Pb were influenced by the intake of different kinds of foods. The present results showed that some modifiable lifestyles and food intakes could be the target of interventions to help pregnant women to maintain suitable concentrations of essential elements and lower levels of toxic ones, and to improve consequently neonatal health outcomes.
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Affiliation(s)
| | | | - Anna Pino
- Istituto Superiore di Sanità, Rome, Italy
| | - Joaquim Rovira
- Laboratory of Toxicology and Environmental Health, School of Medicine, IISPV, Universitat Rovira i Virgili, Sant Llorenç 21, 43201, Reus, Catalonia, Spain; Environmental Engineering Laboratory, Departament d'Enginyeria Quimica, Universitat Rovira i Virgili, Av. Països Catalans 26, 43007, Tarragona, Catalonia, Spain
| | | | | | - María Ángeles Martínez
- Environmental Engineering Laboratory, Departament d'Enginyeria Quimica, Universitat Rovira i Virgili, Av. Països Catalans 26, 43007, Tarragona, Catalonia, Spain
| | - José L Domingo
- Laboratory of Toxicology and Environmental Health, School of Medicine, IISPV, Universitat Rovira i Virgili, Sant Llorenç 21, 43201, Reus, Catalonia, Spain
| | | | - Marta Schuhmacher
- Environmental Engineering Laboratory, Departament d'Enginyeria Quimica, Universitat Rovira i Virgili, Av. Països Catalans 26, 43007, Tarragona, Catalonia, Spain
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Zhang Y, Zhou L, Li S, Liu J, Sun S, Ji X, Yan C, Xu J. Impacts of lead exposure and chelation therapy on bone metabolism during different developmental stages of rats. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 183:109441. [PMID: 31404725 DOI: 10.1016/j.ecoenv.2019.109441] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Revised: 07/08/2019] [Accepted: 07/09/2019] [Indexed: 06/10/2023]
Abstract
OBJECTIVE To explore the impacts of Pb exposure and the dimercaptosuccinic acid (DMSA) chelation therapy on bone metabolisms in young rats of different ages, as well as the potential mechanisms. METHOD Young rats were exposed to 0.05%-0.1% Pb acetate for 19 days, during infanthood (postnatal day, PND2-20), childhood (PND21-39) and adolescenthood (PND40-58) respectively. In each developmental stage, rats were further divided into three subgroups: lead-exposed, one-course and two-course DMSA chelation therapy subgroups. Blood/bone lead concentrations, serum calciotropic hormones concentrations, and mRNA and protein expressions of bone turnover markers in the serum and bones were measured. Bone microstructures were analyzed using Micro-CT. RESULTS Compared with lead-exposed during childhood and adolescenthood, increases in blood/bone lead levels, and the changes of blood/bone lead and trabecular bone microstructures after one-course DMSA chelation were most significant in rats lead-exposed during infanthood (P < .05). The serum osteocalcin (OC) concentrations, mRNA/protein expressions of OC and runt-related transcription factor 2 (RUNX2) in bones all decreased after Pb exposure, along with significant increases in serum C-terminal telopeptide of type I collagen (CTX) concentrations (P < .05). These effects were accompanied by changes of serum parathormone (PTH) and 1,25-dihydroxyvitamin D3 (1,25-(OH2)-D3) concentrations. DMSA chelation partially reversed the changes of bone microarchitectures, bone formation and resorption markers, and calciotropic-hormones, and the efficiency was greatest when the therapy was provided during infanthood. CONCLUSION Developmental Pb exposure impaired bone microstructures and interfered bone metabolism, and the exposure effect was more obvious during infanthood than during childhood and adolescenthood. Lead effects were partially reversed by chelation therapy, and the efficacy may be most significant when the therapy was provided at younger ages.
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Affiliation(s)
- Yijing Zhang
- Xinhua Hospital, MOE-Shanghai Key Laboratory of Children's Environmental Health, Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, China; The International Peace Maternity & Child Health Hospital of China Welfare Institute, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Leilei Zhou
- Xinhua Hospital, MOE-Shanghai Key Laboratory of Children's Environmental Health, Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, China
| | - Shufang Li
- Xinhua Hospital, MOE-Shanghai Key Laboratory of Children's Environmental Health, Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, China
| | - Junxia Liu
- Xinhua Hospital, MOE-Shanghai Key Laboratory of Children's Environmental Health, Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, China
| | - Shuangyuan Sun
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai, 200336, China
| | - Xiaofan Ji
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai, 200336, China
| | - Chonghuai Yan
- Xinhua Hospital, MOE-Shanghai Key Laboratory of Children's Environmental Health, Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, China
| | - Jian Xu
- Xinhua Hospital, MOE-Shanghai Key Laboratory of Children's Environmental Health, Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, China; The International Peace Maternity & Child Health Hospital of China Welfare Institute, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
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Bocca B, Ruggieri F, Pino A, Rovira J, Calamandrei G, Martínez MÁ, Domingo JL, Alimonti A, Schuhmacher M. Human biomonitoring to evaluate exposure to toxic and essential trace elements during pregnancy. Part A. concentrations in maternal blood, urine and cord blood. ENVIRONMENTAL RESEARCH 2019; 177:108599. [PMID: 31374401 DOI: 10.1016/j.envres.2019.108599] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Revised: 07/19/2019] [Accepted: 07/19/2019] [Indexed: 06/10/2023]
Abstract
Exposures to toxic elements or deficiencies of essential elements during pregnancy may be associated to various birth complications or even diseases in early life. The aim of this paper was to assess the concentrations of selected toxic (As, Cd, Cr, Hg, Ni, Pb) and essential trace elements (Co, Cu, Mn, Se and Zn) in blood and urine samples of delivering women at different periods of gestation and cord blood, as well as to evaluate the placental permeability for these elements. A total of 53 women participating in the HEALS-EXHES study were enrolled. In particular, 48 blood samples from 1st trimester of pregnancy, 40 blood samples at delivery, and 31 cord blood at delivery were collected. Moreover, mothers' urine were sampled at the 1st (53 samples), 2nd (53 samples) and 3rd trimester (49 samples) of pregnancy. Results showed that Hg and Mn levels in cord blood were about 2.0 times higher than in maternal blood, suggesting that these elements may be transferred from mother to fetus. The cord blood levels of As and Pb were lower (ca. the 65%) than those in maternal blood, showing that the placenta modulates the rate of transfer for these elements. Essential elements as Cu and Zn showed significantly lower levels in cord than in maternal blood suggesting that the transplacental transfer of these nutrients was very limited. In addition, correlation between paired maternal and cord blood samples for As, Hg and Pb was statistically significant indicating that the fetal body burden may reflect the maternal exposure. Cadmium, Co, Cr, Ni and Se levels did not show significant correlations between maternal and cord blood. Maternal urinary concentrations of trace elements, including As, Cr, Cu, Hg, Se and Zn decreased along pregnancy, which may cause variations in fetal exposure. The levels of toxic and essential elements in maternal blood and urine, as well as in cord blood, were for most elements at the lower end of the ranges found in the scientific literature not being of special concern for pregnant women and the unborn.
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Affiliation(s)
| | | | - Anna Pino
- Istituto Superiore di Sanità, Rome, Italy
| | - Joaquim Rovira
- Laboratory of Toxicology and Environmental Health, School of Medicine, IISPV, Universitat Rovira I Virgili, Sant Llorenç 21, 43201, Reus, Catalonia, Spain; Environmental Engineering Laboratory, Departament D'Enginyeria Quimica, Universitat Rovira I Virgili, Av. Països Catalans 26, 43007, Tarragona, Catalonia, Spain
| | | | - María Ángeles Martínez
- Environmental Engineering Laboratory, Departament D'Enginyeria Quimica, Universitat Rovira I Virgili, Av. Països Catalans 26, 43007, Tarragona, Catalonia, Spain
| | - José L Domingo
- Laboratory of Toxicology and Environmental Health, School of Medicine, IISPV, Universitat Rovira I Virgili, Sant Llorenç 21, 43201, Reus, Catalonia, Spain
| | | | - Marta Schuhmacher
- Laboratory of Toxicology and Environmental Health, School of Medicine, IISPV, Universitat Rovira I Virgili, Sant Llorenç 21, 43201, Reus, Catalonia, Spain; Environmental Engineering Laboratory, Departament D'Enginyeria Quimica, Universitat Rovira I Virgili, Av. Països Catalans 26, 43007, Tarragona, Catalonia, Spain
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Placental metal concentrations and birth outcomes: The Environment and Childhood (INMA) project. Int J Hyg Environ Health 2019; 222:468-478. [PMID: 30638867 DOI: 10.1016/j.ijheh.2018.12.014] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2018] [Revised: 12/30/2018] [Accepted: 12/31/2018] [Indexed: 01/26/2023]
Abstract
OBJECTIVE To examine the association of placental levels of arsenic (As), cadmium (Cd), mercury (Hg), lead (Pb), manganese (Mn), and chromium (Cr) with birth outcomes (birth weight, length, and head circumference, low birth weight [LBW], gestational age, preterm delivery, and small for gestational age [SGA]) in mother-child pairs from the Environment and Childhood (INMA) Project in Spain. METHODS Metal concentrations were measured in placenta tissue samples randomly selected from five INMA cohorts. Data on birth outcomes were obtained from medical records. Associations were assessed in a sub-sample of 327 mother-infant pairs by regression models adjusted for confounding factors and for all metals simultaneously. Effect modification by sex was also evaluated. RESULTS Elevated placental Cd levels (>5.79 vs. <3.30 ng/g) were associated with reduced birth weight (-111.8 g, 95%CI = -215.6; -8.06, p-trend = 0.01) and length (-0.62 cm, 95%CI = -1.20; -0.04, p-trend = 0.02), while a 10% increase in Cd was associated with 1.21-fold increased odds (95%CI = 1.01; 1.43) of LBW in the global sample but with 14% lower odds (95%CI = 0.78; 0.96) of preterm delivery in males (Pinteraction = 0.10). Detected (vs. undetected) Hg was associated with reduced head circumference (-0.49 cm, 95%CI = -1.00; 0.03) in females (Pinteraction = 0.03). A 10% increase in placental Mn was associated with slight increases in gestational age (0.04 weeks, 95%CI = 0.01; 0.07) in the global sample and in head circumference (0.05 cm, 95%CI = -0.01; 0.10) in females (Pinteraction = 0.03). Elevated Cr levels (>99.6 vs. <56.1 ng/g) were associated with reduced birth length (-0.68 cm, 95%CI = -1.33; -0.04, p-trend = 0.02) and slightly increased gestational age (0.35 weeks, 95%CI = -0.07; 0.77, p-trend = 0.08) in the global sample. As and Pb were detected in few placentas (27% and 13%, respectively) and were not associated with any studied birth outcome. CONCLUSIONS Data suggest that in utero exposure to Cd, Hg, and Cr could adversely affect fetal growth, whereas Mn and Cr appear to have a positive effect on gestational age. Given the relatively small number of subjects, sex-specific associations should be interpreted with caution.
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Bede-Ojimadu O, Amadi CN, Orisakwe OE. Blood Lead Levels in Women of Child-Bearing Age in Sub-Saharan Africa: A Systematic Review. Front Public Health 2018; 6:367. [PMID: 30619808 PMCID: PMC6305709 DOI: 10.3389/fpubh.2018.00367] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Accepted: 11/30/2018] [Indexed: 11/13/2022] Open
Abstract
This paper reported available studies on blood lead level of childbearing age in Sub-Saharan African women. PubMed and Google scholar databases were searched for original articles reporting blood lead levels of women of childbearing age in Sub-Saharan Africa. Searches were not limited to year of study but limited to studies published in English Language. Data were extracted and synthesized by estimating the weighted mean of the reported blood lead levels. Fifteen papers fulfilled the inclusion criteria. Mean blood lead levels of women in the studies ranged from 0.83 to 99 μg/dl. The overall weighted mean of blood lead levels was 24.73 μg/dl. The weighted mean from analyses of data on blood lead levels of pregnant women alone was 26.24 μg/dl. Identified sources of lead exposure included lead mine, informal lead-acid battery recycling, leaded gasoline and piped water. Elevated BLLs were associated with incidence of preeclampsia, hypertension, and malaria. Important contributing factors for elevated blood lead levels (BLL) in these women include poverty, high environmental lead burden, low awareness on lead exposure hazards and lack of regulation for lead in consumer products. BLLs of women of childbearing age in SSA are unacceptably high. There is need therefore, for aggressive programs to address lead exposure in this population.
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Affiliation(s)
- Onyinyechi Bede-Ojimadu
- Department of Chemical pathology, Faculty of Medicine, Nnamdi Azikiwe University, Awka, Nigeria
| | - Cecilia Nwadiuto Amadi
- Department of Experimental Pharmacology & Toxicology, Faculty of Pharmacy, University of Port-Harcourt, Port-Harcourt, Nigeria
| | - Orish Ebere Orisakwe
- Department of Experimental Pharmacology & Toxicology, Faculty of Pharmacy, University of Port-Harcourt, Port-Harcourt, Nigeria
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Yan J, Gao Z, Wang J, Ma W, Ying X, Zhou C, Yan C. Family environmental and dietary implications for low-level prenatal lead exposure in Wujiang City, China. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:12780-12787. [PMID: 29473138 DOI: 10.1007/s11356-017-1102-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Accepted: 12/19/2017] [Indexed: 06/08/2023]
Abstract
To explore the potential environmental and dietary factors during pregnancy affecting low-level prenatal lead exposure, we conducted a longitudinal study in Wujiang City, China. A total of 1976 mother-infant pairs were included from 2009 to 2010. An interviewed questionnaire was conducted and cord blood samples were collected. The geometric means of cord blood lead level was 30.3 μg/L (95% CI, 29.8-30.8) with 99.24% below 100 μg/L. Maternal age, passive smoking, and living in the countryside were significantly associated with cord blood lead concentrations. Multiple logistic models showed that some family environmental factors including using firewood and electricity as kitchen fuel were positively correlated with increased cord blood lead levels. Among dietary sources recorded in this study, meat consumption (> 3 times/week), fish consumption (1-3 times/week), vegetables consumption (> 1 times/day), and fruit intake (> 1 times/day) had inverse relationship with cord blood lead levels. In general, our findings may have important implications for family environmental and dietary direction during pregnancy to decrease prenatal lead exposure.
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Affiliation(s)
- Jin Yan
- MOE-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital, Shanghai Jiao Tong University of Medicine, 1665 Kongjiang Road, Shanghai, 200092, China
| | - Zhenyan Gao
- MOE-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital, Shanghai Jiao Tong University of Medicine, 1665 Kongjiang Road, Shanghai, 200092, China
| | - Ju Wang
- MOE-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital, Shanghai Jiao Tong University of Medicine, 1665 Kongjiang Road, Shanghai, 200092, China
| | - Wenjuan Ma
- MOE-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital, Shanghai Jiao Tong University of Medicine, 1665 Kongjiang Road, Shanghai, 200092, China
| | - Xiaolan Ying
- MOE-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital, Shanghai Jiao Tong University of Medicine, 1665 Kongjiang Road, Shanghai, 200092, China
| | - Cancan Zhou
- MOE-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital, Shanghai Jiao Tong University of Medicine, 1665 Kongjiang Road, Shanghai, 200092, China
| | - Chonghuai Yan
- MOE-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital, Shanghai Jiao Tong University of Medicine, 1665 Kongjiang Road, Shanghai, 200092, China.
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Freire C, Amaya E, Gil F, Fernández MF, Murcia M, Llop S, Andiarena A, Aurrekoetxea J, Bustamante M, Guxens M, Ezama E, Fernández-Tardón G, Olea N. Prenatal co-exposure to neurotoxic metals and neurodevelopment in preschool children: The Environment and Childhood (INMA) Project. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 621:340-351. [PMID: 29190557 DOI: 10.1016/j.scitotenv.2017.11.273] [Citation(s) in RCA: 90] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Revised: 11/06/2017] [Accepted: 11/24/2017] [Indexed: 05/04/2023]
Abstract
We sought to determine whether prenatal co-exposure to As, Cd, Hg, Mn, and Pb was associated with impaired neurodevelopment in preschool children from the Spanish Environment and Childhood (INMA) Project, using the placenta as exposure matrix. We measured metal levels in placenta tissue samples randomly selected from five of the seven population-based birth cohorts participating in the INMA Project, collected between 2000 and 2008. Neuropsychological assessment of cognitive and motor function was carried through the use of the McCarthy Scales of Children's Abilities (MSCA) at the age of 4-5years. Data on placental metal levels, MSCA scores, and relevant covariates was available for 302 children. Mn was detected in all placental samples, Cd in nearly all placentas (99%) and As, Hg, and Pb in 22%, 58%, and 17% of the placentas, respectively. After adjusting for potential confounders, detectable As levels were associated with decrements in global and verbal executive functions and quantitative abilities; detectable Hg was associated with lower scores on the verbal function of posterior cortex in a dose-response manner, and non-linearly related to poorer motor function and gross motor skills; and Mn levels were associated with decrement in perceptual-performance skills in a dose-response manner but with better memory span and quantitative skills. A synergistic interactive effect was found between As and Pb with respect to the general cognitive score, whereas an antagonistic interaction was found between Mn and Hg. Prenatal exposure to As and Hg may be a risk factor for cognitive and motor impairment in children, while the effects of Cd and Mn on neurodevelopment are less clear. Future studies should examine combined and interactive effects of exposure to multiple metals during vulnerable periods of brain development prospectively.
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Affiliation(s)
- Carmen Freire
- Health Research Institute of Granada (ibs.GRANADA), 18012 Granada, Spain; Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Spain
| | - Esperanza Amaya
- Health Research Institute of Granada (ibs.GRANADA), 18012 Granada, Spain
| | - Fernando Gil
- Department of Legal Medicine, Toxicology, and Physical Anthropology, School of Medicine, University of Granada, 18071 Granada, Spain
| | - Mariana F Fernández
- Health Research Institute of Granada (ibs.GRANADA), 18012 Granada, Spain; Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Spain; Department of Radiology, School of Medicine, and Centre for Biomedical Research, University of Granada, 18071 Granada, Spain.
| | - Mario Murcia
- Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Spain; Epidemiology and Environmental Health Joint Research Unit, FISABIO-Jaume I University-University of Valencia, 46020 Valencia, Spain
| | - Sabrina Llop
- Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Spain; Epidemiology and Environmental Health Joint Research Unit, FISABIO-Jaume I University-University of Valencia, 46020 Valencia, Spain
| | - Ainara Andiarena
- BIODONOSTIA Health Research Institute, 20014 San Sebastián, Spain; University of the Basque Country (UPV/EHU), 20018 San Sebastián, Spain
| | - Juanjo Aurrekoetxea
- Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Spain; BIODONOSTIA Health Research Institute, 20014 San Sebastián, Spain; Department of Preventive Medicine and Public Health, University of Basque Country (UPV/EHU), 48940 Leioa, Bizkaia, Spain; Subdirección de Salud Pública de Gipuzkoa, Department of Health of the Basque Government, 20013 San Sebastián, Spain
| | - Mariona Bustamante
- Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Spain; ISGlobal, Centre for Research in Environmental Epidemiology (CREAL), 08036 Barcelona, Spain; Pompeu Fabra Universtiy (UPF), 08002 Barcelona, Spain; Genomics and Disease Group, Bioinformatics and Genomics Program, Centre for Genomic Regulation (CRG), 08003 Barcelona, Spain
| | - Mònica Guxens
- Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Spain; ISGlobal, Centre for Research in Environmental Epidemiology (CREAL), 08036 Barcelona, Spain; Pompeu Fabra Universtiy (UPF), 08002 Barcelona, Spain; Department of Child and Adolescent Psychiatry/Psychology, Erasmus University Medical Centre-Sophia Children's Hospital, 3015 CN Rotterdam, Netherlands
| | - Esteban Ezama
- Cicom, Alternativa en Salud Mental, 33001 Oviedo, Spain
| | - Guillermo Fernández-Tardón
- Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Spain; Department of Preventive Medicine and Public Health, School of Medicine, University of Oviedo, 33003 Oviedo, Spain
| | - Nicolás Olea
- Health Research Institute of Granada (ibs.GRANADA), 18012 Granada, Spain; Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Spain; Department of Radiology, School of Medicine, and Centre for Biomedical Research, University of Granada, 18071 Granada, Spain
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Saoudi A, Dereumeaux C, Goria S, Berat B, Brunel S, Pecheux M, de Crouy-Chanel P, Zeghnoun A, Rambaud L, Wagner V, le Tertre A, Fillol C, Vandentorren S, Guldner L. Prenatal exposure to lead in France: Cord-blood levels and associated factors: Results from the perinatal component of the French Longitudinal Study since Childhood (Elfe). Int J Hyg Environ Health 2018; 221:441-450. [PMID: 29352707 DOI: 10.1016/j.ijheh.2018.01.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Revised: 12/22/2017] [Accepted: 01/10/2018] [Indexed: 10/18/2022]
Abstract
BACKGROUND As a result of the ban on lead in gasoline on 2nd January 2000, the French population's exposure to lead has decreased in recent years. However, because of the acknowledged harmful cognitive effects of lead even at low levels, lead exposure remains a major public health issue. In France, few biomonitoring data are available for exposure to lead in pregnant women and newborn. The purpose of the perinatal component of the French human biomonitoring (HBM) program was to describe levels of various biomarkers of exposure to several environmental pollutants, including lead, among mother-baby pairs. In this paper, we aimed to describe the distribution of cord blood lead levels (CBLL) in French mother-baby pairs, and to estimate the contribution of the main lead exposure risk factors to these levels. METHOD A total of 1968 mother-baby pairs selected from the participants of the perinatal component of the French HBM program were included in the study on lead. Lead levels were analyzed in cord blood collected at child delivery by inductively coupled plasma-mass spectrometry (ICP-MS). The data collected included biological sample, socio-demographic characteristics, environmental and occupational exposure, and information on dietary factors. RESULTS CBLL were quantified for 99.5% of the sample. The CBLL geometric mean was 8.30 μg/l (95% CI [7.94-8.68]) with a 95th percentile of 24.3 μg/l (95% CI [20.7-27.1]). Factors significantly associated with CBLL were tap water consumption, alcohol consumption, shellfish consumption, vegetable consumption, bread consumption, smoking, and the mother being born in countries where lead is often used. CONCLUSION This study provides the first reference value for CBLL in a random sample of mother-baby pairs not particularly exposed to high levels of lead (24.3 μg/l). A substantial decrease in CBLL over time was observed, which confirms the decrease of exposure to lead among the general population. CBLL observed in this French study were in the range of those found in recent surveys conducted in other countries.
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Affiliation(s)
- Abdessattar Saoudi
- Direction of Environmental Health, Santé publique France, The French Public Health Agency, 12 rue du Val d'Osne, 94415 Saint Maurice cedex, France.
| | - Clémentine Dereumeaux
- Direction of Environmental Health, Santé publique France, The French Public Health Agency, 12 rue du Val d'Osne, 94415 Saint Maurice cedex, France
| | - Sarah Goria
- Direction of Environmental Health, Santé publique France, The French Public Health Agency, 12 rue du Val d'Osne, 94415 Saint Maurice cedex, France
| | - Bénédicte Berat
- Direction of Environmental Health, Santé publique France, The French Public Health Agency, 12 rue du Val d'Osne, 94415 Saint Maurice cedex, France
| | - Serge Brunel
- Direction of Environmental Health, Santé publique France, The French Public Health Agency, 12 rue du Val d'Osne, 94415 Saint Maurice cedex, France
| | - Marie Pecheux
- Direction of Environmental Health, Santé publique France, The French Public Health Agency, 12 rue du Val d'Osne, 94415 Saint Maurice cedex, France
| | - Perrine de Crouy-Chanel
- Direction of Environmental Health, Santé publique France, The French Public Health Agency, 12 rue du Val d'Osne, 94415 Saint Maurice cedex, France
| | - Abdelkrim Zeghnoun
- Direction of Environmental Health, Santé publique France, The French Public Health Agency, 12 rue du Val d'Osne, 94415 Saint Maurice cedex, France
| | - Loïc Rambaud
- Direction of Environmental Health, Santé publique France, The French Public Health Agency, 12 rue du Val d'Osne, 94415 Saint Maurice cedex, France
| | - Vérène Wagner
- Direction of Environmental Health, Santé publique France, The French Public Health Agency, 12 rue du Val d'Osne, 94415 Saint Maurice cedex, France
| | - Alain le Tertre
- Direction of Environmental Health, Santé publique France, The French Public Health Agency, 12 rue du Val d'Osne, 94415 Saint Maurice cedex, France
| | - Clémence Fillol
- Direction of Environmental Health, Santé publique France, The French Public Health Agency, 12 rue du Val d'Osne, 94415 Saint Maurice cedex, France
| | - Stéphanie Vandentorren
- Direction of Environmental Health, Santé publique France, The French Public Health Agency, 12 rue du Val d'Osne, 94415 Saint Maurice cedex, France
| | - Laurence Guldner
- Direction of Environmental Health, Santé publique France, The French Public Health Agency, 12 rue du Val d'Osne, 94415 Saint Maurice cedex, France
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Hasan Rhaif Al-Sahlanee M, Maizan Ramli R, Abdul Hassan Ali M, Fadhil Tawfiq N, Zahirah Noor Azman N, Abdul Rahman A, Shahrim Mustafa I, Noor Ashikin Nik Abdul Razak N, Zakiah Yahaya N, Mohammed Al-Marri H, Syuhada Ayob N, Zakaria N. Trace of heavy metals in maternal and umbilical cord blood samples in association with birth outcomes in Baghdad, Iraq. EPJ WEB OF CONFERENCES 2017. [DOI: 10.1051/epjconf/201715600003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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18
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La biomonitorización de sustancias tóxicas en muestras biológicas de población general. GACETA SANITARIA 2016; 30 Suppl 1:45-54. [DOI: 10.1016/j.gaceta.2016.02.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Revised: 02/24/2016] [Accepted: 02/26/2016] [Indexed: 11/23/2022]
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Wang A, Padula A, Sirota M, Woodruff TJ. Environmental influences on reproductive health: the importance of chemical exposures. Fertil Steril 2016; 106:905-29. [PMID: 27513554 PMCID: PMC5158104 DOI: 10.1016/j.fertnstert.2016.07.1076] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Revised: 07/12/2016] [Accepted: 07/13/2016] [Indexed: 12/09/2022]
Abstract
Chemical exposures during pregnancy can have a profound and life-long impact on human health. Because of the omnipresence of chemicals in our daily life, there is continuous contact with chemicals in food, water, air, and consumer products. Consequently, human biomonitoring studies show that pregnant women around the globe are exposed to a variety of chemicals. In this review we provide a summary of current data on maternal and fetal exposure, as well as health consequences from these exposures. We review several chemical classes, including polychlorinated biphenyls, perfluoroalkyl substances, polybrominated diphenyl ethers, phenols, phthalates, pesticides, and metals. Additionally, we discuss environmental disparities and vulnerable populations, and future research directions. We conclude by providing some recommendations for prevention of chemical exposure and its adverse reproductive health consequences.
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Affiliation(s)
- Aolin Wang
- Program on Reproductive Health and the Environment, Department of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, San Francisco, California; Institute for Computational Health Sciences, University of California, San Francisco, San Francisco, California
| | - Amy Padula
- Program on Reproductive Health and the Environment, Department of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, San Francisco, California
| | - Marina Sirota
- Institute for Computational Health Sciences, University of California, San Francisco, San Francisco, California
| | - Tracey J Woodruff
- Program on Reproductive Health and the Environment, Department of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, San Francisco, California.
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Abstract
BACKGROUND Exposure to unhealthy and unsafe environments cause 1 in 4 deaths in childhood each year. Early exposure to lead beginning prenatally and continuing throughout childhood is one of the mechanisms associated with unhealthy and unsafe environments, particularly in industrial countries and urban communities. Lead is a known heavy metal that crosses the placenta and blood-brain barrier depositing in fetal tissues. PURPOSE The purpose of this integrative review was to determine which maternal-fetal dyads were at high risk for elevated umbilical cord lead (Pb) levels and to examine the consequences associated with elevated umbilical cord Pb levels. SEARCH STRATEGY PubMed was searched to obtain English language publications from 2005 to March 2015 for studies examining the effects of prenatal lead exposure on infant outcomes using key terms "lead" combined with "infant." A total of 17 articles were retained for analysis. FINDINGS Infants with elevated umbilical cord blood lead levels were associated with maternal demographic factors and country of origin. Maternal-specific exposure to lead products prior to or during pregnancy was associated with elevated umbilical cord blood lead levels. The consequences of prenatal lead exposure to the infant at birth anthropometrically were mixed. The evidence on neurological consequences of prenatal exposure to lead appears to reflect changes in cognitive impairment; however, it needs further study. IMPLICATIONS FOR PRACTICE The major recommendation is primary prevention of lead exposure across the life span. Implementation of policies that reduce the availability of leaded products to reduce leaded products, especially ones aimed at children and women of childbearing age. IMPLICATIONS FOR RESEARCH Research needs to be focused in 2 directions: (1) prevention of lead exposure during pregnancy and (2) prevention of lead leaching from bones for all women of childbearing age.
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Lertxundi A, Baccini M, Lertxundi N, Fano E, Aranbarri A, Martínez MD, Ayerdi M, Álvarez J, Santa-Marina L, Dorronsoro M, Ibarluzea J. Exposure to fine particle matter, nitrogen dioxide and benzene during pregnancy and cognitive and psychomotor developments in children at 15 months of age. ENVIRONMENT INTERNATIONAL 2015; 80:33-40. [PMID: 25881275 DOI: 10.1016/j.envint.2015.03.007] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Revised: 02/14/2015] [Accepted: 03/02/2015] [Indexed: 05/05/2023]
Abstract
BACKGROUND Prenatal exposure to air pollutants has recently been identified as a potential risk factor for neuropsychological impairment. OBJECTIVES To assess whether prenatal exposure to fine particulate matter (PM2.5), nitrogen dioxide (NO2) and benzene were associated with impaired development in infants during their second year of life. METHODS Regression analyses, based on 438 mother-child pairs, were performed to estimate the association between mother exposure to air pollutants during pregnancy and neurodevelopment of the child. The average exposure to PM2.5, NO2 and benzene over the whole pregnancy was calculated for each woman. During the second year of life, infant neuropsychological development was assessed using the Bayley Scales of Infant Development. Regression analyses were performed to estimate the association between exposure and outcomes, accounting for potential confounders. RESULTS We estimated that a 1 μg/m(3) increase during pregnancy in the average levels of PM2.5 was associated with a -1.14 point decrease in motor score (90% CI: -1.75; -0.53) and that a 1 μg/m(3) increase of NO2 exposure was associated with a -0.29 point decrease in mental score (90% CI: -0.47; -0.11). Benzene did not show any significant association with development. Considering women living closer (≤ 100 m) to metal processing activities, we found that motor scores decreased by -3.20 (90% CI: -5.18; -1.21) for PM2.5 and -0.51 (-0.89; -0.13) for NO2, while mental score decreased by -2.71 (90% CI: -4.69; -0.74) for PM2.5, and -0.41 (9% CI: -0.76; -0.06) for NO2. CONCLUSIONS Our findings suggest that prenatal residential exposure to PM2.5 and NO2 adversely affects infant motor and cognitive developments. This negative effect could be higher in the proximity of metal processing plants.
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Affiliation(s)
- Aitana Lertxundi
- Faculty of Medicine, University of the Basque Country (UPV/EHU), Leioa, Basque Country, Spain; BIODONOSTIA Health Research Institute, San Sebastian, Basque Country, Spain
| | - Michela Baccini
- Department of Statistics, Informatics and Applications "G. Parenti", University of Florence, Italy; Biostatistics Unit, Cancer Prevention and Research Institute (ISPO), Florence, Italy
| | - Nerea Lertxundi
- BIODONOSTIA Health Research Institute, San Sebastian, Basque Country, Spain; Faculty of Psychology, University of the Basque Country UPV/EHU, San Sebastian, Basque Country, Spain
| | - Eduardo Fano
- BIODONOSTIA Health Research Institute, San Sebastian, Basque Country, Spain; Faculty of Psychology, University of the Basque Country UPV/EHU, San Sebastian, Basque Country, Spain
| | - Aritz Aranbarri
- BIODONOSTIA Health Research Institute, San Sebastian, Basque Country, Spain; Faculty of Psychology, University of the Basque Country UPV/EHU, San Sebastian, Basque Country, Spain
| | - Maria Dolores Martínez
- BIODONOSTIA Health Research Institute, San Sebastian, Basque Country, Spain; Department of the Environment and Regional Planning, Government of the Basque Country, Vitoria, Spain
| | - Mikel Ayerdi
- BIODONOSTIA Health Research Institute, San Sebastian, Basque Country, Spain; Sub-Directorate for Public Health of Guipúzcoa, Department of Health, Government of the Basque Country, San Sebastian, Spain
| | - Jon Álvarez
- Public Health Laboratory, Department of Health, Government of the Basque Country, Bilbao, Spain
| | - Loreto Santa-Marina
- BIODONOSTIA Health Research Institute, San Sebastian, Basque Country, Spain; Sub-Directorate for Public Health of Guipúzcoa, Department of Health, Government of the Basque Country, San Sebastian, Spain; Biomedical Research Centre Network for Epidemiology and Public Health (CIBERESP), Spain
| | - Miren Dorronsoro
- BIODONOSTIA Health Research Institute, San Sebastian, Basque Country, Spain; Sub-Directorate for Public Health of Guipúzcoa, Department of Health, Government of the Basque Country, San Sebastian, Spain; Biomedical Research Centre Network for Epidemiology and Public Health (CIBERESP), Spain
| | - Jesus Ibarluzea
- BIODONOSTIA Health Research Institute, San Sebastian, Basque Country, Spain; Sub-Directorate for Public Health of Guipúzcoa, Department of Health, Government of the Basque Country, San Sebastian, Spain; Biomedical Research Centre Network for Epidemiology and Public Health (CIBERESP), Spain.
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22
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Dursun A, Yurdakok K, Yalcin SS, Tekinalp G, Aykut O, Orhan G, Morgil GK. Maternal risk factors associated with lead, mercury and cadmium levels in umbilical cord blood, breast milk and newborn hair. J Matern Fetal Neonatal Med 2015; 29:954-61. [PMID: 25835381 DOI: 10.3109/14767058.2015.1026255] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE Lead (Pb), mercury (Hg) and cadmium (Cd) are environmental pollutants that are wide spread throughout the world. The present study aimed to investigate the level of exposure to Pb, Hg and Cd during the prenatal period, and the possible routes of maternal exposure to these toxic heavy metals. PARTICIPANTS The study included 123 mothers and their newborns. Umbilical cord blood samples were collected immediately after delivery, and breast milk and newborn hair samples were collected between postpartum d 3 and 10. RESULTS Among the 121 cord blood samples that were analyzed, Pb was present in 120 (99.2%) and the mean level was 1.66 ± 1.60 µg dL(-1) (range: <detection limit-12.50 µg dL(-1)), whereas Hg was noted in only 2 (1.7%) (15.74 and 33.20 µgL(-1)) and Cd was detected in 24 (19.8%) (range: < detection limit-6.71 µgL(-1)). The level of Pb in cord blood was ≥2 µg dL(-1) in 29% of the samples. Pb, Hg and Cd were detectable in all the newborn hair samples. DISCUSSION Among the 107 breast milk samples analyzed, 89 (83.2%) had a detectable level of Pb and the mean level was 14.56 ± 12.13 µgL(-1). Detection rate of Cd in breast milk was higher in women who resided near to city waste disposal site. Detection rate of Cd in cord blood was significantly higher in the women who consumed ≥2 servings of fish weekly. Maternal exposure to environmental tobacco smoke (ETS) resulted in elevated levels of Pb and Cd in newborn hair samples. CONCLUSION Most of the study samples had detectable levels of Pb, Hg and Cd, indicating that there was long-term maternal exposure prior to and during pregnancy, and a considerable number of the cord and breast milk samples had levels that exceeded the present accepted safety level.
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Affiliation(s)
- Arzu Dursun
- a Unit of Neonatology, Department of Pediatrics , Dr. Sami Ulus Maternity and Children's Health and Diseases Training and Research Hospital , Ankara , Turkey
| | | | | | - Gulsevin Tekinalp
- c Unit of Neonatology, Department of Pediatrics , Hacettepe University Faculty of Medicine , Ankara , Turkey , and
| | - Osman Aykut
- d Analytic Toxicology Laboratory , Refik Saydam National Public Health Agency , Ankara , Turkey
| | - Gunnur Orhan
- d Analytic Toxicology Laboratory , Refik Saydam National Public Health Agency , Ankara , Turkey
| | - Goksel Koc Morgil
- d Analytic Toxicology Laboratory , Refik Saydam National Public Health Agency , Ankara , Turkey
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23
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Choi J, Aarøe Mørck T, Polcher A, Knudsen LE, Joas A. Review of the state of the art of human biomonitoring for chemical substances and its application to human exposure assessment for food safety. ACTA ACUST UNITED AC 2015. [DOI: 10.2903/sp.efsa.2015.en-724] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Judy Choi
- Judy Choi Alexandra Polcher Anke Joas
| | | | | | | | - Anke Joas
- Judy Choi Alexandra Polcher Anke Joas
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24
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Martins E, Varea A, Apezteguía M, González HF, Girardelli A, Caro LS, Lobisuto M, Delgado G, Disalvo L. Prenatal lead exposure and relationship with maternal exposure determinants in a public maternity hospital of La Plata, Argentina. THE SCIENCE OF THE TOTAL ENVIRONMENT 2014; 473-474:43-47. [PMID: 24361446 DOI: 10.1016/j.scitotenv.2013.11.128] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2013] [Revised: 11/25/2013] [Accepted: 11/26/2013] [Indexed: 06/03/2023]
Abstract
Prenatal lead exposure is a health hazard that may cause cognitive development impairments and other adverse effects in children. We conducted a cross sectional study analyzing cord blood lead levels (CBLL) of newborns and their relationship with maternal determinants of lead exposure. Mothers answered a questionnaire about socio-demographic, lifestyle habits and environmental characteristics. We used Mann-Whitney's test to compare CBLL geometrical means (GM) corresponding to the presence or absence of each lead exposure determinant, and Chi square test to study the relationship between CBLL and maternal lead exposure determinants. A total of 159 newborns participated in the study. CBLL GM was 2.1 μg/dL; and 25% of the participants had a measurable CBLL (LOQ=3.3 μg/dl). Although the participants had several determinants of lead exposure, we only found a significant relationship with inside household determinants, such as presence of lead piping (p=0.026), unplastered walls (p=0.046) and peeling paint (p=0.048). Our results show that CBLL GM was similar to that reported in several studies conducted around the world. However, 25% of the participants might have some degree of risk for lead poisoning.
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Affiliation(s)
- Enrique Martins
- Instituto de Desarrollo e Investigaciones Pediátricas (IDIP) "Prof. Dr. Fernando E. Viteri", Hospital de Niños de La Plata (Ministerio de Salud/CIC-PBA), La Plata, Argentina.
| | - Ana Varea
- Instituto de Desarrollo e Investigaciones Pediátricas (IDIP) "Prof. Dr. Fernando E. Viteri", Hospital de Niños de La Plata (Ministerio de Salud/CIC-PBA), La Plata, Argentina
| | - María Apezteguía
- Instituto de Desarrollo e Investigaciones Pediátricas (IDIP) "Prof. Dr. Fernando E. Viteri", Hospital de Niños de La Plata (Ministerio de Salud/CIC-PBA), La Plata, Argentina
| | - Horacio F González
- Instituto de Desarrollo e Investigaciones Pediátricas (IDIP) "Prof. Dr. Fernando E. Viteri", Hospital de Niños de La Plata (Ministerio de Salud/CIC-PBA), La Plata, Argentina
| | - Ana Girardelli
- Servicio de Toxicología, Hospital de Niños "Sor María Ludovica" de La Plata, Argentina
| | - Laura Sanchez Caro
- Servicio de Neonatología, Hospital Interzonal General de Agudos "Gral. San Martín" de La Plata, Argentina
| | - Mario Lobisuto
- Servicio de Ginecología y Obstetricia, Hospital Interzonal General de Agudos "Gral. San Martín" de La Plata, Argentina
| | - Griselda Delgado
- Servicio de Neonatología, Hospital Interzonal General de Agudos "Gral. San Martín" de La Plata, Argentina
| | - Liliana Disalvo
- Instituto de Desarrollo e Investigaciones Pediátricas (IDIP) "Prof. Dr. Fernando E. Viteri", Hospital de Niños de La Plata (Ministerio de Salud/CIC-PBA), La Plata, Argentina
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Kazi TG, Shah F, Shaikh HR, Afridi HI, Shah A, Arain SS. Exposure of lead to mothers and their new born infants, residents of industrial and domestic areas of Pakistan. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2014; 21:3021-3030. [PMID: 24174313 DOI: 10.1007/s11356-013-2223-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2013] [Accepted: 10/07/2013] [Indexed: 06/02/2023]
Abstract
Prenatal and early-life exposure to lead (Pb) is hypothesized to have adverse effects on childhood health. The aim of this study was to evaluate the prenatal exposure to Pb and its adverse effects on mothers and their infants who are residents of industrial (exposed) and domestic areas (referents) in Karachi, Pakistan. The biological samples (scalp hair and blood) of mother-infants pairs were analyzed for Pb levels by atomic absorption spectrometry after microwave-assisted acid digestion method. The Pb levels in scalp hair and blood samples of exposed mothers were found in the range of 7.52-8.70 μg/g and 115-270 μg/L, respectively, which were significantly higher than those values obtained for referent mothers (p < 0.001). The Pb levels in the blood (umbilical cord) and hair of neonates of exposed mother that were found in the range of 83-178 μg/L and 4.95-7.23 μg/g, respectively, were significantly higher than the obtained values of referent neonates (p > 0.001). The correlation between maternal and cord blood of both groups was found in the range of 0.708-0.724 (p < 0.01). It was observed that there were higher Pb burdens in exposed mothers and their infants as compared to referent mothers-neonates.
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Affiliation(s)
- Tasneem G Kazi
- National Center of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, 76080, Pakistan,
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26
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Makris KC, Andra SS. Limited representation of drinking-water contaminants in pregnancy-birth cohorts. THE SCIENCE OF THE TOTAL ENVIRONMENT 2014; 468-469:165-175. [PMID: 24013514 DOI: 10.1016/j.scitotenv.2013.08.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2013] [Revised: 08/04/2013] [Accepted: 08/04/2013] [Indexed: 06/02/2023]
Abstract
Water contamination and noise have been consistently the least assessed environmental/lifestyle exposures in pregnancy-birth cohorts (PBC). Water quality surveillance data collected during the past decade within urban drinking-water distribution systems call for re-evaluation of water and health issues in the developed world. The objectives of this scientific commentary were to (i) highlight the extent of appraisal of water contamination in exposure assessment studies of PBC, worldwide, and (ii) propose recommendations to increase awareness of emerging water-related risks through their improved representation into PBC study designs in urban centers. Three scientific literature databases (Scopus, PubMed, and Web of Science) were used for a systematic search on worldwide PBC and their publications that considered water contamination and health outcomes. Publicly-available e-databases (ENRIECO, BIRTHCOHORTS, and CHICOS) were also employed for detailed exploration of existing European Union (EU)-based PBC. Out of the 76 PBC identified in the EU territory, only 12 of them incorporated water contamination into their study designs. Among which only 6 PBC published scientific articles that either included data on water contamination and/or water intake estimates. Trihalomethanes but not other disinfection by-products were mostly studied in the PBC around the globe, while fluoride, atrazine, perfluorinated compounds, tetrachloroethylene, and lead were studied to a lesser extent as water contaminants. It appears that chemical-based water contamination and corresponding human exposures represent a largely underappreciated niche of exposure science pertaining to pregnant mother and children's health in PBC. Future PBC studies should grasp this opportunity to substantially reform elements of water contamination in their exposure assessment protocols and effectively combine them with their epidemiological study designs.
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Affiliation(s)
- Konstantinos C Makris
- Cyprus International Institute for Environmental and Public Health in association with Harvard School of Public Health, Cyprus University of Technology, Limassol, Cyprus.
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Freire C, Koifman RJ, Fujimoto D, de Oliveira Souza VC, Barbosa F, Koifman S. Reference values of lead in blood and related factors among blood donors in the Western Amazon, Brazil. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2014; 77:426-440. [PMID: 24627997 DOI: 10.1080/15287394.2013.874303] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The aim of this study was to (1) determine the reference value of blood lead levels (BLL) in a sample of blood donors of Rio Branco, the capital city of Acre, in the Western Brazilian Amazon, and (2) explore factors influencing lead (Pb) exposure levels. Between 2010 and 2011, blood samples were collected from universal blood donors attending the Central Hemotherapic Unit in Rio Branco with a total number of 1196. Information on characteristics of 1183 donors was obtained through questionnaires. Blood Pb concentrations were determined by inductively coupled plasma-mass spectrometry with detection limit of 0.003 μg/L. Association between BLL and participant characteristics was examined by linear regression analysis. Reference values of BLL were calculated as the upper limit of the 95% confidence interval of the 95th percentile. Reference values of BLL were 109.5 μg/L for men, 70.7 μg/L for women, 88.9 μg/L for younger individuals (18-29 yr), 115.3 μg/L for older ones (≥30 yr), 94.2 μg/L for nonsmokers, and 164.5 μg/L for smokers. Levels of BLL were significantly higher in males, subjects older than 29 yr, non-whites, smokers, regular consumers of manioc flour, and donors practicing any activity related to paints, ceramics, pottery, fishing, or firearms. Subjects with higher education, higher income, vitamin intake use, and drinkers of bottled water displayed lower BLL. In general, BLL in men and women from Rio Branco were higher than those described in other adult populations. Prevention of exposure of this population to local sources of Pb needs to be addressed.
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Affiliation(s)
- Carmen Freire
- a National School of Public Health , Oswaldo Cruz Foundation , Rio de Janeiro , Brazil
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28
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Chelchowska M, Ambroszkiewicz J, Jablonka-Salach K, Gajewska J, Maciejewski TM, Bulska E, Laskowska-Klita T, Leibschang J. Tobacco smoke exposure during pregnancy increases maternal blood lead levels affecting neonate birth weight. Biol Trace Elem Res 2013; 155:169-75. [PMID: 23934137 PMCID: PMC3785700 DOI: 10.1007/s12011-013-9775-8] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/02/2013] [Accepted: 07/26/2013] [Indexed: 01/04/2023]
Abstract
To assess the effect of lead exposure from cigarette smoke on fetal growth, blood lead concentrations were measured using inductively coupled plasma mass spectrometry in 150 healthy pregnant women. Mean lead concentrations in plasma and whole blood were significantly higher in the smoking group compared with the nonsmoking group in each trimester of pregnancy (p < 0.001). Logistic regression analysis showed the highest impact of the number of cigarettes smoked per day for serum lead concentration (β = 0.238; p < 0.05), while in whole blood, it was duration of smoking before conception (β = 0.297; p < 0.001). Birth weight of the smoking mothers' infants was significantly lower (mean ± SEM, 3,192 ± 50.8 and 3,569 ± 49.6 g, respectively; p < 0.001) and negatively correlated with lead levels in plasma (r = -0.38; p < 0.001) and in whole blood (r = -0.27; p < 0.001). Therefore, it is suggested that smoking during pregnancy increases lead concentrations in maternal blood. Fetal exposure to low doses of lead in utero may be a serious risk factor causing lower birth weight.
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Affiliation(s)
- Magdalena Chelchowska
- Screening Department, Institute of Mother and Child, Kasprzaka 17a, 01-211, Warsaw, Poland,
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García-Esquinas E, Pérez-Gómez B, Fernández-Navarro P, Fernández MA, de Paz C, Pérez-Meixeira AM, Gil E, Iriso A, Sanz JC, Astray J, Cisneros M, de Santos A, Asensio Á, García-Sagredo JM, García JF, Vioque J, López-Abente G, Pollán M, González MJ, Martínez M, Aragonés N. Lead, mercury and cadmium in umbilical cord blood and its association with parental epidemiological variables and birth factors. BMC Public Health 2013; 13:841. [PMID: 24028648 PMCID: PMC3848449 DOI: 10.1186/1471-2458-13-841] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2013] [Accepted: 09/05/2013] [Indexed: 01/16/2023] Open
Abstract
Background In Spain, few studies have evaluated prenatal exposure to heavy metals. The objective of this study was to describe lead, mercury and cadmium concentrations in blood from a sample of newborn–mother-father trios, as well as to investigate the association between metals in cord blood and parental variables. We also explored the relationship between cord blood metal concentrations and child characteristics at birth. Methods Metal correlations among family members were assessed using Spearman Rank Correlation Coefficient. Linear regression was used to explore the association between parental variables and log-transformed cord blood lead and cord blood mercury concentrations. In the case of cadmium, tobit regression was used due to the existence of samples below the detection limit. The association between cord blood metal concentrations and child characteristics at birth was evaluated using linear regression. Results Geometric means for lead, mercury and cadmium were 14.09 μg/L, 6.72 μg/L and 0.27 μg/L in newborns; 19.80 μg/L, 3.90 μg/L and 0.53 μg/L in pregnant women; and 33.00 μg/L, 5.38 μg/L and 0.49 μg/L in men. Positive correlations were found between metal concentrations among members of the trio. Lead and cadmium concentrations were 15% and 22% higher in newborns from mothers who smoked during pregnancy, while mercury concentrations were 25% higher in newborns from mothers with greater fish intake. Cord-blood lead levels showed seasonal periodicity, with lower concentrations observed in winter. Cord blood cadmium concentrations over 0.29 μg/L were associated with lower 1-minute and 5-minute Apgar scores. Conclusions These results reinforce the need to establish biomonitoring programs in Spain, and provide support for tobacco smoke and fish consumption as important preventable sources of heavy metal exposure in newborns. Additionally, our findings support the hypothesis that cadmium exposure might be deleterious to fetal development.
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Affiliation(s)
- Esther García-Esquinas
- Environmental and Cancer Epidemiology Unit, National Centre for Epidemiology, Carlos III Institute of Health (Instituto de Salud Carlos III - ISCIII), Madrid, Spain.
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Taylor CM, Golding J, Hibbeln J, Emond AM. Environmental factors predicting blood lead levels in pregnant women in the UK: the ALSPAC study. PLoS One 2013; 8:e72371. [PMID: 24039753 PMCID: PMC3764234 DOI: 10.1371/journal.pone.0072371] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2013] [Accepted: 07/08/2013] [Indexed: 11/24/2022] Open
Abstract
Background Lead is a widespread environmental toxin. The behaviour and academic performance of children can be adversely affected even at low blood lead levels (BLL) of 5–10 µg/dl. An important contribution to the infant's lead load is provided by maternal transfer during pregnancy. Objectives Our aim was to determine BLL in a large cohort of pregnant women in the UK and to identify the factors that contribute to BLL in pregnant women. Methods Pregnant women resident in the Avon area of the UK were enrolled in the Avon Longitudinal Study of Parents and Children (ALSPAC) in 1991–1992. Whole blood samples were collected at median gestational age of 11 weeks and analysed by inductively coupled plasma dynamic reaction cell mass spectrometry (n = 4285). Self-completion postal questionnaires were used to collect data during pregnancy on lifestyle, diet and other environmental exposures. Statistical analysis was carried out with SPSS v19. Results The mean±SD BLL was 3.67±1.47 (median 3.41, range 0.41–19.14) µg/dl. Higher educational qualification was found to be one of the strongest independent predictor of BLL in an adjusted backwards stepwise logistic regression to predict maternal BLL <5 or ≥5 µg/dl (odds ratio 1.26, 95% confidence interval 1.12–1.42; p<0.001). Other predictive factors included cigarette smoking, alcohol and coffee drinking, and heating the home with a coal fire, with some evidence for iron and calcium intake having protective effects. Conclusion The mean BLL in this group of pregnant women is higher than has been found in similar populations in developed countries. The finding that high education attainment was independently associated with higher BLL was unexpected and currently unexplained. Reduction in maternal lead levels can best be undertaken by reducing intake of the social drugs cigarettes, alcohol and caffeine, although further investigation of the effect of calcium on lead levels is needed.
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Affiliation(s)
- Caroline M. Taylor
- Centre for Child and Adolescent Health, School of Social and Community Medicine, University of Bristol, Bristol, United Kingdom
- * E-mail:
| | - Jean Golding
- Centre for Child and Adolescent Health, School of Social and Community Medicine, University of Bristol, Bristol, United Kingdom
| | - Joseph Hibbeln
- NIAAA, National Institutes of Health, Rockville, Maryland, United States of America
| | - Alan M. Emond
- Centre for Child and Adolescent Health, School of Social and Community Medicine, University of Bristol, Bristol, United Kingdom
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Liddelow SA, Dziegielewska KM, Ek CJ, Habgood MD, Bauer H, Bauer HC, Lindsay H, Wakefield MJ, Strazielle N, Kratzer I, Møllgård K, Ghersi-Egea JF, Saunders NR. Mechanisms that determine the internal environment of the developing brain: a transcriptomic, functional and ultrastructural approach. PLoS One 2013; 8:e65629. [PMID: 23843944 PMCID: PMC3699566 DOI: 10.1371/journal.pone.0065629] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2013] [Accepted: 04/25/2013] [Indexed: 01/04/2023] Open
Abstract
We provide comprehensive identification of embryonic (E15) and adult rat lateral ventricular choroid plexus transcriptome, with focus on junction-associated proteins, ionic influx transporters and channels. Additionally, these data are related to new structural and previously published permeability studies. Results reveal that most genes associated with intercellular junctions are expressed at similar levels at both ages. In total, 32 molecules known to be associated with brain barrier interfaces were identified. Nine claudins showed unaltered expression, while two claudins (6 and 8) were expressed at higher levels in the embryo. Expression levels for most cytoplasmic/regulatory adaptors (10 of 12) were similar at the two ages. A few junctional genes displayed lower expression in embryos, including 5 claudins, occludin and one junctional adhesion molecule. Three gap junction genes were enriched in the embryo. The functional effectiveness of these junctions was assessed using blood-delivered water-soluble tracers at both the light and electron microscopic level: embryo and adult junctions halted movement of both 286Da and 3kDa molecules into the cerebrospinal fluid (CSF). The molecular identities of many ion channel and transporter genes previously reported as important for CSF formation and secretion in the adult were demonstrated in the embryonic choroid plexus (and validated with immunohistochemistry of protein products), but with some major age-related differences in expression. In addition, a large number of previously unidentified ion channel and transporter genes were identified for the first time in plexus epithelium. These results, in addition to data obtained from electron microscopical and physiological permeability experiments in immature brains, indicate that exchange between blood and CSF is mainly transcellular, as well-formed tight junctions restrict movement of small water-soluble molecules from early in development. These data strongly indicate the brain develops within a well-protected internal environment and the exchange between the blood, brain and CSF is transcellular and not through incomplete barriers.
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Affiliation(s)
- Shane A Liddelow
- Department of Pharmacology, the University of Melbourne, Victoria, Australia.
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Xie X, Ding G, Cui C, Chen L, Gao Y, Zhou Y, Shi R, Tian Y. The effects of low-level prenatal lead exposure on birth outcomes. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2013; 175:30-4. [PMID: 23321271 DOI: 10.1016/j.envpol.2012.12.013] [Citation(s) in RCA: 90] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2012] [Revised: 12/10/2012] [Accepted: 12/14/2012] [Indexed: 05/02/2023]
Abstract
Exposure to lead early in life may be a risk factor for fetal growth, but little is known about the effects of low-level prenatal lead exposure on birth outcomes. We measured maternal and cord blood lead levels and examined their associations with birth outcomes. Mother-infant pairs (n = 252) were recruited from a rural area located on the south coast of Laizhou Bay between 2010 and 2011. The median levels of maternal and cord blood lead were 3.20 and 2.52 μg/dL, respectively. Increasing maternal blood lead exposure was associated with decreasing birth weight (β = -148.99; 95% CI, -286.33 to -11.66), and a significant negative relationship was found between cord blood lead levels and birth length (β = -0.84; 95% CI, -1.52 to -0.16). Low-level prenatal lead exposure may adversely affect fetal growth. These results may be important for public health and have implications regarding the recommended blood lead levels.
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Affiliation(s)
- Xin Xie
- Department of Environmental Health, School of Public Health, Shanghai Jiao Tong University School of Medicine, 280 South Chongqing Road, Shanghai 200025, China
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Estudio de la evolución de la exposición a plomo en la población infantil española en los últimos 20 años. ¿Un ejemplo no reconocido de «salud en todas las políticas»? GACETA SANITARIA 2013; 27:149-55. [DOI: 10.1016/j.gaceta.2012.01.019] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2011] [Revised: 01/30/2012] [Accepted: 01/31/2012] [Indexed: 11/20/2022]
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Amaya E, Gil F, Freire C, Olmedo P, Fernández-Rodríguez M, Fernández MF, Olea N. Placental concentrations of heavy metals in a mother-child cohort. ENVIRONMENTAL RESEARCH 2013; 120:63-70. [PMID: 23140988 DOI: 10.1016/j.envres.2012.09.009] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2012] [Revised: 09/12/2012] [Accepted: 09/27/2012] [Indexed: 06/01/2023]
Abstract
Heavy metals are environmental contaminants with properties known to be toxic for wildlife and humans. Despite strong concerns about their harmful effects, little information is available on intrauterine exposure in humans. The aim of this study was to evaluate prenatal exposure to As, Cd, Cr, Hg, Mn, and Pb and its association with maternal factors in a population-based mother-child cohort in Southern Spain. Between 2000 and 2002, 700 pregnant women were recruited and 137 placentas from the cohort were randomly selected and analyzed for the selected metals by atomic absorption. Maternal sociodemographic and lifestyle factors were obtained by questionnaire after delivery. Bivariate analysis and multivariate linear regression were performed. Cd and Mn concentrations were detected in all placentas, while Cr, Pb, and Hg were found in 98.5%, 35.0%, and 30.7% of samples, respectively. The highest concentrations were observed for Pb (mean: 94.80 ng/g wet weight of placenta), followed by Mn (63.80 ng/g), Cr (63.70 ng/g), Cd (3.45 ng/g), and Hg (0.024 ng/g). Arsenic was not detected in any sample. Gestational age and smoking during pregnancy were associated with placental Cd concentrations, while no factor appeared to influence concentrations of Cr, Hg, Mn, or Pb. In comparison to results of European studies, these concentrations are in a low-intermediate position. Studies are required to investigate the factors contributing to early exposure to heavy metals and to determine how placental transfer of these toxic compounds may affect children's health.
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Affiliation(s)
- E Amaya
- Laboratory of Medical Investigations, San Cecilio University Hospital, University of Granada, 18071 Granada, Spain.
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Alba A, Carleton L, Dinkel L, Ruppe R. Increased Lead Levels in Pregnancy Among Immigrant Women. J Midwifery Womens Health 2012; 57:509-14. [DOI: 10.1111/j.1542-2011.2012.00166.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Bas P, Luzardo OP, Peña-Quintana L, González JE, Peña JA, Gracia J, Zumbado M, Boada LD. Determinants of blood lead levels in children: A cross-sectional study in the Canary Islands (Spain). Int J Hyg Environ Health 2012; 215:383-8. [DOI: 10.1016/j.ijheh.2011.10.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2011] [Revised: 09/14/2011] [Accepted: 10/23/2011] [Indexed: 11/30/2022]
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Zhang WH, Dewolf MC, Hammadi S, Fris W, Noël E, Lorenzo R, Alexander S. Lead levels in umbilical cord blood in Belgium: A cross-sectional study in five maternity units. Int J Hyg Environ Health 2012; 215:202-5. [DOI: 10.1016/j.ijheh.2011.09.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2011] [Revised: 06/13/2011] [Accepted: 09/02/2011] [Indexed: 01/23/2023]
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Guxens M, Aguilera I, Ballester F, Estarlich M, Fernández-Somoano A, Lertxundi A, Lertxundi N, Mendez MA, Tardón A, Vrijheid M, Sunyer J. Prenatal exposure to residential air pollution and infant mental development: modulation by antioxidants and detoxification factors. ENVIRONMENTAL HEALTH PERSPECTIVES 2012; 120:144-9. [PMID: 21868304 PMCID: PMC3261939 DOI: 10.1289/ehp.1103469] [Citation(s) in RCA: 108] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2011] [Accepted: 08/25/2011] [Indexed: 05/02/2023]
Abstract
BACKGROUND Air pollution effects on children's neurodevelopment have recently been suggested to occur most likely through the oxidative stress pathway. OBJECTIVE We aimed to assess whether prenatal exposure to residential air pollution is associated with impaired infant mental development, and whether antioxidant/detoxification factors modulate this association. METHODS In the Spanish INfancia y Medio Ambiente (INMA; Environment and Childhood) Project, 2,644 pregnant women were recruited during their first trimester. Nitrogen dioxide (NO2) and benzene were measured with passive samplers covering the study areas. Land use regression models were developed for each pollutant to predict average outdoor air pollution levels for the entire pregnancy at each residential address. Maternal diet was obtained at first trimester through a validated food frequency questionnaire. Around 14 months, infant mental development was assessed using Bayley Scales of Infant Development. RESULTS Among the 1,889 children included in the analysis, mean exposure during pregnancy was 29.0 μg/m3 for NO2 and 1.5 μg/m3 for benzene. Exposure to NO2 and benzene showed an inverse association with mental development, although not statistically significant, after adjusting for potential confounders [β (95% confidence interval) = -0.95 (-3.90, 1.89) and -1.57 (-3.69, 0.56), respectively, for a doubling of each compound]. Stronger inverse associations were estimated for both pollutants among infants whose mothers reported low intakes of fruits/vegetables during pregnancy [-4.13 (-7.06, -1.21) and -4.37 (-6.89, -1.86) for NO2 and benzene, respectively], with little evidence of associations in the high-intake group (interaction p-values of 0.073 and 0.047). Inverse associations were also stronger in non-breast-fed infants and infants with low maternal vitamin D, but effect estimates and interactions were not significant. CONCLUSIONS Our findings suggest that prenatal exposure to residential air pollutants may adversely affect infant mental development, but potential effects may be limited to infants whose mothers report low antioxidant intakes.
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Affiliation(s)
- Mònica Guxens
- Center for Research in Environmental Epidemiology, Carrer Dr. Aiguader 88, Barcelona, Catalonia, Spain.
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