RNA構造とX不活性化を妨げる化合物でXistを標的にする
Rodrigo Aguilar1,2,3, Kerrie B Spencer4, Barry Kesner1,2
1Department of Molecular Biology, Massachusetts General Hospital, Boston, MA, USA.
Nature
|March 31, 2022
まとめ
研究者は,非コーディングRNA (ncRNA) を標的とする小分子を見つけるためのスクリーニング方法を開発しました. 彼らはXist ncRNAを結合し,その機能を破壊し,細胞の成長を阻害し,薬の開発のための新しい道を開く化合物を特定しました.
科学分野:
- ゲノミクス
- 分子生物学
- 薬物の発見
背景:
- 人間のゲノムの大半はノンコーディングRNA (ncRNA) であるが,薬は主にタンパク質を標的とする.
- ncRNAを標的にすることは,その構造的柔軟性と構造的複雑性のために困難です.
- より多くの疾患がncRNAと関連しており,ncRNAを標的とする薬の必要性を強調しています.
研究 の 目的:
- ncRNAを結合する小分子を特定するためのスクリーニング戦略を策定する.
- Xist ncRNAを標的とする小分子を特定し,特徴づけること.
- Xist ncRNA ターゲティングの機能的影響を調査する.
主な方法:
- ncRNAを結合する小分子を識別するためのスクリーニング戦略を開発した.
- 化合物のXist ncRNAへの結合をテストするために,in vitroおよびin vivoアッセイを用いる.
- RNAの形状を分析するために小角X線散射を用いた.
- タンパク質の相互作用,表遺伝的変化,細胞プロセスに対する化合物結合の影響を評価した.
主要な成果:
- Xist ncRNAのRepAモチーフを特異的に結合する薬のような小分子 (X1) を特定した.
- X1結合はRepAの形状の柔軟性を低下させる.
- X1はPRC2とSPENのタンパク質を異動させ,H3K27トリメチル化を抑制し,X染色体の不活性化を抑制する.
- X1は細胞の分化と成長の女性特有の阻害を示す.
結論:
- ncRNAは薬剤のような化合物によって体系的に標的にされる.
- 小さな分子は RNAの構造と表遺伝子機能を 破壊する可能性があります
- このアプローチは,ncRNAに関連する疾患を標的とした薬の開発の化学的空間を拡大します.
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