Related Experiment Videos
Neurological condition in 18-month-old children perinatally exposed to polychlorinated biphenyls and dioxins
M Huisman1, C Koopman-Esseboom, C I Lanting
1Department of Obstetrics and Gynaecology, Nutrition and Development Unit, University of Groningen, The Netherlands.
Insights
Prenatal exposure to polychlorinated biphenyls (PCBs) negatively impacted infant neurological development. However, breast-feeding showed a beneficial effect on motor skills, with no detected harm from lactational PCB and dioxin exposure.
Area of Science:
- Environmental Health
- Neurodevelopmental Pediatrics
- Toxicology
Background:
- Prenatal and postnatal exposures to environmental contaminants like polychlorinated biphenyls (PCBs) and dioxins are potential risks to infant neurological development.
- Understanding the differential impact of exposure routes (transplacental vs. lactational) is crucial for public health guidance.
Purpose of the Study:
- To evaluate the association between prenatal and breast milk exposure to PCBs and dioxins and neurological optimality in 18-month-old Dutch children.
- To differentiate the effects of transplacental versus lactational exposure pathways.
Main Methods:
- Assessed neurological optimality in 418 Dutch infants at 18 months.
- Measured prenatal PCB exposure via cord and maternal plasma.
- Quantified postnatal PCB and dioxin exposure through analysis of human milk and formula.
Main Results:
- Transplacental PCB exposure was negatively correlated with neurological condition at 18 months.
- No adverse neurological effects were detected from lactational exposure to PCBs and dioxins.
- Breast-feeding demonstrated a positive association with improved fluency of movements.
Conclusions:
- Transplacental passage of PCBs exerts a minor negative influence on toddler neurological condition.
- Lactational exposure to PCBs and dioxins did not show detectable adverse effects in this cohort.
- Breast-feeding may offer benefits for motor skill development independent of contaminant exposure.
Abstract:
The neurological optimality of 418 Dutch children was evaluated at the age of 18 months, in order to determine whether prenatal and breast milk mediated exposure to polychlorinated biphenyls (PCBs) and dioxins affected neurological development. Half of the infants were breast-fed, the other half were formula-fed. PCB concentrations in cord and maternal plasma were used as a measure of prenatal exposure to PCBs. To measure postnatal exposure, PCB and dioxin congeners were determined in human milk and in formula milk. After adjusting for covariates, transplacental PCB exposure was negatively related to the neurological condition at 18 months. Although greater amounts of PCBs and dioxins are transferred via nursing than via placental passage, an effect of lactational exposure to PCBs and dioxins could not be detected. We even found a beneficial effect of breast-feeding on the fluency of movements. We conclude that transplacental PCB passage has a small negative effect on the neurological condition in 18-month-old toddlers.