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Development of a methylated DNA sensing system for circulating tumor cells detection

Research Project

Project/Area Number 17K06933
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Biofunction/Bioprocess
Research InstitutionTokyo University of Technology

Principal Investigator

YOSHIDA Wataru  東京工科大学, 応用生物学部, 講師 (10599806)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywordsメチル化CpG / メチル化アデニン / グアニン四重鎖 / 定量PCR / 熱安定性 / DNAメチル化 / グアニン四重鎖DNAクラスター / 全ゲノム増幅 / 次世代シークエンサー / デジタルPCR / 1分子計測
Outline of Final Research Achievements

We have previously reported that PCR amplification efficiency decreased when the template DNA containing VEGF G-quadruplex (G4) was CpG methylated. In this project, thermal stability of the CpG methylated VEGF G4 structure was analyzed. The results revealed that the G4 structure was stabilized by CpG methylation in the presence of 20 mM NaCl and 2 mM MgCl2. Thermal analysis also demonstrated that c-kit1 G4 structure was destabilized by N6-methyladenosine modifications. Moreover, 9,651 G4 clusters were identified in human genomic DNA by high-throughput sequencing of whole genome amplified products with a G4 ligand.

Academic Significance and Societal Importance of the Research Achievements

本研究により、CpGのメチル化とアデニンのメチル化がG4構造の熱安定性に影響を与えることが示された。さらに、本メチル化レベル測定法の標的となるG4構造形成配列が含まれるヒトゲノムDNA領域を網羅的に同定することに成功した。つまり、今後これらの知見を基に、定量PCRを行うだけで簡便に標的遺伝子のCpGメチル化レベルやアデニンメチル化レベルを測定できる方法が開発され、種々の疾病の診断法へ利用されることが期待される。また、メチル化レベル測定法の開発だけでなく、メチル化G4構造の生体内での機能解明にも貢献することが期待される。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (12 results)

All 2020 2019 2018 Other

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (8 results) (of which Int'l Joint Research: 1 results) Remarks (1 results)

  • [Journal Article] Destabilisation of the c-kit1 G-quadruplex structure by N6-methyladenosine modification2020

    • Author(s)
      Saowalak Laddachote, Mayu Nagata, Wataru Yoshida
    • Journal Title

      Biochem. Biophys. Res. Commun.

      Volume: 524 Issue: 2 Pages: 472-476

    • DOI

      10.1016/j.bbrc.2020.01.116

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Stabilization of G-quadruplex structure on vascular endothelial growth factor gene promoter depends on CpG methylation site and cation type2018

    • Author(s)
      Yoshida Wataru、Terasaka Mizuki、Laddachote Saowalak、Karube Isao
    • Journal Title

      Biochimica et Biophysica Acta (BBA) - General Subjects

      Volume: 1862 Issue: 9 Pages: 1933-1937

    • DOI

      10.1016/j.bbagen.2018.06.014

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Identification of G-quadruplex clusters by high-throughput sequencing of whole-genome amplified products with a G-quadruplex ligand2018

    • Author(s)
      Yoshida Wataru、Saikyo Hiroki、Nakabayashi Kazuhiko、Yoshioka Hitomi、Bay Daniyah Habiballah、Iida Keisuke、Kawai Tomoko、Hata Kenichiro、Ikebukuro Kazunori、Nagasawa Kazuo、Karube Isao
    • Journal Title

      Scientific Reports

      Volume: 8 Issue: 1 Pages: 3116-3116

    • DOI

      10.1038/s41598-018-21514-7

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Stabilization of the RET G-quadruplex structure by CpG methylation2019

    • Author(s)
      ラダチョト サワラク、吉田 亘
    • Organizer
      核酸化学若手フォーラム2019
    • Related Report
      2019 Annual Research Report
  • [Presentation] Thermal stability analysis of CpG-methylated RET G-quadruplex structures2019

    • Author(s)
      Saowalak Laddachote, Wataru Yoshida
    • Organizer
      ISNAC2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] N6アデニンメチル化修飾c-kit1グアニン四重鎖の熱安定性解析2019

    • Author(s)
      ラダチョト サワラク、吉田 亘
    • Organizer
      第42回日本分子生物学会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 石井 里佳、ラダチョト サワラク、吉田 亘2019

    • Author(s)
      メチル化修飾によるc-kit2グアニン四重鎖構造の不安定化
    • Organizer
      第42回日本分子生物学会
    • Related Report
      2019 Annual Research Report
  • [Presentation] MBD融合GFPを用いたゲノムDNAメチル化頻度測定法の開発2019

    • Author(s)
      川上 万理子、高 夏海、吉田 亘
    • Organizer
      第42回日本分子生物学会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 等温PCR法を用いたDNA四重鎖構造中のメチル頻度測定法の開発2019

    • Author(s)
      馬場 勇次、吉田 亘
    • Organizer
      第42回日本分子生物学会
    • Related Report
      2019 Annual Research Report
  • [Presentation] メチル化c-Kitグアニン四重鎖の熱安定性解析2018

    • Author(s)
      石井 里佳, ラダチョト サワラク, 吉田 亘
    • Organizer
      第41回日本分子生物学会年会
    • Related Report
      2018 Research-status Report
  • [Presentation] メチル化RETグアニン四重鎖の熱安定性解析2018

    • Author(s)
      ラダチョト サワラク, 吉田 亘
    • Organizer
      第41回日本分子生物学会年会
    • Related Report
      2018 Research-status Report
  • [Remarks] ヒトゲノム中の「四重鎖構造」複数形成領域を約1万箇所同定 これらを標的とした抗がん剤開発へ

    • URL

      http://www.teu.ac.jp/press/2018.html?id=44

    • Related Report
      2017 Research-status Report

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Published: 2017-04-28   Modified: 2021-02-19  

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