Visualization of Neutrophil Extracellular Traps and Fibrin Meshwork in Human Fibrinopurulent Inflammatory Lesions: I. Light Microscopic Study

• Shiogama Kazuya

  Department of Pathology, Fujita Health University School of Medicine

• Onouchi Takanori

  Department of Pathology, Fujita Health University School of Medicine

• Mizutani Yasuyoshi

  Department of Pathology, Fujita Health University School of Medicine

• Sakurai Kouhei

  Department of Diagnostic Pathology, Banbuntane-Houtokukai Hospital, Fujita Health University School of Medicine

• Inada Ken-ichi

  Department of Diagnostic Pathology, Banbuntane-Houtokukai Hospital, Fujita Health University School of Medicine

• Tsutsumi Yutaka

  Department of Pathology, Fujita Health University School of Medicine

抄録

Neutrophil extracellular traps (NETs) are extracellular fibrillary structures composed of degraded chromatin and granules of neutrophil origin. In fibrinopurulent inflammation such as pneumonia and abscess, deposition of fibrillar eosinophilic material is a common histopathological finding under hematoxylin-eosin staining. Expectedly, not only fibrin fibrils but also NETs consist of the fibrillar material. The aim of the present study is to analyze immunohistochemically how NETs are involved in the inflammatory process. Archival formalin-fixed, paraffin-embedded sections accompanying marked neutrophilic infiltration were the target of analysis. Neutrophil-associated substances (citrullinated histone H3, lactoferrin, myeloperoxidase and neutrophil elastase) were evaluated as NETs markers, while fibrinogen gamma chain was employed as a fibrin marker. Light microscopically, the fibrils were categorized into three types: thin, thick and clustered thick. Lactoferrin represented a good and stable NETs marker. Thin fibrils belonged to NETs. Thick fibrils are composed of either mixed NETs and fibrin or fibrin alone. Clustered thick fibrils were solely composed of fibrin. Neutrophils were entrapped within the fibrilllar meshwork of the thin and thick types. Apoptotic cells immunoreactive to cleaved caspase 3 and cleaved actin were dispersed in the NETs. In conclusion, NETs and fibrin meshwork were consistently recognizable by immunostaining for lactoferrin and fibrinogen gamma chain.

収録刊行物

• Ａｃｔａ　Ｈｉｓｔｏｃｈｅｍｉｃａ　ｅｔ　Ｃｙｔｏｃｈｅｍｉｃａ

  Ａｃｔａ　Ｈｉｓｔｏｃｈｅｍｉｃａ　ｅｔ　Ｃｙｔｏｃｈｅｍｉｃａ 49 (4), 109-116, 2016

  日本組織細胞化学会

キーワード

• neutrophil extracellular traps
• lactoferrin
• fibrinogen gamma chain
• apoptosis
• fibrinopurulent inflammation

詳細情報

• CRID: 1390001204860808960
• NII論文ID: 130005262535
• DOI: 10.1267/ahc.16015
• ISSN: 13475800
• ISSN: 00445991
• Web Site: https://www.jstage.jst.go.jp/article/ahc/49/4/49_16015/_pdf
• Web Site: https://search.jamas.or.jp/link/ui/2017326411
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可