• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Elucidation of the mechanism of novel regulators of tumor suppressor microRNA let-7 and search for novel therapeutic targets

Research Project

Project/Area Number 19K16794
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 50020:Tumor diagnostics and therapeutics-related
Research InstitutionTokyo Medical and Dental University

Principal Investigator

Kurimoto Ryota  東京医科歯科大学, 大学院医歯学総合研究科, 講師 (10753957)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
KeywordsRNA / マイクロRNA / RNA修飾 / CLIP / シュードウリジン / microRNA / tRNA修飾酵素 / 腫瘍抑制 / let-7 / tRNA / がん / RNA結合タンパク質
Outline of Research at the Start

悪性腫瘍を抑制する中心的なmicroRNAとしてlet-7が知られており、腫瘍マーカーや治療標的として注目されている。申請者は、let-7の発現変化をもたらす分子をスクリーニングし、新しい制御因子LetRF-1を同定した。これは、let-7の発現を選択的に上昇させ、腫瘍の増殖能を抑制 することを明らかとした。
本研究では、悪性腫瘍におけるlet-7の制御機構を解明し、さらに、悪性腫瘍の増殖や分化転換を抑制する可能性を探る。

Outline of Final Research Achievements

Let-7 functions as a core tumor suppressor microRNA in many malignancies. Although let-7 is regulated by RNA-binding proteins (RBPs), the full extent of this regulation is unknown.
In this study, we applied a luciferase reporter to target all RBPs and functionally screened for genes that regulate let-7 expression, and identified several genes including a new regulator, TruB1. Biochemical analysis and comprehensive analysis using next-generation sequencers revealed that TruB1, a tRNA-modifying enzyme, binds specifically to let-7 and positively regulates it in an enzyme activity-independent manner. We also found that this suppresses tumor growth potential.

Academic Significance and Societal Importance of the Research Achievements

このtRNA修飾酵素TruB1が、その酵素活性とは独立してlet-7を上昇させることを明らかにした。この機構は、酵素活性という既存の機能のみに注目した研究方法では見出すことが困難であったが、microRNAの機能的スクリーニングとRNAへの結合を網羅的に解析するCLIP法の組み合わせによって初めて見出すことが可能となった。ゲノム遺伝学や既存の治療法、検査法のみでは解析の困難なエピトランスクリプトームの研究手法の選択肢を示すものである。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (16 results)

All 2021 2020 2019

All Journal Article (7 results) (of which Int'l Joint Research: 7 results,  Peer Reviewed: 7 results,  Open Access: 4 results) Presentation (8 results) (of which Int'l Joint Research: 3 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Both microRNA-455-5p and -3p repress hypoxia-inducible factor-2α expression and coordinately regulate cartilage homeostasis.2021

    • Author(s)
      Ito Y, Matsuzaki T, Ayabe F, Mokuda S, Kurimoto R, Matsushima T, Tabata Y, Inotsume M, Tsutsumi H, Liu L, Shinohara M, Tanaka Y, Nakamichi R, Nishida K, Lotz MK, Asahara H.
    • Journal Title

      Nat Commun

      Volume: 12 Issue: 1 Pages: 4148-4148

    • DOI

      10.1038/s41467-021-24460-7

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Identification of chemical compounds regulating PD‐L1 by introducing HiBiT‐tagged cells2021

    • Author(s)
      Uchida Yutaro、Matsushima Takahide、Kurimoto Ryota、Chiba Tomoki、Inutani Yuki、Asahara Hiroshi
    • Journal Title

      FEBS Letters

      Volume: 595 Issue: 5 Pages: 563-576

    • DOI

      10.1002/1873-3468.14032

    • Related Report
      2021 Annual Research Report 2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] The tRNA pseudouridine synthase TruB1 regulates the maturation of let‐7 miRNA2020

    • Author(s)
      Kurimoto Ryota、Chiba Tomoki、Ito Yoshiaki、Matsushima Takahide、Yano Yuki、Miyata Kohei、Yashiro Yuka、Suzuki Tsutomu、Tomita Kozo、Asahara Hiroshi
    • Journal Title

      The EMBO Journal

      Volume: 39 Issue: 20

    • DOI

      10.15252/embj.2020104708

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] In vitro Neo-Genesis of Tendon/Ligament-Like Tissue by Combination of Mohawk and a Three-Dimensional Cyclic Mechanical Stretch Culture System2020

    • Author(s)
      Kataoka Kensuke、Kurimoto Ryota、Tsutsumi Hiroki、Chiba Tomoki、Kato Tomomi、Shishido Kana、Kato Mariko、Ito Yoshiaki、Cho Yuichiro、Hoshi Osamu、Mimata Ayako、Sakamaki Yuriko、Nakamichi Ryo、Lotz Martin K.、Naruse Keiji、Asahara Hiroshi
    • Journal Title

      Frontiers in Cell and Developmental Biology

      Volume: 8 Pages: 307-307

    • DOI

      10.3389/fcell.2020.00307

    • NAID

      120006869584

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Transcriptome analysis of sevoflurane exposure effects at the different brain regions.2020

    • Author(s)
      Yamamoto H, Uchida Y, Chiba T, Kurimoto R, Matsushima T, Inotsume M, Ishikawa C, Li H, Shiga T, Muratani M, Uchida T, Asahara H
    • Journal Title

      PLos One

      Volume: 15 Issue: 12 Pages: e0236771-e0236771

    • DOI

      10.1371/journal.pone.0236771

    • NAID

      120007180737

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Transcriptional, epigenetic and microRNA regulation of growth plate2020

    • Author(s)
      Ryo Nakamichiab, RyotaKurimotoc, Yusuke Tabatad, Hirosi Asahara
    • Journal Title

      Bone

      Volume: in press Pages: 115434-115434

    • DOI

      10.1016/j.bone.2020.115434

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Post-transcriptional regulation of inflammation by RNA-binding proteins via cis-elements of mRNAs2019

    • Author(s)
      Uchida Yutaro、Chiba Tomoki、Kurimoto Ryota、Asahara Hiroshi
    • Journal Title

      The Journal of Biochemistry

      Volume: 166 Issue: 5 Pages: 375-382

    • DOI

      10.1093/jb/mvz067

    • NAID

      40022069517

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Tumor suppression potential of tRNA modification enzyme TruBs via let-72021

    • Author(s)
      Ryota Kurimoto, Hiroki Tsutsumi, Saki lkeuchi, Hiroshi Asahara
    • Organizer
      AACR 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] RNA Modification Enzyme TruB1 Regulate Tumor Proliferation via MicroRNA let-7.2021

    • Author(s)
      Kurimoto R, Asahara H
    • Organizer
      International Association for the study of Lung Cancer 2020 World Conference on Lung Cancer
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] The tumor suppression potential of RNA pseudouridine synthase family via microRNA regulation2020

    • Author(s)
      Kurimoto R, Ikeuchi S, Asahara H
    • Organizer
      The 18th meeting of Japan Society of Medical Oncology
    • Related Report
      2020 Research-status Report
  • [Presentation] The tRNA pseudouridine synthase TruB1 regulates the maturation of let-7 miRNA.2020

    • Author(s)
      Kurimoto R, Asahara H
    • Organizer
      2nd RNAJ Online Meeting
    • Related Report
      2020 Research-status Report
  • [Presentation] New regulatory mechanism of tumor suppressor microRNA let-7s2019

    • Author(s)
      Ryota Kurimoto, Hiroki Tsutsumi, Maiko Inotsume, Hiroshi Asahara.
    • Organizer
      16thn Bone Biology Forum
    • Related Report
      2019 Research-status Report
  • [Presentation] 腫瘍抑制microRNA let-7 familyの新たな制御機構の解明2019

    • Author(s)
      Ryota Kurimoto, Hiroki Tsutsumi, Yutaro Uchida, Hiroshi Asahara.
    • Organizer
      第17回日本臨床腫瘍学会
    • Related Report
      2019 Research-status Report
  • [Presentation] miRNAs in arthritis pathogenesis and therapy.2019

    • Author(s)
      Hiroshi Asahara, Sho Mokuda, Yoshiaki Ito, Masafumi Inui, Ryo Nakamichi, Tomoki Chiba, Ryota Kurimoto, Takahide Matsushima.
    • Organizer
      The 24th Annual Meeting of the RNA Society
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 腫瘍抑制microRNA let-7 familyの新たな制御機構の解明2019

    • Author(s)
      猪爪 舞子, 栗本 遼太, 堤 大樹, 細貝 春香, 浅原 弘嗣
    • Organizer
      日本分子生物学会
    • Related Report
      2019 Research-status Report
  • [Patent(Industrial Property Rights)] ハイスループット遺伝子編集技術2020

    • Inventor(s)
      淺原弘嗣、栗本遼太、松島隆英、堤大樹
    • Industrial Property Rights Holder
      淺原弘嗣、栗本遼太、松島隆英、堤大樹
    • Industrial Property Rights Type
      特許
    • Filing Date
      2020
    • Related Report
      2019 Research-status Report

URL: 

Published: 2019-04-18   Modified: 2023-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi