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Evaluation of in vivo genotoxic potential of fenofibrate in rats subjected to two-week repeated oral administration

  • Genotoxicity and Carcinogenicity
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Abstract

Fenofibrate (FF), a peroxisome proliferator-activated receptor-alpha agonist, has been used as one of the hypolipidemic drugs in man and induces oxidative stress and promotes hepatocarcinogenesis in the liver of rodents. This chemical belongs to a class of non-genotoxic carcinogens, but DNA damage secondary to oxidative stress resulting from reactive oxygen species (ROS) generation is suspected in rodents given this chemical. To examine whether FF has genotoxic potential, partially hepatectomized F344 male rats were treated orally with 0, 1,000 or 2,000 mg/kg of FF for 2 weeks, followed by diet containing 0.15% 2 acetyl aminofluorene (2 AAF) for enhancement the tumor-promoting effect for 10 days and a single oral dose of carbon tetrachloride (CCl4) as the first experiment (liver initiation assay). As the second experiment, the in vivo liver comet assay was performed in hepatectomized rats, and the expression of some DNA repair genes was examined. In the liver initiation assay, the number and area of glutathione S-transferase placental form (GST-P)-positive single cells and foci did not increase in the FF treated groups. In the comet assay, positive results were obtained after 3 h of the last treatment of FF, and the expression of some DNA repair genes such as Apex1, Ogg1 and Mlh1 were upregulated in rats given the high dose of FF at 3 h after the treatment but not in 24 h after the treatment. The results of the present study suggest that FF causes some DNA damage in livers of rats, but is not a strong genotoxic substance leading to a DNA mutation since such DNA damage was repaired by the increased activity of some DNA repair genes.

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Authors and Affiliations

  1. Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo, 183-8509, Japan

    Mohammad Monir Tawfeeq, Terumasa Suzuki, Keisuke Shimamoto, Hitomi Hayashi, Makoto Shibutani & Kunitoshi Mitsumori

  2. Department of Environmental Conservation, Graduate School of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo, 183-8509, Japan

    Mohammad Monir Tawfeeq

  3. Department of Clinical Science, Faculty of Veterinary Science, Kabul University, Jamal Mina, Kabul, Afghanistan

    Mohammad Monir Tawfeeq

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  1. Mohammad Monir Tawfeeq
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  2. Terumasa Suzuki
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  3. Keisuke Shimamoto
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Correspondence to Kunitoshi Mitsumori.

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Tawfeeq, M.M., Suzuki, T., Shimamoto, K. et al. Evaluation of in vivo genotoxic potential of fenofibrate in rats subjected to two-week repeated oral administration. Arch Toxicol 85, 1003–1011 (2011). https://doi.org/10.1007/s00204-010-0628-3

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  • DOI: https://doi.org/10.1007/s00204-010-0628-3

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