Increased Levels of Extracellular Dopamine in the Nucleus Accumbens and Amygdala of Rats by Ingesting a Low Concentration of a Long-Chain Fatty Acid

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概要

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• Changes in the extracellular concentration of dopamine (DA) in the nucleus accumbens (NAc) shell and the basolateral amygdala (BLA) resulting from the voluntary ingestion of either corn oil, mineral oil, or 1% linoleic acid diluted with mineral oil as a vehicle were measured in rats by using in vivo microdialysis after they had been trained to establish a preference for corn oil. Ingesting the mineral oil caused no significant change in DA level in the NAc shell, whereas corn oil ingestion significantly increased the DA level during 0–15 min of the test session, reaching the maximum level of 129.8 ± 6.2% compared with the baseline after 10 min. Ingesting linoleic acid also resulted in a significant increase in DA level during 0–20 min, reaching 125.9 ± 9.0% after 10 min. Similar results were obtained in the BLA. Despite its very low calorie content, a low concentration of non-esterified fatty acid increased the DA levels equivalent to those resulting from corn oil in the brain's reward system.

• 公益社団法人 日本農芸化学会の論文

著者

• MATSUMURA Shigenobu

  Laboratory of Nutrition Chemistry, Division of Food Science and Biotechnology, Graduate School of Ag

• Inoue Kazuo

  Laboratory Of Nutrition Chemistry Division Of Food Science And Biotechnology Graduate School Of Agri

• Mizushige Takafumi

  Laboratory Of Nutrition Chemistry Division Of Food Science And Biotechnology Graduate School Of Agri

• Tsuzuki Satoshi

  Laboratory Of Nutrition Chemistry Division Of Food Science And Biotechnology Graduate School Of Agri

• Fushiki Tohru

  Laboratory Of Nutrition Chemistry Division Of Applied Life Sciences Graduate School Of Agriculture K

• ENDO Yuki

  Laboratory of Nutrition Chemistry, Graduate School of Agriculture, Kyoto University

• TSUZUKI Satoshi

  Laboratory of Nutrition Chemistry, Graduate School of Agriculture, Kyoto University

• ADACHI Shin-ichi

  Laboratory of Nutrition Chemistry, Graduate School of Agriculture, Kyoto University

• FUSHIKI Tohru

  Laboratory of Nutrition Chemistry, Graduate School of Agriculture, Kyoto University

• MIZUSHIGE Takafumi

  Laboratory of Nutrition Chemistry, Graduate School of Agriculture, Kyoto University

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