自ら実現する予言:C反応性タンパク質は酸化窒素の産生を弱め,血管新生を抑制する
Subodh Verma1, Chao-Hung Wang, Shu-Hong Li
1Division of Cardiac Surgery, Toronto General Hospital, University of Toronto, Toronto, Canada. subodh.verma@sympatico.ca
Circulation
|August 21, 2002
まとめ
C反応性タンパク質 (CRP) は,内皮 NO 合成酵素 (eNOS) のmRNAの安定性に影響を及ぼすことによって,酸化窒素 (NO) の生成を直接減少させます. このNOの生物利用性の低下は血管新生を阻害し,心血管疾患に寄与する可能性があります.
科学分野:
- 心血管生物学 心血管生物学
- 分子医学は分子医学である.
- 炎症の研究 炎症の研究
背景:
- 酸化窒素 (NO) は,心血管の健康と疾患において重要な役割を果たします.
- C反応性タンパク質 (CRP) は,心血管疾患の強力な予測因子です.
- CRPとNOの生成の関係については,詳しく説明する必要があります.
研究 の 目的:
- CRPが酸化窒素 (NO) 産生に影響するかどうかを調査する.
- CRPがNO合成に影響を与える分子メカニズムを決定する.
- 内皮細胞機能と血管新生に対するCRPの影響を評価する.
主な方法:
- 再結合CRP.の濃度が異なる内皮細胞 (ECs) のインキュベーション.
- NOとサイクルグアノシンモノフォスファート (cGMP) 生産の測定.
- 内皮 NO 合成酵素 (eNOS) のmRNAとタンパク質発現とmRNAの安定性の分析.
- EC生存,アポトーシス,移住,およびインビトロ血管新生の評価.
主要な成果:
- CRPは,ECsからの基礎的および刺激されたNOとcGMPの放出を著しく抑制し,刺激しました.
- CRPは,主にmRNAの安定性の低下を通じて,eNOS mRNAとタンパク質発現をダウンレギュレーションしました.
- CRPは基礎およびVEGF刺激による血管新生を減少させ,NO依存ECアポトーシスを促進した.
結論:
- CRPは,eNOS mRNAの転写後の調節を通じて,NOの生成を直接抑制する.
- CRPによるNOの生物利用性の低下は,重要な補償メカニズムである血管新生を阻害する.
- CRP媒介によるNO合成の減少は,心血管疾患の発症に寄与する可能性があります.
- 血CRPレベルを標的とした治療戦略は,NOの生物利用性を高め,心血管疾患のリスクを低減する可能性があります.
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