多価小分子汎RAS阻害剤
Matthew E Welsch1, Anna Kaplan2, Jennifer M Chambers2
1Department of Chemistry, Columbia University, New York, NY 10027, USA.
Cell
|February 25, 2017
まとめ
研究者はRASタンパク質を標的にする新しい小分子を開発し,臨床前モデルで抗腫瘍活性を示しました. このパン-RAS阻害剤は新しいがん治療戦略として潜在性を示しています.
科学分野:
- 薬剤化学
- 腫瘍学
- 分子生物学
背景:
- タンパク質とタンパク質の相互作用 (PPI) は細胞シグナル伝達において極めて重要であり,その障害は治療の可能性を秘めています.
- RASタンパク質は 細胞成長の重要なレギュレータであり その腫瘍発生性突然変異が 多くの癌を誘発します
- 小分子によるRASエフェクタ相互作用をターゲットにすることは,がん治療の有望な戦略です.
研究 の 目的:
- 腫瘍性RASタンパク質を標的とした新しい小分子を設計し合成する.
- これらのパン-RASリガンドの結合親和性と細胞効果を評価する.
- 臨床前がんモデルにおける鉛化合物の治療の可能性を評価する.
主な方法:
- 腫瘍性KRASの隣接する部位を標的とする小分子による構造設計.
- パン-RASリガンドの合成と特徴付け
- マイクロスケールの熱泳,NMR,ITCを用いた化合物の結合の生体物理的検証.
- 細胞死亡率と代謝安定性の評価
- 異種移植のマウスモデルにおける抗腫瘍活性評価
主要な成果:
- 1つの化合物である3144は,複数の生体物理的手法によってRASタンパク質に結合することを実証した.
- 化合物3144は,RAS依存性の癌細胞における致死性を誘発した.
- この化合物は肝臓の微小体において代謝安定性を示した.
- 異種移植マウスのがんモデルでは,有意な抗腫瘍作用が観察されました.
結論:
- パン-RAS抑制は,ある種の癌に対する有効な治療戦略です.
- 構造ベースのアプローチを使用して設計された多価抑制剤は,タンパク質の表面を効果的に標的にすることができます.
- RASタンパク質を標的とする小さな分子は 将来の癌治療に 期待されています
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