Abstract
Organohalogens are persistent organic pollutants that have a wide range of chemical application. There is growing evidence that several of these chemical compounds interfere with human development in various ways. The aim of this review is to provide an update on the relationship between various persistent organic pollutants and childhood neurodevelopmental outcome from studies from the past 10 years. This review focuses on exposure to polychlorinated biphenyls (PCBs), hydroxylated PCBs (OH-PCBs), polybrominated diphenyl ethers (PBDEs) and dichlorodiphenyldichloroethylene (DDE), and in addition on exposure to phthalates, bisphenol A, and perfluorinated compounds and their associations with neurodevelopmental outcome in childhood, up to 18 years of age. This review shows that exposure to environmental chemicals affects neurodevelopmental outcome in children. Regarding exposure to PCBs and OH-PCBs, most studies report no or inverse associations with neurodevelopmental outcomes. Regarding exposure to PBDEs, lower mental development, psychomotor development and IQ were found at preschool age, and poorer attention at school age. Regarding exposure to DDE, most studies reported inverse associations with outcome, while others found no associations. Significant relations were particularly found at early infancy on psychomotor development, on attention and ADHD, whereas at school age, no adverse relationships were described. Additionally, several studies report gender-related vulnerability. Future research should focus on the long-term effects of prenatal and childhood exposure to these environmental chemicals, on sex-specific and combined exposure effects of environmental chemicals, and on possible mechanisms by which these chemicals have their effects on neurodevelopmental and behavioral outcomes.
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Abbreviations
- ADHD:
-
Attention-deficit/hyperactivity disorder
- ASD:
-
Autism spectrum disorder
- AVLT:
-
Auditory Verbal Learning Test
- BASC:
-
Behavior Assessment System for Children
- BPA:
-
Bisphenol A
- BSID:
-
Bayley Scales of Infant Development
- CADS:
-
Conners’ ADHD/DSM-IV Scales
- CBCL:
-
Child Behavior Checklist
- CDI:
-
Communicative Development Indices
- CNS:
-
Central nervous system
- CPT:
-
Continuous Performance Test
- CRS-T:
-
Conners’ Rating Scale for Teachers
- DBD:
-
Disruptive Behavior Disorders Rating Scale
- DCD-Q:
-
Developmental Coordination Disorder Questionnaire
- DDE:
-
Dichlorodiphenyldichloroethylene
- DDT:
-
Dichlorodiphenyltrichloroethane
- IQ:
-
Intelligence quotient
- IQR:
-
Inter-quartile range
- ITSEA:
-
Infant–Toddler Social and Emotional Assessment
- MDI:
-
Mental Developmental Index
- NBAS:
-
Neonatal Behavioral Assessment Scale
- NEPSY:
-
Neuropsychological Assessment
- OH-PBC:
-
Hydroxylated polychlorinated biphenyl
- PBDE:
-
Polybrominated diphenyl ether
- PCB:
-
Polychlorinated biphenyl
- PDI:
-
Psychomotor Developmental Index
- PFC:
-
Perfluorinated compound
- PFOA:
-
Perfluorooctanoic acid
- PFOS:
-
Perfluorooctane sulfonate
- POP:
-
Persistent organic pollutant
- TEACh:
-
Test of Everyday Attention for Children
- TEQ:
-
Toxic Equivalency Quotient
- WISC:
-
Wechsler Intelligence Scale for Children
- WPPSI:
-
Wechsler Preschool and Primary Scale of Intelligence
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We acknowledge the Junior Scientific Master Class of the Research School for Behavioral and Cognitive Neurosciences, University of Groningen, The Netherlands, for their financial support.
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The authors declare that they have no conflict of interest.
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Berghuis, S.A., Bos, A.F., Sauer, P.J.J. et al. Developmental neurotoxicity of persistent organic pollutants: an update on childhood outcome. Arch Toxicol 89, 687–709 (2015). https://doi.org/10.1007/s00204-015-1463-3
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DOI: https://doi.org/10.1007/s00204-015-1463-3