p66shcアダプタータンパク質は,哺乳類の酸化ストレス反応と寿命を制御する
E Migliaccio1, M Giorgio, S Mele
1Department of Experimental Oncology, European Institute of Oncology, Milan, Italy.
Nature
|December 2, 1999
まとめ
マウスのp66shc遺伝子をターゲットにすることで,ストレスに対する細胞の抵抗性を高め,寿命を大幅に延長します. この発見は,哺乳類のストレス反応機構と老化過程に光を当てています.
科学分野:
- 細胞生物学 細胞生物学
- 遺伝学 遺伝学とは
- ゲロントロジーはゲロントロジーの学科です.
背景:
- 無脊椎動物の遺伝子変異は,寿命を延ばし,ストレス耐性を高めることができます.
- 哺乳類のストレス反応メカニズムと寿命を調節するメカニズムは十分に理解されていません.
- 哺乳類の既知の遺伝子は,個々の寿命を延ばすことが示されていない.
研究 の 目的:
- 哺乳類のストレス反応と寿命におけるp66shc遺伝子の役割を調査する.
- p66shcの変異が環境的ストレスに対する細胞抵抗性に影響するかどうかを判断する.
- 哺乳類における老化の調節剤としてのp66shcの可能性を調査する.
主な方法:
- マウスp66shc遺伝子の標的型変異.
- 細胞アポトーシスとストレス抵抗 (H2O2,紫外線,パラクワット) の評価.
- p66shcノックアウト細胞におけるp53およびp21ストレス反応経路の分析.
- p66shc ノックアウトマウスの寿命の測定.
主要な成果:
- p66shcは,酸化的および紫外線ストレスに反応してセリンリン酸化されます.
- p66shcの消去は,アポトーシスに対する細胞抵抗性を高めます.
- p66shcノックアウト細胞は,p53とp21のストレス反応が低下していることを示しています.
- p66shc ノックアウトマウスは,パラクアットに対する耐性が高く,寿命が30%長くなっています.
結論:
- p66shcは,哺乳類のストレス誘発アポトーシスにおいて重要な役割を果たしています.
- p66shc遺伝子は,ストレス反応と寿命を調節する信号伝達経路の重要な構成要素です.
- p66shcをターゲットにすることで,哺乳類の老化とストレス抵抗を調節するための新しい戦略を提供することができる.
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