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Elucidation of the brain mechanisms of sugar preference by SIRT1

Research Project

Project/Area Number 19K11738
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 59040:Nutrition science and health science-related
Research InstitutionKyoto University

Principal Investigator

Matsui Sho  京都大学, 農学研究科, 助教 (80739673)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
KeywordsOxytocin / FGF21 / 糖 / 嗜好性 / アデノ随伴ウイルス / SIRT1
Outline of Research at the Start

肥満症治療に食事療法と運動療法は欠かせないが、患者のアドヒアランスが低いことが課題である。食餌療法を必要とする患者のアドヒアランスを下げる要因の一つが糖質である。糖質は、高嗜好性かつ行動強化力が高く、肥満症患者の多くの特徴であるエネルギーの過剰摂取や間食の習慣化などの食行動の乱れを引き起こす。そこで、糖質嗜好性メカニズムの解明をとおし、患者が遵守できる食事療法の開発につなげることを目指す。本研究では、未解明な課題として残る糖質嗜好性制御の根底にある脳内のメカニズムの解明を行う。

Outline of Final Research Achievements

Oxytocin (Oxt) neurons are mainly located in two places within the brain, the paraventricular nucleus of the hypothalamus (PVH) and supraoptic nucleus of the hypothalamus (SON). Therefore, we asked which Oxt neurons are responsible for regulating simple sugar preference and the effect of SIRT1 on diet selection in mice.
Intraperitoneal injection of the recombinant murine FGF21 to mice induced c-Fos in approximately 13 % of PVH Oxt, but no significant activation was detected in SON Oxt neurons. Therefore, PVH Oxt neurons are one of the target of FGF21 in the hypothalamus.
We next manipulated the SIRT1 expression levels in PVH vs. SON Oxt neurons by injecting Cre-inducible SIRT1 (WT or enzyme-dead H355Y mutant) AAV vector to Oxt-ires Cre mice. The overexpression of SIRT1-WT in PVH Oxt neurons significantly suppressed simple sugar preference, but no significant effect was observed in the SON-injected group. Therefore, SIRT1 suppresses simple sugar preference through PVH Oxt neurons in mice.

Academic Significance and Societal Importance of the Research Achievements

糖質は食行動の引き金として強力に作用し、必要以上のエネルギー摂取をもたらすことで、肥満発症の要因になる。肥満症に用いられる治療薬は、中枢・末梢神経系や心臓に対する重篤な副作用が多く認められる。本研究の成果から、オキシトシンニューロンのタイプや投射先の脳領域を特定することができれば、糖質嗜好性が原因となる肥満症に対して、より特異性が高く副作用の少ない抗肥満薬の開発につながることが期待される。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (9 results)

All 2022 2021 2020 2019

All Journal Article (1 results) Presentation (7 results) (of which Int'l Joint Research: 2 results,  Invited: 5 results) Book (1 results)

  • [Journal Article] うま味と味覚嗜好性 SIRT1による糖質嗜好性制御メカニズムの解明2019

    • Author(s)
      松居 翔
    • Journal Title

      日本味と匂学会誌

      Volume: 26巻 Pages: 89-93

    • Related Report
      2019 Research-status Report
  • [Presentation] 糖質欲求を制御する生体シグナルの解明2022

    • Author(s)
      松居 翔、井上 可南子、岡 和來、岩間 大貴、Oulan Efendi、小栗 靖生、都築 巧、佐々木 努
    • Organizer
      第42回日本肥満学会・第39回日本肥満症治療学会学術集会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 単純糖質に対する嗜好性制御機構2021

    • Author(s)
      松居 翔
    • Organizer
      蛋白研セミナー:食行動の脳内基盤と分子機構
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] Neuronal SIRT1 regulates macronutrient-based diet selection through FGF21 and oxytocin signalling in mice2020

    • Author(s)
      松居 翔
    • Organizer
      日本生理学会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] Oxytocin neuron in the paraventricular nucleus of the hypothalamus regulates FGF21- and SIRT1-based simple sugar preference in mice.2019

    • Author(s)
      Matsui S, Sasaki T, Kohno D, Yokota-Hashimoto H, Kobayashi M, Kitamura T.
    • Organizer
      Keystone Symposia on Molecular and Cellular Biology (Functional Neurocircuitry of Feeding and Feeding Disorders)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Neuronal SIRT1 regulates macronutrient-based diet selection through FGF21 and oxytocin signalling in mice.2019

    • Author(s)
      Sasaki T, Matsui S, Kohno D, Kitamura T.
    • Organizer
      Keystone Symposia on Molecular and Cellular Biology (Functional Neurocircuitry of Feeding and Feeding Disorders)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Elucidation of the regulatory mechanisms of carbohydrate preference by SIRT12019

    • Author(s)
      松居 翔
    • Organizer
      アディポサイエンス・ シンポジウム - 日本肥満学会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] Elucidation of the regulatory mechanisms of sugar preference by SIRT12019

    • Author(s)
      松居 翔
    • Organizer
      日本分子生物学会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Book] 循環器内科2021

    • Author(s)
      松居 翔、佐々木 努
    • Total Pages
      368
    • Publisher
      科学評論社
    • Related Report
      2021 Annual Research Report

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Published: 2019-04-18   Modified: 2023-01-30  

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