• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Development of Novel Therapeutic Agents Targeting Regulatory Mechanisms of Cell Membrane Morphology for HER2-positive breast cancer

Research Project

Project/Area Number 19K18029
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 55010:General surgery and pediatric surgery-related
Research InstitutionEhime University

Principal Investigator

Murakami Akari  愛媛大学, 医学部附属病院, 助教(病院教員) (60722593)

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: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
KeywordsHER2陽性乳癌 / 細胞膜 / Rac1 / アルファスクリーン / タンパク質間相互作用 / CUL3 / 細胞膜形態変化
Outline of Research at the Start

HER2陽性乳癌は乳癌全体の約20%を占め、高い増殖能と転移能を有し予後不良である。HER2の機能を阻害する抗HER2医薬品はHER2陽性乳癌に著効するが耐性化が臨床上重大な問題となっている。そこで、本研究ではHER2陽性乳癌細胞の細胞膜形態制御機構を標的としたHER2陽性乳癌に対する新規分子標的薬のシーズ化合物の導出を狙う。具体的には申請者が最近発見したHER2陽性乳癌細胞の細胞膜形態制御機構に必須なユビキチンE3複合体の形成阻害剤をアルファスクリーンシステムにより探索する。同時に当該タンパク質複合体のヒトHER2陽性乳癌組織における発現と予後との相関を解析し、臨床的重要性を導出する。

Outline of Final Research Achievements

Although the HER2-targeted therapy is the first-line and effective therapy towards HER2-positive breast cancers, the development of drug resistance has been problematic. In addition, all the current anti-cancer drugs for HER2-positive breast cancer inhibit HER2. We have recently found that the ubiquitin E3 complex CUL3/KCTD10 is essential for cell growth through the constitutive degradation of RhoB specifically in HER2-positive breast cancer cells. In this study, we identified a RhoB-interacting protein which is essential for EGF-induced membrane ruffle formation as well as cell proliferation of HER2-positive breast cancer cells. By utilizing AlphaScreen, we also identified a couple of compounds which inhibit the CUL3/KCTD10 interaction leading to the inhibition of HER2-positive breast cancer cell growth

Academic Significance and Societal Importance of the Research Achievements

現行のHER2陽性乳癌に対する治療薬は、薬剤耐性の問題から、投与期間は限定的である。本研究ではHER2以外の分子基盤を創薬標的としているので、本研究を通して導出されたシーズ化合物は、抗HER2療法と併用して使用可能な新たなHER2陽性乳癌治療薬として、今後の開発が期待される。

Report

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

    (4 results)

All 2021

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

  • [Journal Article] CNKSR1 serves as a scaffold to activate an EGFR phosphatase via exclusive interaction with RhoB-GTP2021

    • Author(s)
      Nishiyama Kanako、Maekawa Masashi、Nakagita Tomoya、Nakayama Jun、Kiyoi Takeshi、Chosei Mami、Murakami Akari、Kamei Yoshiaki、Takeda Hiroyuki、Takada Yasutsugu、Higashiyama Shigeki
    • Journal Title

      Life Science Alliance

      Volume: 4 Issue: 9 Pages: e202101095-e202101095

    • DOI

      10.26508/lsa.202101095

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] A novel mechanism of phosphatase activation for EGFR by Cullin-3/KCTD10 ubiquitin E3 complex in HER-2-positive breast cancer cells.2021

    • Author(s)
      Ⅴ-1)Nishiyama K, Maekawa M, Murakami A, Utsunomiya K, Takemoto K, Kusakabe E, Noda H, Aoki R, Taguchi K, Yamashita M, Nakagita T, Nakayama J, Chosei M, Kiyoi T, Kamei Y, Takeda H, Takada Y, Higashiyama S
    • Organizer
      The 2021 San Antonio Breast Cancer Symposium
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] HER2陽性乳癌細胞株における恒常的なRhoBタンパク質分解の生理機能の解析2021

    • Author(s)
      Ⅶ-27)西山加那子、村上朱里、奥島久美子、竹本佳菜、日下部恵梨菜、志田原智広、野田令菜、青木玲奈、田口加奈、山下美智子、亀井義明、高田泰次
    • Organizer
      第29回日本乳癌学会学術総会
    • Related Report
      2021 Annual Research Report
  • [Presentation] HER2陽性乳癌細胞におけるEGFRフォスファターゼ活性化の新規メカニズム2021

    • Author(s)
      Ⅶ-44)西山加那子、前川大志、中山 淳、村上朱里、亀井義明、高田泰次、東山繁
    • Organizer
      第80回日本癌学会学術総会
    • Related Report
      2021 Annual Research Report

URL: 

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

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi