Sp1転写因子は,カスペーゼ依存およびカスペーゼ独立のアポプトシス経路を調整する
Takashi Hirose1, H Robert Horvitz
1Howard Hughes Medical Institute, Department of Biology, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA.
Nature
|July 16, 2013
まとめ
単一の転写因子SPTF-3は,C. elegansの発達におけるカスパーゼ依存性およびカスパーゼ独立性アポトーシス経路の両方を制御する. この発見は,細胞型特異のプログラム細胞死のための二価調節節節を明らかにしています.
科学分野:
- 発達生物学 発達生物学について
- 細胞生物学 細胞生物学
- 遺伝学 遺伝学とは
背景:
- アポトーシスの調節は,カスパースに依存する経路と,カスパースに依存しない経路の両方を含む動物の発達にとって極めて重要です.
- 単細胞内のこれらの異なった細胞死メカニズムの調整は,未だに十分に理解されていない.
研究 の 目的:
- カスパゼ依存およびカスパゼ独立のアポトーシス経路が,発達中の単細胞内でどのように調整されているかを調査する.
- 細胞型特異のプログラム細胞死を制御する規制メカニズムを特定する.
主な方法:
- モデル生物としてCaenorhabditis elegansを使用しました.
- Sp1転写因子SPTF-3が細胞死を決定する役割を研究した.
- egl-1とpig-1を含むSPTF-3の転写標的を分析した.
主要な成果:
- SPTF-3は,カスペーゼ依存 (EGL-1経由) とカスペーゼ独立 (Pig-1経由) のアポプトシス経路の両方を転写的に活性化します.
- SPTF-3は,特定のニューロン (M4運動ニューロン姉妹,AQR感覚ニューロン姉妹) のプログラム細胞死を制御する.
- 単一の転写因子は,2つの並列の細胞破壊プログラムを調整する.
結論:
- SPTF-3は,カスパース依存およびカスパース独立のアポトシスを統合する二価調節ノードとして機能します.
- このメカニズムは,細胞型特異的なアポトーシスの一般的な調節に関する洞察を提供します.
- このような調節節節節は,アポトーシスの失調を伴う疾患の治療標的を代表する可能性があります.
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