冠動脈組織のプラズミノゲンアクティベーターの放出障害は冠動脈動脈硬化症と喫煙に関連している:内皮機能障害と動脈動脈栓塞の間の直接的な関連
D E Newby1, A L McLeod, N G Uren
1Departments of Cardiology, University of Edinburgh, Royal Infirmary, United Kingdom. d.e.newby@ed.ac.uk
Circulation
|April 18, 2001
まとめ
冠動脈のプラークと喫煙は,組織プラズミノゲン活性化剤 (tPA) を放出する心臓の能力を低下させます. この繊維分解能力の低下は,内皮機能不全と関連しており,喫煙者の心臓発作治療に影響を与える可能性があります.
科学分野:
- 心臓病学 心臓病学
- 血管生物学 血管生物学
- トロンボシス (Thrombosis) とは
背景:
- 動脈硬化症と喫煙は,心血管疾患の危険因子として知られています.
- 刺激された組織プラズミノゲン活性化剤 (tPA) 放出に対する冠動脈動脈腫と喫煙の影響は,完全に理解されていません.
研究 の 目的:
- 胸前冠動脈動脈腫と喫煙が心からのtPAの刺激された放出に及ぼす影響を調査する.
- プラークの負荷,喫煙,および局所的な繊維分解能力との関係を調査する.
主な方法:
- 25人の患者が冠動脈血管撮影を受け,IVUSで評価された近隣のLADプラークの容量はIVUSで評価されました.
- 物質Pとナトリウムニトロプロシドに対するフィブリノリティック反応は,冠内輸液と血液採取で測定されました.
- 冠動脈の血流とtPA抗原/活性が分析されました.
主要な成果:
- LADにおけるプラーク負荷の増加は,活性型tPA放出と逆相関していた (r=-0.61,P=0.003).
- 現在の喫煙者および元喫煙者は,非喫煙者 (P<0.05) と比較して,アクティブtPAの冠動脈放出が著しく低下したことを示しました.
- 物質Pの注入はtPAの放出を増加させ,ナトリウムニトロプルシドは血流を増加させました.
結論:
- 冠動脈動脈胞性プラークの負荷と喫煙習慣は,局所的な繊維分解能力の低下と関連しています.
- 発見は,内生性線維分解,内皮機能不全,動脈動脈栓症との関連性を示唆しています.
- これらの要因は,喫煙者における心筋梗塞に対する血栓解消薬療法の有効性の変動を説明する可能性がある.
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