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Identifying Vulnerable Periods of Neurotoxicity to Triclosan Exposure in Children
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Details:
  • Personal Authors:
  • Keywords:
  • Pubmed ID:
    29727133
  • Pubmed Central ID:
    PMC6072011
  • Description:
    Background:

    Exposure to triclosan, an endocrine disrupting chemical, may affect thyroid hormone homeostasis and adversely affect neurodevelopment.

    Objective:

    Using a longitudinal pregnancy and birth cohort, we investigated associations between triclosan exposures during different time windows, and cognitive test scores at 8 y of age in 198 children from the HOME Study.

    Methods:

    We quantified triclosan in urine samples from mother–child pairs up to nine times between the second trimester of gestation and 8 y of age. The Wechsler Intelligence Scale for Children-IV [i.e., Full-Scale Intelligence Quotient (IQ)] assessment was administered to HOME Study children at 8 y of age. We estimated covariate-adjusted triclosan–IQ associations at each visit. We also tested whether associations between triclosan concentrations and cognitive test scores varied among exposure at different time periods.

    Results:

    Full-Scale IQ was not significantly associated with urinary triclosan concentrations during gestation or childhood but was significantly associated with a 10-fold increase in maternal urinary triclosan concentration at delivery [−4.5 points (95% CI: −7.0, −2.0)]. Perceptual Reasoning Index (PRI) scores were significantly decreased in association with urinary triclosan concentrations at delivery and at 2 y of age. Associations between repeated triclosan concentrations and cognitive test scores significantly varied among exposure at different time periods for Full-Scale IQ, PRI, Verbal Comprehension Index, and Working Memory (triclosan–visit interaction p≤0.04).

    Conclusion:

    Urinary triclosan concentrations at delivery, but not during mid to late pregnancy and childhood, were associated with significantly lower children’s cognitive test scores at 8 y of age in this cohort of U.S. children. https://doi.org/10.1289/EHP2777

  • Document Type:
    Journal Article
  • Collection(s):
    CDC Public Access
  • Funding:
    P01 ES011261/ES/NIEHS NIH HHS/United States
    R01 ES014575/ES/NIEHS NIH HHS/United States
    R01 ES020349/ES/NIEHS NIH HHS/United States
    R01 ES024381/ES/NIEHS NIH HHS/United States
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