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- W1576491180 abstract "Dietary fish oils are implicated in reducing the incidence of coronary heart disease, perhaps by altering the properties of plasma lipoproteins. The hypothesis that omega-3 polyunsaturated fatty acids (PUFA) in fish oils produce changes in lipid ordering and dynamics within high density lipoprotein (HDL), thereby potentially modifying cholesterol transport, is investigated here. Rabbits were fed a diet supplemented with either 10% (by weight) menhaden oil (MO), a fish oil rich in omega-3 PUFAs, or hydrogenated cottonseed oil for a period of 12 weeks. HDL was isolated by sequential flotation ultracentrifugation from plasma drawn every 2 weeks. Gas chromatography confirmed that the predominant omega-3 PUFAs of fish oils, eicosapentaenoic 20:5 and docosahexaenoic 22:6 acids, were only incorporated into the triglyceride, phospholipid, and cholesteryl ester constituents of lipoproteins from rabbits on the MO diet. ESR of 5- and 16-doxyl stearic acids demonstrates that molecular order and dynamics within the outer monolayer of HDL is virtually unaffected. In contrast, ESR of cholesteryl 12-doxyl stearate indicates order is less within the inner apolar core of the lipoprotein for the MO diet than for the hydrogenated cottonseed oil diet. Fluorescence polarization of 1,6-diphenyl-1,3,5-hexatriene supports this finding. The greater disorder detected within HDL from rabbits fed fish oil may result in an enhancement of cholesterol exchange between lipoproteins and between lipoproteins and cells, which may have anti-atherogenic ramifications." @default.
- W1576491180 created "2016-06-24" @default.
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- W1576491180 date "1992-04-01" @default.
- W1576491180 modified "2023-10-02" @default.
- W1576491180 title "Effects of dietary fish oil on plasma high density lipoprotein. Electron spin resonance and fluorescence polarization studies of lipid ordering and dynamics." @default.
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- W1576491180 doi "https://doi.org/10.1016/s0021-9258(18)42422-2" @default.
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