Enteral Arginine Partially Ameliorates Parenteral Nutrition–Induced Small Intestinal Atrophy and Stimulates Hepatic Protein Synthesis in Neonatal Piglets
| Autor: | O Chandani Dinesh, Janet A. Brunton, Robert F. Bertolo, Mark P. Baldwin, M. Elaine Dodge |
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| Rok vydání: | 2013 |
| Předmět: |
Male
Parenteral Nutrition medicine.medical_specialty Arginine Swine Medicine (miscellaneous) Biology Enteral administration Enteral Nutrition Mesenteric Artery Superior Valine Internal medicine Intestine Small medicine Animals Intestinal Mucosa Tyrosine chemistry.chemical_classification Nutrition and Dietetics Organ Size Small intestine Diet Amino acid Endocrinology medicine.anatomical_structure Parenteral nutrition Animals Newborn Liver chemistry Regional Blood Flow Protein Biosynthesis Parenteral Nutrition Total Amino Acids Essential Atrophy Isoleucine |
| Zdroj: | Journal of Parenteral and Enteral Nutrition. 38:973-981 |
| ISSN: | 1941-2444 0148-6071 |
| Popis: | BACKGROUND Arginine is an indispensable amino acid in neonates; de novo synthesis of arginine occurs in the small intestine (SI) but is reduced during parenteral nutrition (PN), limiting the arginine available to the mucosa. We assessed the effects of route of intake and dietary concentration of arginine on protein synthesis, superior mesenteric artery (SMA) blood flow, and SI morphology. METHODS Piglets (n = 18, 14-17 days old) were given complete PN for 3 days to induce SI atrophy, then switched to 1 of 3 treatments: arginine-free PN plus an intragastric (IG) infusion of high arginine (1.6 g · kg(-1)· d(-1), IG-H Arg) or low arginine (0.6 g · kg(-1)· d(-1), IG-L Arg) or complete high-arginine PN (1.6 g · kg(-1)· d(-1), IV-H Arg). RESULTS Enteral arginine, irrespective of amount provided, stimulated hepatic protein synthesis compared with intravenous delivery of arginine (P = .01). SMA blood flow declined for all groups following the initiation of PN. After 48 hours on the test diets, all groups reached low constant levels, but the IV-H group was significantly higher than both IG groups (P < .05). Despite greater blood flow, the SI morphological characteristics in IV-H Arg pigs were not significantly improved over the other groups. IV-H Arg pigs had higher plasma concentrations of indispensable amino acids (tyrosine, isoleucine, and valine) compared with IG-H Arg, despite identical amino acid intakes. CONCLUSIONS Intravenous delivery of arginine sustained the best SMA blood flow, whereas even a moderate amount of enteral arginine stimulated liver protein synthesis and maintained SI growth, independent of blood flow. |
| Databáze: | OpenAIRE |
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