SRC-ファミリーの不可逆的なキナーゼ阻害剤によって,異なる活性部位核性体を選択的に標的にする
Nathan N Gushwa1, Sumin Kang, Jing Chen
1Howard Hughes Medical Institute, Department of Cellular and Molecular Pharmacology, University of California, San Francisco, San Francisco, California 94158, United States.
Journal of the American Chemical Society
|November 30, 2012
まとめ
新しい化学探査機は,生体細胞のSrcファミリーキナーゼを正確に標的にしています. これらのツールは,薬剤の選択性を理解し,ポナチニブのような治療によってどのキナーゼが影響を受けるかを特定するのに役立ちます.
科学分野:
- バイオケミストリー バイオケミストリー
- 化学生物学 化学生物学とは
- 薬理学 薬理学とは
背景:
- Src-ファミリーのキナーゼは,人間の健康と病気において極めて重要です.
- これらのキナーゼを標的とする既存の薬は,選択性が欠けている.
- 生体細胞におけるキナーゼの選択性を評価することは困難です.
研究 の 目的:
- Src-ファミリーキナーゼのための新しい化学探査機の設計と検証.
- 細胞内の内生キナーゼの選択的ラベリングとプロファイリングを可能にします.
- Src-ファミリーキナーゼに対するポナチニブ薬の選択性を調査する.
主な方法:
- アルキンタグを搭載した2つの核酸基化学探査機 (1と2) の開発.
- 探査機1は保存されたライシンを標的にし,探査機2は変数システインを標的にする.
- 完ぺきな細胞におけるキナーゼ阻害剤の競争的なプロファイリングのための探査機を使用する.
主要な成果:
- 両探査機とも,細胞内の意図された内生性キナーゼ標的を効率的に標識した.
- 探査機1は広範な反応性を示し,探査機2は特定のキナーゼに対する選択性を示した.
- ポナチニブは,T細胞キナーゼLckを選択的に抑制し,FynまたはSrcに最小限の影響を及ぼしました.
結論:
- 開発された化学探査機は,生物系におけるSrc系キナーゼの正確なプロファイリングを可能にします.
- これらの探知器は,異なるキナーゼサブセットに対する薬物選択性の評価を容易にする.
- 発見は,Src-ファミリー内のLckに対するポナチニブの特定の抑制作用を明らかにします.
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