DNA damage, DNA repair rates and mRNA expression levels of cell cycle genes (TP53, p21(CDKN1A), BCL2 and BAX) with respect to occupational exposure to styrene
Language English Country Great Britain, England Media print-electronic
Document type Journal Article, Research Support, Non-U.S. Gov't
PubMed
20966084
DOI
10.1093/carcin/bgq213
PII: bgq213
Knihovny.cz E-resources
- MeSH
- Genes, cdc drug effects MeSH
- Adult MeSH
- Gene Expression drug effects MeSH
- Cyclin-Dependent Kinase Inhibitor p21 drug effects genetics MeSH
- Humans MeSH
- RNA, Messenger analysis MeSH
- Tumor Suppressor Protein p53 drug effects genetics MeSH
- DNA Repair drug effects MeSH
- Polymerase Chain Reaction MeSH
- DNA Damage drug effects MeSH
- Occupational Exposure adverse effects MeSH
- bcl-2-Associated X Protein drug effects genetics MeSH
- Proto-Oncogene Proteins c-bcl-2 drug effects genetics MeSH
- Styrene adverse effects MeSH
- Check Tag
- Adult MeSH
- Humans MeSH
- Male MeSH
- Female MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Names of Substances
- CDKN1A protein, human MeSH Browser
- Cyclin-Dependent Kinase Inhibitor p21 MeSH
- RNA, Messenger MeSH
- Tumor Suppressor Protein p53 MeSH
- bcl-2-Associated X Protein MeSH
- Proto-Oncogene Proteins c-bcl-2 MeSH
- Styrene MeSH
We studied the relationship between DNA damage, DNA repair rates and messenger RNA (mRNA) expression levels of cell cycle genes TP53, p21(CDKN1A), BCL2 and BAX in a group of 71 styrene-exposed workers and 51 control individuals. The exposure was assessed by measuring the concentration of styrene at workplace and in blood. Parameters of DNA damage [measured as single-strand breaks (SSBs) and endonuclease III-sensitive sites], γ-irradiation-specific DNA repair rates and mRNA levels of studied genes were analyzed in peripheral blood lymphocytes. The workers were divided into low (<50 mg/m³) and high (>50 mg/m³) styrene exposure groups. We found negative correlations between mRNA expression of TP53, BCL2, BAX and styrene exposure (P < 0.001 for all parameters). In contrast, p21(CDKN1A) mRNA expression significantly increased with increasing styrene exposure (P = 0.001). SSBs and endonuclease III-sensitive sites increased with increasing mRNA levels of TP53 (P < 0.001 for both) and BCL2 (P = 0.038, P = 0.002, respectively), whereas the same parameters decreased with increasing mRNA levels of p21(CDKN1A) (P < 0.001, P = 0.007, respectively). γ-Irradiation-specific DNA repair rates increased with p21(CDKN1A) mRNA levels up to the low exposure level (P = 0.044). Our study suggests a possible relationship between styrene exposure, DNA damage and transcript levels of key cell cycle genes.
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