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Tracheal regeneration using a combination of in-body tissue architecture and chondrocyte self-aggregation technology

Research Project

Project/Area Number 21H02987
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 55010:General surgery and pediatric surgery-related
Research InstitutionOsaka University

Principal Investigator

Okuyama Hiroomi  大阪大学, 大学院医学系研究科, 教授 (30252670)

Co-Investigator(Kenkyū-buntansha) 出口 幸一  大阪大学, 大学院医学系研究科, 助教 (00747082)
岩崎 駿  大阪大学, 大学院医学系研究科, 招へい教員 (40882254)
中山 泰秀  大分大学, 医学部, 客員研究員 (50250262)
岩井 良輔  岡山理科大学, フロンティア理工学研究所, 准教授 (60611481)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2024)
Budget Amount *help
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2023: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2022: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2021: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Keywords気管再生 / 組織工学 / 再生医療 / 大動物実験 / コラーゲン組織 / 生体内組織工学 / 細胞自己凝集化技術 / 軟骨培養 / 有茎移植 / 大動物 / 気管移植 / 軟骨再生 / 細胞外マトリックス / 気管狭窄症 / コラーゲンチューブ
Outline of Research at the Start

気管は未だ移植や再生技術は確立されていない。本研究では、我々がこれまでに開発した生体内組織工学で作成したコラーゲンチューブと独自の培養技術により作成した軟骨輪を組み合わせたhybrid-biotubeのスケールアップを行い、ビーグル犬の筋・大網内で数週間培養して粘膜・軟骨組織の再生と血管新生を評価する。次に血管茎をつけた筋・大網とともにhybrid-biotubeを同所性気管移植を行い、気管グラフトの長期開存性を評価する。本研究により大動物での気管再生技術が確立できれば、臨床応用へむけた大きなステップとなる。

Outline of Final Research Achievements

This study aimed to develop a novel treatment for severe pediatric airway disorders such as congenital tracheal stenosis by creating and transplanting a fully autologous regenerated trachea, termed the "Hybrid biotube." Cartilage rings were fabricated using chondrocytes cultured from the rabbit’s own costal cartilage and combined with collagen tissue by implanting them into the body with a specialized device. This in vivo approach resulted in a vascularized, structurally reinforced tracheal graft. Implantation in the neck musculature facilitated sufficient vascular formation, yielding a Hybrid biotube with both strength and flexibility. The graft was orthotopically transplanted into the cervical trachea, maintaining airway function postoperatively with no respiratory distress. Epithelial regeneration was also confirmed. As a tracheal reconstruction technique using only autologous tissue, this approach holds promise for future clinical application without risk of immune rejection.

Academic Significance and Societal Importance of the Research Achievements

本研究では、先天的な気管の病気で呼吸が困難な子どもたちのために、自分自身の細胞から新しい気管を作る技術を開発しました。動物実験では、移植した再生気管がしっかり機能し、呼吸を保てることを確認しました。この成果は、将来、人工物に頼らず拒絶反応の少ない気管の再生治療につながる可能性があり、重い呼吸障害のある患者さんの命を救う新たな医療の実現が期待されます。

Report

(4 results)
  • 2024 Final Research Report ( PDF )
  • 2023 Annual Research Report
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (6 results)

All 2024 2023 2022

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

  • [Journal Article] Regeneration Process of an Autologous Tissue-Engineered Trachea (aTET) in a Rat Patch Tracheoplasty Model2024

    • Author(s)
      Iwasaki Shun、Deguchi Koichi、Iwai Ryosuke、Nakayama Yasuhide、Okuyama Hiroomi
    • Journal Title

      Bioengineering

      Volume: 11 Issue: 3 Pages: 243-243

    • DOI

      10.3390/bioengineering11030243

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Successful tracheal regeneration using biofabricated autologous analogues without artificial supports2022

    • Author(s)
      Hiwatashi Shohei、Iwai Ryosuke、Nakayama Yasuhide、Moriwaki Takeshi、Okuyama Hiroomi
    • Journal Title

      Scientific Reports

      Volume: 12 Issue: 1

    • DOI

      10.1038/s41598-022-24798-y

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] 完全自己由来組織より構成される移植可能な再生気管組織の開発2024

    • Author(s)
      出口幸一
    • Organizer
      第124回日本外科学会学術集会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Preclinical development of scaffold-free tissue-engineered trachea using autologous cartilage cells.2023

    • Author(s)
      宇賀菜緒子
    • Organizer
      International Symposium of Pediatric Surgical Research 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Scaffold-free 軟骨リングで強化されたコラーゲンチューブによる気管再生技術~ ラットモデルにおける全周性気管置換~2022

    • Author(s)
      奥山宏臣
    • Organizer
      第122 回日本外科学会定期学術集会(ワークショップ)
    • Related Report
      2022 Annual Research Report
  • [Presentation] Successful tracheal regieneration by biofabricated autologous tracheal analog without artificial material supports2022

    • Author(s)
      Hiwatashi Shohei、Iwai Ryosuke、Nakayama Yasuhide、Moriwaki Takeshi、Okuyama Hiroomi
    • Organizer
      35th International Symposium on Pediatric Surgical Research (workshop)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research

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Published: 2021-04-28   Modified: 2026-01-16  

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