Prenatal Pesticide Exposure Linked to Neurodevelopment Issues in Children

Strategic Insights -

Research published in the International Journal of Hygiene and Environmental Health has shed light on the potential impact of prenatal pesticide exposure on child neurodevelopment. The study, conducted on a cohort of pregnant farmworkers from Thailand, aimed to investigate the relationship between urinary metabolites of pyrethroid pesticides, placental gene expression networks, and newborn neurobehavior. The findings suggest that prenatal exposure to pyrethroids may impair placental function, leading to neurodevelopmental issues in children.

Key Takeaways:

  • The study examined a cohort of 248 pregnant farmworkers from Thailand and found significant associations between prenatal pyrethroid exposure and placental gene expression networks.
  • The research identified 21 gene network modules in the placenta that were significantly associated with metabolites of pyrethroid pesticides.
  • Nine distinct modules were found to be associated with newborn neurobehavior, with eight modules showing overlap with stress-related pathways.
  • The study highlighted the early and late trimesters as critical periods for the exposures' influence on placental function.
  • Prenatal exposure to pyrethroids was found to negatively affect protein secretion and oxidative phosphorylation modules in the placenta.
  • The cumulative sum of 3-phenoxybenzoic acid across pregnancy was significantly negatively associated with the oxidative phosphorylation module.

Statistics:

  • 248 pregnant farmworkers from Thailand were part of the study cohort.
  • Nine distinct modules in the placenta were found to be associated with newborn neurobehavior.
  • Eight modules showed overlap with stress-related pathways.
  • 21 gene network modules in the placenta were significantly associated with metabolites of pyrethroid pesticides.
  • The study found that prenatal exposure to pyrethroids was negatively associated with protein secretion and oxidative phosphorylation modules in the placenta.
  • The cumulative sum of 3-phenoxybenzoic acid across pregnancy was significantly negatively associated with the oxidative phosphorylation module.

Sources:

  • Prenatal pyrethroid exposure, placental gene network modules, and neonatal neurobehavior. International Journal of Hygiene and Environmental Health, 2025;269:114646.
  • International Journal of Hygiene and Environmental Health. Elsevier Gmbh, Hackerbrucke 6, 80335 Munich, Germany. (www.elsevier.com; www.journals.elsevier.com/international-journal-of-hygiene-and-environmental-health/)
  • Emory University. Gangarosa Dept. of Environmental Health, Rollins School of Public Health, Atlanta, GA, United States.