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Journal of Parenteral and Enteral Nutrition
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Imbalance between Jejunum and Ileum in the Response of Brush Border Hydrolases to Oral Feeding after Intravenous Alimentation in Rats

Michel Galluser, M.S.

Unité de Biologie Cellulaire et Physiopathologie Digestives, INSERM U.61, 3, avenue Molière, 67200 Strasbourg, France

Michel Doffoel, M.D.

Unité de Biologie Cellulaire et Physiopathologie Digestives, INSERM U.61, 3, avenue Molière, 67200 Strasbourg, France

Guy Lacombe, M.D.

Unité de Biologie Cellulaire et Physiopathologie Digestives, INSERM U.61, 3, avenue Molière, 67200 Strasbourg, France

Francis Raul, PH.D.

Unité de Biologie Cellulaire et Physiopathologie Digestives, INSERM U.61, 3, avenue Molière, 67200 Strasbourg, France

The effect of oral refeeding after total parenteral nutrition (TPN) on brush border hydrolases was measured in the proximal jejunum and ileum of adult rats. The animals received intravenously for 4 days a mixture of Intralipid 10% and Vamine-Glucose. At the end of TPN, oral feeding was reinstituted and the rats were fed with an isocaloric standard diet (60% carbohydrate, 17% protein, 3% lipid). Sucrase, isomaltase, lactase, and aminopeptidase N activities were measured at the end of TPN and at 1, 3, and 5 days after TPN. Sham-operated rats nourished orally with the standard diet were used as controls. In both intestinal segments, lactase activity showed no significant changes at the end of TPN or during oral realimentation. Isomaltase, and especially sucrase activities, exhibited an important drop at the end of TPN. After TPN, a complete restoration of isomaltase and sucrase activities was obtained in the jejunum only. During oral refeeding a 40% deficit in sucrase activity persisted in the ileum throughout the experimental period, whereas normal isomaltase activity was restored in this segment. Aminopeptidase N activity was lowered by TPN and recovered normal values within a few hours after oral realimentation. Thus, reinstitution of oral feeding after TPN should take into account that the intestine is capable of digesting normal amounts of dietary protein but has a reduced tolerance for carbohydrates. (Journal of Parenteral and Enteral Nutrition 13:37-40, 1989)

Journal of Parenteral and Enteral Nutrition, Vol. 13, No. 1, 37-40 (1989)
DOI: 10.1177/014860718901300137
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