β-カタニン/B細胞リンパ腫9のタンパク質相互作用のための選択性小分子阻害剤の合理的な設計
Logan R Hoggard1, Yongqiang Zhang1, Min Zhang1
1Department of Chemistry, Center for Cell and Genome Science, University of Utah , Salt Lake City, Utah 84112-0850, United States.
Journal of the American Chemical Society
|September 10, 2015
まとめ
研究者は,アルファヘリックスタンパク質とタンパク質の相互作用 (PPI) を選択的に阻害する小さな有機分子を設計しました. これらの新しい阻害剤はベータ-カテニン/BCL9の相互作用を標的とし,がん治療の可能性を秘めています.
科学分野:
- 薬剤化学
- 化学生物学
- 分子生物学
背景:
- アルファヘリックス媒介タンパク質相互作用 (PPI) は生物学的プロセスにおいて極めて重要です.
- これらのPPIを小分子で標的化することで 治療の可能性が生まれます
- ホットスポット相互作用を理解することは,選択的阻害剤を設計するための鍵です.
研究 の 目的:
- アルファヘリックス媒介PPIを選択的に阻害する小さな有機分子を設計し合成する.
- ベータ-キャテニン/カデリン PPIよりもベータ-キャテニン/BCL9 PPIを標的とする阻害剤を開発する.
- Wnt/β-カタニン依存がんにおけるこれらの阻害剤の治療の可能性を調査する.
主な方法:
- ホットスポット特性を特定するためにHippDBデータベースを使用するタンパク質データバンクのデータマイニング.
- アルファヘリクスのホットスポット結合を模倣した汎用脚架の設計.
- 小分子阻害剤の合成と特徴付け
- サイト指向型変異および構造-活性関係 (SAR) 研究により,結合モードを決定する.
主要な成果:
- ホットスポット分析を基に新しいジェネリック・スキャフォードが設計された.
- ベータ- カテニン/ BCL9 PPIを選択する一連の小分子阻害剤を合成した.
- 阻害剤は,β-カタニン/カデリンよりもベータ-カタニン/BCL9の相互作用を選択的に妨害することが示された.
- 抑制剤はWntシグナル伝達を抑制し,標的遺伝子を抑制し,がん細胞の成長を抑制しました.
結論:
- アルファヘリックスPPIの選択的阻害は小有機分子で達成可能である.
- 設計された阻害剤は,Wnt/β-cateninシグナリングをターゲットにする新しい戦略を提供します.
- これらの発見は,関連する癌の新たな治療法の開発に道を開きます.
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