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Adjuvant effect of NK cells for NKT cell-based immunotherapy targeting lung cancer

Research Project

Project/Area Number 20K07652
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 50020:Tumor diagnostics and therapeutics-related
Research InstitutionChiba University

Principal Investigator

Takami Mariko  千葉大学, 大学院医学研究院, 助教 (60770906)

Co-Investigator(Kenkyū-buntansha) 本橋 新一郎  千葉大学, 大学院医学研究院, 教授 (60345022)
木村 元子  千葉大学, 大学院医学研究院, 教授 (00345018)
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: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
KeywordsNKT細胞 / 免疫療法 / NK細胞 / アジュバント効果 / 肺癌
Outline of Research at the Start

本研究は、肺癌に対するNKT細胞を用いた免疫療法の有効性向上を目指し、新規併用免疫療法の開発を行うことを目的とする。NK細胞がNKT細胞に対してアジュバント効果を発揮し抗腫瘍効果を増強するという仮説に基づき以下を検討する。
①NK細胞がNKT細胞の抗腫瘍効果に与える影響及びそのメカニズム解析
②NKT細胞を用いたがん免疫療法におけるNK細胞のアジュバント効果の増強を目指した天然化合物の探索
③天然化合物を用いた新規併用免疫療法の有効性及びエビデンスの構築

Outline of Final Research Achievements

In this study, we tried to develop a new combination therapy to enhance the antitumor activity of NKT cell-based immunotherapy. We previously found that NK cells enhance the antitumor activity of NKT cells against the leukemic cell line, K562 cells. Therefore, we analyzed the mechanisms by which NK cells enhance the antitumor activity of NKT cells. We found that the anti-NKT-TCR antibody enhanced the antitumor activity of NKT cells against K562 cells, although we could not identify the soluble factor produced by NK cells. On the other hand, anti-NKT-TCR antibody treatment did not augment the antitumor activity of NKT cells against lung cancer cell line A549 cells. In the future, we plan to test if bispecific antibodies, which recognize lung cancer antigen and TCR of NKT cells, might enhance the antitumor activity of NKT cells against lung cancer.

Academic Significance and Societal Importance of the Research Achievements

本研究では、本来の目的であるNK細胞のNKT細胞に対するアジュバント効果を誘導する因子の特定には至らなかったものの、その実験過程で抗NKT-TCR抗体が白血病細胞株K562細胞に対して細胞傷害活性を惹起するのに必要な因子であることを特定し、新たな併用療法の可能性が示唆された。しかし、肺癌細胞株に対しては、抗NKT-TCR抗体を添加してもNKT細胞の抗腫瘍活性の増強は見られなかった。以上の結果からNKT細胞のTCRシグナルを活性化し、さらに腫瘍抗原を特異的に認識する二重特異性抗体を使用するなどにより、肺癌をターゲットとした新たなNKT細胞療法を開発できるのではないかと考察された。

Report

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

    (9 results)

All 2022 2021 2020

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 3 results) Presentation (5 results) (of which Int'l Joint Research: 1 results) Book (1 results)

  • [Journal Article] Administration of α-galactosylceramide-pulsed Antigen Presenting Cells in Combination with First-line Chemotherapy for Advanced Lung Cancer2021

    • Author(s)
      Hagiya, M., Tanaka, T., Aita, K., Shiragami, R., Ihara, F., Ishii, A., Takami, M., Homma, T., Wada, Y., Motohashi, S.
    • Journal Title

      Chiba Survey Research Journal

      Volume: 10 Pages: 27-33

    • NAID

      40022745808

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Activated invariant natural killer T cells directly recognize leukemia cells in a CD1d‐independent manner2020

    • Author(s)
      Aoki Takahiro、Takami Mariko、Takatani Tomozumi、Motoyoshi Kiwamu、Ishii Ayana、Hara Ayaka、Toyoda Takahide、Okada Reona、Hino Moeko、Koyama‐Nasu Ryo、Kiuchi Masahiro、Hirahara Kiyoshi、Kimura Motoko Y.、Nakayama Toshinori、Shimojo Naoki、Motohashi Shinichiro
    • Journal Title

      Cancer Science

      Volume: 111 Issue: 7 Pages: 2223-2233

    • DOI

      10.1111/cas.14428

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] CD1d expression in glioblastoma is a promising target for NKT cell-based cancer immunotherapy2020

    • Author(s)
      Hara Ayaka、Koyama-Nasu Ryo、Takami Mariko、Toyoda Takahide、Aoki Takahiro、Ihara Fumie、Kobayashi Masayoshi、Hirono Seiichiro、Matsutani Tomoo、Nakayama Toshinori、Iwadate Yasuo、Motohashi Shinichiro
    • Journal Title

      Cancer Immunology, Immunotherapy

      Volume: - Issue: 5 Pages: 1239-1254

    • DOI

      10.1007/s00262-020-02742-1

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Anti-NKT cell antibody treatment enhances anti-tumor activity of NKT cells toward CD1d (-) tumors in a CD32 dependent manner2022

    • Author(s)
      Takami, M., Motohashi, S.
    • Organizer
      EMBO workshop CD1/MR1-restricted T lymphocytes
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Anti-NKT cell antibody treatment enhances anti-tumor activity of NKT cells toward CD1d (-) tumors in a CD32 dependent manner2022

    • Author(s)
      Takami, M., Motohashi, S.
    • Organizer
      第51回日本免疫学会学術集会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Blockade of aryl hydrocarbon receptor (AhR) signaling enhances anti-tumor efficacy of iNKT cell-based immunotherapy2022

    • Author(s)
      Ishii, A., Takami, M., Motohashi, S.
    • Organizer
      第51回日本免疫学会学術集会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Blockade of AhR signaling enhances anti-tumor activity of NKT cells in vivo2021

    • Author(s)
      Takami, M., Ishii, A., Motohashi, S.
    • Organizer
      第25回日本がん免疫学会総会
    • Related Report
      2021 Research-status Report
  • [Presentation] Adjuvant effect of NK cells on the anti-tumor activity of NKT cells2020

    • Author(s)
      Takami, M., Ishii, A., Motohashi, S.
    • Organizer
      第24回日本がん免疫学会総会
    • Related Report
      2020 Research-status Report
  • [Book] がん免疫ペディア (吉村清 編集)2022

    • Author(s)
      髙見 真理子, 本橋 新一郎 (分担執筆:がんとNKT細胞)
    • Total Pages
      2
    • Publisher
      羊土社
    • ISBN
      9784758121194
    • Related Report
      2022 Annual Research Report

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

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