BETブロモドメイン阻害は,c-Mycを標的とする治療戦略として用いられる
Jake E Delmore1, Ghayas C Issa, Madeleine E Lemieux
1Department of Medical Oncology, Dana-Farber Cancer Institute, 450 Brookline Avenue, Boston, MA 02215, USA.
Cell
|September 6, 2011
まとめ
JQ1によるブロモドメイン阻害によるMYC転写をターゲットにすると,Myc依存遺伝子が効果的にダウンレギュレーションされます. このアプローチは,多発性骨髄腫およびMYCによって引き起こされる他のがんの治療に有望であることを示しています.
科学分野:
- 腫瘍学 腫瘍学
- 分子生物学は分子生物学である.
- がん遺伝学 がん遺伝学
背景:
- MYC腫瘍遺伝子は多くのヒトの癌を誘発しますが,直接的な治療戦略は依然として難解です.
- MYCががんの病原化に果たす役割は,その腫瘍性機能を標的とする新しいアプローチを必要とします.
研究 の 目的:
- MYCの活性を調節する戦略として,転写を調節するブロモドメインタンパク質を阻害する可能性を調査する.
- 小分子ブロモドメイン阻害剤JQ1のMYC転写を標的とし,その下流効果の有効性を評価する.
主な方法:
- 選択的ブロモドメイン阻害剤であるJQ1を使用して,転写調節に関与するBETブロモドメインタンパク質を標的とした.
- MYC転写と全ゲノムにわたるMyc依存遺伝子発現に対するBET阻害の影響を評価した.
- 多発性骨髄腫の実験モデルでJQ1の抗増殖効果を評価した.
主要な成果:
- JQ1は,BETブロモドメインタンパク質を選択的に抑制し,MYC転写のダウンレギュレーションにつながります.
- 全ゲノム分析により,BET抑制に伴うMyc依存性遺伝子の広範なダウンレギュレーションが明らかになりました.
- 多発性骨髄腫のモデルでは,JQ1は強力な抗増殖効果を示し,細胞サイクル停止と衰老を誘導しました.
結論:
- BETブロモドメインタンパク質は,MYC転写の重要なレギュレーターです.
- JQ1はMYC駆動の転写を効果的に標的にし,多発性骨髄腫の臨床前モデルで治療的可能性を示しています.
- BETブロモドメイン抑制は,MYC誘発悪性腫瘍に対する有望な治療戦略です.
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