Document Detail


Targeted enhancement of oleoylethanolamide production in proximal small intestine induces across-meal satiety in rats.
MedLine Citation:
PMID:  18434444     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Pharmacological administration of the natural lipid amide, oleoylethanolamide (OEA), inhibits food intake in free-feeding rodents by prolonging latency to feed and postmeal interval. This anorexic effect is mediated by activation of type-alpha peroxisome proliferator-activated receptors (PPAR-alpha). Food intake stimulates mucosal cells in duodenum and jejunum to generate OEA, suggesting that this lipid-derived messenger may act as a local satiety hormone. As a test of this hypothesis, here, we examined whether targeted enhancement of OEA production in the small intestine affects feeding behavior in rats. We constructed an adenoviral vector (Ad-NPLD) that directs overexpression of the enzyme N-acylphosphatidylethanolamine (NAPE)-phospholipase D (PLD), which catalyzes the hydrolysis of NAPE to generate OEA. Intraduodenal injection of the Ad-NPLD vector resulted in a time-dependent increase in NAPE-PLD expression and OEA production, which was restricted to the proximal small intestine. No such effect was observed after administration of a control adenoviral vector. Enhanced OEA production in Ad-NPLD-injected animals was temporally associated with increased expression of two PPAR-alpha target genes (PPAR-alpha and CD36) and with decreased food intake. The hypophagic phenotype of Ad-NPLD-injected rats was attributable to increase feeding latency and postmeal interval, rather than decreased meal size. The results suggest that localized changes in OEA production in the small intestine, such as those produced by food intake, are sufficient to induce in rats a state of across-meal satiety similar to that elicited by systemic administration of exogenous OEA.
Authors:
Jin Fu; Janet Kim; Fariba Oveisi; Giuseppe Astarita; Daniele Piomelli
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural     Date:  2008-04-23
Journal Detail:
Title:  American journal of physiology. Regulatory, integrative and comparative physiology     Volume:  295     ISSN:  0363-6119     ISO Abbreviation:  Am. J. Physiol. Regul. Integr. Comp. Physiol.     Publication Date:  2008 Jul 
Date Detail:
Created Date:  2008-07-10     Completed Date:  2008-09-03     Revised Date:  2013-07-23    
Medline Journal Info:
Nlm Unique ID:  100901230     Medline TA:  Am J Physiol Regul Integr Comp Physiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  R45-50     Citation Subset:  IM    
Affiliation:
Department of Pharmacology and Center for Drug Discovery, University of California, Irvine, California, USA.
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MeSH Terms
Descriptor/Qualifier:
Animals
Feeding Behavior
Gene Expression Regulation
Gene Targeting
HeLa Cells
Humans
Intestine, Small / metabolism*
Male
Oleic Acids / biosynthesis*
Rats
Rats, Wistar
Satiety Response / physiology*
Grant Support
ID/Acronym/Agency:
DK073955/DK/NIDDK NIH HHS; R01 DK073955/DK/NIDDK NIH HHS
Chemical
Reg. No./Substance:
0/Oleic Acids; 0/oleoylethanolamide
Comments/Corrections

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


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