Effect of fasting on esterification of fatty acids by the small intestine in vitro

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Abstract
Fasting for periods up to and including 12-13 hr produced no significant change in esterification of myristic acid-I-C14 by the small intestine of hamsters in vitro. However, fasting for 18-19 hr, 22-24 hr, and 46-48 hr produced a significant decrease. This was partially reversed by feeding 1 hr prior to sacrifice, but was not altered by the ingestion of an inert substance. Esterification in fasted animals was significantly increased by glucose, parenterally prior to sacrifice, and when added in vitro. Intragastric administration of glycerol also increased esterification in fasted animals, although in vitro addition had no effect. An intermediate of glucose metabolism, DL-[alpha]-glycerophosphate, did not influence esterification. After a 46 to 48-hr fast no change in per cent protein in intestinal segments was noted.

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