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Development of a Novel Method for Inducing Operational Tolerance in Organ Transplantation

Research Project

Project/Area Number 22K16443
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 55010:General surgery and pediatric surgery-related
Research InstitutionOsaka University

Principal Investigator

Kazuki Sasaki  大阪大学, 大学院医学系研究科, 助教 (20745442)

Project Period (FY) 2022-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2023: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2022: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Keywords肝移植 / 間葉系幹細胞 / 制御性T細胞 / 免疫寛容 / HMGB1ペプチド
Outline of Research at the Start

近年、臓器移植術後の長期免疫抑制剤内服による有害事象を回避すべく、制御性T細胞(Treg)や骨髄由来間葉系幹細胞(MSC)等の輸注による免疫寛容誘導の臨床試験が世界的に行われている。しかし、それらの細胞はドナーより採取後、生体外で培養の上投与されているため、細胞培養に伴う労力やコスト、さらには微生物の混入や染色体不安定性など生物学的安全性についての懸念がある。ペプチドの中には、生体外の培養や輸注を必要とせず免疫調整作用を発揮するものが存在する可能性がある。本研究では、肝移植モデルで肝グラフトの生着期間の延長が得られるペプチドが存在するか検討する。

Outline of Final Research Achievements

The purpose of this research project was to investigate the therapeutic effects of HMGB1 peptide, which has proven efficacy in immunomodulation and tissue repair in inflammatory disease and cirrhosis models, in a model of acute rejection after liver transplantation. Within the study period, a rat liver transplantation model was established. Using this established rat liver transplant acute cellular rejection model, the usefulness of HMGB1 peptide was examined in terms of overall survival, biochemical data, and histology in comparison with the saline group, but no obvious anti-inflammatory or immunomodulating effects were observed in the HMGB1 peptide administration methods examined.

Academic Significance and Societal Importance of the Research Achievements

当初、移植医療において問題となっている免疫抑制剤長期内服の有害事象を避けるべく、新規治療法開発を目標として研究に取り組んだ。骨髄中より間葉系幹細胞を炎症部位に遊走させ抗炎症作用や免疫調整能を発揮するというこのユニークなHMBG1ペプチドは本研究で検討したラット肝移植急性細胞性拒絶モデルにおいては明らかではなかったが、様々な疾患モデルでその有用性が示されており、今後の臨床現場での応用が期待される。

Report

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

    (6 results)

All 2024 2023 2022

All Journal Article (3 results) (of which Peer Reviewed: 3 results) Presentation (3 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] Multiple infusions of ex vivo-expanded regulatory T cells promote CD163+ myeloid cells and kidney allograft survival in non-lymphodepleted non-human primates2024

    • Author(s)
      Sasaki Kazuki、Kubo Masahiko、Wang Yu-chao、Lu Lien、Vujevich Veronica、Wood-Trageser Michelle A.、Golnoski Kayla、Lesniak Andrew、Gunabushanam Vikraman、Ganoza Armando、Wijkstrom Martin J.、Humar Abhinav、Demetris Anthony J.、Thomson Angus W.、Ezzelarab Mohamed B.
    • Journal Title

      Kidney International

      Volume: 105 Issue: 1 Pages: 84-98

    • DOI

      10.1016/j.kint.2023.09.021

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Successful endovascular embolization of the common hepatic artery for pseudoaneurysm associated with pancreatic fistula after liver transplantation: a case report2023

    • Author(s)
      Sasaki Kazuki、Asaoka Tadafumi、Kobayashi Shogo、Iwagami Yoshifumi、Yamada Daisaku、Tomimaru Yoshito、Noda Takehiro、Wada Hiroshi、Gotoh Kunihito、Takahashi Hidenori、Maeda Noboru、Kimura Yasushi、Ono Yusuke、Doki Yuichiro、Eguchi Hidetoshi
    • Journal Title

      Surgical Case Reports

      Volume: 9 Issue: 1 Pages: 143-143

    • DOI

      10.1186/s40792-023-01723-7

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Rituximab administration one week before ABO-incompatible liver transplantation due to drug-induced acute liver failure with hepatic coma: a case report2023

    • Author(s)
      Sasaki Kazuki、Kobayashi Shogo、Iwagami Yoshifumi、Yamada Daisaku、Tomimaru Yoshito、Noda Takehiro、Takahashi Hidenori、Doki Yuichiro、Eguchi Hidetoshi
    • Journal Title

      Clinical Journal of Gastroenterology

      Volume: 16 Issue: 5 Pages: 709-714

    • DOI

      10.1007/s12328-023-01827-5

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Presentation] Minimally invasive surgery for living liver donor Hybrid technique and full-laparoscopic surgery2022

    • Author(s)
      Kobayashi S, Noda T, Tomimaru Y, Sasaki K, Iwagami Y, Yamada D, Takahashi H, Ueno T, Doki Y, Eguchi H
    • Organizer
      Transplantation Science Symposium Asian Regional Meeting 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Acute liver failure with hepatic coma saved by ABO-incompatible liver transplantation: A case report2022

    • Author(s)
      Sasaki K., Kobayashi S., Iwagami Y., Yamada D., Tomimaru Y., Noda T., Takahashi H., Doki Y., Eguchi H.
    • Organizer
      Transplantation Science Symposium Asian Regional Meeting 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Pure Laparoscopic Donor Hepatectomy Reduces Postoperative Analgesic Use and Pain Scale2022

    • Author(s)
      Sato H., Sasaki K., Iwagami Y., Yamada D., Tomimaru Y., Noda T., Takahashi H., Kobayashi S., Doki Y., Eguchi H.
    • Organizer
      Transplantation Science Symposium Asian Regional Meeting 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research

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Published: 2022-04-19   Modified: 2025-01-30  

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