Oea Signaling Pathways and the Metabolic Benefits of Vertical Sleeve Gastrectomy.
Annals of Surgery. 2018-11-01; : 1
DOI: 10.1097/sla.0000000000003093
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Hutch CR(1), Trakimas DR(2), Roelofs K(1), Pressler J(3), Sorrell J(3), Cota D(4)(5), Obici S(6), Sandoval DA(1).
Author information:
(1)University of Michigan, Ann Arbor, MI.
(2)University of Massachusetts Medical School, Worcester, MA.
(3)University of Cincinnati, Cincinnati, OH.
(4)INSERM, Neurocentre Magendie, Physiophatologie de la Plasticité Neuronale, Bordeaux, France.
(5)University of Bordeaux, Neurocentre Magendie, Physiopathologie de la Plasticité Neuronale, Bordeaux, France.
(6)SUNY, Stony Brook, NY.
OBJECTIVE: The aim of this study was to determine whether downstream (peroxisome
proliferator-activated-receptor alpha (PPARα) and the G-protein coupled receptor,
GPR119) and upstream (a fatty acid translocase, CD36) signaling targets of
N-oleoylethanolamide (OEA) were necessary for weight loss, metabolic
improvements, and diet preference following vertical sleeve gastrectomy (VSG).
SUMMARY BACKGROUND DATA: OEA is an anorectic N-acylethanolamine produced from
dietary fats within the intestinal lumen that can modulate lipid metabolism,
insulin secretion, and energy expenditure by activating targets such as PPARα and
GPR119.
METHODS: Diet-induced obese mice, including wild-type or whole body knockout (KO)
of PPARα, GPR119, and CD36, were stratified to either VSG or sham surgery before
body weight, body composition, diet preference, and glucose and lipid metabolic
endpoints were assessed.
RESULTS: We found increased duodenal production of OEA and expression of both
GPR119 and CD36 were upregulated in wild-type mice after VSG. However, weight
loss and glucose tolerance were improved in response to VSG in PPARαKO, GPR119KO,
and CD36KO mice. In fact, VSG corrected hepatic triglyceride dysregulation in
CD36KO mice, and circulating triglyceride and cholesterol levels in PPARαKO mice.
Lastly, we found PPARα-mediated signaling contributes to macronutrient preference
independent of VSG, while removal of CD36 signaling blunts the VSG-induced shift
toward carbohydrate preference.
CONCLUSIONS: In the search for more effective and less invasive therapies to help
reverse the global acceleration of obesity and obesity-related disease OEA is a
promising candidate; however, our data indicate that it is not an underlying
mechanism of the effectiveness of VSG.