タンパク質を標的とする小分子薬のリボヌクレアースリクルートによるRNAへの再プログラム
Peiyuan Zhang1, Xiaohui Liu1, Daniel Abegg1
1Department of Chemistry, Scripps Research, Jupiter, Florida 33458, United States.
Journal of the American Chemical Society
|August 13, 2021
まとめ
ドビチニブを前駆体マイクロRNA-21 (pre- miR-21) を標的とするように再使用することで,選択性が劇的に改善されました. この新しいキメラは miR-21を分解し マウスモデルで病気を緩和しました
科学分野:
- 生物化学
- 分子生物学
- 薬物の発見
背景:
- 既存の薬物を新しい標的,特にRNAに再プログラムすることは,重要な選択性課題を提示します.
- ドビチニブのようなレセプターチロシンキナーゼ (RTK) 阻害剤はタンパク質標的と相互作用しますが,それらのRNA結合はあまり研究されていません.
研究 の 目的:
- ドビチニブのRNA構造への結合を調査する.
- 標的型RNA分解のためのキメリック化合物を合理的に設計する.
- 前体マイクロRNA-21 (pre- miR-21) の選択性を高め,治療の可能性を評価する.
主な方法:
- RNAの折りたたみと小分子薬の結合相互作用を研究した.
- ドビチニブがpre- miR-21に結合することが確認された.
- RNase LにリンクされたRNA認識要素としてドビチニブを用いたキメリック化合物を設計した.
- 細胞とマウスのモデルで化合物の活性と選択性を評価した.
主要な成果:
- ドビチニブは,pre- miR-21に結合することが判明した.
- キメリック化合物は,従来のRTK標的に対して,pre- miR-21の選択性を2500倍に示した.
- このキメラは miR-21 の触媒分解を効果的に誘導した.
- 三重陰性乳がんとアルポート症候群のマウスモデルで治療効果が観察されました.
結論:
- 化学化合物による標的型RNA分解は,異なるバイオ分子タイプ (タンパク質対RNA) でさえも,高い選択性を達成することができる.
- このアプローチは,特定のRNAの過剰発現によって引き起こされる病気に対する新しい治療法の開発に有望な戦略を提供します.
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