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Chromosomal instability in colorectal cancer

Research Project

Project/Area Number 20K08963
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 55010:General surgery and pediatric surgery-related
Research InstitutionFukushima Medical University

Principal Investigator

Fujita Shotaro  福島県立医科大学, 医学部, 博士研究員 (20769640)

Co-Investigator(Kenkyū-buntansha) 岡山 洋和  福島県立医科大学, 医学部, 講師 (20583397)
芦澤 舞  福島県立医科大学, 医学部, 助教 (10791535)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Keywords大腸癌 / 染色体不安定性 / 免疫逃避 / 免疫抑制 / 免疫逃避機構
Outline of Research at the Start

当研究者らは、免疫抑制的腫瘍微小環境が、染色体不安定性 (Chromosomal instability: CIN)により誘導・促進されると考えており、背景にある染色体欠失と免疫制御遺伝子の不活化に着目し、その同定と機能的・臨床的検証を行うことを目的とする。種々の固形癌のなかでもCIN(+)/(-)の分類が明瞭である大腸癌を対象とし、網羅的遺伝子変異/コピー数 (増幅/欠失) /発現など多層データの統合とバイオマーカーへの展開、分子生物・免疫学的実験系を利用した機能的検証を軸としており、CINと免疫逃避機構をリンクさせ、免疫診療の個別化に寄与することが期待される。

Outline of Final Research Achievements

Colorectal cancer (CRC) is often characterized by chromosomal instability (CIN). In the present study, we investigated a set of candidate genes that are associated with tumor progression and immune suppression in CIN CRC, using multi-omics analysis, immunohistochemistry and in vitro functional assays. Among several candidates , we found that PAICS was significantly downregulated during tumor progression in CIN CRCs, potentially due to loss of chromosome 4 or chromosome arm 4q. Furthermore, we also demonstrated that the downregulation of this gene at transcriptional and protein levels was associated with poor survival outcomes. However, the functional roles of this gene remain to be elucidated, and our future studies will address the other candidate genes that are associated with immune suppression particularly in CIN CRCs.

Academic Significance and Societal Importance of the Research Achievements

多くの大腸癌は複数の遺伝子変異の蓄積と同時に染色体不安定性を示す。本研究では、染色体不安定性を示す大腸癌における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

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

    (6 results)

All 2022 2021 2020

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (4 results)

  • [Journal Article] Downregulation of PAICS due to loss of chromosome 4q is associated with poor survival in stage III colorectal cancer2021

    • Author(s)
      Kobayashi Yusuke、Kumamoto Kensuke、Okayama Hirokazu、Matsumoto Takuro、Nakano Hiroshi、Saito Katsuharu、Matsumoto Yoshiko、Endo Eisei、Kanke Yasuyuki、Watanabe Yohei、Onozawa Hisashi、Fujita Shotaro、Sakamoto Wataru、Saito Motonobu、Momma Tomoyuki、Takenoshita Seiichi、Kono Koji
    • Journal Title

      PLOS ONE

      Volume: 16 Issue: 2 Pages: e0247169-e0247169

    • DOI

      10.1371/journal.pone.0247169

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Validation of Gene Expression-Based Predictive Biomarkers for Response to Neoadjuvant Chemoradiotherapy in Locally Advanced Rectal Cancer2021

    • Author(s)
      Momma Tomoyuki、Okayama Hirokazu、Kanke Yasuyuki、Fukai Satoshi、Onozawa Hisashi、Fujita Shotaro、Sakamoto Wataru、Saito Motonobu、Ohki Shinji、Kono Koji
    • Journal Title

      Cancers

      Volume: 13 Issue: 18 Pages: 4642-4642

    • DOI

      10.3390/cancers13184642

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Targeting the tumor immune microenvironment in colorectal cancer2022

    • Author(s)
      岡山洋和, 片方雅紀, 松本拓朗, 遠藤英成, 佐藤孝洋, 深井智司, 佐久間芽衣, 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35回日本バイオセラピィ学会学術集会総会
    • Related Report
      2022 Annual Research Report
  • [Presentation] MSI 検査の現況2021

    • Author(s)
      藤田正太郎, 門馬智之, 伊藤美郷, 加瀬晃志, 仲野宏, 山田玲央, 松本拓朗, 山内直人, 金田晃尚, 菅家康之, 花山寛之, 渡辺洋平, 小野澤寿志, 早瀬傑, 坂本渉,齋藤元伸, 佐瀬善一郎, 河野浩二
    • Organizer
      第121回日本外科学会定期学術集会
    • Related Report
      2021 Research-status Report
  • [Presentation] 染色体不安定性による癌抑制遺伝子の欠失と腫瘍免疫抑制機構2020

    • Author(s)
      岡山洋和, 松本拓朗, 中嶋正太郎, 加瀬晃志, 仲野宏, 遠藤英成, 菅家康之, 早瀬傑, 藤田正太郎, 坂本渉, 齋藤元伸, 三村耕作, 佐瀬善一郎, 門馬智之, 河野浩二.
    • Organizer
      第58回日本癌治療学会学術集会
    • Related Report
      2020 Research-status Report
  • [Presentation] Novel mechanisms of immune suppression in colorectal cancer2020

    • Author(s)
      岡山洋和, 遠藤英成, 加瀬晃志, 仲野宏, 山内直人, 松本拓朗, 佐瀬善一郎, 門馬智之, 大木進司, 河野浩二.
    • Organizer
      第75回日本消化器外科学会総会
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2024-01-30  

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