Early life Triclosan exposure and child adiposity at 8 Years of age: a prospective cohort study

Geetika Kalloo, Antonia M Calafat, Aimin Chen, Kimberly Yolton, Bruce P Lanphear, Joseph M Braun, Geetika Kalloo, Antonia M Calafat, Aimin Chen, Kimberly Yolton, Bruce P Lanphear, Joseph M Braun

Abstract

Background: Triclosan is an antimicrobial agent that may affect the gut microbiome and endocrine system to influence adiposity. However, little data from prospective studies examining prenatal and childhood exposures exist. We investigated the relationship between multiple, prospective early life measure of triclosan exposure and child adiposity. METHODS: In a prospective cohort of 220 mother-child pairs from Cincinnati, OH (enrolled 2003-2006), we quantified triclosan in urine samples collected twice during pregnancy, annually from 1 to 5 years of age, and once at 8 years. We assessed child adiposity at age 8 years using body mass index (BMI), waist circumference, and bioelectric impedance. We estimated covariate-adjusted associations of child adiposity with a 10-fold increase in average prenatal, average early childhood (average of 1-5 years), and 8-year triclosan concentrations.

Results: Among all children, there was no association between triclosan and child adiposity. While urinary triclosan concentrations at all three time periods were weakly, imprecisely, and inversely associated with all three measures of adiposity among girls, these associations did not differ significantly from those in boys (sex x triclosan p-values> 0.35). Among girls, the strongest associations were generally observed for prenatal triclosan when we adjusted for all three triclosan concentrations and covariates in the same model; BMI z-score (β: -0.13; 95% CI: -0.42, 0.15), waist circumference (β: - 1.7 cm; 95% CI: -4.2, 0.7), and percent body fat (β :-0.6; 95% CI: -2.7, 1.3). In contrast, the associations between triclosan concentrations and adiposity measures were inconsistent among boys.

Conclusion: We did not observe evidence of an association of repeated urinary triclosan concentrations during pregnancy and childhood with measures of child adiposity at age 8 years in this cohort.

Keywords: Adiposity; Endocrine disruptors; Environmental exposures; Prenatal exposure; Triclosan.

Conflict of interest statement

Ethics approval and consent to participate

Written informed consent was provided by all women for themselves and their children. The institutional review boards (IRB) of Cincinnati Children’s Hospital Medical Center (CCHMC), the hospitals at which the children were delivered, and the Centers for Disease Control and Prevention (CDC) approved this study protocol. The IRB at Brown University relinquished authority to the CCHMC IRB through an Interagency Agreement.

Consent for publication

Not Applicable.

Competing interests

The authors declare that they have no competing interests.

Publisher’s Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Figures

Fig. 1
Fig. 1
Urinary triclosan concentrations during three developmental periods among women and children from the HOME Studya,b. Whiskers represent the minimum and maximum, and the box edges represent the 25th and 75th percentiles, the line in the box is the median and the diamond is the arithmetic mean. The median prenatal triclosan concentrations are higher than triclosan concentrations during either early childhood or 8 years of age. aPrenatal triclosan concentrations derived from the mean of the 16-week and 26-week urinary triclosan concentrations. Early childhood triclosan concentrations derived from the mean of urinary triclosan concentrations taken annually from 1 to 5 years of age and eight year triclosan concentrations were taken concurrently at the time of adiposity measurement. All urinary triclosan concentrations are creatinine standardized. bThe minimum for all urinary triclosan concentrations was set to LOD/sqrt(2)

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