Abstract
Autism spectrum disorder (ASD) is a type of neurodevelopmental disorder characterized mainly by qualitative deficiencies in social communication skills, accompanied by repetitive and restricted behavior patterns. This study was conducted to investigate the associations between the risk of ASD development in children and exposure to trace elements (arsenic (As), cadmium (Cd), chromium (Cr), cobalt (Co), copper (Cu), lead (Pb), nickel (Ni), and zinc (Zn)). Two groups of children, including 44 ASD and 35 typically developing (TD) children, were selected, and their fasting urine samples were obtained. The concentration levels of trace elements were assayed using ICP-MS. The results showed that as compared to the TD group, the concentration levels of As (p = 0.002) and Pb (p < 0.001) and also Cr (p < 0.001), Cu (p = 0.001), and Ni (p < 0.001) were significantly higher among ASD children. In terms of gender, boys with ASD showed elevated levels of Cr, Cu, Ni, and Pb, whereas the urine levels of As, Cr, Cu, Ni, and Pb were markedly higher among girls when compared to the non-ASD children. Under the logistic regression model, the risk difference for As, Co, Cr, Cu, Ni, Pb, and Zn remained significant when adjustment was applied for age and gender confounders.
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Acknowledgements
We would like to acknowledge the assistance of the Medical Toxicology and Drug Abuse Research Center (MTDRC) and also Clinical Research Development Unit of Imam Reza Hospital at the Birjand University of Medical Sciences. Special thanks to Dr. Lukasz J. Binkowski and Dr. Martyna Błaszczyk for their assistance in improving the manuscript. In addition, our sincere appreciation goes to all patients who participated in this study.
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The datasets used and/or analyzed during the current research are available from the corresponding author on request.
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This study was supported by the Birjand University of Medical Sciences (Grant number: 1398.4868).
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MR and BM were the overall coordinators. MR, AR, AE, SN, NA, and BM contributed to the design of the study, interpretation of the results, and drafting of the manuscript. MR and AR conducted the data collection. NA did data analysis. All authors have read and approved the final version of the manuscript.
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This study was approved by the research and ethics committee of Birjand University of Medical Sciences (no. IR.BUMS.REC.1397.204).
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Rezaei, M., Rezaei, A., Esmaeili, A. et al. A case–control study on the relationship between urine trace element levels and autism spectrum disorder among Iranian children. Environ Sci Pollut Res 29, 57287–57295 (2022). https://doi.org/10.1007/s11356-022-19933-1
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DOI: https://doi.org/10.1007/s11356-022-19933-1