Related Experiment Videos
Biomarkers in styrene-exposed boatbuilders
D D Brenner1, A M Jeffrey, L Latriano
1Division of Environmental Sciences, Columbia University School of Public Health, New York, NY 10032.
Mutation Research
|November 1, 1991
Summary
Occupational exposure to styrene, even below 50 ppm, can cause cellular damage. Biomarkers like micronuclei and DNA breaks indicate harm in fiberglass-reinforced plastics boatbuilders.
Area of Science:
- Occupational Health
- Toxicology
- Molecular Biology
Background:
- Fiberglass-reinforced plastics (FRP) boatbuilders may be exposed to styrene.
- Styrene exposure is a concern in occupational settings.
- Biomarkers can indicate exposure and cellular damage.
Purpose of the Study:
- To compare biomarkers in FRP boatbuilders exposed to styrene versus unexposed controls.
- To assess the impact of occupational styrene exposure on cellular and molecular biomarkers.
- To evaluate the utility of biomarker panels in identifying harmful exposures.
Main Methods:
- Compared 14 FRP boatbuilders with 9 controls.
- Measured styrene-hemoglobin adducts, sister-chromatid exchanges (SCEs), micronuclei (MN), single-strand breaks (SSBs), and N-acetoxy-2-acetylaminofluorene-induced DNA binding (NA-AAF binding).
- Assessed styrene exposure via air monitoring (8-h TWA) and urinary mandelic acid levels.
Main Results:
- Significant differences in MN, SSBs, and NA-AAF binding between exposed workers and controls.
- No significant differences in SCEs.
- Average styrene exposure was 11 ppm, with urinary mandelic acid equivalent to 15 ppm.
Conclusions:
- Occupational styrene exposure below the OSHA standard (50 ppm) can induce cellular/molecular damage.
- Biomarker panels are effective in identifying potentially harmful styrene exposures.
- Styrene-Hb adducts showed a large, non-significant difference due to one highly exposed individual.