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Novel immunoradiation strategy based on autologous T cells derived exosome

Research Project

Project/Area Number 20K16825
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 52040:Radiological sciences-related
Research InstitutionKobe University

Principal Investigator

Hikaru Kubota  神戸大学, 医学部附属病院, 医員 (60824208)

Project Period (FY) 2020-04-01 – 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: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2020: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords放射線治療 / 免疫チェックポイント阻害剤 / 免疫放射線治療 / エクソソーム / 細胞障害性T細胞 / T細胞 / PD-L1 / 免疫チェックポイント分子 / 免疫放射線療法 / PD-1 / 自己血
Outline of Research at the Start

免疫放射線治療による抗腫瘍効果は臨床的にも認識され、さらなる発展が期待される。我々はT細胞由来エクソソームを用いて、免疫放射線治療の抗腫瘍効果を高めることが可能ではないかと考えた。T細胞膜上にはPD-1が発現し、放出されるエクソソーム膜には同様の分子が発現している。PD-1発現エクソソームが腫瘍のPD-L1に結合することにより、抗PD-L1抗体と同様の効果が期待できる。同エクソソームには複数の免疫チェックポイント分子が発現し、複数のシグナルを同時に阻害可能となる。自己血由来T細胞から放出されるエクソソームを用いた免疫チェックポイント阻害により、個別化された免疫放射線治療が可能となる。

Outline of Final Research Achievements

We have established a method for isolating exosomes in vivo. Next, CD8-positive T cells were isolated from the spleen of mice, and it was confirmed that the exosome marker CD9 was expressed in the culture supernatant. In addition, CD8-positive T cell-derived exosomes were extracted and confirmed that PD-1 was expressed. In terms of the affinity of PD-1 / PD-L, it was suggested that administration of PD-1 expressing autologous-exosomes may be more effective than conventional immune checkpoint inhibitors . Finally, it was confirmed that CD47 was expressed in exosomes derived from CD8-positive T cells. CD47 expression may avoid macrophage phagocytosisin vivo.

Academic Significance and Societal Importance of the Research Achievements

本研究の成果は自己血T細胞由来エクソソームを用いた新規免疫放射線治療戦略を前進させるものである。我々はCD8陽性T細胞から放出されるエクソソームを抽出し、その膜上にPD-1が発現している事を確認した。CD8陽性T細胞由来のエクソソーム膜解析の中で、CD47発現が確認された。CD47は所謂「don’t eat me signal」である。通常であればエクソソームは網内系で貪食されるが、それを回避することが可能であることを示唆している。自己血T細胞由来のエクソソームが免疫チェックポイント阻害剤を代替できることを示すことができれば、その社会的意義は計り知れない。

Report

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

    (7 results)

All 2022 2021 2020

All Journal Article (5 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 4 results,  Open Access: 5 results) Presentation (2 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Predicting factors of symptomatic radiation pneumonitis induced by durvalumab following concurrent chemoradiotherapy in locally advanced non-small cell lung cancer2022

    • Author(s)
      Mayahara Hiroshi、Uehara Kazuyuki、Harada Aya、Kitatani Keiji、Yabuuchi Tomonori、Miyazaki Shuichirou、Ishihara Takeaki、Kawaguchi Hiroki、Kubota Hikaru、Okada Hideaki、Ninomaru Taira、Shindo Chihiro、Hata Akito
    • Journal Title

      Radiation Oncology

      Volume: 17 Issue: 1

    • DOI

      10.1186/s13014-021-01979-z

    • Related Report
      2021 Annual Research Report
    • Open Access
  • [Journal Article] Risk factors for osteoradionecrosis of the jaw in patients with head and neck squamous cell carcinoma2021

    • Author(s)
      Kubota Hikaru、Miyawaki Daisuke、Mukumoto Naritoshi、Ishihara Takeaki、Matsumura Megumi、Hasegawa Takumi、Akashi Masaya、Kiyota Naomi、Shinomiya Hirotaka、Teshima Masanori、Nibu Ken-ichi、Sasaki Ryohei
    • Journal Title

      Radiation Oncology

      Volume: 16 Issue: 1 Pages: 1-1

    • DOI

      10.1186/s13014-020-01701-5

    • NAID

      120006954052

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Practice patterns for postoperative radiation therapy in patients with metastases to the long bones: a survey of the Japanese Radiation Oncology Study Group2021

    • Author(s)
      Kubota Hikaru、Nakamura Naoki、Shikama Naoto、Tonari Ayako、Wada Hitoshi、Harada Hideyuki、Nagakura Hisayasu、Heianna Joichi、Ito Kei、Nozaki Miwako、Tago Masao、Fushiki Masato、Uchida Nobue、Araki Norio、Sekii Shuhei、Kosugi Takashi、Takahashi Takeo、Kawamoto Terufumi、Saito Tetsuo、Yamada Kazunari
    • Journal Title

      Journal of Radiation Research

      Volume: 62 Issue: 2 Pages: 356

    • DOI

      10.1093/jrr/rraa133

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Palliative brachytherapy and external beam radiotherapy for dysphagia from esophageal cancer: A nationwide survey in Japan2021

    • Author(s)
      Kawamoto Terufumi、Nakamura Naoki、Saito Tetsuo、Tonari Ayako、Wada Hitoshi、Harada Hideyuki、Kubota Hikaru、Nagakura Hisayasu、Heianna Joichi、Miyazawa Kazunari、Yamada Kazunari、Tago Masao、Fushiki Masato、Nozaki Miwako、Uchida Nobue、Araki Norio、Sekii Shuhei、Kosugi Takashi、Takahashi Takeo、Shikama Naoto
    • Journal Title

      Japanese Journal of Clinical Oncology

      Volume: 51 Issue: 6 Pages: 950

    • DOI

      10.1093/jjco/hyab015

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Exosome-mediated radiosensitizing effect on neighboring cancer cells via increase in intracellular levels of reactive oxygen species2021

    • Author(s)
      Nakaoka Ai、Nakahana Makiko、Inubushi Sachiko、Akasaka Hiroaki、Salah Mohammed、Fujita Yoshiko、Kubota Hikaru、Hassan Mennaallah、Nishikawa Ryo、Mukumoto Naritoshi、Ishihara Takeaki、Miyawaki Daisuke、Sasayama Takashi、Sasaki Ryohei
    • Journal Title

      Oncology Reports

      Volume: 45 Issue: 4 Pages: 1-1

    • DOI

      10.3892/or.2021.7964

    • NAID

      120006975755

    • Related Report
      2021 Annual Research Report 2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Titanium Peroxide Nanoparticles with Radiation Covert Cold tumor into Hot tumor2021

    • Author(s)
      Hikaru Kubota*, Yoshiko Fujita*, Mohammed Salah*,Yasuyuki Shimizu*, Daisuke Miyawaki* and Ryohei Sasaki*
    • Organizer
      The 4 th International Cancer Research Symposium a Training for Oncology Professionals
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Titanium peroxide nanoparticle enhance the efficacy of immuno-radiotherapy via activated CD8+ T cell dependent antitumor effect in vivo2020

    • Author(s)
      Hikaru Kubota, Yoshiko Fujita, Mohammed Salah, Yasuyuki Shimizu, Hiroaki Akasaka, Ryohei Sasaki
    • Organizer
      American Society for Radiation Oncology 62nd Annual Meeting
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research

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Published: 2020-04-28   Modified: 2023-01-30  

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