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Functional analysis of Kruppel-like factor 5 (KLF5) protein complex in colorectal cancer and its application to drug discovery

Research Project

Project/Area Number 19K16777
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 50010:Tumor biology-related
Research InstitutionJichi Medical University

Principal Investigator

Tsuji Kentaro  自治医科大学, 医学部, 助教 (00835712)

Project Period (FY) 2019-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
KeywordsKLF5 / 大腸癌 / モデルマウス / 蛋白間相互作用
Outline of Research at the Start

切除不能な進行大腸癌の予後は不良であり、高い有効性と安全性を持つ新規薬剤の開発が必要である。本研究では、大腸癌の発生において重要な機能を持つ転写因子であるKLF5に着目する。KLF5が正常な腸組織および大腸癌組織の中でどのように他の分子と相互作用しながら機能を果たしているかを明らかにし、KLF5と他の分子との結合を阻害する新しい大腸癌治療薬の開発に繋げることを目的とする。

Outline of Final Research Achievements

KLF5 is a transcription factor that plays an important role in the development of colorectal cancer. The better understanding of how KLF5 interacts with co-transcription factors or other molecules during the tumorigenesis of colorectal cancer could lead to the identification of novel druggable molecular pathways. In this study, we generated a mouse model of colorectal cancer expressing double-tagged KLF5 protein, which enable us to purify KLF5 protein complexes with higher specificity from tumor tissue-derived crude protein extracts.

Academic Significance and Societal Importance of the Research Achievements

特定の蛋白を精製するために一般に用いられる免疫沈降法では、目的とする蛋白以外の分子が反応に用いる抗体に非特異的に結合することが精製物の純度を下げる原因となる。特に、多彩な細胞や細胞外基質からなる生体組織に由来する蛋白粗抽出液は、とりわけ夾雑物の多さが蛋白精製の阻害要因となっていた。本研究で作製した大腸癌モデルマウスでは、精製の際の目印となるタグ蛋白がKLF5蛋白に2種類付加されている。このマウスの組織から蛋白を抽出し、各タグ蛋白に結合する2種類の抗体を用いた免疫沈降法を順次行うことで、より高い純度でのKLF5蛋白複合体精製が可能になることが期待される。

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 2023 2022

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

  • [Journal Article] RNA-binding protein 14 promotes phase separation to sustain prostate specific antigen expression under androgen deprivation in human prostate cancer2023

    • Author(s)
      Tsuji Kentaro、Kawata Hirotoshi、Kamiakito Tomoko、Nakaya Takeo、Tanaka Akira
    • Journal Title

      The Journal of Steroid Biochemistry and Molecular Biology

      Volume: 235 Pages: 106407-106407

    • DOI

      10.1016/j.jsbmb.2023.106407

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Development of Low-Molecular-Weight Compounds Targeting the Cancer-Associated KLF5 Transcription Factor2022

    • Author(s)
      Takeo Nakaya, Kenichi Aizawa, Yuki Taguchi, Kentaro Tsuji, Sachi Sekine, Kazuhiro Murakami, Masaji Kasai, Hirofumi Nakano, Yasumitsu Kondoh, Shingo Dan, Atsushi Yoshimori, Hiroyuki Kouji, Dai Takehara, Toru Suzuki, Hiroyuki Osada, Masayuki Murata, Akira Tanaka, and Ryozo Nagai
    • Journal Title

      ACS Med. Chem. Lett.

      Volume: 13 Issue: 4 Pages: 687-694

    • DOI

      10.1021/acsmedchemlett.1c00721

    • Related Report
      2021 Research-status Report
    • Peer Reviewed

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

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