Fed Proc. 1985 Apr;44(7):2365-8.

Fatty acid metabolism and ketone formation in the suckling rat.

Abstract

Rat milk triacylglycerols contain 35% medium-chain length fatty acids. About 70% of ingested medium-chain fatty acids are released from milk triacylglycerols in the stomach and small intestine and are absorbed directly into the portal venous system. Based on studies with the perfused suckling rat liver and in vivo studies with 2-tetradecylglycidic acid, an inhibitor of long-chain fatty acid oxidation, it is estimated that medium-chain fatty acids provide 75-80% of the substrate for ketogenesis. The preferential use of medium-chain fatty acids for ketogenesis spares long-chain fatty acids for complex lipid and membrane biosynthesis during this period of rapid growth. Although medium-chain fatty acids are the major substrate for ketogenesis, this pathway accounts for only 15% of the utilization of ingested medium-chain fatty acids, the rest presumably being oxidized directly in extrahepatic tissues.

PMID:: 3884393; [PubMed - indexed for MEDLINE]

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