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Elucidating pathogenic mechanisms of microcephaly and intellectual disability upon dysfunction of tRNA modifications

Research Project

Project/Area Number 20H03187
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 43010:Molecular biology-related
Research InstitutionKumamoto University

Principal Investigator

Chujo Takeshi  熊本大学, 大学院生命科学研究部(医), 講師 (50788578)

Co-Investigator(Kenkyū-buntansha) 富澤 一仁  熊本大学, 大学院生命科学研究部(医), 教授 (40274287)
魏 范研  東北大学, 加齢医学研究所, 教授 (90555773)
Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2023: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2022: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
KeywordsRNA修飾 / タンパク質合成 / tRNA / tRNA修飾 / ウイルス / HIV-1 / 知的障害 / エピトランスクリプトミクス / メチル化 / RNA修飾病 / トランスファーRNA / タンパク質翻訳
Outline of Research at the Start

本研究の目的は、トランスファーRNA(tRNA)の化学修飾の破綻が引きおこす小頭症と精神遅滞の発症メカニズムの解明である。tRNAとリボソームが担うタンパク質翻訳において、tRNAへのメチル化等の化学修飾が不可欠であるため、疾患を引きおこす変異を持つtRNA修飾酵素が50種類以上ある。中でも、脳の発育不全による小頭症とそれに伴う精神遅滞を引きおこす変異を持つtRNA修飾酵素が13種類も存在するが、発症する分子機構や、脳のみで顕著な症状が出る機序は未解明である。本研究ではtRNA修飾の破綻・撹乱による小頭症と精神遅滞の発症機構、および脳特異的に症状が生じる機序を解明する。

Outline of Final Research Achievements

We have elucidated 1) the pathogenic mechanism of intellectual disability using tRNA methyltransferase Ftsj1 KO mice (Science Advances, 2021); 2) the functions of tRNA methyltransferase TRMT6–TRMT61A in HIV-1 infection (Nucleic Acids Research, 2021), 3) the effect of i6A to chemoresistant cancer cell line and its mechanism (RNA, 2022); 4) the function of methyltransferase NSUN3 in mouse embryonic development and respiratory complex IV (Communications Biology, 2023), and 5) the pathogenic mechanism of intellectual disability in tRNA methyltransferase Trmt10a KO mice (under revision).

Academic Significance and Societal Importance of the Research Achievements

トランスファーRNA修飾の欠損により知的障害やミトコンドリア病など様々な疾患が引き起こされるが、その分子機序の大部分はわかっていなかった。私達の研究により、2種類のtRNA修飾酵素の機能欠損による知的障害の発症メカニズム、HIV-1がtRNA修飾を使用するメカニズム、抗がん剤耐性を有するがん細胞の一種に対する修飾ヌクレオシドi6Aの作用とその機序、tRNA修飾酵素の一種の機能欠損によるミトコンドリア病の発症メカニズムを解明できた。これらの知見は、これらの疾患の治療方法を探る上で必須な基礎知見となる。

Report

(3 results)
  • 2023 Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (14 results)

All 2022 2021 2020 Other

All Int'l Joint Research (1 results) Journal Article (6 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 6 results,  Open Access: 6 results) Presentation (4 results) (of which Int'l Joint Research: 2 results,  Invited: 2 results) Remarks (3 results)

  • [Int'l Joint Research] Yale University School of Medicine(米国)

    • Related Report
      2020 Annual Research Report
  • [Journal Article] Resistance to chemical carcinogenesis induction via a dampened inflammatory response in naked mole-rats2022

    • Author(s)
      Oka K, Fujioka S, Kawamura Y, Komohara Y, Chujo T, Sekiguchi K, Yamamura Y, Oiwa Y, Omamiuda-Ishikawa N, Komaki S, Sutoh Y, Sakurai S, Tomizawa K, Bono H, Shimizu A, Araki K, Yamamoto T, Yamada Y, Oshiumi H, Miura K.
    • Journal Title

      Communications Biology

      Volume: 5 Issue: 1 Pages: 287-287

    • DOI

      10.1038/s42003-022-03241-y

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Cooperative methylation of human tRNA3Lys at positions A58 and U54 drives the early and late steps of HIV-1 replication2021

    • Author(s)
      Fukuda Hiroyuki、Chujo Takeshi、Wei Fan-Yan、Shi Sheng-Lan、Hirayama Mayumi、Kaitsuka Taku、Yamamoto Takahiro、Oshiumi Hiroyuki、Tomizawa Kazuhito
    • Journal Title

      Nucleic Acids Research

      Volume: 49 Issue: 20 Pages: 11855-11867

    • DOI

      10.1093/nar/gkab879

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Export of RNA-derived modified nucleosides by equilibrative nucleoside transporters defines the magnitude of autophagy response and Zika virus replication2021

    • Author(s)
      Shi Sheng-Lan、Fukuda Hiroyuki、Chujo Takeshi、Kouwaki Takahisa、Oshiumi Hiroyuki、Tomizawa Kazuhito、Wei Fan-Yan
    • Journal Title

      RNA Biology

      Volume: 18 Issue: sup1 Pages: 478-495

    • DOI

      10.1080/15476286.2021.1960689

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Human transfer RNA modopathies: diseases caused by aberrations in transfer RNA modifications.2021

    • Author(s)
      Chujo T, Tomizawa K.
    • Journal Title

      FEBS J.

      Volume: 288 Issue: 24 Pages: 1-27

    • DOI

      10.1111/febs.15736

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Loss of Ftsj1 perturbs codon-specific translation efficiency in the brain and is associated with X-linked intellectual disability2021

    • Author(s)
      Nagayoshi Y.、Chujo T.、Hirata S.、Nakatsuka H.、Chen C.-W.、Takakura M.、Miyauchi K.、Ikeuchi Y.、Carlyle B. C.、Kitchen R. R.、Suzuki T.、Katsuoka F.、Yamamoto M.、Goto Y.、Tanaka M.、Natsume K.、Nairn A. C.、Suzuki T.、Tomizawa K.、Wei F.-Y.
    • Journal Title

      Science Advances

      Volume: 7 Issue: 13

    • DOI

      10.1126/sciadv.abf3072

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] FTO Demethylates Cyclin D1 mRNA and Controls Cell-Cycle Progression2020

    • Author(s)
      Hirayama Mayumi、Wei Fan-Yan、Chujo Takeshi、Oki Shinya、Yakita Maya、Kobayashi Daiki、Araki Norie、Takahashi Nozomu、Yoshida Ryoji、Nakayama Hideki、Tomizawa Kazuhito
    • Journal Title

      Cell Reports

      Volume: 31 Issue: 1 Pages: 107464-107464

    • DOI

      10.1016/j.celrep.2020.03.028

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] How does transfer RNA methylation deficiency cause intellectual disability?2021

    • Author(s)
      Takeshi Chujo
    • Organizer
      KAIST - Kumamoto University Joint Invited Speaker Seminar Series
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Cooperative methylation of human tRNA3Lys at positions A58 and U54 drive the early and late steps of HIV-1 replication2021

    • Author(s)
      Takeshi Chujo
    • Organizer
      第22回日本RNA学会年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] How can tRNA methylation dysfunction cause intellectual disability? And how can we cure the disease?2021

    • Author(s)
      Takeshi Chujo
    • Organizer
      1st International Symposium of the CMHA
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] How can tRNA methylation dysfunction cause intellectual disability? And, how can we target the Central Dogma to cure the disease?2021

    • Author(s)
      中條岳志
    • Organizer
      第48回発生研情報交換会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Remarks] HIVは宿主(ヒト)のRNA修飾を悪用して感染・増殖する-新しい戦略の抗ウイルス薬の開発に期待-

    • URL

      https://www.jst.go.jp/pr/announce/20211013/index.html

    • Related Report
      2021 Annual Research Report
  • [Remarks] HIVは宿主(ヒト)のRNA修飾を悪用して感染・増殖する-新しい戦略の抗ウイルス薬の開発に期待-

    • URL

      https://www.kumamoto-u.ac.jp/whatsnew/seimei/20211013

    • Related Report
      2021 Annual Research Report
  • [Remarks] X染色体連鎖性精神遅滞のメカニズムを解明!ー新規治療薬開発に道ー

    • URL

      https://www.kumamoto-u.ac.jp/whatsnew/seimei/20210327

    • Related Report
      2020 Annual Research Report

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

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