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The developmental and functional analysis of 2B4+ iNKT cells

Research Project

Project/Area Number 19K16687
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 49070:Immunology-related
Research InstitutionKyoto University

Principal Investigator

Cui Guangwei  京都大学, ウイルス・再生医科学研究所, 助教 (70791276)

Project Period (FY) 2019-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2019: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords免疫微小環境 / NKT細胞 / サイトカイン / IL-15 / インターロイキン15 / iNKT細胞
Outline of Research at the Start

iNKT細胞はインターロイキン15(IL-15)によって分化・維持・機能が制御され、がんや病原体に対する生体防御、慢性炎症や自己免疫疾患の発症などに関与している。これまでに胸腺内IL-15産生性免疫微小環境に強く依存するiNKT細胞を新たに同定した。しかし、このiNKT細胞の特徴および実態についてはまだ不明のままである。そこで本研究では、網羅的な遺伝子発現解析や組織特異的IL-15遺伝子破壊マウスなどを用い、このiNKT細胞の分化・維持の制御機構および生体内における機能を解析し、抗がん免疫や慢性炎症の病態にどのように関与するかを明らかにする。

Outline of Final Research Achievements

IL-15 is a cytokine important for development, homeostasis and response of the immune system. We crossed IL-15-flox mice with FoxN1-Cre mice to generate IL-15 conditional knock out (cKO) mice with specific deletion of IL-15 in thymic epithelial cells. We found that a novel subset of iNKT cells, highly expressing natural killer cell receptor CD244(2B4), was disappeared in FoxN1-Cre IL-15 cKO mice. Next, we demonstrated that the CD244+ iNKT (C2 iNKT) cells are circulating iNKT cell subset, and showed significantly higher expression of the genes related to cytotoxicity, compare to tissue-resident 2B4- iNKT (C2 iNKT) cells. Furthermore, the C2 iNKT cells contributes to anti-tumor ant anti-viral immunity in the lung.

Academic Significance and Societal Importance of the Research Achievements

本研究により、胸腺内IL-15産生性免疫微小環境に強く依存するCD244陽性C2 iNKT細胞を新たに同定した。C2 iNKT細胞は細胞障害活性が非常に高く、また、従来の組織常在型iNKT細胞ではなく、末梢循環型iNKT細胞であることを明らかにした。そのため、腫瘍の転移やウイルス感染などの病態における、IL-15産生性免疫微小環境と各iNKT細胞集団の役割に対する理解が進むと考えられる。よって、本研究で得られた知見は腫瘍の転移やウイルス感染に対するiNKT細胞とIL-15を標的とする治療薬や治療法の開発に貢献できる。

Report

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

    (5 results)

All 2020 2019

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

  • [Journal Article] IL-7R-Dependent Phosphatidylinositol 3-Kinase Competes with the STAT5 Signal to Modulate T Cell Development and Homeostasis.2020

    • Author(s)
      Cui G, Shimba A, Ma G, Takahara K, Tani-Ichi S, Zhu Y, Asahi T, Abe A, Miyachi H, Kitano S, Hara T, Yasunaga JI, Suwanai H, Yamada H, Matsuoka M, Ueki K, Yoshikai Y, Ikuta K.
    • Journal Title

      The Journal of Immunology

      Volume: 204 Issue: 4 Pages: 844-857

    • DOI

      10.4049/jimmunol.1900456

    • Related Report
      2020 Annual Research Report 2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Intestinal epithelial cell-derived IL-15 determines local maintenance and maturation of intra-epithelial lymphocytes in the intestine2019

    • Author(s)
      Zhu Yuanbo、Cui Guangwei、Miyauchi Eiji、Nakanishi Yuki、Mukohira Hisa、Shimba Akihiro、Abe Shinya、Tani-ichi Shizue、Hara Takahiro、Nakase Hiroshi、Chiba Tsutomu、Sehara-Fujisawa Atsuko、Seno Hiroshi、Ohno Hiroshi、Ikuta Koichi
    • Journal Title

      International Immunology

      Volume: 32 Issue: 5 Pages: 307-319

    • DOI

      10.1093/intimm/dxz082

    • NAID

      120006846480

    • Related Report
      2020 Annual Research Report 2019 Research-status Report
    • Peer Reviewed
  • [Presentation] Thymic IL-15 niche controls anti-tumor immunity by regulating a novel subset of invariant NKT cells2020

    • Author(s)
      Cui G and Ikuta K
    • Organizer
      第48回日本免疫学会学術集会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Thymic IL-15 niche controls anti-tumor immunity by regulating a novel subset of iNKT cells2019

    • Author(s)
      Cui Guangwei, Ikuta Koichi
    • Organizer
      第48回日本免疫学会総会・学術集会
    • Related Report
      2019 Research-status Report
  • [Presentation] NK細胞の分化を支持するIL-15産生性骨髄微小環境の解明2019

    • Author(s)
      阿部 真也、原 崇裕、崔 广為、生田 宏一
    • Organizer
      Kyoto T Cell Conference
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2022-01-27  

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