Document Detail

Load-dependent effects of duodenal lipid on antropyloroduodenal motility, plasma CCK and PYY, and energy intake in healthy men.
MedLine Citation:
PMID:  17942490     Owner:  NLM     Status:  MEDLINE    
Both load and duration of small intestinal lipid infusion affect antropyloroduodenal motility and CCK and peptide YY (PYY) release at loads comparable to and higher than the normal gastric emptying rate. We determined 1) the effects of intraduodenal lipid loads well below the mean rate of gastric emptying on, and 2) the relationships between antropyloroduodenal motility, CCK, PYY, appetite, and energy intake. Sixteen healthy males were studied on four occasions in double-blind, randomized fashion. Antropyloroduodenal motility, plasma CCK and PYY, and appetite perceptions were measured during 50-min IL (Intralipid) infusions at: 0.25 (IL0.25), 1.5 (IL1.5), and 4 (IL4) kcal/min or saline (control), after which energy intake at a buffet meal was quantified. IL0.25 stimulated isolated pyloric pressure waves (PWs) and CCK release, albeit transiently, and suppressed antral PWs, PW sequences, and hunger (P < 0.05) but had no effect on basal pyloric pressure or PYY when compared with control. Loads >/= 1.5 kcal/min were required for the stimulation of basal pyloric pressures and PYY and suppression of duodenal PWs (P < 0.05). All of these effects were related to the lipid load (R > 0.5 or < -0.5, P < 0.05). Only IL4 reduced energy intake (in kcal: control, 1,289 +/- 62; IL0.25, 1,282 +/- 44; IL1.5, 1,235 +/- 71; and IL4, 1,139 +/- 65 compared with control and IL0.25, P < 0.05). In conclusion, in healthy males the effects of intraduodenal lipid on antropyloroduodenal motility, plasma CCK and PYY, appetite, and energy intake are load dependent, and the threshold loads required to elicit responses vary for these parameters.
Amelia N Pilichiewicz; Penny Papadopoulos; Ixchel M Brennan; Tanya J Little; James H Meyer; Judith M Wishart; Michael Horowitz; Christine Feinle-Bisset
Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't     Date:  2007-10-17
Journal Detail:
Title:  American journal of physiology. Regulatory, integrative and comparative physiology     Volume:  293     ISSN:  0363-6119     ISO Abbreviation:  Am. J. Physiol. Regul. Integr. Comp. Physiol.     Publication Date:  2007 Dec 
Date Detail:
Created Date:  2007-12-06     Completed Date:  2008-02-15     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100901230     Medline TA:  Am J Physiol Regul Integr Comp Physiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  R2170-8     Citation Subset:  IM    
Discipline of Medicine, Royal Adelaide Hospital, Adelaide SA 5000, Australia.
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MeSH Terms
Cholecystokinin / blood*
Duodenum / physiology*
Energy Intake / physiology*
Gastrointestinal Motility / physiology*
Lipid Metabolism / physiology*
Peptide YY / blood*
Pyloric Antrum / physiology*
Reference Values
Reg. No./Substance:
106388-42-5/Peptide YY; 9011-97-6/Cholecystokinin

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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