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A molecular mechanism of breast cancer cell-derived exosomes using protein-protein interactions

Research Project

Project/Area Number 19K16548
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 49020:Human pathology-related
Research InstitutionTohoku University

Principal Investigator

Iwabuchi Erina  東北大学, 医学系研究科, 助教 (70837278)

Project Period (FY) 2019-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2019: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords乳癌 / エクソソーム / 血管新生 / タンパク質間相互作用
Outline of Research at the Start

近年,癌細胞や間質の正常細胞から分泌されるエクソソームが癌の機能に関わることが報告されており,エクソソームの機能解析は乳癌の生物学的特徴を理解する際に重要である.これまで,エクソソーム研究は血清や尿などが用いられることが多く,病理組織標本上での発現意義を検討した研究はほとんど行われていない.そこで,本研究ではヒト乳癌組織におけるエクソソームマーカーの発現意義を検討する.さらに,エクソソームマーカーと細胞膜タンパクとのタンパク質間相互作用に着目し,その機能解析も実施する.本研究により,エクソソーム解析の乳癌病理診断における意義が明らかになることが期待される.

Outline of Final Research Achievements

In this study, we immunolocalized the exosome markers CD63, CD81, CD9 and Caveolin-1 in breast cancer tissues and then correlated the findings with microvessel density (MVD) evaluated by CD31 immunohistochemistry. In addition, the levels of CD9-positive cancer cells were also significantly higher in those with high proliferation marker protein Ki-67. We then demonstrated exosomes derived from Cav-1 knockdown-MDA-MB-231 cells increased HUEhT-1 tube formation. Our results indicated that exosome markers and Caveolin-1 positive cancer cells could be involved in clinically and biologically aggressive subtypes of breast cancer, suggesting that it may be involved in angiogenesis and cell proliferation.

Academic Significance and Societal Importance of the Research Achievements

癌細胞由来エクソソームは血清などを用いてその意義が広く検討されているが,本研究では,通常病理診断で用いられるホルマリン固定パラフィン包埋組織においてエクソソームマーカーの発現を検討し,癌細胞での発現が高い症例では血管新生が促進しており,より悪性度が高いことを示した.本研究により,エクソソームの新たな解析手法を提案し,また病理検査技術や治療法の開発にも寄与することが期待される.

Report

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

    (10 results)

All 2021 2020 2019

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (9 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] Heterogeneous Nuclear Ribonucleoprotein K Is Involved in the Estrogen-Signaling Pathway in Breast Cancer2021

    • Author(s)
      Iwabuchi E, Miki Y, Suzuki T, Hirakawa H, Ishida T, Sasano H
    • Journal Title

      Int J Mol Sci

      Volume: 22 Issue: 5 Pages: 2581-2581

    • DOI

      10.3390/ijms22052581

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Heterogeneous Nuclear Ribonucleoprotein K Is Involved In The Estrogen-Signaling Pathway.2021

    • Author(s)
      Erina Iwabuchi, Yasuhiro Miki, Kiyoshi Ito, Takanori Ishida, Hironobu Sasano
    • Organizer
      ENDO2021
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The zinc transporters, ZnT5 and ZnT6, in breast cancer.2020

    • Author(s)
      Erina Iwabuchi, Yasuhiro Miki, Takanori Ishida, Hironobu Sasano
    • Organizer
      American Association for Cancer Research Annual Meeting 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 乳癌におけるZinc transporter 5およびZinc transporter 6の発現意義2020

    • Author(s)
      岩渕英里奈,三木康宏,徐クン瑶,金井綾子,石田孝宣,笹野公伸
    • Organizer
      第28回日本乳癌学会学術総会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Heterogeneous nuclear ribonucleoprotein Kとエストロゲンシグナルに及ぼす影響の検討2020

    • Author(s)
      岩渕英里奈,三木康宏,伊藤潔,笹野公伸
    • Organizer
      第25回日本生殖内分泌学会学術集会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Heterogeneous nuclear ribonucleoprotein Kとエストロゲン受容体の相互作用に関する検討2020

    • Author(s)
      岩渕英里奈,三木康宏,笹野公伸
    • Organizer
      第61回日本組織細胞化学総会・学術集会
    • Related Report
      2020 Annual Research Report
  • [Presentation] The expression of carcinoembryonic antigen-related cell adhesion molecule 6 and 8 in breast cancer2019

    • Author(s)
      Iwabuchi E, Miki Y, Takagi K, Onodera Y, Shibahara Y, Ishida T, Sasano H
    • Organizer
      American Association for Cancer Research Annual Meeting 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] ホルモン依存性癌におけるホルモンシグナルの可視化2019

    • Author(s)
      三木康宏,岩渕英里奈,鈴木貴,笹野公伸,伊藤潔
    • Organizer
      第92回 日本内分泌学会学術総会
    • Related Report
      2019 Research-status Report
  • [Presentation] Visualization of estrogen receptor dimers in breast cancer cells2019

    • Author(s)
      Iwabuchi E, Miki Y, Sasano H
    • Organizer
      第92回 日本内分泌学会学術総会
    • Related Report
      2019 Research-status Report
  • [Presentation] 乳癌におけるタンパク質間相互作用の可視化と病理診断への応用に向けた検討2019

    • Author(s)
      岩渕英里奈,三木康宏,小野克彦,小野寺好明,金井綾子,宮下穣,鈴木貴,石田孝宣,笹野公伸
    • Organizer
      第16回 日本病理学会カンファレンス
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2022-01-27  

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