Abstract
The effect of corn oil (approximately 60% [wt/vol] linoleic acid) dietary supplementation on various components of equine gastric secretion was studied by use of a repeated‐measures experimental design. Four healthy adult ponies were surgically fitted with gastric cannulas. The ponies were then fed a free‐choice hay diet for 5 weeks, which was followed by 5 weeks of the same diet supplemented with 45 mL of corn oil daily. Gastric contents were analyzed under basal and pentagastrin‐stimulated conditions once weekly during the latter 2 weeks on each diet. Gastric contents were collected at 30‐minute intervals, and volume, hydrogen ion concentration, sodium content, and prostaglandin E2(PGE2) content were measured. Data were analyzed by a linear fixed‐effect modeling procedure. During the diet supplemented with corn oil, the ponies had, under basal and pentagastrin‐stimulated conditions, significantly decreased acid output and significantly increased PGE2and sodium outputs compared to those measured before corn oil supplementation. We conclude that corn oil supplementation may be an effective and inexpensive way to increase the protective properties of equine glandular gastric mucosa. This could be particularly helpful in reducing the chances of ulceration associated with nonsteroidal anti‐inflammatory drug (NSAID) administration.
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