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Venkatesan D, Muthukumar S, Iyer M, Babu HWS, Gopalakrishnan AV, Yadav MK, Vellingiri B. Heavy metals toxicity on epigenetic modifications in the pathogenesis of Alzheimer's disease (AD). J Biochem Mol Toxicol 2024; 38:e23741. [PMID: 38816991 DOI: 10.1002/jbt.23741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Revised: 03/09/2024] [Accepted: 05/09/2024] [Indexed: 06/01/2024]
Abstract
Alzheimer's disease (AD) is a progressive decline in cognitive ability and behavior which eventually disrupts daily activities. AD has no cure and the progression rate varies unlikely. Among various causative factors, heavy metals are reported to be a significant hazard in AD pathogenesis. Metal-induced neurodegeneration has been focused globally with thorough research to unravel the mechanistic insights in AD. Recently, heavy metals suggested to play an important role in epigenetic alterations which might provide evidential results on AD pathology. Epigenetic modifications are known to play towards novel therapeutic approaches in treating AD. Though many studies focus on epigenetics and heavy metal implications in AD, there is a lack of research on heavy metal influence on epigenetic toxicity in neurological disorders. The current review aims to elucidate the plausible role of cadmium (Cd), iron (Fe), arsenic (As), copper (Cu), and lithium (Li) metals on epigenetic factors and the increase in amyloid beta and tau phosphorylation in AD. Also, the review discusses the common methods of heavy metal detection to implicate in AD pathogenesis. Hence, from this review, we can extend the need for future research on identifying the mechanistic behavior of heavy metals on epigenetic toxicity and to develop diagnostic and therapeutic markers in AD.
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Affiliation(s)
- Dhivya Venkatesan
- Centre for Neuroscience, Department of Biotechnology, Karpagam Academy of Higher Education (Deemed to be University), Coimbatore, India
| | - Sindduja Muthukumar
- Human Cytogenetics and Stem Cell Laboratory, Department of Zoology, School of Basic Sciences, Central University of Punjab, Bathinda, Punjab, India
| | - Mahalaxmi Iyer
- Centre for Neuroscience, Department of Biotechnology, Karpagam Academy of Higher Education (Deemed to be University), Coimbatore, India
- Department of Microbiology, School of Basic Sciences, Central University of Punjab, Bathinda, Punjab, India
| | - Harysh Winster Suresh Babu
- Human Cytogenetics and Stem Cell Laboratory, Department of Zoology, School of Basic Sciences, Central University of Punjab, Bathinda, Punjab, India
| | - Abilash Valsala Gopalakrishnan
- Department of Biomedical Sciences, School of Biosciences and Technology, Vellore Institute of Technology, Vellore, India
| | - Mukesh Kumar Yadav
- Department of Microbiology, School of Basic Sciences, Central University of Punjab, Bathinda, Punjab, India
| | - Balachandar Vellingiri
- Human Cytogenetics and Stem Cell Laboratory, Department of Zoology, School of Basic Sciences, Central University of Punjab, Bathinda, Punjab, India
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Zhang B, Wang Z, Zhang J, Dai Y, Ding J, Guo J, Qi X, Wu C, Zhou Z. Prenatal exposure to per- and polyfluoroalkyl substances, fetal thyroid function, and intelligence quotient at 7 years of age: Findings from the Sheyang Mini Birth Cohort Study. ENVIRONMENT INTERNATIONAL 2024; 187:108720. [PMID: 38718676 DOI: 10.1016/j.envint.2024.108720] [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: 12/04/2023] [Revised: 04/24/2024] [Accepted: 05/03/2024] [Indexed: 05/19/2024]
Abstract
BACKGROUND Prenatal exposure to per- and polyfluoroalkyl substances (PFASs) influences neurodevelopment. Thyroid homeostasis disruption is thought to be a possible underlying mechanism. However, current epidemiological evidence remains inconclusive. OBJECTIVES This study aimed to explore the effects of prenatal PFAS exposure on the intelligence quotient (IQ) of school-aged children and assess the potential mediating role of fetal thyroid function. METHODS The study included 327 7-year-old children from the Sheyang Mini Birth Cohort Study (SMBCS). Cord serum samples were analyzed for 12 PFAS concentrations and 5 thyroid hormone (TH) levels. IQ was assessed using the Wechsler Intelligence Scale for Children-Chinese Revised (WISC-CR). Generalized linear models (GLM) and Bayesian Kernel Machine Regression (BKMR) were used to evaluate the individual and combined effects of prenatal PFAS exposure on IQ. Additionally, the impact on fetal thyroid function was examined using a GLM, and a mediation analysis was conducted to explore the potential mediating roles of this function. RESULTS The molar sum concentration of perfluorinated carboxylic acids (ΣPFCA) in cord serum was significantly negatively associated with the performance IQ (PIQ) of 7-year-old children (β = -6.21, 95 % confidence interval [CI]: -12.21, -0.21), with more pronounced associations observed among girls (β = -9.57, 95 % CI: -18.33, -0.81) than in boys. Negative, albeit non-significant, cumulative effects were noted when considering PFAS mixture exposure. Prenatal exposure to perfluorooctanoic acid, perfluorononanoic acid, and perfluorooctanesulfonic acid was positively associated with the total thyroxine/triiodothyronine ratio. However, no evidence supported the mediating role of thyroid function in the link between PFAS exposure and IQ. CONCLUSIONS Increased prenatal exposure to PFASs negatively affected the IQ of school-aged children, whereas fetal thyroid function did not serve as a mediator in this relationship.
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Affiliation(s)
- Boya Zhang
- School of Public Health/MOE Key Laboratory of Public Health Safety, Fudan University, No.130 Dong'an Road, Shanghai 200032, China
| | - Zheng Wang
- School of Public Health/MOE Key Laboratory of Public Health Safety, Fudan University, No.130 Dong'an Road, Shanghai 200032, China
| | - Jiming Zhang
- School of Public Health/MOE Key Laboratory of Public Health Safety, Fudan University, No.130 Dong'an Road, Shanghai 200032, China.
| | - Yiming Dai
- School of Public Health/MOE Key Laboratory of Public Health Safety, Fudan University, No.130 Dong'an Road, Shanghai 200032, China
| | - Jiayun Ding
- School of Public Health/MOE Key Laboratory of Public Health Safety, Fudan University, No.130 Dong'an Road, Shanghai 200032, China
| | - Jianqiu Guo
- School of Public Health/MOE Key Laboratory of Public Health Safety, Fudan University, No.130 Dong'an Road, Shanghai 200032, China
| | - Xiaojuan Qi
- School of Public Health/MOE Key Laboratory of Public Health Safety, Fudan University, No.130 Dong'an Road, Shanghai 200032, China; Zhejiang Provincial Center for Disease Control and Prevention, No. 3399 Binsheng Road, Hangzhou 310051, China
| | - Chunhua Wu
- School of Public Health/MOE Key Laboratory of Public Health Safety, Fudan University, No.130 Dong'an Road, Shanghai 200032, China
| | - Zhijun Zhou
- School of Public Health/MOE Key Laboratory of Public Health Safety, Fudan University, No.130 Dong'an Road, Shanghai 200032, China.
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Liu H, Wan X, Yao L, Zhao Q, Yang Y, Liu H, Shang J, Zeng F, Wang X, Huang S. Differentially expressed long non-coding RNAs and mRNAs of cadmium exposure on learning disability of offspring rats. Eur J Med Res 2024; 29:82. [PMID: 38287418 PMCID: PMC10823636 DOI: 10.1186/s40001-024-01663-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Accepted: 01/11/2024] [Indexed: 01/31/2024] Open
Abstract
BACKGROUND Cadmium (Cd) exposure has been found to have detrimental effects on the development of the central nervous system and cognitive ability in children. However, there is ongoing debate regarding the impact of maternal Cd exposure on the cognitive ability of offspring. In this study, we aimed to investigate the mechanisms underlying the influence of maternal Cd exposure on the cognitive ability of offspring rats. METHODS Here, we constructed a model of cadmium poisoning in first-generation rats through gavage. The cognitive and memory abilities of its offspring were evaluated by water maze experiment. Then, we used the gene chip to find out the key genes, and we performed qRT-PCR detection of these genes. Subsequently, enrichment analysis was employed to identify pathways. Finally, we constructed a co-expression network consisting of LncRNAs and mRNAs to elucidate the biological functions and regulatory mechanisms of LncRNAs. RESULTS The results of the water maze trial demonstrated that the offspring of rats exposed to cadmium in the first generation had reduced cognitive and memory abilities. Through an analysis of gene expression in the hippocampus of the cadmium-treated rats' offspring and the control group, we identified a correlation between the islet secretion pathway and the cognitive impairment observed in the offspring. Utilizing various algorithms, we identified Cpa1 and Prss1 as potential key genes associated with the cognitive impairment caused by cadmium. The results of qRT-PCR demonstrated a decrease in the expression levels of these genes in the hippocampus of the cadmium-treated rats' offspring. In addition, in the co-expression network, we observed that Cpa1 was co-expressed with 11 LncRNAs, while Prss1 was associated with 4 unexplored LncRNAs. Furthermore, we conducted an analysis to examine the relationship between Cpa1, Prss1-related transcription factors, and LncRNAs. CONCLUSION Overall, this study provides novel insights into the molecular effects of first generation Cd exposure on the cognitive ability of offspring. The target genes and signaling pathways investigated in this study could serve as potential targets for improving neurodevelopment and cognitive ability in children.
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Affiliation(s)
- Hui Liu
- School of Nursing, Jiujiang University, Jiujiang, 332000, China
| | - Xichen Wan
- School of Medicine, Jiujiang University, Jiujiang, 332000, China
- Department of Neurosurgery, The First Affiliated Hospital of Nanchang University, Nanchang, 330000, China
| | - Liyun Yao
- SpecAlly Life Technology Co., Ltd., Wuhan, 430070, China
| | - Qihan Zhao
- School of Medicine, Jiujiang University, Jiujiang, 332000, China
| | - Yong Yang
- SpecAlly Life Technology Co., Ltd., Wuhan, 430070, China
| | - Hongtao Liu
- SpecAlly Life Technology Co., Ltd., Wuhan, 430070, China
| | - Jun Shang
- SpecAlly Life Technology Co., Ltd., Wuhan, 430070, China
- Wuhan Institute of Biotechnology, Wuhan, 430070, China
| | - Fanfan Zeng
- School of Medicine, Jiujiang University, Jiujiang, 332000, China
| | - Xin Wang
- School of Medicine, Jiujiang University, Jiujiang, 332000, China
| | - Shaoxin Huang
- School of Nursing, Jiujiang University, Jiujiang, 332000, China.
- School of Medicine, Jiujiang University, Jiujiang, 332000, China.
- SpecAlly Life Technology Co., Ltd., Wuhan, 430070, China.
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Xu G, Hao F, Zhao W, Zhao P, Qiu J. Long-term psychological intervention for parents of children with prolonged disorders of consciousness: a pilot study. Front Psychol 2023; 14:1212014. [PMID: 38098536 PMCID: PMC10720583 DOI: 10.3389/fpsyg.2023.1212014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Accepted: 11/06/2023] [Indexed: 12/17/2023] Open
Abstract
Background Children with prolonged disorders of consciousness experience severe intellectual and behavioral disabilities that will last for decades or even a lifetime. Parents generally experience severe anxiety, stress, sadness, or family conflicts, which can lead to abnormal parenting behavior and can, in turn, adversely affect the cognitive, emotional, and behavioral well-being of the children. This causes a serious burden on children, families, and society. Psychological interventions targeting parents using online conversations provide an opportunity to improve the overall well-being of the parents, their children, and the family as a whole. Methods A total of 13 patients completed the protocol. Six were girls (46.2%), the mean age was 4.5 ± 3.0 years, and the length of time before emergent from minimally consciousness state was 244 ± 235 days. A staff member with psychological counseling qualifications implemented all psychological interventions. Regular online psychological interventions were performed annually before and after discharge. Evaluation data were collected before discharge and at 1 and 3-5 years post-discharge. Results With the extension of intervention time, the Strengths and Difficulties Questionnaire, the Depression Anxiety and Stress Scale-21, and the Parenting Sense of Competence Scale scores showed significant improvement (p < 0.05), while the Revised Scale for Caregiving Self-Efficacy scores did not. With the extension of intervention time, the Strengths and Difficulties Questionnaire (Total Difficulties scores, TD) scores showed significant improvement (p < 0.05), while the scores did not after 1 year compared with before intervention. The Index of Child Care Environment evaluation scores declined significantly (p < 0.05). Conclusion Psychological interventions aimed at the parents of children with prolonged disorders of consciousness performed at least once per year resulted in significant improvements in negative parental emotions, parental self-efficacy, and emotional and behavioral problems in their children. However, the childcare environment continued to decline.
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Affiliation(s)
- Gang Xu
- Rehabilitation Branch, Tianjin Children’s Hospital/Children’s Hospital, Tianjin University, Tianjin, China
- Tianjin Key Laboratory of Birth Defects for Prevention and Treatment, Tianjin Children’s Hospital/Children’s Hospital, Tianjin University, Tianjin, China
| | | | - Weiwei Zhao
- Tianjin Beichen Experimental Middle School, Tianjin, China
| | - Peng Zhao
- Rehabilitation Branch, Tianjin Children’s Hospital/Children’s Hospital, Tianjin University, Tianjin, China
- Tianjin Key Laboratory of Birth Defects for Prevention and Treatment, Tianjin Children’s Hospital/Children’s Hospital, Tianjin University, Tianjin, China
| | - Jiwen Qiu
- Research Center of Experimental Acupuncture Science, Tianjin University of Traditional Chinese Medicine, Tianjin, China
- School of Medical Technology, Tianjin University of Traditional Chinese Medicine, Tianjin, China
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Dai Y, Lu H, Zhang J, Ding J, Wang Z, Zhang B, Qi X, Chang X, Wu C, Zhou Z. Sex-specific associations of maternal and childhood urinary arsenic levels with emotional problems among 6-year-age children: Evidence from a longitudinal cohort study in China. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 267:115658. [PMID: 37925797 DOI: 10.1016/j.ecoenv.2023.115658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 10/28/2023] [Accepted: 10/30/2023] [Indexed: 11/07/2023]
Abstract
BACKGROUND Arsenic exposure has been linked to neurobehavior development disorders among children in cross-sectional studies, but there is little information on the effects of prenatal and childhood arsenic exposure on childhood behavior problem, especially emotional problems. OBJECTIVE To explore the relationship between prenatal and childhood arsenic exposure and behavior problems among six-year-old children. METHODS 389 mother-child pairs from a longitudinal birth cohort were enrolled in the study. The concentrations of arsenic in maternal and 6-year-old children's urine were measured using inductively coupled plasma mass spectrometry (ICP-MS). Neurobehavioral development in 6-year-old children was assessed by Child Behavior Checklist (CBCL). Generalized linear regression models were used to relate arsenic exposure to the score of different domains in CBCL. RESULTS The median concentrations of maternal and 6-year-old children's urinary arsenic were 22.22 and 33.86 μg/L, respectively. After adjusting for potential covariates, natural logarithm transformed concurrent urinary arsenic levels were significantly associated with scores of anxious and depressed problems in 6-year-old girls (β = 0.71, 95% CI: 0.12-1.31, p = 0.018). Furthermore, in terms of the trajectory of arsenic exposure, compared with the "consistently low" group, the "low to high" group (β = 2.73, 95% CI: -3.99 to 9.45, p = 0.425) had a greater effect on total score of CBCL than "high to low" group (β = -0.93, 95% CI: -7.22 to 5.36, p = 0.771) in girls, although insignificant. CONCLUSIONS Our results suggested that concurrent arsenic exposure might have an adverse effect of emotional status in girls. Further studies are needed to verify the findings and explore the mechanisms of the sex-specific association.
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Affiliation(s)
- Yiming Dai
- Key Laboratory of Public Health Safety of Ministry of Education, Key Laboratory of Health Technology Assessment of National Health Commission, School of Public Health, Fudan University, No.130 Dong'an Road, Shanghai 200032, China
| | - Hanyu Lu
- Key Laboratory of Public Health Safety of Ministry of Education, Key Laboratory of Health Technology Assessment of National Health Commission, School of Public Health, Fudan University, No.130 Dong'an Road, Shanghai 200032, China
| | - Jiming Zhang
- Key Laboratory of Public Health Safety of Ministry of Education, Key Laboratory of Health Technology Assessment of National Health Commission, School of Public Health, Fudan University, No.130 Dong'an Road, Shanghai 200032, China.
| | - Jiayun Ding
- Key Laboratory of Public Health Safety of Ministry of Education, Key Laboratory of Health Technology Assessment of National Health Commission, School of Public Health, Fudan University, No.130 Dong'an Road, Shanghai 200032, China
| | - Zheng Wang
- Key Laboratory of Public Health Safety of Ministry of Education, Key Laboratory of Health Technology Assessment of National Health Commission, School of Public Health, Fudan University, No.130 Dong'an Road, Shanghai 200032, China
| | - Boya Zhang
- Key Laboratory of Public Health Safety of Ministry of Education, Key Laboratory of Health Technology Assessment of National Health Commission, School of Public Health, Fudan University, No.130 Dong'an Road, Shanghai 200032, China
| | - Xiaojuan Qi
- Key Laboratory of Public Health Safety of Ministry of Education, Key Laboratory of Health Technology Assessment of National Health Commission, School of Public Health, Fudan University, No.130 Dong'an Road, Shanghai 200032, China; Zhejiang Provincial Center for Disease Control and Prevention, No. 3399 Binsheng Road, Hangzhou 310051, China
| | - Xiuli Chang
- Key Laboratory of Public Health Safety of Ministry of Education, Key Laboratory of Health Technology Assessment of National Health Commission, School of Public Health, Fudan University, No.130 Dong'an Road, Shanghai 200032, China
| | - Chunhua Wu
- Key Laboratory of Public Health Safety of Ministry of Education, Key Laboratory of Health Technology Assessment of National Health Commission, School of Public Health, Fudan University, No.130 Dong'an Road, Shanghai 200032, China
| | - Zhijun Zhou
- Key Laboratory of Public Health Safety of Ministry of Education, Key Laboratory of Health Technology Assessment of National Health Commission, School of Public Health, Fudan University, No.130 Dong'an Road, Shanghai 200032, China.
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Lane JM, Curtin P, Chelonis JJ, Pantic I, Martinez-Medina S, Téllez-Rojo MM, Wright RO. Prenatal manganese biomarkers and operant test battery performance in Mexican children: Effect modification by child sex. ENVIRONMENTAL RESEARCH 2023; 236:116880. [PMID: 37574101 PMCID: PMC10919280 DOI: 10.1016/j.envres.2023.116880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Revised: 08/10/2023] [Accepted: 08/11/2023] [Indexed: 08/15/2023]
Abstract
BACKGROUND Manganese (Mn) is essential to healthy neurodevelopment, but both Mn deficiency and over-exposure have been linked to prefrontal cortex (PFC) impairments, the brain region that regulates cognitive and neurobehavioral processes responsible for spatial memory, learning, motivation, and time perception. These processes facilitated by attention, inhibitory control, working memory, and cognitive flexibility are often sexually dimorphic and complex, driven by multiple interconnected neurologic and cognitive domains. OBJECTIVE We investigated the role of child sex as an effect modifier of the association between prenatal Mn exposure and performance in an operant testing battery (OTB) that assessed multiple cognitive and behavioral functional domains. METHODS Children (N = 575) aged 6-8 years completed five OTB tasks. Blood and urinary Mn measurements were collected from mothers in the 2nd and 3rd trimesters. Multiple regression models estimated the association between Mn biomarkers at each trimester with OTB performance while adjusting for socio-demographic covariates. Covariate-adjusted weighted quantile sum (WQS) regression models were used to estimate the association of a Mn multi-media biomarker (MMB) mixture with OTB performance. Interaction terms were used to estimate modification effect by child sex. RESULTS Higher blood Mn exposure was associated with better response rates (more motivation) on the progressive ratio task and higher overall accuracy on the delayed matching-to-sample task. In the WQS models, the MMB mixture was associated with better response rates (more motivation) on the progressive ratio task. Additionally, for the linear and WQS models, we observed a modification effect by child sex in the progressive ratio and delayed matching-to-sample tasks. Higher prenatal Mn biomarker levels were associated with improved task performance for girls and reduced performance in boys. CONCLUSION Higher prenatal blood Mn concentrations and the MMB mixture predicted improved performance on two of five operant tasks. Higher prenatal Mn concentrations regulated executive functions in children in a sexually dimorphic manner. Higher prenatal Mn exposure is associated with improved performance on spatial memory and motivation tasks in girls, suggesting that Mn's nutritional role is sexually dimorphic, and should be considered when making dietary and/or environmental intervention recommendations.
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Affiliation(s)
- Jamil M Lane
- Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
| | - Paul Curtin
- Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - John J Chelonis
- Division of Neurotoxicology, National Center for Toxicological Research, FDA, Jefferson, AR, USA
| | - Ivan Pantic
- Division of Community Interventions Research, National Institute of Perinatology, Mexico City, Mexico
| | - Sandra Martinez-Medina
- Division of Community Interventions Research, National Institute of Perinatology, Mexico City, Mexico
| | - Martha M Téllez-Rojo
- Center for Nutrition and Health Research, National Institute of Public Health, Cuernavaca, Morelos, Mexico
| | - Robert O Wright
- Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA; Institute for Exposomic Research, Icahn School of Medicine at Mount Sinai, USA
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Lane JM, Liu SH, Pantic I, Martinez-Medina S, Téllez-Rojo MM, Amarasiriwardena C, Wright RO. Sex-specific association between prenatal manganese exposure and working memory in school-aged children in Mexico city: An exploratory multi-media approach. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 333:121965. [PMID: 37286025 PMCID: PMC10527609 DOI: 10.1016/j.envpol.2023.121965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 05/11/2023] [Accepted: 06/04/2023] [Indexed: 06/09/2023]
Abstract
It remains unclear whether manganese (Mn) exposure affects working memory (WM) in a sexually dimorphic manner. Further, no gold standard media exists to measure Mn, suggesting a combined blood and urinary Mn index may better capture the totality of exposure. We investigated the modification effect of child sex on the influence of prenatal Mn exposure on WM in school-age children, exploring two methodological frameworks to integrate exposure estimates across multiple exposure biomarkers. Leveraging the PROGRESS birth cohort in Mexico City, children (N = 559) ages 6-8 completed the between errors and strategy measures of the CANTAB Spatial Working Memory (SWM) task. Mn levels were assayed in blood and urine of mothers during the 2nd and 3rd trimesters and in umbilical cord blood from mothers and children at delivery. Weighted quantile sum regression estimated the association of a multi-media biomarker (MMB) mixture with SWM. We applied a confirmatory factor analysis to similarly quantify a latent blood Mn burden index. We then used an adjusted linear regression to estimate the Mn burden index with SWM measures. Interaction terms were used to estimate the modification effect by child sex for all models. Results showed that the between-errors-specific MMB mixture (i.e., this model demonstrates the impact of the MMB mixture on the between-error scores.) was associated (β = 6.50, 95% CI: 0.91, 12.08) with fewer between errors for boys and more between errors for girls. The strategy-specific MMB mixture (i.e., this model demonstrates the impact of the MMB mixture on the strategy scores) was associated (β = -1.36, 95% CI: 2.55, - 0.18) with less efficient strategy performance for boys and more efficient strategy performance for girls. A higher Mn burden index was associated (β = 0.86, 95% CI: 0.00, 1.72) with more between errors in the overall sample. The vulnerability to prenatal Mn biomarkers on SWM differs in the directionality by child sex. An MMB mixture and composite index of body burden are stronger predictors than a single biomarker for Mn exposure on WM performance.
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Affiliation(s)
- Jamil M Lane
- Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
| | - Shelley H Liu
- Department of Population Health Science and Policy, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Ivan Pantic
- Division of Community Interventions Research, National Institute of Perinatology, Mexico City, Mexico
| | - Sandra Martinez-Medina
- Division of Community Interventions Research, National Institute of Perinatology, Mexico City, Mexico
| | - Martha M Téllez-Rojo
- Center for Nutrition and Health Research, National Institute of Public Health, Cuernavaca, Morelos, Mexico
| | - Chitra Amarasiriwardena
- Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA; Institute for Exposomic Research, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Robert O Wright
- Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA; Institute for Exposomic Research, Icahn School of Medicine at Mount Sinai, New York, NY, USA
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Saati AA, Adly HM. Assessing the Correlation between Blood Trace Element Concentrations, Picky Eating Habits, and Intelligence Quotient in School-Aged Children. CHILDREN (BASEL, SWITZERLAND) 2023; 10:1249. [PMID: 37508746 PMCID: PMC10378148 DOI: 10.3390/children10071249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2023] [Revised: 07/14/2023] [Accepted: 07/19/2023] [Indexed: 07/30/2023]
Abstract
INTRODUCTION Inadequate levels of iron, zinc, and copper have been linked to growth impairment and cognitive and motor development deficits. The objective of this study is to examine the deficiencies of trace elements and their correlation with selective eating patterns and the intelligence quotient (IQ) of children. METHODS AND PATIENTS The cross-sectional analysis involved 430 children aged between 7 and 10 years. Blood samples were analyzed using Inductively Coupled Plasma Mass Spectrometry (ICP-MS) to measure the trace elements levels. Children's IQs were assessed using Raven's Standard Progressive Matrices. RESULTS Among the sample group, 20.3% exhibited iron deficiency, 42.5% had zinc deficiency, and 14% had insufficient copper levels. Single trace element deficiency was observed in 56.9% of the children, while 66.7% showed coexisting deficiencies of iron and zinc. Children with lower development levels exhibited significantly lower serum zinc levels compared to those with higher development levels (76.78 ± 10.67 vs. 81.14 ± 10.19 μg/dL). The analysis reveals that picky eaters had lower serum iron levels (76.59 ± 10.42 μg/dL) and higher serum copper levels (123.74 ± 13.45 μg/dL). CONCLUSION A strong association was observed between zinc deficiency, picky eating habits, and lower developmental stages. The findings underscore the importance of monitoring nutritional status in children, given the significant implications for their cognitive development.
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Affiliation(s)
- Abdullah A Saati
- Community Medicine and Pilgrims Healthcare Department, Faculty of Medicine, Umm Al-Qura University, Makkah 21955, Saudi Arabia
| | - Heba M Adly
- Community Medicine and Pilgrims Healthcare Department, Faculty of Medicine, Umm Al-Qura University, Makkah 21955, Saudi Arabia
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Qing Y, Zheng J, Tang T, Li S, Cao S, Luo Y, Chen Y, He W, Wang J, Zhou Y, Xu C, Zhang W, Ping S, Jiang M, Li D, Ji Y, Yang S, Du J, Li Y. Risk assessment of combined exposure to lead, cadmium, and total mercury among the elderly in Shanghai, China. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 256:114874. [PMID: 37054469 DOI: 10.1016/j.ecoenv.2023.114874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Revised: 03/22/2023] [Accepted: 04/04/2023] [Indexed: 06/19/2023]
Abstract
Lead (Pb), cadmium (Cd) and total mercury (THg) are toxic heavy metals (THMs) that are widely present in the environment and can cause substantial health problems. However, previous risk assessment studies have rarely focused on the elderly population and have usually targeted a single heavy metal, which might underestimate the long-term accumulative and synergistic effects of THMs in humans. Based on the food frequency questionnaire and inductively coupled plasma mass spectrometry, this study assessed external and internal exposures to Pb, Cd and THg in 1747 elderly people in Shanghai. Probabilistic risk assessment with the relative potential factor (RPF) model was used to assess the neurotoxicity and nephrotoxicity risks of combined THMs exposures. The mean external exposures of Pb, Cd and THg in Shanghai elderly were 46.8, 27.2 and 4.9 μg/day, respectively. Plant-based foods are the main source of Pb and THg exposure, while Cd is mainly from animal-based foods. The mean concentrations of Pb, Cd and THg were 23.3, 1.1 and 2.3 μg/L in the whole blood, and 6.2, 1.0 and 2.0 μg/L in the morning urine, respectively. Combined exposure to THMs leading to 10.0 % and 7.1 % of Shanghai elderly at risk of neurotoxicity and nephrotoxicity. The results of this study have important implications for understanding the profiles of Pb, Cd and THg exposure in the elderly living in Shanghai and provide data support for risk assessment and control of nephrotoxicity and neurotoxicity from combined THMs exposure in the elderly.
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Affiliation(s)
- Ying Qing
- Shanghai University of Medicine & Health Sciences Affiliated Zhoupu Hospital, Shanghai 201300, China; Shanghai University of Medicine & Health Sciences, Shanghai 201318, China
| | | | - TianRan Tang
- Guizhou Meteorological Observatory, Guizhou 550081, China
| | - Shichun Li
- Shanghai University of Medicine & Health Sciences, Shanghai 201318, China
| | - Shiyu Cao
- Shanghai University of Medicine & Health Sciences, Shanghai 201318, China
| | - Yingyi Luo
- Shanghai University of Medicine & Health Sciences, Shanghai 201318, China
| | - Yanfeng Chen
- Shanghai University of Medicine & Health Sciences, Shanghai 201318, China
| | - Wenting He
- Shanghai University of Medicine & Health Sciences, Shanghai 201318, China
| | - Jutao Wang
- Shanghai University of Medicine & Health Sciences, Shanghai 201318, China
| | - Yang Zhou
- Shanghai University of Medicine & Health Sciences, Shanghai 201318, China
| | - Chenchen Xu
- Shanghai University of Medicine & Health Sciences, Shanghai 201318, China
| | - Weiwen Zhang
- Shanghai University of Medicine & Health Sciences, Shanghai 201318, China
| | - Siyuan Ping
- Shanghai University of Medicine & Health Sciences, Shanghai 201318, China
| | - Meng Jiang
- Shanghai University of Medicine & Health Sciences, Shanghai 201318, China
| | - Dan Li
- Shanghai University of Medicine & Health Sciences, Shanghai 201318, China
| | - Yunhe Ji
- Shanghai University of Medicine & Health Sciences, Shanghai 201318, China
| | - Shuyu Yang
- Nutrilite Health Institute, Shanghai 201203, China
| | - Jun Du
- Nutrilite Health Institute, Shanghai 201203, China.
| | - Yanfei Li
- Shanghai University of Medicine & Health Sciences Affiliated Zhoupu Hospital, Shanghai 201300, China.
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10
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Adly HM, Saati AA, Khafagy AA, Alandiyjany MN, Saleh SAK. Evaluation of School-Age Children's Intelligence Quotient and Their Chronic Exposure to Trace Elements in Ambient Air. Cureus 2023; 15:e37532. [PMID: 37187629 PMCID: PMC10181894 DOI: 10.7759/cureus.37532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/13/2023] [Indexed: 05/17/2023] Open
Abstract
Background Children's exposure to different trace elements in their air, water, and food or even present in paints or toys can affect their intelligence quotient (IQ) score. However, this correlation needs to be analyzed and evaluated in different contexts. This study aimed to investigate the associations between airborne concentrations of lead (Pb), manganese (Mn), cadmium (Cd), chromium (Cr), and arsenic (As) and intellectual function in school-age children in Makkah, Kingdom of Saudi Arabia. Methodology Our cohort study aimed to explore the link between exposure to various trace elements in the surrounding air and the IQ scores of children residing in the vicinity of Makkah. We included 430 children in the study and collected information about demographic and lifestyle factors using a structured questionnaire. We employed a mini volume sampler (MiniVol, AirMetrics, Springfield, OR, USA) to collect 24-hour PM10 samples from five locations in Makkah, representing various residential areas with small-to-medium industrial activities and traffic load. We analyzed the samples for Pb, Mn, Cd, Cr, and As concentrations using inductively coupled plasma-mass spectrometry with Perkin Elmer 7300 (Perkin Elmer, Waltham, MA, USA). The combined impact of heavy metals on continuous outcomes was assessed using the Bayesian kernel machine regression model. Results The mean atmospheric concentrations of Pb, Mn, Cd, Cr, and As in summer were 0.093, 0.006, 0.36, 0.15, and 0.017 µg/m3, respectively, while in winter, they were 0.004, 0.003, 0.12, 0.006, and 0.01 µg/m3, respectively. The findings of our study revealed that children's IQ scores were independently associated with co-exposure to the five metals, namely, Pb, Mn, Cd, Cr, and As. Conclusions This study demonstrates a link between combined exposure to five heavy metals (Pb, Mn, Cd, Cr, and As) and children's IQ scores. Regularly evaluating trace elements in children's biological samples is crucial to comprehend their effects on cognitive growth. To explore the possible future health risks of multimetal exposures and their interaction effects, it is imperative to conduct additional studies that involve repeated biological measurements of metal concentrations.
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Affiliation(s)
- Heba M Adly
- Department of Community Medicine and Pilgrims Health Care, Faculty of Medicine, Umm Al-Qura University, Makkah, SAU
| | - Abdullah A Saati
- Department of Community Medicine and Pilgrims Health Care, Faculty of Medicine, Umm Al-Qura University, Makkah, SAU
| | - Abdullah A Khafagy
- Department of Community Medicine and Pilgrims Health Care, Faculty of Medicine, Umm Al-Qura University, Makkah, SAU
| | - Maher N Alandiyjany
- Department of Laboratory Medicine, Faculty of Applied Medical Sciences, Umm Al-Qura University, Makkah, SAU
- Quality and Development Affairs, Batterjee Medical College, Jeddah, SAU
| | - Saleh A K Saleh
- Department of Biochemistry, Faculty of Medicine, Umm Al-Qura University, Makkah, SAU
- Oncology Diagnostic Unit, Faculty of Medicine, Ain Shams University, Cairo, EGY
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11
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Zhang B, Wang Z, Zhang J, Dai Y, Feng C, Lin Y, Zhang L, Guo J, Qi X, Chang X, Lu D, Wu C, Zhou Z. Prenatal perfluoroalkyl substances exposure and neurodevelopment in toddlers: Findings from SMBCS. CHEMOSPHERE 2023; 313:137587. [PMID: 36535498 DOI: 10.1016/j.chemosphere.2022.137587] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Revised: 12/13/2022] [Accepted: 12/15/2022] [Indexed: 06/17/2023]
Abstract
BACKGROUND Prenatal perfluoroalkyl substances (PFAS) exposure has been reported to affect offspring neurodevelopment, while epidemiological evidences were limited and inconsistent. OBJECTIVES We aimed to evaluate the associations between cord serum PFAS concentrations and neurodevelopment in toddlers from 1 to 3 years of age. METHODS A total of 716 children from Sheyang Mini Birth Cohort Study (SMBCS) were included in this study. 12 PFAS concentrations were quantified in cord serum. Neurodevelopment was assessed using the Developmental Screen Test for Children Aged 0-6 Years at 1 year and the Gesell Developmental Schedules (GDS) at 2 and 3 years, respectively. Development quotient (DQ) z-score was standardized from DQ to eliminate the difference caused by two methods. We used generalized linear model (GLM) and Bayesian kernel machine regression (BKMR) to explore the associations of single or mixture PFAS exposure with neurodevelopment measurements at each time point. Associations between PFAS exposure and longitudinal changes in DQ z-score were investigated through generalized estimating equation (GEE) and trajectory analysis. RESULTS In general, prenatal PFAS concentrations showed negative associations with neurodevelopment measurements at specific age. When accounting for longitudinal changes from 1 to 3 years of age, PFOA was negatively associated with DQ z-score (β = -0.212, 95% CI: -0.422, -0.003), the association was only found significant in boys after stratified by gender (β = -0.327, 95% CI: -0.616, -0.038). Meanwhile, increased PFBS (OR = 2.159, 95% CI: 1.177, 3.959) and PFHpA (OR = 1.700, 95% CI: 1.016, 2.846) exposure was associated with elevated odds for the low-score trajectory group. The results of mixture of PFAS further confirmed above findings. CONCLUSIONS Our findings suggested that prenatal PFAS exposure may be associated with adverse neurodevelopment effects in the first 3 years of life. Further studies are warranted to confirm our findings.
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Affiliation(s)
- Boya Zhang
- School of Public Health/MOE Key Laboratory of Public Health Safety/ NHC Key Lab of Health Technology Assessment, Fudan University, No.130 Dong'an Road, Shanghai, 200032, China
| | - Zheng Wang
- School of Public Health/MOE Key Laboratory of Public Health Safety/ NHC Key Lab of Health Technology Assessment, Fudan University, No.130 Dong'an Road, Shanghai, 200032, China
| | - Jiming Zhang
- School of Public Health/MOE Key Laboratory of Public Health Safety/ NHC Key Lab of Health Technology Assessment, Fudan University, No.130 Dong'an Road, Shanghai, 200032, China
| | - Yiming Dai
- School of Public Health/MOE Key Laboratory of Public Health Safety/ NHC Key Lab of Health Technology Assessment, Fudan University, No.130 Dong'an Road, Shanghai, 200032, China
| | - Chao Feng
- Shanghai Municipal Center for Disease Control and Prevention/State Environmental Protection Key Laboratory of Environmental Health Impact Assessment of Emerging Contaminants, No. 1380 West Zhongshan Road, Shanghai, 200336, China
| | - Yuanjie Lin
- Shanghai Municipal Center for Disease Control and Prevention/State Environmental Protection Key Laboratory of Environmental Health Impact Assessment of Emerging Contaminants, No. 1380 West Zhongshan Road, Shanghai, 200336, China
| | - Lei Zhang
- School of Public Health/MOE Key Laboratory of Public Health Safety/ NHC Key Lab of Health Technology Assessment, Fudan University, No.130 Dong'an Road, Shanghai, 200032, China
| | - Jianqiu Guo
- School of Public Health/MOE Key Laboratory of Public Health Safety/ NHC Key Lab of Health Technology Assessment, Fudan University, No.130 Dong'an Road, Shanghai, 200032, China
| | - Xiaojuan Qi
- School of Public Health/MOE Key Laboratory of Public Health Safety/ NHC Key Lab of Health Technology Assessment, Fudan University, No.130 Dong'an Road, Shanghai, 200032, China; Zhejiang Provincial Center for Disease Control and Prevention, No. 3399 Binsheng Road, Hangzhou, 310051, China
| | - Xiuli Chang
- School of Public Health/MOE Key Laboratory of Public Health Safety/ NHC Key Lab of Health Technology Assessment, Fudan University, No.130 Dong'an Road, Shanghai, 200032, China
| | - Dasheng Lu
- Shanghai Municipal Center for Disease Control and Prevention/State Environmental Protection Key Laboratory of Environmental Health Impact Assessment of Emerging Contaminants, No. 1380 West Zhongshan Road, Shanghai, 200336, China
| | - Chunhua Wu
- School of Public Health/MOE Key Laboratory of Public Health Safety/ NHC Key Lab of Health Technology Assessment, Fudan University, No.130 Dong'an Road, Shanghai, 200032, China.
| | - Zhijun Zhou
- School of Public Health/MOE Key Laboratory of Public Health Safety/ NHC Key Lab of Health Technology Assessment, Fudan University, No.130 Dong'an Road, Shanghai, 200032, China.
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12
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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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13
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Ventre S, Desai G, Roberson R, Kordas K. Toxic metal exposures from infant diets: Risk prevention strategies for caregivers and health care professionals. Curr Probl Pediatr Adolesc Health Care 2022; 52:101276. [PMID: 36266220 DOI: 10.1016/j.cppeds.2022.101276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Concerns are growing regarding the presence of toxic elements such as arsenic (As), cadmium (Cd), mercury (Hg), and lead (Pb) in the ingredients and prepared foods for infants and young children. There are few clear, evidence-based, guidelines on the maximum tolerable limits of toxicants in foods and little understanding of toxicant exposure or adverse health effects attributable to dietary exposure. Caregivers are faced with the burden of making decisions about which foods to select, how often to feed them to their children, and what foods to limit. This article reviews the current literature and existing recommendations on dietary exposure to toxic elements in children under 2 years of age, and their health effects in early childhood-focusing on growth, neurodevelopment, and immune function. The article also outlines best practices for healthcare providers to address the concerns of toxic element exposure through the diet in young children. Several foods consistently appear in the literature as potential sources of toxic element exposure. Contaminated drinking and cooking water, including water used to prepare infant formula, could also be a major exposure source. In the absence of stronger evidence on effects of dietary modification, exclusive breastfeeding until six months of age, followed by a diverse diet are some strategies to reduce dietary toxic element exposure while ensuring an adequate and balanced nutrient intake. Healthcare providers can support families by sharing information and encouraging blood Pb testing, the only element for which such testing is currently recommended.
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Affiliation(s)
- Sarah Ventre
- Department of Pediatrics, University at Buffalo, USA; New York State Children's Environmental Health Center, USA.
| | - Gauri Desai
- Department of Epidemiology and Environmental Health, University at Buffalo, USA
| | | | - Katarzyna Kordas
- Department of Epidemiology and Environmental Health, University at Buffalo, USA
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14
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Ijomone OM, Iroegbu JD, Morcillo P, Ayodele AJ, Ijomone OK, Bornhorst J, Schwerdtle T, Aschner M. Sex-dependent metal accumulation and immunoexpression of Hsp70 and Nrf2 in rats' brain following manganese exposure. ENVIRONMENTAL TOXICOLOGY 2022; 37:2167-2177. [PMID: 35596948 PMCID: PMC9357062 DOI: 10.1002/tox.23583] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 04/21/2022] [Accepted: 05/06/2022] [Indexed: 06/15/2023]
Abstract
Manganese (Mn), although important for multiple cellular processes, has posed environmental health concerns due to its neurotoxic effects. In recent years, there have been extensive studies on the mechanism of Mn-induced neuropathology, as well as the sex-dependent vulnerability to its neurotoxic effects. Nonetheless, cellular mechanisms influenced by sex differences in susceptibility to Mn have yet to be adequately characterized. Since oxidative stress is a key mechanism of Mn neurotoxicity, here, we have probed Hsp70 and Nrf2 proteins to investigate the sex-dependent changes following exposure to Mn. Male and female rats were administered intraperitoneal injections of MnCl2 (10 mg/kg and 25 mg/kg) 48 hourly for a total of eight injections (15 days). We evaluated changes in body weight, as well as Mn accumulation, Nrf2 and Hsp70 expression across four brain regions; striatum, cortex, hippocampus and cerebellum in both sexes. Our results showed sex-specific changes in body-weight, specifically in males but not in females. Additionally, we noted sex-dependent accumulation of Mn in the brain, as well as in expression levels of Nrf2 and Hsp70 proteins. These findings revealed sex-dependent susceptibility to Mn-induced neurotoxicity corresponding to differential Mn accumulation, and expression of Hsp70 and Nrf2 across several brain regions.
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Affiliation(s)
- Omamuyovwi M. Ijomone
- Departments of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY, USA
- The Neuro- Lab, Department of Human Anatomy, School of Basic Medical Sciences, Federal University of Technology Akure, Akure, Nigeria
| | - Joy D. Iroegbu
- The Neuro- Lab, Department of Human Anatomy, School of Basic Medical Sciences, Federal University of Technology Akure, Akure, Nigeria
| | - Patricia Morcillo
- Departments of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Akinyemi J. Ayodele
- Departments of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Olayemi K. Ijomone
- The Neuro- Lab, Department of Human Anatomy, School of Basic Medical Sciences, Federal University of Technology Akure, Akure, Nigeria
- Department of Anatomy, Faculty of Basic Medical Sciences, University of Medical Sciences, Ondo, Nigeria
| | - Julia Bornhorst
- Food Chemistry, Faculty of Mathematics and Natural Sciences, University of Wuppertal, Wuppertal, Germany
- TraceAge – DFG Research Unit on Interactions of Essential Trace Elements in Healthy and Diseased Elderly (FOR 2558), Berlin-Potsdam-Jena-Wuppertal, Germany
| | - Tanja Schwerdtle
- TraceAge – DFG Research Unit on Interactions of Essential Trace Elements in Healthy and Diseased Elderly (FOR 2558), Berlin-Potsdam-Jena-Wuppertal, Germany
- Department of Food Chemistry, Institute of Nutritional Science, University of Potsdam, Nuthetal, Germany
| | - Michael Aschner
- Departments of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY, USA
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15
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Wang Y, Wang Y, Yan C. Gender differences in trace element exposures with cognitive abilities of school-aged children: a cohort study in Wujiang city, China. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:64807-64821. [PMID: 35474433 DOI: 10.1007/s11356-022-20353-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Accepted: 04/15/2022] [Indexed: 06/14/2023]
Abstract
Trace elements persist in the environment, and their early exposure may adversely affect children's intellectual development. To clarify the influence of blood trace element levels in newborns and school-aged children, we used Wechsler Intelligence Scale for children (WISC-CR) to explore intellectual development level of 148 school-aged children based on a population cohort study. Lead (Pb), selenium (Se), arsenic (As), copper (Cu), manganese (Mn) and chromium (Cr) in cord blood and Pb, As, Cu in venous blood were determined by inductively coupled plasma mass spectrometry (ICP-MS) and atomic absorption spectrometer (AAS). Our analysis of the correlation between children's mental development and trace element content found children's cognitive abilities negatively correlate with Pb (PIQ: β=-0.109, P=0.03737) and Cu (PIQ: β=-0.031, P=0.04431; FISQ: β=-0.031, P=0.02137) levels in cord blood. Prenatal low-level As exposure may negatively affect girls' performance intelligence quotient (PIQ) and verbal intelligence quotient (VIQ). There were differences in Se levels in cord blood and venous blood between boys and girls (P=0.010; P=0.073). High Se levels were associated with a lower VIQ in boys and a higher VIQ in girls. Prenatal exposure to Pb, As and Cu may weaken children's cognitive abilities at school age. Se exposure may have opposite effects on cognitive abilities affected by dose and gender.
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Affiliation(s)
- Yihong Wang
- Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, No.1665, Kongjiang Road, Shanghai, 200092, China
| | - Yaqian Wang
- School of Public Health, Shanghai Jiao Tong University, Shanghai, China
| | - Chonghuai Yan
- Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, No.1665, Kongjiang Road, Shanghai, 200092, China.
- School of Public Health, Shanghai Jiao Tong University, Shanghai, China.
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16
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Signes-Pastor AJ, Romano ME, Jackson B, Braun JM, Yolton K, Chen A, Lanphear B, Karagas MR. Associations of maternal urinary arsenic concentrations during pregnancy with childhood cognitive abilities: The HOME study. Int J Hyg Environ Health 2022; 245:114009. [PMID: 35947921 PMCID: PMC9500348 DOI: 10.1016/j.ijheh.2022.114009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 07/07/2022] [Accepted: 07/15/2022] [Indexed: 11/22/2022]
Abstract
Arsenic exposure during pregnancy may increase the risk for intellectual deficits in children, but limited data exist from prospective epidemiologic studies, particularly at low arsenic exposure levels. We investigated the association between prenatal maternal urinary arsenic concentrations and childhood cognitive abilities in the Health Outcomes and Measures of the Environment (HOME) Study. We used anion exchange chromatography coupled with inductively coupled plasma mass spectrometry detection to measure arsenic species content in pregnant women's urine. The summation of inorganic arsenic (iAs), monomethylarsonic acid (MMA), and dimethylarsinic acid (DMA) refers to ∑As. We assessed children's cognitive function (n = 260) longitudinally at 1-, 2-, and 3-years using Bayley Scales of Infant and Toddler Development, at 5 years using Wechsler Preschool and Primary Scale of Intelligence, and at 8 years using Wechsler Intelligence Scale for Children. We observed a modest decrease in mental development index and full-scale intelligence quotient at ages 3 and 5 years with each doubling of ∑As with estimated score (ß) differences and 95% confidence interval (CI) of -1.8 from -4.1 to 0.5 and -2.5 from -5.1 to 0.0, respectively. This trend was stronger and reached statistical significance among children whose mothers had lower iAs methylation capacity and low urinary arsenobetaine concentrations. Our findings suggest that arsenic exposure levels relevant to the general US population may affect children's cognitive abilities.
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Affiliation(s)
- Antonio J Signes-Pastor
- Department of Epidemiology, Geisel School of Medicine, Dartmouth College, NH, USA; Unidad de Epidemiología de la Nutrición. Universidad Miguel Hernández, Alicante, Spain; CIBER de Epidemiología y Salud Pública (CIBERESP), Instituto de Salud Carlos III (ISCIII), Madrid, Spain; Instituto de Investigación Sanitaria y Biomédica de Alicante (ISABIAL), Spain.
| | - Megan E Romano
- Department of Epidemiology, Geisel School of Medicine, Dartmouth College, NH, USA.
| | - Brian Jackson
- Department of Earth Sciences, Dartmouth College, Hanover, NH, USA
| | - Joseph M Braun
- Department of Epidemiology, Brown University, Providence, RI, USA
| | - Kimberly Yolton
- Department of Pediatrics, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Aimin Chen
- Department of Biostatistics, Epidemiology and Informatics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
| | - Bruce Lanphear
- Child and Family Research Institute, BC Children's and Women's Hospital, Vancouver, BC, Canada; Faculty of Health Sciences, Simon Fraser University, Burnaby, BC, Canada
| | - Margaret R Karagas
- Department of Epidemiology, Geisel School of Medicine, Dartmouth College, NH, USA
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17
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Chatterjee M, Kortenkamp A. Cadmium exposures and deteriorations of cognitive abilities: estimation of a reference dose for mixture risk assessments based on a systematic review and confidence rating. Environ Health 2022; 21:69. [PMID: 35836177 PMCID: PMC9281031 DOI: 10.1186/s12940-022-00881-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Accepted: 06/24/2022] [Indexed: 05/24/2023]
Abstract
To support a mixture risk assessment with a focus on developmental neurotoxicity we evaluated the strength of evidence for associations of cadmium exposures with declines in IQ by conducting a systematic review and confidence rating. We searched peer-reviewed studies published in English between 2012 and July 2021 and identified 15 eligible studies (11 prospective cohort studies, and 4 cross-sectional studies). Of the 10 studies that observed associations of cadmium exposure with child IQ declines, two achieved an overall "High (H)" confidence rating, five a "Medium to High (M/H)", one a "Medium (M)" and two a "Low (L)" confidence rating. Five studies did not detect significant associations between cadmium exposure and reduced cognitive ability; of these, two received a "High (H)" confidence rating, two an overall rating of "Medium to High (M/H)" and one a "Medium (M)" rating. The null findings reported by the "High (H)" and Medium to High (M/H)" studies could partly be explained by low exposures to cadmium or confounding with high levels of lead. By using a one-compartment toxicokinetic model in a reverse dosimetry approach, we estimated that a daily intake of 0.2 μg/kg body weight/day corresponds to urinary cadmium levels no longer associated with cognitive declines observed in a "High (H)"-confidence study. This estimate is 1.8-fold lower than the current health-based guidance value (HBGV) for kidney toxicity of 0.36 μg/kg bodyweight/day established by the European Food Safety Authority (EFSA). Our value does not have the normative character associated with health-based guidance values and is intended only as a reasonable estimate for the purpose of mixture risk assessments. However, with cadmium exposures in Europe between 0.28 (middle bound) and up to 0.52 μg/kg bodyweight/day (95th percentile), our review suggests that pregnant women and children are poorly protected against neurodevelopmental effects. This warrants a revision of the current HBGV.
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Affiliation(s)
- Mousumi Chatterjee
- College of Health, Medicine and Life Sciences, Brunel University London, Centre for Pollution Research and Policy Kingston Lane, Uxbridge, UB8 3PH UK
| | - Andreas Kortenkamp
- College of Health, Medicine and Life Sciences, Brunel University London, Centre for Pollution Research and Policy Kingston Lane, Uxbridge, UB8 3PH UK
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18
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Mohammadi S, Shafiee M, Faraji SN, Rezaeian M, Ghaffarian-Bahraman A. Contamination of breast milk with lead, mercury, arsenic, and cadmium in Iran: a systematic review and meta-analysis. Biometals 2022; 35:711-728. [PMID: 35575819 DOI: 10.1007/s10534-022-00395-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Accepted: 04/29/2022] [Indexed: 12/29/2022]
Abstract
Breast milk is a complete food for the development of the newborn, but it can also be an important route for environmental pollutants transmission to the infants. This study was aimed to evaluate the status of heavy metals including lead (Pb), mercury (Hg), cadmium (Cd) and arsenic (As) in the breast milk of Iranian mothers. The international databases including Scopus, PubMed, Web of Science and the Persian electronic databases including Scientific Information Database, IranMedex and Magiran were examined to find relevant articles published until July 2021. A total of 23 studies examined the levels of toxic metals in Iranian breast milk samples. According to the findings, the pooled average concentrations (µg/L) of Pb, Cd, Hg and As were 25.61, 2.40, 1.29 and 1.16, respectively. The concentration of Hg and Pb in colostrum milk was more than twice of mature milk. The Hg mean concentration in the breast milk of mothers with at least one amalgam-filled tooth was approximately three times that of mothers without amalgam-filled teeth. Risk assessment analysis indicated that the intake of Pb and Hg by infants through breastfeeding can be considered a health concern in Iran. It seems necessary to reduce the Pb exposure of pregnant and lactating women in Iran. However, more extensive studies are needed to clarify the toxic metals' exposure status of infants through breast milk in other parts of the country.
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Affiliation(s)
- Salman Mohammadi
- Nutritional Health Research Center, Lorestan University of Medical Sciences, Khorramabad, Iran
| | - Maryam Shafiee
- Nephro-Urology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Seyed Nooreddin Faraji
- School of Advanced Medical Sciences and Technologies, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Mohsen Rezaeian
- Department of Epidemiology and Biostatistics, Occupational Environment Research Center, Medical School, Rafsanjan University of Medical Sciences, Rafsanjan, Iran
| | - Ali Ghaffarian-Bahraman
- Occupational Environment Research Center, Rafsanjan University of Medical Sciences, Rafsanjan, Iran.
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19
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Liu C, Huang L, Huang S, Wei L, Cao D, Zan G, Tan Y, Wang S, Yang M, Tian L, Tang W, He C, Shen C, Luo B, Zhu M, Liang T, Pang B, Li M, Mo Z, Yang X. Association of both prenatal and early childhood multiple metals exposure with neurodevelopment in infant: A prospective cohort study. ENVIRONMENTAL RESEARCH 2022; 205:112450. [PMID: 34861232 DOI: 10.1016/j.envres.2021.112450] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 10/15/2021] [Accepted: 11/24/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND Impaired neurodevelopment of children has become a growing public concern; however, the associations between metals exposure and neurocognitive function have remained largely unknown. OBJECTIVES We systematically evaluated the associations of multiple metals exposure during pregnancy and childhood on the neurodevelopment of children aged 2-3 years. METHODS We measured 22 metals in the serum and urine among703 mother-child pairs from the Guangxi Birth Cohort Study. The neurocognitive development of children was assessed by the Gesell Development Diagnosis Scale (GDDS; Chinese version). Multiple linear regression models were used to evaluate the relationship between the metals (selected by elastic net regression) and the outcomes. The Bayesian kernel machine regression (BKMR) was used to evaluate the possible joint effect between the multiple metal mixture and the outcomes. RESULTS Prenatal aluminum (Al) exposure was negatively associated with the fine motor developmental quotient (DQ) (β = -1.545, 95%CI: 2.231, -0.859), adaption DQ (β = -1.182, 95%CI: 1.632, -0.732), language DQ (β = -1.284, 95% CI: 1.758, -0.809), and social DQ (β = -1.729, 95% CI: 2.406, -1.052) in the multi-metal model. Prenatal cadmium (Cd) exposure was negatively associated with gross motor DQ (β = -2.524, 95% CI: 4.060, -0.988), while postpartum Cd exposure was negatively associated with language DQ (β = -1.678, 95% CI: 3.227, -0.129). In stratified analyses, infants of different sexes had different sensitivities to metal exposure, and neurobehavioral development was more significantly affected by metal exposure in the first and second trimester. BKMR analysis revealed a negative joint effect of the Al, Cd, and selenium (Se) on the language DQ score; postpartum Cd exposure played a major role in this relationship. CONCLUSION Prenatal exposure to Al, Ba, Cd, molybdenum (Mo), lead (Pb), antimony (Sb), and strontium (Sr), and postpartum exposure to cobalt (Co), Cd, stannum (Sn), iron (Fe), nickel (Ni), and Se are associated with neurological development of infants. The first and second trimester might be the most sensitive period when metal exposure affects neurodevelopment.
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Affiliation(s)
- Chaoqun Liu
- Center for Genomic and Personalized Medicine, Guangxi Key Laboratory for Genomic and Personalized Medicine, Guangxi Collaborative Innovation Center for Genomic and Personalized Medicine, Guangxi Medical University, 530021, Nanning, Guangxi, China; Department of Nutrition and Food Hygiene, School of Public Health, Guangxi Medical University, 530021, Nanning, Guangxi, China; Department of Public Health, School of Medicine, Guangxi University of Science and Technology, Liuzhou, 545006, Guangxi, China
| | - Lulu Huang
- Center for Genomic and Personalized Medicine, Guangxi Key Laboratory for Genomic and Personalized Medicine, Guangxi Collaborative Innovation Center for Genomic and Personalized Medicine, Guangxi Medical University, 530021, Nanning, Guangxi, China; Department of Public Health, School of Medicine, Guangxi University of Science and Technology, Liuzhou, 545006, Guangxi, China; Department of Occupational Health and Environmental Health, School of Public Health, Guangxi Medical University, 530021, Nanning, Guangxi, China
| | - Shengzhu Huang
- Center for Genomic and Personalized Medicine, Guangxi Key Laboratory for Genomic and Personalized Medicine, Guangxi Collaborative Innovation Center for Genomic and Personalized Medicine, Guangxi Medical University, 530021, Nanning, Guangxi, China
| | - Luyun Wei
- Center for Genomic and Personalized Medicine, Guangxi Key Laboratory for Genomic and Personalized Medicine, Guangxi Collaborative Innovation Center for Genomic and Personalized Medicine, Guangxi Medical University, 530021, Nanning, Guangxi, China
| | - Dehao Cao
- Center for Genomic and Personalized Medicine, Guangxi Key Laboratory for Genomic and Personalized Medicine, Guangxi Collaborative Innovation Center for Genomic and Personalized Medicine, Guangxi Medical University, 530021, Nanning, Guangxi, China
| | - Gaohui Zan
- Center for Genomic and Personalized Medicine, Guangxi Key Laboratory for Genomic and Personalized Medicine, Guangxi Collaborative Innovation Center for Genomic and Personalized Medicine, Guangxi Medical University, 530021, Nanning, Guangxi, China; Department of Occupational Health and Environmental Health, School of Public Health, Guangxi Medical University, 530021, Nanning, Guangxi, China
| | - Yanli Tan
- Center for Genomic and Personalized Medicine, Guangxi Key Laboratory for Genomic and Personalized Medicine, Guangxi Collaborative Innovation Center for Genomic and Personalized Medicine, Guangxi Medical University, 530021, Nanning, Guangxi, China; Department of Occupational Health and Environmental Health, School of Public Health, Guangxi Medical University, 530021, Nanning, Guangxi, China
| | - Sida Wang
- Department of Medical Ultrasonics, The First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, Guangxi Province, China
| | - Minjing Yang
- Department of Pediatrics, The First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, Guangxi Province, China
| | - Long Tian
- Department of Science and Education, Maternal & Child Health Hospital of Qinzhou, Qinzhou, Guangxi, China
| | - Weijun Tang
- Center for Translational Medicine, Maternal & Child Health Hospital of Qinzhou, Qinzhou, Guangxi, China
| | - Caitong He
- Department of Science and Education, Maternal & Child Health Hospital of Yulin, Yulin, Guangxi, China
| | - Chunhua Shen
- Liuzhou Maternity and Child Healthcare Hospital, Liuzhou Institute of Reproduction and Genetics, Affiliated Maternity Hospital and Affiliated Children's Hospital of Guangxi University of Science and Technology, Liuzhou, Guangxi, China
| | - Bangzhu Luo
- Department of Medical Services Section, Maternal & Child Health Hospital of Guigang, Guigang, Guangxi, China
| | - Maoling Zhu
- Department of Obstetrics, Maternal & Child Health Hospital of Nanning, Nanning, Guangxi, China
| | - Tao Liang
- Department of Pediatrics, Maternal & Child Health Hospital of Wuzhou, Wuzhou, Guangxi, China
| | - Baohong Pang
- Department of Women Health Care, Maternal & Child Health Hospital of Yuzhou, Yulin, Guangxi, China
| | - Mujun Li
- Department of Reproductive Center, First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Zengnan Mo
- Center for Genomic and Personalized Medicine, Guangxi Key Laboratory for Genomic and Personalized Medicine, Guangxi Collaborative Innovation Center for Genomic and Personalized Medicine, Guangxi Medical University, 530021, Nanning, Guangxi, China; Department of Urology and Nephrology, First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Xiaobo Yang
- Center for Genomic and Personalized Medicine, Guangxi Key Laboratory for Genomic and Personalized Medicine, Guangxi Collaborative Innovation Center for Genomic and Personalized Medicine, Guangxi Medical University, 530021, Nanning, Guangxi, China; Department of Public Health, School of Medicine, Guangxi University of Science and Technology, Liuzhou, 545006, Guangxi, China; Department of Occupational Health and Environmental Health, School of Public Health, Guangxi Medical University, 530021, Nanning, Guangxi, China.
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20
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A scoping review of infant and children health effects associated with cadmium exposure. Regul Toxicol Pharmacol 2022; 131:105155. [DOI: 10.1016/j.yrtph.2022.105155] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 02/22/2022] [Accepted: 03/01/2022] [Indexed: 11/17/2022]
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21
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Islam GMR, Rahman MM, Hasan MI, Tadesse AW, Hamadani JD, Hamer DH. Hair, serum and urine chromium levels in children with cognitive defects: A systematic review and meta-analysis of case control studies. CHEMOSPHERE 2022; 291:133017. [PMID: 34813844 PMCID: PMC8792285 DOI: 10.1016/j.chemosphere.2021.133017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 10/11/2021] [Accepted: 11/19/2021] [Indexed: 05/02/2023]
Abstract
Environmental chromium exposure may cause impaired development of children. We conducted a systematic review and meta-analysis. Electronic databases including PubMed, Embase, Web of Science and CINAHL were searched to identify case-control studies that reported childhood Cr exposure and cognitive development. The Newcastle-Ottawa Scale (NOS) was used to ensure the quality of the included studies. Cr levels were compared in cases and controls, and a random effect meta-analysis was performed using Stata version 16. Twelve of 61 studies identified in the literature search were eligible for this analysis. Hair, serum and urine Cr measurements were reported by seven, two and one studies, respectively. In addition, one study reported both serum and hair Cr exposure and another reported urine and hair Cr exposure. The pooled standard mean differences (SMD) showed that hair Cr levels were non-significantly lower among children with cognitive defects (-0.01 μg/g, 95% CI: -0.04, 00, p = 0.27). In serum and urine, the pooled SMD was higher in children with cognitive deficits compared with healthy control children (0.32 μg/g, 95% CI: -0.78, 1.42, p = 0.56 and 0.64 μg/g, CI: -0.07,1.36, p = 0.08; respectively). In summary, this systematic review found no significant differences in hair, serum and urine Cr levels between children with cognitive deficits and healthy control children when all study data were pooled in the meta-analysis. Larger studies using standardized criteria and longitudinal assessment of cognitive development are needed to determine whether there is a dose response effect of childhood Cr exposure on cognitive development of children.
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Affiliation(s)
- G M Rabiul Islam
- Harvard T.H. Chan School of Public Health, Harvard University, USA; Department of Food Engineering and Tea Technology, Shahjalal University of Science and Technology, Bangladesh.
| | | | - Mohammed Imrul Hasan
- Maternal and Child Health Division, International Center for Diarrhoeal Diseases Research, Dhaka, Bangladesh
| | - Amare Worku Tadesse
- Department of Infectious Disease Epidemiology, London School of Hygiene and Tropical Medicine, SOAS University of London, UK
| | - Jena Derakhshani Hamadani
- Maternal and Child Health Division, International Center for Diarrhoeal Diseases Research, Dhaka, Bangladesh
| | - Davidson H Hamer
- Department of Global Health, Boston University School of Public Health, Boston, MA, USA; Section of Infectious Diseases, Department of Medicine, Boston University School of Medicine, Boston, MA, USA
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22
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Sasaki N, Carpenter DO. Associations between Metal Exposures and Cognitive Function in American Older Adults. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19042327. [PMID: 35206515 PMCID: PMC8871766 DOI: 10.3390/ijerph19042327] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 02/11/2022] [Accepted: 02/16/2022] [Indexed: 02/04/2023]
Abstract
Cognitive function frequently declines with older age, independently of the development of neurodegenerative diseases, and few interventions are known to counter this decline. Exposure to neurotoxic metals may contribute to this decline in cognitive function in older adults. Using the National Health and Nutrition Examination Survey (NHANES) data, the performance of 3042 adults aged 60 years and older on three cognitive tests for immediate, delayed, and working memory were examined in relation to blood concentrations of seven metals and metalloids and urinary concentrations of nineteen metals and metabolites. Using linear regression models, associations between cognitive tests and logarithms of metal exposures were adjusted for age, sex, ethnicity, education level, depression, diabetes, alcohol consumption, and cigarette use. Increased selenium was strongly associated with better performance on all three cognitive tests. Cadmium and lead were negatively associated with performance on all three cognitive tests. Some urinary metabolites of arsenic, urinary lead, cadmium, and tungsten were significantly associated with poor performance on some tests. In older adults, higher selenium levels were strongly associated with better cognitive performance.
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Affiliation(s)
- Nozomi Sasaki
- Department of Environmental Health Science, School of Public Health, University at Albany, Rensselaer, NY 12144, USA
- Correspondence: (N.S.); (D.O.C.)
| | - David O. Carpenter
- Department of Environmental Health Science, School of Public Health, University at Albany, Rensselaer, NY 12144, USA
- Institute for Health and the Environment, University at Albany, Rensselaer, NY 12144, USA
- Correspondence: (N.S.); (D.O.C.)
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23
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Association between blood metals mixtures concentrations and cognitive performance, and effect modification by diet in older US adults. Environ Epidemiol 2022; 6:e192. [PMID: 35169670 PMCID: PMC8835643 DOI: 10.1097/ee9.0000000000000192] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Accepted: 12/14/2021] [Indexed: 11/27/2022] Open
Abstract
Background: Chronic exposure to heavy metals has been associated with adverse neurological outcomes in older adults. Inflammatory processes are suspected as an underlying pathway by which metals exert their neurotoxicity. In parallel, a diet rich in antioxidant and anti-inflammatory components may protect against chronic inflammation. Objectives: We examined the associations of blood concentrations of lead, cadmium, and manganese as a mixture with cognitive performance in older US adults and potential modification of these associations by diet as measured by the Healthy Eating Index 2015 (HEI-2015) and the Adapted Dietary Inflammatory Index (ADII). Methods: We used data on 1,777 adults ≥60 years old from the US National Health and Nutrition Examination Survey (NHANES; 2011–2014). We derived the ADII and the HEI-2015 from two nonconsecutive 24-hour diet recalls. Cognitive performance was measured by the Consortium to Establish a Registry for Alzheimer’s Disease (CERAD) Word Learning subtest, the animal fluency test, and the Digit Symbol Substitution Test (DSST). We also constructed a composite z-score reflecting overall cognitive performance. We used quantile g-computation to evaluate the joint associations of a mixture of metals with cognitive performance test scores. We also evaluated effect modification by sex and diet quality indices using Cochran Q tests. Results: The median (interquartile range) of blood metals were 0.38 μg/L (0.35), 14.70 μg/L (11.70), and 8.74 μg/L (4.06) for cadmium, lead, and manganese, respectively. Increasing blood concentrations of all metals by one quartile was associated with a decrease in overall cognitive performance (–0.04; 95% confidence interval [CI] = –0.09, 0.02), CERAD (–0.04; 95% CI = –0.12, 0.03), animal fluency (–0.02; 95% CI, –0.11, 0.06), and DSST (–0.05; 95% CI = –0.11, 0.02) test scores. These associations were more pronounced in adults with high pro-inflammatory or low-diet quality and null or positive though imprecise associations in participants with a high anti-inflammatory. These associations also varied by sex with inverse associations in men and positive associations in women. Conclusions: Our findings suggest that adherence to an antioxidant and anti-inflammatory diet may prevent blood metals adverse cognitive effects among older adults. If confirmed, strategies based on diet could provide a potential complementary and efficient approach to counteract effects of environmental pollutants.
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24
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Ramírez V, Gálvez-Ontiveros Y, González-Domenech PJ, Baca MÁ, Rodrigo L, Rivas A. Role of endocrine disrupting chemicals in children's neurodevelopment. ENVIRONMENTAL RESEARCH 2022; 203:111890. [PMID: 34418446 DOI: 10.1016/j.envres.2021.111890] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 07/08/2021] [Accepted: 08/12/2021] [Indexed: 06/13/2023]
Abstract
Environmental stressors, like endocrine disrupting chemicals (EDC), are considered important contributors to the increased rates of neurodevelopmental dysfunctions. Considering the cumulative research on adverse neurodevelopmental effects associated with prenatal exposure to EDC, the purpose of this study was to review the available limited literature about the effects of postnatal exposure to EDC on child neurodevelopment and behaviour. Despite widespread children's exposure to EDC, there are a limited number of epidemiological studies on the association of this exposure with neurodevelopmental disorders, in particular in the postnatal period. The available research suggests that postnatal EDC exposure is related to adverse neurobehavioral outcomes in children; however the underlying mechanisms of action remain unclear. Timing of exposure is a key factor determining potential neurodevelopmental consequences, hence studying the impact of multiple EDC co-exposure in different vulnerable life periods could guide the identification of sensitive subpopulations. Most of the reviewed studies did not take into account sex differences in the EDC effects on children neurodevelopment. We believe that the inclusion of sex in the study design should be considered as the role of EDC on children neurodevelopment are likely sex-specific and should be taken into consideration when determining susceptibility and potential mechanisms of action.
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Affiliation(s)
- Viviana Ramírez
- Department of Nutrition and Food Science, University of Granada, Granada, Spain
| | - Yolanda Gálvez-Ontiveros
- Department of Nutrition and Food Science, University of Granada, Granada, Spain; Instituto de Investigación Biosanitaria ibs. GRANADA, Granada, Spain
| | - Pablo José González-Domenech
- Instituto de Investigación Biosanitaria ibs. GRANADA, Granada, Spain; Department of Psychiatry, University of Granada, Granada, Spain
| | | | - Lourdes Rodrigo
- Department of Legal Medicine and Toxicology, University of Granada, Granada, Spain.
| | - Ana Rivas
- Department of Nutrition and Food Science, University of Granada, Granada, Spain; Instituto de Investigación Biosanitaria ibs. GRANADA, Granada, Spain
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25
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Vilcins D, Cortes-Ramirez J, Currie D, Preston P. Early environmental exposures and life-long risk of chronic non-respiratory disease. Paediatr Respir Rev 2021; 40:33-38. [PMID: 34140237 DOI: 10.1016/j.prrv.2021.05.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Accepted: 05/20/2021] [Indexed: 10/21/2022]
Abstract
Exposure to environmental hazards occurs from the earliest stages of development. There are a broad range of environmental hazards, and virtually all children are exposed to these hazards during the critical period of growth and development. The burden of many chronic diseases continues to rise, and life course studies have shown that early exposure to environmental hazards is associated with non-communicable disease in later years. This review will discuss the environmental exposures associated with four non-respiratory chronic diseases: obesity, diabetes, cardiovascular disease and neurodevelopmental /neurodegenerative conditions.
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Affiliation(s)
- Dwan Vilcins
- Children's Health and Environment Program, Child Health Research Centre, The University of Queensland, Brisbane, Australia.
| | - Javier Cortes-Ramirez
- School of Public Health and Social Work, Queensland University of Technology, Brisbane, Australia
| | | | - Paige Preston
- School of Public Health, The University of Queensland, Brisbane, Australia
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26
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Cord Blood Manganese Concentrations in Relation to Birth Outcomes and Childhood Physical Growth: A Prospective Birth Cohort Study. Nutrients 2021; 13:nu13124304. [PMID: 34959856 PMCID: PMC8705521 DOI: 10.3390/nu13124304] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 11/26/2021] [Accepted: 11/26/2021] [Indexed: 11/17/2022] Open
Abstract
Gestational exposure to manganese (Mn), an essential trace element, is associated with fetal and childhood physical growth. However, it is unclear which period of growth is more significantly affected by prenatal Mn exposure. The current study was conducted to assess the associations of umbilical cord-blood Mn levels with birth outcomes and childhood continuous physical development. The umbilical cord-blood Mn concentrations of 1179 mother-infant pairs in the Sheyang mini birth cohort were measured by graphite furnace atomic absorption spectrometry (GFAAS). The association of cord-blood Mn concentrations with birth outcomes, and the BMI z-score at 1, 2, 3, 6, 7 and 8 years old, were estimated separately using generalized linear models. The relationship between prenatal Mn exposure and BMI z-score trajectory was assessed with generalized estimating equation models. The median of cord-blood Mn concentration was 29.25 μg/L. Significantly positive associations were observed between Mn exposure and ponderal index (β, regression coefficient = 0.065, 95% CI, confidence interval: 0.021, 0.109; p = 0.004). Mn exposure was negatively associated with the BMI z-score of children aged 1, 2, and 3 years (β = -0.383 to -0.249, p < 0.05), while no significant relationships were found between Mn exposure and the BMI z-score of children at the age of 6, 7, and 8 years. Prenatal Mn exposure was related to the childhood BMI z-score trajectory (β = -0.218, 95% CI: -0.416, -0.021; p = 0.030). These results indicated that prenatal Mn exposure was positively related to the ponderal index (PI), and negatively related to physical growth in childhood, which seemed most significant at an early stage.
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27
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Shen M, Zhang C, Yi X, Guo J, Xu S, Huang Z, He M, Chen X, Luo D, Yang F. Association of multi-metals exposure with intelligence quotient score of children: A prospective cohort study. ENVIRONMENT INTERNATIONAL 2021; 155:106692. [PMID: 34148013 DOI: 10.1016/j.envint.2021.106692] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Revised: 06/02/2021] [Accepted: 06/03/2021] [Indexed: 05/23/2023]
Abstract
BACKGROUND Associations between most single metals and children's intelligence quotient (IQ) scores have been evaluated in previous studies. However, associations between multi-metal exposures and children's IQ scores have not been analyzed. OBJECTIVES To assess the joint effects of lead (Pb), manganese (Mn), antimony (Sb), tin (Sn) and titanium (Ti) co-exposure on children's IQ scores. METHODS A prospective cohort study was conducted in Shimen and Huayuan, Hunan Province, China. Urine metals levels were measured by inductively coupled plasma mass spectrometry (ICP-MS) at baseline. Children's IQ scores were repeatedly measured at baseline and follow-up following the method of Raven's Standard Progressive Matrices (SPM) and standardized as z scores. We fitted linear regression models and Bayesian kernel machine regression (BKMR) models to investigate the associations of metal levels with children's IQ scores after adjusting for covariates. RESULTS A total of 633 participants aged 7-10 years completed the survey. Urinary Pb (β = -0.028, P = 0.022) and urinary Ti (β = -0.0003, P = 0.001) were inversely associated with children's IQ scores. The BKMR analyses revealed significant negative overall effects of the five metals on children's IQ scores when all the metals were above their median levels, while significant positive associations were shown when all the metal concentrations were below their median levels. The model also showed negative trends of Sn and Ti on children's IQ. Furthermore, Ti and Sn had a synergistic relationship, with a decline in IQ score when Sn exposure was relatively high. The urinary Sn concentration was significantly higher but the urinary Ti concentration was significantly lower in participants from the Shimen area than in those from the Huayuan area. Decreasing trends of the overall effects were observed in both the Shimen and Huayuan areas. CONCLUSION Our findings revealed that multi-metal exposures caused a decline in children's IQ scores according to traditional linear regression models and the BKMR model. Our results provide some evidence of the association between multi-metal exposure and children's IQ. Meanwhile, interactions between multi-metal exposures on children's IQ should be given more attention.
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Affiliation(s)
- Minxue Shen
- Department of Social Medicine and Health Management, Xiangya School of Public Health, Central South University, Changsha, China; Department of Dermatology, Xiangya Hospital, Central South University, Changsha, China.
| | - Chengcheng Zhang
- Department of Social Medicine and Health Management, Xiangya School of Public Health, Central South University, Changsha, China; Department of Occupational and Environmental Health, Xiangya School of Public Health, Central South University, Changsha, China
| | - Xiping Yi
- Department of Occupational and Environmental Health, Xiangya School of Public Health, Central South University, Changsha, China
| | - Jian Guo
- Department of Occupational and Environmental Health, Xiangya School of Public Health, Central South University, Changsha, China
| | - Shuaishuai Xu
- Department of Occupational and Environmental Health, Xiangya School of Public Health, Central South University, Changsha, China
| | - Zhijun Huang
- Center of Clinical Pharmacology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Meian He
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xiang Chen
- Department of Dermatology, Xiangya Hospital, Central South University, Changsha, China.
| | - Dan Luo
- Department of Social Medicine and Health Management, Xiangya School of Public Health, Central South University, Changsha, China.
| | - Fei Yang
- Department of Occupational and Environmental Health, Xiangya School of Public Health, Central South University, Changsha, China; Hunan Province Key Laboratory of Typical Environmental Pollution and Health Hazards, School of Public Health, Hengyang Medical College, University of South China, Hengyang 421001, China.
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28
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Gade M, Comfort N, Re DB. Sex-specific neurotoxic effects of heavy metal pollutants: Epidemiological, experimental evidence and candidate mechanisms. ENVIRONMENTAL RESEARCH 2021; 201:111558. [PMID: 34224706 PMCID: PMC8478794 DOI: 10.1016/j.envres.2021.111558] [Citation(s) in RCA: 50] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 05/14/2021] [Accepted: 06/17/2021] [Indexed: 05/19/2023]
Abstract
The heavy metals lead (Pb), mercury (Hg), and cadmium (Cd) are ubiquitous environmental pollutants and are known to exert severe adverse impacts on the nervous system even at low concentrations. In contrast, the heavy metal manganese (Mn) is first and foremost an essential nutrient, but it becomes neurotoxic at high levels. Neurotoxic metals also include the less prevalent metalloid arsenic (As) which is found in excessive concentrations in drinking water and food sources in many regions of the world. Males and females often differ in how they respond to environmental exposures and adverse effects on their nervous systems are no exception. Here, we review the different types of sex-specific neurotoxic effects, such as cognitive and motor impairments, that have been attributed to Pb, Hg, Mn, Cd, and As exposure throughout the life course in epidemiological as well as in experimental toxicological studies. We also discuss differential vulnerability to these metals such as distinctions in behaviors and occupations across the sexes. Finally, we explore the different mechanisms hypothesized to account for sex-based differential susceptibility including hormonal, genetic, metabolic, anatomical, neurochemical, and epigenetic perturbations. An understanding of the sex-specific effects of environmental heavy metal neurotoxicity can aid in the development of more efficient systematic approaches in risk assessment and better exposure mitigation strategies with regard to sex-linked susceptibilities and vulnerabilities.
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Affiliation(s)
- Meethila Gade
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Nicole Comfort
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Diane B Re
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA; NIEHS Center of Northern Manhattan, Columbia University, New York, NY, USA; Motor Neuron Center for Biology and Disease, Columbia University, New York, NY, USA.
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29
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Bauer JA, White RF, Coull BA, Austin C, Oppini M, Zoni S, Fedrighi C, Cagna G, Placidi D, Guazzetti S, Yang Q, Bellinger DC, Webster TF, Wright RO, Smith D, Horton M, Lucchini RG, Arora M, Claus Henn B. Critical windows of susceptibility in the association between manganese and neurocognition in Italian adolescents living near ferro-manganese industry. Neurotoxicology 2021; 87:51-61. [PMID: 34478771 DOI: 10.1016/j.neuro.2021.08.014] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 06/07/2021] [Accepted: 08/28/2021] [Indexed: 10/20/2022]
Abstract
INTRODUCTION Understanding the neurodevelopmental effects of manganese (Mn) is complicated due to its essentiality for growth and development. While evidence exists for the harmful effects of excess Mn, pediatric epidemiologic studies have observed inconsistent associations between Mn and child cognition. OBJECTIVE We sought to estimate prospective associations between Mn measured in three different early-life time windows with adolescent cognition using deciduous teeth biomarkers. METHODS Deciduous teeth were collected from 195 participants (ages 10-14 years) of the Public Health Impact of Manganese Exposure (PHIME) study in Brescia, Italy. Measurements of tooth Mn represented prenatal (∼14 weeks gestation - birth), early postnatal (birth - 1.5 years) and childhood (∼1.5 - 6 years) time windows. Neuropsychologists administered the Wechsler Intelligence Scale for Children, 3rd edition (WISC-III), to obtain composite IQ and subtest scores. Associations between tooth Mn at each time window and adolescent WISC-III scores were estimated using multivariable linear regression. We tested differences in associations between Mn and outcomes across time windows using multiple informant models. Sex-specific associations were explored in stratified models. RESULTS Adjusted associations between tooth Mn and composite IQ scores were positive in the prenatal period and negative in the childhood period. Associations were strongest for subtest scores that reflect working memory, problem solving, visuospatial ability and attention: prenatal Mn was positively associated with Digits backward [SD change in score per interquartile range increase in Mn: β = 0.20 (95 % CI: 0.02, 0.38)] and Block design [β = 0.21 (0.01, 0.41)] and early postnatal Mn was positively associated with Digits forward [β = 0.24 (0.09, 0.40)], while childhood Mn was negatively associated with Coding [β = -0.14 (-0.28, -0.001)]. Sex-stratified analyses suggested different Mn-cognition associations for boys and girls and was also dependent on the time window of exposure. CONCLUSION Our results suggest that exposure timing is critical when evaluating Mn associations between Mn and cognition. Higher prenatal Mn was beneficial for adolescent cognition; however, these beneficial associations shifted towards harmful effects in later time windows. Cognitive domains most sensitive to Mn across time windows included visuospatial ability, working memory, attention and problem-solving.
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Affiliation(s)
- Julia Anglen Bauer
- Department of Environmental Health, Boston University School of Public Health, Boston, MA, USA.
| | - Roberta F White
- Department of Environmental Health, Boston University School of Public Health, Boston, MA, USA; Department of Neurology, Boston University School of Medicine, Boston, MA, USA
| | - Brent A Coull
- Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Christine Austin
- Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Manuela Oppini
- Department of Medical and Surgical Specialties, Radiological Sciences, and Public Health, University of Brescia, Italy
| | - Silvia Zoni
- Department of Medical and Surgical Specialties, Radiological Sciences, and Public Health, University of Brescia, Italy
| | - Chiara Fedrighi
- Department of Medical and Surgical Specialties, Radiological Sciences, and Public Health, University of Brescia, Italy
| | - Giuseppa Cagna
- Department of Medical and Surgical Specialties, Radiological Sciences, and Public Health, University of Brescia, Italy
| | - Donatella Placidi
- Department of Medical and Surgical Specialties, Radiological Sciences, and Public Health, University of Brescia, Italy
| | | | - Qiong Yang
- Department of Biostatistics, Boston University School of Public Health, Boston, MA, USA
| | - David C Bellinger
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA; Departments of Neurology and Psychiatry, Boston Children's Hospital, Boston, MA, USA; Departments of Neurology and Psychiatry, Harvard Medical School, Boston, MA, USA
| | - Thomas F Webster
- Department of Environmental Health, Boston University School of Public Health, Boston, MA, USA
| | - Robert O Wright
- Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Donald Smith
- Department of Microbiology and Environmental Toxicology, University of California, Santa Cruz, CA, USA
| | - Megan Horton
- Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Roberto G Lucchini
- Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA; Department of Medical and Surgical Specialties, Radiological Sciences, and Public Health, University of Brescia, Italy; School of Public Health, Florida International University, Miami, FL, USA
| | - Manish Arora
- Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Birgit Claus Henn
- Department of Environmental Health, Boston University School of Public Health, Boston, MA, USA
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Irizar A, Molinuevo A, Andiarena A, Jimeno-Romero A, San Román A, Broberg K, Llop S, Soler-Blasco R, Murcia M, Ballester F, Lertxundi A. Prenatal manganese serum levels and neurodevelopment at 4 years of age. ENVIRONMENTAL RESEARCH 2021; 197:111172. [PMID: 33857462 DOI: 10.1016/j.envres.2021.111172] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 04/02/2021] [Accepted: 04/08/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND The excess of manganese (Mn) causes severe deleterious effects in the central nervous system, and the developing brain is especially sensitive to Mn overload. However, results of prospective studies regarding Mn neurodevelopmental effects remain inconclusive. The present study aims at studying the association of prenatal Mn exposure and neurodevelopment at 4-5 years of age. METHODS Mn serum concentration was measured in 1465 pregnant women from the INMA (INfancia y MedioAmbiente, Environment and Childhood) Project. Neurodevelopment was assessed using a standardized version of the McCarthy Scales of Children's Abilities (MSCA). Multivariate regression models were used for data analysis. RESULTS No association was found between Mn levels in serum and any of the McCarthy scales. However, the stratification by sex showed a positive and beneficial association of prenatal Mn levels and the verbal, quantitative and general-cognitive scales in girls (β (95%CI): 4 (0.03, 7.96), 4.5 (0.43, 8.57) and 4.32 (0.6, 8.05), respectively). CONCLUSIONS A beneficial association was found for the first time between prenatal Mn levels measured in serum and neurodevelopment of female offspring at 4 years of age, which could have implications on public health policies, specifically on the establishment of policies promoting prenatal health related to dietary deficits of micronutrients such as Mn.
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Affiliation(s)
- Amaia Irizar
- Biodonostia Health Research Institute, Group of Environmental Epidemiology and Child Development, Paseo Doctor Begiristain s/n, 20014, San Sebastian, Spain; Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Instituto de Salud Carlos III, C/Monforte de Lemos 3-5, 28029, Madrid, Spain; Department of Preventive Medicine and Public Health, Faculty of Medicine, University of the Basque Country (UPV/EHU), 48940, Leioa, Spain; Department of Social Psychology and Methodology of Behavioral Sciences, Faculty of Psychology, University of the Basque Country (UPV/EHU), Avenida Tolosa 70, 20018, San Sebastian, Spain.
| | - Amaia Molinuevo
- Biodonostia Health Research Institute, Group of Environmental Epidemiology and Child Development, Paseo Doctor Begiristain s/n, 20014, San Sebastian, Spain
| | - Ainara Andiarena
- Biodonostia Health Research Institute, Group of Environmental Epidemiology and Child Development, Paseo Doctor Begiristain s/n, 20014, San Sebastian, Spain; Department of Social Psychology and Methodology of Behavioral Sciences, Faculty of Psychology, University of the Basque Country (UPV/EHU), Avenida Tolosa 70, 20018, San Sebastian, Spain
| | - Alba Jimeno-Romero
- Department of Preventive Medicine and Public Health, Faculty of Medicine, University of the Basque Country (UPV/EHU), 48940, Leioa, Spain
| | - Anne San Román
- Department of Analytical Chemistry, University of the Basque Country (UPV/EHU), Leioa, Basque Country, Spain; Research Centre for Experimental Marine Biology and Biotechnology, University of the Basque Country (PiE-UPV/EHU), Plentzia, Basque, Spain
| | - Karin Broberg
- Unit of Metals and Health, Institute of Environmental Medicine, Karolinska Institute, Stockholm, Sweden
| | - Sabrina Llop
- Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Instituto de Salud Carlos III, C/Monforte de Lemos 3-5, 28029, Madrid, Spain; Epidemiology and Environmental Health Joint Research Unit, FISABIO-Universitat Jaume I-Universitat de València, Valencia, Spain
| | - Raquel Soler-Blasco
- Epidemiology and Environmental Health Joint Research Unit, FISABIO-Universitat Jaume I-Universitat de València, Valencia, Spain
| | - Mario Murcia
- Epidemiology and Environmental Health Joint Research Unit, FISABIO-Universitat Jaume I-Universitat de València, Valencia, Spain; Health Information Systems Analysis Service, Conselleria de Sanitat, Generalitat Valenciana, Valencia, Spain
| | - Ferran Ballester
- Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Instituto de Salud Carlos III, C/Monforte de Lemos 3-5, 28029, Madrid, Spain; Epidemiology and Environmental Health Joint Research Unit, FISABIO-Universitat Jaume I-Universitat de València, Valencia, Spain; Department of Nursing, Universitat de València, Valencia, Spain
| | - Aitana Lertxundi
- Biodonostia Health Research Institute, Group of Environmental Epidemiology and Child Development, Paseo Doctor Begiristain s/n, 20014, San Sebastian, Spain; Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Instituto de Salud Carlos III, C/Monforte de Lemos 3-5, 28029, Madrid, Spain; Department of Preventive Medicine and Public Health, Faculty of Medicine, University of the Basque Country (UPV/EHU), 48940, Leioa, Spain
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Lamtai M, Azirar S, Zghari O, Ouakki S, El Hessni A, Mesfioui A, Ouichou A. Melatonin Ameliorates Cadmium-Induced Affective and Cognitive Impairments and Hippocampal Oxidative Stress in Rat. Biol Trace Elem Res 2021; 199:1445-1455. [PMID: 32613486 DOI: 10.1007/s12011-020-02247-z] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Accepted: 06/10/2020] [Indexed: 10/23/2022]
Abstract
The present work aims to evaluate the effect of melatonin (Mel) on affective and cognitive disorders induced by chronic exposure to Cadmium (Cd). Male and female Wistar rats received either an intraperitoneal injection of saline solution NaCl (0.9%), Mel (4 mg/kg), Cd (1 mg/kg), or Cd (1 mg/kg) + Mel (4 mg/kg) for 8 weeks. Behavioral disorders were evaluated by different tests mainly the open field and elevated plus maze tests for anxiety-like behavior, forced swimming test (FST) for depression-like behavior, and the Y-maze and Morris water maze (MWM) tests for cognitive disorders. Thereafter, oxidative stress indices and histology of the hippocampus were evaluated. The results confirm that Cd administration has anxiogenic-like effects in both anxiety tests and depressive-like effects in the FST and leads to memory and learning disabilities in the Y-maze and MWM. We also report that Mel counteracts these neurobehavioral disorders. Biochemical assays showed that rats intoxicated with Cd significantly increased levels of nitric oxide (NO) and lipid peroxidation (LPO), while the activities of catalase (CAT) and superoxide dismutase (SOD) were significantly decreased in the hippocampus. In contrast, Mel administration attenuates the Cd-induced changes. The histopathological studies in the hippocampus of rats also supported that Mel markedly reduced the Cd-induced neuronal loss in CA3 sub-region. Overall, our results suggest that Mel could be used to protect against Cd-induced neurobehavioral changes via its antioxidant properties in the hippocampus. The effects of Cd and Mel are sex-dependent, knowing that Cd is more harmful in males, while Mel is more protective in females.
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Affiliation(s)
- Mouloud Lamtai
- Laboratory of Genetics, Neuroendocrinology and Biotechnology, Faculty of Sciences, Ibn Tofail University, 133, 14000, Kenitra, BP, Morocco.
| | - Sofia Azirar
- Laboratory of Genetics, Neuroendocrinology and Biotechnology, Faculty of Sciences, Ibn Tofail University, 133, 14000, Kenitra, BP, Morocco
| | - Oussama Zghari
- Laboratory of Genetics, Neuroendocrinology and Biotechnology, Faculty of Sciences, Ibn Tofail University, 133, 14000, Kenitra, BP, Morocco
| | - Sihame Ouakki
- Laboratory of Genetics, Neuroendocrinology and Biotechnology, Faculty of Sciences, Ibn Tofail University, 133, 14000, Kenitra, BP, Morocco
| | - Aboubaker El Hessni
- Laboratory of Genetics, Neuroendocrinology and Biotechnology, Faculty of Sciences, Ibn Tofail University, 133, 14000, Kenitra, BP, Morocco
| | - Abdelhalem Mesfioui
- Laboratory of Genetics, Neuroendocrinology and Biotechnology, Faculty of Sciences, Ibn Tofail University, 133, 14000, Kenitra, BP, Morocco
| | - Ali Ouichou
- Laboratory of Genetics, Neuroendocrinology and Biotechnology, Faculty of Sciences, Ibn Tofail University, 133, 14000, Kenitra, BP, Morocco
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Liu H, Su L, Chen X, Wang S, Cheng Y, Lin S, Ding L, Liu J, Chen C, Unverzagt FW, Hake AM, Jin Y, Gao S. Higher blood cadmium level is associated with greater cognitive decline in rural Chinese adults aged 65 or older. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 756:144072. [PMID: 33280862 PMCID: PMC7775354 DOI: 10.1016/j.scitotenv.2020.144072] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 11/20/2020] [Accepted: 11/21/2020] [Indexed: 05/27/2023]
Abstract
Cadmium (Cd) exposure has been reported to have neurotoxic effects in animal studies and associated with increased Alzheimer's Disease mortality and lower cognitive function in cross-sectional and case-control studies. However, no results from longitudinal studies on Cd and cognitive decline are available. In this prospective cohort study, we recruited 1867 participants aged 65 years or older from rural areas in China, blood Cd and cognitive function were measured at baseline (2010-2012), and 1554 participants completed cognitive function tests during a 3-year follow-up (2013-2015). Cognitive function was evaluated using nine standardized cognitive tests: The Community Screening Instrument for Dementia, the CERAD Word List Learning, Word list recall, IU Story Recall, Animal Fluency Test, Boston Naming Test, Stick Design, Delayed Stick Design and the IU Token Test. Analysis of covariance models and logistic regression models were used to determine the association between Cd and standardized cognitive decline adjusting for covariates. The median blood Cd concentration of this study population was 2.12 μg/L, and the interquartile range was 1.42-4.64 μg/L. Significant association of higher Cd levels with lower cognitive scores were observed in five individual cognitive tests (Delayed Stick Design Test, Boston Naming Test, CERAD Word List Learning Test, Word List Recall Test and IU Story Recall Test) and the composite cognitive score adjusting for multi-covariates at baseline. Higher Cd levels were significantly associated with greater 3-year cognitive decline in Delayed Stick Design Test, Boston Naming Test, IU Token Test, Word List Recall Test and Composite cognitive score. For these cognitive tests, participants in the top two Cd quartile groups had significantly greater decline than those in the lowest Cd quartile group, while the two lowest Cd quartile groups were not significantly different. Our findings suggest that higher Cd exposure is associated with greater cognitive decline in older Chinese adults.
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Affiliation(s)
- Hang Liu
- China CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100050, China
| | - Liqin Su
- China CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100050, China.
| | - Xi Chen
- China CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100050, China
| | - Sisi Wang
- Center for Biostatistics, Bioinformatics and Big Data, School of Public Health, Zhejiang University School of Medicine, Hangzhou 310058, China
| | - Yibin Cheng
- China CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100050, China
| | - Shaobin Lin
- China CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100050, China
| | - Liang Ding
- China CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100050, China
| | - Jingyi Liu
- China CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100050, China
| | - Chen Chen
- China CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100050, China
| | - Frederick W Unverzagt
- Department of Psychiatry, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Ann M Hake
- Department of Neurology, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Yinlong Jin
- China CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100050, China
| | - Sujuan Gao
- Department of Biostatistics, Indiana University School of Medicine, Indianapolis, IN 46202-2872, USA
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Chandravanshi L, Shiv K, Kumar S. Developmental toxicity of cadmium in infants and children: a review. Environ Anal Health Toxicol 2021; 36:e2021003-0. [PMID: 33730790 PMCID: PMC8207007 DOI: 10.5620/eaht.2021003] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Accepted: 01/09/2021] [Indexed: 02/06/2023] Open
Abstract
Several millions of people are exposed to cadmium worldwide due to natural and anthropogenic activities that led to their widespread distribution in the environment and have shown potential adverse effects on the kidneys, liver, heart and nervous system. Recently human and animal-based studies have been shown that In utero and early life exposure to cadmium can have serious health issues that are related to the risk of developmental disabilities and other outcomes in adulthood. Since, cadmium crosses the placental barrier and reaches easily to the fetus, even moderate or high-level exposure of this metal during pregnancy could be of serious health consequences which might be reflected either in the children’s early or later stages of life. Mortality from various diseases including cancer, cardiovascular, respiratory, kidney and neurological problems, correlation with In utero or early life exposure to cadmium has been found in epidemiological studies. Animal studies with strong evidence of various diseases mostly support for the human studies, as well as suggested a myriad mechanism by which cadmium can interfere with human health and development. More studies are needed to establish the mechanism of cadmium-induced toxicity with environmentally relevant doses in childhood and later life. In this review, we provide a comprehensive examination of the literature addressing potential long- term health issues with In utero and early life exposure to cadmium, as well as correlating with human and animal exposure studies.
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Affiliation(s)
- Lalit Chandravanshi
- Department of Forensic Science, College and Traffic Management- Institute of Road and Traffic Education, Faridabad - Haryana - 121010, India
| | - Kunal Shiv
- Division of Forensic Science, School of Basic & Applied Sciences, Galgotias University Greater Noida - 201306, India
| | - Sudhir Kumar
- Forensic Science laboratory, Modinagar, Ghaziabad - 201204, India
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Guo J, Wu C, Zhang J, Li W, Lv S, Lu D, Qi X, Feng C, Liang W, Chang X, Zhang Y, Xu H, Cao Y, Wang G, Zhou Z. Prenatal exposure to multiple phenolic compounds, fetal reproductive hormones, and the second to fourth digit ratio of children aged 10 years in a prospective birth cohort. CHEMOSPHERE 2021; 263:127877. [PMID: 32835969 DOI: 10.1016/j.chemosphere.2020.127877] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 07/25/2020] [Accepted: 07/29/2020] [Indexed: 06/11/2023]
Abstract
Select phenols are known to possess hormone-disrupting properties, but no previous study has addressed the potential effects of prenatal exposure to phenol mixtures on fetal reproductive hormones and children's second to fourth digit (2D: 4D) ratio, a marker for in utero testosterone (T) exposure. We aimed to explore interrelations of prenatal phenol exposures individually and in mixtures, cord serum reproductive hormones, and 2D: 4D ratio of children aged 10 years. Urinary 11 phenol concentrations were determined from 392 pregnant women participating in a longitudinal birth cohort. We estimated associations of prenatal phenol exposures individually and in mixtures with cord reproductive hormones and children's 2D:4D ratio using three statistical approaches, including generalized linear models (GLMs), elastic net regression (ENR) models and Bayesian kernel machine regression (BKMR) models. In female newborns, the three models showed that maternal triclosan (TCS) concentrations were significantly negatively associated with cord serum T levels [regression coefficient (β) = -0.076, 95% confidence interval (CI): 0.138, -0.013; p = 0.018]. Additionally, maternal urinary bisphenol A (BPA) levels were related to decreases in 2D:4D ratio of the left hand in girls by GLMs (β = -0.003, 95% CI: 0.007, -0.001; p = 0.024) and ENR models, but not BKMR models. We provided evidence that prenatal TCS exposure predicted lower cord serum T levels, and maternal BPA exposure was related to decreased 2D:4D ratio of the left hand in females.
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Affiliation(s)
- Jianqiu Guo
- School of Public Health/Key Laboratory of Public Health Safety of Ministry of Education/Key Lab of Health Technology Assessment, National Health Commission of the People's Republic of China, Fudan University, No.130 Dong'an Road, Shanghai, 200032, China
| | - Chunhua Wu
- School of Public Health/Key Laboratory of Public Health Safety of Ministry of Education/Key Lab of Health Technology Assessment, National Health Commission of the People's Republic of China, Fudan University, No.130 Dong'an Road, Shanghai, 200032, China.
| | - Jiming Zhang
- School of Public Health/Key Laboratory of Public Health Safety of Ministry of Education/Key Lab of Health Technology Assessment, National Health Commission of the People's Republic of China, Fudan University, No.130 Dong'an Road, Shanghai, 200032, China
| | - Wenting Li
- School of Public Health/Key Laboratory of Public Health Safety of Ministry of Education/Key Lab of Health Technology Assessment, National Health Commission of the People's Republic of China, Fudan University, No.130 Dong'an Road, Shanghai, 200032, China
| | - Shenliang Lv
- School of Public Health/Key Laboratory of Public Health Safety of Ministry of Education/Key Lab of Health Technology Assessment, National Health Commission of the People's Republic of China, Fudan University, No.130 Dong'an Road, Shanghai, 200032, China
| | - Dasheng Lu
- Shanghai Municipal Center for Disease Control and Prevention, No. 1380 Zhongshan West Road, Shanghai, 200336, China
| | - Xiaojuan Qi
- Zhejiang Provincial Center for Disease Control and Prevention, No. 3399 Binsheng Road, Hangzhou, 310051, China
| | - Chao Feng
- Shanghai Municipal Center for Disease Control and Prevention, No. 1380 Zhongshan West Road, Shanghai, 200336, China
| | - Weijiu Liang
- Changning District Center for Disease Control and Prevention, No.39 Yunwushan Road, Shanghai, 200051, China
| | - Xiuli Chang
- School of Public Health/Key Laboratory of Public Health Safety of Ministry of Education/Key Lab of Health Technology Assessment, National Health Commission of the People's Republic of China, Fudan University, No.130 Dong'an Road, Shanghai, 200032, China
| | - Yubin Zhang
- School of Public Health/Key Laboratory of Public Health Safety of Ministry of Education/Key Lab of Health Technology Assessment, National Health Commission of the People's Republic of China, Fudan University, No.130 Dong'an Road, Shanghai, 200032, China
| | - Hao Xu
- Changning District Center for Disease Control and Prevention, No.39 Yunwushan Road, Shanghai, 200051, China
| | - Yang Cao
- Clinical Epidemiology and Biostatistics, School of Medical Sciences, Örebro University, Örebro, 70182, Sweden
| | - Guoquan Wang
- Shanghai Municipal Center for Disease Control and Prevention, No. 1380 Zhongshan West Road, Shanghai, 200336, China
| | - Zhijun Zhou
- School of Public Health/Key Laboratory of Public Health Safety of Ministry of Education/Key Lab of Health Technology Assessment, National Health Commission of the People's Republic of China, Fudan University, No.130 Dong'an Road, Shanghai, 200032, China.
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Bauer JA, Fruh V, Howe CG, White RF, Henn BC. Associations of metals and neurodevelopment: a review of recent evidence on susceptibility factors. CURR EPIDEMIOL REP 2020; 7:237-262. [PMID: 33777647 PMCID: PMC7993302 DOI: 10.1007/s40471-020-00249-y] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/21/2020] [Indexed: 12/22/2022]
Abstract
PURPOSE OF REVIEW Epidemiologic evidence exists that many metals are associated with adverse neurobehavioral effects in young children, including lead (Pb), methylmercury (meHg), manganese (Mn) and arsenic (As)5-8. Importantly, chemical insult can vary depending on host factors and exposure circumstance. This systematic review summarizes the recent literature investigating modifying factors of the associations between metals and neurodevelopment, including immutable traits (sex or genetics) or exposure conditions (timing or co-exposures). RECENT FINDINGS Of the 53 studies included in this review, the number investigating modification of exposure effects were: 30 for sex, 21 for co-exposures, 12 for timing of exposure, and six for genetic modifiers. Sex-specific effects of metal-neurobehavioral associations were inconclusive for all metals, likely due to the heterogeneity of outcome domains assessed and the exposure time points measured. Seven studies evaluated both sex and exposure timing as modifying factors using deciduous teeth or other biomarkers with repeated measures to characterize metals exposure over time. Only five studies used statistical methods for mixtures to evaluate associations of more than two metals with neurobehavioral domains. SUMMARY Despite the expansion of research on susceptibility to the neurodevelopmental effects of metals exposure, considerable gaps remain. This work remains critical, as characterizing susceptible subpopulations can aid in identifying biological mechanisms and is fundamental for the protection of public health.
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Affiliation(s)
- Julia A Bauer
- Department of Environmental Health, Boston University School of Public Health, Boston, MA, USA
- Department of Epidemiology, Geisel School of Medicine, Dartmouth College, Lebanon, NH, USA
| | - Victoria Fruh
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Caitlin G Howe
- Department of Epidemiology, Geisel School of Medicine, Dartmouth College, Lebanon, NH, USA
- Department of Preventive Medicine, University of Southern California, Los Angeles, CA, USA
| | - Roberta F White
- Department of Environmental Health, Boston University School of Public Health, Boston, MA, USA
- Department of Neurology, Boston University Medical School, Boston, MA, USA
| | - Birgit Claus Henn
- Department of Environmental Health, Boston University School of Public Health, Boston, MA, USA
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Zhang J, Guo J, Wu C, Qi X, Jiang S, Zhou T, Xiao H, Li W, Lu D, Feng C, Liang W, Chang X, Zhang Y, Cao Y, Wang G, Zhou Z. Early-life carbamate exposure and intelligence quotient of seven-year-old children. ENVIRONMENT INTERNATIONAL 2020; 145:106105. [PMID: 32919260 DOI: 10.1016/j.envint.2020.106105] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2020] [Revised: 08/28/2020] [Accepted: 08/28/2020] [Indexed: 05/25/2023]
Abstract
BACKGROUND Early-life carbamate exposure during developmental period has been linked with adverse health effects and attracted attention. METHODS Three hundred and three children at age of seven were included in the current study. Urinary carbofuranphenol concentrations were measured using gas chromatography-tandem mass spectrometry. Verbal, performance and full-scale intelligence quotients (IQV, IQP, and IQFS) were assessed using Wechsler Intelligence Scale for Children-Chinese Revised. Generalized linear models were used to explore the associations between carbofuranphenol levels and IQs. Generalized estimating equations were used to explore long-term health effect and sensitive time window. RESULTS Carbofuranphenol was detected in 96.6% of the seven-year-old urinary samples, the geometric mean, median, and inter quartile range of the carbofuranphenol concentrations were 0.67 μg/L, 0.30 μg/L, and 0.09-3.72 μg/L, respectively, which were similar with the level of three-year-old children from the SMBCS cohort. Seven-year-old carbofuranphenol level was negatively associated with IQP [β = -0.044; 95% confidence interval (CI): -0.087, -0.001; p = 0.045]. Three-year-old carbofuranphenol level was negatively associated with IQP (β = -0.100; 95% CI: -0.186, -0.014; p = 0.022) and IQFS (β = -0.087; 95% CI: -0.173, -0.001; p = 0.047). Carbamate exposure of maternal and children at both three and seven years old had negative associations with IQP (β = -0.089; 95% CI: -0.171, -0.007; p = 0.034), and IQFS (β = -0.064; 95% CI: -0.127, -0.000; p = 0.049) of children at age of seven. CONCLUSION Results of the present study verify that children in an agricultural region of China were widely exposed to carbamate pesticides. Carbamate exposure in utero and at three and seven years may adversely impact children's neurodevelopment.
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Affiliation(s)
- Jiming Zhang
- School of Public Health/Key Laboratory of Public Health Safety of Ministry of Education/Key Lab of Health Technology Assessment, National Health Commission of the People's Republic of China, Fudan University, No.130 Dong'an Road, Shanghai 200032, China
| | - Jianqiu Guo
- School of Public Health/Key Laboratory of Public Health Safety of Ministry of Education/Key Lab of Health Technology Assessment, National Health Commission of the People's Republic of China, Fudan University, No.130 Dong'an Road, Shanghai 200032, China
| | - Chunhua Wu
- School of Public Health/Key Laboratory of Public Health Safety of Ministry of Education/Key Lab of Health Technology Assessment, National Health Commission of the People's Republic of China, Fudan University, No.130 Dong'an Road, Shanghai 200032, China
| | - Xiaojuan Qi
- School of Public Health/Key Laboratory of Public Health Safety of Ministry of Education/Key Lab of Health Technology Assessment, National Health Commission of the People's Republic of China, Fudan University, No.130 Dong'an Road, Shanghai 200032, China; Zhejiang Provincial Center for Disease Control and Prevention, No.3399 Binsheng Road, Hangzhou 310051, China
| | - Shuai Jiang
- School of Public Health/Key Laboratory of Public Health Safety of Ministry of Education/Key Lab of Health Technology Assessment, National Health Commission of the People's Republic of China, Fudan University, No.130 Dong'an Road, Shanghai 200032, China
| | - Tong Zhou
- School of Public Health/Key Laboratory of Public Health Safety of Ministry of Education/Key Lab of Health Technology Assessment, National Health Commission of the People's Republic of China, Fudan University, No.130 Dong'an Road, Shanghai 200032, China
| | - Hongxi Xiao
- School of Public Health/Key Laboratory of Public Health Safety of Ministry of Education/Key Lab of Health Technology Assessment, National Health Commission of the People's Republic of China, Fudan University, No.130 Dong'an Road, Shanghai 200032, China
| | - Wenting Li
- School of Public Health/Key Laboratory of Public Health Safety of Ministry of Education/Key Lab of Health Technology Assessment, National Health Commission of the People's Republic of China, Fudan University, No.130 Dong'an Road, Shanghai 200032, China
| | - Dasheng Lu
- Shanghai Center for Disease Control and Prevention, No.1380 West Zhongshan Road, Shanghai 200336, China
| | - Chao Feng
- Shanghai Center for Disease Control and Prevention, No.1380 West Zhongshan Road, Shanghai 200336, China
| | - Weijiu Liang
- Changning District Center for Disease Control and Prevention, No.39 Yunwushan Road, Shanghai 200051, China
| | - Xiuli Chang
- School of Public Health/Key Laboratory of Public Health Safety of Ministry of Education/Key Lab of Health Technology Assessment, National Health Commission of the People's Republic of China, Fudan University, No.130 Dong'an Road, Shanghai 200032, China
| | - Yubin Zhang
- School of Public Health/Key Laboratory of Public Health Safety of Ministry of Education/Key Lab of Health Technology Assessment, National Health Commission of the People's Republic of China, Fudan University, No.130 Dong'an Road, Shanghai 200032, China
| | - Yang Cao
- Clinical Epidemiology and Biostatistics, School of Medical Sciences, Örebro University, Örebro 70182, Sweden
| | - Guoquan Wang
- Shanghai Center for Disease Control and Prevention, No.1380 West Zhongshan Road, Shanghai 200336, China
| | - Zhijun Zhou
- School of Public Health/Key Laboratory of Public Health Safety of Ministry of Education/Key Lab of Health Technology Assessment, National Health Commission of the People's Republic of China, Fudan University, No.130 Dong'an Road, Shanghai 200032, China.
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Liu W, Xin Y, Li Q, Shang Y, Ping Z, Min J, Cahill CM, Rogers JT, Wang F. Biomarkers of environmental manganese exposure and associations with childhood neurodevelopment: a systematic review and meta-analysis. Environ Health 2020; 19:104. [PMID: 33008482 PMCID: PMC7531154 DOI: 10.1186/s12940-020-00659-x] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Accepted: 09/22/2020] [Indexed: 05/17/2023]
Abstract
BACKGROUND Although prior studies showed a correlation between environmental manganese (Mn) exposure and neurodevelopmental disorders in children, the results have been inconclusive. There has yet been no consistent biomarker of environmental Mn exposure. Here, we summarized studies that investigated associations between manganese in biomarkers and childhood neurodevelopment and suggest a reliable biomarker. METHODS We searched PubMed and Web of Science for potentially relevant articles published until December 31th 2019 in English. We also conducted a meta-analysis to quantify the effects of manganese exposure on Intelligence Quotient (IQ) and the correlations of manganese in different indicators. RESULTS Of 1754 citations identified, 55 studies with 13,388 subjects were included. Evidence from cohort studies found that higher manganese exposure had a negative effect on neurodevelopment, mostly influencing cognitive and motor skills in children under 6 years of age, as indicated by various metrics. Results from cross-sectional studies revealed that elevated Mn in hair (H-Mn) and drinking water (W-Mn), but not blood (B-Mn) or teeth (T-Mn), were associated with poorer cognitive and behavioral performance in children aged 6-18 years old. Of these cross-sectional studies, most papers reported that the mean of H-Mn was more than 0.55 μg/g. The meta-analysis concerning H-Mn suggested that a 10-fold increase in hair manganese was associated with a decrease of 2.51 points (95% confidence interval (CI), - 4.58, - 0.45) in Full Scale IQ, while the meta-analysis of B-Mn and W-Mn generated no such significant effects. The pooled correlation analysis revealed that H-Mn showed a more consistent correlation with W-Mn than B-Mn. Results regarding sex differences of manganese associations were inconsistent, although the preliminary meta-analysis found that higher W-Mn was associated with better Performance IQ only in boys, at a relatively low water manganese concentrations (most below 50 μg/L). CONCLUSIONS Higher manganese exposure is adversely associated with childhood neurodevelopment. Hair is the most reliable indicator of manganese exposure for children at 6-18 years of age. Analysis of the publications demonstrated sex differences in neurodevelopment upon manganese exposure, although a clear pattern has not yet been elucidated for this facet of our study.
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Affiliation(s)
- Weiwei Liu
- Department of Nutrition, Precision Nutrition Innovation Center, School of Public Health, Zhengzhou University, Zhengzhou, China
| | - Yongjuan Xin
- Department of Nutrition, Precision Nutrition Innovation Center, School of Public Health, Zhengzhou University, Zhengzhou, China
| | - Qianwen Li
- Department of Nutrition, Precision Nutrition Innovation Center, School of Public Health, Zhengzhou University, Zhengzhou, China
| | - Yanna Shang
- Department of Nutrition, Precision Nutrition Innovation Center, School of Public Health, Zhengzhou University, Zhengzhou, China
| | - Zhiguang Ping
- Department of Nutrition, Precision Nutrition Innovation Center, School of Public Health, Zhengzhou University, Zhengzhou, China
| | - Junxia Min
- The First Affiliated Hospital, School of Public Health, Institute of Translational Medicine, Zhejiang University School of Medicine, Hangzhou, China
| | - Catherine M. Cahill
- Neurochemistry Laboratory, Department of Psychiatry-Neuroscience, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA USA
| | - Jack T. Rogers
- Neurochemistry Laboratory, Department of Psychiatry-Neuroscience, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA USA
| | - Fudi Wang
- Department of Nutrition, Precision Nutrition Innovation Center, School of Public Health, Zhengzhou University, Zhengzhou, China
- The First Affiliated Hospital, School of Public Health, Institute of Translational Medicine, Zhejiang University School of Medicine, Hangzhou, China
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Tatsuta N, Nakai K, Kasanuma Y, Iwai-Shimada M, Sakamoto M, Murata K, Satoh H. Prenatal and postnatal lead exposures and intellectual development among 12-year-old Japanese children. ENVIRONMENTAL RESEARCH 2020; 189:109844. [PMID: 32678746 DOI: 10.1016/j.envres.2020.109844] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 06/16/2020] [Accepted: 06/16/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Low-level lead exposure during childhood is associated with deficit in child IQ. However, the association between prenatal lead exposure and child IQ remains inconsistent. The objective of our study was to examine the association between prenatal/postnatal lead exposure and child IQ at the age of 12. METHODS We obtained data pertaining to cord-blood and child-blood lead levels and IQ for 286 children from a prospective birth cohort study (Tohoku Study of Child Development). IQ was assessed using the Wechsler Intelligence Scale for Children-Fourth Edition. Simultaneously, the Boston Naming Test (BNT) was used to assess the children's language ability. RESULTS The median lead level in the cord blood was 0.8 μg/dL (5th-95th percentiles, 0.4-1.4 μg/dL), and that in the blood of 12-year-old children was 0.7 μg/dL (0.4-1.1 μg/dL). IQ and BNT scores were significantly lower in boys than in girls; therefore, multiple regression analysis was conducted separately for boys and girls. Among boys, IQ was associated with child-blood lead (B = -16.362, p = 0.033) but not cord-blood lead (B = -6.844, p = 0.309). When boys were divided into four groups according to the child-blood lead levels, there was a significant decreasing trend for IQ. The score with cues of the BNT was associated with both cord-blood (B = -5.893, p = 0.025) and child-blood (B = -7.108, p = 0.022) lead concentrations in boys. Among girls, there was no significant association of the outcomes with cord-blood or child-blood lead level. CONCLUSIONS These findings suggest that postnatal lead exposure adversely affects the intellectual ability in boys. Furthermore, the language ability is sensitive to prenatal/postnatal lead exposure in boys.
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Affiliation(s)
- Nozomi Tatsuta
- Development and Environmental Medicine, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan
| | - Kunihiko Nakai
- Development and Environmental Medicine, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan.
| | - Yuichi Kasanuma
- Kesen-numa City Hospital, Kesen-numa 988-0181, Japan; Minami-Kesennuma Medical Clinic 988-0025, Japan
| | - Miyuki Iwai-Shimada
- Centre for Health and Environmental Risk Research, National Institute for Environmental Studies, Tsukuba 305-8506, Japan
| | - Mineshi Sakamoto
- Development and Environmental Medicine, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan
| | - Katsuyuki Murata
- Akita University Graduate School of Medicine, Akita 010-8543, Japan
| | - Hiroshi Satoh
- Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan
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Li C, Xia W, Jiang Y, Liu W, Zhang B, Xu S, Li Y. Low level prenatal exposure to a mixture of Sr, Se and Mn and neurocognitive development of 2-year-old children. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 735:139403. [PMID: 32473430 DOI: 10.1016/j.scitotenv.2020.139403] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 04/24/2020] [Accepted: 05/11/2020] [Indexed: 06/11/2023]
Abstract
The excess or deficiency of trace metals can cause adverse neurocognitive development. Evidence of health effect of trace metal mixtures on neurocognitive development is limited in children. We evaluated associations of prenatal exposure to trace metals and metal mixtures with neurocognitive development of 2-year-old children. A total of 544 mother-child pairs were included in the study. The concentrations of 10 trace metals in maternal urine were monitored before delivery. Neurocognitive development indexes, including mental development index (MDI) and psychomotor development index (PDI), were assessed using the Bayley Scales of Infant Development. Linear regression analysis was performed to explore the effects of single-metal and multi-metal exposures. Bayesian Kernel Machine regression (BKMR) was used to investigate overall effect of exposure to metal mixtures and potential interactions among mixture components. We found positive associations of urinary strontium (Sr) and Selenium (Se) levels with MDI scores among all children in the single-metal model. Sr was positively related to MDI, while Manganese (Mn) was negatively associated with PDI in the multi-metal model. The results from BKMR model in girls revealed that MDI scores were improved with the increasing concentrations of Sr, Se and Mn mixture until the concentrations reached their 30th percentiles (Sr: 149.49 μg/g creatinine, Se:18.38 μg/g creatinine, Mn:1.96 μg/g creatinine), with no effect after that threshold level. Sr played a positive role in mental development among mixture components, which was consistent with the results of Sr in the multi-metal models. No signification association of mixture with MDI/PDI was found in boys. The study suggested potential sex-specific association of Sr, Se and Mn mixture levels (at or below their 30th percentiles) with improved mental development, and beneficial role of Sr.
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Affiliation(s)
- Chunhui Li
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, State Key Laboratory of Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, People's Republic of China
| | - Wei Xia
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, State Key Laboratory of Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, People's Republic of China
| | - Yangqian Jiang
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, State Key Laboratory of Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, People's Republic of China
| | - Wenyu Liu
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, State Key Laboratory of Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, People's Republic of China
| | - Bin Zhang
- Wuhan Women and Children Medical Care Center, Wuhan, Hubei, People's Republic of China
| | - Shunqing Xu
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, State Key Laboratory of Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, People's Republic of China
| | - Yuanyuan Li
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, State Key Laboratory of Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, People's Republic of China.
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Wang H, Matsushita MT, Zhang L, Abel GM, Mommer BC, Huddy TF, Storm DR, Xia Z. Inducible and Conditional Stimulation of Adult Hippocampal Neurogenesis Rescues Cadmium-Induced Impairments of Adult Hippocampal Neurogenesis and Hippocampus-Dependent Memory in Mice. Toxicol Sci 2020; 177:263-280. [PMID: 32617577 PMCID: PMC7553705 DOI: 10.1093/toxsci/kfaa104] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Cadmium (Cd) is a heavy metal and an environmental pollutant. However, the full spectrum of its neurotoxicity and the underlying mechanisms are not completely understood. Our previous studies demonstrated that Cd exposure impairs adult hippocampal neurogenesis and hippocampus-dependent memory in mice. This study aims to determine if these adverse effects of Cd exposure can be mitigated by genetically and conditionally enhancing adult neurogenesis. To address this issue, we utilized the transgenic constitutive active MEK5 (caMEK5) mouse strain we previously developed and characterized. This mouse strain enables us to genetically and conditionally activate adult neurogenesis by administering tamoxifen to induce expression of a caMEK5 in adult neural stem/progenitor cells, which stimulates adult neurogenesis through activation of the endogenous extracellular signal-regulated kinase 5 mitogen-activated protein kinase pathway. The caMEK5 mice were exposed to 0.6 mg/l Cd through drinking water for 38 weeks. Once impairment of memory was confirmed, tamoxifen was administered to induce caMEK5 expression and to activate adult neurogenesis. Behavior tests were conducted at various time points to monitor hippocampus-dependent memory. Upon completion of the behavior tests, brain tissues were collected for cellular studies of adult hippocampal neurogenesis. We report here that Cd impaired hippocampus-dependent spatial memory and contextual fear memory in mice. These deficits were rescued by the tamoxifen induction of caMEK5 expression. Furthermore, Cd inhibition of adult hippocampal neurogenesis was also reversed. This rescue experiment provides strong evidence for a direct link between Cd-induced impairments of adult hippocampal neurogenesis and hippocampus-dependent memory.
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Affiliation(s)
- Hao Wang
- Toxicology Program, Department of Environmental and Occupational Health Sciences
| | - Megumi T Matsushita
- Toxicology Program, Department of Environmental and Occupational Health Sciences
| | - Liang Zhang
- Toxicology Program, Department of Environmental and Occupational Health Sciences
| | - Glen M Abel
- Toxicology Program, Department of Environmental and Occupational Health Sciences
| | - Brett C Mommer
- Toxicology Program, Department of Environmental and Occupational Health Sciences
| | | | - Daniel R Storm
- Department of Pharmacology, University of Washington, Seattle, Washington 98195
| | - Zhengui Xia
- Toxicology Program, Department of Environmental and Occupational Health Sciences
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Tinkov AA, Mazaletskaya AL, Ajsuvakova OP, Bjørklund G, Huang PT, Chernova LN, Skalny AA, Skalny AV. ICP-MS Assessment of Hair Essential Trace Elements and Minerals in Russian Preschool and Primary School Children with Attention-Deficit/Hyperactivity Disorder (ADHD). Biol Trace Elem Res 2020; 196:400-409. [PMID: 31691190 DOI: 10.1007/s12011-019-01947-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Accepted: 10/18/2019] [Indexed: 12/15/2022]
Abstract
The objective of the present study was to investigate the relationship between hair essential trace element and mineral content and ADHD in preschool (4-6 years old) and primary school children (6-10 years old) in relation to age and gender. Hair essential trace element and mineral content in 90 Russian children with ADHD and 90 age- and gender-matched neurotypical controls were assessed using inductively coupled plasma mass-spectrometry after microwave digestion. The obtained data demonstrate that hair Co, Cu, Mn, Si, and Zn contents in ADHD children was significantly reduced by 18%, 10%, 27%, 16%, and 19% as compared to the control values, respectively. The most significant decrease in children with ADHD was observed for hair Mg levels, being 29% lower than those in neurotypical children. After adjustment for age and gender, the observed difference in hair element content was more characteristic for preschool children and girls, respectively. Multiple linear regression analysis demonstrated that in a crude model (hair element levels as predictors), only hair Zn content was significantly inversely associated with ADHD (β = - 0.169; p = 0.025). Adjustment for anthropometric parameters (model 2) did not increase the predictive ability of the model, although it improved the association between hair Zn and ADHD in children (β = - 0.194; p = 0.014). Hypothetically, the observed alterations may at least partially contribute to neurobehavioral disturbances in children with ADHD. Moreover, the results of the present study raise the question about the potential benefits of Zn and Mg supplementation in children with ADHD. However, further detailed studies are required to investigate micronutrient deficiencies in ADHD.
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Affiliation(s)
- Alexey A Tinkov
- Yaroslavl State University, Yaroslavl, Russia, 150003.
- IM Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia, 119146.
- RUDN University, Moscow, Russia.
| | | | - Olga P Ajsuvakova
- Yaroslavl State University, Yaroslavl, Russia, 150003
- IM Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia, 119146
- RUDN University, Moscow, Russia
| | - Geir Bjørklund
- Council for Nutritional and Environmental Medicine, Mo i Rana, Norway
| | | | | | - Andrey A Skalny
- Yaroslavl State University, Yaroslavl, Russia, 150003
- RUDN University, Moscow, Russia
| | - Anatoly V Skalny
- IM Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia, 119146
- RUDN University, Moscow, Russia
- Federal Scientific Center of Biological Systems and Agrotechnologies of the Russian Academy of Sciences, Orenburg, Russia, 460000
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Xue Q, Zhou Y, Gu H, Xie X, Hou F, Liu Q, Wu H, Zhu K, Wan Z, Song R. Urine metals concentrations and dyslexia among children in China. ENVIRONMENT INTERNATIONAL 2020; 139:105707. [PMID: 32289584 DOI: 10.1016/j.envint.2020.105707] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 03/05/2020] [Accepted: 03/30/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Exposures to heavy metals has been linked to many developmental disorders. However, few studies have investigated the effects of exposure and co-exposure to metals on dyslexia, especially with regard to dyslexics in China. OBJECTIVES To investigate the association between urine metal concentrations and dyslexia in a case-control study among children in China. METHODS A case-control study was conducted in the Tongji Reading Environment and Dyslexia (READ) research program. A total of 228 dyslexics and 228 controls were matched on gender, age (within one year), and grade. The concentrations of 21 urine metals were measured by an inductively coupled plasma-mass spectrometer (ICP-MS). Multivariable conditional logistic regression models were applied to estimate the adjusted odds ratios (ORs) of Chinese dyslexia. RESULTS After adjusting for potential confounders, two metals (selenium and argentum) were significantly associated with dyslexia in single-metal multivariable models. Argentum was positively associated with the risk of dyslexia, while selenium was negatively associated. In the multiple-metal model, compared with extreme quartiles, the ORs (95% CIs) for selenium was 0.36 (95% CI: 0.14-0.93; Ptrend = 0.029). In the joint association analysis, children with higher levels of urine argentum and lower level of urine selenium had a significantly higher risk of dyslexia than those with low levels of argentum and selenium (OR = 5.06, 95% CI: 1.67-18.84). CONCLUSIONS The findings suggest that exposure to selenium and argentum may relate to dyslexia in China. Longitudinal studies are needed to further evaluate these relationships and investigate potential mechanisms.
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Affiliation(s)
- Qi Xue
- Department of Maternal and Child Health, and the Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Yu Zhou
- Department of Maternal and Child Health, and the Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Huaiting Gu
- Department of Maternal and Child Health, and the Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Xinyan Xie
- Department of Maternal and Child Health, and the Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Fang Hou
- Department of Maternal and Child Health, and the Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Qi Liu
- Department of Maternal and Child Health, and the Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Hao Wu
- Department of Maternal and Child Health, and the Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Kaiheng Zhu
- Department of Maternal and Child Health, and the Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Zihao Wan
- Department of Maternal and Child Health, and the Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Ranran Song
- Department of Maternal and Child Health, and the Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
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Dórea JG. Environmental exposure to low-level lead (Pb) co-occurring with other neurotoxicants in early life and neurodevelopment of children. ENVIRONMENTAL RESEARCH 2019; 177:108641. [PMID: 31421445 DOI: 10.1016/j.envres.2019.108641] [Citation(s) in RCA: 108] [Impact Index Per Article: 21.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2019] [Revised: 08/08/2019] [Accepted: 08/08/2019] [Indexed: 06/10/2023]
Abstract
Lead (Pb) is a worldwide environmental contaminant that even at low levels influences brain development and affects neurobehavior later in life; nevertheless it is only a small fraction of the neurotoxicant (NT) exposome. Exposure to environmental Pb concurrent with other NT substances is often the norm, but their joint effects are challenging to study during early life. The aim of this review is to integrate studies of Pb-containing NT mixtures during the early life and neurodevelopment outcomes of children. The Pb-containing NT mixtures that have been most studied involve other metals (Mn, Al, Hg, Cd), metalloids (As), halogen (F), and organo-halogen pollutants. Co-occurring Pb-associated exposures during pregnancy and lactation depend on the environmental sources and the metabolism and half-life of the specific NT contaminant; but offspring neurobehavioral outcomes are also influenced by social stressors. Nevertheless, Pb-associated effects from prenatal exposure portend a continued burden on measurable neurodevelopment; they thus favor increased neurological health issues, decrements in neurobehavioral tests and reductions in the quality of life. Neurobehavioral test outcomes measured in the first 1000 days showed Pb-associated negative outcomes were frequently noticed in infants (<6 months). In older (preschool and school) children studies showed more variations in NT mixtures, children's age, and sensitivity and/or specificity of neurobehavioral tests; these variations and choice of statistical model (individual NT stressor or collective effect of mixture) may explain inconsistencies. Multiple exposures to NT mixtures in children diagnosed with 'autism spectrum disorders' (ASD) and 'attention deficit and hyperactivity disorders' (ADHD), strongly suggest a Pb-associated effect. Mixture potency (number or associated NT components and respective concentrations) and time (duration and developmental stage) of exposure often showed a measurable impact on neurodevelopment; however, net effects, reversibility and/or predictability of delays are insufficiently studied and need urgent attention. Nevertheless, neurodevelopment delays can be prevented and/or attenuated if public health policies are implemented to protect the unborn and the young child.
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Affiliation(s)
- José G Dórea
- Universidade de Brasília, Brasília, 70919-970, DF, Brazil.
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