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Hirano T, Higashi K, Sakai A, Tsurudome Y, Ootsuyama Y, RieKido, Kasai H. Analyses of oxidative DNA damage and its repair activity in the livers of 3'-methyl-4-dimethylaminoazobenzene-treated rodents. Jpn J Cancer Res 2000; 91:681-5. [PMID: 10920274 PMCID: PMC5926408 DOI: 10.1111/j.1349-7006.2000.tb00999.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
We measured the levels of 8-hydroxyguanine (8-OH-Gua) and its repair activity in the livers of the Donryu rat, the carcinogen-resistant DRH rat, and the ddy mouse, which were fed a 0.06% 3'-methyl-4-dimethylaminoazobenzene (3'-MeDAB)-containing diet. In a short-term rat experiment (maximum 2 months), 3'-MeDAB did not increase the 8-OH-Gua levels in the livers of the two rat strains, although it significantly increased the repair activity in only the Donryu rat liver at 1 and 2 months. After long-term 3'-MeDAB administration to the ddy mouse (8 months), the levels of 8-OH-Gua and its repair activity were increased in the liver by 3.6-fold and 1.6-fold, respectively. These experiments suggest that 3'-MeDAB increases 8-OH-Gua generation in rodent liver DNA and the 8-OH-Gua repair assay is a reliable marker of cellular oxidative stress induced by carcinogens.
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Affiliation(s)
- Takeshi Hirano
- Departments of Environmental Oncology, School of Medicine, University of Occupational and Environmental Health, Japan, 1–1 Iseigaoka, Yahatanishi‐ku, Kitakyushu 807– 8555
| | - Ken Higashi
- Departments of Biochemistry, School of Medicine, University of Occupational and Environmental Health, Japan, 1–1 Iseigaoka, Yahatanishi‐ku, Kitakyushu 807– 8555
| | - Akinori Sakai
- Departments of Orthopedics, School of Medicine, University of Occupational and Environmental Health, Japan, 1–1 Iseigaoka, Yahatanishi‐ku, Kitakyushu 807– 8555
| | - Yosuke Tsurudome
- Departments of Environmental Oncology, School of Medicine, University of Occupational and Environmental Health, Japan, 1–1 Iseigaoka, Yahatanishi‐ku, Kitakyushu 807– 8555
| | - Yuko Ootsuyama
- Departments of Environmental Oncology, School of Medicine, University of Occupational and Environmental Health, Japan, 1–1 Iseigaoka, Yahatanishi‐ku, Kitakyushu 807– 8555
| | - RieKido
- Departments of Environmental Oncology, School of Medicine, University of Occupational and Environmental Health, Japan, 1–1 Iseigaoka, Yahatanishi‐ku, Kitakyushu 807– 8555
| | - Hiroshi Kasai
- Departments of Environmental Oncology, School of Medicine, University of Occupational and Environmental Health, Japan, 1–1 Iseigaoka, Yahatanishi‐ku, Kitakyushu 807– 8555
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