title: Elevated levels of urinary 8-hydroxy-2'-deoxyguanosine in male electrical and electronic equipment dismantling workers exposed to high concentrations of polychlorinated dibenzo-p-dioxins and dibenzofurans, polybrominated diphenyl ethers, and polychlorinated biphenyls.
abstract: To investigate the occupational exposure levels to polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs), polybrominated diphenyl ethers (PBDEs), and polychlorinated biphenyls (PCBs), indoor dust (n = 3) in workshops and hair samples from male workers (n = 64) were collected at two electrical and electronic equipmentwaste (E-waste) dismantling factories located in the LQ area in east China in July 11--13, 2006. Pre- and postworkshift urines (64 of each) were also collected from the workers to study oxidative damage to DNA using 8-hydroxy-2'-deoxyguanosine (8-OHdG) as a biomarker. The concentrations of PCDD/Fs, PCDD/F-WHO-TEQs, PBDEs, PCBs and PCB-WHO-TEQs were (50.0 +/- 8.1) x 10(3), 724.1 +/- 249.6, (27.5 +/- 5.8) x 10(6), (1.6 +/- 0.4) x 10(9), (26.2 +/- 3.0) x 10(3) pg/g dry weight (dw) in dust, and (2.6 +/- 0.6) x 10(3),42.4 +/- 9.3, (870.8 +/- 205.4) x 10(3), (1.6 +/- 0.2) x 10(6), 41.5 +/- 5.5 pg/g dw in hair, respectively. The homologue and congener profiles in the samples demonstrated that high concentrations of PCDD/Fs, PBDEs, and PCBs were originated from open burning of E-waste. The 8-OHdG levels were detected at 6.40 +/- 1.64 micromol/mol creatinine in preworkshift urines. However, the levels significantly increased to 24.55 +/- 5.96 micromol/mol creatinine in postworkshift urines (p < 0.05). Then, it is concluded that there is a high cancer risk originated from oxidative stress indicated by the elevated 8-OHdG levels in the E-waste dismantling workers exposed to high concentrations of PCDD/Fs, PBDEs, and PCBs.
authors.affiliation: State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, P.R. China.
authors.forename: Sheng
authors.initials: S
authors.lastname: Wen
authors.forename: Fang-Xing
authors.initials: FX
authors.lastname: Yang
authors.forename: Yan
authors.initials: Y
authors.lastname: Gong
authors.forename: Xiao-Ling
authors.initials: XL
authors.lastname: Zhang
authors.forename: Yang
authors.initials: Y
authors.lastname: Hui
authors.forename: Jing-Guang
authors.initials: JG
authors.lastname: Li
authors.forename: Ai-Ling
authors.initials: AL
authors.lastname: Liu
authors.forename: Yong-Ning
authors.initials: YN
authors.lastname: Wu
authors.forename: Wen-Qing
authors.initials: WQ
authors.lastname: Lu
authors.forename: Ying
authors.initials: Y
authors.lastname: Xu
mesh_terms: D000080242:8-Hydroxy-2'-Deoxyguanosine; D000293:Adolescent; D000328:Adult; D000395:Air Pollutants, Occupational / Q000032:analysis*; D003849:Deoxyguanosine / Q000031:analogs & derivatives* / Q000652:urine; D004391:Dust / Q000032:analysis; D004581:Electronics; D004784:Environmental Monitoring; D006197:Hair / Q000737:chemistry; D006801:Humans; D008297:Male; D008875:Middle Aged; D016273:Occupational Exposure / Q000032:analysis*; D010647:Phenyl Ethers / Q000032:analysis*; D011075:Polybrominated Biphenyls / Q000032:analysis*; D011078:Polychlorinated Biphenyls / Q000032:analysis*; D000072317:Polychlorinated Dibenzodioxins / Q000031:analogs & derivatives* / Q000032:analysis; D018505:Waste Management
chemical_list: D000395:Air Pollutants, Occupational; D004391:Dust; D010647:Phenyl Ethers; D011075:Polybrominated Biphenyls; D000072317:Polychlorinated Dibenzodioxins; D000080242:8-Hydroxy-2'-Deoxyguanosine; D011078:Polychlorinated Biphenyls; D003849:Deoxyguanosine