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Development of new surgical materials preventing tissue damages caused by pancreatic juice leakage

Research Project

Project/Area Number 21K08681
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 55020:Digestive surgery-related
Research InstitutionOsaka Metropolitan University (2022-2023)
The University of Tokyo (2021)

Principal Investigator

Ishizawa Takeaki  大阪公立大学, 大学院医学研究科, 教授 (10422312)

Co-Investigator(Kenkyū-buntansha) 伊藤 大知  東京大学, 大学院医学系研究科(医学部), 教授 (50447421)
長谷川 潔  東京大学, 医学部附属病院, 教授 (20292906)
長田 梨比人  埼玉医科大学, 医学部附属病院, 助教 (00815706)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2023: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords膵液漏 / 消化酵素 / 手術合併症 / 膵切除 / 医療材料 / 術中蛍光イメージング / 膵癌 / 蛍光イメージング / 膵液瘻 / 合併症 / 膵液
Outline of Research at the Start

申請者は、膵液漏を①「見る」、②「防ぐ」、および膵液漏から③「守る」技術により、膵液漏の発生率低減と重症合併症への進展を回避する方策を構想してきた。本研究では、上記②、③を実現する技術の開発に取り組む。具体的には、プロテアーゼ阻害剤とアルカリ性中和剤の徐放材として機能するナノ粒子をハイドロゲルに封入し、膵液活性の緩衝作用を持つ組織癒着材を開発する。

Outline of Final Research Achievements

First, fluid samples obtained from patients after pancreatic resections were applied to the swine carotid artery. As a result, highest histological damages on the arterial wall were observed when patients' pancreatic juice was applied with intestinal fluid. Second, digestive enzyme solutions were applied onto the carotid artery. Then, trypsin and chymotrypsin were associated with thinning of the media, and trypsin and elastase affected on nuclear degeneration. Finally, mixture of patients' pancreatic juice and intestinal fluid was applied to the carotid artery after adding trypsin inhibitor, leading to prevention of tissue damages. In subsequent studies, we will create high polymer compound enabling sustained release of trypsin inhibitor to be placed on the vessel surfaces during pancreatic surgery.

Academic Significance and Societal Importance of the Research Achievements

手術後に膵液漏が起きると、組織障害により血管が破綻し致死的な出血が起こる。本研究は、膵液が腸液と混合して活性化したtrypsinが、動脈の中膜を菲薄化させ、平滑筋の核を変性させるというメカニズムを解明した。Trypsinの阻害剤を添加すると血管障害が回避されるため、阻害剤を徐放する医療材料で手術中に血管壁を被覆すれば、膵液漏に伴う出血を予防でき、手術の安全性が大幅に向上する可能性がある。

Report

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

    (12 results)

All 2024 2023 2022 2021 Other

All Int'l Joint Research (1 results) Journal Article (3 results) (of which Peer Reviewed: 2 results) Presentation (6 results) (of which Int'l Joint Research: 5 results,  Invited: 5 results) Book (1 results) Remarks (1 results)

  • [Int'l Joint Research] Clinical Robotic Surgery Association(米国)

    • Related Report
      2023 Annual Research Report
  • [Journal Article] Pancreaticoduodenectomy with celiac artery resection (PD-CAR) for unresctable locally advanced pancreatic ductal adenocarcinoma2023

    • Author(s)
      Kimura Kenjiro、Amano Ryosuke、Tauchi Jun、Nishio Kohei、Ohira Go、Shinkawa Hiroji、Tanaka Shogo、Yamamoto Akira、Motomura Hisashi、Ishizawa Takeaki
    • Journal Title

      Langenbeck's Archives of Surgery

      Volume: 408 Issue: 1 Pages: 174-174

    • DOI

      10.1007/s00423-023-02860-1

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Real-Time Fluorescence Imaging to Identify Cholangiocarcinoma in the Extrahepatic Biliary Tree Using an Enzyme-Activatable Probe.2023

    • Author(s)
      Takahashi R, Ishizawa T, Inagaki Y, Tanaka M, Ogasawara A, Kuriki Y, Fujita K, Kamiya M, Ushiku T, Urano Y, Hasegawa K.
    • Journal Title

      Liver Cancer.

      Volume: 12 Issue: 6 Pages: 590-602

    • DOI

      10.1159/000530645

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Closure and anastomosis of the pancreas using a four-needle three-loop suture device2022

    • Author(s)
      Ishizawa Takeaki、Akamatsu Nobuhisa、Kaneko Junichi、Arita Junichi、Hasegawa Kiyoshi
    • Journal Title

      Global Health & Medicine

      Volume: 4 Issue: 4 Pages: 225-229

    • DOI

      10.35772/ghm.2022.01044

    • ISSN
      2434-9186, 2434-9194
    • Year and Date
      2022-08-31
    • Related Report
      2022 Research-status Report
  • [Presentation] Widening Applications of Enzyme Activatable Fluorophores2024

    • Author(s)
      Takeaki Ishizawa
    • Organizer
      21st Surgery of the Foregut Symposium
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Clinical applications of intraoperative fluorescence imaging in HBP surgery2023

    • Author(s)
      Takeaki Ishizawa
    • Organizer
      the 34th Annual International Society for Medical Innovation and Technology Conference
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] ICG / Newer imaging systems in GI surgery2023

    • Author(s)
      Takeaki Ishizawa
    • Organizer
      The 33rd National Conference of the Indian Association of Surgical Gastroenterology
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Expanding application of intraoperative fluorescence imaging in Asia-Pacific regions2023

    • Author(s)
      Ishizawa T
    • Organizer
      Seoul International Symposium of Surgical Oncology 2023
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Clinical applications of intraoperative fluorescence imaging to hepatobiliary and pancreatic surgery2022

    • Author(s)
      Kimura K, Ishizawa T
    • Organizer
      12TH AACR-JCA JOINT CONFERENCE
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 蛍光イメージングを軸とした手術用ディバイスの開発2021

    • Author(s)
      石沢武彰, 長谷川潔
    • Organizer
      第59回 日本癌治療学会学術集会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Book] Fluorescence-Guided Surgery: From Lab to Operation Room2023

    • Author(s)
      Takeaki Ishizawa
    • Total Pages
      263
    • Publisher
      Springer
    • ISBN
      9789811973710
    • Related Report
      2023 Annual Research Report
  • [Remarks] PANFRAIL (Pancreatic Resections in Frail Patients)

    • URL

      https://clinicalrobotics.com/panfrail-pancreatic-resections-in-frail-patients-which/

    • Related Report
      2023 Annual Research Report

URL: 

Published: 2021-04-28   Modified: 2025-01-30  

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