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Determinants of plasma PCB, brominated flame retardants, and organochlorine pesticides in pregnant women and 3 year old children in The Norwegian Mother and Child Cohort Study.
Environ Res. 2016 Apr;146:136-44
Publication Type
Ida Henriette Caspersen
Helen Engelstad Kvalem
Margaretha Haugen
Anne Lise Brantsæter
Helle Margrete Meltzer
Jan Alexander
Cathrine Thomsen
May Frøshaug
Nanna Margrethe Bruun Bremnes
Sharon Lynn Broadwell
Berit Granum
Manolis Kogevinas
Helle Katrine Knutsen
Environ Res. 2016 Apr;146:136-44
Publication Type
Child, Preschool
Cohort Studies
Environmental Exposure
Environmental monitoring
Environmental pollutants - blood
Flame Retardants - metabolism
Hydrocarbons, Brominated - blood
Hydrocarbons, Chlorinated - blood
Life Style
Pesticides - blood
Polybrominated Biphenyls - blood
Polychlorinated biphenyls - blood
Exposure to persistent organic pollutants (POPs) during prenatal and postnatal life has been extensively studied in relation to adverse health effects in children.
The aim was to identify determinants of the concentrations of polychlorinated biphenyls (PCBs), brominated flame retardants (polybrominated diphenyl ethers, PBDEs; polybrominated biphenyl, PBB), and organochlorine pesticides (OCPs) in blood samples from pregnant women and children in The Norwegian Mother and Child Cohort Study (MoBa).
Blood samples were collected from two independent subsamples within MoBa; a group of women (n=96) enrolled in mid-pregnancy during the years 2002-2008 and a group of 3 year old children (n=99) participating during 2010-2011. PCB congeners (74, 99, 138, 153, 180, 170, 194, 209, 105, 114, 118, 156, 157, 167, and 189), brominated flame retardants (PBDE-28, 47, 99, 100, 153, 154, and PBB-153), as well as the OCPs hexachlorobenzene (HCB), oxychlordane, 4,4'dichlorodiphenyltrichloroethane (DDT), and 4,4'dichlorodiphenyldichloroethylene (DDE) were measured in both pregnant women and children.
Age, low parity, and low pre-pregnant BMI were the most important determinants of increased plasma concentrations of POPs in pregnant women. In 3 year old children, prolonged breastfeeding duration was a major determinant of increased POP concentrations. Estimated dietary exposure to PCBs during pregnancy was positively associated with plasma concentrations in 3 year old children, but not in pregnant women. Plasma concentrations were approximately 40% higher in children compared to pregnant women.
Several factors associated with exposure and toxicokinetics, i.e. accumulation, excretion and transfer via breastmilk of POPs were the main predictors of POP levels in pregnant women and children. Diet, which is the main exposure source for these compounds in the general population, was found to predict PCB levels only among children. For the PBDEs, for which non-dietary sources are more important, toxicokinetic factors appeared to have less predictive impact.
PubMed ID
26749444 View in PubMed
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