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Chromosomal instability in colorectal cancer

Research Project

Project/Area Number 20K09061
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 55020:Digestive surgery-related
Research InstitutionFukushima Medical University

Principal Investigator

Hayase Suguru  福島県立医科大学, 医学部, 博士研究員 (00583387)

Co-Investigator(Kenkyū-buntansha) 岡山 洋和  福島県立医科大学, 医学部, 講師 (20583397)
坂本 渉  福島県立医科大学, 医学部, 講師 (40622337)
Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2022: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Keywords大腸癌 / 染色体不安定性 / CIN / MSS
Outline of Research at the Start

大腸癌の多段階発癌に伴い、染色体不安定性(chromosomal instability: CIN)は増強し、またCINは癌進展を促進する。本課題は、CINを示す約85%の大腸癌(MSS/CIN)を対象に、腺腫形成・癌化・進展・転移過程で生じる染色体の欠失に着目する。CINを制御する遺伝子の不活化がCINのdriverとなると考えており、その同定と機能的検証、臨床的意義の解明を目的とする。bioinformaticsを用いた網羅的な遺伝子変異/コピー数 (増幅/欠失) /発現など多層データの統合解析と機能的検証を軸としており、癌進展の中心機構であるCINの理解と応用に知見をもたらすと考える。

Outline of Final Research Achievements

Colorectal cancer (CRC) exhibits either microsatellite instability (MSI) or chromosomal instability (CIN), with the latter typically being microsatellite stable (MSS). The purpose of this study was to identify novel cancer-associated genes whose expression is downregulated due to chromosomal deletions particularly in MSS/CIN CRC and to analyze their clinicopathological significance and functions. Based on comprehensive screening conducted on gene expression and copy number analysis datasets of adenomas, CRCs, and CRC cell lines, we identified a set of candidate genes. These genes were found to be downregulated in association with chromosomal-level deletions as cancer progressed, and this downregulation was related to poor prognosis. However, siRNA-mediated silencing using CRC cell lines demonstrated no clear functional significance.

Academic Significance and Societal Importance of the Research Achievements

多くの大腸癌は染色体不安定性を示し、染色体不安定性は発癌・進展の過程で増加していく。本研究では、染色体不安定性を示す大腸癌において、特定の染色体の欠失とそれに関連する遺伝子発現低下、さらにその臨床的意義を示すことができた。大腸癌の発癌・進展におけるそれら遺伝子の生物学的機構の解明や、大腸癌治療の個別化を目指す今後の癌研究の礎として寄与し得ると考える。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (4 results)

All 2023 2021 2020

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

  • [Journal Article] SH2D4A downregulation due to loss of chromosome 8p is associated with poor prognosis and low T cell infiltration in colorectal cancer2021

    • Author(s)
      Matsumoto Takuro、Okayama Hirokazu、Nakajima Shotaro、Saito Katsuharu、Ito Misato、Kaneta Akinao、Kanke Yasuyuki、Onozawa Hisashi、Hayase Suguru、Fujita Shotaro、Sakamoto Wataru、Saito Motonobu、Seze Zenichiro、Momma Tomoyuki、Mimura Kosaku、Kono Koji
    • Journal Title

      British Journal of Cancer

      Volume: 126 Issue: 6 Pages: 917-926

    • DOI

      10.1038/s41416-021-01660-y

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Molecular subtypes of colorectal cancer2023

    • Author(s)
      岡山洋和, 片方雅紀, 佐藤孝洋, 深井智司, 佐久間芽衣, 松本拓朗, 遠藤英成, 氏家大輔, 小野澤寿志, 藤田正太郎, 坂本渉, 齋藤元伸, 佐瀬善一郎, 門馬智之, 中嶋正太郎, 三村耕作, 河野浩二
    • Organizer
      第123回日本外科学会定期学術集会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 大腸癌における染色体8p上の遺伝子SH2D4Aの不活化2021

    • Author(s)
      松本拓朗, 岡山洋和, 中嶋正太郎, 齋藤勝治, 菅家康之, 小野澤寿志, 藤田正太郎, 坂本渉, 齋藤元伸, 佐瀬善一郎, 門馬智之, 三村耕作, 河野浩二
    • Organizer
      第59回日本癌治療学会学術集会
    • Related Report
      2021 Research-status Report
  • [Presentation] Chromosomal instability causes deletion of tumor suppressor genes in colorectal cancer2020

    • Author(s)
      岡山洋和, 遠藤英成, 加瀬晃志, 山内直人, 松本拓朗, 早瀬傑, 藤田正太郎, 遠藤久仁, 坂本渉, 齋藤元伸, 佐瀬善一郎, 門馬智之, 三村耕作, 大木進司, 河野浩二.
    • Organizer
      第120回日本外科学会定期学術集会
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2025-01-30  

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