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Elucidation of mechanisms for maintaining automaticity by pacemaker cells

Research Project

Project/Area Number 21K08100
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 53020:Cardiology-related
Research InstitutionShinshu University

Principal Investigator

Kadota Shin  信州大学, 学術研究院医学系, 講師 (70799064)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2023: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
KeywordsHCN4 / 自動能 / 心筋細胞 / 成熟化 / ペースメーカー細胞 / 心筋成熟化 / 多能性幹細胞 / セルソーティング
Outline of Research at the Start

HCN4陽性ペースメーカー細胞とHCN4陽性非ペースメーカー細胞を細胞膜電位・細胞内Ca2+濃度変動波形から判別し、それぞれから局所的に微量RNAを採取してRNAシーケンス(RNA-seq)解析を行い、ペースメーカー細胞分化・自動能維持に関わる遺伝子群を特定する。その上で、特定された複数の遺伝子を標識するヒトiPS細胞株を樹立し、薬剤選択などによりペースメーカー細胞を純化する。さらに、純化ペースメーカー細胞のラット心臓への移植実験を行い、長期的なペーシング機能を評価する。

Outline of Final Research Achievements

We differentiated cardiomyocytes from human induced pluripotent stem cells labeled with the HCN4 gene expression and produced mature cardiomyocytes using prolonged culture and maturation-promoting factors. When compared to cardiomyocytes cultured for 40 days, the expression of HCN4 decreased with the addition of prolonged culture or maturation-promoting factors. While cells cultured long-term with the addition of maturation-promoting factors exhibited the highest level of maturity, the expression of HCN4 did not decrease compared to each factor alone, indicating no synergistic effect between maturation-promoting factors and prolonged culture. In another experiment, cardiomyocytes cultured for an extended period showed improved engraftment, maturation, and angiogenesis post-transplantation, suggesting a contribution of CRYAB gene expression to these improvements.

Academic Significance and Societal Importance of the Research Achievements

多能性幹細胞由来の心筋細胞の成熟過程においてHCN4発現の低下が認めたが、HCN4発現メカニズムの解明には更なる研究が必要である。一方で、成熟心筋細胞を移植した後に生着機能および血管新生能が増進することが示され、多能性幹細胞由来心筋細胞の再生医療応用における重要な進展となると考える。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (7 results)

All 2024 2023 2022 2021

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (5 results) (of which Invited: 4 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Mature human induced pluripotent stem cell-derived cardiomyocytes promote angiogenesis through alpha-B crystallin2023

    • Author(s)
      Tanaka Yuki、Kadota Shin、Zhao Jian、Kobayashi Hideki、Okano Satomi、Izumi Masaki、Honda Yusuke、Ichimura Hajime、Shiba Naoko、Uemura Takeshi、Wada Yuko、Chuma Shinichiro、Nakada Tsutomu、Tohyama Shugo、Fukuda Keiichi、Yamada Mitsuhiko、Seto Tatsuichiro、Kuwahara Koichiro、Shiba Yuji
    • Journal Title

      Stem Cell Research and Therapy

      Volume: 14 Issue: 1 Pages: 240-240

    • DOI

      10.1186/s13287-023-03468-4

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] 多能性幹細胞由来心筋細胞移植の現状と可能性2024

    • Author(s)
      門田 真、柴 祐司
    • Organizer
      第23回日本再生医療学会総会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 長期培養したヒト人工多能性幹細胞由来心筋細胞はCRYABを介して移植グラフトの血管新生を促進する2023

    • Author(s)
      田中夕祈、門田 真、柴 祐司
    • Organizer
      第31回日本血管生物医学会学術集会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 心筋成熟化の再生医療へのインパクト2023

    • Author(s)
      門田 真
    • Organizer
      第22回日本再生医療学会総会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] Cardiac regeneration research using iPS cell-derived cardiomyocytes2022

    • Author(s)
      門田真
    • Organizer
      第86回日本循環器学会学術集会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] 多能性幹細胞由来心筋細胞の成熟化について2021

    • Author(s)
      門田真
    • Organizer
      第50回日本心脈管作動物質学会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Patent(Industrial Property Rights)] 細胞又はその細胞の集団のレシピエントへの移植時期を決定する方法2021

    • Inventor(s)
      柴祐司、門田真
    • Industrial Property Rights Holder
      柴祐司、門田真
    • Industrial Property Rights Type
      特許
    • Filing Date
      2021
    • Related Report
      2021 Research-status Report

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

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