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Investigation of the metastatic mechanism of gastric cancer focusing on Vasorin exhibiting cytokine-dependent expression changes

Research Project

Project/Area Number 23K14596
Research Category

Grant-in-Aid for Early-Career Scientists

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

Principal Investigator

Yasuda Yoko  九州大学, 医学研究院, 助教 (80788779)

Project Period (FY) 2023-04-01 – 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 2024: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2023: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywordsがん転移 / Vasorin / 細胞遊走能 / 胃がん / EMT / 上皮間葉転換 / サイトカイン / 膜タンパク質
Outline of Research at the Start

上皮間葉転換(EMT)は転移の契機となる現象と推定されるが、効果的な治療薬はまだ存在せず、また、TGF-β1はEMTを誘導することが分かっている。申請者は新規標的分子を検索するため、公共データベースを活用してアンバイアスにVasorinを見出し、胃がん患者の生存期間と関連することを検証した。さらに予備実験により、Vasorin発現がサイトカインのバランスに依存して変動することを明らかにした。しかし、VasorinのEMTにおける機能は未解明である。本研究は、TGF-β1誘導のVasorin 発現がEMTの形質獲得および機能に影響するか明らかにし、新たな転移予防の分子として可能性を検証する。

Outline of Final Research Achievements

Gastric cancer remains one of the leading causes of cancer-related deaths worldwide, largely due to its high metastatic potential. In this study, I focus on Vasorin/slit-like2, a type I transmembrane protein identified through expression screening. First, I demonstrated that Vasorin expression is induced by TGF-β1 in gastric cancer cells at the transcriptional and protein levels, and it also increases fibronectin, a mesenchymal marker. A previous report showed that Vasorin downregulates TGF-β signaling by trapping TGF-β1. However, this is the first report to show that Vasorin is upregulated by TGF-β1. Second, to evaluate the role of Vasorin in cellular migration, I performed transwell migration assays. Interestingly, cells with repressed Vasorin expression showed significantly reduced migration in the presence of TGF-β1. Furthermore, I found that the combination of TGF-β1 and IFN-γ accelerates cellular migration, even though IFN-γ is generally considered an anti-tumor cytokine.

Academic Significance and Societal Importance of the Research Achievements

本研究は、環境因子として炎症サイトカインを採用し、Ⅰ型膜タンパク質のVasorinに着目して、胃がん転移の分子機構の解明を目的とした。胃がん細胞において、TGF-β1誘導性Vasorinが細胞遊走能に機能することは先行研究になく、新規の知見である。この成果は、サイトカインのバランスが転移の契機になる可能性を示唆し、がん進展の過程に関する理解を深め、転移抑制を目指す新たな治療戦略の開発に学術的貢献を果たす。また、臨床応用への可能性を広げ、治療成績の向上と患者QOLの改善に寄与する点で、高い社会的意義を有すると考える。

Report

(3 results)
  • 2024 Annual Research Report   Final Research Report ( PDF )
  • 2023 Research-status Report
  • Research Products

    (2 results)

All 2025 2024

All Presentation (2 results) (of which Int'l Joint Research: 1 results)

  • [Presentation] Vasorin/slit-like 2 protein is induced by transforming growth factor-beta 1 through TRPV4 signaling and accelerates cellular migration in gastric cancer cells2025

    • Author(s)
      Yoko Yasuda
    • Organizer
      13th AACR-JCA Joint Conference
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Vasorin/slit-like 2 induced by TGF-b1 signaling accelerates cellular migration in gastric cancer cells2024

    • Author(s)
      安田 洋子
    • Organizer
      第47回日本分子生物学会
    • Related Report
      2024 Annual Research Report

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Published: 2023-04-13   Modified: 2026-01-16  

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