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Rapid design and preparation of artificial antibodies to inhibit immune checkpoints

Research Project

Project/Area Number 20K06516
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 43020:Structural biochemistry-related
Research InstitutionInstitute of Physical and Chemical Research

Principal Investigator

Miyatake Hideyuki  国立研究開発法人理化学研究所, 開拓研究本部, 専任研究員 (50291935)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2021: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2020: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords免疫チェックポイント / PD-1/PD-L1 / 人工抗体タンパク質 / 低分子阻害剤 / in-silicoスクリーニング / 抗がん剤 / 免疫チェックポイント阻害剤 / mTOR / キナーゼ阻害剤 / ラパマイシン / 低分子化合物 / in silico/in cell選択法 / 非IgG抗体 / オプジーボ / mTORC1 / in-silico創薬 / 細胞内ルシフェラーぜアッセイ / in silico/in cell選択 / コンピュータ創薬 / PD1/PD-L1 / Rheb / in-silico変異実験 / in-cell分子相互作用アッセイ / オプジーボ (Nivolumab) / 非IgG人工抗体 / タンパク質工学 / 結晶構造 / T細胞再活性化活性 / 人工抗体 / in silico/ in vivo 複合選択法 / X線結晶構造解析
Outline of Research at the Start

近年、PD-1/PD-L1などの免疫チェックポイントを標的とした、モノクローナル抗体 (mAb)ベースの抗がん剤が注目を集めている。それらはすでに、オプジーボなどの商品名で販売され、画期的な薬効を有する抗がん剤として用いられている。一方で、mAb抗がん剤は、薬価が非常に高額になることが社会問題にもなっている。そこで本研究では、人工抗体タンパク質による免疫チェックポイント阻害剤の開発を目指す。

Outline of Final Research Achievements

Since the 1980s, cancer has consistently been the leading cause of death in our country, and it is said that one in two citizens will suffer from it in their lifetime. Furthermore, with rapid aging, the number of patients continues to increase. The mainstays of cancer treatment have been surgery, chemotherapy, and radiotherapy, but in recent years, cancer immunotherapy, such as OPDIVO developed by Professor Honjo and others, is becoming the fourth pillar. On the other hand, drugs like OPDIVO are antibody medicines and are problematic due to their high cost, minimally invasive nature, and unexpected immunogenicity.
Therefore, the lead researchers tackled the preparation of artificial antibody proteins and small molecule compounds as alternatives to OPDIVO, using an in-silico/in-cell hybrid selection method. As a result, we succeeded in preparing candidate drugs with immune checkpoint inhibition effects.

Academic Significance and Societal Importance of the Research Achievements

オプジーボなどのモノクローナル抗体薬は、免疫チェックポイント阻害剤としてだけではなく、抗がん剤や、最近では、アルツハイマーの治療にも使われている。一方、モノクローナル抗体薬は、製造コストが高いため、一般に薬価は高額であり、国の健康医療保険制度に負担をかけている。
そのため、本研究で成功した手法により、モノクローナル抗体医薬品を代替できるようになれば、薬価を抑え、医療コストの抑制につながることが期待できる。これは、国の医療制度の持続可能性を高めることにつながる。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (11 results)

All 2023 2022 2021 2020 Other

All Journal Article (5 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 5 results,  Open Access: 2 results) Presentation (1 results) Remarks (1 results) Patent(Industrial Property Rights) (4 results) (of which Overseas: 1 results)

  • [Journal Article] Development of an RHEB-Targeting Peptide To Inhibit mTORC1 Kinase Activity2022

    • Author(s)
      Shams Raef、Ito Yoshihiro、Miyatake Hideyuki
    • Journal Title

      ACS Omega

      Volume: 7 Issue: 27 Pages: 23479-23486

    • DOI

      10.1021/acsomega.2c01865

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Mapping of mTOR drug targets: Featured platforms for anti-cancer drug discovery2022

    • Author(s)
      Shams Raef、Ito Yoshihiro、Miyatake Hideyuki
    • Journal Title

      Pharmacology&Therapeutics

      Volume: 232 Pages: 108012-108012

    • DOI

      10.1016/j.pharmthera.2021.108012

    • Related Report
      2022 Research-status Report 2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Development of a Non-IgG PD-1/PD-L1 Inhibitor by in Silico Mutagenesis and an In-Cell Protein-Protein Interaction Asasy2021

    • Author(s)
      Boyang Ning, Xueli Ren, Kyoji Hagiwara, Shinji Takeoka, Yoshihiro Ito, and Hideyuki Miyatake
    • Journal Title

      ACS Chemical Biology

      Volume: 16(2) Issue: 2 Pages: 316-323

    • DOI

      10.1021/acschembio.0c00817

    • Related Report
      2021 Research-status Report 2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] In Silico and In Cell Hybrid Selection of Nonrapalog Ligands to Allosterically Inhibit the Kinase Activity of mTORC12021

    • Author(s)
      Shams Raef、Matsukawa Akihiro、Ochi Yukari、Ito Yoshihiro、Miyatake Hideyuki
    • Journal Title

      Journal of Medicinal Chemistry

      Volume: 65 Issue: 2 Pages: 1329-1341

    • DOI

      10.1021/acs.jmedchem.1c00536

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Evaluation of the Binding Kinetics of RHEB with mTORC1 by In-Cell and In Vitro Assays2021

    • Author(s)
      Shams Raef、Ito Yoshihiro、Miyatake Hideyuki
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 22 Issue: 16 Pages: 8766-8766

    • DOI

      10.3390/ijms22168766

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] mTORC1のキナーゼ活性をアロステリックに阻害する非ラパログリガンドのin silicoおよびin cellハイブリッド選択2023

    • Author(s)
      Shams Raef, 松川 昭博, 越智 由香里, 伊藤 嘉浩, 宮武 秀行
    • Organizer
      日本生化学会
    • Related Report
      2023 Annual Research Report
  • [Remarks] 伊藤ナノ医工学研究室

    • URL

      http://www2.riken.jp/nano-med.eng.lab/publications.html

    • Related Report
      2020 Research-status Report
  • [Patent(Industrial Property Rights)] 新規なmTORC1阻害作用を有する化合物を含む、制癌剤、発 がん抑制剤および寿命延長剤2023

    • Inventor(s)
      宮武秀行、他
    • Industrial Property Rights Holder
      宮武秀行、他
    • Industrial Property Rights Type
      特許
    • Filing Date
      2023
    • Related Report
      2023 Annual Research Report
  • [Patent(Industrial Property Rights)] 5.新規なmTORC1阻害作用を有する化合物を含む、制癌剤、発がん抑制剤および寿命延長剤2021

    • Inventor(s)
      宮武秀行、伊藤嘉浩、Raef Shams、松川 昭博
    • Industrial Property Rights Holder
      宮武秀行、伊藤嘉浩、Raef Shams、松川 昭博
    • Industrial Property Rights Type
      特許
    • Filing Date
      2021
    • Related Report
      2021 Research-status Report
    • Overseas
  • [Patent(Industrial Property Rights)] 新規なmTORC1阻害作用を有する化合物を含む、制癌剤、発がん抑制剤および寿命延長剤2020

    • Inventor(s)
      2020
    • Industrial Property Rights Holder
      2020
    • Industrial Property Rights Type
      特許
    • Filing Date
      2020
    • Related Report
      2022 Research-status Report
  • [Patent(Industrial Property Rights)] 新規なmTORC1阻害作用を有する化合物を含む、制癌剤、発がん抑制剤および寿命延長剤2020

    • Inventor(s)
      宮武秀行
    • Industrial Property Rights Holder
      宮武秀行
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2020-160450
    • Filing Date
      2020
    • Related Report
      2021 Research-status Report

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Published: 2020-04-28   Modified: 2025-01-30  

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