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Molecular mechanisms of mitochondrial autophagy in the ischemic heart

Research Project

Project/Area Number 19K17601
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 53020:Cardiology-related
Research InstitutionWakayama Medical University (2022-2023)
Yamaguchi University (2019-2021)

Principal Investigator

Toshiro Saito  和歌山県立医科大学, 医学部, 博士研究員 (60648484)

Project Period (FY) 2019-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywords心筋虚血 / ミトコンドリア / マイトファジー / オートファジー / 虚血性心疾患 / mitophagy / autophagy / 虚血再灌流 / 心筋幹細胞移植
Outline of Research at the Start

心臓の虚血および虚血再灌流という病態生理下においてミトコンドリアのautophagy (mitophagy)の分子機構および生物学的意義を検討した。
レポーターであるMito-Keimaを使用して高い定量性を得たこと、培養細胞でなく、心臓の病態生理下において検討したことに新規性がある。
その結果、従来とは異なる分子機構が真に重要であることを解明でき、再灌流時にautophagy/mitophagyを刺激することが新規治療法の戦略となり得るかの検討が可能となった。

Outline of Final Research Achievements

Despite the great advance in recent medical science, numerous patients are still suffering from highly morbid and disabling conditions. Heart failure, a final common state for cardiovascular disease, manifests multiple disorders that exacerbate others (e.g. mitochondrial abnormality, alteration in metabolism, etc.). Accordingly, it appears difficult to identify the ideal target therein to therapeutically intervene. Mitochondrial quality control may be a good candidate for the target.
This study shows that autophagy characterized by Ulk1-dependent and Rab9-positive autophagosomes, distinct from that characterized by LC3-positive autophagosomes, predominantly mediates mitophagy and is responsible for the mitochondrial quality in the heart. Energy stress induces a multi-protein complex consisting of Ulk1, Rab9, Rip1, and Drp1, which recruits late endosome associated with Rab9 to damaged mitochondria through the coordinated actions of Rab9 and Drp1.

Academic Significance and Societal Importance of the Research Achievements

超高齢社会の本邦で慢性心不全は主要な死因である。原疾患として虚血性心疾患の割合が増加している。迅速な血行再建により救命される急性冠症候群の症例は増加したが、心筋障害が大きく、慢性心不全への移行も増加した。従って、血行再建に加えて心筋を保護する新たな治療標的が望まれる。
本研究は心臓のマイトファジーがその治療標的に成り得る可能性を示した。今後は如何にしてマイトファジーを制御するかを検討していく。

Report

(6 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (16 results)

All 2022 2021 2020 2019

All Journal Article (13 results) (of which Int'l Joint Research: 7 results,  Peer Reviewed: 13 results,  Open Access: 11 results) Presentation (3 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results)

  • [Journal Article] Dry preserved multilayered fibroblast cell sheets are a new manageable tool for regenerative medicine to promote wound healing2022

    • Author(s)
      Matsuno Yutaro、Yanagihara Masashi、Ueno Koji、Saito Toshiro、Kurazumi Hiroshi、Suzuki Ryo、Katsura Shunsaku、Oga Atsunori、Hamano Kimikazu
    • Journal Title

      Scientific Reports

      Volume: 12 Issue: 1 Pages: 12519-12519

    • DOI

      10.1038/s41598-022-16345-6

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Perivascular Adipose Tissue Is a Major Source of Nitric Oxide in Saphenous Vein Grafts Harvested via the No‐Touch Technique2022

    • Author(s)
      Saito Toshiro、Kurazumi Hiroshi、Suzuki Ryo、Matsunaga Kazumasa、Tsubone Sarii、Lv Bochao、Kobayashi Sei、Nagase Takashi、Mizoguchi Takahiro、Samura Makoto、Suehiro Kotaro、Harada Takasuke、Morikage Noriyasu、Mikamo Akihito、Hamano Kimikazu
    • Journal Title

      Journal of the American Heart Association

      Volume: 11 Issue: 3

    • DOI

      10.1161/jaha.120.020637

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Ulk1-dependent alternative mitophagy plays a protective role during pressure overload in the heart2022

    • Author(s)
      Nah Jihoon、Shirakabe Akihiro、Mukai Risa、Zhai Peiyong、Sung Eun Ah、Ivessa Andreas、Mizushima Wataru、Nakada Yasuki、Saito Toshiro、Hu Chengchen、Jung Yong Keun、Sadoshima Junichi
    • Journal Title

      Cardiovascular Research

      Volume: 118 Issue: 12 Pages: 2638-2651

    • DOI

      10.1093/cvr/cvac003

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Alternative Mitophagy Protects the Heart Against Obesity-Associated Cardiomyopathy2021

    • Author(s)
      Tong Mingming、Saito Toshiro、Zhai Peiyong、Oka Shin-ichi、Mizushima Wataru、Nakamura Michinari、Ikeda Shohei、Shirakabe Akihiro、Sadoshima Junichi
    • Journal Title

      Circulation Research

      Volume: 129 Issue: 12 Pages: 1105-1121

    • DOI

      10.1161/circresaha.121.319377

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Autologous transplantation of multilayered fibroblast sheets prevents postoperative pancreatic fistula by regulating fibrosis and angiogenesis.2021

    • Author(s)
      Iwamoto K, Saito T, Takemoto Y, Ueno K, Yanagihara M, Furuya-Kondo T, Kurazumi H, Tanaka Y, Taura Y, Harada E, Hamano K
    • Journal Title

      Am J Transl Res

      Volume: 13 Pages: 1257-1268

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Molecular mechanisms and clinical implications of multiple forms of mitophagy in the heart2021

    • Author(s)
      Saito Toshiro、Hamano Kimikazu、Sadoshima Junichi
    • Journal Title

      Cardiovascular Research

      Volume: 117 Issue: 14 Pages: 2730-2741

    • DOI

      10.1093/cvr/cvaa340

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Comprehensive autophagy evaluation in cardiac disease models2020

    • Author(s)
      Kaludercic Nina、Maiuri Maria Chiara、Kaushik Susmita、Fernandez Alvaro F、de Bruijn Jenny、Castoldi Francesca、Chen Yun、Ito Jumpei、Mukai Risa、Murakawa Tomokazu、Nah Jihoon、Pietrocola Federico、Saito Toshiro、Sebti Salwa、Semenzato Martina、Tsansizi Lorenza、Sciarretta Sebastiano、Madrigal-Matute Julio
    • Journal Title

      Cardiovascular Research

      Volume: 116 Issue: 3 Pages: 483-504

    • DOI

      10.1093/cvr/cvz233

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Nuclear β-catenin expression is positively regulated by JAB1 in human colorectal cancer cells2020

    • Author(s)
      Nishimoto Arata、Takemoto Yoshihiro、Saito Toshiro、Kurazumi Hiroshi、Tanaka Toshiki、Harada Eijiro、Shirasawa Bungo、Hamano Kimikazu
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 533 Issue: 3 Pages: 548-552

    • DOI

      10.1016/j.bbrc.2020.09.007

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Preserving the endothelium in saphenous vein graft with both conventional and no-touch preparation2020

    • Author(s)
      Saito Toshiro、Kurazumi Hiroshi、Suzuki Ryo、Matsuno Yutaro、Mikamo Akihito、Hamano Kimikazu
    • Journal Title

      Journal of Cardiothoracic Surgery

      Volume: 15 Issue: 1 Pages: 317-317

    • DOI

      10.1186/s13019-020-01352-3

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] An alternative mitophagy pathway mediated by Rab9 protects the heart against ischemia.2019

    • Author(s)
      Saito T, Nah J, Oka SI, Mukai R, Monden Y, Maejima Y, Ikeda Yoshiyuki, Sciarretta S, Liu T, Li H, Baljinnyam E, Fraidenraich D, Fritzky L, Zhai P, Ichinose S, Isobe M, Hsu CP, Kundu M, Sadoshima J.
    • Journal Title

      Journal of Clinical Investigation

      Volume: 129 Issue: 2 Pages: 802-819

    • DOI

      10.1172/jci122035

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Mitophagy Is Essential for Maintaining Cardiac Function During High Fat Diet-Induced Diabetic Cardiomyopathy.2019

    • Author(s)
      Tong M, Saito T, Zhai P, Oka SI, Mizushima W, Nakamura M, Ikeda S, Shirakabe A, Sadoshima J.
    • Journal Title

      Circ Res

      Volume: 124(9) Issue: 9 Pages: 1360-1371

    • DOI

      10.1161/circresaha.118.314607

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Mitochondrial LonP1 protects cardiomyocytes from ischemia/reperfusion injury in vivo.2019

    • Author(s)
      Venkatesh S, Li M, Saito T, Tong M, Rashed E, Mareedu S, Zhai P, Barcena C, Lopez-Otin C, Yehia G, Sadoshima J, Suzuki CK.
    • Journal Title

      J Mol Cell Cardiol

      Volume: 128 Pages: 38-50

    • DOI

      10.1016/j.yjmcc.2018.12.017

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Hypoxic-conditioned cardiosphere-derived cell sheet transplantation for chronic myocardial infarction.2019

    • Author(s)
      Fujita A, Ueno K, Saito T, Yanagihara M, Kurazumi H, Suzuki R, Mikamo A, Hamano K.
    • Journal Title

      Eur J Cardiothorac Surg

      Volume: 56(6) Issue: 6 Pages: 1062-1074

    • DOI

      10.1093/ejcts/ezz122

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] The central role of Ulk1-dependent autophagy in mediating mitophagy in the heart during ischemia and reperfusion2020

    • Author(s)
      Toshiro Saito, Junichi Sadoshima
    • Organizer
      第97回日本生理学会大会
    • Related Report
      2020 Research-status Report
  • [Presentation] 冠動脈バイパス術の大伏在静脈グラフト採取において、No-touch法がグラフト血管の長期開存をもたらす機序に関する研究2020

    • Author(s)
      齊藤寿郎、藏澄宏之、鈴木亮、美甘章仁、濱野公一
    • Organizer
      第62回日本平滑筋学会総会
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] PRMT5-induced Arginine Methylation Mediates Energy Stress-induced Autophagy in the Heart2019

    • Author(s)
      Risa Mukai, Toshiro Saito, Peiyong Zhai, Junichi Sadoshima
    • Organizer
      Basic cardiovascular Science Scientific Sessions
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research

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Published: 2019-04-18   Modified: 2025-01-30  

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