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Fundamental research for creating specific therapy against right heart failure

Research Project

Project/Area Number 20K17167
Research Category

Grant-in-Aid for Early-Career Scientists

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

Principal Investigator

Ito Shogo  久留米大学, 医学部, 助教 (60647808)

Project Period (FY) 2020-04-01 – 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 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2020: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords右室不全 / 補体経路 / 右心不全 / 肺動脈結紮術 / マウス / C3a / 肺動脈結紮モデル / 分子標的療法 / 肺動脈結紮
Outline of Research at the Start

本研究は、右心不全に対する分子標的療法を創出することを目的とした研究である。なぜなら、右心不全に対する特効薬はなく、右心不全があることによって薬物治療の選択が難しくなるからである。右心不全だけを改善する治療ターゲットを探すため、網羅的遺伝子発現解析を行うと、右心室で補体副経路が活性化していることが分かった。補体副経路は自然免疫に重要なタンパクであるが、心臓での役割は分かっていない。補体副経路を阻害することでマウスの右心不全モデルで右室機能が悪化しなかったことから、補体副経路を阻害すれば右心不全を治療できるようになると考え、メカニズムの解明を行いたい。

Outline of Final Research Achievements

This study aims to create a molecular target therapy for right ventricular failure. This is because there is no specific therapy against right ventricular failure. To find a therapeutic target to improve only right heart failure, grobal gene expression analysis was performed and it was found that the alternative complement pathway is activated in the right ventricle. Next, when pulmonary artery constriction models were created in various knockout mice that inhibited the alternative complement pathway, accordingly right ventricular function was preserved, arrhythmogenicity was also suppressed. The research results have been published in Nature Communications 2023. In addition, we thought that the functional modification to immunocompetent cells would be underlying in this phenotype, therefore we focused on IL-17 and IL-22, which are secreted from Th17 cells whose functions are mainly modified by C3a, and are currently continuing analysis using knockout mice.

Academic Significance and Societal Importance of the Research Achievements

我々は、右心室の機能低下である“右室不全”の治療薬を創り出したいと思っています。なぜなら、左心機能に悪影響を与えない右室不全の特効薬は存在しないからです。我々はマウスの実験によって、補体副経路という免疫に関わるタンパク群を阻害することで、右室不全が改善することを発見しました。補体の阻害剤は既に他臓器の疾患に使用されており、それを右室不全へと応用できることを目標に、どのような機序を介して右室不全が改善したり悪くなったりするかについて更に研究を進めたいと考えています。

Report

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

    (8 results)

All 2023 2022 2020

All Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (6 results) (of which Int'l Joint Research: 3 results,  Invited: 1 results)

  • [Journal Article] The complement C3-complement factor D-C3a receptor signalling axis regulates cardiac remodelling in right ventricular failure2022

    • Author(s)
      Shogo Ito, Hisayuki Hashimoto, Yoshikazu Kishino,Yoshihiro Fukumoto, Keiichi Fukuda, Shinsuke Yuasa, et al.
    • Journal Title

      Nature Communication

      Volume: 13 Issue: 1 Pages: 5409-5409

    • DOI

      10.1038/s41467-022-33152-9

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] 右心不全に対する補体系の役割の解明2020

    • Author(s)
      伊藤章吾、福本義弘
    • Journal Title

      血管

      Volume: 43 Pages: 9-12

    • Related Report
      2020 Research-status Report
  • [Presentation] Development of molecular targeted therapy against right ventricular failure: involvement in complement C3- factor D- C3a pathway2023

    • Author(s)
      Shogo Ito, et al.
    • Organizer
      Basic cardiovascular science 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 補体C3-D因子-C3a受容体のシグナル経路は右室不全における心臓リモデリングを制御する2023

    • Author(s)
      伊藤章吾
    • Organizer
      第8回 日本肺高血圧・肺循環学会学術集会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 右心不全特異的な分子標的療法の創出に向けた基盤研究2022

    • Author(s)
      伊藤章吾
    • Organizer
      第51回日本心脈管作動物質学会学術集会
    • Related Report
      2022 Research-status Report
  • [Presentation] マウスを用いた補体副経路の制御による心室細動抑制効果の検討2022

    • Author(s)
      伊藤章吾
    • Organizer
      第266回日本循環器学会関東甲信越地方会
    • Related Report
      2022 Research-status Report
  • [Presentation] Development of molecular targeted therapy against right ventricular failure: involvement in a network of immunocompetent cells2020

    • Author(s)
      Shogo Ito, Shinsuke Yuasa, Jin Komuro, Toshiomi Katsuki, Mai Kimura, Dai Kusumoto, Hisayuki Hashimoto, Ryohei Majima, Keiichi Fukuda, Hiroki Aoki, Yoshihiro Fukumoto.
    • Organizer
      Basic Cardiovascular Science 2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Development of molecular targeted therapy against right ventricular failure: involvement in a network of immunocompetent cells2020

    • Author(s)
      Shogo Ito, Shinsuke Yuasa, Takahiro Nakamura, Yohei Akiba, Jin Komuro, Toshiomi Katsuki, Mai Kimura, Dai Kusumoto, Hisayuki Hashimoto, Keiichi Fukuda, Yoshihiro Fukumoto.
    • Organizer
      AHA Scientific Sessions 2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research

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Published: 2020-04-28   Modified: 2025-01-30  

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