Urinary 8-Hydroxy-2'-Deoxyguanosine Levels and Cardiovascular Disease Incidence in Japan

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  • Nagao Masanori
    Department of Public Health, School of Medicine, Dokkyo Medical University Office of Epidemiology, Radiation Medical Science Center for the Fukushima Health Management Survey, Fukushima Medical University Department of Epidemiology, School of Medicine, Fukushima Medical University
  • Kobashi Gen
    Department of Public Health, School of Medicine, Dokkyo Medical University
  • Umesawa Mitsumasa
    Department of Public Health, School of Medicine, Dokkyo Medical University
  • Cui Renzhe
    Public Health, Department of Social Medicine, Osaka University Graduate School of Medicine
  • Yamagishi Kazumasa
    Department of Public Health Medicine, Faculty of Medicine, and Health Services Research and Development Center, University of Tsukuba Ibaraki Western Medical Center
  • Imano Hironori
    Public Health, Department of Social Medicine, Osaka University Graduate School of Medicine
  • Okada Takeo
    Osaka Center for Cancer and Cardiovascular Diseases Prevention
  • Kiyama Masahiko
    Osaka Center for Cancer and Cardiovascular Diseases Prevention
  • Kitamura Akihiko
    Tokyo Metropolitan Institute of Gerontology
  • Sairenchi Toshimi
    Department of Public Health, School of Medicine, Dokkyo Medical University
  • Haruyama Yasuo
    Department of Public Health, School of Medicine, Dokkyo Medical University
  • Ohira Tetsuya
    Office of Epidemiology, Radiation Medical Science Center for the Fukushima Health Management Survey, Fukushima Medical University Department of Epidemiology, School of Medicine, Fukushima Medical University
  • Iso Hiroyasu
    Public Health, Department of Social Medicine, Osaka University Graduate School of Medicine
  • for the CIRCS Investigators

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<p>Aim: The association between urinary 8-hydroxy-2'-deoxyguanosine (8-OHdG), an oxidative stress marker, and the incidence of cardiovascular disease (CVD) has not been confirmed because no previous studies evaluated 24-hour 8-OHdG excretion levels in the general population. We aimed to confirm the association between 24-hour urinary 8-OHdG levels and CVD risk among Japanese men and women. </p><p>Methods: A nested case-control study was performed based on a 24-hour urine collection in a community-based cohort study performed from 1996 to 2005. Seventy-six cases (55 men and 21 women) who experienced their first CVD incidence during the follow-up period (median: 5.9 years) were recruited. The controls were frequency-matched 1:2, with each case for sex, age, area of residence, and baseline year. The 8-OHdG level was measured by enzyme-linked immunosorbent assay. Odds ratios (ORs) and 95% confidence intervals (CIs) were calculated using conditional logistic regression models adjusted for body mass index, ethanol intake, smoking status, and estimated glomerular filtration rate. </p><p>Results: The geometric mean and geometric standard deviation (SD) of 8-OHdG levels (nmol/day) for cases and controls were 35.5 (1.55) and 35.5 (1.54) for men and 32.1 (1.35) and 25.0 (1.39) for women, respectively. The multivariable OR (95% CI) of CVD incidence according to the 1-SD increment of the log-transformed 8-OHdG level was 2.08 (0.99–4.37) for women. The multivariable ORs (95% CIs) for the 1st (lowest) and 4th versus 2nd quartile according to 8-OHdG for men were 3.29 (1.02-10.61) and 2.77 (0.96–7.96), respectively. </p><p>Conclusion: A high 8-OHdG level tended to be associated with CVD incidence among women.</p>

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