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Record Information
Creation Date2006-05-22 14:17:35 UTC
Update Date2016-02-11 01:05:16 UTC
Secondary Accession NumbersNone
Metabolite Identification
Common NameN-Oleoylethanolamine
DescriptionN-Oleoylethanolamine (NOE or OEA) is a N-acylethanolamine. N-acylethanolamines (NAEs) constitute a class of lipid compounds naturally present in both animal and plant membranes as constituents of the membrane-bound phospholipid, N-acylphosphatidylethanolamine (NAPE). NAPE is composed of a third fatty acid moiety linked to the amino head group of the commonly occurring membrane phospholipid, phosphatidylethanolamine. NAEs are released from NAPE by phospholipase D-type hydrolases in response to a variety of stimuli. Transient NAE release and accumulation has been attributed a variety of biological activities, including neurotransmission, membrane protection, and immunomodulation in animals. N-oleoylethanolamine is an inhibitor of the sphingolipid signaling pathway, via specific ceramidase inhibition (ceramidase converts ceramide to sphingosine). N-oleoylethanolamine blocks the effects of TNF- and arachidonic acid on intracellular Ca concentration. (PMID: 12692337 , 12056855 , 12560208 , 11997249 ). N-oleoyl ethanolamine is related to the endocannabinoid anandamide. Endocannabinoids signal through cannabinoid receptors (also stimulated by the active ingredient of cannabis) but although related in structure, synthesis and degradation to anandamide, NOE cannot be considered an endocannabinoid as it does not activate the cannabinoid receptors. Most of the reported responses to NOE can be attributed to activation of peroxisome proliferator-activated receptor-alpha (PPAR-alpha). Administration of NOE inhibits body weight gain in rats. In adipocytes and hepatocytes, NOE inhibits mitogenic and metabolic signaling by the insulin receptor and produces glucose intolerance. It also inhibits gastric emptying, which might act together with the sensory neuronal signals to achieve satiety. NOE is permanently elevated in diabetic obese patients. NOE also reduces visceral and inflammatory responses through a PPAR-alpha-activation independent mechanism (PMID: 17449181 ). NOE has been shown to be an antagonist of TRVP1 (the transient receptor potential vanilloid type 1 receptor). Overall, NOE has beneficial effects on health by inducing food intake control, lipid beta-oxidation, body weight loss and analgesic effects (PMID: 18704536 ).
N-(9Z-Octadecenoyl) ethanolamineChEBI
N-(cis-9-Octadecenoyl) ethanolamineChEBI
N-Oleoyl ethanolamineChEBI
Oleamide meaChEBI
Oleoyl 1-ethanolamideChEBI
Oleoyl monoethanolamideChEBI
N-Oleoyl ethanolamine, oleoyl monoethanolamide, oleoylethanolamideHMDB
Oleic acid ethanolamideHMDB
Oleic acid monoethanolamideHMDB
Chemical FormulaC20H39NO2
Average Molecular Weight325.5292
Monoisotopic Molecular Weight325.298079497
IUPAC Name(9Z)-N-(2-hydroxyethyl)octadec-9-enamide
Traditional Nameoleoylethanolamide
CAS Registry Number111-58-0
InChI Identifier
Chemical Taxonomy
DescriptionThis compound belongs to the class of organic compounds known as n-acylethanolamines. These are compounds containing an N-acyethanolamine moiety, which is characterized by an acyl group is linked to the nitrogen atom of ethanolamine.
KingdomOrganic compounds
Super ClassOrganonitrogen compounds
Sub ClassAlkanolamines
Direct ParentN-acylethanolamines
Alternative Parents
  • N-acylethanolamine
  • Fatty acyl
  • N-acyl-amine
  • Fatty amide
  • Secondary carboxylic acid amide
  • Carboxamide group
  • Carboxylic acid derivative
  • Carboxylic acid amide
  • Hydrocarbon derivative
  • Primary alcohol
  • Organooxygen compound
  • Carbonyl group
  • Alcohol
  • Aliphatic acyclic compound
Molecular FrameworkAliphatic acyclic compounds
External Descriptors
StatusDetected and Quantified
  • Endogenous
  • Food
  • Cell signaling
  • Fuel and energy storage
  • Fuel or energy source
  • Membrane integrity/stability
  • Nutrients
  • Stabilizers
  • Surfactants and Emulsifiers
Cellular locations
  • Extracellular
  • Membrane
Physical Properties
Experimental Properties
Melting PointNot AvailableNot Available
Boiling PointNot AvailableNot Available
Water SolubilityNot AvailableNot Available
LogPNot AvailableNot Available
Predicted Properties
Water Solubility0.000244 mg/mLALOGPS
pKa (Strongest Acidic)15.47ChemAxon
pKa (Strongest Basic)-0.33ChemAxon
Physiological Charge0ChemAxon
Hydrogen Acceptor Count2ChemAxon
Hydrogen Donor Count2ChemAxon
Polar Surface Area49.33 Å2ChemAxon
Rotatable Bond Count17ChemAxon
Refractivity100.41 m3·mol-1ChemAxon
Polarizability42.77 Å3ChemAxon
Number of Rings0ChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleYesChemAxon
SpectraNot Available
Biological Properties
Cellular Locations
  • Extracellular
  • Membrane
Biofluid Locations
  • Blood
Tissue LocationNot Available
PathwaysNot Available
Normal Concentrations
BloodDetected and Quantified0.0036 +/- 0.00068 uMAdult (>18 years old)Both
BloodDetected and Quantified46.8 +/- 34 uMAdult (>18 years old)Both
Abnormal Concentrations
Not Available
Associated Disorders and Diseases
Disease ReferencesNone
Associated OMIM IDsNone
DrugBank IDNot Available
DrugBank Metabolite IDNot Available
Phenol Explorer Compound IDNot Available
Phenol Explorer Metabolite IDNot Available
FoodDB IDFDB022839
KNApSAcK IDNot Available
Chemspider ID4446574
KEGG Compound IDNot Available
BioCyc IDNot Available
BiGG IDNot Available
Wikipedia LinkNot Available
NuGOwiki LinkHMDB02088
Metagene LinkHMDB02088
METLIN IDNot Available
PubChem Compound5283454
PDB IDNot Available
ChEBI ID116103
Synthesis ReferenceNot Available
Material Safety Data Sheet (MSDS)Download (PDF)
General References
  1. Hofmann U, Domeier E, Frantz S, Laser M, Weckler B, Kuhlencordt P, Heuer S, Keweloh B, Ertl G, Bonz AW: Increased myocardial oxygen consumption by TNF-alpha is mediated by a sphingosine signaling pathway. Am J Physiol Heart Circ Physiol. 2003 Jun;284(6):H2100-5. Epub 2003 Jan 30. [12560208 ]
  2. Tripathy S, Kleppinger-Sparace K, Dixon RA, Chapman KD: N-acylethanolamine signaling in tobacco is mediated by a membrane-associated, high-affinity binding protein. Plant Physiol. 2003 Apr;131(4):1781-91. [12692337 ]
  3. Lecour S, Smith RM, Woodward B, Opie LH, Rochette L, Sack MN: Identification of a novel role for sphingolipid signaling in TNF alpha and ischemic preconditioning mediated cardioprotection. J Mol Cell Cardiol. 2002 May;34(5):509-18. [12056855 ]
  4. Amadou A, Nawrocki A, Best-Belpomme M, Pavoine C, Pecker F: Arachidonic acid mediates dual effect of TNF-alpha on Ca2+ transients and contraction of adult rat cardiomyocytes. Am J Physiol Cell Physiol. 2002 Jun;282(6):C1339-47. [11997249 ]
  5. Suardiaz M, Estivill-Torrus G, Goicoechea C, Bilbao A, Rodriguez de Fonseca F: Analgesic properties of oleoylethanolamide (OEA) in visceral and inflammatory pain. Pain. 2007 Dec 15;133(1-3):99-110. Epub 2007 Apr 20. [17449181 ]
  6. Thabuis C, Tissot-Favre D, Bezelgues JB, Martin JC, Cruz-Hernandez C, Dionisi F, Destaillats F: Biological functions and metabolism of oleoylethanolamide. Lipids. 2008 Oct;43(10):887-94. doi: 10.1007/s11745-008-3217-y. Epub 2008 Aug 13. [18704536 ]


General function:
Involved in ceramidase activity
Specific function:
Hydrolyzes the sphingolipid ceramide into sphingosine and free fatty acid at an optimal pH of 6.5-8.5. Acts as a key regulator of sphingolipid signaling metabolites by generating sphingosine at the cell surface. Acts as a repressor of apoptosis both by reducing C16-ceramide, thereby preventing ceramide-induced apoptosis, and generating sphingosine, a precursor of the antiapoptotic factor sphingosine 1-phosphate. Probably involved in the digestion of dietary sphingolipids in intestine by acting as a key enzyme for the catabolism of dietary sphingolipids and regulating the levels of bioactive sphingolipid metabolites in the intestinal tract.
Gene Name:
Uniprot ID:
Molecular weight:
  1. Hofmann U, Domeier E, Frantz S, Laser M, Weckler B, Kuhlencordt P, Heuer S, Keweloh B, Ertl G, Bonz AW: Increased myocardial oxygen consumption by TNF-alpha is mediated by a sphingosine signaling pathway. Am J Physiol Heart Circ Physiol. 2003 Jun;284(6):H2100-5. Epub 2003 Jan 30. [12560208 ]