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The suppression of macrophage-mediated xenogeneic rejection by human TIGIT and PQA-18

Research Project

Project/Area Number 19K09092
Research Category

Grant-in-Aid for Scientific Research (C)

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

Principal Investigator

Maeda Akira  大阪大学, 医学系研究科, 招へい教員 (00319708)

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: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords異種移植 / マクロファージ / PQA-18 / TIGIT / 自然免疫 / MDSC / PAK2阻害剤
Outline of Research at the Start

ヒトTIGIT(T-cell immunoreceptor with Ig and ITIM domains)分子等をブタ細胞に発現させることにより異種拒絶反応を抑制しうるかを検討する。一方、新規免疫抑制剤、PQA-18は末梢血単球より強力な免疫抑制作用を持つmyeloid derived suppressor cell (MDSC)を誘導する。PQA-18誘導MDSCとヒトTIGITとの相補的、相加的マクロファージ抑制効果をin vitroおよびin vivoの系を用いて検討する。

Outline of Final Research Achievements

In this study, the suppressive effect of a novel immunosuppression, PQA-18, and human TIGIT on porcine cells was investigated. Both PQA-18 and human TIGIT on porcine cells significantly suppressed macrophage-mediated cytotoxicity. Furthermore,to study the mechanism of the suppression by TIGIT, the phosphorylation of SHP-1 was assessed using a western blotting analysis.Our study revealed that human TIGIT induced a significant phosphorylation of SHP-1 in macrophages.These findings indicate that PQA-18 and human TIGIT are effective measures against xenogeneic rejection.

Academic Significance and Societal Importance of the Research Achievements

ブタの臓器や細胞を用いた異種移植は今後移植におけるドナー不足を解決するために非常に重要な課題である。今回の研究でPQA-18という新たな免疫抑制剤とヒトTIGITの遺伝子導入が異種移植拒絶反応の抑制に有効であることが分かった。つまりヒトTIGIT分子を発現するブタを作り出すことが異種臓器・細胞の生着率の改善につながることを意味している。また従来の免疫抑制剤に加えてPQA-18を使用することによってブタ細胞および臓器の生着のさらなる改善が見込める。

Report

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

    (6 results)

All 2022 2020 2019

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 1 results) Presentation (2 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] The Innate Cellular Immune Response in Xenotransplantation2022

    • Author(s)
      Akira Maeda, et al.
    • Journal Title

      Frontiers in Immunology

      Volume: in press

    • DOI

      10.3389/fimmu.2022.858604

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The strategy for suppression of macrophage-mediated rejection in xenotransplantation.2020

    • Author(s)
      Akira Maeda, Hiroshi Eguchi, Kengo Nakahata, Takuji Kawamura, Kazuaki Yamanaka, Rei Matsuura, Rieko Sakai, Peichi Lo, Mayumi Asada, Hiroomi Okuyama, Shuji Miyagawa
    • Journal Title

      Transplantation

      Volume: 104 Issue: 4 Pages: 675-681

    • DOI

      10.1097/tp.0000000000003024

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] The novel immunosuppressant prenylated quinolinecarboxylic acid-18 (PQA-18) suppresses macrophage differentiation and cytotoxicity in xenotransplantation2019

    • Author(s)
      Lo Pei-Chi、Maeda Akira、Kodama Tasuku、Takakura Chihiro、Yoneyama Tomohisa、Sakai Rieko、Noguchi Yuki、Matsuura Rei、Eguchi Hiroshi、Matsunami Katsuyoshi、Okuyama Hiroomi、Miyagawa Shuji
    • Journal Title

      Immunobiology

      Volume: - Issue: 4 Pages: 575-584

    • DOI

      10.1016/j.imbio.2019.04.003

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Human TIGIT on porcine aortic endothelial cells suppresses xenogeneic macrophage-mediated cytotoxicity2019

    • Author(s)
      Noguchi Yuki、Maeda Akira、Lo Pei-Chi、Takakura Chihiro、Haneda Tomoko、Kodama Tasuku、Yoneyama Tomohisa、Toyama Chiyoshi、Tazuke Yuko、Okuyama Hiroomi、Miyagawa Shuji
    • Journal Title

      Immunobiology

      Volume: 224 Issue: 5 Pages: 605-613

    • DOI

      10.1016/j.imbio.2019.07.008

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] The novel immunosuppressant PQA- 18 suppresses macrophage differentiation cytotoxicity in xenotransplantation and2019

    • Author(s)
      Akira Maeda
    • Organizer
      15th congress of International Xenotransplantation Association
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Human tigit on swine endothelial cells suppresses xenogeneic macrophage-mediated cytotoxicity2019

    • Author(s)
      Akira Maeda
    • Organizer
      15th congress of International Xenotransplantation Association
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research

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Published: 2019-04-18   Modified: 2023-01-30  

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