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オートファギーは,p62の除去を通じて腫瘍形成を抑制する
Robin Mathew1, Cristina M Karp, Brian Beaudoin
1University of Medicine and Dentistry of New Jersey, Robert Wood Johnson Medical School, Piscataway, NJ 08854, USA.
Cell
|June 16, 2009
まとめ
癌細胞の自性欠陥はp62/SQSTM1 (p62) の蓄積につながり,酸化ストレスを引き起こし,腫瘍の成長を促します. p62の調節を回復することは,がんの発達と潜在的な治療法を理解するために不可欠です.
科学分野:
- 細胞生物学 細胞生物学
- 腫瘍学 腫瘍学
- 分子生物学は分子生物学である.
背景:
- オートファギーは,損傷した成分を分解する細胞プロセスです.
- オートファジー遺伝子のbeclin1の喪失は,がんの発症と関連しています.
- 腫瘍細胞はストレスから脱出するためにオートファギーを用いますが,欠陥は逆説的に癌を促します.
研究 の 目的:
- 腫瘍の進行におけるオートファギーの欠陥の役割を調査する.
- オートファギーの欠乏が,特定のタンパク質の蓄積と細胞損傷につながる方法を理解する.
- p62/SQSTM1の蓄積と腫瘍発生の関連性を調査する.
主な方法:
- オートファギー欠陥腫瘍細胞の分析.
- p62/SQSTM1,ERチャペロン,損傷したミトコンドリア,および活性酸素種 (ROS) を含む蓄積された細胞成分の評価.
- ROSとp62抑制がオートファギーの欠陥に起因するダメージに与える影響を調査する.
主要な成果:
- オートファギー欠陥腫瘍細胞はp62/SQSTM1,ERチャペロン,損傷したミトコンドリア,ROSを蓄積し,ゲノム損傷を示します.
- ROSまたはp62の抑制は,オートファギーの欠陥によって引き起こされる損傷を防止し,p62の失調が酸化ストレスを誘発することを示しています.
- 持続的なp62発現はNF-kappaBのシグナル伝達と遺伝子発現を変化させ,腫瘍発生を促進した.
結論:
- 欠陥のあるオートファギーは,腫瘍におけるp62/SQSTM1のアップレギュレーションにつながり,がんの進行に寄与する.
- オートファギーの欠陥によるp62/SQSTM1の蓄積は,重要なシグナル伝達経路を混乱させ,腫瘍生成を誘導する.
- P62調節をターゲットにすることで,オートファギーの欠陥のあるがんの治療戦略を提供することができる.
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