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Functional analysis of DNAM-1 in Treg and investigation for therapeutic applications

Research Project

Project/Area Number 16K20935
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Immunology
Gastroenterology
Research InstitutionUniversity of Tsukuba

Principal Investigator

Kanemaru Yumi  筑波大学, 医学医療系, 助教 (00708688)

Project Period (FY) 2016-04-01 – 2018-03-31
Project Status Completed (Fiscal Year 2017)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2017: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2016: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords制御性T細胞 / DNAM-1 / TIGIT / 炎症性腸疾患 / CD155 / 免疫学
Outline of Final Research Achievements

In this study, the role of DNAM-1 in regulatory T cell (Treg) was investigated. In vitro experiments showed that DNAM-1-deficient Treg function was normal. On the other hand, in vivo experiments showed that DNAM-1-deficient Treg function was enhanced. By reporter cell system, it was demonstrated that DNAM-1 interfered with the binding between TIGIT and its ligand and limited Treg function. Thus, it is strongly suggested that in vivo environment is involved in the molecular mechanisms of DNAM-1-TIGIT axis in Treg. This should be a pivotal mechanism how Treg cells efficiently work in vivo (inflammatory) situation.

Academic Significance and Societal Importance of the Research Achievements

過剰な免疫応答や炎症反応を抑制する細胞の1つである制御性T細胞は、自己免疫疾患や炎症性疾患の治療に有用であることが多くの研究から明らかになっている。制御性T細胞の機能を左右する因子の1つとして細胞表面に存在する受容体タンパク質が挙げられ、本研究で着目したDNAM-1もその1つである。本研究ではDNAM-1が制御性T細胞の機能を弱めてしまっていることを示した。このことは大きな学術的発見であると同時に、制御性T細胞を用いた治療においてDNAM-1を標的とする新たな治療法の可能性を示した点で社会的意義のある研究成果といえる。

Report

(3 results)
  • 2017 Annual Research Report   Final Research Report ( PDF )
  • 2016 Research-status Report
  • Research Products

    (5 results)

All 2018 2017 2016

All Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (3 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] TX99 Is a Neutralizing Monoclonal Antibody Against Mouse TIGIT2018

    • Author(s)
      Nakamura Yuho , Naito Keisuke , Yamashita-Kanemaru Yumi , Komori Daisuke , Hirochika Rei , Shibuya Akira , and Shibuya Kazuko
    • Journal Title

      Monoclonal Antibodies in Immunodiagnosis and Immunotherapy

      Volume: 印刷中 Issue: 2 Pages: 105-109

    • DOI

      10.1089/mab.2018.0001

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Physiological function of phospholipase D2 in anti-tumor immunity: regulation of CD8+ T lymphocyte proliferation2018

    • Author(s)
      Van Ngo Thai Bich, Tsunaki Hongu, Yuki Miura, Naohiro Katagiri, Norihiko Ohbayashi, Yumi Yamashita-Kanemaru, Akira Shibuya, Yuji Funakoshi, and Yasunori Kanaho
    • Journal Title

      Scientific Reports

      Volume: 印刷中

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Presentation] DNAM-1はヒト急性GVHD治療の分子標的となりうる2017

    • Author(s)
      金丸(山下)由美、佐藤 和貴、阿部 史枝、奥村 元紀、伊藤 守、渋谷 彰、渋谷 和子
    • Organizer
      第9回 血液疾患免疫療法学会 学術集会
    • Related Report
      2017 Annual Research Report
  • [Presentation] DNAM-1 limits Treg cell function via TIGIT-dependent manner2017

    • Author(s)
      Yumi Yamashita-Kanemaru, Kazuki Sato, Fumie Abe, Yuho Nakamura, Rikito Murata, Akira Shibuya, Kazuko Shibuya
    • Organizer
      第46回 日本免疫学会 学術集会
    • Related Report
      2017 Annual Research Report
  • [Presentation] CD155 (PVR/Necl5) mediates a costimulatory signal in CD4+ T cells and regulates allergic inflammation.2016

    • Author(s)
      Yamashita-Kanemaru Y, Bernhardt G, Shibuya A, Shibuya K.
    • Organizer
      16th International Congress of Immunology 2016
    • Place of Presentation
      Melbourne Convention and Ehibition Centre, Australia
    • Year and Date
      2016-08-21
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research

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Published: 2016-04-21   Modified: 2022-01-27  

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