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- W171532308 abstract "Spontaneously autoxidized products of cholesterol have been demonstrated to be angiotoxic and possibly atherogenic. This study investigates the absorption and transport of these cholesterol oxidation derivatives (COD's) as compared to cholesterol. /sup 14/C-labeled cholesterol autoxidized by incubation in a 60/sup 0/C water bath for 5 weeks, then suspended in gelatin and given to New Zealand white rabbits by gastric gavage. Rabbits were sacrificed 24 hours after treatment. COD's were separated by thin layer chromatography (TLC) and radioactivities of each COD and cholesterol were measured. Percentages of each COD and cholesterol in the original mixture before administration and in the rabbits' serum after administration are almost identical, suggesting that the rates of absorption of COD's are not significantly different from that of cholesterol. Lipoproteins were fractionated by ultracentrifugation into VLDL, LDL and HDL. Radioactivities of each COD separated by TLC in each lipoprotein fraction showed that cholestane-3..beta..,5..cap alpha..,6..beta..-triol, 7..cap alpha..- and 7..beta..-hydroxycholesterol and 7-ketocholesterol were predominantly present in VLDL (3 x serum concentration) and 25-hydroxycholesterol was predominantly in LDL (2.5 x serum concentration). HDL contained only minute amounts of COD's. The increased levels of COD's in VLDL and LDL may contribute to the atherogenicity of these lipoprotein." @default.
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- W171532308 date "1986-03-01" @default.
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- W171532308 title "Absorption and transport of cholesterol autoxidation derivatives in rabbits" @default.
- W171532308 hasPublicationYear "1986" @default.
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