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Elucidation of intracerebral distribution of CAG repeat binding molecules after intranasal administration and verification of effect on repeat contraction.

Research Project

Project/Area Number 21K19049
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 37:Biomolecular chemistry and related fields
Research InstitutionOsaka University

Principal Investigator

Shibata Tomonori  大阪大学, 産業科学研究所, 招へい教員 (80711960)

Project Period (FY) 2021-07-09 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2022: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2021: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Keywords経鼻投与 / CAGリピート / ハンチントン病 / 全脳イメージング / CAGリピート結合分子 / 組織透明化
Outline of Research at the Start

本研究では、ハンチントン病の原因となるCAGリピートを短縮する低分子(NA)を標的部位である脳線条体へと送達する方法を探索するとともに投与後のNAの脳内動態を明らかにする。脳内へのNAの送達は、血液脳関門(BBB)により血中から脳内への移行が制限されているため、BBBを介さずに鼻腔から薬剤を脳内へと送達可能な経鼻投与による送達を検証する。経鼻投与後のNAの脳内分布を明らかにし、NAの脳内動態とリピート短縮誘導効率の関係を明らかにする。

Outline of Final Research Achievements

Huntington's disease is an incurable disorder in which neurons in the brain striatum are degenerated due to aberrant expansion of CAG repeats. We have found that direct administration of a CAG repeat-binding small molecule (NA) into the brain striatum of a mouse model of Huntington's disease resulted in the contraction of aberrantly expanded CAG repeats. Because of the limited transfer of NA from the blood to the brain, NA administration is limited to the invasive method of direct administration to the brain striatum. In this study, we analyzed the drug delivery pathway and the intracerebral distribution of an NA derivative after noninvasive intranasal administration by three-dimensional whole-brain imaging using a combination of tissue clearing and light sheet fluorescence microscopy.

Academic Significance and Societal Importance of the Research Achievements

NAは、ハンチントン病のマウスモデルにおいて異常に伸長したCAGリピートを短縮する画期的な低分子である。将来のハンチントン病治療においては、NAを脳内へと送達すること重要な課題であり、本研究により明らかとなった経鼻投与後のNAの脳内動態はNAの治療効果を検証していく上で重要な知見になると考えられる。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (8 results)

All 2023 2022 2021

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

  • [Journal Article] Intracerebral Distribution of CAG Repeat-Binding Small Molecule Visualized by Whole-Brain Imaging2023

    • Author(s)
      Murakami Eitaro、Nakamori Masayuki、Nakatani Kazuhiko、Shibata Tomonori、Tainaka Kazuki
    • Journal Title

      Bioconjugate Chemistry

      Volume: 34 Issue: 12 Pages: 2187-2193

    • DOI

      10.1021/acs.bioconjchem.3c00470

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A small molecule binding to TGGAA pentanucleotide repeats that cause spinocerebellar ataxia type 312023

    • Author(s)
      Shibata Tomonori、Nakatani Kazuhiko
    • Journal Title

      Bioorganic & Medicinal Chemistry Letters

      Volume: 79 Pages: 129082-129082

    • DOI

      10.1016/j.bmcl.2022.129082

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Presentation] RNA反復配列を標的とした光応答性リガンドによる細胞内RNA fociの形成制御2023

    • Author(s)
      藤原 侑亮、柴田 知範、堂野 主税、中谷 和彦
    • Organizer
      日本化学会第103春季年会
    • Related Report
      2022 Research-status Report
  • [Presentation] Control of RNA Foci Formation by Photo-Switchable Ligands2022

    • Author(s)
      Yusuke Fujiwara, Tomonori Shibata, Chikara Dohno, Kazuhiko Nakatani
    • Organizer
      The 49th International Symposium on Nucleic Acids Chemistry
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Evaluation of APOBEC-catalyzed cytosine deamination for the repeat DNAs2022

    • Author(s)
      Luyan Zhang, Tomonori Shibata, Asako Murata, Kazuhiko Nakatani
    • Organizer
      The 49th International Symposium on Nucleic Acids Chemistry
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Alleviation of RNA toxicity by a small molecule targeting UGGAA repeat in spinocerebellar ataxia type 312022

    • Author(s)
      Tomonori Shibata, Konami Nagano, Morio Ueyama, Kensuke Ninomiya, Tetsuro Hirose, Yoshitaka Nagai, Kinya Ishikawa, Gota Kawai, Kazuhiko Nakatani
    • Organizer
      NEURO2022
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] 全脳イメージングを用いたCAGリピート結合分子の脳内分布解析2022

    • Author(s)
      村上英太郎、柴田知範、中森雅之、田井中一貴、中谷和彦
    • Organizer
      RNAフロンティアミーティング
    • Related Report
      2022 Research-status Report
  • [Presentation] 全脳イメージングを用いたCAGリピート結合分子の薬物動態解析2021

    • Author(s)
      ○村上英太郎、柴田知範、中森雅之、田井中一貴、中谷和彦
    • Organizer
      日本ケミカルバイオロジー学会 第15回年会
    • Related Report
      2021 Research-status Report

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Published: 2021-07-13   Modified: 2025-01-30  

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