The influence of intravenous infusions of glucose and amino acids on pancreatic enzyme and mucosal protein synthesis in human subjects
Journal of Parenteral and Enteral Nutrition, ISSN: 0148-6071, Vol: 22, Issue: 5, Page: 253-258
1998
- 30Citations
- 3Captures
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Metrics Details
- Citations30
- Citation Indexes30
- 30
- CrossRef25
- Captures3
- Readers3
Article Description
Background: Animal studies have shown that the synthesis and secretion of pancreatic enzymes and the turnover of mucosal proteins is strongly influenced by diet. Methods: To determine whether the absorbed products of digestion are responsible for these changes, we investigated in groups of five healthy volunteers, the effects of IV infusions of amino acids (0.08 g/kg/h) and glucose (0.3 g/kg/h) on pancreatic enzyme and mucosal protein synthesis. Proteins were labeled in vivo by a 4-hours IV infusion of C- leucine and the enteric infusion of H-leucine tracer, during simultaneous cholecystokinin stimulation and duodenal collection of secreted pancreatic enzymes. Labeling of mucosal proteins was measured by endoscopic biopsy. Results: The amino acid infusions elevated plasma amino acid levels, and the glucose infusions increased both glucose and insulin concentrations. The rates for amylase and trypsin secretion were significantly lower during the first 2 hours of glucose infusion and the rate of synthesis of trypsin was delayed by IV amino acid infusions from 52.1 ± 4.1 to 77.6 ± 8.5 minutes. Mucosal protein turnover rates were unaffected. H-labeling via the enteral route showed similar enzyme synthesis rates but variable mucosal incorporation rates. Conclusions: IV nutrients do not appear to stimulate the synthesis of pancreatic and mucosal proteins in human subjects.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0031751795&origin=inward; http://dx.doi.org/10.1177/0148607198022005253; http://www.ncbi.nlm.nih.gov/pubmed/9739026; https://aspenjournals.onlinelibrary.wiley.com/doi/10.1177/0148607198022005253; https://dx.doi.org/10.1177/0148607198022005253; https://aspenjournals.onlinelibrary.wiley.com/doi/abs/10.1177/0148607198022005253
Wiley
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