title: Circulating endocannabinoids in insulin sensitive vs. insulin resistant obese postmenopausal women. A MONET group study.
abstract: OBJECTIVE
  To measure the circulating levels of endocannabinoids and related molecules at fasting, after acute hyperinsulinemia and after weight loss in insulin sensitive vs. insulin resistant obese postmenopausal women.
  
  
  METHODS
  The sample consisted of 30 obese postmenopausal women (age: 58.9 ± 5.2 yrs; BMI: 32.9 ± 3.6 kg/m(2) ). Subjects underwent a 3-hour hyperinsulinaemic-euglycaemic clamp (HEC) (glucose disposal rate (M-value): 10.7 ± 3.3 mg min(-1) kg(-1) FFM) and 6-month weight loss intervention. Participants were classified as insulin sensitive obese (ISO) or insulin resistant obese (IRO) based on a predefined cutoff. Plasma levels of the endocannabinoids, anandamide (AEA), 2-arachidonoylglycerol (2-AG), and of the AEA-related compounds, palmitoylethanolamide (PEA) and oleoylethanolamide (OEA), were measured by liquid chromatography-mass spectrometry.
  
  
  RESULTS
  IRO presented higher levels of 2-AG (P < 0.05) independently of the HEC and weight loss, whereas the HEC had an independent inhibitory effect on AEA, PEA, and OEA levels (P < 0.05) in both groups. Furthermore, there was an independent stimulatory effect of weight loss only on PEA levels in both groups (P < 0.05).
  
  
  CONCLUSIONS
  This study is the first to show that higher circulating levels of the endocannabinoid 2-AG are found in IRO compared to ISO postmenopausal women, and that weight loss is associated with an increase in PEA, a PPAR-α ligand.
authors.affiliation: School of Human Kinetics Faculty of Health Science, University of Ottawa, Ottawa, ON, Canada; Behavioural and Metabolic Research Unit, University of Ottawa, Ottawa, Ontario, Canada.
authors.forename: Joseph
authors.initials: J
authors.lastname: Abdulnour
authors.forename: Siham
authors.initials: S
authors.lastname: Yasari
authors.forename: Rémi
authors.initials: R
authors.lastname: Rabasa-Lhoret
authors.forename: May
authors.initials: M
authors.lastname: Faraj
authors.forename: Stefania
authors.initials: S
authors.lastname: Petrosino
authors.forename: Fabiana
authors.initials: F
authors.lastname: Piscitelli
authors.forename: Denis
authors.initials: D
authors.lastname: Prud' Homme
authors.forename: Vincenzo
authors.initials: V
authors.lastname: Di Marzo
mesh_terms: D000577:Amides; D001095:Arachidonic Acids / Q000097:blood; D001823:Body Composition; D015992:Body Mass Index; D008076:Cholesterol, HDL / Q000097:blood; D008078:Cholesterol, LDL / Q000097:blood; D015331:Cohort Studies; D063388:Endocannabinoids / Q000097:blood*; D004983:Ethanolamines / Q000097:blood; D005260:Female; D015309:Glucose Clamp Technique; D005989:Glycerides / Q000097:blood; D006801:Humans; D006946:Hyperinsulinism; D007328:Insulin / Q000097:blood*; D007333:Insulin Resistance; D008875:Middle Aged; D009765:Obesity / Q000097:blood*; D009829:Oleic Acids / Q000097:blood; D010169:Palmitic Acids / Q000097:blood; D053284:Polyunsaturated Alkamides / Q000097:blood; D017698:Postmenopause; D014280:Triglycerides / Q000097:blood; D015431:Weight Loss
chemical_list: D000577:Amides; D001095:Arachidonic Acids; D008076:Cholesterol, HDL; D008078:Cholesterol, LDL; D063388:Endocannabinoids; D004983:Ethanolamines; D005989:Glycerides; D007328:Insulin; D009829:Oleic Acids; D010169:Palmitic Acids; D053284:Polyunsaturated Alkamides; D014280:Triglycerides; C488250:oleoylethanolamide; C005958:palmidrol; C094503:glyceryl 2-arachidonate; C078814:anandamide