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Research on the molecular neural mechanism of appetite nerve modulation by chronic fatigue

Research Project

Project/Area Number 19K20136
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 59040:Nutrition science and health science-related
Research InstitutionKyoto Tachibana University (2022)
Institute of Physical and Chemical Research (2019-2021)

Principal Investigator

hu di  京都橘大学, 健康科学部, 助教C (60758580)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords慢性疲労 / レプチン / グレリン / ストレス / 内分泌調節 / 内分泌制御異常 / 食欲制御 / 内分泌異常 / 摂食行動 / 食欲ホルモン / 中枢制御異常
Outline of Research at the Start

申請者は疲労の慢性化形成機序を解明するために、独自に慢性疲労モデルを開発した。このモデルは疲労負荷中に意欲低下や身体疼痛だけではなく、疲労負荷後に1週間掛けて緩やかに回復するなど慢性疲労症候群の臨床像に似た症状を示す。申請者が着眼した食欲ホルモンレプチンとグレリンによって、ストレス反応の中枢である視床下部における神経制御の異常や慢性疲労に関連する自律神経の制御異常を示すなど、慢性疲労の形成に強く関与する可能性がある。本研究はこうした中枢制御変調のメカニズム及び関連する脳内領域を同定し、慢性疲労症候群の診断・治療法への応用を目指す。

Outline of Final Research Achievements

To elucidate the mechanism of chronic fatigue formation, we developed a unique animal model. Immediately after fatigue loading, blood ghrelin was elevated and leptin was markedly decreased. Blood ACTH and a-MSH were also elevated. The elevated ghrelin inhibited the POMC nerve in the hypothalamus, but the elevated ACTH/a-MSH downstream of the POMC after the fatigue load indicated the failure of ghrelin to inhibit the POMC nerve, suggesting the possibility of abnormal regulatory function. Furthermore, leptin supplementation in a leptin-depleted animal model significantly restored the amount of spontaneous behavior. Since leptin can freely cross the cerebral blood barrier, the results suggest that improved recovery from fatigue by supplementation may correct the modulation of central appetite control and prevent chronic fatigue even with peripheral intervention.

Academic Significance and Societal Importance of the Research Achievements

本研究で使用した慢性疲労モデルにおいて、血中グレリンの顕著な増加、レプチンの低下、さらにACTHとa-MSHの上昇も認められた。食欲制御中枢では、グレリン増加によるACTHとa-MSHのネガティブフィードバックが作動しなかったことは、長期疲労負荷が原因と考えられ、食欲制御の異常が疲労の慢性化形成に密接な関係が明らかになった。レプチンの補充による自発行動量の有意な改善が、食欲中枢制御の異常是正によるもので、末梢のレプチン介入治療が慢性疲労症候群を改善・予防する可能性が示された。本研究の成果は、慢性疲労症候群の診断・予防・治療法の開発を大きく前進させ、疲労克服社会を実現する基盤を築く。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (8 results)

All 2022 2021 2020

All Journal Article (5 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 5 results,  Open Access: 2 results) Presentation (3 results)

  • [Journal Article] Electrolyzed hydrogen water alleviates abdominal pain through suppression of colonic tissue inflammation in a rat model of inflammatory bowel disease2022

    • Author(s)
      Hu D, Huang T., Shigeta M., Ochi Y., Kabayama S., Watanabe Y., Cui Y.L.
    • Journal Title

      Nutrients

      Volume: 14 Issue: 21 Pages: 4451-4451

    • DOI

      10.3390/nu14214451

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] [18F]DPA-714 imaging for the quantitative evaluation of early spatiotemporal changes of neuroinflammation in rat brain following status epilepticus2022

    • Author(s)
      Ken-ichi Kaneko, Satsuki Irie, Aya Mawatari, Ami Igesaka, Di Hu, Takayoshi Nakaoka, Emi Hayashinaka, Yasuhiro Wada, Hisashi Doi, Yasuyoshi Watanabe and Yilong Cui.
    • Journal Title

      European Journal of Nuclear Medicine and Molecular Imaging

      Volume: 49 Issue: 7 Pages: 2265-2275

    • DOI

      10.1007/s00259-022-05719-7

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Alleviation of the chronic stress response attributed to the antioxidant and anti-inflammatory effects of electrolyzed hydrogen water2021

    • Author(s)
      Hu Di、Li Danxi、Shigeta Mika、Ochi Yuta、Okauchi Takashi、Neyama Hiroyuki、Kabayama Shigeru、Watanabe Yasuyoshi、Cui Yilong
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 535 Pages: 1-5

    • DOI

      10.1016/j.bbrc.2020.12.035

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Homeostatic disturbance of thermoregulatory functions in rats with chronic fatigue2020

    • Author(s)
      Li D, Hu D, Shigeta M, Ochi Y. Watanabe Y, Li F, Cui YL
    • Journal Title

      Neuroscience Research

      Volume: in press Pages: 45-50

    • DOI

      10.1016/j.neures.2020.04.005

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Mapping the alterations of glutamate using Glu-weighted CEST MRI in a rat model of fatigue.2020

    • Author(s)
      Ruili Li, Zhuozhi Dai, Di Hu, Haiyan Zeng, Zeman Fang, Zerui Zhuang, Haiyun Xu, Qingjun Huang, Cui Yilong, Handi Zhang.
    • Journal Title

      Frontiers in Neurology

      Volume: 11 Pages: 589128-589128

    • DOI

      10.3389/fneur.2020.589128

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 疲労の慢性化と神経・内分泌・免疫機能の破綻について2022

    • Author(s)
      胡 迪、渡辺恭良、崔翼龍
    • Organizer
      第18回日本疲労学会学術集会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 慢性疲労動物を用いた疲労の慢性化機序の解析2021

    • Author(s)
      胡迪、李丹溪、重田美香、越智祐太、渡辺恭良、崔翼龍
    • Organizer
      第17回日本疲労学会学術集会
    • Related Report
      2021 Research-status Report
  • [Presentation] 慢性疲労動物を用いた疲労の慢性化機序の解析2020

    • Author(s)
      胡 迪、李丹溪、重田美香、岡内隆、渡辺恭良、崔翼龍
    • Organizer
      第15回日本疲労学会学術集会
    • Related Report
      2020 Research-status Report

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Published: 2019-04-18   Modified: 2024-01-30  

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