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The elucidation of molecular mechanism of maspin related with unfavorable prognosis of human breast cancer patients

Research Project

Project/Area Number 16K10458
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field General surgery
Research InstitutionTottori University

Principal Investigator

UMEKITA Yoshihisa  鳥取大学, 医学部, 教授 (80244226)

Co-Investigator(Kenkyū-buntansha) 坂部 友彦  鳥取大学, 医学部, 助教 (50639747)
Research Collaborator WAKAHARA makoto  
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords乳癌 / Maspin / 予後 / 上皮間葉転換 / 細胞内局在 / 浸潤 / EMT / 細胞浸潤 / 細胞増殖 / アンプリコンシークエンス / maspin
Outline of Final Research Achievements

Maspin is known to be a tumor suppressor gene. However, we revealed that cytoplasmic maspin (cytMaspin) expression was an indicator of poor prognosis in human breast cancer patients. Therefore, we investigate the function of cytMaspin in human breast cancer cells. Expression of maspin in MDA-MB-231 mainly exhibited a cytoplasmic localization, whereas that in MCF10A (normal mammary epithelial cells) exhibited nuclear and cytoplasmic localization. Maspin overexpression promoted cell invasion in MDA-MB-231, while downregulation of maspin induced the opposite effect.
To investigate how cytoplasmic maspin regulates cancer cell invasion, we focused on the EMT. In MDA-MB-231 overexpressing maspin, E-cadherin expression was decreased, while N-cadherin expression was increased. Furthermore, Maspin overexpression increased EMT-related transcription factors (Slug, Twist, ZEB1 and ZEBs2). CytMaspin may contributes to the regulation of cancer cell invasion via a process related with EMT.

Academic Significance and Societal Importance of the Research Achievements

本研究では、癌抑制遺伝子とされているMaspinが、ある種の乳癌培養細胞株において細胞質に発現しており、増殖能および浸潤能の亢進によって癌の進展に関与していることが示唆された。これらは、免疫組織化学を用いた我々の研究結果を支持するものであった。また、細胞質局在型Maspinの発現は、複数の上皮間葉転換関連遺伝子の発現と正の相関を示すことを見い出した。これらの結果より、乳癌における新たな治療標的分子同定の基礎研究発展に繋がることが期待できる。また、Maspinは乳癌のみならず様々な癌腫に発現していることから、他の癌腫に対しても応用可能な基盤研究となることが期待される。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (6 results)

All 2018 2017

All Journal Article (1 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results) Presentation (5 results)

  • [Journal Article] Subcellular Localization of Maspin Correlates with Histone Deacetylase 1 Expression in Human Breast Cancer.2017

    • Author(s)
      Wakahara M, Sakabe T, Kubouchi Y, Hosoya K, Hirooka Y, Yurugi Y, Nosaka K, Shiomi T, Nakamura H, Umekita Y.
    • Journal Title

      Anticancer Research

      Volume: 37 Pages: 5071-5077

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 乳癌細胞株におけるmaspin細胞内局在および機能解析2018

    • Author(s)
      坂部 友彦, 野坂 加苗, 梅北 善久
    • Organizer
      第107回日本病理学会総会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 細胞質局在maspinは、EMT関連遺伝子の発現を増加させ、乳癌における細胞浸潤を亢進させる2018

    • Author(s)
      坂部 友彦, 野坂 加苗, 梅北 善久
    • Organizer
      第77日本癌学会学術総会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Clinical Significance of Subcellular Localization of Maspin in Patients with Pathological Stage IALung Adenocarcinoma2018

    • Author(s)
      Ohno.T, Nozaka.Y, Fujiwara.W, Miyamoto.T, Kadonaga.T, Kidokoro.Y, Wakahara.M、Takagi.Y, Tanaka.Y, Haruki.T, Miwa.K, Suzuki.Y, Taniguchi.Y, Nakamura.H and Umekita.Y
    • Organizer
      IASLC 19th World Conference on Lung Cancer
    • Related Report
      2018 Annual Research Report
  • [Presentation] 細胞質に発現するmaspinは乳癌細胞株の浸潤能亢進によって癌の進展や悪性化に寄与する2017

    • Author(s)
      坂部友彦、若原誠、野坂加苗、塩見達志、梅北善久
    • Organizer
      第106回日本病理学会総会
    • Related Report
      2017 Research-status Report
  • [Presentation] 乳癌におけるMaspinの細胞内局在とHDAC1発現との関連性の検討2017

    • Author(s)
      若原誠、窪内康晃、坂部友彦、野坂加苗、塩見達志、梅北善久
    • Organizer
      第106回日本病理学会総会
    • Related Report
      2017 Research-status Report

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Published: 2016-04-21   Modified: 2020-03-30  

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