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The role of post-proteolytic aminopeptidases in skeletal muscle homeostasis

Research Project

Project/Area Number 21H04857
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) 神崎 展  東北大学, 医工学研究科, 教授 (10272262)
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, 大学病院, 助教 (70451599)
長名 シオン  国士舘大学, 体育学部, 講師 (60868131)
Project Period (FY) 2021-04-05 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥42,250,000 (Direct Cost: ¥32,500,000、Indirect Cost: ¥9,750,000)
Fiscal Year 2023: ¥13,390,000 (Direct Cost: ¥10,300,000、Indirect Cost: ¥3,090,000)
Fiscal Year 2022: ¥13,650,000 (Direct Cost: ¥10,500,000、Indirect Cost: ¥3,150,000)
Fiscal Year 2021: ¥15,210,000 (Direct Cost: ¥11,700,000、Indirect Cost: ¥3,510,000)
Keywords骨格筋 / タンパク分解 / アミノペプチダーゼ / 分化 / オリゴペプチド
Outline of Research at the Start

申請者らはこれまで骨格筋細胞内のタンパク質分解経路を遮断すると骨格筋の著しい萎縮が起きることから、タンパク質分解プロセスが骨格筋の維持に不可欠であることを明らかにしてきた。分解産物の新たなタンパク合成へのリサイクルは認められなかったことから、タンパク質分解産物であるオリゴペプチド処理を担うアミノペプチダーゼに着目した結果、アミノペプチダーゼ群に筋芽細胞の細胞周期・分化制御など多彩な生理的機能が存在する可能性を見出した。本研究は骨格筋の量や質の維持に対するプロテアソーム・アミノペプチダーゼ系によるタンパク質分解経路の寄与の解明を目指す。

Outline of Final Research Achievements

Skeletal muscle satellite cells, essential for maintaining and increasing muscle mass, are metabolically inactive but are lost through cell death when proteasome function, which performs protein degradation, is inhibited. Proteasome inhibition also affects the cell cycle and differentiation when satellite cells are activated and transformed into myoblasts. This study revealed that various aminopeptidases that process the degradation products of proteasomes in the form of oligopeptides play an important role in the cell cycle and muscle differentiation such as the fusion of myoblasts, and morphogenesis depending on the polarity of the myoblasts. Specifically, it was found that inhibition of leucine aminopeptidase 3 initiated myoblast differentiation without other treatment required for differentiation, and the deletion mice showed growth impairment. It was clarified that protein degradation is as important as synthesis for skeletal muscle tissue.

Academic Significance and Societal Importance of the Research Achievements

物質やエネルギーの代謝には必ず合成と分解があるように骨格筋組織にも合成と分解がある。骨格筋量維持・増量に蛋白質合成の重要性が着目されてきたが、分解相も同様に重要である。しかし分解後の分解産物の運命についてはほとんど明らかになっていなかった。本研究では骨格筋の成長に重要な筋芽細胞において蛋白分解産物であるオリゴペプチドの処理に種々のアミノペプチダーゼが関与すること、またそれぞれを欠失させると筋芽細胞の増殖・分化して筋細胞として構造を形成する過程に大きく影響することが明らかになった。骨格筋にとって蛋白質合成は重要であるが、蛋白質分解が健全に行われることもそれ以上に重要であることを明らかにした。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Comments on the Screening Results   Annual Research Report
  • Research Products

    (15 results)

All 2024 2023 2022 2021 Other

All Journal Article (6 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 4 results) Presentation (8 results) (of which Int'l Joint Research: 2 results) Remarks (1 results)

  • [Journal Article] 腫瘍組織内好中球の免疫代謝リワイヤリングとガン免疫2024

    • Author(s)
      神崎 展
    • Journal Title

      実験医学

      Volume: 42 Pages: 54-55

    • Related Report
      2023 Annual Research Report
  • [Journal Article] The aminopeptidase LAP3 suppression accelerates myogenic differentiation via the AKT‐TFE3 pathway in C2C12 myoblasts2023

    • Author(s)
      Osana Shion、Kitajima Yasuo、Naoki Suzuki、Murayama Kazutaka、Takada Hiroaki、Tabuchi Ayaka、Kano Yutaka、Nagatomi Ryoichi
    • Journal Title

      Journal of Cellular Physiology

      Volume: 238 Issue: 9 Pages: 2103-2119

    • DOI

      10.1002/jcp.31070

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Effects of CX3CR1 and CXCR2 antagonists on running-dependent intramuscular neutrophil recruitments and myokine upregulation2023

    • Author(s)
      Nyasha MR, Chen W, Wang H, Yaoita F, Aoki M, Nagatomi R, Kanzaki M.
    • Journal Title

      Am J Physiol Endocrinol Metab.

      Volume: 324 Issue: 5 Pages: E375-E389

    • DOI

      10.1152/ajpendo.00196.2022

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] LRRK2 negatively regulates glucose tolerance via regulation of membrane translocation of GLUT4 in adipocytes.2023

    • Author(s)
      Kawakami Fumitaka、Imai Motoki、Isaka Yuki、Cookson Mark R.、Maruyama Hiroko、Kubo Makoto、Farrer Matthew J.、Kanzaki Makoto、Kawashima Rei、Maekawa Tatsunori、Tamaki Shun、Kurosaki Yoshifumi、Kojima Fumiaki、Ohba Kenichi、Ichikawa Takafumi
    • Journal Title

      FEBS Open Bio

      Volume: 13 Issue: 12 Pages: 2200-2214

    • DOI

      10.1002/2211-5463.13717

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] 運動骨格筋内の好中球集積微小領域と筋機能の保持2023

    • Author(s)
      神崎 展
    • Journal Title

      血液内科

      Volume: 87 Pages: 309-315

    • Related Report
      2023 Annual Research Report
  • [Journal Article] Little involvement of recycled-amino acids from proteasomal proteolysis in de novo protein synthesis2022

    • Author(s)
      Shion Osana, Yasuo Kitajima, Suzuki Naoki, Hiroaki Takada, Kazutaka Murayama, Yutaka Kano, Ryoichi Nagatomi
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 634 Pages: 40-47

    • DOI

      10.1016/j.bbrc.2022.09.113

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] ロイシンアミノペプチダーゼLAP3の発現抑制は筋分化を促進する,2023

    • Author(s)
      長名シオン
    • Organizer
      第46回日本分子生物学会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Investigation of Roles of CEFIP in Physical Fitness and Glucose Metabolism using Knockout Mice; a Running Model Study.2023

    • Author(s)
      Nyasha, MR., Tachikawa, J., Chen, W., and Kanzaki, M
    • Organizer
      nterface Summer Seminar 2023, The 18th International Workshop on Biomaterials in Interface Science
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The Interface Between Muscular Microvasculature and Post-Exercise Myofibers That Primes Insulin-Responsive Local GLUT4 Translocation: Multi-photon Microscopy Analysis.2023

    • Author(s)
      Chen,W., Komatsuzaki, H., and Kanzaki, M
    • Organizer
      nterface Summer Seminar 2023, The 18th International Workshop on Biomaterials in Interface Science
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 2分割発光酵素手法を用いたACE2とB0AT1複合体の即時発光計測2023

    • Author(s)
      福島英得,佐藤 遼,神﨑 展
    • Organizer
      第46回日本分子生物学会
    • Related Report
      2023 Annual Research Report
  • [Presentation] アミノペプチダーゼによる筋分化制御メカニズムの解明2022

    • Author(s)
      Shion Osana, Yasuo Kitajima, Suzuki Naoki, Hiroaki Takada, Kazutaka Murayama, Yutaka Kano, Ryoichi Nagatomi.
    • Organizer
      第8回日本筋学会
    • Related Report
      2022 Annual Research Report
  • [Presentation] ペプチド分解酵素による筋分化制御機構の解明2022

    • Author(s)
      長名シオン, 北嶋康雄, 鈴木直輝, 村山和隆, 永富良一, 狩野豊
    • Organizer
      第77回日本体力医学会
    • Related Report
      2022 Annual Research Report
  • [Presentation] ペプチド分解酵素LAP3による筋量調節機構の解明2022

    • Author(s)
      長名シオン, 北嶋康雄, 鈴木直輝, 高田拓明, 村山和隆, 狩野豊, 永富良一
    • Organizer
      第9回骨格筋生物学研究会
    • Related Report
      2022 Annual Research Report
  • [Presentation] ペプチド分解酵素アミノペプチダーゼによる筋芽細胞の分化制御2021

    • Author(s)
      長名シオン、永富良一
    • Organizer
      日本体力医学会
    • Related Report
      2021 Annual Research Report
  • [Remarks] 筋肉形成におけるペプチド分解酵素の新たな役割を発見 -筋細胞の増殖・分化制御の理解への貢献が期待-

    • URL

      https://www.tohoku.ac.jp/japanese/2021/01/press20210118-01-psa.html

    • Related Report
      2022 Annual Research Report

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Published: 2021-04-28   Modified: 2025-01-30  

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