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Contribution of protein recycling system for the maintenance of skeletal muscle mass

Research Project

Project/Area Number 18H04080
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Review Section Medium-sized Section 59:Sports sciences, physical education, health sciences, and related fields
Research InstitutionTohoku University

Principal Investigator

Nagatomi Ryoichi  東北大学, 医工学研究科, 教授 (20208028)

Co-Investigator(Kenkyū-buntansha) 中村 友浩  大阪工業大学, 工学部, 教授 (30217872)
村山 和隆  東北大学, 医工学研究科, 准教授 (40400452)
鈴木 直輝  東北大学, 医学系研究科, 非常勤講師 (70451599)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥44,590,000 (Direct Cost: ¥34,300,000、Indirect Cost: ¥10,290,000)
Fiscal Year 2020: ¥13,520,000 (Direct Cost: ¥10,400,000、Indirect Cost: ¥3,120,000)
Fiscal Year 2019: ¥12,740,000 (Direct Cost: ¥9,800,000、Indirect Cost: ¥2,940,000)
Fiscal Year 2018: ¥18,330,000 (Direct Cost: ¥14,100,000、Indirect Cost: ¥4,230,000)
Keywords骨格筋 / プロテアソーム / アミノペプチダーゼ / リサイクル / アミノ酸 / サルコペニア / 分化 / 細胞周期 / 腸管平滑筋 / 骨格筋衛星細胞 / P53依存性アポトーシス / アミノ酸プール / 細胞内ATP量
Outline of Final Research Achievements

Proteolysis has long been considered deleterious to skeletal muscle. Recent studies, however, have identified that impaired proteolytic function leads to loss instead of an increase in skeletal muscle mass. Dysfunction in the proteasome-dependent proteolytic pathway in skeletal muscle induced more significant loss or impaired development than dysfunction in the autophagy pathway. Although we failed to detect the recycling of degradation derived amino acids for de-novo protein synthesis, we found the induction of various aminopeptidases linked to the proteasome-dependent proteolytic pathway. Each aminopeptidase in cultured myoblasts demonstrated essential roles, such as the regulations of ATP concentration, cell cycle and initiation of differentiation, and determination of polarity and structure of myotubes. Although further studies are required to elucidate the underlying mechanisms, we could demonstrate the essential roles of post-proteolytic aminopeptidases in developing myoblasts.

Academic Significance and Societal Importance of the Research Achievements

骨格筋の量や機能の維持は競技スポーツのみならず健康領域においても重要である。従来タンパク質分解は筋量維持に対してマイナスと捉えられていたが、むしろ筋量や機能の維持には不可欠であることがわかってきた。われわれは今回そのメカニズムとして初めてタンパク質分解経路が単純なリサイクルではなく、筋芽細胞を筋形成に向かわせるか否かや、形態の決定を行っていることなどを明らかにした。これは健全な骨格筋を保つには単にタンパク質分解指標に基づく、分解抑制や、分解で不足する材料の補充を行うだけでは不十分であること、適切な分解の状態を維持するための栄養やトレーニングなどの戦略を再考する必要性を示唆するものである。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • Research Products

    (17 results)

All 2021 2020 2019 2018 Other

All Journal Article (5 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 4 results) Presentation (10 results) (of which Int'l Joint Research: 3 results) Remarks (2 results)

  • [Journal Article] タンパク質分解経路が筋芽細胞の増殖と分化に与える影響2021

    • Author(s)
      長名シオン, 永富良一
    • Journal Title

      体力科学

      Volume: 70 Pages: 60-60

    • NAID

      130007967736

    • Related Report
      2020 Annual Research Report
  • [Journal Article] Puromycin‐sensitive aminopeptidase is required for C2C12 myoblast proliferation and differentiation2020

    • Author(s)
      Osana Shion、Kitajima Yasuo、Suzuki Naoki、Nunomiya Aki、Takada Hiroaki、Kubota Takahiro、Murayama Kazutaka、Nagatomi Ryoichi
    • Journal Title

      Journal of Cellular Physiology

      Volume: 236 Issue: 7 Pages: 5293-5305

    • DOI

      10.1002/jcp.30237

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] siRNA knockdown of alanine aminopeptidase impairs myoblast proliferation and differentiation2020

    • Author(s)
      Osana Shion、Kitajima Yasuo、Suzuki Naoki、Xu Yidan、Murayama Kazutaka、Nagatomi Ryoichi
    • Journal Title

      Experimental Cell Research

      Volume: 397 Issue: 1 Pages: 112337-112337

    • DOI

      10.1016/j.yexcr.2020.112337

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] The Impact of Intracellular Aminopeptidase on C2C12 Myoblast Proliferation and Differentiation2020

    • Author(s)
      Shion Osana , Kazutaka Murayama , Ryoichi Nagatomi
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 524 (3) Issue: 3 Pages: 608-613

    • DOI

      10.1016/j.bbrc.2020.01.115

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] The Ubiquitin-Proteasome System Is Indispensable for the Maintenance of Muscle Stem Cells2018

    • Author(s)
      Kitajima Yasuo、Suzuki Naoki、Nunomiya Aki、Osana Shion、Yoshioka Kiyoshi、Tashiro Yoshitaka、Takahashi Ryosuke、Ono Yusuke、Aoki Masashi、Nagatomi Ryoichi
    • Journal Title

      Stem Cell Reports

      Volume: 11 Issue: 6 Pages: 1523-1538

    • DOI

      10.1016/j.stemcr.2018.10.009

    • NAID

      120007006241

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 長名シオン, 永富良一2020

    • Author(s)
      タンパク質分解経路が筋芽細胞の増殖と分化に与える影響
    • Organizer
      日本体力医学会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 骨格筋細胞におけるアミノペプチダーゼの役割2020

    • Author(s)
      長名シオン, 永富良一
    • Organizer
      骨格筋生物学研究会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Inhibition of leucine aminopeptidase affects myocyte proliferation and differentiation2020

    • Author(s)
      Shion Osana, Kazutaka Murayama, Naoki Suzuki, Hiroaki Takada, Takahiro Kubota, Ryoichi Nagatomi
    • Organizer
      Experimental Biology
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ユビキチン‐プロテアソーム系は筋幹細胞の恒常性維持に必須である2019

    • Author(s)
      北嶋康雄, 鈴木直輝, 布宮亜樹, 長名シオン, 吉岡潔志, 田代善崇, 高橋良輔, 小野悠介, 青木正志, 永富良一
    • Organizer
      日本筋学会学術集会
    • Related Report
      2019 Annual Research Report
  • [Presentation] ユビキチン-プロテアソーム系は筋幹細胞の恒常性維持に必須である2019

    • Author(s)
      北嶋 康雄, 鈴木 直輝, 布宮 亜樹, 長名 シオン, 吉岡 潔志, 田代 善崇, 高橋 良輔, 小野 悠介, 青木 正志, 永富 良一
    • Organizer
      基礎老化研究
    • Related Report
      2019 Annual Research Report
  • [Presentation] 骨格筋細胞におけるプロテアソームの役割~アミノ酸リサイクルの検証~2019

    • Author(s)
      長名シオン
    • Organizer
      第7回骨格筋生物学研究会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Study of the protein synthesis in muscle cells using non-canonical amino acids2018

    • Author(s)
      長名シオン、布宮亜樹、高田拓明、鈴木直輝、青木正志、永富良一
    • Organizer
      23rd annual congress of the European College of Sports Science
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 骨格筋におけるプロテアソームの役割解明2018

    • Author(s)
      北嶋 康雄、鈴木 直輝、布宮亜樹、長名シオン、田代善崇、高橋良輔、小野 悠介、青木正志、永富良一
    • Organizer
      第4回日本筋学会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 三次元培養筋におけるリアノジン受容体の組織化学的解析2018

    • Author(s)
      布宮亜樹、丹藤由希子、長名シオン、久保田雄大、黒田尚志、高田拓明、張リーイン、芝原達規、永富良一
    • Organizer
      第2回OITem研究会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Is muscle damage affected by gut bacteria elimination -an MRI study.2018

    • Author(s)
      布宮亜樹、長名シオン、高田拓明、永富良一
    • Organizer
      23rd annual congress of the European College of Sport Science
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Remarks] 永富教授らのグループの研究の成果がStem Cell Reportsに掲載されました

    • URL

      http://www.bme.tohoku.ac.jp/news/?news=20181221161755&ref=/news/&target=index/

    • Related Report
      2018 Annual Research Report
  • [Remarks] 筋肉の幹細胞を正常に保つ仕組みを解明 筋肉の再生医療への応用に期待

    • URL

      https://www.tohoku.ac.jp/japanese/2018/11/press20181109-1-kinniku.html

    • Related Report
      2018 Annual Research Report

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Published: 2018-04-23   Modified: 2022-01-27  

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