タンパク質とヌクレオチドのバイオシンセシスは,単一の速度制限酵素,PRPS2によって結合され,がんを駆動します
John T Cunningham1, Melissa V Moreno1, Alessia Lodi2
1School of Medicine and Department of Urology, Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, San Francisco, CA 94158, USA.
Cell
|May 27, 2014
まとめ
Mycの腫瘍遺伝子は,PRPS2酵素を通じてタンパク質と核酸の合成を調整することで,がんを誘発する. この重要なリンクは,腫瘍の成長に不可欠であり,新しい治療標的を提示します.
科学分野:
- 腫瘍学 腫瘍学
- 分子生物学は分子生物学である.
- バイオケミストリー バイオケミストリー
背景:
- 癌細胞は,持続的な増殖のために,強力な生物合成を必要とします.
- 癌における代謝,タンパク質合成,核酸生成の連携は,完全に理解されていません.
研究 の 目的:
- Myc腫瘍遺伝子が癌細胞におけるタンパク質と核酸の生物合成を調節するメカニズムを解明する.
- この調整されたアナボリックプロセスに関与する重要な酵素と規制要素を特定する.
主な方法:
- Myc変換細胞とPrps2ノックアウトマウスモデルを使用した.
- 核酸バイオシンセシスにおけるフォスフォリボシル-パイロフォスファート合成酵素2 (PRPS2) の役割を調査した.
- Prps2 5' UTRの規制要素と,MycとeIF4Eによる制御を分析した.
主要な成果:
- Myc駆動がんにおける核酸生物合成を促進する速度制限酵素としてPRPS2を特定した.
- PRPS2が,MycとeIF4Eによって調節される5' UTRを通じて,タンパク質とヌクレオチドの合成をカップル化することを示した.
- ノックアウトマウスモデルを用いて,Myc駆動腫瘍形成におけるPRPS2の重要な役割を示した.
結論:
- 癌細胞の生存に不可欠な,翻訳的に調節されたアナボリック回路を発見した.
- Myc駆動がんにおけるバイオシンセシスの重要なコーディネーターとしてPRPS2を強調した.
- Myc.のような"治療できない"腫瘍遺伝子の新たな脆弱性を特定した.
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