細胞における非ATGトランスレーションイベントの抑制は,RNAを標的とする共振性小分子による
Wang-Yong Yang1, Henry D Wilson1, Sai Pradeep Velagapudi1
1†Department of Chemistry, The Scripps Research Institute, Scripps Florida, 130 Scripps Way, Jupiter, Florida 33458, United States.
Journal of the American Chemical Society
|April 1, 2015
まとめ
新しい化学探査機は,Fragile X関連震/不発症症候群 (FXTAS) を引き起こす有毒なRNAの繰り返しを標的とする. これらの小さな分子は,RNAのスプライシングを改善し,正常な翻訳に影響を与えることなく,有害なタンパク質の生産を減らす.
科学分野:
- RNA 生物学 RNA 生物学
- 化学生物学 化学生物学とは
- 神経遺伝学 神経遺伝学
背景:
- 拡張された反復RNAは,タンパク質連結と反復関連非AUG (RAN) 翻訳のようなメカニズムを通じて病気を引き起こす.
- 脆弱なX関連震/無力症候群 (FXTAS) は,FMR1遺伝子の5'未翻訳領域の拡張されたr(CGG) リピートに関連しています.
研究 の 目的:
- 拡張されたr(CGG) リピートで特異的に結合し反応する化学探査機を開発し,特徴づけること.
- RNA媒介性疾患の病理を修正するためのこれらの化学探査機の治療の可能性を調査する.
主な方法:
- Chem-CLIP-Map (Chemical Crosslinking, Immunoprecipitation, and Sequencing) は,細胞内のRNAの小さな分子結合部位をマッピングするために使用されました.
- 化学プローブとオリゴヌクレオチドがプレ-mRNAスプライシングとRANトランスレーションに与える影響を評価するためにアッセイが行われました.
主要な成果:
- 化学探査機は,細胞内の拡張されたr ((CGG) リピートに特異的に結合することが示されました.
- 開発された化合物は,FXTASに関連したプレ-mRNAスプライシングの欠陥を効果的に改善し,カノニカル翻訳に影響を与えることなく,RAN翻訳を減少させた.
- 同じRNAの繰り返しを標的とするオリゴヌクレオチドは,ポリソーム負荷を減らすことにより,RANとカノニカルトランスレーションの両方を損なう.
結論:
- デザイナーの小分子は,結合部位の特定を含む,細胞内のRNA標的のプロファイリングのための効果的なツールとして機能することができます.
- 反応性小分子は,FXTASモデルで実証されたように,RNA媒介疾患の病理学を調節するために,オリゴヌクレオチドよりも潜在的に有益な治療アプローチを提供します.
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