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Biomarker studies in northern Bohemia
B Binková1, J Lewtas, I Mísková
1Institute of Experimental medicine, Academy of Sciences of the Czech Republic, Prague, Czech Republic. bbinkova@biomed.cas.cz
Environmental Health Perspectives
|May 1, 1996
Summary
This study found significant correlations between personal exposure to polycyclic aromatic hydrocarbons (PAHs) and DNA adducts in women working outdoors. Genetic factors like GSTM1 influence biomarkers, but PAH exposure remains a key driver of biological effects.
Area of Science:
- Environmental Health
- Toxicology
- Biomarker Research
Background:
- Air pollution, specifically polycyclic aromatic hydrocarbons (PAHs), poses significant health risks.
- Biomarkers are crucial for assessing exposure, biological dose, and genetic effects.
- Understanding metabolic susceptibility, such as GSTM1 genotype, is vital in toxicological studies.
Purpose of the Study:
- To evaluate personal exposure to airborne PAHs and associated biomarkers in outdoor workers.
- To investigate the relationship between PAH exposure, genetic factors (GSTM1), and various biological effect biomarkers.
- To determine the relative contribution of PAH exposure versus genetic factors on biomarker variability.
Main Methods:
- Simultaneous assessment of personal PAH exposure and a suite of biomarkers including PAH metabolites, DNA adducts, and DNA damage (comet assay).
- Utilized 32P-postlabeling for PAH-DNA adducts and ELISA for PAH-albumin adducts.
- Included genetic analysis for glutathione S-transferase M1 (GSTM1) polymorphism.
Main Results:
- Highly significant correlations were observed between personal PAH exposure and DNA adducts in both pilot and follow-up studies.
- Comet assay parameters (%T) showed a significant correlation with exposure to respirable particles.
- GSTM1 genotype influenced certain biomarkers, but multifactor analysis indicated personal PAH exposure had a greater impact on biomarker variability.
Conclusions:
- Personal exposure to PAHs is a significant factor influencing DNA adducts and other biomarkers of exposure and effect.
- While GSTM1 genotype plays a role, environmental PAH exposure appears to be a stronger determinant of biomarker levels in this cohort.
- Comprehensive assessment considering both exposure and individual susceptibility factors is essential for accurate risk evaluation.