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Interpretation of regulatory system of fetal cardiovascular development with re-evaluation of substance transport characteristics in fetal circulation

Research Project

Project/Area Number 20K20306
Project/Area Number (Other) 17H06272 (2017-2019)
Research Category

Grant-in-Aid for Challenging Research (Pioneering)

Allocation TypeMulti-year Fund (2020)
Single-year Grants (2017-2019)
Research Field Internal medicine of the bio-information integration and related fields
Research InstitutionKawasaki Medical School

Principal Investigator

Mohri Satoshi  川崎医科大学, 医学部, 教授 (00294413)

Co-Investigator(Kenkyū-buntansha) 塚田 孝祐  慶應義塾大学, 理工学部(矢上), 教授 (00351883)
花島 章  川崎医科大学, 医学部, 講師 (70572981)
橋本 謙  川崎医科大学, 医学部, 准教授 (80341080)
氏原 嘉洋  名古屋工業大学, 工学(系)研究科(研究院), 准教授 (80610021)
Project Period (FY) 2017-06-30 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥24,050,000 (Direct Cost: ¥18,500,000、Indirect Cost: ¥5,550,000)
Fiscal Year 2021: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2020: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2019: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2018: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2017: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Keywords胎児循環 / 低酸素 / アミノ酸 / 心筋細胞 / 細胞分裂 / 心筋肥大 / 不整脈 / 胎盤 / 細胞周期 / 心筋分裂 / 細胞分化 / 有袋類 / 分裂能 / 胎児ヘモグロビン / コネクチン / Novex-3 / 酸素環境 / 再生医療 / 栄養シグナル / 心筋細胞分裂制御 / 酸素分圧
Outline of Research at the Start

母親の胎内は生後に比べて非常に酸素濃度が低いが、母親と胎児をつなぐ胎児循環(胎盤や血液中で酸素を運ぶヘモグロビン分子)は効率的に酸素を運ぶためのシステムとして捉えられることが多い。しかし胎児のエネルギー消費は大きくなく、過剰な酸素は細胞分裂時に有害にさえなり得る。本研究では胎児循環を胎児細胞の為に最適な低酸素環境を維持し、体を構成するための基質(アミノ酸や脂肪酸)を選択的に運搬する循環システムであると捉え、研究対象として出生後すぐに細胞分裂を止める心筋細胞を扱う。何億年もかけ培ってきた細胞制御システムを分子・細胞・臓器レベルで解明することは、再生医療にも役立つ情報の取得に繋がると期待される。

Outline of Final Research Achievements

The body is composed of a variety of cells, but it is originally a single fertilized egg that repeatedly divides to acquire new functions. In this study, we analyzed the fetal circulation as an information system that controls fetal biological functions through unique transport characteristics of oxygen and amino acids. The analysis focused on the division and differentiation of cardiomyocytes. We identified Fam64a as a major factor, and investigated the mechanism by which cardiomyocytes, which actively divide during fetal life, lose their mitotic potential after birth, and its application to functional recovery during myocardial injury.

Academic Significance and Societal Importance of the Research Achievements

再生医療の実現を目指してiPS細胞など多能性を持つ細胞から様々な細胞への分化誘導の研究が精力的に進められている。出生直後に分裂能を失い心筋梗塞などの疾病後にも増殖しない心筋細胞は再生医療のニーズの高い有望なターゲットとして注目され、より高い分化・純度を求めて多くの誘導因子が報告されている。本研究では成体内での発達過程における環境として酸素およびアミノ酸濃度に着目して心筋細胞の分裂能制御メカニズムの解明に取り組んだ。出生に伴う酸素濃度変化による心筋細胞の分裂能喪失の分子メカニズムに迫ると共に、短時間の高濃度酸素曝露でも分裂能が低下することが明らかになり、効率的組織培養への知見を得ることが出来た。

Report

(6 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • Research Products

    (10 results)

All 2022 2019 2018 Other

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 3 results) Presentation (5 results) (of which Int'l Joint Research: 1 results) Remarks (2 results)

  • [Journal Article] Postnatal expression of cell cycle promoter Fam64a causes heart dysfunction by inhibiting cardiomyocyte differentiation through repression of Klf15.2022

    • Author(s)
      Hashimoto K, Kodama A, Ohira M, Kimoto M, Nakagawa R, Usui Y, Ujihara Y, Hanashima A, Mohri S
    • Journal Title

      iScience

      Volume: in press

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Nuclear connectin novex-3 promotes proliferation of hypoxic foetal cardiomyocytes.2018

    • Author(s)
      Hashimoto K, Kodama A, Sugino M, Yobimoto T, Honda T, Hanashima A, Ujihara Y, Mohri S.
    • Journal Title

      Sci Rep.

      Volume: 8(1) Issue: 1 Pages: 12337-12337

    • DOI

      10.1038/s41598-018-30886-9

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Turtle spongious ventricles exhibit more compliant diastolic propertyand possess larger elastic regions of connectin in comparison to ratcompact left ventricles2018

    • Author(s)
      Honda T, Ujihara Y, Hanashima A, Hashimoto K, Tanemoto K, and Mohri S.
    • Journal Title

      Kawasaki Medical Journal

      Volume: 44(1) Pages: 1-17

    • DOI

      10.11482/KMJ-E44(1)1

    • ISSN
      0385-0234, 2434-3404
    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] 進化とともに高弾性化する脊椎動物心臓:バネ分子コネクチンの一次構造決定による心室機械特性の検討2019

    • Author(s)
      花島章, 氏原嘉洋, 岩佐真衣, 児玉彩, 橋本謙, 毛利聡
    • Organizer
      第58回生体医工学会大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 鳥類心臓の拡張機能の基礎的解析2019

    • Author(s)
      氏原嘉洋, 花島章, 本田威, 児玉彩, 橋本謙, 毛利聡
    • Organizer
      第58回生体医工学会大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Connectin novex-3 enhances cardiomyocyte proliferation in hypoxic fetal environment.2019

    • Author(s)
      Ken Hashimoto, Aya Kodama, Miki Sugino, Tomoko Yobimoto, Takeshi Honda, Akira Hanashima, Yoshihiro Ujihara, Satoshi Mohri
    • Organizer
      第57回日本生体医工学会大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Nuclear connectin novex-3 is essential for proliferation of hypoxic fetal cardiomyocytes2018

    • Author(s)
      Ken Hashimoto, Aya Kodama, Miki Sugino, Tomoko Yobimoto, Takeshi Honda, Akira Hanashima, Yoshihiro Ujihara, Satoshi Mohri
    • Organizer
      9th FAOPS (Federation of the Asian and Oceanian Physiological Societies Congress)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 低酸素環境を起点とする多階層の心筋分裂・再生機構の解析2018

    • Author(s)
      橋本謙、児玉彩、呼元知子、杉野充希、花島章、氏原嘉洋、毛利聡
    • Organizer
      第95回日本生理学会大会
    • Related Report
      2017 Annual Research Report
  • [Remarks] 胎児循環による酸素・栄養環境と心臓形成制御

    • URL

      https://physiology1kawasak.wixsite.com/website-2/research2

    • Related Report
      2021 Annual Research Report
  • [Remarks] 川崎医科大学・生理学1 ホームページ

    • URL

      https://physiology1kawasak.wixsite.com/website-2

    • Related Report
      2020 Research-status Report

URL: 

Published: 2017-07-21   Modified: 2024-03-26  

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