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Investigation on type I IFN signal regulation by STAT4 -toward elucidation of SLE pathogenesis-

Research Project

Project/Area Number 17K09997
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Collagenous pathology/Allergology
Research InstitutionThe University of Tokyo

Principal Investigator

Iwasaki Yukiko  東京大学, 医学部附属病院, 助教 (30592935)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2018: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords全身性エリテマトーデス / STAT4 / type I IFN / B cell / SLE / SNPs / B細胞 / インターフェロンシグナル / 活性酸素 / STAT1 / Toll like receptor
Outline of Final Research Achievements

SLE is a prototype of systemic autoimmune diseases. Although over 50 SNPs have been reported, the precise contributions to the pathogenesis remain unclear. At the beginning of this study, I focused on the role of STAT4, a famous signal transducer, in view of type I IFN signaling, but I faced some difficulties in proceeding my project by conventional molecular biology methods especially using human samples.
I changed my strategy to using RNA-seq analysis from each immune cell subset of our SLE and HC cohorts. Memory B cell importance for the pathogenesis was revealed and I also identified a specific molecule which seems to be a key player for SLE B cells.

Academic Significance and Societal Importance of the Research Achievements

SLEの病態形成において、type I interferon (IFN)シグナルの重要性は広く認識されているが、その詳細なメカニズムは未解明である。当初、疾患感受性遺伝子であるSTAT4について、type I IFN signalとの関わりから研究を開始したが、ヒト検体による検証の難しさが高い障壁となった。次いで、ヒト末梢血免疫担当サブセットのトランスクリプトーム解析により、メモリーB細胞における酸化的リン酸化の重要性を同定した。全ゲノムシークエンスと組み合わせた解析により、その制御に重要と想定される分子の同定に至った。新規治療戦略に繋がる学術的・社会的意義があると考えている。

Report

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

    (4 results)

All 2020 2019 2018 2017

All Presentation (4 results) (of which Invited: 1 results)

  • [Presentation] Multi-omics approaches to immune cell subsets in PBMCs reveal novel insights into type I IFN signature in SLE2020

    • Author(s)
      岩崎由希子
    • Organizer
      第3回日本免疫不全・自己炎症学会
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] Immune cell profiling of systemic lupus erythematosus reveals a key regulator of its pathogenesis and contributes to patient stratification2019

    • Author(s)
      中野正博
    • Organizer
      第48回日本免疫学会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Immune cell-type specific multi-omics analysis revealed contribution of mitochondria in B cells to systemic lupus erythematosus2018

    • Author(s)
      竹島 雄介
    • Organizer
      第47回日本免疫学会学術集会
    • Related Report
      2018 Research-status Report
  • [Presentation] STAT4によるtype I interferonシグナル制御機構の解析2017

    • Author(s)
      白井晴己
    • Organizer
      第4回内科学専攻大学院セミナー
    • Related Report
      2017 Research-status Report

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Published: 2017-04-28   Modified: 2021-02-19  

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