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Exposure to Brominated Trihalomethanes in Water During Pregnancy and Micronuclei Frequency in Maternal and Cord Blood Lymphocytes

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posted on 11.04.2016, 00:00 by Leslie T Stayner, Marie Pedersen, Evridiki Patelarou, Ilse Decordier, Kim Vande Loock, Leda Chatzi, Ana Espinosa, Eleni Fthenou, Mark J Nieuwenhuijsen, Esther Gracia-Lavedan, Euripides G Stephanou, Micheline Kirsch-Volders, Manolis Kogevinas
Background: Water disinfection by-products have been associated with an increased cancer risk. Micronuclei (MN) frequency in lymphocytes is a marker of genomic damage and can predict adult cancer risk. Objective: We evaluated maternal exposure to drinking water brominated trihalomethanes (BTHM) in relation to MN frequency in maternal and cord blood lymphocytes. Methods: MN frequency was examined in 214 mothers and 223 newborns from the Rhea mother–child cohort in Crete, Greece, in 2007–2008. Residential BTHM water concentrations were estimated during pregnancy using tap water analyses and modeling. Questionnaires on water related habits were used to estimate BTHM exposure from all routes. Associations between BTHM and MN frequency were estimated using negative binomial regression. Results: BTHM concentrations in residential tap water during pregnancy ranged from 0.06 to 7.1 μg/L. MN frequency in maternal binucleated lymphocytes was found to increase with BTHM concentrations in residential water for exposure during the first [rate ratio (RR) for 1 μg/L = 1.05; 95% CI: 1.00, 1.11] and second trimesters (RR for 1 μg/L = 1.03; 95% CI: 1.00, 1.06), and through all routes of BTHM exposure during the first trimester (RR for 1 μg/week = 3.14; 95% CI: 1.16, 8.50). Conclusions: These findings suggest that exposure to BTHM may increase the frequency of MN in maternal binucleated lymphocytes.

Funding

This study was supported by the European Union–funded projects NewGeneris (contract no. FOOD-CT-2005-016320) and HiWATE (contract no FOOD-CT-2006-036224). L.T.S. received support for this work from an Agaur Fellowship grant from the Catalunya Ministry of Education. M.P. holds a Juan de la Cierva postdoctoral fellowship awarded from the Spanish Ministry of Science and Innovation (JCI-2011-09479).

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Publisher Statement

Reproduced with permission from Environmental Health Perspectives

Publisher

National Institute of Environmental Health Sciences

Language

en_US

issn

1552-9924

Issue date

01/11/2013

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