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Bacterial Phylum Spirochaetes
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選択性サイクロオキシゲネーゼ-2阻害剤が塩分による高血圧における内皮機能に与える差異的な効果
Matthias Hermann1, Giovanni Camici, Aisha Fratton
1Cardiology, Cardiovascular Center, University Hospital Zürich, the Institute of Physiology, University of Zürich-Irchel, Germany.
Circulation
|November 5, 2003
まとめ
セレコキシブは,ロフェコキシブやディクロフェナックとは異なり,塩による高血圧において,内皮機能障害を改善し,酸化ストレスを軽減した. これは,COX-2阻害剤の間で異なる心血管安全効果を強調しています.
科学分野:
- 心血管薬理学について
- 高血圧の研究 高血圧の研究
- 内皮機能研究 エンドセル機能研究
背景:
- 選択性サイクロオキシゲネーゼ (COX) -2 阻害剤 (コキシブ) の心血管安全性については,依然として議論の余地があります.
- 内皮機能不全は,心血管疾患の重要な代理マーカーです.
- 塩による高血圧は,心血管疾患のリスクを研究するための適切なモデルです.
研究 の 目的:
- 2つの異なるコキシブ (ロフェコキシブ,セレコキシブ) と伝統的なNSAID (ディクロフェナック) の内皮機能不全に対する効果を比較する.
- 塩による高血圧のモデルでこれらの効果を調査する.
- 酸化ストレスマーカーへの影響を評価する.
主な方法:
- 塩分に敏感 (DS) であり,塩分に耐性 (DR) があるダールラットは,高ナトリウムダイエットを与えられた.
- ディクロフェナック,ロフェコキシブ,セレコキシブは35日から56日まで投与された.
- 内皮機能はアセチルコリン誘発による大動脈環のリラックスによって評価された.
- NO放出と酸化ストレスを評価するために,酸化窒素合成酵素阻害と8-イソプロスタンのレベルを測定しました.
主要な成果:
- セレコキシブは,ロフェコキシブやディクロフェナックではなく,高血圧ラットにおけるNO媒介の内皮依存リラクゼーションを改善した.
- セレコキシブは基礎酸化窒素 (NO) の放出を正常化し,他の治療はそうしなかった.
- セレコキシブは,高濃度の8-イソプロスタンを有意に低下させ,酸化ストレスが減少したことを示した.
結論:
- セレコキシブは,塩による高血圧における内皮機能障害と酸化ストレスに有益な効果を示しています.
- ロフェコキシブとディクロフェナックは同様の改善を示さなかったため,コキシブ間の異なる心血管安全プロファイルを示唆した.
- これらの発見は,コキシブクラス内の薬剤特異的な効果を考慮することの重要性を強調しています.
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