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TGF-beta Signaling in fibrosis of recessive dystrophic epidermolysis bullosa

Research Project

Project/Area Number 20K08646
Research Category

Grant-in-Aid for Scientific Research (C)

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

Principal Investigator

Akasaka Eijiro  弘前大学, 医学研究科, 教授 (30436034)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2023: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2022: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords表皮水疱症 / 栄養障害型表皮水疱症 / VII型コラーゲン / TGF-beta / 線維化 / マトリックスメタロプロテイナーゼ / インテグリン / トロンボスポンディン-1 / 活性酸素
Outline of Research at the Start

劣性栄養障害型表皮水疱症 (RDEB)は皮膚の水疱・びらんを特徴とし最終的に重篤な線維化を呈する疾患である.一般に臓器の線維化は線維芽細胞のTGF-βシグナル活性化により生ずるが,RDEBの皮膚線維芽細胞におけるTGF-βシグナル活性化機構は明らかになっていない.本研究では,RDEBの重篤な線維化に対する新規治療法開発の基礎とするため,RDEB患者の皮膚線維芽細胞およびRDEBモデルマウス皮膚をもちいて,RDEB皮膚におけるTGF-βシグナル活性化機構を明らかにし,そのシグナルを阻害する物質を用いてRDEBの重篤な線維化を抑制できるかどうか検討することとした.

Outline of Final Research Achievements

In recessive dystrophic epidermolysis bullosa (RDEB), elevated TGF-beta signaling has been reported to drive devastating fibrosis. The exact knowledge of the individual contributions of keratinocytes and fibroblasts to dermal fibrotic response is crucial for development of improved disease-modulating therapies. We investigated the keratinocyte-fibroblast interaction on enhanced TGF-beta signaling in RDEB skin using fibroblasts and keratinocytes originating from RDEB donors. RDEB fibroblasts had an enhanced capacity to activate latent TGF-beta. Additionally, inhibition of thrombospondin-1 (TSP-1), matrix metalloproteinases (MMPs), and RGD-binding integrins, which are representative activators of latent TGF-beta, suppressed the TGF-beta signaling in RDEB fibroblasts. These results suggested the involvement of keratinocytes in initiating and progressing dermal fibrosis via TSP-1, MMPs, and RGD-binding integrins mediating keratinocytes-fibroblasts interaction.

Academic Significance and Societal Importance of the Research Achievements

本研究ではRDEBにおける線維化の治療ターゲットとしてLatent TGF-βの活性化抑制に着目し,MMP, インテグリン,トロンボスポンディン,ROSがRDEBFにおけるTGF-βシグナルを活性化させること,これらの阻害によりTGF-βシグナルおよび線維化関連蛋白の発現を抑制できると考えられ,RDEB線維化の新規治療法の発展につながる.さらにRDEBFをとりまく細胞外マトリックスは,癌の上皮間葉転換や浸潤・転移とも密接に関連しているため,この新規治療法が確立されれば,線維化のみならず,RDEBの最も重篤な合併症であるcSCCの進展を抑制できると考えられる.

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (15 results)

All 2023 2022 2021 2020 Other

All Int'l Joint Research (1 results) Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 3 results) Presentation (8 results) (of which Int'l Joint Research: 3 results,  Invited: 1 results) Book (2 results)

  • [Int'l Joint Research] University of Freiburg(ドイツ)

    • Related Report
      2020 Research-status Report
  • [Journal Article] A case of adult‐onset localized recessive dystrophic epidermolysis bullosa, harboring the novel COL7A1 mutation p.G2754E and the previously reported mutation p.R1763*2023

    • Author(s)
      Akasaka Eijiro、Rokunohe Daiki、Nakano Hajime、Yamatani Shingo、Sawamura Daisuke
    • Journal Title

      The Journal of Dermatology

      Volume: 51 Issue: 3

    • DOI

      10.1111/1346-8138.16993

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Two cases of the intermediate phenotype of recessive dystrophic epidermolysis bullosa harboring the novel COL7A1 mutation c.3570G>A2022

    • Author(s)
      Akasaka Eijiro、Nakano Hajime、Sawamura Daisuke
    • Journal Title

      Journal of Dermatological Science

      Volume: 106 Issue: 3 Pages: 193-195

    • DOI

      10.1016/j.jdermsci.2022.04.009

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Availability of mRNA Obtained from Peripheral Blood Mononuclear Cells for Testing Mutation Consequences in Dystrophic Epidermolysis Bullosa2021

    • Author(s)
      Akasaka E, Nakano H, Sawamura D
    • Journal Title

      International Journal of Molecular Science

      Volume: 22 Issue: 24 Pages: 13369-13369

    • DOI

      10.3390/ijms222413369

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Diversity of Mechanisms Underlying Latent TGF-b Activation in Recessive Dystrophic Epidermolysis Bullosa2020

    • Author(s)
      Akasaka E, Kleiser S, Sengle G, Bruckner-Tuderman L, Nystrom A
    • Journal Title

      Journal of Investigative Dermatolgoy

      Volume: - Issue: 6 Pages: 1450-1460

    • DOI

      10.1016/j.jid.2020.10.024

    • Related Report
      2021 Research-status Report 2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 口腔癌を合併したKindler症候群の1例2023

    • Author(s)
      赤坂英二郎, 中野 創, 澤村大輔
    • Organizer
      第43回水疱症研究会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 遺伝性水疱症の診断とその対応2023

    • Author(s)
      赤坂 英二郎
    • Organizer
      第123回日本皮膚科学会総会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 栄養障害型表皮水疱症における TGF-βシグナル活性化メカニズムの解明2023

    • Author(s)
      赤坂 英二郎
    • Organizer
      第10回皮膚の会.
    • Related Report
      2022 Research-status Report
  • [Presentation] Usefulness of mRNA Obtained from Peripheral Blood Mononuclear Cells to Analyze Consequences of Mutations in Epidermolysis Bullosa2022

    • Author(s)
      Eijiro Akasaka
    • Organizer
      The 47th Annual Meeting of the Japanese Society for Investigative Dermatology
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Availability of mRNA Obtained from Peripheral Blood Mononuclear Cells for Mutational Analysis in Dystrophic Epidermolysis Bullosa2022

    • Author(s)
      Eijiro Akasaka
    • Organizer
      The 51st Annual Meeting of the European Society for Dermatological Research
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Diversity of Mechanisms Underlying Dysregulating TGF-β Signaling in Recessive Dystrophic Epidermolysis Bullosa2021

    • Author(s)
      Akasaka E, Bruckner-Tuderman L, Nystrom A, Nakano H, Sawamura D
    • Organizer
      The 46th Annual Meeting of the Japanese Society for Investigative Dermatolgy
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] 栄養障害型表皮水疱症における TGF-βシグナリング活性化機構2021

    • Author(s)
      赤坂 英二郎, Alexander Nystrom, Leena Bruckner-Tuderman, 澤村 大輔
    • Organizer
      第42回水疱症研究会
    • Related Report
      2020 Research-status Report
  • [Presentation] Epidermal keratinocytes are involved in severe skin fibrosis of recessive dystrophic epidermolysis bullsoa2020

    • Author(s)
      Akasaka E, Bruckner-Tuderman L, Nystrom A
    • Organizer
      第34回 表皮細胞研究会
    • Related Report
      2020 Research-status Report
  • [Book] 皮膚疾患最新の治療2023-20242023

    • Author(s)
      高橋健造、佐伯秀久
    • Total Pages
      318
    • Publisher
      南江堂
    • ISBN
      9784524234226
    • Related Report
      2022 Research-status Report
  • [Book] 今日の治療指針 2022年版2022

    • Author(s)
      福井 次矢、高木 誠、小室 一成 総編集
    • Total Pages
      2224
    • Publisher
      医学書院
    • ISBN
      9784260047777
    • Related Report
      2022 Research-status Report

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Published: 2020-04-28   Modified: 2025-01-30  

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