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Analysis of the role of AhR in advanced cutaneous squamous cell carcinoma

Research Project

Project/Area Number 20K17336
Research Category

Grant-in-Aid for Early-Career Scientists

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

Principal Investigator

Hidaka Takanori  東北大学, 東北メディカル・メガバンク機構, 助教 (80781575)

Project Period (FY) 2020-04-01 – 2025-03-31
Project Status Completed (Fiscal Year 2024)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
KeywordsAhR / 皮膚扁平上皮癌 / 好中球 / Ah受容体 / 扁平上皮癌
Outline of Research at the Start

皮膚扁平上皮癌 (cutaneous squamous cell carcinoma: cSCC)は有病率の高いがん腫であるが、進行期における有効な加療法はいまだ見つかっていない。Aryl hydrocarbon receptor (AhR)はcSCCの誘因とされる紫外線や環境汚染物質を感知する分子であるが、近年AhRの変異とcSCCの有病率との間に強い関連があることが報告された。本研究ではAhRがcSCCの進行に与える役割を解析することで、cSCCの悪性化機序ひいては有効な加療法につながる知見を得ることを目指す。

Outline of Final Research Achievements

AhR is a ligand-activated transcription factor that induces enzymes like CYP1A1. GWAS have identified AhR as a risk gene for cutaneous squamous cell carcinoma (cSCC), with advanced tumors showing elevated CYP1A1; however, its role in progression remains unclear. We employed tamoxifen-inducible, epidermis-specific AhR knockdown mice in a DMBA carcinogenesis model to recapitulate cSCC development. Tamoxifen was administered post-induction to assess the impact of AhR suppression during progression. RNA sequencing of full-thickness skin from wild-type mice 6 weeks post-induction revealed upregulation of pathways for neutrophil migration and proteolytic activity compared to controls. In addition, comparisons with AhR knockdown mice demonstrated that AhR suppresses serine protease inhibitor genes while promoting leukocyte activation. These results suggest that epidermal AhR activation may drive cSCC progression via neutrophil activation, underscoring its potential as a therapeutic target.

Academic Significance and Societal Importance of the Research Achievements

皮膚扁平上皮癌は初期の段階では切除にて根治が可能であるが、進行してしまうと加療が困難な疾患である。皮膚扁平上皮癌の進行には浸潤している好中球の活性化が関与しているが、本研究により腫瘍細胞のAhRがセリンプロテアーゼインヒビターの産生を抑制しており、同抑制が好中球の浸潤および活性化に寄与している可能性が示唆された。AhRはリガンド結合型の受容体型転写因子であり、活性をリガンド投与により操作可能であることから、皮膚扁平上皮癌の進行に対する治療標的となり得る。

Report

(6 results)
  • 2024 Annual Research Report   Final Research Report ( PDF )
  • 2023 Research-status Report
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (3 results)

All 2021 2020

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 2 results)

  • [Journal Article] Chronological changes of skin eruptions toward cold abscess formation in hyper‐immunoglobulin E syndrome2021

    • Author(s)
      Fukui Reimu、Hidaka Takanori、Terui Hitoshi、Rikiishi Takeshi、Sasahara Yoji、Kagimoto Yoshiko、Kusakari Yoshiyuki、Yamasaki Kenshi、Aiba Setsuya
    • Journal Title

      The Journal of Dermatology

      Volume: 48 Issue: 7

    • DOI

      10.1111/1346-8138.15886

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Plasminogen Activating Inhibitor-1 Might Predict the Efficacy of Anti-PD1 Antibody in Advanced Melanoma Patients.2021

    • Author(s)
      Ohuchi K, Kambayashi Y, Hidaka T, Fujimura T
    • Journal Title

      Front Oncology

      Volume: 11 Pages: 798385-798385

    • DOI

      10.3389/fonc.2021.798385

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Environmental pollutants and the immune response2020

    • Author(s)
      Suzuki Takafumi、Hidaka Takanori、Kumagai Yoshito、Yamamoto Masayuki
    • Journal Title

      Nature Immunology

      Volume: 21 Issue: 12 Pages: 1486-1495

    • DOI

      10.1038/s41590-020-0802-6

    • NAID

      40022683384

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access

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Published: 2020-04-28   Modified: 2026-01-16  

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