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National Institute of Environmental Health Sciences

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Your Environment. Your Health.

Publication Detail

Title: CpG site-specific methylation as epi-biomarkers for the prediction of health risk in PAHs-exposed populations.

Authors: Ye, Lizhu; He, Zhini; Li, Daochuan; Chen, Liping; Chen, Shen; Guo, Ping; Yu, Dianke; Ma, Lu; Niu, Yong; Duan, Huawei; Xing, Xiumei; Xiao, Yongmei; Zeng, Xiaowen; Wang, Qing; Dong, Guanghui; Aschner, Michael; Zheng, Yuxin; Chen, Wen

Published In J Hazard Mater, (2022 Jun 05)

Abstract: Environmental insults can lead to alteration in DNA methylation of specific genes. To address the role of altered DNA methylation in prediction of polycyclic aromatic hydrocarbons (PAHs) exposure-induced genetic damage, we recruited two populations, including diesel engine exhausts (low-level) and coke oven emissions (high-level) exposed subjects. The positive correlation was observed between the internal exposure marker (1-hydroxypyrene) and the extents of DNA damage (P < 0.05). The methylation of representative genes, including TRIM36, RASSF1a, and MGMT in peripheral blood lymphocytes was quantitatively examined by bisulfite-pyrosequencing assay. The DNA methylation of these three genes in response to PAHs exposure were changed in a CpG-site-specific manner. The identified hot CpG site-specific methylation of three genes exhibited higher predictive power for DNA damage than the respective single genes in both populations. Furthermore, the dose-response relationship analysis revealed a nonlinear U-shape curve of TRIM36 or RASSF1a methylation in combined population, which led to determination of the threshold of health risk. Furthermore, we established a prediction model for genetic damage based on the unidirectional-alteration MGMT methylation levels. In conclusion, this study provides new insight into the application of multiple epi-biomarkers for health risk assessment upon PAHs exposure.

PubMed ID: 35231813 Exiting the NIEHS site

MeSH Terms: Biomarkers/metabolism; Coke*/analysis; DNA Damage; DNA Methylation; Humans; Occupational Exposure*/analysis; Polycyclic Aromatic Hydrocarbons*/analysis; Polycyclic Aromatic Hydrocarbons*/toxicity

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