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International Archives of Occupational and Environmental Health

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Open Access 01-01-2011 | Original Article

White blood cell DNA adducts in a cohort of asthmatic children exposed to environmental tobacco smoke

Authors: Stephen E. Wilson, Glenn Talaska, Robert S. Kahn, Brenda Schumann, Jane Khoury, Anthony C. Leonard, Bruce P. Lanphear

Published in: International Archives of Occupational and Environmental Health | Issue 1/2011

Abstract

Purpose

Exposure to environmental tobacco smoke (ETS) leads to molecular damage in the form of DNA adducts. While lung cancer risk is higher among African Americans compared to White Americans, a few studies have tested for racial differences in DNA adducts among children exposed to ETS. The purpose of this study was to test whether African American children have higher DNA adducts levels compared to White children adjusted for ETS exposure.

Methods

Data and biologic specimens were drawn from an existing cohort of 212 asthmatic children. These subjects participated in a 12-month ETS-reduction trial that employed HEPA air cleaners with active filter cartridges and sham filter cartridges. White blood cell (WBC) DNA was analyzed for DNA adducts using ³²P-postlabeling. We assessed ETS exposure using a validated air nicotine dosimeter. We determined the independent relationship between African American race and DNA adduct levels adjusted for ETS exposure and air cleaner use.

Results

The mean age of the subjects was 8.4 years; 55% were African American. There was no difference in DNA adduct levels between African American and White children (11.8 vs. 11.2 adducts per 10⁹ nucleotides, p = 0.86), despite slightly higher levels of air nicotine exposure (3.4 vs. 2.2 μg/m³, p = 0.14). African American children used their air cleaners less often than White children. We found that the best predictor of DNA adduct levels was the duration of air cleaner use (r = −0.133, p = 0.056). This association was independent of cartridge type.

Conclusions

We did not see differences in adduct levels by race even after accounting for the level of ETS exposure. However, there was a marginal inverse association between air cleaner use and adducts. Additional research is required to understand this phenomenon.

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Title: White blood cell DNA adducts in a cohort of asthmatic children exposed to environmental tobacco smoke
Authors: Stephen E. Wilson
Glenn Talaska
Robert S. Kahn
Brenda Schumann
Jane Khoury
Anthony C. Leonard
Bruce P. Lanphear
Publication date: 01-01-2011
Publisher: Springer-Verlag
Published in: International Archives of Occupational and Environmental Health / Issue 1/2011
Print ISSN: 0340-0131
Electronic ISSN: 1432-1246
DOI: https://doi.org/10.1007/s00420-010-0529-z

At a glance: The STEP trials

Springer Medicine

White blood cell DNA adducts in a cohort of asthmatic children exposed to environmental tobacco smoke

Abstract

Purpose

Methods

Results

Conclusions

At a glance: The STEP trials

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusions

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