TPS 743: Health effects in pregnancy, Exhibition Hall, Ground floor, August 26, 2019, 3:00 PM - 4:30 PM Background/Aim: Human exposure to parabens is very common in daily life by using personal care products. These chemicals are associated with poor birth outcomes. However, modifying effects of polymorphism in glutathione S-transferases (GST) gene remain unexplored. Therefore, the aim of this study was to investigate the effect of genetic polymorphisms on the association of prenatal exposure to parabens with birth outcomes. Methods: We plan to recruit more than 300 women during 3rd stage pregnancy between 2017 and 2019 in Korean pregnant women, called The Mother And Kids Environmental health (MAKE) Study. We measured parabens (Methyl-paraben (MeP), Ethyl-paraben (EtP), Propyl-paraben (PrP)) concentrations in maternal urine samples, also collected information on birth outcome, socio-economic status, and consumption habits of consumer products. Multivariate linear regression was used to examine whether the association between prenatal exposure to parabens and birth outcomes (gestational age, birth weight, body length, head circumference and abdominal circumference) varied by maternal GST genes. Results: The adjusted geometric means for urinary concentrations of MeP, EtP, and PrP were 13.96, 9.45, and 1.70 ng/mL, respectively. Parabens were positively associated with weight and abdominal circumference at birth. In particular, MeP and PrP showed significant association with an increase in abdominal circumference (MeP, ß=0.355, p=0.02; PrP, ß=0.376, p=0.02) adjusting for potential confounders. Prenatal exposure to parabens showed significantly positive association with abdominal circumference in mother of GST null genotype (MeP, ß=0.634, p=0.02; EtP, ß=0.546, p=0.05; PrP, ß=0.618, p=0.04). Conclusions: This study reported the association between prenatal parabens exposure and birth outcomes. We also found that GST polymorphism might affect the association between prenatal parabens exposure and abdominal circumference, suggesting the effect of genetic susceptibility on the relation between prenatal parabens exposure and abdominal circumference.
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