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Elucidation of the neural circuit mechanism of antidepressant-like effect of dietary polyunsaturated fatty acids

Research Project

Project/Area Number 17K18402
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Neurochemistry/Neuropharmacology
Psychiatric science
Research InstitutionTokyo University of Science (2018-2019)
National Center of Neurology and Psychiatry (2017)

Principal Investigator

Yamada Daisuke  東京理科大学, 薬学部薬学科, 助教 (10621302)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2018: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2017: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords多価不飽和脂肪酸 / うつ様行動 / ドパミン / 側坐核 / 腹側被蓋野 / ドーパミン / 不飽和脂肪酸 / 恐怖記憶 / 神経回路 / シナプス可塑性 / カンナビノイド
Outline of Final Research Achievements

The present study examined the effect of dietary intake of omega3 (ω3) polyunsaturated fatty acids (PUFA)s on depression-like behavior and the relevant neural circuit in the brain in mice.
Mice fed a diet rich in ω3 PUFAs showed shorter immobility time in the forced swim test (FST) than mice fed a control diet. We also found that dopamine and its metabolites increased in the nuncleus accumbens (NAc) in mice fed the diet rich in ω3 PUFA when compared with mice fed the control diet. Notably, the effects of the diet rich in ω3 PUFA on the immobility time in the FST were abolished by microinjection of dopamine receptor antagonists and cannabinoid CB1 receptor antagonist into the NAc.
These results suggest that modulation of the VTA-NAc dopaminergic pathway is one of the mechanisms by which the diet rich in ω3 PUFAs reduces the immobility behavior in the mouse FST.

Academic Significance and Societal Importance of the Research Achievements

これまで不明なまま残されていたオメガ3多価不飽和脂肪酸(ω3 PUFA)経口摂取による抗うつ様作用の神経メカニズムの一端が明らかとなった。特に側坐核を中心とした神経回路がドパミン神経系を介して活性化されることを示唆する結果を得た。また、ω3 PUFAの抗うつ様作用は、申請者の先行研究恐怖記憶とは異なり、ω3とω6の量比ではなくω3含量によって調節されることが明らかとなった。
本研究の成果は、これまで根拠に乏しかったω3 PUFAを含むサプリメントが脳機能に影響を与える作用メカニズムについての科学的根拠を示すものであり、学術的のみならず社会的な意義も大きいものと考えられる。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (3 results)

All 2020 2018

All Journal Article (1 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (2 results) (of which Invited: 1 results)

  • [Journal Article] Participation of the nucleus accumbens dopaminergic system in the antidepressant-like actions of a diet rich in omega-3 polyunsaturated fatty acids2020

    • Author(s)
      Takeuchi Eri、Yamada Daisuke、Suzuki Satoshi、Saitoh Akiyoshi、Itoh Masayuki、Hayashi Takashi、Yamada Mitsuhiko、Wada Keiji、Sekiguchi Masayuki
    • Journal Title

      PLOS ONE

      Volume: 15 Issue: 3 Pages: e0230647-e0230647

    • DOI

      10.1371/journal.pone.0230647

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 多価不飽和脂肪酸バランスによる情動神経回路の修飾メカニズム2018

    • Author(s)
      山田大輔、和田圭司、関口正幸
    • Organizer
      下総薬理研究会
    • Related Report
      2018 Research-status Report
  • [Presentation] 多価不飽和脂肪酸バランスによる情動神経回路の修飾メカニズム2018

    • Author(s)
      山田大輔
    • Organizer
      東京理科大学脳学際研究部門BIRD脳科学セミナー
    • Related Report
      2018 Research-status Report
    • Invited

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Published: 2017-04-28   Modified: 2021-02-19  

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