A gut lipid messenger links excess dietary fat to dopamine deficiency.
paper
Cited
Public
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- Authors
- Tellez, Luis A; Medina, Sara; Han, Wenfei; Ferreira, Jozelia G; Licona-LimΓ³n, Paula; Ren, Xueying; Lam, Tukiet T; Schwartz, Gary J; de Araujo, Ivan E
- Year
- 2013
- Journal
- Science (New York, N.Y.)
- PMID
- 23950538
- DOI
- 10.1126/science.1239275
Excessive intake of dietary fats leads to diminished brain dopaminergic function. It has been proposed that dopamine deficiency exacerbates obesity by provoking compensatory overfeeding as one way to restore reward sensitivity. However, the physiological mechanisms linking prolonged high-fat intake to dopamine deficiency remain elusive. We show that administering oleoylethanolamine, a gastrointestinal lipid messenger whose synthesis is suppressed after prolonged high-fat exposure, is sufficient to restore gut-stimulated dopamine release in high-fat-fed mice. Administering oleoylethanolamine to high-fat-fed mice also eliminated motivation deficits during flavorless intragastric feeding and increased oral intake of low-fat emulsions. Our findings suggest that high-fat-induced gastrointestinal dysfunctions play a key role in dopamine deficiency and that restoring gut-generated lipid signaling may increase the reward value of less palatable, yet healthier, foods.
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