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2022 Fiscal Year Annual Research Report

新規RNA編集酵素システムdCas13-ADARによる全長型ジストロフィン回復

Research Project

Project/Area Number 22F22414
Allocation TypeSingle-year Grants
Research InstitutionNational Center of Neurology and Psychiatry

Principal Investigator

青木 吉嗣  国立研究開発法人国立精神・神経医療研究センター, 神経研究所 遺伝子疾患治療研究部, 部長 (80534172)

Co-Investigator(Kenkyū-buntansha) SAIFULLAH  国立研究開発法人国立精神・神経医療研究センター, 神経研究所 遺伝子疾患治療研究部, 外国人特別研究員
Project Period (FY) 2022-11-16 – 2025-03-31
KeywordsRNA編集 / Duchenne型筋ジスト ロフィー
Outline of Annual Research Achievements

RNA編集はゲノム編集と異なり、ゲノムに対するオフターゲット変異挿入のリスクが無いことから、DMD遺伝子変異が原因のDuchenne型筋ジスト
ロフィーの新規治療法として期待されている。本研究では、細胞およびマウスを対象に、DMD遺伝子のナンセンス変異を新規mini dCas 13X.1-A
DAR1システムを用いたRNA編集により修復し、マウス骨格筋において全長ジストロフィンの発現を回復させることを目的とする。マウス骨格筋
におけるRNA編集効率やジストロフィン発現レベルの評価に加えて、安全性についても評価する。

Current Status of Research Progress
Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

特段の支障なく、計画通りに研究を進めている。

Strategy for Future Research Activity

ADAR1, ADAR2, and CRISPR-Cas 13X.1 plasmids will be ordered from Addgene. The
plasmid cloning will be done afterwards. An in vitro study using myotubes from DMD model mdx mice will be conducted to obtain a proof of concept. The restoration of full-length dystrophin protein will be confirmed at mRNA and protein levels. The Sanger sequencing for mRNA base editing, Immunofluorescence for dystrophin protein expression, and western blot for full-length protein expression will be considered as restoration validity tests. A suitable protocol for effective RNA editing will be optimized by exploring the following experiments: screening guide RNAs, titration of vector, screening editor enzyme, screening linker between the Editor and Cas13 protein, and off-target effect using RNA seq.

  • Research Products

    (3 results)

All 2022

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

  • [Journal Article] Development of Therapeutic RNA Manipulation for Muscular Dystrophy2022

    • Author(s)
      Saifullah, Motohashi N, Tsukahara T, Aoki Y.
    • Journal Title

      Front Genome Ed

      Volume: 4 Pages: 863651

    • DOI

      10.3389/fgeed.2022.863651.

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Integrated analysis of the clinical consequence and associated gene expression of ALK in ALK-positive human cancers.2022

    • Author(s)
      Saifullah, Tsukahara T.
    • Journal Title

      Heliyon

      Volume: 8 Pages: e09878

    • DOI

      10.1016/j.heliyon.2022.e09878.

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Integrated analysis of ALK higher expression in human cancer and downregulation in LUAD using RNA molecular scissors2022

    • Author(s)
      Saifullah, Tsukahara T.
    • Journal Title

      Clin Transl Oncol.

      Volume: 24 Pages: 1785-1799

    • DOI

      10.1007/s12094-022-02835-6.

    • Peer Reviewed / Open Access / Int'l Joint Research

URL: 

Published: 2023-12-25  

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