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- W2006307559 abstract "The in vivo paraquat-induced oxidative stress in rat tissue was studied by analyzing cholesterol-derived hydroperoxide as an index of lipid peroxidation. Paraquat (10 mg/kg) was administered i.p. to rats. Rats were sacrificed and lung, liver, and kidney were collected 2, 24 h, and 5 d after paraquat injection. Lipids were extracted and analyzed by HPLC with post-column chemiluminescence. We found that two cholesterol-derived hydroperoxides, 7alpha-hydroperoxycholest-5-en-3beta-ol (7alpha-OOH) and 7beta-hydroperoxycholest-5-en-3beta-ol (7beta-OOH) were present in lungs of control animals (0.06 and 0.06 nmol/g, respectively), in livers (6.5 and 15.8 nmol/g, respectively) and in kidneys (3.7 and 8.9 nmol/g, respectively). In liver paraquat increased lipid peroxidation approximately by 60% over the levels of control animals only at 2 h after paraquat treatment. In kidney, augmented lipid peroxidation, 7alpha-OOH and 7beta-OOH (by 70% and 147%, respectively) above levels was found at 2 h after paraquat treatment. Interestingly, these increase remained in kidney of rats 5 d after a single dose of paraquat. In contrast, cholesterol-derived hydroperoxides were not affected in lung of paraquat dosed rats. This is the first report on 7alpha-OOH and 7beta-OOH accumulations in rat liver and kidney, and it seems to reflect greater oxidative stress in the pathology of kidney of rats treated with acute paraquat at low dose." @default.
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- W2006307559 title "7-Hydroperoxycholesterol as a marker of oxidative stress in rat kidney induced by paraquat" @default.
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