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Development of antibody drugs targeting platelet activating receptor CLEC-2 and elucidation of the pharmacological actions

Research Project

Project/Area Number 20K08729
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 54010:Hematology and medical oncology-related
Research InstitutionUniversity of Yamanashi

Principal Investigator

Sasaki Tomoyuki  山梨大学, 大学院総合研究部, 准教授 (40739124)

Co-Investigator(Kenkyū-buntansha) 井上 克枝  山梨大学, 大学院総合研究部, 教授 (10324211)
築地 長治  山梨大学, 大学院総合研究部, 講師 (20710362)
白井 俊光  山梨大学, 大学院総合研究部, 助教 (50710381)
大竹 志門  山梨大学, 大学院総合研究部, 助教 (50813060)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
KeywordsCLEC-2 / 血小板 / 抗体医薬
Outline of Research at the Start

本研究の目的は,抗血栓症及び抗癌転移作用等を期待できるCLEC-2を標的とした抗体医薬(抗CLEC-2抗体医薬)の開発とその抗体の作用メカニズムを含めた薬理作用の解明である.我々が目指す抗CLEC-2抗体医薬は,メカニズムに不明な点を残している特異な作用:『抗CLEC-2抗体が血小板CLEC-2を欠損させる作用』に基づいており,その不明点の解明と同時に開発研究を進める.薬剤としての安全性を担保するためには,作用の不明点を解明することは大変重要である.特異性が高く,免疫原性の低い安全で効果的な抗CLEC-2抗体医薬は,抗血栓や抗癌転移へのまったく新しい治療薬として期待できる.

Outline of Final Research Achievements

The purpose of this study is to develop a clinically applicable anti-CLEC-2 drug, and to solve the problem of side effects such as thrombocytopenia caused by deletion or fragmentation of platelet activation ability by applying recent antibody modification technology based on the antibody already discovered. For this purpose, to enable functional modification of an existing antibody (clone name: 2A2B10), we have genetically modified it into a recombinant antibody and also into a mouse chimeric antibody, and have confirmed that the functions of the antibodies are equivalent. In addition, the yield was increased and the running cost was reduced by revising the gene transfer method. However, due to difficulties in epitope analysis, we were unable to reach the stage where we could begin modifying the antibody for use as an antibody drug.

Academic Significance and Societal Importance of the Research Achievements

血小板CLEC-2の病態生理学的意義は、血小板血栓の形成に留まらず、血栓の安定化、癌の転移、肺発生、横紋筋融解症の重症化に寄与することが報告されている。血小板CLEC-2が治療標的となる疾患は拡大しており、有望な標的である。抗CLEC-2抗体のエピトープが判明したことは、今後の抗体医薬開発のための重要な情報である。

Report

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

    (18 results)

All 2023 2022 2021 2020 Other

All Journal Article (7 results) (of which Peer Reviewed: 6 results,  Open Access: 1 results) Presentation (10 results) (of which Int'l Joint Research: 2 results) Remarks (1 results)

  • [Journal Article] Platelets and COVID-192023

    • Author(s)
      SUZUKI-INOUE Katsue、SHIRAI Toshiaki、SASAKI Tomoyuki
    • Journal Title

      Japanese Journal of Thrombosis and Hemostasis

      Volume: 34 Issue: 1 Pages: 53-57

    • DOI

      10.2491/jjsth.34.53

    • ISSN
      0915-7441, 1880-8808
    • Related Report
      2022 Annual Research Report
  • [Journal Article] Detection of SARS-CoV-2 RNA Using RT-qPCR in Saliva Samples and Nasopharyngeal, Lingual, and Buccal Mucosal Swabs2022

    • Author(s)
      Sasaki Tomoyuki、Inoue Osamu、Ogihara Shinji、Kubokawa Kayo、Oishi Saori、Shirai Toshiaki、Iwabuchi Keisuke、Suzuki-Inoue Katsue
    • Journal Title

      Japanese Journal of Infectious Diseases

      Volume: 75 Issue: 1 Pages: 102-104

    • DOI

      10.7883/yoken.JJID.2021.091

    • NAID

      130008143955

    • ISSN
      1344-6304, 1884-2836
    • Year and Date
      2022-01-31
    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Apparent Life-Threatening Event in an Infant with SARS-CoV-2 Infection2021

    • Author(s)
      Sano Fumikazu、Yagasaki Hideaki、Kojika Satoru、Toda Takako、Kono Yosuke、Suzuki-Inoue Katsue、Sasaki Tomoyuki、Ogihara Shinji、Matsuno Towa、Inoue Osamu、Moriguchi Takeshi、Harii Norikazu、Goto Junko、Shimizu Tatsuya、Inukai Takeshi
    • Journal Title

      Japanese Journal of Infectious Diseases

      Volume: 74 Issue: 3 Pages: 236-239

    • DOI

      10.7883/yoken.JJID.2020.572

    • NAID

      130008042007

    • ISSN
      1344-6304, 1884-2836
    • Year and Date
      2021-05-31
    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] CLEC-2 stimulates IGF-1 secretion from podoplanin-positive stromal cells and positively regulates erythropoiesis in mice2021

    • Author(s)
      Shimon Otake, Tomoyuki Sasaki, Toshiaki Shirai, Nagaharu Tsukiji, Shogo Tamura, Katsuhiro Takano, Yukio Ozaki, Katsue Suzuki-Inoue
    • Journal Title

      Journal of Thrombosis and Haemostasis

      Volume: - Issue: 6 Pages: 1572-1584

    • DOI

      10.1111/jth.15317

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Heme activates platelets and exacerbates rhabdomyolysis-induced acute kidney injury via CLEC-2 and GPVI/FcRγ2021

    • Author(s)
      S. Oishi, N. Tsukiji, S. Otake, N. Oishi, T. Sasaki, T. Shirai, Y. Yoshikawa, K. Takano, H. Shinmori, T. Inukai, T. Kondo, K. Suzuki-Inoue
    • Journal Title

      blood advances

      Volume: 5 Issue: 7 Pages: 2017-2026

    • DOI

      10.1182/bloodadvances.2020001698

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Role of Platelet C-Type Lectin-Like Receptor 2 in Promoting Lung Metastasis in Osteosarcoma2020

    • Author(s)
      Jiro Ichikawa, Takashi Ando, Tomonori Kawasaki, Tomoyuki Sasaki, Toshiaki Shirai, Nagaharu Tsukiji, Yujiro Kimura, Kaoru Aoki, Keiko Hayakawa, Katsue Suzuki-Inoue, Masao Saitoh, Hirotaka Haro
    • Journal Title

      Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research

      Volume: in press Issue: 9 Pages: 1738-1750

    • DOI

      10.1002/jbmr.4045

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] A first case of meningitis/encephalitis associated with SARS-Coronavirus-22020

    • Author(s)
      Moriguchi T、Harii N、Goto J、Harada D、Sugawara H、Takamino J、Ueno M、Sakata H、Kondo K、Myose N、Nakao A、Takeda M、Haro H、Inoue O、Suzuki-Inoue K、Kubokawa K、Ogihara S、Sasaki T、Kinouchi H、Kojin H、Ito M、Onishi H、Shimizu T、Sasaki Y、Enomoto N、Ishihara H、Furuya S、Yamamoto T、Shimada S
    • Journal Title

      International Journal of Infectious Diseases

      Volume: 94 Pages: 55-58

    • DOI

      10.1016/j.ijid.2020.03.062

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] Cancer-associated fibroblasts promote venous thrombosis through C-type lectin-like receptor 2/podoplanin in 3LL lung cancer mouse model2022

    • Author(s)
      Shirai T, Sasaki T, Tsukiji N, Ohishi S, Yokomori R, Takano K, Suzuki-Inoue K.
    • Organizer
      ISTH 2022 Congress
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 癌関連線維芽細胞はCLEC-2/PDPNを介して癌関連血栓症を増悪させる2022

    • Author(s)
      白井俊光, 佐々木知幸, 築地長治, 大石沙織, 横森良平, 高野勝弘, 井上克枝
    • Organizer
      第44回日本血栓止血学会学術集会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 硫酸化多糖カラギーナンはCLEC-2依存症に血小板を活性化する2022

    • Author(s)
      横森良平, 白井俊光, 佐々木知幸, 築地長治, 大石沙織, 高野勝弘, 井上克枝
    • Organizer
      第44回日本血栓止血学会学術集会
    • Related Report
      2022 Annual Research Report
  • [Presentation] CLEC-2はPDPN発現間質細胞からのIGF-1分泌を促進し、赤血球造血を正に制御する2021

    • Author(s)
      大竹 志門, 佐々木 知幸, 白井 俊光, 築地 長治, 高野 勝弘, 田村 彰吾, 尾崎 由基男, 井上 克枝
    • Organizer
      第83回日本血液学会学術集会
    • Related Report
      2021 Research-status Report
  • [Presentation] Functional characterization of recombinant snake verom rhodocytin: rhodocytin mutant blocks CLEC-2/podoplanin-dependent platelet aggregation and lung metastasis.2021

    • Author(s)
      Tomoyuki Sasaki
    • Organizer
      第43回日本血栓止血学会学術集会
    • Related Report
      2021 Research-status Report
  • [Presentation] 横紋筋融解症に併発する腎障害における血小板CLEC-2及びGPVIの役割2021

    • Author(s)
      大石沙織,築地長治、大竹志門、大石直輝、佐々木知幸、白井俊光、吉河佑莉、髙野勝弘、新森英之、犬飼岳史、近藤哲夫、井上克枝
    • Organizer
      第43回日本血栓止血学会学術集会
    • Related Report
      2021 Research-status Report
  • [Presentation] Heme Activates Platelets and Exacerbates Rhabdomyolysis-Induced Acute Kidney Injury via CLEC-2 and GPVI/FcRγ2020

    • Author(s)
      S. Oishi, N. Tsukiji, S. Otake, N. Oishi, T. Sasaki, T. Shirai, Y. Yoshikawa, K. Takano, T. Kondo, K. Suzuki-Inoue
    • Organizer
      ISTH 2020 Congress(2020.07.12)
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] 血小板受容体CLEC-2による関節リウマチの病態形成への関与2020

    • Author(s)
      佐々木知幸, 白井俊光, 築地長治, 小山賢介, 田村彰吾, 大竹志門, 高野勝弘, 長田誠, 佐藤金夫, 波呂浩孝, 尾崎由基男, 井上克枝
    • Organizer
      第42回日本血栓止血学会学術集会(2020.06.18)
    • Related Report
      2020 Research-status Report
  • [Presentation] 横紋筋融解症に併発する腎障害における血小板CLEC-2およびGPVIの役割2020

    • Author(s)
      大石沙織, 築地長治, 大竹志門, 大石直輝, 佐々木知幸, 白井俊光, 吉河佑莉, 高野勝弘, 近藤哲夫, 井上克枝
    • Organizer
      第42回日本血栓止血学会学術集会(2020.06.18)
    • Related Report
      2020 Research-status Report
  • [Presentation] 巨核球・血小板上C-type lectin-like receptor 2 (CLEC-2)の赤血球造血における役割2020

    • Author(s)
      大竹志門, 白井俊光, 築地長治, 佐々木知幸, 田村彰吾, 高野勝弘, 尾崎由基男, 井上克枝
    • Organizer
      第42回日本血栓止血学会学術集会(2020.06.18)
    • Related Report
      2020 Research-status Report
  • [Remarks] 山梨大学医学部附属病院検査部、輸血細胞治療部、大学院臨床検査医学講座のホームページ

    • URL

      https://clnlabmed.yamanashi.ac.jp/

    • Related Report
      2022 Annual Research Report 2021 Research-status Report 2020 Research-status Report

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Published: 2020-04-28   Modified: 2024-01-30  

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