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Extend islet graft survival in pancreatic islet transplantation by applying the immunoregulatory mechanism of ceramide

Research Project

Project/Area Number 20K21628
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 55:Surgery of the organs maintaining homeostasis and related fields
Research InstitutionNiigata University

Principal Investigator

Kobayashi Takashi  新潟大学, 医歯学系, 准教授 (40464010)

Co-Investigator(Kenkyū-buntansha) 木下 義晶  新潟大学, 医歯学系, 教授 (80345529)
松田 康伸  新潟大学, 医歯学系, 准教授 (40334669)
永橋 昌幸  新潟大学, 医歯学総合病院, 研究准教授 (30743918)
三浦 宏平  新潟大学, 医歯学系, 客員研究員 (70733658)
廣瀬 雄己  新潟大学, 医歯学総合病院, 特任助教 (10737365)
油座 築  新潟大学, 医歯学総合病院, レジデント (00745565)
諸 和樹  新潟大学, 医歯学総合病院, 助教 (10745566)
Project Period (FY) 2020-07-30 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2022: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2021: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2020: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords細胞移植 / 臓器移植 / 移植免疫 / 糖尿病 / 脂質メディエーター / 膵島移植 / セラミド
Outline of Research at the Start

脂肪の一種であるセラミドが免疫抑制機能に重要な働きをしているという知見をふまえ、このセラミドの作用を細胞移植に応用できるかどうかを明らかにする研究である。具体的には、1型糖尿病に対する細胞移植治療である膵島細胞移植において、セラミドの制御性T細胞の活性化による生着延長効果を明らかにすることを目的としている。セラミドは生体内に元々ある脂質であるため安全性に問題はなく、臨床研究への発展が期待できる。

Outline of Final Research Achievements

Insulin independence after pancreatic islet transplant for diabetes mellitus is mainly limited by early immunological reaction, such as instant blood-mediated inflammatory reaction (IBMIR). It induces a high rate of post-procedure beta cell apoptosis and leads to islet graft loss. Ceramide is a lipid mediator and acts as a signal transmitter. Ceramide is also reported to activate regulatory T cell and modulate local immunity to prevent excessive immune reactions. The purpose of this study is to clarify whether ceramide may improve the function of pancreatic islet grafts. The results of this study suggest that administration of ceramide induced regulatory T cells and contributed to functional improvement of pancreatic islet grafts.

Academic Significance and Societal Importance of the Research Achievements

糖尿病治療としての膵島細胞移植は、膵島自体を移植するため根本的な治療であること、点滴で移植が可能なため低侵襲であることが大きな利点であるが、移植直後に免疫学的な膵島破壊により80%の膵島が喪失するため、最低でも2~3人分の膵島量が必要であることがドナー不足の日本では問題であった。これまで新規免疫抑制剤の導入、免疫隔離膜を用いた皮下埋め込み型デバイスの開発、異種ドナー(ブタ)や、iPS細胞由来膵島の使用などが試みられているが、生着不足やウイルス感染、癌化のリスクなどの問題を抱えている。セラミドは生体内に元々存在する脂質であるため臨床応用を考えると安全性に問題なく臨床研究へ発展させやすい。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (4 results)

All 2022 2021 2020

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

  • [Journal Article] Inguinal Herniation After Living Donor Kidney Transplantation: A Case Report.2020

    • Author(s)
      Kobayashi T, Miura K, Saito K, Tasaki M, Saito K, Sakata J, Takizawa K, Katada T, Hirose Y, Yuza K, Ando T, Nagahashi M, Kameyama H, Wakai T.
    • Journal Title

      Transplant Proc

      Volume: 52 Issue: 6 Pages: 1940-1943

    • DOI

      10.1016/j.transproceed.2020.02.131

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Living donor liver transplantation for more than 30-year survived patients with native liver after Kasai operation for biliary atresia2020

    • Author(s)
      Kobayashi T, Miura K, Kubota M, Kinoshita Y, Sakata J, Takizawa K, Katada T, Hirose Y, Yuza K, Ando T, Miura Y, Nagahashi M, Kameyama H, Wakai T
    • Journal Title

      Transplantation Reports

      Volume: 5 Pages: 100052-100052

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] IMPROVING ENDOCRINE FUNCTION OF TRANSPLANTED ISLETS BY CERAMIDE IN RAT ISLET AUTOTRANSPLANT MODEL2022

    • Author(s)
      Takashi Kobayashi, Yoshiaki Kinoshita, Yoshiaki Takahashi, Toshiyuki Ohyama, Yuhki Arai, Yu Sugai, Yu Hamasaki, Kohei Miura, Hirosuke Ishikawa, Kazuki Moro, Jun Sakata, Toshifumi Wakai
    • Organizer
      35th the International Symposium on Paediatric Surgical Research
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Effect of exenatide on swine islet autotransplantation model2021

    • Author(s)
      Kobayashi T, Miura K, Ishikawa H, Toge K, Hirose Y, Takizawa K, Sakata J, Wakai T, Kinoshita Y
    • Organizer
      The 17th Congress of the Asian Society of Transplantation
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research

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Published: 2020-08-03   Modified: 2024-01-30  

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