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Functional analysis of the inhibitor for epithelial-mesenchymal transition on oral cancer stem cells towards the development of new cancer treatments

Research Project

Project/Area Number 19K10274
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 57060:Surgical dentistry-related
Research InstitutionTokyo Medical University

Principal Investigator

Watanabe Masato  東京医科大学, 医学部, 兼任准教授 (40349460)

Co-Investigator(Kenkyū-buntansha) 河野 通秀  東京医科大学, 医学部, 講師 (00421066)
古賀 陽子  東京医科大学, 医学部, 兼任教授 (10392408)
近津 大地  東京医科大学, 医学部, 主任教授 (30343122)
Project Period (FY) 2019-04-01 – 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 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywords口腔扁平上皮癌 / がん幹細胞 / 上皮間葉転換 / ユビキチンリガーゼ / microRNA / Fbxw7 / 口腔がん幹細胞
Outline of Research at the Start

がん治療の成否はがん幹細胞の治療抵抗性に特徴づけられている。私たちはこれまで口腔扁平上皮癌におけるがん幹細胞の存在に注目し、その発現様式および薬剤感受性の制御機構について解析を進めて来た。本研究では、これまでの研究をさらに発展させ、がん幹細胞の1つの表現とされる上皮間葉転換に焦点を当て、腫瘍実質より間葉系に変化する幹細胞を特定し、上皮間葉転換抑制因子を解明する。また、がん幹細胞ポピュレーションより抑制因子を標的とするバイオマーカーを分子レベルで特定する。それらの成果により、治療感受性の向上につながるより精度の高い新たながん治療戦略の構築を目指す。

Outline of Final Research Achievements

The success or failure of cancer treatment is characterized by the resistance of cancer stem cells to therapy. Elucidating epithelial-mesenchymal transition, which is considered to be one of the characteristics of cancer stem cells, will provide clues for controlling drug sensitivity. Therefore, we attempted to identify epithelial-mesenchymal transition stem cells from oral squamous cell carcinoma tissue and to elucidate the presence of ubiquitin ligase (Fbxw7), an epithelial-mesenchymal transition inhibitor. This study examines the negative effect of Fbxw7 on epithelial-mesenchymal transition at a basic level. As a result, epithelial-mesenchymal transition type stem cells were speculated at the tissue level, however their characteristics, drug resistance or significant negative effects of Fbxw7 on epithelial-mesenchymal transition were unknown. There were no molecular biomarkers targeted to Fbxw7.

Academic Significance and Societal Importance of the Research Achievements

本研究の特色として、抗腫瘍性の直接的な新規薬物開発に関連するものではない。がん幹細胞の薬剤抵抗性に焦点をあて、いかにがん幹細胞の感受性を高めるかその因子の解明あるいはそれに関連したバイオマーカーの解明を試みた研究である。これまでの抗がん剤あるいは分子標的剤は各増殖期に相応し効果を発揮するが、感受性が低いG0期のがん幹細胞は対象外であった。その為、G0期へ移行を阻止する因子の解明は、薬物療法を補完する観点で興味深い研究であった。

Report

(6 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (2 results)

All 2020 2019

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

  • [Journal Article] Preauricular solitary fibrous tumor: A case report of uncommon neoplasm arising from the facial region2020

    • Author(s)
      Masato Watanabe, Michihide Kono, On Hasegawa, Yoko Kawase-Koga, Daichi Chikazu, Ai Enomoto, Toshitaka Nagao
    • Journal Title

      Journal of Oral and Maxillofacial Surgery, Medicine, and Pathology

      Volume: 32 Issue: 3 Pages: 195-199

    • DOI

      10.1016/j.ajoms.2019.11.008

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Follicular lymphoid hyperplasia of the posterior maxillary site presenting as uncommon entity: a case report and review of the literature2019

    • Author(s)
      Masato Watanabe, Ai Enomoto, Yuya Yoneyama, Michihide Kono, On Hasegawa, Yoko Kawase-Koga, Takafumi Satomi, Daichi Chikazu
    • Journal Title

      BMC Oral Health

      Volume: 19 Issue: 1 Pages: 1-11

    • DOI

      10.1186/s12903-019-0936-9

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access

URL: 

Published: 2019-04-18   Modified: 2025-01-30  

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