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Development of a novel bio-resorbable small diameter vascular graft in large animal models.

Research Project

Project/Area Number 19K09258
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 55030:Cardiovascular surgery-related
Research InstitutionAsahikawa Medical College

Principal Investigator

Kamiya Hiroyuki  旭川医科大学, 医学部, 教授 (30436836)

Co-Investigator(Kenkyū-buntansha) 小山 恭平  旭川医科大学, 医学部, 講師 (00818479)
若林 尚宏  旭川医科大学, 医学部, 助教 (20827745)
吉田 巧  富山県産業技術研究開発センター, その他部局等, 主任研究員 (80741751)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
KeywordsPolycaprolactone / 細径人工血管 / 3Dプリンター / 人工血管 / PLCグラフト
Outline of Research at the Start

本研究においては大動物モデルを用いて以下の3点を目標とする。1) 6㎜のPCLグラフトの長期開存性並びにPCLが吸収されていく過程の病理学的形態変化の解明、2) 理想的な内皮化を促すグラフトの作成条件の最適化、3) その結果を踏まえた3mmのPCLグラフトの短期開存性に関する検討

Outline of Final Research Achievements

To develop a small caliber vascular graft, we fabricated a polycaprolactone nanofiber vascular graft coated with hydrophilic polymer, polyvinyl alcohol (PVA-PCL graft), and performed a function test using animal models. Using a rat abdominal aorta replacement model, we demonstrated that PVA-PCL grafts were patent for a long term with neointima formation. To evaluate a feasibility of the graft usage, we established a pig coronary artery bypass graft (CABG) surgery model. With the pig CABG model, PVA-PCL grafts were occluded in 4 hours and did not show patency, suggesting that improvement of graft preparation to add stronger antithrombogenic property will be necessary. Our study highlighted the challenge to overcome and importance to use a clinically resembling CABG model.

Academic Significance and Societal Importance of the Research Achievements

本研究は、PCLナノファイバーをスキャフォールドとした小口径人工血管の実用可能性と今後克服すべき課題を明らかにした。また、ヒトに準じた大動物を使った手術モデルを利用することで、現在の主流である小動物モデルでは見えてこない問題を抽出することが可能になった。本研究は、小口径人工血管の作成を支える技術開発へつながると期待できる。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (5 results)

All 2022 2021

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

  • [Journal Article] Vascular Tissue Engineering: Polymers and Methodologies for Small Caliber Vascular Grafts2021

    • Author(s)
      Leal BBJ, Wakabayashi N, Oyama K, Kamiya H, Braghirolli DI, Pranke P.
    • Journal Title

      Frontiers in Cardiovascular Medicine

      Volume: 7 Pages: 1-18

    • DOI

      10.3389/fcvm.2020.592361

    • Related Report
      2021 Annual Research Report 2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Transapical thoracic endovascular aortic repair with a frozen elephant trunk for thoracic aortic aneurysm with shaggy aorta2021

    • Author(s)
      Wakabayashi Naohiro、Kikuchi Yuta、Shibagaki Keisuke、Kamiya Hiroyuki
    • Journal Title

      JTCVS Techniques

      Volume: 8 Pages: 33-36

    • DOI

      10.1016/j.xjtc.2021.03.030

    • Related Report
      2021 Annual Research Report
  • [Presentation] 糖尿病病態下における生体分解性小口径人工血管の機能評価2022

    • Author(s)
      菊池悠太、小山恭平、筒井真博、紙谷寛之
    • Organizer
      第34 回代用臓器・再生医学研究会総会
    • Related Report
      2021 Annual Research Report
  • [Presentation] ポリカプロラクタン製小口径代用血管の親水化加工2021

    • Author(s)
      若林尚宏、小山恭平、菊池悠太、紙谷寛之
    • Organizer
      第33回 代用臓器・再生医学研究会総会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 糖尿病ラットを用いた生体吸収性小口径人工血管の機能評価2021

    • Author(s)
      菊池悠太、筒井真博、若林尚宏、小山恭平、紙谷寛之
    • Organizer
      第74回 日本胸部外科学会 定期学術集会
    • Related Report
      2021 Annual Research Report

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Published: 2019-04-18   Modified: 2023-03-23  

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