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- W2275918823 abstract "This study was undertaken to determine the mode of transport of the essential (n-3) fatty acids docosahexaenoic acid 22:6(n-3) and linolenic acid 18:3(n-3). Male weanling Sprague-Dawley rats received a mixture of corn oil and [14C]18:3(n-3) or [14C]22:6(n-3) by gavage. At periods of 1 to 4 days after the injection, four rats per time point were killed and samples of blood were taken via heart puncture and the livers and retinas were collected. Blood lipoproteins and plasma proteins were separated by ultracentrifugation and analyzed by HPLC. Lipids were extracted and saponified and the fatty acids were converted to phenacyl esters for separation of individual fatty acids. After 1 and 2 h, radioactivity from 18:3(n-3) and 22:6(n-3) was observed primarily in the chylomicron/very low density lipoprotein fraction. By 4 h, radioactivity in the lipoprotein fraction was greatly decreased, with a small amount of radioactivity associated with albumin in the soluble protein fraction. After 24 h, the total amount of radioactivity associated with lipoprotein was further reduced, with more than half of the remaining label occurring in association with albumin and another unidentified protein. In the liver, 22:6(n-3) was concentrated in triacylglycerols (40.7%) and phospholipids (51.1%), with a maximum specific activity at 4 h. In the rod outer segments (ROS), the specific activity of [14C]22:6(n-3) increased to a maximum at 24 h and maintained a high level even at 4 days. These data suggest that after injection, 18:3(n-3) and 22:6(n-3) are esterified to triglyceride and phospholipid by the intestinal absorptive cells and transported in chylomicrons to the liver. After conversion of 18:3(n-3) to 22:6(n-3) in the liver, the retina accumulates 22:6(n-3) which may be transported from the liver via albumin and another unidentified protein, and is retained by the rod outer segments." @default.
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- W2275918823 date "1992-04-01" @default.
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- W2275918823 title "Transport of n-3 fatty acids from the intestine to the retina in rats." @default.
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- W2275918823 doi "https://doi.org/10.1016/s0022-2275(20)41619-0" @default.
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