Related Experiment Video
Updated: May 12, 2026
Long-term Behavioral and Reproductive Consequences of Embryonic Exposure to Low-dose Toxicants
Published on: March 6, 2018
Prenatal exposure to a polychlorinated biphenyl (PCB) congener influences fixation duration on biological motion at
Hirokazu Doi1, Shota Nishitani, Takashi X Fujisawa
1Department of Neurobiology and Behavior, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan.
Insights
Prenatal exposure to polychlorinated biphenyls (PCBs) may impact infant social development. Low-level exposure to PCB #118 in newborns showed a preference for biological motion, unlike higher exposures.
Area of Science:
- Neuroscience
- Developmental Psychology
- Environmental Health
Background:
- Previous studies link prenatal polychlorinated biphenyl (PCB) exposure to adverse brain development.
- Limited research exists on the impact of prenatal PCB exposure on early social development.
Purpose of the Study:
- To investigate the relationship between PCB congener levels in umbilical cord blood and infant visual attention to biological motion (BM).
- To understand the neurotoxicity of PCBs concerning socio-cognitive development.
Main Methods:
- Measured PCB congener concentrations in umbilical cord blood.
- Analyzed infant fixation patterns on upright and inverted BM stimuli at four months postpartum.
- Focused on dioxin-like PCB #118 and its association with BM recognition.
Main Results:
- A significant link was found between dioxin-like PCB #118 concentration and fixation patterns.
- Infants with low prenatal PCB #118 exposure preferred upright BM over inverted BM.
- Infants with high prenatal PCB #118 exposure did not show this preference.
Conclusions:
- Prenatal PCB exposure may impair the development of social functioning.
- Congener-specific analysis is crucial for assessing the risks of PCB exposure on brain development.
Abstract:
Adverse effects of prenatal exposure to polychlorinated biphenyl (PCB) congeners on postnatal brain development have been reported in a number of previous studies. However, few studies have examined the effects of prenatal PCB exposure on early social development. The present study sought to increase understanding of the neurotoxicity of PCBs by examining the relationship between PCB congener concentrations in umbilical cord blood and fixation patterns when observing upright and inverted biological motion (BM) at four-months after birth. The development of the ability to recognize BM stimuli is considered a hallmark of socio-cognitive development. The results revealed a link between dioxin-like PCB #118 concentration and fixation pattern. Specifically, four-month-olds with a low-level of prenatal exposure to PCB #118 exhibited a preference for the upright BM over inverted BM, whereas those with a relatively high-level of exposure did not. This finding supports the proposal that prenatal PCB exposure impairs the development of social functioning, and indicates the importance of congener-specific analysis in the risk analysis of the adverse effects of PCB exposure on the brain development.
