ReferenceID 2520
A Neural basis for Octanoic acid regulation of energy balance
Mol Metab
OBJECTIVES: Nutrient sensing by hypothalamic neurons is critical for the regulation of food intake and energy expenditure. We aimed to identify long- and medium-chain fatty acid species transported into the brain, their
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- Reference Id
- 2520
- Evidence Id
- 19110
- Core Evidence Id
- 19110
- Source Reference Id
- 5036
- Herb2 Reference Id
- HBREF005833
- Subject Paper Key
- HBIN037795_32180560
- Pubmed Id
- 32180560
- Doi
- 10.1016/j.molmet.2020.01.002
- Paper Title
- A Neural basis for Octanoic acid regulation of energy balance
- Paper Abstract
- OBJECTIVES: Nutrient sensing by hypothalamic neurons is critical for the regulation of food intake and energy expenditure. We aimed to identify long- and medium-chain fatty acid species transported into the brain, their effects on energy balance, and the mechanisms by which they regulate activity of hypothalamic neurons. METHODS: Simultaneous blood and cerebrospinal fluid (CSF) sampling was undertaken in rats and metabolic analyses using radiolabeled fatty acid tracers were performed on mice. Electrophysiological recording techniques were used to investigate signaling mechanisms underlying fatty acid-induced changes in activity of pro-opiomelanocortin (POMC) neurons. RESULTS: Medium-chain fatty acid (MCFA) octanoic acid (C8:0), unlike long-chain fatty acids, was rapidly transported into the hypothalamus of mice and almost exclusively oxidized, causing rapid, transient reductions in food intake and increased energy expenditure. Octanoic acid differentially regulates the excitability of POMC neurons, activating these neurons directly via GPR40 and inducing inhibition via an indirect non-synaptic, purine, and adenosine receptor-dependent mechanism. CONCLUSIONS: MCFA octanoic acid is a central signaling nutrient that targets POMC neurons via distinct direct and indirect signal transduction pathways to instigate changes in energy status. These results could explain the beneficial health effects that accompany MCFA consumption.
- Journal
- Mol Metab
- Publish Year
- 2020
- Experiment Subject
- mouse; rat
- Experiment Type
- Animal Experiment
- Phenotype Related
- Paper Title Cn
- Paper Title En
- A Neural basis for Octanoic acid regulation of energy balance
- Bilingual Status
- semi_complete