Global metabolomic alterations associated with endocrine-disrupting chemicals among pregnant individuals and newborns

Metabolomics. 2025 Jan 25;21(1):20. doi: 10.1007/s11306-024-02219-7.

Abstract

Background: Gestational exposure to non-persistent endocrine-disrupting chemicals (EDCs) may be associated with adverse pregnancy outcomes. While many EDCs affect the endocrine system, their effects on endocrine-related metabolic pathways remain unclear. This study aims to explore the global metabolome changes associated with EDC biomarkers at delivery.

Methods: This study included 75 pregnant individuals who delivered at the University of Cincinnati Hospital from 2014 to 2017. We measured maternal urinary biomarkers of paraben/phenol (12), phthalate (13), and phthalate replacements (4) from the samples collected during the delivery visit. Global serum metabolome profiles were analyzed from maternal blood (n = 72) and newborn (n = 63) cord blood samples collected at delivery. Fifteen of the 29 urinary biomarkers were excluded due to low detection frequency or potential exposures during hospital stay. We assessed metabolome-wide associations between 14 maternal urinary biomarkers and maternal/newborn metabolome profiles. Additionally, performed enrichment analysis to identify potential alterations in metabolic pathways.

Results: We observed metabolome-wide associations between maternal urinary concentrations of phthalate metabolites (mono-isobutyl phthalate), phthalate replacements (mono-2-ethyl-5-carboxypentyl terephthalate, mono-2-ethyl-5-hydroxyhexyl terephthalate) and phenols (bisphenol-A, bisphenol-S) and maternal serum metabolome, using q-value < 0.2 as a threshold. Additionally, associations of phthalate metabolites (mono-n-butyl phthalate, monobenzyl phthalate) and phenols (2,5-dichlorophenol, BPA) with the newborn metabolome were noted. Enrichment analyses revealed associations (p-gamma < 0.05) with amino acid, carbohydrate, lipid, glycan, vitamin, and other cofactor metabolism pathways.

Conclusion: Maternal paraben, phenol, phthalate, and phthalate replacement biomarker concentrations at delivery were associated with maternal and newborn serum global metabolome.

Keywords: Fetus; Metabolome; Phenol; Phthalate; Pregnancy; Untargeted metabolomics.

MeSH terms

  • Adult
  • Biomarkers* / blood
  • Biomarkers* / urine
  • Endocrine Disruptors* / blood
  • Endocrine Disruptors* / urine
  • Female
  • Fetal Blood / chemistry
  • Fetal Blood / metabolism
  • Humans
  • Infant, Newborn
  • Maternal Exposure / adverse effects
  • Metabolome*
  • Metabolomics* / methods
  • Phthalic Acids* / metabolism
  • Phthalic Acids* / urine
  • Pregnancy
  • Young Adult

Substances

  • Endocrine Disruptors
  • Phthalic Acids
  • Biomarkers