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A mouse model for postinflammatory hyperpigmentation: an analysis of molecular, and histological traits, and an establishment of effective treatment.

Research Project

Project/Area Number 19K08742
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 53050:Dermatology-related
Research InstitutionYamagata University

Principal Investigator

Suzuki Tamio  山形大学, 医学部, 教授 (30206502)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywordsモデルマウス / アトピー性皮膚炎 / メラニン代謝 / マクロファージ / メラニン / 炎症後色素沈着 / 肥満細胞 / ヒスタミン / melanin / melanocyte / inflammation / mouse / pigmentation
Outline of Research at the Start

患者のQOLを著しく低下させる露出部の炎症後色素沈着(PIH)について、我々は独自で開発したヒト型皮膚を持つ遺伝子改変マウス(hk14SCF Tg-HRMマウス)を使用して、PIHモデルマウスを作成し、その病態解析を集学的に行うとともに、病態に基づいた新規治療法の開発とこれまでの既存の治療法についてその有効性を検証する。

Outline of Final Research Achievements

Although post-inflammatory hyperpigmentation (PIH) in exposed areas significantly reduces the patient's quality of life, its pathology has not been analyzed and no effective treatment has been established. Therefore, we established a PIH model mouse using a transgenic mouse (hk14SCF Tg-HRM mouse) with human-like skin, and analyzed the pathophysiology of PIH with chemical, immunohistological, and electron microscopic methods. The results showed that the main cause of PIH was the slow metabolism of melanin dropped on the dermis, in which a subpopulation of macrophages would play a central role in its metabolism.
It is expected that the establishment of our PIH model mouse will trigger the dramatic development of PIH research in the future.

Academic Significance and Societal Importance of the Research Achievements

アトピー性皮膚炎などの各種皮膚炎症性疾患において、まずはその炎症をコントロールすることが重要であるが、病勢が治まったのちに残る炎症後の色素沈着(PIH)については、有効な治療法もない。顔面や頚部、手背等の露出部位に見られるPIHは、患者のQOLを著しく低下させ、時には社会活動も大きく障害する。特に若年者においては、健全な精神的発育を阻害することすらありうる。本研究の大きな成果であるPIHモデル動物の確立は、PIHの病態解明を飛躍的に躍進させ、今後の新規治療法の確立の大きな原動力になりうると考えられる。

Report

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

    (5 results)

All 2021 2020 2019

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (4 results) (of which Int'l Joint Research: 1 results,  Invited: 2 results)

  • [Journal Article] Establishment of a mouse model for post‐inflammatory hyperpigmentation2020

    • Author(s)
      Nakano Shoko、Abe Yuko、Nakajima Kimiko、Sano Shigetoshi、Yamamoto Osamu、Wakamatsu Kazumasa、Ito Shosuke、Hayashi Masahiro、Suzuki Tamio
    • Journal Title

      Pigment Cell & Melanoma Research

      Volume: 34 Issue: 1 Pages: 101-110

    • DOI

      10.1111/pcmr.12911

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] 色素異常症に関わる最近の話題:色白、白斑、色素斑2021

    • Author(s)
      鈴木民夫
    • Organizer
      日本皮膚科学会長崎地方会第345回例会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 炎症後色素沈着症のモデル動物の確立2020

    • Author(s)
      中野祥子、阿部優子、中島喜美子、佐野栄紀、山元修、若松一雅、伊藤祥輔、林昌浩、鈴木民夫
    • Organizer
      第50回日本皮膚免疫アレルギー学会総会学術大会
    • Related Report
      2020 Research-status Report
  • [Presentation] Establishment of a mouse model for post-inflammatory pigmentation (PIH)2019

    • Author(s)
      Shoko Nakano, Yuko Abe, Yutaka Hozumi, Tamio Suzuki, Kimiko Nakajima, Shigetoshi Sano, Osamu Yamamoto
    • Organizer
      The 44th annual meeting of the Japanese Society for investigative Dermatology
    • Related Report
      2019 Research-status Report
  • [Presentation] 48.Analysis of post-inflammatory hyperpigmentation (PIH) using a new model mouse.2019

    • Author(s)
      Tamio Suzuki
    • Organizer
      20th Hamchun Dermatology Symposium,
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited

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

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