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Regulatory mechanism and function of Rif small GTPase in cancer cell migration

Research Project

Project/Area Number 21K15365
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 48040:Medical biochemistry-related
Research InstitutionFukushima Medical University

Principal Investigator

Hoshi Kyoka  福島県立医科大学, 医学部, 博士研究員 (00726995)

Project Period (FY) 2021-04-01 – 2025-03-31
Project Status Completed (Fiscal Year 2024)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2023: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2022: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords低分子量Gタンパク質 / がん細胞浸潤 / がん転移 / Rif / Ror1 / 肺腺がん / 核膜 / Rhoファミリー / SmgGDS / GDP-GTP交換因子 / 癌細胞遊走 / 糸状突起
Outline of Research at the Start

細胞の糸状突起は、細胞遊走においてガイダンス因子を感知するアンテナとして機能する他、細胞外基質との接着を介して遊走の足場を形成したり細胞外基質を再構築する機能を担っている。低分子量Gタンパク質Rifは肺癌細胞などにおいて過剰発現し、癌細胞に糸状突起形成に誘導することで癌細胞遊走を制御していることが示唆されている。しかし、Rifの活性や機能がどのように制御されているのかは明らかでない。本研究では、癌細胞におけるRifの活性制御機構と癌細胞遊走における機能を明らかにすることにより、癌浸潤・転移のメカニズム解明を目指す。

Outline of Final Research Achievements

In this study, we elucidated the activity and intracellular function of Rif, a protein that regulates cancer cell migration, and found that Rif is involved in cell migration through the formation of filopodia and that its membrane localization is regulated by its binding to a protein called SmgGDS. On the other hand, although the activity of Rif remained constantly high, SmgGDS is not involved in regulating its activity in the cell. Our results also showed that Rif also localizes to the nucleus and affects nuclear membrane structure, and that high expression of Rif and Ror1 is associated with progression and metastasis in lung adenocarcinoma.

Academic Significance and Societal Importance of the Research Achievements

本研究では、がん細胞の移動や転移に関わるタンパク質Rifの細胞内での働きや制御機構を明らかにした。特に、Rifが細胞膜や核にどのように局在し、細胞の動きを制御しているか、またその調節因子としてSmgGDSがどのように関与しているかを詳細に解析した。その結果、Rifはがん細胞の膜や核膜の構造や機能に影響を与えること、さらにRifおよびSmgGDSの発現が肺がんの進行や転移と関連することが判明した。これらの知見は、がんの新たな診断マーカーや治療標的の開発に貢献する学術的・社会的意義を持つものである。

Report

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

    (4 results)

All 2023 2022 2021

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 3 results) Presentation (1 results)

  • [Journal Article] Rho family small GTPase Rif regulates Wnt5a-Ror1-Dvl2 signaling and promotes lung adenocarcinoma progression2023

    • Author(s)
      Nishita Michiru、Kamizaki Koki、Hoshi Kyoka、Aruga Kana、Nishikaku Ikumi、Shibuya Hiroshi、Matsumoto Kunio、Minami Yasuhiro
    • Journal Title

      Journal of Biological Chemistry

      Volume: 299 Pages: 105248~105248

    • DOI

      10.1016/j.jbc.2023.105248

    • Related Report
      2023 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Total transferrin in cerebrospinal fluid is a novel biomarker for spontaneous intracranial hypotension2021

    • Author(s)
      Iijima Junko、Hoshi Kyoka、Ito Hiromi、Kanno Mayumi、Murakami Yuta、Takahashi Koichi、Matsumoto Kana、Yamaguchi Yoshiki、Nakajima Madoka、Miyajima Masakazu、Arai Hajime、Kanai Mitsuyasu、Kitazume Shinobu、Honda Takashi、Hashimoto Yasuhiro
    • Journal Title

      FUKUSHIMA JOURNAL OF MEDICAL SCIENCE

      Volume: 67 Pages: 64~70

    • DOI

      10.5387/fms.2020-19

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Transferrin Biosynthesized in the Brain Is a Novel Biomarker for Alzheimer’s Disease2021

    • Author(s)
      Hoshi K, Ito H, Abe E, Fuwa TJ, Kanno M, Murakami Y, Abe M, Murakami T, Yoshihara A, Ugawa Y, Saito T, Saido TC, Matsumoto K, Yamaguchi Y, Furukawa K, Arai H, Kanai M, Miyajima M, Arai H, Ogawa N, Akatsu H, Hashizume Y, Tateno H, Honda T, Hashimoto Y.
    • Journal Title

      Metabolites

      Volume: 11 Pages: 616~616

    • DOI

      10.3390/metabo11090616

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Rif低分子量Gタンパク質の細胞内局在と機能の制御機構2022

    • Author(s)
      渡部祐亮、星京香、紙崎孝基、澁谷浩司、南康博、西田満
    • Organizer
      日本生化学会大会
    • Related Report
      2022 Research-status Report

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Published: 2021-04-28   Modified: 2026-01-16  

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