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Open AccessJournal ArticleDOI

Exposure to Drinking Water Trihalomethanes and Their Association with Low Birth Weight and Small for Gestational Age in Genetically Susceptible Women

TLDR
It is suggested that THM internal dose may affect foetal growth and that maternal GSTM1 genotype modifies the THM exposure effects on LBW.
Abstract
Little is known about genetic susceptibility to individual trihalomethanes (THM) in relation to adverse pregnancy outcomes. We conducted a nested case-control study of 682 pregnant women in Kaunas (Lithuania) and, using individual information on drinking water, ingestion, showering and bathing, and uptake factors of THMs in blood, estimated an internal THM dose. We used logistic regression to evaluate the relationship between internal THM dose, birth outcomes and individual and joint (modifying) effects of metabolic gene polymorphisms. THM exposure during entire pregnancy and specific trimesters slightly increased low birth weight (LBW) risk. When considering both THM exposure and maternal genotypes, the largest associations were found for third trimester among total THM (TTHM) and chloroform-exposed women with the GSTM1–0 genotype (OR: 4.37; 95% CI: 1.36–14.08 and OR: 5.06; 95% CI: 1.50–17.05, respectively). A test of interaction between internal THM dose and GSTM1–0 genotype suggested a modifying effect of exposure to chloroform and bromodichloromethane on LBW risk. However, the effect on small for gestational age (SGA) was not statistically significant. These data suggest that THM internal dose may affect foetal growth and that maternal GSTM1 genotype modifies the THM exposure effects on LBW.

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Journal ArticleDOI

Maternal cigarette smoking, metabolic gene polymorphism, and infant birth weight

TL;DR: Maternal genotypes for enzymes participating in metabolism of polycyclic aromatic hydrocarbons alter the association between cigarette smoking and birth weight, and this finding raises the question of whether metabolic genes interact with smoking.
Journal ArticleDOI

Birth Weight, Ethnicity, and Exposure to Trihalomethanes and Haloacetic Acids in Drinking Water during Pregnancy in the Born in Bradford Cohort.

TL;DR: The findings demonstrate associations between THM, but not HAA, exposure during pregnancy and reduced birth weight, but suggest this differs by ethnicity, and suggest that THMs are not acting as a proxy for HAAs, or vice-versa.
Journal ArticleDOI

Total organic halogen (TOX) in human urine: A halogen-specific method for human exposure studies

TL;DR: A new comprehensive bioanalytical method has been developed that can quantify mixtures of organic halogenated compounds, including DBPs, in human urine as total organic chlorine (TOCl), total organic bromine (TOBr), and total organic iodine (TOI).
Journal ArticleDOI

Association Between Trihalomethane Concentrations in Drinking Water and Adverse Pregnancy Outcome in Taiwan

Chun-Yuh Yang, +1 more
- 01 Nov 2009 - 
TL;DR: The study results provide no evidence of an increased risk of TLBW, SGA, and preterm delivery at the relatively low concentrations of TTHMs in Taiwan's drinking water.
References
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Journal ArticleDOI

Maternal smoking, GSTM1 and GSTT1 polymorphism and susceptibility to adverse pregnancy outcomes.

TL;DR: The results of this study suggested that smoking, even at a low-level, ought to be considered a potential risk factor for adverse birth outcomes and that genetic polymorphism may contribute to individual variation in tobacco smoke response.
Journal ArticleDOI

Maternal/newborn GSTT1 null genotype contributes to risk of preterm, low birthweight infants.

TL;DR: It is suggested that women and/or newborns with the GSTT1 null genotype who are exposed to cigarette smoke during pregnancy are at elevated risk for premature delivery.
Journal ArticleDOI

Estimated Effects of Disinfection By-products on Birth Weight in a Population Served by a Single Water Utility

TL;DR: In this article, the authors examined the effects of trimester-specific and pregnancy average exposures to total trihalomethane in drinking water on term low birth weight in all singleton births.
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