• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

International research project on nucleic acid aptamers and their exosome-based application to therapeutics for synucleinopathy

Research Project

Project/Area Number 20KK0126
Research Category

Fund for the Promotion of Joint International Research (Fostering Joint International Research (B))

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

Principal Investigator

Murakami Kazuma  京都大学, 農学研究科, 准教授 (80571281)

Co-Investigator(Kenkyū-buntansha) 泉尾 直孝  富山大学, 学術研究部薬学・和漢系, 助教 (50722261)
水口 賢司  大阪大学, 蛋白質研究所, 教授 (50450896)
Project Period (FY) 2020-10-27 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥18,720,000 (Direct Cost: ¥14,400,000、Indirect Cost: ¥4,320,000)
Fiscal Year 2022: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
Fiscal Year 2021: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2020: ¥6,890,000 (Direct Cost: ¥5,300,000、Indirect Cost: ¥1,590,000)
Keywordsアプタマー / エクソソーム / 神経変性疾患 / 計算科学 / 核酸医薬 / ドラッグデリバリーシステム / αシヌクレイン / 国際共同研究
Outline of Research at the Start

RNAアプタマーは、標的分子に対する高い結合能と選択性を特徴とする。凝集性タンパク質であるαシヌクレイン(αSyn)は、神経変性疾患の原因物質の一つである。本研究では、長年難題であるαSynのN末領域認識薬の開発と治療応用を目的として、独自のRNA選抜法とin silico解析を駆使して、αSynのN末特異的なRNAアプタマーを作製する。また、米国研究者とin-cell抗凝集能を調べ、高い活性をもつアプタマーについて、豪州研究者と協同で血液脳関門への透過性を高めた人工エクソソームに封入し、モデル動物を用いて治療効果を調べる。本研究は、世界初のアプタマーによる神経変性疾患治療を目指すものである。

Outline of Final Research Achievements

RNA aptamers are characterized with high affinity and selectivity to target molecules. This study aimed to develop an RNA aptamer for the N-terminal region of α-synuclein (αSyn), a presynaptic neuronal protein that is linked genetically and neuropathologically to Parkinson's disease (PD), and to establish its therapeutic basis. Using in vitro SELEX and in silico analysis, anti-N-terminal RNA aptamer (1R6) was obtained. 1R6 strongly inhibited in vitro aggregation and intercellular transmission of αSyn. The binding of 1R6 to intracellular accumulations of αSyn in a mouse model of Parkinson’s disease indicates that 1R6 could be a promising drug lead for the treatment of synucleinopathies. Moreover, we developed a technological basis using artificial exosomes with the enhanced permeability to the blood-brain barrier, so the efficient brain delivery toward therapeutics is expected.

Academic Significance and Societal Importance of the Research Achievements

αSyn凝集体の蓄積はパーキンソン病の病理的特徴の一つであることから,その検出薬は研究を進める上で重要である.しかし従来の検出薬は分解や切断を受けやすいαSynのC末領域に対するものが大半であり,凝集に重要なN末領域は正電荷をもつ繰返し配列が集中することから,抗体には認識されにくいという長年の課題があった.そこで負電荷が多いRNAアプタマーは,本課題の打開策になりうると考えた末,1R6の開発に成功した.1R6は従来抗体では認識できなかったαSyn凝集体を捉えている可能性があり,学術的意義は高い.脳内送達を可能にする人工エクソソーム技術と組み合わせることで治療応用が期待され,社会的にも意義深い.

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (19 results)

All 2023 2022 Other

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

  • [Int'l Joint Research] University of California Los Angeles(米国)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] Victoria University(オーストラリア)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] University of California Los Angeles(米国)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Victoria University(オーストラリア)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] University of California Los Angeles(米国)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] La Trobe University(オーストラリア)

    • Related Report
      2020 Research-status Report
  • [Journal Article] 神経疾患に対する核酸医薬:アプタマー医薬2023

    • Author(s)
      村上一馬
    • Journal Title

      脳神経内科

      Volume: -

    • Related Report
      2022 Annual Research Report
  • [Journal Article] Interactions of amyloid coaggregates with biomolecules and its relevance to neurodegeneration2022

    • Author(s)
      Murakami K, Ono K.
    • Journal Title

      The FASEB Journal

      Volume: 36 Issue: 9

    • DOI

      10.1096/fj.202200235r

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Aptamers targeting amyloidogenic proteins and their emerging role in neurodegenerative diseases2022

    • Author(s)
      Murakami Kazuma、Izuo Naotaka、Bitan Gal
    • Journal Title

      Journal of Biological Chemistry

      Volume: 298 Issue: 1 Pages: 101478-101478

    • DOI

      10.1016/j.jbc.2021.101478

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] アミロイドタンパク質を認識する核酸アプタマー2023

    • Author(s)
      村上一馬
    • Organizer
      日本薬学会北陸支部特別講演会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] アミロイド蛋白質を認識する核酸アプタマー2023

    • Author(s)
      村上一馬
    • Organizer
      第14回タンパク質の異常凝集とその防御・修復機構に関する研究会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Development of RNA aptamers that recognizes amyloid key structures2022

    • Author(s)
      Kazuma Murakami
    • Organizer
      Special seminar in Neurology at UCLA
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] アミロイドタンパク質を認識する核酸アプタマーの創製と応用2022

    • Author(s)
      村上一馬
    • Organizer
      日本農芸化学会2022年度大会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Remarks] 京都大学大学院農学研究科食品生物科学専攻生命有機化学分野(研究代表者の所属研究室)ホームページ

    • URL

      http://www.orgchem.kais.kyoto-u.ac.jp

    • Related Report
      2022 Annual Research Report 2021 Research-status Report 2020 Research-status Report
  • [Remarks] 京都大学教育研究活動データベース

    • URL

      https://kyouindb.iimc.kyoto-u.ac.jp/j/zP8kX

    • Related Report
      2022 Annual Research Report
  • [Remarks] Kudos

    • URL

      https://www.growkudos.com/publications/10.1096%25252Ffj.202200235r/reader

    • Related Report
      2022 Annual Research Report
  • [Remarks] 京都大学教育研究活動データベース(村上一馬)

    • URL

      https://kyouindb.iimc.kyoto-u.ac.jp/j/zP8kX

    • Related Report
      2021 Research-status Report 2020 Research-status Report
  • [Patent(Industrial Property Rights)] RNAアプタマー2023

    • Inventor(s)
      村上一馬
    • Industrial Property Rights Holder
      村上一馬
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2023-023603
    • Filing Date
      2023
    • Related Report
      2022 Annual Research Report
  • [Patent(Industrial Property Rights)] エクソソームの調製法2022

    • Inventor(s)
      泉尾直孝
    • Industrial Property Rights Holder
      泉尾直孝
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2022-141796
    • Filing Date
      2022
    • Related Report
      2022 Annual Research Report

URL: 

Published: 2020-10-29   Modified: 2024-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi