期刊
CLINICAL TOXICOLOGY
卷 51, 期 4, 页码 225-229出版社
TAYLOR & FRANCIS LTD
DOI: 10.3109/15563650.2013.782410
关键词
Lead exposure; Occupational health; LINE-1; DNA methylation
类别
资金
- Wuxi Health Bureau Planned Projects for Scientific Research Funds [CSEW1N1102]
- Wuxi Technology Bureau Planned Projects for Scientific Research Funds [CSZ01050]
- Medical Scientific Research Foundations, Department of Health, Jiangsu Province [H201246]
Context. Occupational and environmental exposures to lead (Pb) are a worldwide concern. DNA methylation plays an important role in the development of Pb toxicity. Here, we try to find out the evidence to prove that the methylation of the LINE-1 promoter may be involved in Pb toxicity. Methods. To determine whether the methylation level of the LINE-1 is associated with the risk of Pb poisoning, we first constructed a Pb acetate-treated cell model to detect the association between LINE-1 methylation and Pb exposure. A case-control study involving 53 workers from a battery plant and 57 healthy volunteers with matching age and gender distribution was carried out. We employed methylation-specific real-time PCR to determine the relationship between LINE-1 methylation level and Pb exposure. Results. In the cell model, Pb exposure significantly decreased the level of LINE-1 methylation (p = 0.009). Significant difference in methylation frequencies was found between the exposed and control samples (p < 0.001). We also found a decreasing trend of LINE-1 methylation level with increasing blood Pb level (p < 0.001). Conclusions. Therefore, the LINE-1 promoter methylation might contribute to the risk of Pb poisoning and identified a possible epigenetic biomarker for Pb toxicity, especially in individuals occupationally exposed to Pb.
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