Changes in poly(ADP-ribosyl)ation patterns in workers exposed to BTX

• Published in: PloS one 2014-09, Vol.9 (9), p.e106146
• Main Authors: Sha, Yan, Zhou, Wei, Yang, Zhenyu, Zhu, Xiaoling, Xiang, Yingping, Li, Tiandi, Zhu, Dexiang, Yang, Xinyue
• Format: Article
• Language: English
• Subjects: Aberration; Acute myeloid leukemia; Adenosine diphosphate; ADP-ribosylation; Adult; Airborne sensing; Benzene; Benzene - poisoning; Biology and Life Sciences; Cancer; Case-Control Studies; Chemical compounds; Chromatography; Containers; CpG islands; Cytokinesis; Cytokinesis - drug effects; Cytotoxicity; Damage detection; Deoxyribonucleic acid; Disease prevention; DNA; DNA (Cytosine-5-)-Methyltransferase 1; DNA (Cytosine-5-)-Methyltransferases - metabolism; DNA damage; DNA methylation; DNA-Binding Proteins - metabolism; DNMT1 protein; Employment; Environmental monitoring; Enzymes; Exposure; Family medical history; Female; Gene expression; Hematologic Tests; Hematology; Humans; Hydrocarbons; Leukemia; Lymphocytes; Male; Medicine and Health Sciences; Metabolism; Metabolites; Methylation; Micronuclei, Chromosome-Defective - drug effects; Myeloid leukemia; Occupational diseases; Occupational exposure; Occupational Exposure - adverse effects; Occupational hazards; Occupational health; Poisoning; Poly Adenosine Diphosphate Ribose - metabolism; Poly(ADP-ribose); Poly(ADP-ribose) glycohydrolase; Poly(ADP-ribose) polymerase; Poly(ADP-ribose) Polymerase 1; Poly(ADP-ribose) Polymerases - metabolism; Real-Time Polymerase Chain Reaction; Ribose; RNA, Messenger - genetics; RNA, Messenger - metabolism; Studies; Toluene; Toluene - poisoning; Toxicity; Workforce; Xylene; Xylenes - poisoning
• ISSN: 1932-6203; 1932-6203
• DOI: 10.1371/journal.pone.0106146

Occupational exposure to (benzene, toluene and xylene, BTX is common in the Chinese workplace. Chronic occupational exposure to benzene is associated with an increased risk of hematological malignancies such as acute myeloid leukemia (AML), but the underlying mechanisms are still unclear. This study investigates changes in poly(ADP-ribosyl)ation and DNA methylation in subjects occupationally exposed to a BTX. Blood DNA samples and exposure data were obtained from subjects with different levels of exposure, including 132 decorators, 129 painters, and 130 unexposed referents in a container-manufacturing factory in Shenzhen, China. Occupational exposure assessment included personal monitoring of airborne benzene, toluene and xylene. Hematological parameters were measured and the cytokinesis-block micronucleus (CBMN) assay was used to detect DNA damage in peripheral lymphocytes. Quantitative real-time PCR was used to detect the mRNA expression of poly(ADP-ribose) polymerase 1 (PARP1) and poly(ADP-ribose) glycohydrolase (PARG), DNA methyltransferases (DNMTs) including DNMT1, DNMT3a and DNMT3b, methyl-CpG-binding domain protein 2(MBD2). PARP1 assay was used to measure PARP activity. Airborne levels of benzene, toluene and xylene in the two exposed groups were significantly higher than those of controls (P