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Identification of pathogenic antigen-presenting cells and therapeutic targets in inflammatory skin diseases.

Research Project

Project/Area Number 21K16211
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 53050:Dermatology-related
Research InstitutionKyoto University

Principal Investigator

Nakamizo Satoshi  京都大学, 医学研究科, 特定講師 (30769740)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2021: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Keywordsアトピー性皮膚炎 / 尋常性乾癬 / 樹状細胞 / マクロファージ / 1細胞RNAシークエンス / 乾癬 / 抗原提示細胞
Outline of Research at the Start

アトピー性皮膚炎や尋常性乾癬などの慢性炎症性皮膚疾患では、皮膚内の抗原提示細胞が炎症の方向付け、病態形成に重要である。しかしながら、慢性炎症性皮膚疾患に重要な抗原提示細胞の実体は、未だに明確にされていない。本研究の目的は、アトピー性皮膚炎と尋常性乾癬における病原性抗原提示細胞を世界に先駆けて同定し、その性質を解明することである。本研究では、抗原提示細胞の同定と性質解析により、皮膚における炎症の病的活性化メカニズムの一端に迫ると同時に、慢性炎症性皮膚疾患治療の新たな治療標的を同定する。

Outline of Final Research Achievements

Flow cytometry analysis combined with one-cell RNA sequencing analysis was used to classify human cutaneous dendritic cells into four populations, DC1, DC2, DC3 and activated DC, and macrophages into three populations, CCR1-positive, MARCO-positive and TREM2-positive macrophages. Activated DCs were increased in both atopic dermatitis and psoriasis and produced IL-15, which is important for dermatitis; DC3 were increased only in psoriasis and produced IL-1B and IL-23A, which are essential for the development of psoriasis; TREM2-positive DCs were increased in psoriasis and produced IL-15, which is important for psoriasis; TREM3-positive DCs were increased in atopic dermatitis and produced IL-15, which is important for psoriasis. These results suggest that newly identified activated DCs and DC3 may play a pivotal role in inflammatory skin diseases.

Academic Significance and Societal Importance of the Research Achievements

学術的な意義として、1.細胞RNAシークエンス解析とフローサイトメトリー解析を組み合わせ、皮膚の抗原提示細胞分画を詳細に解析したこと、2.新たに同定された活性化DCとDC3が皮膚炎症に重要な役割を担っている可能性を示したことが挙げられる。これらの知見は、皮膚免疫システムの理解を大きく進展させ、炎症性皮膚疾患の病態解明につながる可能性がある。
社会的な意義としては、この研究成果が新規治療薬開発につながる可能性が考えられる。また、皮膚の免疫システムの理解を深めることで、皮膚がんや感染症などの皮膚疾患への応用も期待できる。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (5 results)

All 2022 2021 Other

All Int'l Joint Research (1 results) Journal Article (1 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (3 results) (of which Invited: 3 results)

  • [Int'l Joint Research] A*STAR(シンガポール)

    • Related Report
      2021 Research-status Report
  • [Journal Article] Single-cell analysis of human skin identifies CD14+ type 3 dendritic cells co-producing IL1B and IL23A in psoriasis2021

    • Author(s)
      Nakamizo Satoshi、Kabashima Kenji、Ginhoux Florent、et al.
    • Journal Title

      Journal of Experimental Medicine

      Volume: 218 Issue: 9

    • DOI

      10.1084/jem.20202345

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Single-cell analysis of inflammatory skin diseases identifies the new subpopulations of antigen presenting cells in human2022

    • Author(s)
      中溝聡
    • Organizer
      第75回日本細胞生物学会大会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] Single cell RNA sequencing of antigen-presenting cells in inflammatory skin diseases2022

    • Author(s)
      中溝聡
    • Organizer
      第51回日本免疫学会学術集会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] Single cell RNA analysis of antigen-presenting cells in inflammatory skin diseases2022

    • Author(s)
      中溝聡
    • Organizer
      第96回日本薬理学会年会
    • Related Report
      2022 Research-status Report
    • Invited

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Published: 2021-04-28   Modified: 2025-01-30  

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