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Short-chain fatty acid-supplemented total parenteral nutrition alters intestinal structure, glucose transporter 2 (GLUT2) mRNA and protein, and proglucagon mRNA abundance in normal rats.
Am J Clin Nutr 1998; 68(1):118-25AJ

Abstract

Intestinal adaptation is a complex physiologic process that is not completely understood. Intravenous short-chain fatty acids (SCFAs) enhance intestinal adaptation after 80% enterectomy in rats. The purpose of this study was to examine rapid responses to SCFA-supplemented total parenteral nutrition (TPN) in the normal small intestine. After jugular catheterization, 31 Sprague-Dawley rats (weighing 258 +/- 3 g) were randomly assigned to receive standard TPN or an isoenergetic, isonitrogenous TPN solution supplemented with SCFAs (TPN+SCFA). Intestinal samples were obtained after 24 or 72 h of nutrient infusion. TPN+SCFA for 24 h increased (P < 0.05) the ileal RNA concentration (microg RNA/mg ileum) whereas TPN+SCFA for 72 h increased (P < 0.05) the ileal DNA concentration (microg DNA/mg ileum) and decreased (P < 0.05) the ileal protein concentration (microg protein/mg ileum). Ileal proglucagon mRNA abundance was elevated (P < 0.05) after 24 h of TPN+SCFA infusion and returned to levels seen with control TPN by 72 h. Glucose transporter 2 (GLUT2) mRNA was significantly higher (P < 0.05) in the TPN+SCFA groups at both time points when compared with control TPN groups. Ileal GLUT2 protein abundance in the 72-h TPN+SCFA group was significantly higher (P < 0.05) than that of all other groups. Sodium-glucose cotransporter (SGLT-1) mRNA and protein abundance and uptake of D-fructose and D-glucose did not differ between groups. Jejunal uptake of L-glucose and lauric acid was significantly higher (P < 0.05) after 72 h of TPN+SCFA than after 24 h, whereas the 24- and 72-h TPN groups did not differ. In summary, SCFAs led to rapid changes in ileal proglucagon and glucose transporter expression in rats receiving TPN and provide insights into therapeutic management of individuals with short bowel syndrome or intestinal malabsorption syndromes.

Authors+Show Affiliations

Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, Canada.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

9665105

Citation

Tappenden, K A., et al. "Short-chain Fatty Acid-supplemented Total Parenteral Nutrition Alters Intestinal Structure, Glucose Transporter 2 (GLUT2) mRNA and Protein, and Proglucagon mRNA Abundance in Normal Rats." The American Journal of Clinical Nutrition, vol. 68, no. 1, 1998, pp. 118-25.
Tappenden KA, Drozdowski LA, Thomson AB, et al. Short-chain fatty acid-supplemented total parenteral nutrition alters intestinal structure, glucose transporter 2 (GLUT2) mRNA and protein, and proglucagon mRNA abundance in normal rats. Am J Clin Nutr. 1998;68(1):118-25.
Tappenden, K. A., Drozdowski, L. A., Thomson, A. B., & McBurney, M. I. (1998). Short-chain fatty acid-supplemented total parenteral nutrition alters intestinal structure, glucose transporter 2 (GLUT2) mRNA and protein, and proglucagon mRNA abundance in normal rats. The American Journal of Clinical Nutrition, 68(1), pp. 118-25.
Tappenden KA, et al. Short-chain Fatty Acid-supplemented Total Parenteral Nutrition Alters Intestinal Structure, Glucose Transporter 2 (GLUT2) mRNA and Protein, and Proglucagon mRNA Abundance in Normal Rats. Am J Clin Nutr. 1998;68(1):118-25. PubMed PMID: 9665105.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Short-chain fatty acid-supplemented total parenteral nutrition alters intestinal structure, glucose transporter 2 (GLUT2) mRNA and protein, and proglucagon mRNA abundance in normal rats. AU - Tappenden,K A, AU - Drozdowski,L A, AU - Thomson,A B, AU - McBurney,M I, PY - 1998/7/17/pubmed PY - 1998/7/17/medline PY - 1998/7/17/entrez SP - 118 EP - 25 JF - The American journal of clinical nutrition JO - Am. J. Clin. Nutr. VL - 68 IS - 1 N2 - Intestinal adaptation is a complex physiologic process that is not completely understood. Intravenous short-chain fatty acids (SCFAs) enhance intestinal adaptation after 80% enterectomy in rats. The purpose of this study was to examine rapid responses to SCFA-supplemented total parenteral nutrition (TPN) in the normal small intestine. After jugular catheterization, 31 Sprague-Dawley rats (weighing 258 +/- 3 g) were randomly assigned to receive standard TPN or an isoenergetic, isonitrogenous TPN solution supplemented with SCFAs (TPN+SCFA). Intestinal samples were obtained after 24 or 72 h of nutrient infusion. TPN+SCFA for 24 h increased (P < 0.05) the ileal RNA concentration (microg RNA/mg ileum) whereas TPN+SCFA for 72 h increased (P < 0.05) the ileal DNA concentration (microg DNA/mg ileum) and decreased (P < 0.05) the ileal protein concentration (microg protein/mg ileum). Ileal proglucagon mRNA abundance was elevated (P < 0.05) after 24 h of TPN+SCFA infusion and returned to levels seen with control TPN by 72 h. Glucose transporter 2 (GLUT2) mRNA was significantly higher (P < 0.05) in the TPN+SCFA groups at both time points when compared with control TPN groups. Ileal GLUT2 protein abundance in the 72-h TPN+SCFA group was significantly higher (P < 0.05) than that of all other groups. Sodium-glucose cotransporter (SGLT-1) mRNA and protein abundance and uptake of D-fructose and D-glucose did not differ between groups. Jejunal uptake of L-glucose and lauric acid was significantly higher (P < 0.05) after 72 h of TPN+SCFA than after 24 h, whereas the 24- and 72-h TPN groups did not differ. In summary, SCFAs led to rapid changes in ileal proglucagon and glucose transporter expression in rats receiving TPN and provide insights into therapeutic management of individuals with short bowel syndrome or intestinal malabsorption syndromes. SN - 0002-9165 UR - https://www.unboundmedicine.com/medline/citation/9665105/Short_chain_fatty_acid_supplemented_total_parenteral_nutrition_alters_intestinal_structure_glucose_transporter_2__GLUT2__mRNA_and_protein_and_proglucagon_mRNA_abundance_in_normal_rats_ L2 - https://academic.oup.com/ajcn/article-lookup/doi/10.1093/ajcn/68.1.118 DB - PRIME DP - Unbound Medicine ER -