構造を標的とするリガンドによる腫瘍性マイクロRNA17-92クラスタの標的化された分解
Xiaohui Liu1, Hafeez S Haniff1, Jessica L Childs-Disney1
1Department of Chemistry, The Scripps Research Institute, 130 Scripps Way, Jupiter, Florida 33458, United States.
Journal of the American Chemical Society
|April 3, 2020
まとめ
研究者らは,がんのような疾患における重要な役割を果たすマイクロRNA-17-92クラスタを阻害する新しいRNA標的化合物を開発しました. これらの化合物は選択的に疾患に関連したマイクロRNAレベルを低下させ,臨床前モデルでフェノタイプを救出しました.
科学分野:
- 分子生物学
- RNAセラピー
- 薬剤化学
背景:
- 異常なRNA発現は病気に寄与する
- マイクロRNA-17-92 (pri- miR-17-92) クラスタは,様々な疾患に関与しています.
- miRNAバイオゲネシスをターゲットにすることで 治療戦略が提供されます
研究 の 目的:
- pri-miR-17-92クラスタを標的とした配列固有のリガンドを設計する.
- クラスター内の特定のmiRNAsの生体生成を阻害する.
- 治療目的のRNA標的化合物を開発する
主な方法:
- 構造特異のRNAリガンドの配列ベースの設計
- リガンドを二重分子に最適化して結合を強化する.
- ブレオミシンA5へのリガンドの結合またはリボヌクレアース標的キメラ (RIBOTACs) の開発.
- 疾患モデルにおける化合物の有効性の評価
主要な成果:
- miR-17,miR-18a,miR-20aのDicer処理部位を標的にする二重分子が,100倍以上の効能で開発されました.
- ダイマー- ブレオミシン結合体は,pri- miR-17-92のクラスタ全体を分裂させ,すべての6つのmiRNAを抑制した.
- 多囊性腎臓病,前立腺がん,乳がんのモデルにおける pri- miR-17-92 レベルの選択的低下と疾患のフェノタイプの救済.
- ブレオミシン結合は,前立腺がん細胞に選択的なmiRNomeおよびproteome効果を示した.
- RIBOTACは選択的に先行および成熟したmiRNAを枯渇させましたが,プライマリトランスクリプトは減少させませんでした.
結論:
- RNA構造を標的とする化合物は,特定の治療効果のために調整できます.
- pri-miR-17-92クラスタをターゲットにすることは,関連疾患の治療のための実行可能な戦略です.
- 開発された化合物は,選択的なRNA分裂と治療的介入の可能性を示しています.
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