マトリックス金属タンパク質酵素のS-ニトロシル化:神経細胞死へのシグナル伝達経路
Zezong Gu1, Marcus Kaul, Boxu Yan
1Center for Neuroscience and Aging, Program in Cell Adhesion and Extracellular Matrix Biology, The Burnham Institute, 10901 North Torrey Pines Road, La Jolla, CA 92037, USA.
Science (New York, N.Y.)
|August 17, 2002
まとめ
神経変性や脳卒中において極めて重要なマトリックス金属タンパク質酵素 (MMPs) の活性化には,S-ニトロシル化が含まれます. このプロセスはMMP-9を活性化させ,新しい細胞外タンパク質分解経路を通じて神経細胞のアポトーシスを引き起こします.
科学分野:
- 神経科学は神経科学である.
- バイオケミストリー バイオケミストリー
- 病理学 パトロジー
背景:
- マトリックス金属タンパク質酵素 (MMPs) は,神経変性疾患や脳卒中において重要な役割を果たします.
- これらの条件下でのMMP活性化の正確なメカニズムは完全に理解されていません.
研究 の 目的:
- 神経学的疾患の文脈におけるMMP活性化のメカニズムを解明する.
- MMPの活性化とニューロン細胞死におけるS-ニトロシル化の役割を調査する.
主な方法:
- 脳性イシュケミアのインビオ研究.
- MMP-9の活性化を評価するためのインビトロ実験.
- MMP-9の誘導体を特定するための質量スペクトロメトリ.
- ニューロンのアポトーシスの分析.
主要な成果:
- MMP-9は,脳性イシュケミア中にニューロン酸化窒素合成酵素とコロカライズすることが判明しました.
- S-ニトロシライゼーションはMMP-9をインビトロで活性化させ,ニューロンアポトーシスを誘発することが示されました.
- 質量スペクトロメトリーは,S-ニトロシル化によって形成された,MMP-9の安定した硫黄酸または硫黄酸誘導体を,in vitroおよびin vivoのサンプルの両方で特定しました.
結論:
- S-ニトロシル化は,MMP-9.0を含むMMPを活性化するための重要なメカニズムです.
- この活性化経路は,脳卒中のような状態でニューロン細胞死亡に寄与する.
- S-ニトロシル化MMPの酸化は,安定した,病理学的に活性な翻訳後の修正につながる.
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