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Dietary Inulin Affects the Morphology but not the Sodium-Dependent Glucose and Glutamine Transport in the Jejunum of Broilers

H. Rehman^*, C. Rosenkranz^,1, J. Böhm^* and J. Zentek^*,2

^* Institute of Nutrition, Department of Veterinary Public Health and Food Science, and Institute of Histology and Embryology, Department of Pathology, University of Veterinary Medicine, Veterinärplatz 1, A-1210 Vienna, Austria

² Corresponding author: zentek.juergen{at}vetmed.fu-berlin.de

Inulin, a prebiotic, is a fermentable oligosaccharide that may affect the intestinal mucosal architecture and the electrophysiological parameters. The effects of a diet with added inulin were tested on the jejunal morphology and electrogenic transport of Glc and Gln from the jejunal mucosa in broilers. Short-circuit current and transmucosal tissue resistance of jejunal flaps were measured in Ussing chambers. The feeding experiment was carried out in broilers (n = 40) using 1% inulin with an application period of 5 wk. The inulin-containing diet resulted in longer jejunal villi (P < 0.05) and deeper crypts (P < 0.01) than in control birds without affecting villus:crypt depth. Basal short-circuit current value remained unaffected by dietary treatment. Inulin supplementation did not modify the electrogenic transport of Glc and Gln in the jejunal mucosa. The basal value of transmucosal tissue resistance was significantly lower (P < 0.001) in the inulin-fed group compared with the control group. In conclusion, inulin supplementation affected the jejunal mucosal architecture but did not modify the electrogenic transport of Glc and amino acid under present experimental condition.

Key Words: inulin • electrophysiology • jejunum • short-circuit current • transmucosal tissue resistance

¹ Current address: Institute of Nutrition, Faculty of Veterinary Medicine, Free University, D 14195 Berlin, Germany.

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