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Elucidation of ligands of cancer-specific monomorphic major histocompatibility complexes and development of novel antibody therapies

Research Project

Project/Area Number 21K07214
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 50020:Tumor diagnostics and therapeutics-related
Research InstitutionUniversity of Toyama

Principal Investigator

Isobe Masaharu  富山大学, 学術研究部工学系, 特別研究教授 (70211050)

Project Period (FY) 2021-04-01 – 2025-03-31
Project Status Completed (Fiscal Year 2024)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
KeywordsMR1 / リガンド / T細胞受容体様抗体 / がん治療用抗体 / T細胞受容体
Outline of Research at the Start

HLAには多数の多形が存在するため、従来のTCRm-Ab ではHLA型が一致する患者にしか適用できないという課題があった。最近、MHC class I-related protein (MR1)と呼ばれる単形性の主要組織適合性抗原(MHC)分子が、がん細胞内で特異的に生成される代謝物由来のリガンドを抗原提示し、この抗原を認識するT細胞(MR1T)は、様々ながん細胞を除去できる事が報告された。そこで本研究では、この抗原分子に着目し、本分子を認識するTCRm-Abを多数単離することで、広範ながん患者に対して共通して利用可能な、治療用TCRm-Abの開発とがん細胞特異的リガンドの解明を目指す。

Outline of Final Research Achievements

A monomorphic major histocompatibility antigen (MHC) molecule called MHC class I-related protein (MR1) presents antigen together with an unknown ligand that is specifically generated in cancer cells. T cells that recognize this antigen (MR1T) have been reported to exhibit cytotoxic activity against various cancer cells. In this study, we aimed to identify the unknown ligand by massively expressing and purifying this antigen complex. The MR1 complex, which is thought to carry the endogenous ligand, was correctly transported to the extracellular space. However, the amount was much smaller than that of exogenously added a known ligand. Further improvements are required to identify cancer-specific ligands.

Academic Significance and Societal Importance of the Research Achievements

がん細胞で発現する単形性のMR1分子は、がん細胞内で特異的に精製されるリガンドと共に抗原提示されると考えられており、抗体医薬品の有力な標的分子となる可能性が高い。本研究では、内在性のリガンドを載せたMR1分子をわずかではあるが検出することができたことから、更なる大規模化を進めリガンド同定に至れば、様々ながんに適用可能な治療法開発に役立つと考えられる。

Report

(5 results)
  • 2024 Annual Research Report   Final Research Report ( PDF )
  • 2023 Research-status Report
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (10 results)

All 2025 2023 2022 2021

All Journal Article (7 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 7 results,  Open Access: 6 results) Presentation (3 results)

  • [Journal Article] Development and Clinical Evaluation of a Mpox Antigen-detecting Rapid Diagnostic Test2025

    • Author(s)
      Nobuyuki Kurosawa, Tatsuhiko Ozawa, Kousei Ozawa, Masayuki Shimojima, Madoka Kawahara, Fumi Kasuya, Wakaba Okada, Mami Nagashima, Kenji Sadamasu, Masae Itamoch, Hideki Tani, Yoshitomo Morinaga, Kosuke Yuhara, Jun Okamoto, Haruna Ichikawa, Takashi Kawahata, Tomomi Yamazaki, Masaharu Isobe
    • Journal Title

      Journal of Virological Methods

      Volume: - Pages: 115164-115164

    • DOI

      10.1016/j.jviromet.2025.115164

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Comprehensive analysis of nasal IgA antibodies induced by intranasal administration of the SARS-CoV-2 spike protein2025

    • Author(s)
      Waki Kentarou、Tani Hideki、Kawahara Eigo、Saga Yumiko、Shimada Takahisa、Yamazaki Emiko、Koike Seiichi、Morinaga Yoshitomo、Isobe Masaharu、Kurosawa Nobuyuki
    • Journal Title

      eLife

      Volume: 12

    • DOI

      10.7554/elife.88387.3

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] The development of a highly sensitive and quantitative SARS-CoV-2 rapid antigen test applying newly developed monoclonal antibodies to an automated chemiluminescent flow-through membrane immunoassay device2023

    • Author(s)
      Kengo Nishimura, Hiroaki Kitazawa, Takashi Kawahata, Kosuke Yuhara, Takahiro Masuya, Toshihiro Kuroita, Kentarou Waki, Seiichi Koike, Masaharu Isobe, Nobuyuki Kurosawa
    • Journal Title

      BMC Immunology

      Volume: 24 Issue: 1 Pages: 34-34

    • DOI

      10.1186/s12865-023-00567-y

    • Related Report
      2023 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Novel super-neutralizing antibody UT28K is capable of protecting against infection from a wide variety of SARS-CoV-2 variants2022

    • Author(s)
      Ozawa T, Tani H, Anraku Y, Kita S, Igarashi E, Saga Y, Inasaki N, Kawasuji H, Yamada H, Sasaki S, Somekawa M, Sasaki J, Hayakawa Y, Yamamoto Y, Morinaga Y, Kurosawa N, Isobe M, Fukuhara H, Maenaka K, Hashiguchi T, Kishi H, Kitajima I, Saito S, Niimi H
    • Journal Title

      mAbs

      Volume: 14 Issue: 1 Pages: 2072455-2072455

    • DOI

      10.1080/19420862.2022.2072455

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Polymorphic SERPINA3 prolongs oligomeric state of amyloid beta2021

    • Author(s)
      Akbor Maruf Mohammad、Kurosawa Nobuyuki、Nakayama Hiroki、Nakatani Ayumi、Tomobe Koji、Chiba Yoichi、Ueno Masaki、Tanaka Masashi、Nomura Yasuyuki、Isobe Masaharu
    • Journal Title

      PLOS ONE

      Volume: 16 Issue: 3 Pages: e0248027-e0248027

    • DOI

      10.1371/journal.pone.0248027

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Polymorphic SERPINA3-R124C reduces pathogenesis of its wild type by shortening the lifetime of oligomeric Aβ2021

    • Author(s)
      Akbor Maruf Mohammad、Kurosawa Nobuyuki、Tanaka Masashi、Isobe Masaharu
    • Journal Title

      Bioscience, Biotechnology, and Biochemistry

      Volume: 85 Issue: 8 Pages: 1861-1868

    • DOI

      10.1093/bbb/zbab101

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] A candidate gene of Alzheimer diseases was mutated in senescence-accelerated mouse prone (SAMP) 8 mice2021

    • Author(s)
      Akbor Maruf Mohammad、Kim Juhyon、Nomura Mai、Sugioka Juno、Kurosawa Nobuyuki、Isobe Masaharu
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 572 Pages: 112-117

    • DOI

      10.1016/j.bbrc.2021.07.095

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] SARS-CoV-2スパイクタンパク質経鼻免疫マウス鼻粘膜組織由来モノクローナルIgA抗体の網羅的解析2022

    • Author(s)
      和氣 健太郎, 谷 英樹, 岡田 茉那, 磯部 正治, 黒澤 信幸
    • Organizer
      第95回日本生化学会大会
    • Related Report
      2022 Research-status Report
  • [Presentation] SARS-COV2スパイクタンパク質の経鼻免疫で誘導されるマウス鼻腔粘膜由来IgAモノクローナル抗体取の特異性解析2021

    • Author(s)
      和氣 健太郎, 黒澤 信幸, 磯部 正治
    • Organizer
      日本生化学会第94大会
    • Related Report
      2021 Research-status Report
  • [Presentation] 多形型SERPINA3はamyloidβ42のオリゴマー状態を延長させることで神経毒性を増強させる2021

    • Author(s)
      磯部正治, AKBOR Maruf, 中山弘暉, 中谷亜佑未, 友部浩二, 黒澤信幸
    • Organizer
      日本分子生物学会第44年会
    • Related Report
      2021 Research-status Report

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Published: 2021-04-28   Modified: 2026-01-16  

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