ArticleEnvironmental research2026
Prenatal exposure to phthalates, maternal oxidative stress, and early childhood neurobehavior: a pathway modeling approach.
Article in Environmental research, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
objectivePhthalates are recognized endocrine disruptors and emerging neurotoxicants. Prenatal exposure to di-2-ethylhexyl phthalate (DEHP) has been linked to adverse neurodevelopmental and neuropsychiatric outcomes, and maternal oxidative stress may play a mechanistic role in prenatal DEHP's neurotoxicity. MATERIALS AND
methodsParticipants were drawn from the New York University Children's Health and Environment Study. Prenatal DEHP exposure and maternal lipid peroxidation were assessed using repeated creatinine-adjusted maternal urinary measurements across pregnancy, collected from January 2016-April 2020. Neonatal brain-derived neurotrophic factor (BDNF) was measured in cord serum (N = 337), and internalizing and externalizing problems were assessed at an average age of 2 years using the Child Behavior Checklist for Ages 1.5-5 (CBCL 1½-5) (N = 824). DEHP metabolites (mEHHP; mEOHP; mECPP) were averaged across pregnancy, and cumulative lipid peroxidation biomarkers (8-iso-PGF2α; 15-PGF2α; 8,15-PGF2α; MDA) were estimated using area-under-the-curve values from linear mixed-effects spline models. Partial least squares path modeling evaluated direct and indirect associations using latent constructs for DEHP exposure, lipid peroxidation, CBCL 1½-5, and socioeconomic status; other covariates were modeled as single variables. Sex differences were assessed using bootstrapping and sex-stratified models, adjusting for maternal and child age, parity, pre-pregnancy body mass index, cotinine exposure, and socioeconomic status.
resultsPrenatal DEHP exposure was positively associated with maternal lipid peroxidation in all models (β's = 0.11-0.27). Sex-stratified analyses showed that prenatal DEHP exposure was positively associated with CBCL 1½-5 in male children only (β = 0.11), but not with BDNF in either sex. Maternal lipid peroxidation was not associated with BDNF or CBCL 1½-5 in either sex.
conclusionPrenatal DEHP exposure is associated with maternal oxidative stress and total behavioral problems in male children only, but maternal oxidative stress does not mediate these relationships. Alternative upstream mechanisms may underlie both maternal oxidative stress and neurobehavioral outcomes. Future studies should investigate endocrine, metabolic, and epigenetic pathways to clarify DEHP neurotoxicity.
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