胸痛患者における心筋不全時の血栓素産生とコンプレメント活性化の評価
G Montalescot1, G Drobinski, J Maclouf
1Department of Cardiology, Hôpital Pitié-Salpétrière, Paris, France.
Circulation
|November 1, 1991
まとめ
安定したアンギナを持つ患者は,イシュケミア中に血栓素の生産が増加することを示しますが,補完体系の活性化は観察されていません. これは,トランボキサンが補足物ではなく,アンギナに関連した心筋梗塞不全症に作用することを示唆しています.
科学分野:
- 心臓病学 心臓病学
- バイオケミストリー バイオケミストリー
- 免疫学 免疫学とは
背景:
- 補足系とアラキドン酸代謝産物は,心筋不全症に関与しています.
- 実験データによると,C5aは,トロンボキサン生成に寄与する可能性がある.
研究 の 目的:
- 安定した心筋梗塞の患者における短期間性心筋不全時のC5aとトロンボキサン産生を調査する.
- 補完体活性化と血小板の集積が,イシュケミア誘発の血小板素放出における役割を決定する.
主な方法:
- 冠動脈シヌス血におけるC5aとトロンボキサンB2のレベルを,心房ペースまたは皮膚経光冠動脈血管新生手術中に評価した.
- 測定された尿中トロンボキサンおよびプロスタサイクリンの代謝産物,運動前および運動後のテスト.
- 監視されたSTセグメントの変化と乳酸抽出で,イシュケミアの重さを評価した.
主要な成果:
- ペースによって誘発されたイシュケミアは,乳酸抽出の変化と相関する,冠動脈シナスのトロンボキサンB2レベルを増加させた.
- 低血症の間,C5a,C3a,またはC5b-9の有意な増加は検出されなかった.
- 安定したアンギナを患っている患者は,尿中トロンボキサン代謝物質のベースラインがより高く,慢性的な合成増加を示しています.
結論:
- トロンボキサンは,安定したアンギナにおいて,重要な血小板の集積とは無関係に,ペースが誘発した心筋梗塞症の間に急激に放出されます.
- コンプリメントシステムの活性化は,安定した心痛の短期的な不血症エピソードには関与していないようです.
- 安定した心筋梗塞の患者では,トランボキサン合成の慢性的な上昇が認められます.
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