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Analysis on novel mechanism(s) of learning and memory and evaluation of cognitive function using brain-derived exosomes in plasma

Research Project

Project/Area Number 19K23797
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0801:Pharmaceutical sciences and related fields
Research InstitutionKanazawa University

Principal Investigator

Ishimoto Takahiro  金沢大学, 薬学系, 助教 (00843062)

Project Period (FY) 2019-08-30 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords記憶学習 / 脳由来エクソソーム / バイオマーカー / 脳部位特異的遺伝子発現制御
Outline of Research at the Start

記憶学習能力向上作用を有する食物由来抗酸化アミノ酸ergothioneine(ERGO)の作用機序の解明のため、ERGOの経口投与後、記憶学習能力が向上したマウス及び対照群の記憶を司る海馬歯状回(DG)においてプロテオミクス解析を行い、記憶学習能力の向上により発現変動する蛋白質を見出す。次に、マウスにおいて、それら候補蛋白質のDG特異的な発現制御を行い、記憶学習能力や各種シグナル分子を評価する。さらに、記憶学習能力が向上したマウスにおいて、血漿から得られる脳内環境を反映する脳由来エクソソーム中の、候補蛋白質の量と記憶学習能力との相関を分析し、血漿成分から記憶学習能力を評価する系の確立を目指す。

Outline of Final Research Achievements

Ergothioneine (ERGO) is known to enhance cognitive function in human. Proteome analysis in mice showed oral administration of ERGO remarkably increased several proteins in hippocampal dentate gyrus (DG). Knockdown of a candidate protein in murine hippocampal DG by adeno-associated virus significantly enhanced neurite outgrowth, which may be one of the mechanisms underlying cognitive enhancement by ERGO.
Protein expression profile on exosomes derived from the brain in plasma may reflect the ERGO-induced enhancement of cognitive function. Expression of a candidate protein on exosomes in serum was associated with ERGO exposure and cognitive function, which might be a possible biomarker for assessment of ERGO-induced beneficial activity in the human brain.

Academic Significance and Societal Importance of the Research Achievements

ヒトの認知機能を改善させるERGOの作用機序として、記憶を司る海馬歯状回におけるある候補蛋白質による神経突起の伸長が関与する可能性を示唆した。
認知機能の判定には、実験動物では行動試験、ヒトでは種々の認知機能検査が必要であるが、心理的要因などによるデータのばらつきが問題となり、より定量的な指標の確立が求められている。本研究で見出した脳内環境を反映する脳由来エクソソーム内の分子が、認知機能の改善を推測するバイオマーカーになる可能性がある。

Report

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

    (15 results)

All 2021 2020 2019

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 1 results) Presentation (11 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results)

  • [Journal Article] Regulation of Neurogenesis by Organic Cation Transporters: Potential Therapeutic Implications2021

    • Author(s)
      Ishimoto Takahiro、Kato Yukio
    • Journal Title

      Handbook of Experimental Pharmacology

      Volume: - Pages: 281-300

    • DOI

      10.1007/164_2021_445

    • ISBN
      9783030829834, 9783030829841
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Oral Administration of the Food Derived Hydrophilic Antioxidant Ergothioneine Enhances Object Recognition Memory in Mice2020

    • Author(s)
      Nakamichi N, Nakao S, Nishiyama M, Takeda Y, Ishimoto T, Masuo Y, Matsumoto S, Suzuki M, Kato Y.
    • Journal Title

      Curr Mol Pharmacol

      Volume: - Issue: 2 Pages: 220-233

    • DOI

      10.2174/1874467213666200212102710

    • Related Report
      2020 Annual Research Report 2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Homostachydrine is a Xenobiotic Substrate of OCTN1/SLC22A4 and Potentially Sensitizes Pentylenetetrazole-Induced Seizures in Mice2020

    • Author(s)
      Nishiyama Misa、Nakamichi Noritaka、Yoshimura Tomoyuki、Masuo Yusuke、Komori Tomoe、Ishimoto Takahiro、Matsuo Jun-ichi、Kato Yukio
    • Journal Title

      Neurochemical Research

      Volume: 45 Issue: 11 Pages: 2664-2678

    • DOI

      10.1007/s11064-020-03118-8

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Maturational Characterization of Mouse Cortical Neurons Three-Dimensionally Cultured in Functional Polymer FP001-Containing Medium2019

    • Author(s)
      Nakamichi N, Matsumoto Y, Kawanishi T, Ishimoto T, Masuo Y, Horikawa M, Kato Y
    • Journal Title

      Biological and Pharmaceutical Bulletin

      Volume: 42 Issue: 9 Pages: 1545-1553

    • DOI

      10.1248/bpb.b19-00307

    • NAID

      130007700083

    • ISSN
      0918-6158, 1347-5215
    • Year and Date
      2019-09-01
    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Proliferative effect of tri-deoxyribonucleotides on mouse neural stem cells.2021

    • Author(s)
      Ishimoto T, Matsumura N, Masuo Y, Kiriyama K, Sutoh K, Kato Y
    • Organizer
      第94回日本薬理学会年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Oral administration of food-derived amino acid ergothioneine enhances learning and memory by phosphorylation of TrkB and promotion of neurogenesis in the hippocampal dentate gyrus.2021

    • Author(s)
      Matsuo Y, Ishimoto T, Nakao S, Masuo Y, Matsumoto S, Suzuki M, Kato Y
    • Organizer
      第94回日本薬理学会年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Amount of phosphorylated TrkB in serum extracellular vesicles reflect ergothioneine-induced enhancement of cognitive function.2021

    • Author(s)
      Matsumoto R, Ishimoto T, Matsumoto S, Masuo Y, Suzuki M, Kato Y
    • Organizer
      日本薬学会第141年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Transporter-mediated Ergothioneine Uptake Promotes Neuronal Differentiation through Activating NT5/TrkB/mTORC1 Signaling in Neural Stem Cells2020

    • Author(s)
      Ishimoto T, Nakamichi N, and Kato Y
    • Organizer
      New Frontier in Neuroscience
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] P-gp及びBcrp阻害剤のマウス神経幹細胞生存率に及ぼす影響2020

    • Author(s)
      石本尚大、高田健矢、増尾友佑、加藤将夫
    • Organizer
      日本薬学会第140年会
    • Related Report
      2019 Research-status Report
  • [Presentation] ヒト血液中細胞外膜小胞におけるリン酸化TrkBの測定と食物由来抗酸化物質による変化2020

    • Author(s)
      松本留里、石本尚大、松本聡、増尾友佑、鈴木真、加藤将夫
    • Organizer
      第93回日本薬理学会年会
    • Related Report
      2019 Research-status Report
  • [Presentation] マウス神経幹細胞における薬物排出トランスポーターの発現プロファイル2020

    • Author(s)
      高田健矢、石本尚大、増尾友佑、加藤将夫
    • Organizer
      第93回日本薬理学会年会
    • Related Report
      2019 Research-status Report
  • [Presentation] 腎血流速度の評価に応用可能な生体内物質の網羅的探索2020

    • Author(s)
      及川夏月、増尾友佑、石本尚大、加藤将夫
    • Organizer
      第93回日本薬理学会年会
    • Related Report
      2019 Research-status Report
  • [Presentation] 網羅的メタボロミクス解析による膜輸送体OCTN1脳内基質探索, 第93回日本薬理学会年会2020

    • Author(s)
      西山美沙、吉村智之、増尾友佑、石本尚大、中道範隆、松尾淳一、加藤将夫
    • Organizer
      第93回日本薬理学会年会
    • Related Report
      2019 Research-status Report
  • [Presentation] Functional Expression of Xenobiotic Transporters in Neural Stem Cells.2019

    • Author(s)
      Ishimoto T, Masuo Y, and Kato Y
    • Organizer
      The 3rd Workshop for Japan-Korea Young Scientists on Pharmaceutics
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Enhancement of Neurogenesis by OCTN1-mediated Ergothioneine Transport.2019

    • Author(s)
      Ishimoto T
    • Organizer
      APSTJ Global Education Seminar
    • Related Report
      2019 Research-status Report
    • Invited

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Published: 2019-09-03   Modified: 2022-01-27  

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