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Eosinophil-specific autoantibodied in patients with eosinophilic pneumonia

Research Project

Project/Area Number 19K17689
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 53030:Respiratory medicine-related
Research InstitutionUniversity of Occupational and Environmental Health, Japan

Principal Investigator

Kawabata Hiroki  産業医科大学, 医学部, 助教 (80649054)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
KeywordsEosinophil / Autoantibody / autoantibody / eosinophil
Outline of Research at the Start

慢性好酸球性肺炎は原因不明の好酸球性肺疾患である。好酸球は白血球の一種で、好酸性の顆粒を有しており、アレルギー疾患の病態に重要な役割を果たすとされている。
慢性好酸球性肺炎には副腎皮質ステロイドが有効だが半数で再発を認め、終生ステロイドの内服が必要となる患者が存在し、病態の解明が望まれている。近年気管支喘息などアレルギー疾患においては好酸球に対する自己抗体の関与が示唆されており、今回われわれは慢性好酸球性肺炎患者の血清中の好酸球に対する自己抗体を検索して慢性好酸球性肺炎の疾患マーカーとなるような自己抗体の検索を試みる。自己抗体の検索法として、免疫沈降法、酵素抗体法、間接蛍光抗体法を用いる。

Outline of Final Research Achievements

Chronic eosinophilic pneumonia is an eosinophilic lung disease of unknown cause. It is associated with a high rate of asthma and other allergic diseases and responds markedly to corticosteroids, although 30-50% of patients relapse following tapering/withdrawal of steroids. There are no known markers that reflect the onset or disease course of chronic eosinophilic pneumonia. In this study, we used various methods to detect autoantibodies that may serve as disease markers for chronic eosinophilic pneumonia. Although we were unable to detect disease-specific autoantibodies in this study, we were able to establish an immunoprecipitation method using AML14.3D10 cell ines, which are derived from human acute myelogenous leukemia cells. We believe that this method can be used to detect disease-specific autoantibodies in chronic eosinophilic pneumonia in the future.

Academic Significance and Societal Importance of the Research Achievements

本邦において増加の一途にあるアレルギー疾患の診断・治療のためには疾患特異的なマーカーの発見が急務である。今回我々は原因不明のアレルギー疾患である慢性好酸球性肺炎の疾患マーカーの候補として好酸球に対する自己抗体に注目し、血液中の自己抗体の検出を試みた。現状では疾患特異的自己抗体の特定に至っていないが、ヒト好酸球性白血病細胞株であるAML14.3D10を用いた自己抗体検出法を確立できた。この手法により今後疾患特異的な自己抗体が同定されれば、慢性好酸球性肺炎を含めたアレルギー疾患の病態解明につながる可能性があると考えている。

Report

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

    (2 results)

All 2021 2019

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (1 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Development of rheumatoid arthritis in a patient with refractory chronic eosinophilic pneumonia during anti-interleukin 5 therapy2021

    • Author(s)
      Kawabata H, Satoh M, Yatera K.
    • Journal Title

      J Asthma Allergy

      Volume: 14 Pages: 1425-30

    • DOI

      10.2147/jaa.s342993

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Clinical significance of serum autoantibodies in patients with sarcoidosis.2019

    • Author(s)
      川端宏樹
    • Organizer
      第39回日本サルコイドーシス肉芽腫性疾患学会総会・世界サルコイドーシス学会合同
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research

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

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