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Design and evaluation of artificial nucleic acid covering various point mutations of genes.

Research Project

Project/Area Number 19K05584
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 35010:Polymer chemistry-related
Research InstitutionTottori University

Principal Investigator

SAKURAI Toshihiko  鳥取大学, 工学研究科, 准教授 (10332868)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Keywordsペプチド核酸 / KRAS遺伝子 / アンチセンス核酸医薬 / ヒポキサンチン / 相補鎖形成 / KRAS遺伝子変異 / 一塩基多型 / 相補鎖形成挙動 / 点突然変異 / 難治性がん疾患 / 遺伝子発現抑制
Outline of Research at the Start

1塩基認識能に優れたinchworm型ペプチド核酸(PNA)-ポリエチレングリコール(PEG)コンジュゲート(i-PPC)に複数の塩基(シトシン,アデニン,チミン)と塩基対を形成できるヒポキサンチンを導入し、KRAS遺伝子点突然変異を網羅的に認識することのできるアンチセンス分子を設計・合成する。さらに、合成したi-PPC(Hyp)のがん細胞内への輸送を試み、KRAS遺伝子変異性がん細胞の細胞死誘導効果について検討し、新規の遺伝子治療薬としての可能性について検討する。

Outline of Final Research Achievements

In this study, we synthesized a PNA monomer with hypoxanthin (Hyp) at the side chain, which forms a comprehensive base pair with citocin (C), adenin (A), timine (T), and uracil (U), and we investigated the application to nucleic acid medicines corresponding to point mutations by analyzing the complementary hybridization behavior of oligo PNA and synDNA. As a result, in the comprehensive complementary chain formation of C, A, and T other than G, the difference between the values (delta-G at 37℃) of GGT and GTT at is estimated to be 0.17 kcal / mol, which makes it difficult to recognize G and T. This means that it is difficult for oligo PNA to comprehensively recognize anything other than G. On the other hand, the difference between the values of delta-G at 37℃ between WT (GGT) and MT (GCT) is estimated to be 2.75 kcal / mol, It was suggested that it could be applied to other single nucleotide polymorphic disease in which the wild type is cytosine.

Academic Significance and Societal Importance of the Research Achievements

KRAS遺伝子のexon2codon12を中心とした多様な点突然変異はすい臓がんの90%、大腸がんの40%にみられ、がん疾患全体の約40%に生じる遺伝子変異である.この変異により,最新の分子標的薬(抗EGFR抗体薬)の薬効が期待できない問題点を引き起こすが、変異のパターンは多様であるため、それぞれに対応した核酸医薬を開発しなければならない.ヒポキサンチンがゆらぎ塩基として作用することに着目し、細胞内で正常な塩基配列とそれ以外の点突然変異群を識別する新たな核酸モデルの設計と物性評価は、多様な変異を網羅したアンチセンス型核酸医薬としての展開が可能となる.

Report

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

    (17 results)

All 2022 2021 2020 2019

All Journal Article (11 results) (of which Peer Reviewed: 11 results) Presentation (5 results) (of which Invited: 2 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Reductive Coupling of Isatins with α,β-Unsaturated Carbonyl Compounds by Low-Valent Titanium2022

    • Author(s)
      Kise Naoki、Mitsui Yuki、Sakurai Toshihiko
    • Journal Title

      Bulletin of the Chemical Society of Japan

      Volume: 95 Issue: 1 Pages: 104-109

    • DOI

      10.1246/bcsj.20210357

    • NAID

      130008159261

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Suppression of Intracellular Gene Expression by Inchworm-Type PNA-PEG Conjugate Depends on Recognition of a Monobasic Mutation2021

    • Author(s)
      Hamashita Yusuke、Kise Naoki、Sakurai Toshihiko
    • Journal Title

      Bulletin of the Chemical Society of Japan

      Volume: 94 Issue: 7 Pages: 1804-1806

    • DOI

      10.1246/bcsj.20210126

    • NAID

      130008076877

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Electroreductive Coupling of Phthalimides with α,β-Unsaturated Carbonyl Compounds and Subsequent Acid-Catalyzed Rearrangement to 4-Aminonaphthalen-1-ols: Density Functional Theory Study of the Acid-Catalyzed Rearrangement of Ketene Silyl Acetals2021

    • Author(s)
      Kise Naoki、Manto Tatsuhiro、Sakurai Toshihiko
    • Journal Title

      The Journal of Organic Chemistry

      Volume: 86 Issue: 24 Pages: 18232-18246

    • DOI

      10.1021/acs.joc.1c02512

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] In vitro transcytosis of Helicobacter pylori histidine-rich protein through gastric epithelial-like cells and the blood?brain barrier2021

    • Author(s)
      Iwasaki Takashi、Maruyama Aiki、Inui Yurika、Sakurai Toshihiko、Kawano Tsuyoshi
    • Journal Title

      Bioscience, Biotechnology, and Biochemistry

      Volume: 86 Issue: 3 Pages: 321-330

    • DOI

      10.1093/bbb/zbab221

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Inchworm-type PNA-PEG conjugate regulates gene expression based on single nucleotide recognition2021

    • Author(s)
      Yusuke Hamashita, Takahiro Shibata, Akiko Takeuchi, Takashi Okuno, Naoki Kise, Toshihiko Sakurai
    • Journal Title

      International Journal of Biological Macromolecules

      Volume: 181 Pages: 471-477

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Reductive intramolecular coupling of phthalimides with esters and ketones by low-valent titanium2020

    • Author(s)
      Naoki Kise, Tatsuhiro Manto, Toshihiko Sakurai
    • Journal Title

      Tetrahedron

      Volume: 76(52) Issue: 52 Pages: 131725-131725

    • DOI

      10.1016/j.tet.2020.131725

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Electroreductive Coupling of Phthalic Anhydrides with α,β-Unsaturated Carbonyl Compounds: Synthesis of 1,4-Dihydroxynaphthalenes2020

    • Author(s)
      Naoki Kise, Shota Yamamoto, Toshihiko Sakurai
    • Journal Title

      The Journal of Organic Chemistry

      Volume: 85(21) Issue: 21 Pages: 13973-13982

    • DOI

      10.1021/acs.joc.0c02000

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Reductive coupling of phthalic anhydrides with aliphatic ketones by low-valent titanium: Unusual two-to-one coupling for preparation of 3,3-disubstituted phthalides2020

    • Author(s)
      Kise Naoki、Yamamoto Shota、Sakurai Toshihiko
    • Journal Title

      Tetrahedron

      Volume: 76 Issue: 3 Pages: 130820-130820

    • DOI

      10.1016/j.tet.2019.130820

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Electroreductive Intermolecular Coupling of 4-Quinolones with Benzophenones: Synthesis of 2-Substituted 4-Quinolones2019

    • Author(s)
      Kise Naoki、Yoshimura Yoshie、Manto Tatsuhiro、Sakurai Toshihiko
    • Journal Title

      ACS Omega

      Volume: 4 Issue: 22 Pages: 20080-20093

    • DOI

      10.1021/acsomega.9b03342

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Reductive coupling of aliphatic cyclic imides and ω-amidoesters with benzophenones by low-valent titanium: Synthesis of 5-diarylmethylene-1,5-dihydropyrrol-2-ones, 6-diarylmethyl-2-pyridones, and ω-(diarylmethylene)lactams2019

    • Author(s)
      Kise Naoki、Kinameri Syn、Sakurai Toshihiko
    • Journal Title

      Tetrahedron

      Volume: 75 Issue: 26 Pages: 3553-3569

    • DOI

      10.1016/j.tet.2019.05.013

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Electroreductive Intermolecular Coupling of Chromones with Benzophenones: Synthesis of 2-Diarylmethylchromones and Tetrasubstituted Furans2019

    • Author(s)
      Kise Naoki、Nagamine Hiroaki、Sakurai Toshihiko
    • Journal Title

      European Journal of Organic Chemistry

      Volume: 2019 Issue: 22 Pages: 3662-3676

    • DOI

      10.1002/ejoc.201900519

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] エンドソームからの薬物リリースを目的としたペプチドタグに関する研究2020

    • Author(s)
      左右田 佳輝, 中村 朱里, 木瀬 直樹, 櫻井 敏彦
    • Organizer
      第35回 中国四国地区高分子若手研究会
    • Related Report
      2020 Research-status Report
  • [Presentation] 難治性がん治療を目指した核酸医薬の開発2019

    • Author(s)
      櫻井 敏彦
    • Organizer
      PHOENICSシンポジウム特別講演会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] 細胞内で1塩基変異を認識する人工遺伝子の開発 ~難治性がん疾患治療薬への応用をめざして~2019

    • Author(s)
      櫻井 敏彦
    • Organizer
      関西大学先端科学技術推進機構 研究部門別発表会(第59回)
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] Inchworm 型人工核酸による遺伝子変異性がん細胞の誘導死効果2019

    • Author(s)
      濱下 優介, 木瀬 直樹, 櫻井 敏彦
    • Organizer
      第68 回高分子学会年次大会
    • Related Report
      2019 Research-status Report
  • [Presentation] リソソーム内分解酵素を利用した細胞内薬物徐放に関する研究2019

    • Author(s)
      吉田 裕紀 江原 麻紀 ,木瀬 直樹 ,櫻井 敏彦
    • Organizer
      第34回中国四国高分子若手研究会
    • Related Report
      2019 Research-status Report
  • [Patent(Industrial Property Rights)] 1)人工核酸コンジュゲートおよびその設計法2021

    • Inventor(s)
      櫻井 敏彦
    • Industrial Property Rights Holder
      櫻井 敏彦
    • Industrial Property Rights Type
      特許
    • Filing Date
      2021
    • Related Report
      2021 Annual Research Report

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

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