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Detection of neutrophil extracellular traps by measuring citrullinated fibrinogen in serum

Research Project

Project/Area Number 20K07822
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 52010:General internal medicine-related
Research InstitutionShinshu University

Principal Investigator

Higuchi Yumiko  信州大学, 医学部, 講師(特定雇用) (40757241)

Co-Investigator(Kenkyū-buntansha) 奥村 伸生  信州大学, 学術研究院保健学系, 特任教授 (60252110)
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: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywordsシトルリン化フィブリノゲン / 好中球細胞外トラップ / 炎症 / NETs / PAD / 感染症 / がん / PAD4
Outline of Research at the Start

感染等により活性化した好中球は、PAD4(Peptidylarginine deiminase type 4)の作用によって、核内のクロマチン繊維及び顆粒蛋白から成るNETs(Neutrophil extracellular trap)を細胞外に放出する。NETsは感染防御の役割を果たすが、その過剰形成は様々な炎症性疾患に関与することが明らかになってきている。
血清中に存在するシトルリン化フィブリノゲンは、NETsの形成に関与するPAD4の作用によって産生されることから、NETs検出のためのマーカーとなりうるかを検証する。

Outline of Final Research Achievements

The aim of this study was to investigate whether quantification of serum citrullinated fibrinogen (Cit-Fbg) could be used to detect neutrophil extracellular traps (NETs). First, Cit-Fbg levels in supernatants of phorbol 12-myristate 13-acetate-stimulated neutrophils co-cultured with fibrinogen significantly increased in vitro. Next, serum Cit-Fbg levels significantly increased in patients with infectious disease compared to healthy control (HC), and NETs marker levels also increased in patients with sepsis. Although serum Cit-Fbg levels also significantly increased in patients with cancer compared to HC, there was no increase in NETs markers in these patients.The increase in serum Cit-Fbg in infectious diseases may reflect inflammatory pathology, including NETs. Further investigation is needed to clarify the cause of the increase in Cit-Fbg in cancer patients.

Academic Significance and Societal Importance of the Research Achievements

シトルリン化フィブリノゲン(Cit-Fbg)濃度の上昇が好中球細胞外トラップ(NETs)に起因することをin vitroで定量的に示した。感染症患者の血清中Cit-Fbgは有意に上昇しており、特に敗血症においてはNETsの増加も認めたことから、Cit-FbgはNETsを含めた炎症病態を反映することが示唆された。がん患者の血清中Cit-Fbg増加原因については、Cit-FbgやNETsの低濃度域での検出の開発を含めさらなる検討が必要と考えられた。

Report

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

    (7 results)

All 2022 2021

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (6 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Changes in serum citrullinated fibrinogen concentration associated with the phase of bacteremia patients.2021

    • Author(s)
      Fujimura S, Higuchi Y, Usami Y, Yamaura M, Higuchi T, Terasawa F, Okumura N.
    • Journal Title

      Clin Chim Acta .

      Volume: 512 Pages: 127-134

    • DOI

      10.1016/j.cca.2020.10.038

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] 好中球細胞外トラップ検出のためのMyeloperoxidase-DNA複合体測定法の基礎的検討2022

    • Author(s)
      市川 友喜、須江 翼、藤村 哲士、宇佐美 陽子、樋口 由美子
    • Organizer
      第40回日本臨床化学甲信越支部総会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Validation of a sandwich enzyme-linked immunosorbent assay to determine serum citrullinated fibrinogen concentration2022

    • Author(s)
      Tomoki Ichikawa, Tsubasa Sue, Satoshi Fujimura, Yoko Usami, Tsukasa Higuchi, Nobuo Okumura, Yumiko Higuchi
    • Organizer
      The 17th Congress of Asian Society of Clinical Pathology and Laboratory Medicine (ASCPaLM)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Citrullinated fibrinogen for detection of neutrophil extracellular traps2022

    • Author(s)
      Tsubasa Sue, Tomoki Ichikawa, Satoshi Fujimura, Tsukasa Higuchi, Nobuo Okumura, Yumiko Higuchi
    • Organizer
      The 17th Congress of Asian Society of Clinical Pathology and Laboratory Medicine (ASCPaLM)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 新型コロナウイルス感染症における血中シトルリン化フィブリノゲン濃度の検討2022

    • Author(s)
      大谷ひかる、市川友喜 、藤村哲士、須江翼、服部周生、樋口由美子
    • Organizer
      第 46 回長野県臨床検査学会
    • Related Report
      2022 Annual Research Report
  • [Presentation] がん細胞株におけるフィブリノゲンのシトルリン化とPAD発現2022

    • Author(s)
      服部 周生, 須江 翼, 市川 友喜, 大谷 ひかる, 藤村 哲士, 樋口 由美子
    • Organizer
      第 46 回長野県臨床検査学会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 急性大動脈解離におけるシトルリン化フィブリノゲンの動態2021

    • Author(s)
      藤村哲士、樋口由美子、伊澤淳、宇佐美陽子、山浦洵、奥村伸生
    • Organizer
      第67回 日本臨床検査医学会 学術集会
    • Related Report
      2021 Research-status Report

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

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