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A novel approach to myocardial regeneration based on hypoxia-dependent, multi-hierarchical intrauterine environment.

Research Project

Project/Area Number 18K19943
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 90:Biomedical engineering and related fields
Research InstitutionKawasaki Medical School

Principal Investigator

Hashimoto Ken  川崎医科大学, 医学部, 准教授 (80341080)

Co-Investigator(Kenkyū-buntansha) 毛利 聡  川崎医科大学, 医学部, 教授 (00294413)
氏原 嘉洋  名古屋工業大学, 工学(系)研究科(研究院), 准教授 (80610021)
花島 章  川崎医科大学, 医学部, 講師 (70572981)
塚田 孝祐  慶應義塾大学, 理工学部(矢上), 教授 (00351883)
Project Period (FY) 2018-06-29 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
Fiscal Year 2020: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2019: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2018: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords心筋細胞 / 分裂・再生 / 酸素環境 / 栄養環境 / 3-メチルヒスチジン / 有袋類 / 胎盤 / 代謝栄養環境 / アミノ酸 / エネルギー代謝 / 再生 / 低酸素 / 胎内環境
Outline of Final Research Achievements

Fetal cardiomyocytes (CMs) actively proliferate under hypoxic intrauterine condition, but they stop dividing soon after birth due to an elevated oxygen tension by the onset of breathing. In this study, we focused on intrauterine metabolic/nutritional environments, and identified 3-methylhistidine playing a role in CM proliferation and regeneration. This uncommon amino acid is contained in a handful of muscle-specific proteins such as actin. Elucidating the molecular action of this amino acid will contribute to attain successful heart regeneration. The placenta is essential for the maintenance of the intrauterine environment. We used marsupial gray short-tailed opossum, which is most closely related to eutherians except that it lacks mature placenta. Our analysis revealed that adult opossums lost CM proliferative capacity as in eutherians. Examining the oxygen dynamics and CM proliferation around birth in opossums will contribute to clarify the evolutionary significance of the placenta.

Academic Significance and Societal Importance of the Research Achievements

心筋梗塞や心不全に対する根治療法は存在しない。これは出生後の肺呼吸開始による酸素の増加が引き金となって心筋細胞の分裂が停止するからである。一方、魚類や両生類の中には一生を通じて心筋分裂再生能を維持する種が存在する。本研究ではこれらの動物種間の比較から、アクチン等の特定の筋蛋白にのみ存在する3-メチルヒスチジンという特殊なアミノ酸が心筋分裂に関与する可能性を見出した。この知見を将来の心筋再生療法の開発に繋げたい。心筋分裂が活発な胎生期の特殊環境は胎盤により維持されている。本研究では成熟胎盤を欠くこと以外は我々有胎盤類に最も近い有袋類との比較を行うことで、進化学的観点から胎盤の存在意義を考察した。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (18 results)

All 2020 2019 2018 Other

All Int'l Joint Research (2 results) Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (10 results) (of which Int'l Joint Research: 1 results) Remarks (4 results)

  • [Int'l Joint Research] Stanford University, CA, USA(米国)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] Kings College, London(英国)

    • Related Report
      2018 Research-status Report
  • [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 Research-status 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 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Analysis of hypoxic in utero environments that maintain cardiomyocyte proliferation and its implications for regeneration in adults2020

    • Author(s)
      Ken Hashimoto
    • Organizer
      第97回日本生理学会大会
    • Related Report
      2020 Annual Research Report 2019 Research-status Report
  • [Presentation] Evolution of the coronary circulation hearts by shortening the elastic regions of connectin2020

    • Author(s)
      Akira Hanashima
    • Organizer
      第97回日本生理学会大会
    • Related Report
      2020 Annual Research Report 2019 Research-status Report
  • [Presentation] Comparison of passive mechanical properties of rat, chicken, frog and turtle ventricles2020

    • Author(s)
      Megumi Ito
    • Organizer
      第97回日本生理学会大会
    • Related Report
      2020 Annual Research Report 2019 Research-status Report
  • [Presentation] 軟骨魚類心臓コネクチンの構造2019

    • Author(s)
      花島 章
    • Organizer
      日本動物学会 第90回 大阪大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Original evolution of the muscle elastic protein connectin in Chondrichthyes2019

    • Author(s)
      花島 章
    • Organizer
      日本進化学会 第21回 札幌大会
    • Related Report
      2019 Research-status Report
  • [Presentation] 鳥類心臓の拡張機能の基礎的解析2019

    • Author(s)
      氏原 嘉洋
    • Organizer
      第58回日本生体医工学会大会
    • Related Report
      2019 Research-status Report
  • [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
    • Organizer
      第58回日本生体医工学会大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Nuclear connectin novex-3 is essential for proliferation of hypoxic fetal cardiomyocytes.2019

    • Author(s)
      Ken Hashimoto
    • Organizer
      9th FAOPS Congress (Federation of Asian and Oceanian Physiological Societies)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Connectin novex-3 enhances cardiomyocyte proliferation in hypoxic fetal environment.2018

    • Author(s)
      Ken Hashimoto
    • Organizer
      第57回日本生体医工学会
    • Related Report
      2018 Research-status Report
  • [Presentation] Multi-scale regulatory mechanism of cardiomyocyte proliferation/regeneration based on low oxygen environments.2018

    • Author(s)
      Ken Hashimoto
    • Organizer
      第95回日本生理学会大会
    • Related Report
      2018 Research-status Report
  • [Remarks] 川崎医科大学 生理学1教室 オリジナルホームページ

    • URL

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

    • Related Report
      2020 Annual Research Report
  • [Remarks] リサーチマップ:橋本 謙(代表者)

    • URL

      https://researchmap.jp/read0071085

    • Related Report
      2020 Annual Research Report
  • [Remarks] ORCiD:橋本 謙(代表者)

    • URL

      https://orcid.org/0000-0001-6194-9971

    • Related Report
      2020 Annual Research Report
  • [Remarks] 川崎医科大学 教員情報

    • URL

      https://kwweb-res.kawasaki-m.ac.jp/kwmhp/KgApp?section=13&kyoinId=ymdegoooggy

    • Related Report
      2019 Research-status Report 2018 Research-status Report

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Published: 2018-07-25   Modified: 2022-01-27  

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