ヒストン脱酸化酵素SIRT6は,がん代謝を制御する腫瘍抑制剤です
Carlos Sebastián1, Bernadette M M Zwaans, Dafne M Silberman
1The Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA 02114, USA.
Cell
|December 11, 2012
まとめ
SIRT6は,がん細胞の代謝を調節することによって,腫瘍抑制剤として作用します. SIRT6の喪失は腫瘍の成長と攻撃性を促進し,癌の発達と進行における重要な役割を強調しています.
科学分野:
- 腫瘍学 腫瘍学
- 分子生物学は分子生物学である.
- 癌の代謝について
背景:
- 細胞代謝の再プログラミングは,腫瘍の発達 (ウォーバーグ効果) に極めて重要です.
- がんにおける代謝変化を制御する分子メカニズムは,依然としてほとんど不明である.
- がん代謝におけるSIRT6の役割は,以前は解明されていなかった.
研究 の 目的:
- 癌細胞代謝の分子調節体を特定する.
- 腫瘍抑制剤としてのSIRT6の機能を調査する.
- 癌の確立と維持におけるSIRT6の役割を決定する.
主な方法:
- 条件付きSIRT6アレルをインビボ研究に使用した.
- 腫瘍の形成,成長,およびSIRT6の削除後の攻撃性を評価した.
- SIRT6によるエアロビック・グリコロシスの調節とMYCの転写活性を研究した.
- ヒトがんにおけるSIRT6発現を分析し,患者の予後と相関した.
主要な成果:
- SIRT6の消去は,腫瘍の数,サイズ,および攻撃性を有意に増加させました.
- SIRT6欠乏細胞は,強化された糖分解と腫瘍の成長を示した.
- SIRT6は,MYCの転写活動の抑制体として識別され,リボソーム代謝を調節します.
- ヒトのがんにおけるSIRT6のダウンレギュレーションは,予後不良と腫瘍フリー生存率の低下と相関していた.
結論:
- SIRT6は,がん代謝を抑制する重要な腫瘍抑制剤です.
- SIRT6の喪失は,がんの形成と維持の両方を促進する.
- SIRT6発現レベルは,いくつかのヒトがんの予後マーカーとして機能します.
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