Differential Effects of Oral and Intravenous Lipid Administration on Key Molecules Related to Energy Homeostasis
2016
Context: The spectrum of lipid-induced changes in the secretion of hormones important in energy homeostasis has not yet been fully elucidated. Objective: To identify potential incretin-like effects in response to lipid administration, we examined the short-term effect of iv vs oral lipids on key molecules regulating energy homeostasis. Design, Intervention, and Participants: After a 10-hour overnight fast, 26 subjects were randomized to receive an oral lipid load, a 10% iv lipid emulsion, a 20% iv lipid emulsion, or an iv saline infusion. We obtained blood samples at 30-minute intervals for the first 2 hours and hourly thereafter for a total of 6 hours. Main Outcome Measures: Circulating levels of insulin, glucose, c-peptide, free fatty acids, incretins (glucagon-like peptide-1, gastric inhibitory polypeptide), glucagon, peptide YY, ghrelin, fibroblast growth factor 21, fetuin A, irisin, omentin, and adiponectin were measured. Results: Oral lipid ingestion resulted in higher glucagon-like peptide-1, gastr...
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