Prenatal exposure to polybrominated diphenyl ethers and polyfluoroalkyl chemicals and infant neurobehavior

Area of Science:

• Environmental Health
• Neuroscience
• Pediatrics

Background:

• Prenatal exposure to environmental chemicals like polybrominated diphenyl ethers (PBDEs) and polyfluoroalkyl chemicals (PFCs) may impact infant neurodevelopment.
• Understanding these associations is crucial for public health and early intervention strategies.

Purpose of the Study:

• To investigate the relationship between prenatal exposure to PBDEs and PFCs and early infant neurobehavioral outcomes.
• To assess the impact of specific chemicals, including BDE-47, perfluorooctanoic acid (PFOA), and perfluorooctane sulfonic acid (PFOS), on infant neurobehavior.

Main Methods:

• A cohort study of 349 mother/infant pairs was conducted.
• Maternal serum concentrations of PBDEs and PFCs were measured during pregnancy.
• Infant neurobehavior was assessed at 5 weeks using the Neonatal Intensive Care Unit Network Neurobehavioral Scale (NNNS).

Main Results:

• No significant associations were found between overall PBDE or PFC exposure and individual NNNS outcomes.
• Latent profile analysis identified neurobehavioral profiles: social/easygoing, high arousal/difficult, and hypotonic.
• A 10-fold increase in prenatal PFOA was associated with a significantly higher likelihood of being categorized as hypotonic (aOR 3.79).

Conclusions:

• Higher prenatal perfluorooctanoic acid (PFOA) concentrations are associated with an increased risk of infant hypotonia.
• No association was found between prenatal polybrominated diphenyl ether (PBDE) exposure and hypotonia.
• Further research is recommended to explore the link between prenatal PFC exposure and infant muscle tone.