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National Institute of Environmental Health Sciences

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Your Environment. Your Health.

Publication Detail

Title: Fetal exposure to bisphenols and phthalates and childhood bone mass: a population-based prospective cohort study.

Authors: van Zwol-Janssens, Charissa; Trasande, Leonardo; Asimakopoulos, Alexandros G; Martinez-Moral, Maria-Pilar; Kannan, Kurunthachalam; Philips, Elise M; Rivadeneira, Fernando; Jaddoe, Vincent W V; Santos, Susana

Published In Environ Res, (2020 07)

Abstract: BACKGROUND: Exposure to bisphenols and phthalates might influence bone health. We hypothesized that exposure to bisphenols and phthalates during fetal life has persistent effects on bone development. OBJECTIVES: To analyze the associations of fetal exposure to bisphenols and phthalates with bone health in school-aged children. METHODS: Among 1,362 mother-child pairs participating in a population-based cohort study, we measured maternal urinary concentrations of bisphenols and phthalates at first, second and third trimester with high performance liquid chromatography electrospray ionization-tandem mass spectrometry. Total body bone mineral density (BMD) and bone area (BA) were measured using dual-energy X-ray absorptiometry (DXA) at 6 and 10 years, and were both used to calculate bone mineral content (BMC) and area-adjusted BMC (aBMC, a measure of volumetric BMD). RESULTS: Maternal bisphenol concentrations were not associated with childhood bone measures at 6 years. After adjustment for covariates and multiple testing correction, an interquartile range increase in maternal first trimester bisphenol S (BPS) concentrations was associated with lower BMD and aBMC at 10 years (-6.08 (95% confidence interval (CI), -9.97 to -2.19) mg/cm2 and -0.12 (95% CI, -0.20 to -0.04) g). Maternal third trimester low molecular weight (LMW) phthalate concentrations were associated with higher aBMC at 6 years whereas, maternal third trimester di-n-octylphthalate (DNOP) concentrations were associated with lower aBMC at 10 years. However, these associations did not remain statistically significant after multiple testing correction. DISCUSSION: Maternal first trimester BPS concentrations are associated with lower BMD and aBMC in school-aged children. These findings should be considered as hypothesis generating and need further replication and exploration of potential underlying mechanisms.

PubMed ID: 32668547 Exiting the NIEHS site

MeSH Terms: Bone Density*; Child; Cohort Studies; Female; Humans; Phthalic Acids*/toxicity; Pregnancy; Prospective Studies

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