• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Regulation of cardiac and vascular function via membrane trafficking mediated by class II PI3K

Research Project

Project/Area Number 20K07260
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 48020:Physiology-related
Research InstitutionThe University of Tokyo (2021-2022)
Kanazawa University (2020)

Principal Investigator

Aki Sho  東京大学, 先端科学技術研究センター, 特任助教 (80767210)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2022: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywordsホスホイノシタイド / ミトコンドリア / ミトコンドリア融合 / PIPs / オルガネライメージング / ミトコンドリアダイナミクス / PI3K / エンドサイトーシス / ミトファジー / 循環調節
Outline of Research at the Start

エンドサイトーシスを駆動するクラスII型PI3K-C2α, -C2βを介する心臓・血管機能調節の仕組みを、PI3K-PI3K-C2α, -C2βの発現が高い心筋、平滑筋それぞれの特異的KOマウスを作製・解析し、PI3K-C2α, -C2βの心臓・血管作用の機構を細胞及びマウス個体レベルで解明する事で、循環調節の分子機構の理解に新たなフレームワークを与える。

Outline of Final Research Achievements

Cardiac-specific PI3KII double knockout (DKO) mice showed mitochondrial abnormalities and cardiac dysfunction. Furthermore, PI3KII knockdown (KD) induced excessive mitochondrial fragmentation, and it was found that PI(3,4)P2 metabolized by PI3KIIs acts on the outer mitochondrial membrane to initiate mitochondrial fusion. Furthermore, in PI3KIIs KD cells, the accumulation of PI(4)P promoted excessive division and fragmentation of mitochondria, leading to impaired mitochondrial function and the accumulation of reactive oxygen species. These findings suggest that the excessive mitochondrial fragmentation observed in PI3KIIs KD cells can cause severe mitochondrial functional abnormalities.

Academic Significance and Societal Importance of the Research Achievements

ミトコンドリアは「エネルギー産生を担う均質なオルガネラ」という古典的概念から「代謝コミュニケーションにより高次機能を制御するオルガネラ」へと変貌してきた。ミトコンドリアの融合と分裂(ミトコンドリアダイナミクス)のバランスは、ミトコンドリアの形態・機能を維持する生命現象の根幹とも言えるイベントであるが、未だメカニズムの十分な解明には至っていない。本研究成果から、PI(3,4)P2が未解明であったミトコンドリア融合機構を担うPIPs代謝物であることが明らかとなったに留まらず、代謝物により制御されるオルガネラ恒常性維持機構という新たな視点から、細胞生理学・病態生理学に新たなフレームワークを与える。

Report

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

    (20 results)

All 2023 2022 2021 2020

All Journal Article (8 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 8 results,  Open Access: 8 results) Presentation (12 results) (of which Int'l Joint Research: 1 results,  Invited: 4 results)

  • [Journal Article] Cancer metabolism within tumor microenvironments2023

    • Author(s)
      Aki Sho、Nakahara Ryuichi、Maeda Keisuke、Osawa Tsuyoshi
    • Journal Title

      Biochimica et Biophysica Acta (BBA) - General Subjects

      Volume: 1867 Issue: 5 Pages: 130330-130330

    • DOI

      10.1016/j.bbagen.2023.130330

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Metabolic adaptations of cancer in extreme tumor microenvironments2023

    • Author(s)
      Ryuichi Nakahara、Keisuke Maeda、Sho Aki、Tsuyoshi Osawa
    • Journal Title

      Cancer Science

      Volume: 114 Issue: 4 Pages: 1200-1207

    • DOI

      10.1111/cas.15722

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Convergent genomic diversity and novel BCAA metabolism in intrahepatic cholangiocarcinoma2023

    • Author(s)
      Kitagawa A, Osawa T,Noda M,Kobayashi Y, Aki S,Nakano Y,Saito T,Shimizu D,Komatsu H,Sugaya M,Takahashi J,...Mimori K.
    • Journal Title

      Br J Cancer

      Volume: - Issue: 12 Pages: 22068-22068

    • DOI

      10.1038/s41416-023-02256-4

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Pathological complete remission of relapsed tumor by photo‐activating antibody-mimetic drug conjugate treatment2022

    • Author(s)
      Kaneko Yudai、Yamatsugu Kenzo、Yamashita Takefumi、Takahashi Kazuki、Tanaka Toshiya、Aki Sho、Tatsumi Toshifumi、Kawamura Takeshi、Miura Mai、Ishii Masazumi、Ohkubo Kei、Osawa Tsuyoshi、Kodama Tatsuhiko、Ishikawa Shumpei、Tsukagoshi Masanobu、Chansler Michael、Sugiyama Akira、Kanai Motomu、Katoh Hiroto
    • Journal Title

      Cancer Science

      Volume: 113 Issue: 12 Pages: 4350-4362

    • DOI

      10.1111/cas.15565

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Antibody mimetic drug conjugate manufactured by high-yield Escherichia coli expression and non-covalent binding system2022

    • Author(s)
      Yamatsugu Kenzo、Katoh Hiroto、Yamashita Takefumi、Takahashi Kazuki、Aki Sho、Tatsumi Toshifumi、Kaneko Yudai、Kawamura Takeshi、Miura Mai、Ishii Masazumi、Ohkubo Kei、Osawa Tsuyoshi、Kodama Tatsuhiko、Ishikawa Shumpei、Kanai Motomu、Sugiyama Akira
    • Journal Title

      Protein Expression and Purification

      Volume: 192 Pages: 106043-106043

    • DOI

      10.1016/j.pep.2021.106043

    • Related Report
      2022 Annual Research Report 2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Class II phosphatidylinositol 3-kinase-C2α is essential for Notch signaling by regulating the endocytosis of γ-secretase in endothelial cells2021

    • Author(s)
      Shimizu Shota、Yoshioka Kazuaki、Aki Sho、Takuwa Yoh
    • Journal Title

      Scientific Reports

      Volume: 11 Issue: 1 Pages: 5199-5199

    • DOI

      10.1038/s41598-021-84548-4

    • Related Report
      2021 Research-status Report 2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Class II phosphatidylinositol 3-kinase α and β isoforms are required for vascular smooth muscle Rho activation, contraction and blood pressure regulation in mice2020

    • Author(s)
      Islam Shahidul、Yoshioka Kazuaki、Aki Sho、Ishimaru Kazuhiro、Yamada Hiroki、Takuwa Noriko、Takuwa Yoh
    • Journal Title

      The Journal of Physiological Sciences

      Volume: 70 Issue: 1 Pages: 18-18

    • DOI

      10.1186/s12576-020-00745-2

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] TGFβ receptor endocytosis and Smad signaling require synaptojanin1?, PI3K-C2α?, and INPP4B?mediated phosphoinositide conversions2020

    • Author(s)
      Aki Sho、Yoshioka Kazuaki、Takuwa Noriko、Takuwa Yoh
    • Journal Title

      Molecular Biology of the Cell

      Volume: 31(5) Issue: 5 Pages: 360-372

    • DOI

      10.1091/mbc.e19-11-0662

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] PPIを介したミトコンドリアダイナミクス制御の新機構2022

    • Author(s)
      安藝 翔、大澤 毅
    • Organizer
      第8回がんと代謝研究会
    • Related Report
      2022 Annual Research Report
  • [Presentation] PPIを介したミトコンドリアダイナミクス制御の新機構2022

    • Author(s)
      安藝 翔、大澤 毅
    • Organizer
      第4回がんと代謝若手研究会
    • Related Report
      2022 Annual Research Report
  • [Presentation] PPIを介したミトコンドリアダイナミクス制御の新機構2022

    • Author(s)
      安藝 翔、大澤 毅
    • Organizer
      第81回日本癌学会学術総会
    • Related Report
      2022 Annual Research Report
  • [Presentation] PPIを介したミトコンドリアダイナミクス制御の新機構2022

    • Author(s)
      安藝 翔、大澤 毅
    • Organizer
      第95回日本生化学会大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] The mechanism of mitochondrial dynamics regulation via PPI2022

    • Author(s)
      Sho Aki、Tsuyoshi Osawa
    • Organizer
      第45回日本分子生物学会
    • Related Report
      2022 Annual Research Report
  • [Presentation] The mechanism of mitochondrial dynamics regulation via PPI2022

    • Author(s)
      Sho Aki、Tsuyoshi Osawa
    • Organizer
      12th AACR-JCA Joint Conference
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] PPIを介したミトコンドリアダイナミクス制御の新機構2022

    • Author(s)
      Sho Aki
    • Organizer
      第99回日本生理学会年会 (第12回 入澤宏・彩記念若手研究奨励賞日本生理学会奨励賞)
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] Sequential phosphoinositide conversion is required for TGFb-induced receptor endocytosis for angiogenesis.2021

    • Author(s)
      Sho Aki
    • Organizer
      第80回 日本癌学会学術総会
    • Related Report
      2021 Research-status Report
  • [Presentation] The mechanism of mitochondrial dynamics regulation via PPI2021

    • Author(s)
      Sho Aki
    • Organizer
      第44回 日本分子生物学会年会. (ワークショップ:生命科学の根幹に迫るミトコンドリアダイナミクスの世界)
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] 連続するホスホイノシタイド代謝がTGFβ受容体エンドサイトーシス及びSmad2/3 活性化に必須である2021

    • Author(s)
      安藝 翔
    • Organizer
      第98回日本生理学会大会
    • Related Report
      2020 Research-status Report
  • [Presentation] TGFβ/Smadシグナリングを制御するホスホイノシタイドカスケード2020

    • Author(s)
      安藝 翔
    • Organizer
      金沢大学「機能脂質シンポジウム」〝生命機能と疾患を制御する機能脂質〟
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] 血管新生因子TGFβ/Smadシグナリングを制御するホスホイノシタイドカスケード2020

    • Author(s)
      安藝 翔
    • Organizer
      第97回日本生理学会大会. (シンポジウム:Angiology evolving into new research fields)
    • Related Report
      2020 Research-status Report
    • Invited

URL: 

Published: 2020-04-28   Modified: 2024-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi