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Molecular mechanism of platelet integrin activation and association with vascular lesion

Research Project

Project/Area Number 19K08813
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 InstitutionOsaka University

Principal Investigator

Hirokazu Kashiwagi  大阪大学, 医学部附属病院, 准教授 (10432535)

Co-Investigator(Kenkyū-buntansha) 加藤 恒  大阪大学, 医学系研究科, 講師 (20705214)
冨山 佳昭  大阪大学, 医学部附属病院, 特任教授(常勤) (80252667)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywordsインテグリン / 血小板
Outline of Research at the Start

血小板インテグリンαIIbβ3は、生理的止血および病的血栓形成の中心的役割を担う。αIIbβ3のリガンド結合能は活性化シグナルにより誘導される構造変化により制御されているが、その詳細は依然として不明な点が多い。また血小板が血栓形成以外に多彩な生理的役割をもつが、それらにおけるαIIbβ3活性化の意義に関しても十分な解析がなされていない。本研究では、我々が開発した活性化解析システムおよび遺伝子改変マウスを用いることにより、αIIbβ3活性化のメカニズムおよびその生体内、特に血管病変形成における役割を明らかし、新たな抗血小板療法の開発とその臨床的応用の可能性を明らかにすることを目的としている。

Outline of Final Research Achievements

We established αIIb(R995W) knock-in mice, which show constitutive activation of αIIbβ3, and recealed that the mice showed macrothrombocytopenia like human subjects. There are no difference in morphology and number of megakaryocytes in bone marrow and spleen between KI mice and WT mice. Megakaryocytic differentiation is not impaired in KI mice, either. However, proplatelet formation in cultured megakaryocyte was impaired in KI mice, suggesting that impaired proplatelet formation may responsible for the phenotype. KI mice showed highly impaired platelet function mainly due to reduced αIIbβ3 expression in platelets. We also found novel β3 mutation in macrothrombocytopenic patients. The mutation does not induce constitutive αIIbβ3 activation, and we are now investigating the mechanism of the integrin mutation and platelet production and function

Academic Significance and Societal Importance of the Research Achievements

血小板は動脈硬化性血管病変の形成に中心的役割を担う。今回の研究により血小板機能の中で最も重要であるαIIbβ3の恒常的活性化が血小板産生および血小板機能に及ぼす影響を、ノックインマウスを用いることにより明らかにすることができた。さらに直接αIIbβ3,の活性化を誘導しない変異によってもαIIbβ3の変異により血小板産生に影響を与える可能性を示した。今後の更なる分子機構の解明により、血小板機能および血小板産生のメカニズムの一端が明らかにされていくことが期待される。

Report

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

    (20 results)

All 2022 2020 2019 2018

All Journal Article (10 results) (of which Peer Reviewed: 10 results,  Open Access: 4 results) Presentation (10 results) (of which Int'l Joint Research: 3 results,  Invited: 4 results)

  • [Journal Article] Autoimmune-mediated thrombocytopenia after allogeneic hematopoietic stem cell transplantation: significance of detecting reticulated platelets and glycoprotein-specific platelet autoantibodies2022

    • Author(s)
      Akuta Keigo、Fukushima Kentaro、Nakata Keiichi、Hayashi Satoru、Toda Jun、Shingai Yasuhiro、Tsutsumi Kazuhito、Machida Tomohisa、Hino Akihisa、Kusakabe Shinsuke、Doi Yukiko、Fujita Jiro、Kato Hisashi、Maeda Tetsuo、Yokota Takafumi、Tomiyama Yoshiaki、Hosen Naoki、Kashiwagi Hirokazu
    • Journal Title

      International Journal of Hematology

      Volume: 115 Issue: 3 Pages: 322-328

    • DOI

      10.1007/s12185-021-03272-x

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Development of an Automated Chemiluminescent Enzyme Immunoassay for Measuring Thrombopoietin in Human Plasma2022

    • Author(s)
      Nishikawa Yukihiro、Nishida Shiyo、Kuroda Keiko、Kashiwagi Hirokazu、Tomiyama Yoshiaki、Kuwana Masataka
    • Journal Title

      Diagnostics

      Volume: 12 Issue: 2 Pages: 313-313

    • DOI

      10.3390/diagnostics12020313

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Reevaluation of platelet function in chronic immune thrombocytopenia: impacts of platelet size, platelet-associated anti-αIIbβ3 antibodies and thrombopoietin receptor agonists2020

    • Author(s)
      Nishiura N, Kashiwagi H, Akuta K, Hayashi S, Kato H, Kanakura Y, Tomiyama Y.
    • Journal Title

      Br J Haematol .

      Volume: 189 Issue: 4 Pages: 760-771

    • DOI

      10.1111/bjh.16439

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Risk factors for skin, mucosal, and organ bleeding in adults with primary ITP: a nationwide study in Japan2020

    • Author(s)
      Hato T, Shimada N, Kurata Y, Kuwana M, Fujimura K, Kashiwagi H, Takafuta T, Murata M, Tomiyama Y.
    • Journal Title

      Blood Adv

      Volume: 4 Pages: 1648-1655

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Reference guide for management of adult immune thrombocytopenia in Japan: 2019 Revision.2020

    • Author(s)
      Kashiwagi H, Kuwana M, Hato T, Takafuta T, Fujimura K, Kurata Y, Murata M, Tomiyama Y
    • Journal Title

      International Journal of Hematology

      Volume: 111 Issue: 3 Pages: 329-351

    • DOI

      10.1007/s12185-019-02790-z

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Knock‐in mice bearing constitutively active αIIb(R990W) mutation develop macrothrombocytopenia with severe platelet dysfunction2019

    • Author(s)
      Akuta Keigo、Kiyomizu Kazunobu、Kashiwagi Hirokazu、Kunishima Shinji、Nishiura Nobuko、Banno Fumiaki、Kokame Koichi、Kato Hisashi、Kanakura Yuzuru、Miyata Toshiyuki、Tomiyama Yoshiaki
    • Journal Title

      Journal of Thrombosis and Haemostasis

      Volume: 18 Issue: 2 Pages: 497-509

    • DOI

      10.1111/jth.14678

    • Related Report
      2020 Research-status Report 2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Additional validation of Osaka method (0.01 mol/L dithiothreitol) for negating the daratumumab interference.2019

    • Author(s)
      Hosokawa M, Kashiwagi H, Nakayama K, Sakuragi M, Nakao M, Morikawa T, Kiyokawa T, Aochi H, Nagamine K, Shibayama H, Tomiyama Y.
    • Journal Title

      Transfusion.

      Volume: 59 Issue: 7 Pages: 2479-2480

    • DOI

      10.1111/trf.15305

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Updated international consensus report on the investigation and management of primary immune thrombocytopenia.2019

    • Author(s)
      Provan D, Arnold DM, Bussel JB, Chong BH, Cooper N, Gernsheimer T, Ghanima W, Godeau B, Gonzlez-Lopez TJ, Grainger J, Hou M, Kruse C, McDonald V, Michel M, Newland AC, Pavord S, Rodeghiero F, Scully M, Tomiyama Y, Wong RS, Zaja F, Kuter DJ
    • Journal Title

      Blood Adv

      Volume: 26 Issue: 22 Pages: 3780-3817

    • DOI

      10.1182/bloodadvances.2019000812

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] 成人特発性血小板減少性紫斑病治療の参照ガイド 2019改訂版2019

    • Author(s)
      柏木浩和, 桑名正隆, 羽藤高明, 高蓋寿朗, 藤村欣吾, 倉田義之, 村田満, 冨山佳昭.
    • Journal Title

      臨床血液

      Volume: 60 Pages: 877-896

    • NAID

      130007702147

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] A unique phenotype of acquired Glanzmann thrombasthenia due to non-function-blocking anti-αIIbβ3 autoantibodies2018

    • Author(s)
      Akuta K.、Kashiwagi H.、Yujiri T.、Nishiura N.、Morikawa Y.、Kato H.、Honda S.、Kanakura Y.、Tomiyama Y.
    • Journal Title

      Journal of Thrombosis and Haemostasis

      Volume: 17 Issue: 1 Pages: 206-219

    • DOI

      10.1111/jth.14323

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] Increased Cleavage of VWF by ADAMTS13 Might Reduce High-molecular-weight VWF Multimers, Leading to Acquired von Willebrand Syndrome in Patients with Essential Thrombocythemia2022

    • Author(s)
      Kubo M, Kashiwagi H, Yagi H, Seki Y, Hasegawa A, Tanaka H, Amono I, Tomiyama Y, Matsumoto M
    • Organizer
      ISTH2021 Congress
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] トロンボポエチン受容体作動薬の切り替えが著効し寛解となった慢性ITP2022

    • Author(s)
      芥田敬吾、柏木浩和、林 悟、中田継一、加藤 恒、保仙直毅 、冨山佳昭
    • Organizer
      第43回日本血栓止血学会学術集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] ITPの病態、診断と治療2022

    • Author(s)
      柏木浩和
    • Organizer
      第43回日本血栓止血学会学術集会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] ITPと血小板輸血2020

    • Author(s)
      柏木浩和、冨山佳昭
    • Organizer
      第68回日本輸血・細胞治療学会総会
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] 新規のインテグリンαIIbβ3非活性化変異β3(R734C)を認めた一家系2020

    • Author(s)
      芥田敬吾、柏木浩和、西浦伸子、加藤恒、保仙直毅、金倉譲、冨山佳昭
    • Organizer
      第42回日本血栓止血学会学術集会
    • Related Report
      2020 Research-status Report
  • [Presentation] Platelet function of chronic immune thrombocytopenia: Impact of platelet size, platelet-associated anti-αIIbβ3 antibodies and thrombopoietin receptor agonists.2019

    • Author(s)
      Nishiura N, Kashiwagi H, Akuta K, Kato H, Kanakura Y, Tomiyama Y
    • Organizer
      The XXVII Congress of the International Society of Thrombosis and Haemostasis
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] The critical role of Kindlin-3 in initiation of physiological thrombus formation; analysis of Kindlin-3 deficient patient2019

    • Author(s)
      Hisashi Kato, Shigenori Honda, Hirokazu Kashiwagi, Nobuko Nishiura, Keigo Akuta, Koichi Kokame, Toshiyuki Miyata, Yoshiaki Tomiyama
    • Organizer
      The American Society of Hematology 61th Annual Meeting
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 抗血小板同種抗体および自己抗体の特徴とその臨床的意義2019

    • Author(s)
      柏木浩和,冨山佳昭
    • Organizer
      第67回日本輸血・細胞治療学会学術集会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] 新規のインテグリンαIIbβ3非活性化変異β3(R734C)を認めた一家系2019

    • Author(s)
      芥田敬吾, 柏木浩和, 西浦伸子, 加藤 恒, 金倉 譲, 冨山佳昭
    • Organizer
      第81回日本血液学会学術集会
    • Related Report
      2019 Research-status Report
  • [Presentation] Flow cytometryを用いた慢性ITP患者の血小板機能解析2019

    • Author(s)
      柏木浩和,西浦伸子,冨山佳昭
    • Organizer
      第13回日本血栓止血学会学術標準化委員会シンポジウム
    • Related Report
      2019 Research-status Report
    • Invited

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Published: 2019-04-18   Modified: 2023-01-30  

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