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- W3193391959 abstract "BACKGROUND AND AIM: Optimizing bone mineral density (BMD) in adolescence is critical for life-long bone health. Organophosphate esters (OPEs) are synthetic flame retardants and plasticizers that may have osteotoxic effects via endocrine disruption or nuclear receptor agonism. Animal studies suggest that gestation may be a critical period of susceptibility for the impact of OPEs on bone health, but human studies are lacking. We assessed the relation of maternal urinary OPE metabolite concentrations during pregnancy with early adolescent BMD in a prospective birth cohort study. METHODS: We used data from 223 mother-child dyads enrolled in the HOME Study from Cincinnati, OH area, 2003-2006. We measured bis-2-chloroethyl phosphate (BCEP), bis-(1,3-dichloro-2-propyl) phosphate (BDCIPP), di-n-butyl phosphate (DnBP), and diphenyl phosphate (DPHP) in maternal urine collected at 16- and 26-weeks gestation, and calculated the average of creatinine-adjusted concentrations. We performed dual x-ray absorptiometry in children at age 12 years and calculated height-, age-, sex-, and population ancestry-specific Z-scores for whole body (excluding head), total hip, femoral neck, distal radius, and ultradistal radius areal BMD (aBMD) and spine bone mineral apparent density (BMAD). We estimated covariate-adjusted associations per 2-fold increase in maternal urinary OPE concentrations and assessed effect measure modification by child sex. RESULTS:In adjusted analyses, BDCIPP concentrations were positively associated with aBMD and BMAD Z-scores at most skeletal sites. Z-score differences were between 0.11 and 0.15 and greatest for total hip (β = 0.15, 95% CI: 0.02, 0.29). Associations of DPHP with femoral neck and total hip aBMD differed by child sex. Associations among males were null while DPHP concentrations were inversely associated with femoral neck (β = -0.15, 95% CI: -0.29, -0.02) and total hip (β = -0.15, 95% CI: -0.29, 0.00) aBMD Z-scores among females. CONCLUSIONS:Maternal OPE exposures during gestation may affect early adolescent BMD in a metabolite-, sex-, and bone site-specific manner. KEYWORDS: Chemical exposures, Children's environmental health, Endocrine disrupting chemicals" @default.
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- W3193391959 date "2021-08-23" @default.
- W3193391959 modified "2023-09-22" @default.
- W3193391959 title "Gestational organophosphate ester exposures and bone mineral density in early adolescence: The HOME Study" @default.
- W3193391959 doi "https://doi.org/10.1289/isee.2021.p-207" @default.
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