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Development and evaluation of 2',3'-bridged nucleic acid with constrained conformation of sugar and phosphate backbone

Research Project

Project/Area Number 20K15401
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 37010:Bio-related chemistry
Research InstitutionOsaka University

Principal Investigator

Osawa Takashi  大阪大学, 薬学研究科, 助教 (00783226)

Project Period (FY) 2020-04-01 – 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: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2020: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords核酸化学 / 有機化学
Outline of Research at the Start

短工程で合成でき、かつ糖部とリン酸部の配座を固定化した人工核酸は今までにない実用的なオリゴ核酸材料になるという考えのもと、5員環-6員環のトランス縮環骨格を利用した2′,3′-架橋型核酸を設計した。本研究では、2′,3′-架橋型核酸の合成と構造解析、並びに2′,3′-架橋型核酸で修飾したオリゴ核酸の機能評価 (培養細胞系での薬効評価) を行う。本研究の成果は、核酸創薬をはじめとする核酸関連領域の発展につながるものである。

Outline of Final Research Achievements

An artificial nucleic acid that can be synthesized in a short process and that has a strictly fixed conformation of the sugar and the phosphate moieties will be a practical nucleic acid pharmaceutical material that has never existed before. In this study, 2',3'-bridged nucleic acid with a 5,6-trans-fused ring was designed and synthesized. As the results, we succeeded in constructing a bicyclic skeleton with a 1,4-dioxane ring that does not have a phosphate structure. On the other hand, since the nucleoside derivatives with a phosphonate ester was extremely unstable to acidic and basic conditions, 2',3'-bridged nucleic acids having a phosphonate ester could not be synthesized.

Academic Significance and Societal Importance of the Research Achievements

糖部2′位と3′位の間で架橋した5員環-6員環トランス縮環骨格を有する人工核酸の合成例は世界初である。合成した2′,3′-架橋型核酸は糖部とリン酸部の配座が高度に固定された特徴的な構造を有しており、核酸医薬をはじめとするオリゴ核酸を基盤とする技術への応用が期待される。

Report

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

    (10 results)

All 2022 2021 2020

All Journal Article (5 results) (of which Peer Reviewed: 5 results,  Open Access: 2 results) Presentation (5 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] New cleavable spacers for tandem synthesis of multiple oligonucleotides2021

    • Author(s)
      Hari Yoshiyuki、Yamamoto Kazuki、Fuchi Yasufumi、Okabe Masaya、Osawa Takashi、Ito Yuta
    • Journal Title

      Synthesis

      Volume: 53 Issue: 23 Pages: 4440-4448

    • DOI

      10.1055/a-1538-9883

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The effect of the base triplets adjacent to a T-CG or 5-methylC-CG triplet in the triplex DNA2021

    • Author(s)
      Hari Yoshiyuki、Ito Yuta、Hama Chisa、Osawa Takashi
    • Journal Title

      HETEROCYCLES

      Volume: 103 Issue: 1 Pages: 322-322

    • DOI

      10.3987/com-20-s(k)16

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Synthesis and properties of oligonucleotides bearing thymidine derivatives with 1,6-dioxaspiro[4.5]decane skeleton2021

    • Author(s)
      Osawa Takashi、Kawaguchi Miho、Jang Ye-Jin、Ito Yuta、Hari Yoshiyuki
    • Journal Title

      Bioorganic & Medicinal Chemistry

      Volume: 31 Pages: 115966-115966

    • DOI

      10.1016/j.bmc.2020.115966

    • Related Report
      2021 Annual Research Report 2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Synthesis and Hybridizing Property of Oligonucleotides Including 2′-C,4′-C-Ethyleneoxy-Bridged 2′-Deoxyadenosine with an Exocyclic Methylene Unit2020

    • Author(s)
      Hari Yoshiyuki、Osawa Takashi、Onishi Yoshinori、Ito Yuta
    • Journal Title

      HETEROCYCLES

      Volume: 101 Issue: 1 Pages: 284-284

    • DOI

      10.3987/com-19-s(f)24

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Synthesis of Oligonucleotides Containing 2′-N-alkylaminocarbonyl-2′-amino-LNA (2′-urea-LNA) Moieties Using Post-Synthetic Modification Strategy2020

    • Author(s)
      Yamashita Shoko、Nishida Kodai、Osawa Takashi、Nakanishi Ayumi、Ito Yuta、Hari Yoshiyuki
    • Journal Title

      Molecules

      Volume: 25 Issue: 2 Pages: 346-346

    • DOI

      10.3390/molecules25020346

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Ugi反応を基盤としたDNAコード化ライブラリー合成法の開発2022

    • Author(s)
      〇喜多良介,大澤昂志,小比賀聡
    • Organizer
      日本薬学会第142年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 膵臓がん治療を目的とするアンチセンス核酸医薬の合成および評価2022

    • Author(s)
      〇設樂華,児玉和己,國丸颯生,佐々木千愛,芹澤杏萌,三島啓士朗,三上敦士,大澤昂志,下條正仁,山口卓男,小比賀聡
    • Organizer
      日本薬学会第142年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 細胞内還元条件で糖部配座が固定化されるアミド架橋型核酸の開発2021

    • Author(s)
      〇宮田康介,大澤昂志,小比賀聡
    • Organizer
      第71年会日本薬学会関西支部大会・総会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 1-オキサスピロ[4.5]デカン構造を有するチミジンアナログの合成と物性評価2021

    • Author(s)
      〇矢野夏実,大澤昂志,小比賀聡
    • Organizer
      第71年会日本薬学会関西支部大会・総会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Synthesis of an amide-linked dinucleotide containing a 3', 4'-bridged nucleic acid and duplex-forming ability of the modified oligonucleotides2021

    • Author(s)
      ○Taiki Akino, Takashi Osawa, Satoshi Obika
    • Organizer
      The 48th International Symposium on Nucleic Acids Chemistry
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research

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Published: 2020-04-28   Modified: 2023-01-30  

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