Document Detail

Effects of intraduodenal fatty acids on appetite, antropyloroduodenal motility, and plasma CCK and GLP-1 in humans vary with their chain length.
MedLine Citation:
PMID:  15166004     Owner:  NLM     Status:  MEDLINE    
The gastrointestinal effects of intraluminal fats may be critically dependent on the chain length of fatty acids released during lipolysis. We postulated that intraduodenal administration of lauric acid (12 carbon atoms; C12) would suppress appetite, modulate antropyloroduodenal pressure waves (PWs), and stimulate the release of cholecystokinin (CCK) and glucagon-like peptide-1 (GLP-1) more than an identical dose of decanoic acid (10 carbon atoms; C10). Eight healthy males (19-47 yr old) were studied on three occasions in a double-blind, randomized fashion. Appetite perceptions, antropyloroduodenal PWs, and plasma CCK and GLP-1 concentrations were measured during a 90-min intraduodenal infusion of 1) C12, 2) C10, or 3) control (rate: 2 ml/min, 0.375 kcal/min for C12/C10). Energy intake at a buffet meal, immediately after completion of the infusion, was also quantified. C12, but not C10, suppressed appetite perceptions (P < 0.001) and energy intake (control: 4,604 +/- 464 kJ, C10: 4,109 +/- 588 kJ, and C12: 1,747 +/- 632 kJ; P < 0.001, C12 vs. control/C10). C12, but not C10, also induced nausea (P < 0.001). C12 stimulated basal pyloric pressures and isolated pyloric PWs and suppressed antral and duodenal PWs compared with control (P < 0.05 for all). C10 transiently stimulated isolated pyloric PWs (P = 0.001) and had no effect on antral PWs but markedly stimulated duodenal PWs (P = 0.004). C12 and C10 increased plasma CCK (P < 0.001), but the effect of C12 was substantially greater (P = 0.001); C12 stimulated GLP-1 (P < 0.05), whereas C10 did not. In conclusion, there are major differences in the effects of intraduodenal C12 and C10, administered at 0.375 kcal/min, on appetite, energy intake, antropyloroduodenal PWs, and gut hormone release in humans.
Kate L Feltrin; Tanya J Little; James H Meyer; Michael Horowitz; Andre J P M Smout; Judith Wishart; Amelia N Pilichiewicz; Thomas Rades; Ian M Chapman; Christine Feinle-Bisset
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Publication Detail:
Type:  Clinical Trial; Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't     Date:  2004-05-27
Journal Detail:
Title:  American journal of physiology. Regulatory, integrative and comparative physiology     Volume:  287     ISSN:  0363-6119     ISO Abbreviation:  Am. J. Physiol. Regul. Integr. Comp. Physiol.     Publication Date:  2004 Sep 
Date Detail:
Created Date:  2004-08-13     Completed Date:  2004-09-10     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  100901230     Medline TA:  Am J Physiol Regul Integr Comp Physiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  R524-33     Citation Subset:  IM    
NHMRC Senior Research Fellow, Department of Medicine, Royal Adelaide Hospital, North Terrace, Adelaide, South Australia 5000, Australia.
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MeSH Terms
Appetite / drug effects*
Cholecystokinin / blood*
Decanoic Acids / administration & dosage,  chemistry
Double-Blind Method
Duodenum / drug effects,  physiology*
Energy Intake / drug effects
Fatty Acids / administration & dosage*
Gastrointestinal Motility / drug effects*
Glucagon / blood*
Glucagon-Like Peptide 1
Hormones / blood
Infusions, Parenteral
Lauric Acids / administration & dosage,  chemistry
Middle Aged
Peptide Fragments / blood*
Pilot Projects
Protein Precursors / blood*
Pyloric Antrum / drug effects,  physiology*
Pylorus / physiology
Sensation / drug effects
Reg. No./Substance:
0/Decanoic Acids; 0/Fatty Acids; 0/Hormones; 0/Lauric Acids; 0/Peptide Fragments; 0/Protein Precursors; 143-07-7/lauric acid; 334-48-5/decanoic acid; 89750-14-1/Glucagon-Like Peptide 1; 9007-92-5/Glucagon; 9011-97-6/Cholecystokinin
Comment In:
Am J Physiol Regul Integr Comp Physiol. 2004 Sep;287(3):R517-8   [PMID:  15308500 ]

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