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Oncolytic virus-mediated p53 overexpression promotes systemic antitumor immune response in osteosarcoma

Research Project

Project/Area Number 19K23888
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0901:Oncology and related fields
Research InstitutionOkayama University

Principal Investigator

Kondo Hiroya  岡山大学, 大学病院, 医員 (40846911)

Project Period (FY) 2019-08-30 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords腫瘍融解ウイルス療法 / p53 / 骨肉腫 / 免疫原性細胞死 / 腫瘍融解アデノウイルス / CD8陽性細胞 / DAMPs / 免疫療法 / 骨軟部肉腫 / 腫瘍融解ウイルス / 腫瘍免疫療法 / アブスコパル効果
Outline of Research at the Start

悪性骨軟部肉腫は化学療法に抵抗性を示すものがあり予後不良の転帰をたどる症例も多い。近年骨軟部肉腫に対する免疫療法の検討が始まっており免疫応答効果をいかに増強するかが重要な治療戦略となる。申請者らは腫瘍融解ウイルスOBP-301、OBP-301にがん抑制遺伝子p53を導入したOBP-702を開発し骨肉腫に対して抗腫瘍効果を示すことを明らかにした。腫瘍融解ウイルス療法は免疫原性細胞死を誘導する報告があり我々のOBP-301、OBP-702も骨軟部肉腫へ誘導効果を示すことが期待できる。本研究では臨床応用へむけて腫瘍融解ウイルスによる免疫原性細胞死の誘導効果の確認とそのメカニズムについて解明を行う。

Outline of Final Research Achievements

Although p53 itself was involved in immunogenic cell death, OBP-702 actually showed tumor immune activity against a vivo model. In addition, the abscopal effect on distant tumors was demonstrated, and it is expected to be applied to the simultaneous treatment of primary and distant tumors with tumor-dissolving viral agents, which have been used only for local treatment. In addition, the antitumor effect is expected to be mediated by activation of the immune response throughout the body, which may lead to potential applications such as combination therapy with immune chuck point inhibitors such as anti-PD-1. The results of this study are very significant, as they leave open the possibility of therapeutic applications and the expansion of research themes.

Academic Significance and Societal Importance of the Research Achievements

骨軟部肉腫は系統的化学療法の導入によりその予後は改善してきたが、化学・放射線療法抵抗例や転移例など、予後不良例も多い。そのため、骨軟部肉腫に対する新規治療法の開発が重要な課題である。近年、抗PD-1抗体等、腫瘍免疫療法に対する研究が盛んに行われており、骨軟部肉腫治療の発展の為にも腫瘍免疫療法は非常に重要である。骨肉腫においては免疫細胞の乏しいcold tumorが主体と考えられてきたが、腫瘍融解アデノウイルス製剤投与におけるcold tumorからhot tumorへの転換することができるのであればますます治療応用の可能性が高まる。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (4 results)

All 2021 2020 2019

All Presentation (4 results)

  • [Presentation] Oncolytic virus-mediated p53 overexpression promotes systemic antitumor immune response in osteosarcoma2021

    • Author(s)
      近藤宏也、田澤大、出宮光二、久禮美穂、望月雄介、長谷井嬢、國定俊之、浦田泰生、尾崎敏文
    • Organizer
      第79回癌学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] p53-armed oncolytic virotherapy enhances the antitumor efficacy both for local and distant site in osteosarcoma2020

    • Author(s)
      Hiroya Kondo
    • Organizer
      the 79th Annual Meeting of the Japanese Cancer Association
    • Related Report
      2020 Research-status Report
  • [Presentation] p53-armed oncolytic virotherapy enhances the antitumor efficacy both for local and distant site in osteosarcoma2020

    • Author(s)
      Koji Demiya
    • Organizer
      2020 Annual Meeting of the Orthopaedic Research Society
    • Related Report
      2019 Research-status Report
  • [Presentation] Combination immunotherapy with telomerase-specific oncolytic adenovirus for osteosarcoma2019

    • Author(s)
      Koji Demiya
    • Organizer
      the 78th Annual Meeting of the Japanese Cancer Association
    • Related Report
      2019 Research-status Report

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Published: 2019-09-03   Modified: 2023-01-30  

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