Increased micronuclei and bulky DNA adducts in cord blood after maternal exposures to traffic-related air pollution
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Increased micronuclei and bulky DNA adducts in cord blood after maternal exposures to traffic-related air pollution. / Pedersen, Marie; Wichmann, J; Autrup, H; Dang, D A; Decordier, I; Hvidberg, M; Bossi, R; Jakobsen, Jette; Loft, S; Knudsen, Lisbeth E.
In: Environmental Research, Vol. 109, No. 8, 2009, p. 1012-20.Research output: Contribution to journal › Journal article › peer-review
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TY - JOUR
T1 - Increased micronuclei and bulky DNA adducts in cord blood after maternal exposures to traffic-related air pollution
AU - Pedersen, Marie
AU - Wichmann, J
AU - Autrup, H
AU - Dang, D A
AU - Decordier, I
AU - Hvidberg, M
AU - Bossi, R
AU - Jakobsen, Jette
AU - Loft, S
AU - Knudsen, Lisbeth E.
N1 - Keywords: Air Pollutants; Biological Markers; Confounding Factors (Epidemiology); DNA Adducts; Environmental Exposure; Environmental Monitoring; Female; Fetal Blood; Humans; Maternal Exposure; Micronucleus Tests; Pregnancy; Questionnaires
PY - 2009
Y1 - 2009
N2 - Exposure to traffic-related air pollution in urban environment is common and has been associated with adverse human health effects. In utero exposures that result in DNA damage may affect health later in life. Early effects of maternal and in utero exposures to traffic-related air pollution were assessed through the use of validated biomarkers in blood cells from mother-newborn pairs. A cross-sectional biomonitoring study with healthy pregnant women living in the Greater Copenhagen area, Denmark, was conducted. Bulky DNA adducts and micronuclei (MN) were measured in blood from 75 women and 69 umbilical cords, concurrently collected at the time of planned Caesarean section. Modeled residential traffic density, a proxy measure of traffic-related air pollution exposures, was validated by indoor levels of nitrogen dioxide and polycyclic aromatic hydrocarbons in 42 non-smoking homes. DNA adduct levels were similar and positively correlated in maternal and cord blood (1.40 vs. 1.37 n/10(8) nucleotides; r=0.99; p<0.01). Maternal MN frequencies were significantly associated with age (p<0.01), and higher than those of the newborns (7.0 vs. 3.2 MN per 1000 binucleated cells). Adduct levels were highest among mother-newborn pairs who lived near medium-traffic-density (>400-2500 vehicle km/24h; p<0.01) places. MN frequencies among newborns from women who lived at high-traffic-density homes (>2500 vehicle km/24h) were significantly increased (p=0.02). This trend remained after adjusting for potential confounders and effect modifiers. For the first time increased bulky DNA adducts and MN in cord blood after maternal exposures to traffic-related air pollution are found, demonstrating that these transplacental environmental exposures induce DNA damage in newborns. Given that increased DNA damage early in life indicate an increased risk for adverse health effects later in life, these findings justify intervention of pregnant women.
AB - Exposure to traffic-related air pollution in urban environment is common and has been associated with adverse human health effects. In utero exposures that result in DNA damage may affect health later in life. Early effects of maternal and in utero exposures to traffic-related air pollution were assessed through the use of validated biomarkers in blood cells from mother-newborn pairs. A cross-sectional biomonitoring study with healthy pregnant women living in the Greater Copenhagen area, Denmark, was conducted. Bulky DNA adducts and micronuclei (MN) were measured in blood from 75 women and 69 umbilical cords, concurrently collected at the time of planned Caesarean section. Modeled residential traffic density, a proxy measure of traffic-related air pollution exposures, was validated by indoor levels of nitrogen dioxide and polycyclic aromatic hydrocarbons in 42 non-smoking homes. DNA adduct levels were similar and positively correlated in maternal and cord blood (1.40 vs. 1.37 n/10(8) nucleotides; r=0.99; p<0.01). Maternal MN frequencies were significantly associated with age (p<0.01), and higher than those of the newborns (7.0 vs. 3.2 MN per 1000 binucleated cells). Adduct levels were highest among mother-newborn pairs who lived near medium-traffic-density (>400-2500 vehicle km/24h; p<0.01) places. MN frequencies among newborns from women who lived at high-traffic-density homes (>2500 vehicle km/24h) were significantly increased (p=0.02). This trend remained after adjusting for potential confounders and effect modifiers. For the first time increased bulky DNA adducts and MN in cord blood after maternal exposures to traffic-related air pollution are found, demonstrating that these transplacental environmental exposures induce DNA damage in newborns. Given that increased DNA damage early in life indicate an increased risk for adverse health effects later in life, these findings justify intervention of pregnant women.
U2 - 10.1016/j.envres.2009.08.011
DO - 10.1016/j.envres.2009.08.011
M3 - Journal article
C2 - 19783246
VL - 109
SP - 1012
EP - 1020
JO - Environmental Research
JF - Environmental Research
SN - 0013-9351
IS - 8
ER -
ID: 16941485