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Local oncolytic adenovirotherapy inducing the direct abscopal effect via exosome

Research Project

Project/Area Number 20K17617
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 55020:Digestive surgery-related
Research InstitutionOkayama University

Principal Investigator

Kakiuchi Yoshihiko  岡山大学, 大学病院, 医員 (70868356)

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: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2020: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords細胞外小胞 / ウイルス療法 / アブスコパル効果 / アデノウイルス / ドラッグデリバリーシステム / がん治療 / エクソソーム / 転移
Outline of Research at the Start

エクソソームは、細胞から分泌されるの小胞体で、細胞間情報伝達に重要な役割を担っているとされる。新規治療法であるアデノウイルスを用いたがんウイルス療法は、局所投与による強力な抗腫瘍効果と全身性の抗腫瘍免疫の増強が期待される治療法であるが、遠隔部腫瘍に対する直接的な効果に関しては不明な点が多い。本研究では、申請者らが臨床応用に向けて開発中の腫瘍選択的融解アデノウイルス製剤(テロメライシン)を用い、局所投与した腫瘍から分泌されるエクソソームが、遠隔部腫瘍へと到達した後に及ぼす治療効果に関して検討を行い、テロメライシンのエクソソームを介した遠隔部腫瘍に対する直接的な新規治療メカニズムの解明を目指す。

Outline of Final Research Achievements

Local administration of a telomerase specific oncolytic adenovirus, OBP-301, was sometimes occurred shrinkage of metastatic lymph nodes as well as directly-administered primary tumors. We used a bilateral subcutaneous tumor model in immunodeficient mice, and in immunocompetent mice. Local administration of OBP-301 on one side delivered their-derived substances to opposite side and produced potent therapeutic effects on untreated tumor as well, suggesting that immune modulation by viruses were involved in this abscopal effect. Interestingly, in the presence of an exosome production inhibitor, these phenomenon was not observed. These results suggested that involvement of exosome encapsulating adenoviruses were demonstrated. We conclude that OBP-301 local administration has remarkable and intriguing potential to cause the abscopal effect through exosome-mediated systemic delivery of OBP-301 in addition to immune activation.

Academic Significance and Societal Importance of the Research Achievements

本研究では、OBP-301のエクソソームを介した全身性の直接的な抗腫瘍効果メカニズムの解明した。OBP-301の投与は腫瘍への局所投与に限定されるため、遠隔転移部への治療効果は期待できないと考えられていたが、本研究での結果、エクソソームを介した直接的な全身性の治療効果は全く新しい治療メカニズムであり、本研究の成果はOBP-301のみならずウイルス療法全体の魅力をさらに高め、実臨床への応用へと役立つ研究結果であると言える。

Report

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

    (5 results)

All 2021 2020

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (4 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results)

  • [Journal Article] Local oncolytic adenovirotherapy produces an abscopal effect via tumor-derived extracellular vesicles2021

    • Author(s)
      Yoshihiko Kakiuchi, Shinji Kuroda, Nobuhiko Kanaya, Kento Kumon, Tomoko Tsumura, Masashi Hashimoto, Chiaki Yagi, Ryoma Sugimoto, Yuki Hamada, Satoru Kikuchi, Masahiko Nishizaki, Shunsuke Kagawa, Hiroshi Tazawa, Yasuo Urata, Toshiyoshi Fujiwara
    • Journal Title

      Molecular Therapy

      Volume: 29 Issue: 10 Pages: 2925-2930

    • DOI

      10.1016/j.ymthe.2021.05.015

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Extracellular vesicle-mediated distant signaling; Systemic adenovirotherapy via immune activation and cytotoxicity2021

    • Author(s)
      Yoshihiko Kakiuchi
    • Organizer
      The 80th Annual Meeting of the Japanese Cancer Association
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Local oncolytic adenovirotherapy produces an abscopal effect via tumor-derived extracellular vesicles2021

    • Author(s)
      Yoshihiko Kakiuchi
    • Organizer
      The 27th Annual Meeting of Japan Society of Gene and Cell Therapy
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 細胞外小胞がもたらす腫瘍融解アデノウイルス療法の全身性免疫賦活と局所細胞毒性2021

    • Author(s)
      垣内 慶彦
    • Organizer
      第37回 日本DDS学会学術集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Innovative exosome-based therapeutics; Local oncolytic adenovirotherapy inducing the abscopal effect via exosome2020

    • Author(s)
      垣内慶彦、黒田新士、金谷信彦、公文剣斗、津村朋子、橋本将志、八木千晶、杉本龍馬、菊地覚次、西﨑正彦、香川俊輔、浦田泰生、藤原俊義
    • Organizer
      第79回日本癌学会学術総会
    • Related Report
      2020 Research-status Report

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

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