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- W1915207767 abstract "It has been hypothesized that high concentrations of tissue iron may enhance carcinogenesis induced by free radical mechanisms. Wy-14,643 is a peroxisome proliferator that is hepatocarcinogenic in rats. Tumor induction may result in part from excessive production of reactive oxygen species, particularly H2O2. The purpose of this study was to examine the effect of iron status on oxidative stress and NF-κB activation in livers of rats treated with Wy-14,643. Forty-eight male Sprague–Dawley rats were fed one of four diets (20, 45, 650, 1500 mg Fe/kg diet) for 28 d. At the time of tissue collection, liver iron ranged from 1.4 to 9.9 μmol/g wet tissue in the diet groups. Wy-14,643 (0 or 0.1 g/100 g diet) was added to the diet for the final 10 d of the study. Wy-14,643 doubled the liver weight/body weight ratio (P = 0.0001), which was also increased by iron supplementation (P < 0.01). Iron supplementation increased thiobarbituric acid reactive substances and/or conjugated dienes, but there was no synergism between Wy 14,643 and iron on lipid peroxidation measures. The hepatic DNA binding activity of NF-κB was increased in rats administered Wy-14,643. However, differences in liver iron concentration did not alter activation of NF-κB in untreated rats or in those treated with Wy-14,643. DNA double-strand breakage was not affected by iron or Wy-14,643. In summary, although moderate changes in iron status altered liver lipid peroxidation, iron did not significantly increase oxidative stress induced by a hepatocarcinogenic peroxisome proliferator." @default.
- W1915207767 created "2016-06-24" @default.
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- W1915207767 date "2002-09-01" @default.
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- W1915207767 title "Moderate Iron Overload Enhances Lipid Peroxidation in Livers of Rats, but Does Not Affect NF-κB Activation Induced by the Peroxisome Proliferator, Wy-14,643" @default.
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- W1915207767 doi "https://doi.org/10.1093/jn/132.9.2525" @default.
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