Postprandial changes in serum unconjugated bile acid concentrations in healthy Beagles

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Abstract

Objective-To investigate postprandial changes in serum concentrations of unconjugated bile acids in healthy Beagles. Animals-7 healthy Beagles. Procedure-Blood samples were obtained from dogs at regular intervals up to 8 hours after consumption of a meal. Serum concentrations of 5 unconjugated bile acids were determined at each time point, using gas chromatography-mass spectrometry with selected ion monitoring. Results-Total serum unconjugated bile acid concentration was significantly increased, relative to baseline values, at 360, 420, and 480 minutes after feeding. Unconjugated cholic acid was significantly increased at 360, 420, and 480 minutes. The proportion of total unconjugated bile acids represented by cholic acid was significantly increased at 240 to 480 minutes. Deoxycholic acid was significantly increased at 360 and 420 minutes. Chenodeoxycholic acid was significantly increased at 360 to 480 minutes. Lithocholic acid was significantly increased at 180 minutes, whereas no significantly changes in ursodeoxycholic acid were detected at any time point. Conclusions and Clinical Relevance-Healthy Beagles had significant increases in serum concentrations and changes in the profile of unconjugated bile acids after a meal. These increases persisted > 8 hours, indicating that prolonged withholding of food is necessary to avoid the risk of a false-positive diagnosis when assessing serum unconjugated bile acid concentrations in dogs.

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Ruaux, C. G., Steiner, J. M., & Williams, D. A. (2002). Postprandial changes in serum unconjugated bile acid concentrations in healthy Beagles. American Journal of Veterinary Research, 63(6), 789–793. https://doi.org/10.2460/ajvr.2002.63.789

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