アロステリックをATP結合部位阻害剤と組み合わせることで,Bcr-Ablを標的とする
Jianming Zhang1, Francisco J Adrián, Wolfgang Jahnke
1Dana-Farber Cancer Institute, Harvard Medical School, Department of Cancer Biology, Seeley G. Mudd Building 628, Boston, Massachusetts 02115, USA.
Nature
|January 15, 2010
まとめ
研究者らは,Bcr-Ablミリスタート結合部位を標的としたアロステリック阻害剤であるGNF-5を開発した. GNF-5とATP競合薬の組み合わせは抵抗を克服し,Bcr-Abl駆動がんの治療に希望を示しています.
科学分野:
- 腫瘍学 腫瘍学
- 薬理学 薬理学とは
- 構造生物学 構造生物学とは
背景:
- ATP結合部位阻害剤に対する耐性は,Bcr-Abl陽性がんの治療における大きな課題である.
- アロステリック阻害剤は,既存の抵抗機構を克服するための潜在的な戦略を提供します.
研究 の 目的:
- アロステリックBcr-Abl阻害剤GNF-2の結合メカニズムを特徴づける.
- 耐性Bcr-Abl変異に対するATP競争性阻害剤と組み合わせたGNF-5の有効性を評価する.
主な方法:
- 溶液NMRとX線結晶学で,GNF-2結合部位と構造的効果を決定する.
- サイト指向型変異および構造動力学のための水素-デウテリウム交換質量スペクトロメトリ (HDX-MS).
- T315I変異体に対するT315I変異体を含む,インビトロ生化学および細胞測定法.
- ネズミの骨髄移植モデルにおけるin vivo有効性研究.
主要な成果:
- GNF-2はAblのミリスタート結合部位と結合し,ATP結合部位の構造変化を誘発する.
- GNF-5はイマチニブまたはニロチニブと併用して,耐性変異を in vitroで防止しました.
- 併用療法では,T315I Bcr-Abl変異体に対する添加活性が示されました.
- GNF-5は,臨床前のモデルでT315I変異体に対する in vivo の有効性を実証しました.
結論:
- ミリスタート結合部位を標的とする阻害剤は,Bcr-Abl.に対する有効な治療戦略を提供します.
- アロステリックおよびATP競争性阻害剤の組み合わせは,Bcr-Abl標的治療に対する耐性を克服するのに有効です.
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