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Identification of the protease in blood that activates complement factor MASP-3

Research Project

Project/Area Number 21K07083
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 49070:Immunology-related
Research InstitutionFukushima Medical University

Principal Investigator

Machida Takeshi  福島県立医科大学, 医学部, 講師 (80583632)

Co-Investigator(Kenkyū-buntansha) 関根 英治  福島県立医科大学, 医学部, 教授 (40363759)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
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)
KeywordsMASP-3 / 補体 / 第二経路 / D因子 / 補体第二経路 / 共免疫沈降 / ノックアウトマウス / レクチン経路認識分子
Outline of Research at the Start

補体系は重要な生体防御機構である一方、その無秩序な活性化は種々の炎症性疾患の増悪に関わる。本研究では、特に炎症性疾患の増悪に関わるとされる補体第二経路の活性化に必須のセリンプロテアーゼ『MASP-3』の活性化機構を解明する。MASP-3の活性化機構は、補体系の分子メカニズムにおいて唯一未解明である。申請者らは、血清中のプロテアーゼによるMASP-3の活性化機構の存在を強く示唆する結果を、ヒト・マウス両方において独自に見出した。本結果に基づき、MASP-3を活性化する血中プロテアーゼを新規に同定し、補体活性化の分子機構の全容を解明する。

Outline of Final Research Achievements

Unlike most complement factors, MASP-3 circulates in an activated form, but the mechanism of activation is unknown. Using recombinant MASP-3, we found that MASP-3 is converted to its activated form in serum and in vivo after intravenous administration in mice. Using the crosslinking co-immunoprecipitation strategy, we identified several molecules that form complexes with MASP-3 at least transiently and examined their ability to activate MASP-3. In addition, we newly found that the physiological significance of complex formation of MASP-3 with recognition molecules of the lectin complement pathway is not its direct contribution to MASP-3 activation, but its role in the long-term retention of MASP-3 in vivo. Our results partially clarified the dynamics of MASP-3 in vivo, which has remained unclear.

Academic Significance and Societal Importance of the Research Achievements

MASP-3は補体第二経路の活性化に必須の因子であり、補体による生体恒常性の維持を担う一方で、補体が無秩序に活性化されると、多くの炎症性疾患を引き起こすことが知られている。これらの疾患における研究で、第二経路の抑制が有効な治療戦略であることが見出されているが、第二経路の他の補体因子であるD因子やB因子は血中濃度が非常に高く、第二経路の最上流に位置し血中濃度が低いMASP-3を標的とした治療戦略は、より効果的で実用的なものとなり得る。本研究では、MASP-3の生体内における動態を一部明らかにしたもので、有効な治療法が確立されていない種々の補体介在性の炎症性疾患の分野において大きな意義を持つ。

Report

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

    (17 results)

All 2024 2023 2022 2021

All Journal Article (10 results) (of which Peer Reviewed: 8 results,  Open Access: 5 results) Presentation (7 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results)

  • [Journal Article] Complement activation products in tears of dry eye and meibomian gland dysfunction.2024

    • Author(s)
      Hiroki Maehara, Koki Norikawa, Keiichiro Tanaka, Yutaka Kato, Akihito Kasai, Ryo Mukai, Tomoko Omori, Takeshi Machida, Hideharu Sekine, and Tetsuju Sekiryu
    • Journal Title

      Sci Rep

      Volume: 14 Issue: 1 Pages: 43-43

    • DOI

      10.1038/s41598-023-46634-7

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Tear fluid and complement activation products in tears after ocular surgery2023

    • Author(s)
      Hiroki Maehara, Koki Norikawa, Keiichiro Tanaka, Yutaka Kato, Akihito Kasai, Tomoko Omori, Takeshi Machida, Hideharu Sekine, and Tetsuju Sekiryu
    • Journal Title

      BMC Ophthalmol

      Volume: 23 Issue: 1 Pages: 329-329

    • DOI

      10.1186/s12886-023-03037-6

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] C5a stimulation induces caspase-1 activation and mature IL-1β production in human peripheral blood mononuclear cells2023

    • Author(s)
      Fujita Yuya、Matsumoto Haruki、Inada Kenji、Onizawa Michio、Saito Kenji、Sumichika Yuya、Yoshida Shuhei、Temmoku Jumpei、Matsuoka Naoki、Asano Tomoyuki、Sato Shuzo、Machida Takeshi、Migita Kiyoshi
    • Journal Title

      Immunological Medicine

      Volume: 15 Issue: 2 Pages: 1-8

    • DOI

      10.1080/25785826.2023.2292665

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 重症筋無力症の病態:補体の役割と活性化のメカニズム2023

    • Author(s)
      町田豪、関根英治
    • Journal Title

      脳神経内科

      Volume: 98 Pages: 809-815

    • Related Report
      2023 Annual Research Report
  • [Journal Article] The complex formation of MASP-3 with pattern recognition molecules of the lectin complement pathway retains MASP-3 in the circulation2022

    • Author(s)
      Kohei Kusakari, Takeshi Machida, Yumi Ishida, Tomoko Omori, Toshiyuki Suzuki, Masayuki Sekimata, Ikuo Wada, Teizo Fujita, and Hideharu Sekine
    • Journal Title

      Frontiers in Immunology

      Volume: 13 Pages: 907023-907023

    • DOI

      10.3389/fimmu.2022.907023

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] "Factor D" in "Alternative Pathway / Amplification Loop Basics"2022

    • Author(s)
      Hideharu Sekine, Takeshi Machida, and Teizo Fujita
    • Journal Title

      Immunological Reviews

      Volume: 313 Issue: 1 Pages: 15-24

    • DOI

      10.1111/imr.13155

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] 補体の多面性:自然免疫・獲得免疫と補体2022

    • Author(s)
      町田豪, 関根英治
    • Journal Title

      Japanese Journal of Clinical Medicine

      Volume: 80 Pages: 1728-1734

    • Related Report
      2022 Research-status Report
  • [Journal Article] Age-Related Maculopathy Susceptibility 2 and Complement Factor H Polymorphism and Intraocular Complement Activation in Neovascular Age-Related Macular Degeneration2022

    • Author(s)
      Yutaka Kato, Yasuharu Oguchi, Tomoko Omori, Akihito Kasai, Masashi Ogasawara, Yukinori Sugano, Kanako Itagaki, Akira Ojima, Yumi Ishida, Takeshi Machida, Hideharu Sekine, Tetsuju Sekiryu
    • Journal Title

      Ophthalmology Science

      Volume: 2 Issue: 2 Pages: 100167-100167

    • DOI

      10.1016/j.xops.2022.100167

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] ARMS2 and CFH polymorphism and intraocular complement activation in neovascular age-related macular degeneration2022

    • Author(s)
      Yutaka Kato, Yasuharu Oguchi, Tomoko Omori, Akihito Kasai, Masashi Ogasawara, Yukinori Sugano, Kanako Itagaki, Akira Ojima, Yumi Ishida, Takeshi Machida, Hideharu Sekine, Tetsuju Sekiryu
    • Journal Title

      Ophthalmology Science

      Volume: In press

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Changes in complement activation products after anti-VEGF injection for choroidal neovascularization in age-related macular degeneration and pachychoroid disease2021

    • Author(s)
      Tanaka Keiichiro、Oguchi Yasuharu、Omori Tomoko、Ishida Yumi、Shintake Hiroaki、Tomita Ryutaro、Kasai Akihito、Ogasawara Masashi、Sugano Yukinori、Itagaki Kanako、Ojima Akira、Machida Takeshi、Sekine Hideharu、Sekiryu Tetsuju
    • Journal Title

      Scientific Reports

      Volume: 11 Issue: 1 Pages: 8464-8464

    • DOI

      10.1038/s41598-021-87340-6

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Lack of MASP-1 results in delayed onset of renal dysfunction and prolonged survival in lupus-prone MRL/lpr mice2024

    • Author(s)
      Takeshi Machida, Hiroto Monoe, Yumi Ishida, Teizo Fujita, and Hideharu Sekine
    • Organizer
      第52回日本免疫学会学術集会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 補体レクチン経路の活性化機構と炎症性疾患への関与2023

    • Author(s)
      町田豪
    • Organizer
      日本比較免疫学会第 34 回学術集会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Lack of MASP-1 results in delayed onset of albuminuria and prolonged survival in lupus-prone MRL/lpr mice2023

    • Author(s)
      Takeshi Machida, Hiroto Monoe, Yumi Ishida, Teizo Fujita, and Hideharu Sekine
    • Organizer
      The 29th International Complement Workshop
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] MASP-1欠損MRL/lprマウスではループス様腎炎による腎機能障害の発症が遅延し、生存期間が延長する2023

    • Author(s)
      物江洋人、町田豪、石田由美、藤田禎三、関根英治
    • Organizer
      第59回日本補体学会学術集会
    • Related Report
      2023 Annual Research Report
  • [Presentation] ヨウ素酸ナトリウム誘発網膜障害モデルマウスにおけるMASP-1の役割2022

    • Author(s)
      大森智子, 町田豪, 石田由美, 石龍鉄樹, 関根英治
    • Organizer
      第58回日本補体学会学術集会
    • Related Report
      2022 Research-status Report
  • [Presentation] MASP-3 の活性化におけるレクチン経路の認識分子の役割2021

    • Author(s)
      草刈浩平、石田由美、大森智子、鈴木俊幸、関亦正幸、町田豪、関根英治
    • Organizer
      第57回日本補体学会学術集会
    • Related Report
      2021 Research-status Report
  • [Presentation] The significance of complex formation of MASP-3 with pattern recognition molecules of the lectin complement pathway in the long-term retention of MASP-3 in the circulation2021

    • Author(s)
      Takeshi Machida, Kohei Kusakari, Yumi Ishida, Tomoko Omori, Toshiyuki Suzuki, Masayuki Sekimata, Teizo Fujita, and Hideharu Sekine
    • Organizer
      28th International Complement Virtual Workshop
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research

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Published: 2021-04-28   Modified: 2025-01-30  

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