Urinary 1‐hydroxypyrene and 8‐hydroxydeoxyguanosine Levels among Coke‐oven Workers for 2 Consecutive Days

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  • Nguyen Thi-To-Uyen
    Department of Health Policy and Management, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health Department of Social Medicine, Thai Nguyen University of Medicine and Pharmacy
  • Kawanami Shoko
    Department of Health Policy and Management, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health
  • Kawai Kazuaki
    Department of Environmental Oncology, Institute of Occupational and Industrial Ecological Sciences, University of Occupational and Environmental Health
  • Kasai Hiroshi
    Department of Environmental Oncology, Institute of Occupational and Industrial Ecological Sciences, University of Occupational and Environmental Health
  • Li Yun-Shan
    Department of Environmental Oncology, Institute of Occupational and Industrial Ecological Sciences, University of Occupational and Environmental Health
  • Inoue Jinro
    Department of Health Policy and Management, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health
  • Ngoan Le Tran
    Department of Occupational Health, Hanoi Medical University
  • Horie Seichi
    Department of Health Policy and Management, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health

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  • Urinary 1-hydroxypyrene and 8-hydroxydeoxyguanosine Levels among Coke-oven Workers for 2 Consecutive Days

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Objectives: This study evaluated the levels of exposure to polycyclic aromatic hydrocarbons (PAHs) and their relationship with oxidative DNA damage among Vietnamese coke-oven workers. Methods: We collected urine from 36 coke-oven workers (exposed group) at the beginning and end of the shift on 2 consecutive days. We also collected urine from 78 medical staff (control group). Information was collected by questionnaire about smoking status, drinking habit, and working position. Urinary 1-hydroxypyrene (1-OHP) and 8-hydroxydeoxyguanosine (8-OH-dG) were measured using HPLC. All statistical analyses were performed with SPSS version 19. Results: Urinary 1-OHP was significantly higher in the coke-oven workers than in the control group (p<0.05). Top-oven workers had the highest levels of internal exposure to PAHs, followed by side-oven and then bottom-oven workers (5.41, 4.41 and 1.35 ng/mg creatinine, respectively, at the end of the shift on day 2). Urinary 8-OH-dG was significantly higher in top- and side-oven workers at the end of the shift on day 2 (4.63 and 5.88 ng/mg creatinine, respectively) than in the control group (3.85 ng/mg creatinine). Based on a multi-regression analysis, smoking status had a significant effect on urinary 8-OH-dG (p=0.049). Urinary 1-OHP tended to have a positive correlation with urinary 8-OH-dG (p=0.070). Conclusions: Vietnamese coke-oven workers were exposed to PAHs during their work shift. Urinary 1-OHP exceeded the recommended limit, and elevated oxidative DNA damage occurred in top- and side-oven workers on the second day of work. A tendency for positive correlation was found between urinary 1-OHP and urinary 8-OH-dG.(J Occup Health 2014; 56: 178-185)

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