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Cancer immunotherapy resistance focusing on tryptophan metabolism

Research Project

Project/Area Number 18K15272
Research Category

Grant-in-Aid for Early-Career Scientists

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

Principal Investigator

Ninomiya Soranobu  岐阜大学, 医学部附属病院, 招聘教員 (90444281)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Keywordsがん免疫 / 腫瘍微小環境 / 癌免疫療法 / トリプトファン代謝 / IDO / 癌免疫治療 / トリプトファン / Blinatumomab / 癌
Outline of Final Research Achievements

Blinatumomab, a bispecific antibody that targets both CD19, a surface antigen of B-cell tumors, and CD3, a surface antigen of T cells, has recently attracted attention as a novel cancer immunotherapy. In this study, (1) Analysis of the effects of tryptophan deficiency and kynurenine excess on Blinatumomab-bound T cells, (2) Examination of the antitumor effect of Blinatumomab on IDO-positive tumors, and (3) Elucidation of the effectiveness of Blinatumomab therapy combined with IDO inhibitors.

Academic Significance and Societal Importance of the Research Achievements

ブリナツモマブは新規抗体医薬品で、急性リンパ性白血病(ALL)に対して2017年にアメリカで承認されたました。Blinatumomabの臨床試験での奏効率は約50%であり、既存の治療法に比べてきわめて効果的ではあるが、一方で約半数の患者においては、効果が乏しいのが現状である。そのため、Blinatumomabの治療効果予測のバイオマーカーや、効果を高める治療法の開発が期待されてます。今回、我々はBlinatumomab療法の効果が抑制されている理由が、癌細胞中のIDOによってトリプトファンが代謝され、産生されたキヌレニンによるものであることを明らかにしました。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (1 results)

All 2020

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results)

  • [Journal Article] Low Levels of Serum Tryptophan Underlie Skeletal Muscle Atrophy.2020

    • Author(s)
      Ninomiya S, Nakamura N, Nakamura H, Mizutani T, Kaneda Y, Yamaguchi K, Matsumoto T, Kitagawa J, Kanemura N, Shiraki M, Hara T, Shimizu M, Tsurumi H.
    • Journal Title

      Nutrients

      Volume: 12 Issue: 4 Pages: 978-978

    • DOI

      10.3390/nu12040978

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access

URL: 

Published: 2018-04-23   Modified: 2022-01-27  

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