Journal of Molecular Medicine

, Volume 86, Issue 4, pp 413–422

Inhibitory effect of the anorexic compound oleoylethanolamide on gastric emptying in control and overweight mice

  • Gabriella Aviello
  • Isabel Matias
  • Raffaele Capasso
  • Stefania Petrosino
  • Francesca Borrelli
  • Pierangelo Orlando
  • Barbara Romano
  • Francesco Capasso
  • Vincenzo Di Marzo
  • Angelo A. Izzo
Original Article

DOI: 10.1007/s00109-008-0305-7

Cite this article as:
Aviello, G., Matias, I., Capasso, R. et al. J Mol Med (2008) 86: 413. doi:10.1007/s00109-008-0305-7

Abstract

Gastric emptying regulates food intake. Oleoylethanolamide (OEA), an endogenous acylethanolamide chemically related to the endocannabinoid anandamide, inhibits food intake, but its effect on gastric emptying is unknown. Here, we investigated the effect and the role of OEA on gastric emptying in mice fed either a standard (STD) or a high-fat diet (HFD) for 14 weeks. Gastric emptying was reduced by OEA, but not by its saturated analog, palmitoylethanolamide. The effect of OEA was unaffected by rimonabant (cannabinoid CB1 receptor antagonist), SR144528 (cannabinoid CB2 receptor antagonist), 5′-iodoresiniferatoxin (transient receptor potential vanilloid type 1 antagonist), or MK886 (peroxisome proliferator-activated receptor-α) antagonist. Compared to STD mice, HFD mice showed delayed gastric emptying and higher levels of gastric OEA. HFD-induced increase in OEA levels was accompanied by increased expression of the OEA-synthesizing enzyme N-acyl-phosphatidylethanolamine-selective phospholipase D and decreased expression of the OEA-degrading enzyme fatty acid amide hydrolase. These results might suggest that elevation of gastric OEA could possibly contribute to the delayed gastric emptying observed in HFD-fed animals. HFD regulates OEA levels in the stomach through an increase of its biosynthesis and a decrease of its enzymatic degradation. The inhibitory effect of OEA on gastric emptying here observed might underlie part of the anorexic effects of this compound previously reported.

Keywords

Cannabinoid receptorsEndocannabinoidsGastric motilityObesityOleoylethanolamideFatty acid amide hydrolase (FAAH)

Abbreviations

AA-5-HT

N-arachidonoylserotonin

2-AG

2-arachidonoylglycerol

DMSO

Dimethylsulfoxide

FAAH

Fatty acid amide hydrolase

HFD

High-fat diet

OEA

Oleoylethanolamide

I-RTX

5′-iodoresiniferatoxin

NAPE-PLD

N-acyl-phosphatidylethanolamine-selective phospholipase D

PEA

Palmitoylethanolamide

PPAR

Peroxisome proliferator-activated receptor

RT-PCR

Reverse-transcription polymerase chain reaction

TRPV1

Transient receptor potential vanilloid type-1

STD

Standard diet

Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  • Gabriella Aviello
    • 1
  • Isabel Matias
    • 2
  • Raffaele Capasso
    • 1
  • Stefania Petrosino
    • 2
    • 3
  • Francesca Borrelli
    • 1
  • Pierangelo Orlando
    • 4
  • Barbara Romano
    • 1
  • Francesco Capasso
    • 1
  • Vincenzo Di Marzo
    • 2
  • Angelo A. Izzo
    • 1
  1. 1.Endocannabinoid Research Group, Department of Experimental PharmacologyUniversity of Naples Federico IINaplesItaly
  2. 2.Endocannabinoid Research Group, Institute of Biomolecular ChemistryNational Research CouncilPozzuoliItaly
  3. 3.Endocannabinoid Research Group, Department of Pharmaceutical SciencesUniversity of SalernoFiscianoItaly
  4. 4.Endocannabinoid Research Group, Institute of Protein BiochemistryNational Research CouncilNaplesItaly