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RNA methylation of T-UCRs regulates colon cancer progression

Research Project

Project/Area Number 21K08007
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 53010:Gastroenterology-related
Research InstitutionThe University of Tokushima

Principal Investigator

KUWANO Yuki  徳島大学, 大学院医歯薬学研究部(医学域), 講師 (00563454)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
KeywordsRNA修飾 / RNAメチル化 / 選択的スプライシング / 大腸がん / 超保存領域 / RNAプロセシング / 非コードRNA / 機能性RNA
Outline of Research at the Start

高等生物ゲノムにのみ100%保存された超保存領域(ultraconserved region: UCR)はヒトゲノムに481か所存在するが、その生理的意義は不明である。
本研究では、UCRより転写されたRNA群(T-UCR)に焦点を当て、「がん細胞に特異的なT-UCRのRNAメチル化がトリガーする新規のがん悪性化メカニズム」を明らかにする。T-UCR RNAメチル化の網羅的解析と発現誘導シグナルの検索、T-UCRメチル化の細胞内動態の検出、T-UCRによる分化プログラム制御、の解析を目標に、進化の過程で超保存領域に込められた細胞恒常性維持システムとがん化機構の解明を目指す。

Outline of Final Research Achievements

RNA methylation at adenosine N6 (m6A) is one of the most common RNA modifications which affects RNA processing, transport, and translation. Ultraconserved regions (UCRs) are 481 genomic sequences with 100% identity across humans, rats, and mice. Increasing evidence suggests that non-coding RNAs transcribed from UCRs are involved in various diseases, especially cancers.
Overexpression of T-UCR in colon cancer cells promoted cell proliferation by changing the expression of G2/M-related cell cycle regulators. m6A methylation of T-UCR was upregulated in cancer cells, compared with that of normal colon epithelial cells. We found m6A methylated RNA preferentially bound to several cancer-related RNA-binding proteins. Inhibition of m6A methylation decreased T-UCR levels and cell growth of colon cancer cells. These results suggest that m6A modification plays a pathogenic role in cell proliferation of cancer cells and may become a potential biomarker and therapeutic target for colon cancer.

Academic Significance and Societal Importance of the Research Achievements

本研究で着目したT-UCRは中途ストップコドンを持ちタンパク質には翻訳されず、 従来速やかに分解されるRNAであるため、T-UCRの蓄積は疾患特異的なバイオマーカーと成り得る。
本研究成果によって、T-UCRががん細胞核に蓄積するメカニズムの一端として、がん細胞に特徴的なm6A RNAメチル化修飾パターンと関連するRNA結合タンパク質を見出した。今後、がん細胞のみで認められるメチル化修飾配列を標的とした、正規タンパク質発現に影響を与えない、新しいコンセプトの核酸医薬の開発に繋がる可能性がある。

Report

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

    (5 results)

All 2024 2023 2022 2021

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (2 results)

  • [Journal Article] IDO1 and FOXP3: Possible immune-regulating genes alleviating cedar pollinosis via L. plantarum YIT 01322024

    • Author(s)
      Kubota N, Suzuki S, Kuwano Y, Kakiyama S, Harima-Mizusawa N, Nishida K.
    • Journal Title

      Allergy.

      Volume: - Issue: 7 Pages: 1-4

    • DOI

      10.1111/all.16039

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] circRNA: A New Biomarker and Therapeutic Target for Esophageal Cancer2022

    • Author(s)
      Shoda Katsutoshi、Kuwano Yuki、Ichikawa Daisuke、Masuda Kiyoshi
    • Journal Title

      Biomedicines

      Volume: 10 Issue: 7 Pages: 1643-1643

    • DOI

      10.3390/biomedicines10071643

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Multiple G-quadruplexes in the LMNA promoter regulate LMNA variant 6 transcription and promote colon cancer cell growth2021

    • Author(s)
      Nishikawa Tatsuya、Kuwano Yuki、Nakata Mayu、Rokutan Kazuhito、Nishida Kensei
    • Journal Title

      Biochimica et Biophysica Acta (BBA) - Gene Regulatory Mechanisms

      Volume: 1864 Issue: 10 Pages: 194746-194746

    • DOI

      10.1016/j.bbagrm.2021.194746

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] 抗老化RNA uc.138 のm6Aメチル化修飾を介した大腸がん悪性化メカニズム2023

    • Author(s)
      桑野 由紀, KEYOUMU NAZERE, 西田 憲生, 森野 豊之
    • Organizer
      第46回日本分子生物学会年会
    • Related Report
      2023 Annual Research Report
  • [Presentation] RNA修飾を介した大腸がん細胞の抗老化スイッチの解明.2021

    • Author(s)
      桑野由紀、西田憲生、森野豊之
    • Organizer
      第44回日本分子生物学会年会
    • Related Report
      2021 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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