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the better understanding of the mechanism of maternal immune tolerance induction by regulatory T cells, dendritic cells, and NK cells

Research Project

Project/Area Number 20K09614
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 56040:Obstetrics and gynecology-related
Research InstitutionUniversity of Toyama

Principal Investigator

Shima Tomoko  富山大学, 学術研究部医学系, 助教 (00377285)

Co-Investigator(Kenkyū-buntansha) 中島 彰俊  富山大学, 学術研究部医学系, 教授 (00436792)
戸村 道夫  大阪大谷大学, 薬学部, 教授 (30314321)
津田 さやか  富山大学, 学術研究部医学系, 助教 (60839075)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords母児免疫寛容 / 父親抗原特異的制御性T細胞 / 精漿 / 免疫寛容誘導性樹状細胞 / NK細胞
Outline of Research at the Start

母児免疫寛容は半異物である胎児を母体が許容し妊娠が維持成立するための重要な免疫学的システムであり、精漿プライミングや父親抗原特異的Treg細胞や樹状細胞やNK細胞の関与が重要と考えられている。本研究では、マウス妊娠におけるCD25+NK細胞の機能解析や父親抗原特異的Treg細胞および免疫寛容誘導性DC、CD25+NK細胞の特異的マーカーの検索を行い、精漿が着床不全改善の治療につながるか検討を行う。これら実験のデータをもとに、ヒト正常妊娠や流産においての父親抗原特異的Treg細胞および免疫寛容誘導性DC、CD25+NK細胞の役割を研究する。

Outline of Final Research Achievements

Regulatory T cells (Treg) play an important role in the establishment of maternal immune tolerance, in which the fetus, which is semiallograft (half of the babies express paternal antigens and becomes foreign substances), is not rejected by the maternal immune system and continues to maintain pregnancy. Paternal antigen-specific Tregs proliferate in the uterus, which is the mother-infant interface, after implantation, and are responsible for inducing paternal antigen-specific immune tolerance. In this study, we proved that paternal antigen-specific proliferating Tregs in the uterus are dominated by the thymus-derived Treg subset in early pregnancy and predominantly in the thymus periphery-induced Treg subset in late pregnancy.

Academic Significance and Societal Importance of the Research Achievements

本研究において妊娠時の制御性T細胞のサブセットを解析したことで、免疫寛容誘導に関与すると思われる樹状細胞やNK細胞など免疫細胞との相互作用を含めた母児免疫寛容を誘導するメカニズムの研究につながると考える。母児免疫寛容のメカニズムを解明することは原因不明着床不全や不育症といった正常な母児免疫寛容の破綻が原因の一因となっている疾患に対して、その原因、診断、ひいては新規治療法の提案までできる可能性がある。

Report

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

    (3 results)

All 2023 2021 2020

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

  • [Journal Article] Dynamics of neuropilin1 (Nrp1)-positive thymus-derived and Nrp1-negative peripherally induced paternal antigen specific regulatory T cells in the uterus and spleen during pregnancy in mice.2023

    • Author(s)
      Araishi K, Shima T, Yasuda I, Tsuda S, Morita K, Yamaki-Ushijima A, Nakashima A, Saito S
    • Journal Title

      J Reprod Immunol

      Volume: 155 Pages: 103792-103792

    • DOI

      10.1016/j.jri.2022.103792

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Uterine CD11c+ cells induce the development of paternal antigen-specific Tregs via seminal plasma priming2020

    • Author(s)
      Shima Tomoko、Nakashima Akitoshi、Yasuda Ippei、Ushijima Akemi、Inada Kumiko、Tsuda Sayaka、Yoshino Osamu、Tomura Michio、Saito Shigeru
    • Journal Title

      Journal of Reproductive Immunology

      Volume: - Pages: 103165-103165

    • DOI

      10.1016/j.jri.2020.103165

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] マウス異系妊娠において、末梢誘導性父親抗原特異的Treg細胞は母児境界面で増殖する2021

    • Author(s)
      荒石康平 島友子
    • Organizer
      第36回日本生殖免疫学会総会・学術講演会
    • Related Report
      2021 Research-status Report

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Published: 2020-04-28   Modified: 2024-01-30  

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