In Utero DNA Damage from Environmental Pollution Is Associated with Somatic Gene Mutation in Newborns
Transplacental exposure to carcinogenic air pollutants from the combustion of fossil fuels is a growing health concern, given evidence of the heightened susceptibility of the fetus. These mutagenic/carcinogenic pollutants include aromatic compounds such as polycyclic aromatic hydrocarbons that bind...
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Published in | Cancer epidemiology, biomarkers & prevention Vol. 11; no. 10; pp. 1134 - 1137 |
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Main Authors | , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Philadelphia, PA
American Association for Cancer Research
01.10.2002
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Abstract | Transplacental exposure to carcinogenic air pollutants from the combustion of fossil fuels is a growing health concern, given
evidence of the heightened susceptibility of the fetus. These mutagenic/carcinogenic pollutants include aromatic compounds
such as polycyclic aromatic hydrocarbons that bind to DNA, forming chemical-DNA adducts. We have investigated the genotoxic
effects of transplacental exposure in humans by analyzing aromatic-DNA adducts and the frequency of gene mutations at the
hypoxanthine-guanine phosphoribosyltransferase ( HPRT ) locus in umbilical cord and maternal blood samples. Here we show, in a cross-sectional study of 67 mothers and 64 newborns
from the Krakow Region of Poland, that aromatic-DNA adducts measured by 32 P-postlabeling are positively associated with HPRT mutant frequency in the newborns (β = 0.56, P = 0.03) after controlling for exposure to tobacco smoke, diet, and socioeconomic status. In contrast to the fetus, HPRT mutations and DNA adducts do not reflect similar exposure periods in the mother, and the maternal biomarkers were not correlated.
Adducts were higher in the newborn than the mother, indicating differential susceptibility of the fetus to DNA damage; but
HPRT mutation frequency was 4-fold lower, consistent with the long lifetime of the biomarker. These results provide the first
demonstration of a molecular link between somatic mutation in the newborn and transplacental exposure to common air pollutants,
a finding that is relevant to cancer risk assessment. |
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AbstractList | Transplacental exposure to carcinogenic air pollutants from the combustion of fossil fuels is a growing health concern, given
evidence of the heightened susceptibility of the fetus. These mutagenic/carcinogenic pollutants include aromatic compounds
such as polycyclic aromatic hydrocarbons that bind to DNA, forming chemical-DNA adducts. We have investigated the genotoxic
effects of transplacental exposure in humans by analyzing aromatic-DNA adducts and the frequency of gene mutations at the
hypoxanthine-guanine phosphoribosyltransferase ( HPRT ) locus in umbilical cord and maternal blood samples. Here we show, in a cross-sectional study of 67 mothers and 64 newborns
from the Krakow Region of Poland, that aromatic-DNA adducts measured by 32 P-postlabeling are positively associated with HPRT mutant frequency in the newborns (β = 0.56, P = 0.03) after controlling for exposure to tobacco smoke, diet, and socioeconomic status. In contrast to the fetus, HPRT mutations and DNA adducts do not reflect similar exposure periods in the mother, and the maternal biomarkers were not correlated.
Adducts were higher in the newborn than the mother, indicating differential susceptibility of the fetus to DNA damage; but
HPRT mutation frequency was 4-fold lower, consistent with the long lifetime of the biomarker. These results provide the first
demonstration of a molecular link between somatic mutation in the newborn and transplacental exposure to common air pollutants,
a finding that is relevant to cancer risk assessment. Transplacental exposure to carcinogenic air pollutants from the combustion of fossil fuels is a growing health concern, given evidence of the heightened susceptibility of the fetus. These mutagenic/carcinogenic pollutants include aromatic compounds such as polycyclic aromatic hydrocarbons that bind to DNA, forming chemical-DNA adducts. We have investigated the genotoxic effects of transplacental exposure in humans by analyzing aromatic-DNA adducts and the frequency of gene mutations at the hypoxanthine-guanine phosphoribosyltransferase (HPRT) locus in umbilical cord and maternal blood samples. Here we show, in a cross-sectional study of 67 mothers and 64 newborns from the Krakow Region of Poland, that aromatic-DNA adducts measured by (32)P-postlabeling are positively associated with HPRT mutant frequency in the newborns (beta = 0.56, P = 0.03) after controlling for exposure to tobacco smoke, diet, and socioeconomic status. In contrast to the fetus, HPRT mutations and DNA adducts do not reflect similar exposure periods in the mother, and the maternal biomarkers were not correlated. Adducts were higher in the newborn than the mother, indicating differential susceptibility of the fetus to DNA damage; but HPRT mutation frequency was 4-fold lower, consistent with the long lifetime of the biomarker. These results provide the first demonstration of a molecular link between somatic mutation in the newborn and transplacental exposure to common air pollutants, a finding that is relevant to cancer risk assessment. |
Author | Robin Whyatt Yanzhi Hsu Regina Santella Frederica Perera Wieslaw Jedrychowski Richard Albertini Ulka Campbell James P. O’Neill Karl Hemminki |
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Keywords | Human Exposure Mutagen In utero Somatic mutation Carcinogen Newborn Mother DNA Cytogenetics Female Air pollution Aromatic compound Molecular biology |
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Snippet | Transplacental exposure to carcinogenic air pollutants from the combustion of fossil fuels is a growing health concern, given
evidence of the heightened... Transplacental exposure to carcinogenic air pollutants from the combustion of fossil fuels is a growing health concern, given evidence of the heightened... |
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SubjectTerms | Adult Air Biological and medical sciences Carcinogenesis, carcinogens and anticarcinogens Chemical agents Cross-Sectional Studies DNA Adducts DNA Damage DNA Mutational Analysis Embryonic and Fetal Development Environmental Exposure Environmental Pollutants - adverse effects Environmental pollutants toxicology Female Humans Hypoxanthine Phosphoribosyltransferase - genetics Infant, Newborn Male Maternal-Fetal Exchange Medical sciences Poland Pregnancy Toxicology Tumors Umbilical Cord |
Title | In Utero DNA Damage from Environmental Pollution Is Associated with Somatic Gene Mutation in Newborns |
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