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Modifying Effect of Bisphenol A on the Preneoplastic and Neoplastic Lesions of Rat Liver Treated with Diethylnitrosamine Infusion  

Park, Ki-Dae (National Institute of Toxicological Research, Korea Food & Drug Administration)
Han, Beom-Seok (National Institute of Toxicological Research, Korea Food & Drug Administration)
Rhim, Kook-Hwan (College of Health Sciences, Korea University)
Publication Information
Journal of Environmental Health Sciences / v.32, no.1, 2006 , pp. 60-66 More about this Journal
Abstract
Bisphenol A(BPA) was known as an endocrine disrupting chemical. This study was conducted to assess the effect of BPA, weaker estrogen, on the preneoplastic and neoplastic lesions induced by diethylnitrosamine (DEN). One hundred male F344 rats were divided into four groups which were treated with DEN followed by BPA. To make liver tumor early, we conducted that DEN containing osmotic pump implanted into rat abdominal cavity. Then diet containing BPA were fed to the rats. All animals were sacrificed at 10 and 18 weeks. Body weights were significantly decreased in 4000ppm at 18 weeks. Relative Liver weights of 4000 ppm BPA treated group were significantly increased compared to that of DEN alone group at 18 weeks. There were no significant differences of liver tumor incidences. Sum area of GST-P positive foci and BrdU labeling indices of BPA treated group were not significantly different compared to those of control group. These results suggest that BPA have no effects in preneoplastic and neoplastic lesions on DEN-induced hepatocarcinogenesis.
Keywords
Bisphenol A; DEN; preneoplastic lesion; hepatocarcinogenesis;
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