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Detection of neutrophil extfacellular traps (NETs) in pathological specimens and elucidation of the NETs related diseases

Research Project

Project/Area Number 16K08699
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Human pathology
Research InstitutionFujita Health University

Principal Investigator

Shiogama Kazuya  藤田医科大学, 医療科学部, 講師 (10387699)

Co-Investigator(Kenkyū-buntansha) 尾之内 高慶  藤田医科大学, 共同利用研究設備サポートセンター, 講師 (20632954)
堤 寛  藤田医科大学, 医学部, 教授 (80138643)
Project Period (FY) 2016-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords好中球細胞外トラップ / NETosis / 免疫染色 / ホルマリン固定パラフィン切片 / 細胞診 / 走査型電顕 / 免疫電顕 / CLEM / 宮西氏分類 / 核線 / lactoferrin / フィブリン / 好中球細胞外トラップ(NETs) / 病理学 / 細胞死
Outline of Final Research Achievements

In 2004, it has been found that stimulated neutrophils can produce extracellular fibrils called neutrophil extracellular traps (NETs) that trap to kill microorganisms. NETs are composed of chromatin components and antimicrobiral factors. Fibrillar structures are observed in HE-stained sections and cytology specimens of fibrinous inflammation, including abscess. Not only fibrin but also NETs maybe included in these fibrillar material. We immunohistochemically investigated how NETs are involved in the process of fibrinous inflammation using FFPE and cytology specimens. Lactoferrin is the best NETs marker regardless of fibril size. NETs and fibrin can be distinguished using combination of HE-stained sections and immunostaining with some NETs markers. NETs and fibrin are co-localized in almost cytology specimens. NETs can be demonstrated using immunostaining with some NETs markers in cytology specimens. It is suggested that chromatin rich basophilic fibrils are comprised of NETs.

Academic Significance and Societal Importance of the Research Achievements

これまでフィブリンの析出だと思われてきた網目状構造物の中にNETsが含まれていることを免疫組織化学的解析によって明らかにした。その結果、病理診断の基本となるHE染色において、NETsとフィブリンを鑑別することに成功にした。この研究成果は、今後のNETsとフィブリンを鑑別するための病理診断基準になりえる。免疫染色をベースとする本研究は、特別な設備を使用しないため、今後のNETs研究において幅広く利用されることが大いに期待される。とくに、NETsが引き金になって生じる各種疾患の解明に役立つツールになる可能性が高い。

Report

(5 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (8 results)

All 2019 2018 2017 2016

All Presentation (8 results) (of which Int'l Joint Research: 1 results)

  • [Presentation] 好中球細胞外トラップと核線の鑑別:宮西分類に基づいた免疫組織化学的解析2019

    • Author(s)
      塩竈和也、小林加奈、道塲彩乃、舟橋正範、今枝義博、尾之内高慶、平山将也、金子千之、柳田隆正、稲田健一、安倍雅人
    • Organizer
      第60回日本臨床細胞学会春期大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Visualization of neutrophil extracellular traps (NETs) in histo- and cytopathology specimens2019

    • Author(s)
      Kazuya Shiogama
    • Organizer
      The 13th Japan-China Joint Seminar Histochemistry and Cytochemistry
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] パラフィン切片を用いた光-電子相関顕微鏡法の応用2018

    • Author(s)
      尾之内高慶、塩竈和也、平山将也
    • Organizer
      第17回コ・メディカル形態機能学会
    • Related Report
      2018 Research-status Report
  • [Presentation] 細胞診標本から好中球細胞外トラップをとらえる2018

    • Author(s)
      塩竈和也、舟橋正範、尾之内高慶、水谷泰嘉、今枝義博、金子千之、柳田隆正、稲田健一、安倍雅人、堤 寛
    • Organizer
      第107回日本病理学会
    • Related Report
      2018 Research-status Report
  • [Presentation] 細胞診標本から好中球細胞外トラップ(NETs)をとらえる2018

    • Author(s)
      塩竈和也、舟橋正範、尾之内高慶、水谷泰嘉、今枝義博、稲田健一、金子千之、柳田隆正、安倍雅人、堤 寛
    • Organizer
      第59回日本組織細胞化学会
    • Related Report
      2018 Research-status Report
  • [Presentation] Identification of neutrophil extracellular traps in cytology specimens.2017

    • Author(s)
      塩竈和也、山本風香、水谷泰嘉、尾之内高慶、櫻井浩平、稲田健一、堤寛
    • Organizer
      第106回日本病理学会総会
    • Related Report
      2017 Research-status Report
  • [Presentation] 炎症性細胞診標本中に好中球細胞外トラップは存在するのか?2017

    • Author(s)
      塩竈和也、櫻井浩平、稲田健一、堤寛
    • Organizer
      第58回日本臨床細胞学会総会春期大会
    • Related Report
      2017 Research-status Report
  • [Presentation] NETs and fibrin distinction with HE staining and immunostaining2016

    • Author(s)
      塩竈和也、尾之内高慶、水谷泰嘉、櫻井浩平、稲田健一、堤寛
    • Organizer
      第105回日本病理学会総会
    • Place of Presentation
      仙台国際センター(宮城県仙台市)
    • Year and Date
      2016-05-12
    • Related Report
      2016 Research-status Report

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Published: 2016-04-21   Modified: 2021-02-19  

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